./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/Problem05_label46+token_ring.13.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b5237d83 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d01e667-bcc7-433f-9ad8-2f0f18c65908/bin/utaipan-g80aRyZoba/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d01e667-bcc7-433f-9ad8-2f0f18c65908/bin/utaipan-g80aRyZoba/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d01e667-bcc7-433f-9ad8-2f0f18c65908/bin/utaipan-g80aRyZoba/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d01e667-bcc7-433f-9ad8-2f0f18c65908/bin/utaipan-g80aRyZoba/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/Problem05_label46+token_ring.13.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d01e667-bcc7-433f-9ad8-2f0f18c65908/bin/utaipan-g80aRyZoba/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d01e667-bcc7-433f-9ad8-2f0f18c65908/bin/utaipan-g80aRyZoba --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 39c77cf00428880e24d066dff5fe9610612ae1f22999f65a4af3f1456418d087 --- 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-b5237d8 [2022-11-22 02:41:45,956 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-22 02:41:45,959 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-22 02:41:45,992 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-22 02:41:45,993 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-22 02:41:45,994 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-22 02:41:45,997 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-22 02:41:46,002 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-22 02:41:46,005 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-22 02:41:46,008 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-22 02:41:46,010 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-22 02:41:46,012 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-22 02:41:46,013 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-22 02:41:46,016 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-22 02:41:46,018 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-22 02:41:46,020 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-22 02:41:46,023 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-22 02:41:46,028 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-22 02:41:46,030 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-22 02:41:46,031 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-22 02:41:46,033 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-22 02:41:46,034 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-22 02:41:46,035 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-22 02:41:46,036 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-22 02:41:46,040 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-22 02:41:46,040 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-22 02:41:46,041 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-22 02:41:46,042 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-22 02:41:46,042 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-22 02:41:46,043 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-22 02:41:46,043 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-22 02:41:46,044 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-22 02:41:46,045 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-22 02:41:46,046 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-22 02:41:46,047 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-22 02:41:46,047 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-22 02:41:46,048 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-22 02:41:46,049 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-22 02:41:46,049 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-22 02:41:46,050 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-22 02:41:46,051 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-22 02:41:46,052 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d01e667-bcc7-433f-9ad8-2f0f18c65908/bin/utaipan-g80aRyZoba/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-22 02:41:46,093 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-22 02:41:46,094 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-22 02:41:46,094 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-22 02:41:46,095 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-22 02:41:46,096 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-22 02:41:46,096 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-22 02:41:46,096 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-22 02:41:46,096 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-22 02:41:46,096 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-22 02:41:46,096 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-22 02:41:46,097 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-22 02:41:46,098 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-22 02:41:46,098 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-22 02:41:46,098 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-22 02:41:46,098 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-22 02:41:46,099 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-22 02:41:46,099 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-22 02:41:46,099 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-22 02:41:46,100 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-22 02:41:46,100 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-22 02:41:46,100 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-22 02:41:46,100 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-22 02:41:46,100 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-22 02:41:46,100 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-22 02:41:46,101 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-22 02:41:46,101 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-22 02:41:46,101 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-22 02:41:46,102 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-22 02:41:46,102 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-22 02:41:46,102 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-22 02:41:46,102 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-22 02:41:46,103 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-22 02:41:46,103 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 02:41:46,103 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-22 02:41:46,103 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-22 02:41:46,103 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-22 02:41:46,104 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-22 02:41:46,104 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-22 02:41:46,104 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-22 02:41:46,105 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-22 02:41:46,105 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-22 02:41:46,105 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_1d01e667-bcc7-433f-9ad8-2f0f18c65908/bin/utaipan-g80aRyZoba/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d01e667-bcc7-433f-9ad8-2f0f18c65908/bin/utaipan-g80aRyZoba Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 39c77cf00428880e24d066dff5fe9610612ae1f22999f65a4af3f1456418d087 [2022-11-22 02:41:46,420 