./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread/queue_longer.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version dbf71c69 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7de9c109-f152-449e-a567-fe9ad6e661a3/bin/utaipan-G1rejxKTta/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7de9c109-f152-449e-a567-fe9ad6e661a3/bin/utaipan-G1rejxKTta/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7de9c109-f152-449e-a567-fe9ad6e661a3/bin/utaipan-G1rejxKTta/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7de9c109-f152-449e-a567-fe9ad6e661a3/bin/utaipan-G1rejxKTta/config/TaipanReach.xml -i ../../sv-benchmarks/c/pthread/queue_longer.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7de9c109-f152-449e-a567-fe9ad6e661a3/bin/utaipan-G1rejxKTta/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7de9c109-f152-449e-a567-fe9ad6e661a3/bin/utaipan-G1rejxKTta --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 9f874a9872f93f025fac23ebed37f94a1f3b80bd0133ea4d7e298577c4fec427 --- 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-dbf71c6-m [2022-10-17 17:41:34,477 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-17 17:41:34,480 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-17 17:41:34,518 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-17 17:41:34,518 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-17 17:41:34,520 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-17 17:41:34,522 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-17 17:41:34,525 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-17 17:41:34,528 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-17 17:41:34,529 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-17 17:41:34,530 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-17 17:41:34,532 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-17 17:41:34,533 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-17 17:41:34,535 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-17 17:41:34,536 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-17 17:41:34,538 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-17 17:41:34,540 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-17 17:41:34,541 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-17 17:41:34,544 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-17 17:41:34,547 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-17 17:41:34,549 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-17 17:41:34,551 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-17 17:41:34,553 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-17 17:41:34,554 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-17 17:41:34,560 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-10-17 17:41:34,561 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-10-17 17:41:34,561 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-10-17 17:41:34,563 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-10-17 17:41:34,563 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-10-17 17:41:34,565 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-10-17 17:41:34,565 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-10-17 17:41:34,566 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-10-17 17:41:34,567 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-10-17 17:41:34,568 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-10-17 17:41:34,570 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-10-17 17:41:34,570 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-10-17 17:41:34,571 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-10-17 17:41:34,572 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-10-17 17:41:34,572 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-17 17:41:34,574 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-17 17:41:34,575 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-17 17:41:34,576 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7de9c109-f152-449e-a567-fe9ad6e661a3/bin/utaipan-G1rejxKTta/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-10-17 17:41:34,601 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-17 17:41:34,602 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-17 17:41:34,602 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-17 17:41:34,603 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-17 17:41:34,604 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-17 17:41:34,604 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-17 17:41:34,605 INFO L138 SettingsManager]: * User list type=DISABLED [2022-10-17 17:41:34,605 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-10-17 17:41:34,605 INFO L138 SettingsManager]: * Explicit value domain=true [2022-10-17 17:41:34,606 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-10-17 17:41:34,606 INFO L138 SettingsManager]: * Octagon Domain=false [2022-10-17 17:41:34,607 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-10-17 17:41:34,607 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-10-17 17:41:34,607 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-10-17 17:41:34,608 INFO L138 SettingsManager]: * Interval Domain=false [2022-10-17 17:41:34,608 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-10-17 17:41:34,609 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-10-17 17:41:34,609 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-10-17 17:41:34,610 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-17 17:41:34,610 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-17 17:41:34,611 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-17 17:41:34,611 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-17 17:41:34,612 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-17 17:41:34,612 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-10-17 17:41:34,612 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-17 17:41:34,613 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-10-17 17:41:34,613 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-17 17:41:34,614 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-10-17 17:41:34,614 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-17 17:41:34,614 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-10-17 17:41:34,615 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-17 17:41:34,615 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-17 17:41:34,616 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 17:41:34,616 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-17 17:41:34,616 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-10-17 17:41:34,616 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-17 17:41:34,617 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-10-17 17:41:34,617 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-10-17 17:41:34,617 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-17 17:41:34,617 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-10-17 17:41:34,618 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-10-17 17:41:34,618 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_7de9c109-f152-449e-a567-fe9ad6e661a3/bin/utaipan-G1rejxKTta/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7de9c109-f152-449e-a567-fe9ad6e661a3/bin/utaipan-G1rejxKTta Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9f874a9872f93f025fac23ebed37f94a1f3b80bd0133ea4d7e298577c4fec427 [2022-10-17 17:41:34,883 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-17 17:41:34,905 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-17 17:41:34,908 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-17 17:41:34,909 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-17 17:41:34,910 INFO L275 PluginConnector]: CDTParser initialized [2022-10-17 17:41:34,911 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7de9c109-f152-449e-a567-fe9ad6e661a3/bin/utaipan-G1rejxKTta/../../sv-benchmarks/c/pthread/queue_longer.i [2022-10-17 17:41:34,987 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7de9c109-f152-449e-a567-fe9ad6e661a3/bin/utaipan-G1rejxKTta/data/daa48016f/a43a9469b3554438b4d71b604d5c2538/FLAG52763f366 [2022-10-17 17:41:35,663 INFO L306 CDTParser]: Found 1 translation units. [2022-10-17 17:41:35,664 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7de9c109-f152-449e-a567-fe9ad6e661a3/sv-benchmarks/c/pthread/queue_longer.i [2022-10-17 17:41:35,685 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7de9c109-f152-449e-a567-fe9ad6e661a3/bin/utaipan-G1rejxKTta/data/daa48016f/a43a9469b3554438b4d71b604d5c2538/FLAG52763f366 [2022-10-17 17:41:35,917 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7de9c109-f152-449e-a567-fe9ad6e661a3/bin/utaipan-G1rejxKTta/data/daa48016f/a43a9469b3554438b4d71b604d5c2538 [2022-10-17 17:41:35,922 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-17 17:41:35,925 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-10-17 17:41:35,929 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-17 17:41:35,929 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-17 17:41:35,933 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-17 17:41:35,934 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 05:41:35" (1/1) ... [2022-10-17 17:41:35,937 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2d5b7ac3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:41:35, skipping insertion in model container [2022-10-17 17:41:35,937 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 05:41:35" (1/1) ... [2022-10-17 17:41:35,946 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-17 17:41:36,024 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-17 17:41:36,546 WARN L230 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_7de9c109-f152-449e-a567-fe9ad6e661a3/sv-benchmarks/c/pthread/queue_longer.i[43296,43309] [2022-10-17 17:41:36,552 WARN L230 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_7de9c109-f152-449e-a567-fe9ad6e661a3/sv-benchmarks/c/pthread/queue_longer.i[43503,43516] [2022-10-17 17:41:36,555 WARN L230 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_7de9c109-f152-449e-a567-fe9ad6e661a3/sv-benchmarks/c/pthread/queue_longer.i[43783,43796] [2022-10-17 17:41:36,560 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 17:41:36,574 INFO L203 MainTranslator]: Completed pre-run [2022-10-17 17:41:36,627 WARN L230 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_7de9c109-f152-449e-a567-fe9ad6e661a3/sv-benchmarks/c/pthread/queue_longer.i[43296,43309] [2022-10-17 17:41:36,629 WARN L230 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_7de9c109-f152-449e-a567-fe9ad6e661a3/sv-benchmarks/c/pthread/queue_longer.i[43503,43516] [2022-10-17 17:41:36,632 WARN L230 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_7de9c109-f152-449e-a567-fe9ad6e661a3/sv-benchmarks/c/pthread/queue_longer.i[43783,43796] [2022-10-17 17:41:36,635 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 17:41:36,697 INFO L208 MainTranslator]: Completed translation [2022-10-17 17:41:36,698 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:41:36 WrapperNode [2022-10-17 17:41:36,698 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-17 17:41:36,699 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-17 17:41:36,700 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-17 17:41:36,700 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-17 17:41:36,708 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:41:36" (1/1) ... [2022-10-17 17:41:36,745 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:41:36" (1/1) ... [2022-10-17 17:41:36,784 INFO L138 Inliner]: procedures = 274, calls = 62, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 243 [2022-10-17 17:41:36,784 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-17 17:41:36,785 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-17 17:41:36,785 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-17 17:41:36,785 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-17 17:41:36,795 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:41:36" (1/1) ... [2022-10-17 17:41:36,795 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:41:36" (1/1) ... [2022-10-17 17:41:36,800 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:41:36" (1/1) ... [2022-10-17 17:41:36,800 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:41:36" (1/1) ... [2022-10-17 17:41:36,813 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:41:36" (1/1) ... [2022-10-17 17:41:36,818 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:41:36" (1/1) ... [2022-10-17 17:41:36,821 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:41:36" (1/1) ... [2022-10-17 17:41:36,824 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:41:36" (1/1) ... [2022-10-17 17:41:36,836 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-17 17:41:36,837 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-17 17:41:36,837 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-17 17:41:36,837 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-17 17:41:36,841 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:41:36" (1/1) ... [2022-10-17 17:41:36,848 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 17:41:36,860 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7de9c109-f152-449e-a567-fe9ad6e661a3/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:41:36,873 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7de9c109-f152-449e-a567-fe9ad6e661a3/bin/utaipan-G1rejxKTta/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-10-17 17:41:36,891 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7de9c109-f152-449e-a567-fe9ad6e661a3/bin/utaipan-G1rejxKTta/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-10-17 17:41:36,925 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2022-10-17 17:41:36,925 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2022-10-17 17:41:36,925 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2022-10-17 17:41:36,926 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2022-10-17 17:41:36,926 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-10-17 17:41:36,926 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-10-17 17:41:36,926 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-10-17 17:41:36,926 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-10-17 