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-22 02:41:46,461 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-22 02:41:46,463 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-22 02:41:46,465 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-22 02:41:46,465 INFO L275 PluginConnector]: CDTParser initialized [2022-11-22 02:41:46,466 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d01e667-bcc7-433f-9ad8-2f0f18c65908/bin/utaipan-g80aRyZoba/../../sv-benchmarks/c/combinations/Problem05_label46+token_ring.13.cil-1.c [2022-11-22 02:41:49,509 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-22 02:41:50,396 INFO L351 CDTParser]: Found 1 translation units. [2022-11-22 02:41:50,397 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d01e667-bcc7-433f-9ad8-2f0f18c65908/sv-benchmarks/c/combinations/Problem05_label46+token_ring.13.cil-1.c [2022-11-22 02:41:50,471 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d01e667-bcc7-433f-9ad8-2f0f18c65908/bin/utaipan-g80aRyZoba/data/a5789c92e/3c4c324e4423475ea33f47902ed7d6d2/FLAG9c7289557 [2022-11-22 02:41:50,489 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d01e667-bcc7-433f-9ad8-2f0f18c65908/bin/utaipan-g80aRyZoba/data/a5789c92e/3c4c324e4423475ea33f47902ed7d6d2 [2022-11-22 02:41:50,494 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-22 02:41:50,495 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-22 02:41:50,499 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-22 02:41:50,499 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-22 02:41:50,503 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-22 02:41:50,505 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 02:41:50" (1/1) ... [2022-11-22 02:41:50,506 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4228fd53 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:41:50, skipping insertion in model container [2022-11-22 02:41:50,506 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 02:41:50" (1/1) ... [2022-11-22 02:41:50,513 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-22 02:41:50,773 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-22 02:41:53,119 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d01e667-bcc7-433f-9ad8-2f0f18c65908/sv-benchmarks/c/combinations/Problem05_label46+token_ring.13.cil-1.c[382357,382370] [2022-11-22 02:41:53,154 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d01e667-bcc7-433f-9ad8-2f0f18c65908/sv-benchmarks/c/combinations/Problem05_label46+token_ring.13.cil-1.c[383339,383352] [2022-11-22 02:41:53,593 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 02:41:53,606 INFO L203 MainTranslator]: Completed pre-run [2022-11-22 02:41:54,866 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d01e667-bcc7-433f-9ad8-2f0f18c65908/sv-benchmarks/c/combinations/Problem05_label46+token_ring.13.cil-1.c[382357,382370] [2022-11-22 02:41:54,871 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d01e667-bcc7-433f-9ad8-2f0f18c65908/sv-benchmarks/c/combinations/Problem05_label46+token_ring.13.cil-1.c[383339,383352] [2022-11-22 02:41:54,926 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 02:41:54,998 INFO L208 MainTranslator]: Completed translation [2022-11-22 02:41:54,998 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:41:54 WrapperNode [2022-11-22 02:41:54,998 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-22 02:41:55,000 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-22 02:41:55,000 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-22 02:41:55,000 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-22 02:41:55,008 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:41:54" (1/1) ... [2022-11-22 02:41:55,131 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:41:54" (1/1) ... [2022-11-22 02:41:55,544 INFO L138 Inliner]: procedures = 70, calls = 81, calls flagged for inlining = 47, calls inlined = 47, statements flattened = 13262 [2022-11-22 02:41:55,544 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-22 02:41:55,545 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-22 02:41:55,545 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-22 02:41:55,545 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-22 02:41:55,556 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:41:54" (1/1) ... [2022-11-22 02:41:55,556 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:41:54" (1/1) ... [2022-11-22 02:41:55,626 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:41:54" (1/1) ... [2022-11-22 02:41:55,626 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:41:54" (1/1) ... [2022-11-22 02:41:55,921 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:41:54" (1/1) ... [2022-11-22 02:41:56,037 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:41:54" (1/1) ... [2022-11-22 02:41:56,059 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:41:54" (1/1) ... [2022-11-22 02:41:56,081 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:41:54" (1/1) ... [2022-11-22 02:41:56,141 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-22 02:41:56,142 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-22 02:41:56,142 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-22 02:41:56,142 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-22 02:41:56,143 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:41:54" (1/1) ... [2022-11-22 02:41:56,150 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 02:41:56,163 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d01e667-bcc7-433f-9ad8-2f0f18c65908/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:41:56,176 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d01e667-bcc7-433f-9ad8-2f0f18c65908/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-22 02:41:56,186 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d01e667-bcc7-433f-9ad8-2f0f18c65908/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-22 02:41:56,224 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-22 02:41:56,225 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2022-11-22 02:41:56,225 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2022-11-22 02:41:56,225 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-11-22 02:41:56,225 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-11-22 02:41:56,225 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2022-11-22 02:41:56,225 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2022-11-22 02:41:56,226 INFO L130 BoogieDeclarations]: Found specification of procedure error [2022-11-22 02:41:56,226 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2022-11-22 02:41:56,226 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2022-11-22 02:41:56,226 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2022-11-22 02:41:56,226 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2022-11-22 02:41:56,226 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2022-11-22 02:41:56,227 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2022-11-22 02:41:56,227 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2022-11-22 02:41:56,227 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-22 02:41:56,227 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-22 02:41:56,227 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-22 02:41:56,447 INFO L235 CfgBuilder]: Building ICFG [2022-11-22 02:41:56,464 