17:41:36,926 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-10-17 17:41:36,926 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-17 17:41:36,926 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-17 17:41:36,927 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-17 17:41:36,927 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-17 17:41:36,928 WARN L209 CfgBuilder]: User set CodeBlockSize to LoopFreeBlock but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-10-17 17:41:37,114 INFO L235 CfgBuilder]: Building ICFG [2022-10-17 17:41:37,116 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-17 17:41:37,674 INFO L276 CfgBuilder]: Performing block encoding [2022-10-17 17:41:37,687 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-17 17:41:37,688 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-10-17 17:41:37,691 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 05:41:37 BoogieIcfgContainer [2022-10-17 17:41:37,691 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-17 17:41:37,694 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-17 17:41:37,695 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-17 17:41:37,698 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-17 17:41:37,699 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.10 05:41:35" (1/3) ... [2022-10-17 17:41:37,700 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@113f4e8a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 05:41:37, skipping insertion in model container [2022-10-17 17:41:37,700 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:41:36" (2/3) ... [2022-10-17 17:41:37,700 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@113f4e8a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 05:41:37, skipping insertion in model container [2022-10-17 17:41:37,700 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 05:41:37" (3/3) ... [2022-10-17 17:41:37,702 INFO L112 eAbstractionObserver]: Analyzing ICFG queue_longer.i [2022-10-17 17:41:37,712 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-10-17 17:41:37,724 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-17 17:41:37,724 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2022-10-17 17:41:37,724 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-10-17 17:41:37,886 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-10-17 17:41:37,960 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-10-17 17:41:37,976 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 266 places, 274 transitions, 564 flow [2022-10-17 17:41:37,981 INFO L112 LiptonReduction]: Starting Lipton reduction on Petri net that has 266 places, 274 transitions, 564 flow [2022-10-17 17:41:37,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 266 places, 274 transitions, 564 flow [2022-10-17 17:41:38,204 INFO L130 PetriNetUnfolder]: 15/272 cut-off events. [2022-10-17 17:41:38,205 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-10-17 17:41:38,217 INFO L83 FinitePrefix]: Finished finitePrefix Result has 281 conditions, 272 events. 15/272 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 362 event pairs, 0 based on Foata normal form. 0/254 useless extension candidates. Maximal degree in co-relation 198. Up to 2 conditions per place. [2022-10-17 17:41:38,232 INFO L118 LiptonReduction]: Number of co-enabled transitions 16892 [2022-10-17 17:41:51,359 INFO L133 LiptonReduction]: Checked pairs total: 36216 [2022-10-17 17:41:51,359 INFO L135 LiptonReduction]: Total number of compositions: 244 [2022-10-17 17:41:51,368 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 64 places, 66 transitions, 148 flow [2022-10-17 17:41:51,453 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 1085 states, 1080 states have (on average 2.738888888888889) internal successors, (2958), 1084 states have internal predecessors, (2958), 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) [2022-10-17 17:41:51,472 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-17 17:41:51,479 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;@26d8379b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-17 17:41:51,480 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-10-17 17:41:51,485 INFO L276 IsEmpty]: Start isEmpty. Operand has 1085 states, 1080 states have (on average 2.738888888888889) internal successors, (2958), 1084 states have internal predecessors, (2958), 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) [2022-10-17 17:41:51,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2 [2022-10-17 17:41:51,490 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:41:51,491 INFO L195 NwaCegarLoop]: trace histogram [1] [2022-10-17 17:41:51,492 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-10-17 17:41:51,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:41:51,497 INFO L85 PathProgramCache]: Analyzing trace with hash 1069, now seen corresponding path program 1 times [2022-10-17 17:41:51,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:41:51,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871426330] [2022-10-17 17:41:51,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:41:51,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:41:51,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:41:51,623 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:41:51,624 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:41:51,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871426330] [2022-10-17 17:41:51,625 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871426330] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:41:51,625 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:41:51,626 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2022-10-17 17:41:51,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372642746] [2022-10-17 17:41:51,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:41:51,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-10-17 17:41:51,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:41:51,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-10-17 17:41:51,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-10-17 17:41:51,659 INFO L87 Difference]: Start difference. First operand has 1085 states, 1080 states have (on average 2.738888888888889) internal successors, (2958), 1084 states have internal predecessors, (2958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 1 states have (on average 1.0) internal successors, (1), 1 states have internal predecessors, (1), 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) [2022-10-17 17:41:51,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:41:51,776 INFO L93 Difference]: Finished difference Result 1084 states and 2923 transitions. [2022-10-17 17:41:51,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-10-17 17:41:51,779 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 1 states have (on average 1.0) internal successors, (1), 1 states have internal predecessors, (1), 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 1 [2022-10-17 17:41:51,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:41:51,836 INFO L225 Difference]: With dead ends: 1084 [2022-10-17 17:41:51,836 INFO L226 Difference]: Without dead ends: 1082 [2022-10-17 17:41:51,837 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 0 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-10-17 17:41:51,841 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 17:41:51,842 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 7 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 17:41:51,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1082 states. [2022-10-17 17:41:51,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1082 to 1082. [2022-10-17 17:41:51,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1082 states, 1079 states have (on average 2.7043558850787766) internal successors, (2918), 1081 states have internal predecessors, (2918), 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) [2022-10-17 17:41:51,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1082 states to 1082 states and 2918 transitions. [2022-10-17 17:41:51,951 INFO L78 Accepts]: Start accepts. Automaton has 1082 states and 2918 transitions. Word has length 1 [2022-10-17 17:41:51,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:41:51,952 INFO L495 AbstractCegarLoop]: Abstraction has 1082 states and 2918 transitions. [2022-10-17 17:41:51,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 1 states have (on average 1.0) internal successors, (1), 1 states have internal predecessors, (1), 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) [2022-10-17 17:41:51,952 INFO L276 IsEmpty]: Start isEmpty. Operand 1082 states and 2918 transitions. [2022-10-17 17:41:51,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-10-17 17:41:51,954 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:41:51,954 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:41:51,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-10-17 17:41:51,955 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-10-17 17:41:51,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:41:51,956 INFO L85 PathProgramCache]: Analyzing trace with hash 487421733, now seen corresponding path program 1 times [2022-10-17 17:41:51,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:41:51,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948973500] [2022-10-17 17:41:51,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:41:51,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:41:52,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:41:52,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:41:52,273 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:41:52,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948973500] [2022-10-17 17:41:52,275 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948973500] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:41:52,275 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:41:52,275 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 17:41:52,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333665493] [2022-10-17 17:41:52,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:41:52,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 17:41:52,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:41:52,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 17:41:52,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 17:41:52,282 INFO L87 Difference]: Start difference. First operand 1082 states and 2918 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) 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) [2022-10-17 17:41:52,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:41:52,438 INFO L93 Difference]: Finished difference Result 1082 states and 2882 transitions. [2022-10-17 17:41:52,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 17:41:52,439 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) 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 [2022-10-17 17:41:52,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:41:52,448 INFO L225 Difference]: With dead ends: 1082 [2022-10-17 17:41:52,448 INFO L226 Difference]: Without dead ends: 1082 [2022-10-17 17:41:52,448 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 17:41:52,450 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 22 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 17:41:52,451 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 17 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 17:41:52,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1082 states. [2022-10-17 17:41:52,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1082 to 1082. [2022-10-17 17:41:52,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1082 states, 1079 states have (on average 2.6709916589434664) internal successors, (2882), 1081 states have internal predecessors, (2882), 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) [2022-10-17 17:41:52,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1082 states to 1082 states and 2882 transitions. [2022-10-17 17:41:52,493 INFO L78 Accepts]: Start accepts. Automaton has 1082 states and 2882 transitions. Word has length 11 [2022-10-17 17:41:52,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:41:52,493 INFO L495 AbstractCegarLoop]: Abstraction has 1082 states and 2882 transitions. [2022-10-17 17:41:52,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) 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) [2022-10-17 17:41:52,494 INFO L276 IsEmpty]: Start isEmpty. Operand 1082 states and 2882 transitions. [2022-10-17 17:41:52,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-10-17 17:41:52,497 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:41:52,497 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:41:52,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-10-17 17:41:52,498 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-10-17 17:41:52,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:41:52,498 INFO L85 PathProgramCache]: Analyzing trace with hash 262651003, now seen corresponding path program 1 times [2022-10-17 17:41:52,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:41:52,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906797376] [2022-10-17 17:41:52,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:41:52,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:41:52,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:41:53,986 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:41:53,986 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:41:53,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906797376] [2022-10-17 17:41:53,987 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906797376] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:41:53,987 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:41:53,987 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-10-17 17:41:53,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750062408] [2022-10-17 17:41:53,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:41:53,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-10-17 17:41:53,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:41:53,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-10-17 