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-22 02:42:05,558 INFO L276 CfgBuilder]: Performing block encoding [2022-11-22 02:42:08,165 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-22 02:42:08,165 INFO L300 CfgBuilder]: Removed 17 assume(true) statements. [2022-11-22 02:42:08,171 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 02:42:08 BoogieIcfgContainer [2022-11-22 02:42:08,171 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-22 02:42:08,176 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-22 02:42:08,176 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-22 02:42:08,179 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-22 02:42:08,180 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 02:41:50" (1/3) ... [2022-11-22 02:42:08,181 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f269ae5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 02:42:08, skipping insertion in model container [2022-11-22 02:42:08,181 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:41:54" (2/3) ... [2022-11-22 02:42:08,181 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f269ae5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 02:42:08, skipping insertion in model container [2022-11-22 02:42:08,181 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 02:42:08" (3/3) ... [2022-11-22 02:42:08,184 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem05_label46+token_ring.13.cil-1.c [2022-11-22 02:42:08,205 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-22 02:42:08,205 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-22 02:42:08,297 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-22 02:42:08,303 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;@55707f51, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-22 02:42:08,303 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-22 02:42:08,314 INFO L276 IsEmpty]: Start isEmpty. Operand has 1848 states, 1809 states have (on average 1.9541182974018796) internal successors, (3535), 1814 states have internal predecessors, (3535), 29 states have call successors, (29), 7 states have call predecessors, (29), 7 states have return successors, (29), 28 states have call predecessors, (29), 29 states have call successors, (29) [2022-11-22 02:42:08,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-22 02:42:08,326 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:42:08,327 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:42:08,327 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:42:08,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:42:08,332 INFO L85 PathProgramCache]: Analyzing trace with hash -144616335, now seen corresponding path program 1 times [2022-11-22 02:42:08,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:42:08,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026938788] [2022-11-22 02:42:08,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:42:08,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:42:08,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:42:08,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:42:08,854 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:42:08,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026938788] [2022-11-22 02:42:08,855 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026938788] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:42:08,856 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:42:08,856 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-22 02:42:08,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280002943] [2022-11-22 02:42:08,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:42:08,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 02:42:08,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:42:08,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 02:42:08,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 02:42:08,911 INFO L87 Difference]: Start difference. First operand has 1848 states, 1809 states have (on average 1.9541182974018796) internal successors, (3535), 1814 states have internal predecessors, (3535), 29 states have call successors, (29), 7 states have call predecessors, (29), 7 states have return successors, (29), 28 states have call predecessors, (29), 29 states have call successors, (29) Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-22 02:42:10,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:42:10,155 INFO L93 Difference]: Finished difference Result 3877 states and 7503 transitions. [2022-11-22 02:42:10,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 02:42:10,158 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 71 [2022-11-22 02:42:10,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:42:10,186 INFO L225 Difference]: With dead ends: 3877 [2022-11-22 02:42:10,187 INFO L226 Difference]: Without dead ends: 2028 [2022-11-22 02:42:10,198 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 02:42:10,203 INFO L413 NwaCegarLoop]: 3548 mSDtfsCounter, 3820 mSDsluCounter, 3444 mSDsCounter, 0 mSdLazyCounter, 746 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3820 SdHoareTripleChecker+Valid, 6992 SdHoareTripleChecker+Invalid, 760 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 746 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-22 02:42:10,205 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3820 Valid, 6992 Invalid, 760 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [14 Valid, 746 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-22 02:42:10,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2028 states. [2022-11-22 02:42:10,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2028 to 2027. [2022-11-22 02:42:10,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2027 states, 1961 states have (on average 1.9163691993880674) internal successors, (3758), 1965 states have internal predecessors, (3758), 52 states have call successors, (52), 13 states have call predecessors, (52), 12 states have return successors, (50), 49 states have call predecessors, (50), 50 states have call successors, (50) [2022-11-22 02:42:10,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2027 states to 2027 states and 3860 transitions. [2022-11-22 02:42:10,369 INFO L78 Accepts]: Start accepts. Automaton has 2027 states and 3860 transitions. Word has length 71 [2022-11-22 02:42:10,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:42:10,370 INFO L495 AbstractCegarLoop]: Abstraction has 2027 states and 3860 transitions. [2022-11-22 02:42:10,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-22 02:42:10,371 INFO L276 IsEmpty]: Start isEmpty. Operand 2027 states and 3860 transitions. [2022-11-22 02:42:10,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-11-22 02:42:10,387 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:42:10,387 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:42:10,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-22 02:42:10,388 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:42:10,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:42:10,390 INFO L85 PathProgramCache]: Analyzing trace with hash -362769269, now seen corresponding path program 1 times [2022-11-22 02:42:10,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:42:10,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257726712] [2022-11-22 