17:41:53,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-10-17 17:41:53,989 INFO L87 Difference]: Start difference. First operand 1082 states and 2882 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 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) [2022-10-17 17:41:55,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:41:55,092 INFO L93 Difference]: Finished difference Result 1081 states and 2879 transitions. [2022-10-17 17:41:55,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-17 17:41:55,094 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 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 13 [2022-10-17 17:41:55,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:41:55,103 INFO L225 Difference]: With dead ends: 1081 [2022-10-17 17:41:55,103 INFO L226 Difference]: Without dead ends: 1081 [2022-10-17 17:41:55,104 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-10-17 17:41:55,108 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 5 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-10-17 17:41:55,110 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 28 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 219 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-10-17 17:41:55,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1081 states. [2022-10-17 17:41:55,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1081 to 1081. [2022-10-17 17:41:55,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1081 states, 1078 states have (on average 2.670686456400742) internal successors, (2879), 1080 states have internal predecessors, (2879), 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) [2022-10-17 17:41:55,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1081 states to 1081 states and 2879 transitions. [2022-10-17 17:41:55,156 INFO L78 Accepts]: Start accepts. Automaton has 1081 states and 2879 transitions. Word has length 13 [2022-10-17 17:41:55,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:41:55,159 INFO L495 AbstractCegarLoop]: Abstraction has 1081 states and 2879 transitions. [2022-10-17 17:41:55,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 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) [2022-10-17 17:41:55,159 INFO L276 IsEmpty]: Start isEmpty. Operand 1081 states and 2879 transitions. [2022-10-17 17:41:55,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-10-17 17:41:55,165 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:41:55,166 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:41:55,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-10-17 17:41:55,168 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-10-17 17:41:55,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:41:55,169 INFO L85 PathProgramCache]: Analyzing trace with hash -547222055, now seen corresponding path program 1 times [2022-10-17 17:41:55,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:41:55,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224477863] [2022-10-17 17:41:55,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:41:55,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:41:55,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:41:55,267 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:41:55,269 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:41:55,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224477863] [2022-10-17 17:41:55,273 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224477863] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:41:55,273 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:41:55,273 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-17 17:41:55,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138368874] [2022-10-17 17:41:55,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:41:55,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 17:41:55,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:41:55,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 17:41:55,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 17:41:55,276 INFO L87 Difference]: Start difference. First operand 1081 states and 2879 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 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) [2022-10-17 17:41:55,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:41:55,396 INFO L93 Difference]: Finished difference Result 973 states and 2534 transitions. [2022-10-17 17:41:55,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 17:41:55,396 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 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 13 [2022-10-17 17:41:55,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:41:55,404 INFO L225 Difference]: With dead ends: 973 [2022-10-17 17:41:55,404 INFO L226 Difference]: Without dead ends: 943 [2022-10-17 17:41:55,404 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 [2022-10-17 17:41:55,407 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 40 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 17:41:55,408 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 11 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 17:41:55,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 943 states. [2022-10-17 17:41:55,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 943 to 943. [2022-10-17 17:41:55,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 943 states, 940 states have (on average 2.620212765957447) internal successors, (2463), 942 states have internal predecessors, (2463), 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) [2022-10-17 17:41:55,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 943 states to 943 states and 2463 transitions. [2022-10-17 17:41:55,444 INFO L78 Accepts]: Start accepts. Automaton has 943 states and 2463 transitions. Word has length 13 [2022-10-17 17:41:55,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:41:55,445 INFO L495 AbstractCegarLoop]: Abstraction has 943 states and 2463 transitions. [2022-10-17 17:41:55,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 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) [2022-10-17 17:41:55,445 INFO L276 IsEmpty]: Start isEmpty. Operand 943 states and 2463 transitions. [2022-10-17 17:41:55,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-10-17 17:41:55,446 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:41:55,446 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:41:55,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-10-17 17:41:55,446 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-10-17 17:41:55,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:41:55,450 INFO L85 PathProgramCache]: Analyzing trace with hash -1445639971, now seen corresponding path program 1 times [2022-10-17 17:41:55,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:41:55,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166522227] [2022-10-17 17:41:55,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:41:55,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:41:55,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:41:56,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:41:56,618 