02:42:10,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:42:10,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:42:10,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:42:10,897 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-22 02:42:10,898 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:42:10,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257726712] [2022-11-22 02:42:10,898 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257726712] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:42:10,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703744044] [2022-11-22 02:42:10,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:42:10,899 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:42:10,899 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d01e667-bcc7-433f-9ad8-2f0f18c65908/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:42:10,903 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d01e667-bcc7-433f-9ad8-2f0f18c65908/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:42:10,932 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d01e667-bcc7-433f-9ad8-2f0f18c65908/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-22 02:42:11,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:42:11,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 1123 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-22 02:42:11,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:42:11,321 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-22 02:42:11,321 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:42:11,321 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1703744044] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:42:11,322 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 02:42:11,322 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-22 02:42:11,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735323760] [2022-11-22 02:42:11,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:42:11,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 02:42:11,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:42:11,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 02:42:11,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-22 02:42:11,325 INFO L87 Difference]: Start difference. First operand 2027 states and 3860 transitions. Second operand has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 2 states have internal predecessors, (107), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-22 02:42:11,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:42:11,899 INFO L93 Difference]: Finished difference Result 2782 states and 5049 transitions. [2022-11-22 02:42:11,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 02:42:11,900 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 2 states have internal predecessors, (107), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 144 [2022-11-22 02:42:11,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:42:11,912 INFO L225 Difference]: With dead ends: 2782 [2022-11-22 02:42:11,912 INFO L226 Difference]: Without dead ends: 2401 [2022-11-22 02:42:11,915 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-22 02:42:11,916 INFO L413 NwaCegarLoop]: 3374 mSDtfsCounter, 3533 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 325 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3533 SdHoareTripleChecker+Valid, 3621 SdHoareTripleChecker+Invalid, 327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-22 02:42:11,916 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3533 Valid, 3621 Invalid, 327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 325 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-22 02:42:11,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2401 states. [2022-11-22 02:42:11,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2401 to 2395. [2022-11-22 02:42:11,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2395 states, 2273 states have (on average 1.86229652441707) internal successors, (4233), 2278 states have internal predecessors, (4233), 96 states have call successors, (96), 25 states have call predecessors, (96), 24 states have return successors, (94), 92 states have call predecessors, (94), 94 states have call successors, (94) [2022-11-22 02:42:12,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2395 states to 2395 states and 4423 transitions. [2022-11-22 02:42:12,015 INFO L78 Accepts]: Start accepts. Automaton has 2395 states and 4423 transitions. Word has length 144 [2022-11-22 02:42:12,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:42:12,017 INFO L495 AbstractCegarLoop]: Abstraction has 2395 states and 4423 transitions. [2022-11-22 02:42:12,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 2 states have internal predecessors, (107), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-22 02:42:12,018 INFO L276 IsEmpty]: Start isEmpty. Operand 2395 states and 4423 transitions. [2022-11-22 02:42:12,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-11-22 02:42:12,030 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:42:12,030 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:42:12,038 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d01e667-bcc7-433f-9ad8-2f0f18c65908/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-22 02:42:12,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d01e667-bcc7-433f-9ad8-2f0f18c65908/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:42:12,238 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:42:12,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:42:12,239 INFO L85 PathProgramCache]: Analyzing trace with hash -1349451575, now seen corresponding path program 1 times [2022-11-22 02:42:12,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:42:12,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572732666] [2022-11-22 02:42:12,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:42:12,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:42:12,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:42:12,458 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-22 02:42:12,459 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:42:12,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572732666] [2022-11-22 02:42:12,459 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572732666] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:42:12,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351667768] [2022-11-22 02:42:12,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:42:12,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:42:12,460 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d01e667-bcc7-433f-9ad8-2f0f18c65908/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:42:12,461 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d01e667-bcc7-433f-9ad8-2f0f18c65908/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:42:12,467 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d01e667-bcc7-433f-9ad8-2f0f18c65908/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-22 02:42:12,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:42:12,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 1117 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-22 02:42:12,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:42:12,804 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-22 02:42:12,804 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:42:12,804 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1351667768] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:42:12,805 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 02:42:12,805 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-22 02:42:12,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495630959] [2022-11-22 02:42:12,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:42:12,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 02:42:12,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:42:12,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 02:42:12,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-22 02:42:12,807 INFO L87 Difference]: Start difference. First operand 2395 states and 4423 transitions. Second operand has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 2 states have internal predecessors, (95), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-22 02:42:13,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:42:13,393 INFO L93 Difference]: Finished difference Result 3880 states and 6758 transitions. [2022-11-22 02:42:13,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 02:42:13,394 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 2 states have internal predecessors, (95), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 144 [2022-11-22 02:42:13,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:42:13,408 INFO L225 Difference]: With dead ends: 3880 [2022-11-22 02:42:13,408 INFO L226 Difference]: Without dead ends: 3131 [2022-11-22 02:42:13,412 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-22 02:42:13,414 INFO L413 NwaCegarLoop]: 3373 mSDtfsCounter, 3545 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 325 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3545 SdHoareTripleChecker+Valid, 3620 SdHoareTripleChecker+Invalid, 327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-22 02:42:13,426 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3545 Valid, 3620 Invalid, 327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 325 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-22 02:42:13,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3131 states. [2022-11-22 02:42:13,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3131 to 3123. [2022-11-22 02:42:13,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3123 states, 2891 states have (on average 1.7886544448287789) internal successors, (5171), 2898 states have internal predecessors, (5171), 182 states have call successors, (182), 49 states have call predecessors, (182), 48 states have return successors, (180), 176 states have call predecessors, (180), 180 states have call successors, (180) [2022-11-22 02:42:13,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3123 states to 3123 states and 5533 transitions. [2022-11-22 02:42:13,560 INFO L78 Accepts]: Start accepts. Automaton has 3123 states and 5533 transitions. Word has length 144 [2022-11-22 02:42:13,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:42:13,561 INFO L495 AbstractCegarLoop]: Abstraction has 3123 states and 5533 transitions. [2022-11-22 02:42:13,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 2 states have internal predecessors, (95), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-22 02:42:13,561 INFO L276 IsEmpty]: Start isEmpty. Operand 3123 states and 5533 transitions. [2022-11-22 02:42:13,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-11-22 02:42:13,567 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:42:13,568 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:42:13,584 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d01e667-bcc7-433f-9ad8-2f0f18c65908/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-22 02:42:13,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d01e667-bcc7-433f-9ad8-2f0f18c65908/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:42:13,774 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:42:13,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:42:13,775 INFO L85 PathProgramCache]: Analyzing trace with hash 926613511, now seen corresponding path program 1 times [2022-11-22 02:42:13,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:42:13,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135396063] [2022-11-22 02:42:13,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:42:13,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:42:13,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:42:13,974 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-22 02:42:13,974 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:42:13,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135396063] [2022-11-22 02:42:13,974 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135396063] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:42:13,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291240961] [2022-11-22 02:42:13,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:42:13,975 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:42:13,975 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d01e667-bcc7-433f-9ad8-2f0f18c65908/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:42:13,976 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d01e667-bcc7-433f-9ad8-2f0f18c65908/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:42:13,998 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d01e667-bcc7-433f-9ad8-2f0f18c65908/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-22 02:42:14,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:42:14,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 1111 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-22 02:42:14,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:42:14,317 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-11-22 02:42:14,317 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:42:14,318 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [291240961] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:42:14,318 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 02:42:14,318 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-22 02:42:14,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791066694] [2022-11-22 02:42:14,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:42:14,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 02:42:14,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:42:14,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 02:42:14,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-22 02:42:14,320 INFO L87 Difference]: Start difference. First operand 3123 states and 5533 transitions. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 2 states have internal predecessors, (89), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-22 02:42:14,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:42:14,946 INFO L93 Difference]: Finished difference Result 6052 states and 10126 transitions. [2022-11-22 02:42:14,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 02:42:14,947 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 2 states have internal predecessors, (89), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 144 [2022-11-22 02:42:14,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:42:14,971 INFO L225 Difference]: With dead ends: 6052 [2022-11-22 02:42:14,972 INFO L226 Difference]: Without dead ends: 4575 [2022-11-22 02:42:14,980 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-22 02:42:14,983 INFO L413 NwaCegarLoop]: 3372 mSDtfsCounter, 3551 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 325 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3551 SdHoareTripleChecker+Valid, 3619 SdHoareTripleChecker+Invalid, 327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-22 02:42:14,991 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3551 Valid, 3619 Invalid, 327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 325 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-22 02:42:15,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4575 states. [2022-11-22 02:42:15,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4575 to 4563. [2022-11-22 02:42:15,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4563 states, 4115 states have (on average 1.7066828675577157) internal successors, (7023), 4126 states have internal predecessors, (7023), 350 states have call successors, (350), 97 states have call predecessors, (350), 96 states have return successors, (348), 340 states have call predecessors, (348), 348 states have call successors, (348) [2022-11-22 02:42:15,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4563 states to 4563 states and 7721 transitions. [2022-11-22 02:42:15,219 INFO L78 Accepts]: Start accepts. Automaton has 4563 states and 7721 transitions. Word has length 144 [2022-11-22 02:42:15,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:42:15,220 INFO L495 AbstractCegarLoop]: Abstraction has 4563 states and 7721 transitions. [2022-11-22 02:42:15,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 2 states have internal predecessors, (89), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-22 02:42:15,220 INFO L276 IsEmpty]: Start isEmpty. Operand 4563 states and 7721 transitions. [2022-11-22 02:42:15,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-11-22 02:42:15,228 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:42:15,228 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:42:15,241 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d01e667-bcc7-433f-9ad8-2f0f18c65908/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-11-22 02:42:15,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d01e667-bcc7-433f-9ad8-2f0f18c65908/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:42:15,436 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:42:15,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:42:15,436 INFO L85 PathProgramCache]: Analyzing trace with hash -1058268987, now seen corresponding path program 1 times [2022-11-22 02:42:15,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:42:15,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466389238] [2022-11-22 02:42:15,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:42:15,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:42:15,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:42:15,783 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-22 02:42:15,784 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:42:15,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466389238] [2022-11-22 02:42:15,784 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466389238] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:42:15,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940929909] [2022-11-22 02:42:15,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:42:15,784 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:42:15,785 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d01e667-bcc7-433f-9ad8-2f0f18c65908/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:42:15,786 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d01e667-bcc7-433f-9ad8-2f0f18c65908/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:42:15,810 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d01e667-bcc7-433f-9ad8-2f0f18c65908/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-22 02:42:16,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:42:16,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 1105 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-22 02:42:16,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:42:16,152 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-22 02:42:16,153 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:42:16,153 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [940929909] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:42:16,153 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 02:42:16,153 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-22 02:42:16,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343500141] [2022-11-22 02:42:16,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:42:16,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 02:42:16,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:42:16,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 02:42:16,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-22 02:42:16,156 INFO L87 Difference]: Start difference. First operand 4563 states and 7721 transitions. Second operand has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 2 states have internal predecessors, (116), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-22 02:42:16,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:42:16,848 INFO L93 Difference]: Finished difference Result 10348 states and 16762 transitions. [2022-11-22 02:42:16,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 02:42:16,849 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 2 states have internal predecessors, (116), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 144 [2022-11-22 02:42:16,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:42:16,885 INFO L225 Difference]: With dead ends: 10348 [2022-11-22 02:42:16,885 INFO L226 Difference]: Without dead ends: 7431 [2022-11-22 02:42:16,897 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-22 02:42:16,898 INFO L413 NwaCegarLoop]: 3333 mSDtfsCounter, 3524 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 321 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3524 SdHoareTripleChecker+Valid, 3580 SdHoareTripleChecker+Invalid, 323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-22 02:42:16,898 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3524 Valid, 3580 Invalid, 323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 321 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-22 02:42:16,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7431 states. [2022-11-22 02:42:17,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7431 to 7411. [2022-11-22 02:42:17,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7411 states, 6539 states have (on average 1.6331243309374521) internal successors, (10679), 6558 states have internal predecessors, (10679), 678 states have call successors, (678), 193 states have call predecessors, (678), 192 states have return successors, (676), 660 states have call predecessors, (676), 676 states have call successors, (676) [2022-11-22 02:42:17,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7411