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:41:56,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166522227] [2022-10-17 17:41:56,618 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166522227] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:41:56,618 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:41:56,619 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-10-17 17:41:56,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602536448] [2022-10-17 17:41:56,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:41:56,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-10-17 17:41:56,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:41:56,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-10-17 17:41:56,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-10-17 17:41:56,620 INFO L87 Difference]: Start difference. First operand 943 states and 2463 transitions. Second operand has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 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) [2022-10-17 17:41:58,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:41:58,103 INFO L93 Difference]: Finished difference Result 1008 states and 2623 transitions. [2022-10-17 17:41:58,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-17 17:41:58,103 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 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 [2022-10-17 17:41:58,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:41:58,112 INFO L225 Difference]: With dead ends: 1008 [2022-10-17 17:41:58,112 INFO L226 Difference]: Without dead ends: 1008 [2022-10-17 17:41:58,112 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-10-17 17:41:58,113 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 37 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 367 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 371 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 367 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-10-17 17:41:58,113 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 50 Invalid, 371 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 367 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-10-17 17:41:58,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1008 states. [2022-10-17 17:41:58,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1008 to 982. [2022-10-17 17:41:58,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 982 states, 979 states have (on average 2.6138917262512766) internal successors, (2559), 981 states have internal predecessors, (2559), 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) [2022-10-17 17:41:58,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 982 states to 982 states and 2559 transitions. [2022-10-17 17:41:58,149 INFO L78 Accepts]: Start accepts. Automaton has 982 states and 2559 transitions. Word has length 14 [2022-10-17 17:41:58,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:41:58,150 INFO L495 AbstractCegarLoop]: Abstraction has 982 states and 2559 transitions. [2022-10-17 17:41:58,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 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) [2022-10-17 17:41:58,150 INFO L276 IsEmpty]: Start isEmpty. Operand 982 states and 2559 transitions. [2022-10-17 17:41:58,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-10-17 17:41:58,151 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:41:58,151 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:41:58,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-10-17 17:41:58,152 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-10-17 17:41:58,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:41:58,152 INFO L85 PathProgramCache]: Analyzing trace with hash 1209502831, now seen corresponding path program 2 times [2022-10-17 17:41:58,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:41:58,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570041643] [2022-10-17 17:41:58,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:41:58,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:41:58,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:41:59,093 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:41:59,093 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:41:59,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570041643] [2022-10-17 17:41:59,094 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570041643] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:41:59,094 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:41:59,094 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-10-17 17:41:59,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5225229] [2022-10-17 17:41:59,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:41:59,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-10-17 17:41:59,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:41:59,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-10-17 17:41:59,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-10-17 17:41:59,097 INFO L87 Difference]: Start difference. First operand 982 states and 2559 transitions. Second operand has 10 states, 10 states have (on average 1.4) internal successors, (14), 9 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) [2022-10-17 17:41:59,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:41:59,642 INFO L93 Difference]: Finished difference Result 1009 states and 2622 transitions. [2022-10-17 17:41:59,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-10-17 17:41:59,643 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.4) internal successors, (14), 9 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 [2022-10-17 17:41:59,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:41:59,652 INFO L225 Difference]: With dead ends: 1009 [2022-10-17 17:41:59,653 INFO L226 Difference]: Without dead ends: 1009 [2022-10-17 17:41:59,653 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-10-17 17:41:59,654 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 61 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 472 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 488 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 472 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-10-17 17:41:59,654 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 67 Invalid, 488 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 472 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-10-17 17:41:59,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1009 states. [2022-10-17 17:41:59,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1009 to 930. [2022-10-17 17:41:59,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 930 states, 927 states have (on average 2.6084142394822005) internal successors, (2418), 929 states have internal predecessors, (2418), 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) [2022-10-17 17:41:59,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 930 states to 930 states and 2418 transitions. [2022-10-17 17:41:59,698 INFO L78 Accepts]: Start accepts. Automaton has 930 states and 2418 transitions. Word has length 14 [2022-10-17 17:41:59,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:41:59,698 INFO L495 AbstractCegarLoop]: Abstraction has 930 states and 2418 transitions. [2022-10-17 17:41:59,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.4) internal successors, (14), 9 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) [2022-10-17 17:41:59,699 INFO L276 IsEmpty]: Start isEmpty. Operand 930 states and 2418 transitions. [2022-10-17 17:41:59,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-10-17 17:41:59,700 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:41:59,700 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:41:59,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-10-17 17:41:59,701 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-10-17 17:41:59,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:41:59,701 INFO L85 PathProgramCache]: Analyzing trace with hash 527316063, now seen corresponding path program 1 times [2022-10-17 17:41:59,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:41:59,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694397087] [2022-10-17 17:41:59,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:41:59,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:41:59,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:42:00,816 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:42:00,816 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:42:00,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694397087] [2022-10-17 17:42:00,817 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694397087] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:42:00,817 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:42:00,817 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-10-17 17:42:00,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644822804] [2022-10-17 17:42:00,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:42:00,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-10-17 17:42:00,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:42:00,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-10-17 17:42:00,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-10-17 17:42:00,819 INFO L87 Difference]: Start difference. First operand 930 states and 2418 transitions. Second operand has 10 states, 10 states have (on average 1.4) internal successors, (14), 9 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) [2022-10-17 17:42:01,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:42:01,403 INFO L93 Difference]: Finished difference Result 928 states and 2414 transitions. [2022-10-17 17:42:01,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-10-17 17:42:01,404 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.4) internal successors, (14), 9 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 [2022-10-17 17:42:01,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:42:01,412 INFO L225 Difference]: With dead ends: 928 [2022-10-17 17:42:01,412 INFO L226 Difference]: Without dead ends: 928 [2022-10-17 17:42:01,413 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2022-10-17 17:42:01,414 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 28 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 400 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 400 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-10-17 17:42:01,415 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 49 Invalid, 414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 400 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-10-17 17:42:01,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 928 states. [2022-10-17 17:42:01,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 928 to 928. [2022-10-17 17:42:01,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 928 states, 925 states have (on average 2.6097297297297297) internal successors, (2414), 927 states have internal predecessors, (2414), 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) [2022-10-17 17:42:01,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 928 states to 928 states and 2414 transitions. [2022-10-17 17:42:01,468 INFO L78 Accepts]: Start accepts. Automaton has 928 states and 2414 transitions. Word has length 14 [2022-10-17 17:42:01,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:42:01,468 INFO L495 AbstractCegarLoop]: Abstraction has 928 states and 2414 transitions. [2022-10-17 17:42:01,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.4) internal successors, (14), 9 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) [2022-10-17 17:42:01,468 INFO L276 IsEmpty]: Start isEmpty. Operand 928 states and 2414 transitions. [2022-10-17 17:42:01,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-10-17 17:42:01,472 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:42:01,472 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:42:01,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-10-17 17:42:01,473 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-10-17 17:42:01,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:42:01,473 INFO L85 PathProgramCache]: Analyzing trace with hash -890096579, now seen corresponding path program 1 times [2022-10-17 17:42:01,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:42:01,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360782377] [2022-10-17 17:42:01,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:42:01,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:42:01,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:42:02,790 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:42:02,790 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:42:02,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360782377] [2022-10-17 17:42:02,790 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360782377] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:42:02,791 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:42:02,792 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-10-17 17:42:02,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400166473] [2022-10-17 17:42:02,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:42:02,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-10-17 17:42:02,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:42:02,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-10-17 17:42:02,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-10-17 17:42:02,794 INFO L87 Difference]: Start difference. First operand 928 states and 2414 transitions. Second operand has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 10 states have internal predecessors, (15), 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) [2022-10-17 17:42:03,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:42:03,635 INFO L93 Difference]: Finished difference Result 1033 states and 2681 transitions. [2022-10-17 17:42:03,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-10-17 17:42:03,640 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 10 states have internal predecessors, (15), 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 15 [2022-10-17 17:42:03,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:42:03,649 INFO L225 Difference]: With dead ends: 1033 [2022-10-17 17:42:03,649 INFO L226 Difference]: Without dead ends: 1011 [2022-10-17 17:42:03,650 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2022-10-17 17:42:03,652 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 88 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 699 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 713 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 699 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-10-17 17:42:03,652 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 94 Invalid, 713 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 699 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-10-17 17:42:03,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1011 states. [2022-10-17 17:42:03,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1011 to 945. [2022-10-17 17:42:03,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 945 states, 942 states have (on average 2.6061571125265393) internal successors, (2455), 944 states have internal predecessors, (2455), 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) [2022-10-17 17:42:03,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 945 states to 945 states and 2455 transitions. [2022-10-17 17:42:03,694 INFO L78 Accepts]: Start accepts. Automaton has 945 states and 2455 transitions. Word has length 15 [2022-10-17 17:42:03,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:42:03,694 INFO L495 AbstractCegarLoop]: Abstraction has 945 states and 2455 transitions. [2022-10-17 17:42:03,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 10 states have internal predecessors, (15), 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) [2022-10-17 17:42:03,695 INFO L276 IsEmpty]: Start isEmpty. Operand 945 states and 2455 transitions. [2022-10-17 17:42:03,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-10-17 17:42:03,695 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:42:03,696 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:42:03,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-10-17 17:42:03,696 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-10-17 17:42:03,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:42:03,697 INFO L85 PathProgramCache]: Analyzing trace with hash -836807721, now seen corresponding path program 2 times [2022-10-17 17:42:03,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:42:03,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987209887] [2022-10-17 17:42:03,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:42:03,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:42:03,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:42:04,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:42:04,655 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:42:04,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987209887] [2022-10-17 17:42:04,655 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987209887] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:42:04,655 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:42:04,655 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-10-17 17:42:04,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889448719] [2022-10-17 17:42:04,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:42:04,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-10-17 17:42:04,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:42:04,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-10-17 17:42:04,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2022-10-17 17:42:04,656 INFO L87 Difference]: Start difference. First operand 945 states and 2455 transitions. Second operand has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 10 states have internal predecessors, (15), 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) [2022-10-17 17:42:05,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:42:05,507 INFO L93 Difference]: Finished difference Result 1077 states and 2798 transitions. [2022-10-17 17:42:05,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-10-17 17:42:05,507 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 10 states have internal predecessors, (15), 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 15 [2022-10-17 17:42:05,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:42:05,515 INFO L225 Difference]: With dead ends: 1077 [2022-10-17 17:42:05,516 INFO L226 Difference]: Without dead ends: 1071 [2022-10-17 17:42:05,516 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2022-10-17 17:42:05,517 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 139 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 630 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 657 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 630 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-10-17 17:42:05,517 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 90 Invalid, 657 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 630 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-10-17 17:42:05,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1071 states. [2022-10-17 17:42:05,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1071 to 932. [2022-10-17 17:42:05,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 932 states, 929 states have (on average 2.6081808396124866) internal successors, (2423), 931 states have internal predecessors, (2423), 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) [2022-10-17 17:42:05,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 932 states to 932 states and 2423 transitions. [2022-10-17 17:42:05,551 INFO L78 Accepts]: Start accepts. Automaton has 932 states and 2423 transitions. Word has length 15 [2022-10-17 17:42:05,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:42:05,552 INFO L495 AbstractCegarLoop]: Abstraction has 932 states and 2423 transitions. [2022-10-17 17:42:05,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 10 states have internal predecessors, (15), 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) [2022-10-17 17:42:05,552 INFO L276 IsEmpty]: Start isEmpty. Operand 932 states and 2423 transitions. [2022-10-17 17:42:05,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-10-17 17:42:05,553 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:42:05,553 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:42:05,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-10-17 17:42:05,554 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-10-17 17:42:05,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:42:05,554 INFO L85 PathProgramCache]: Analyzing trace with hash -832339071, now seen corresponding path program 3 times [2022-10-17 17:42:05,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:42:05,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353201938] [2022-10-17 17:42:05,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:42:05,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:42:05,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat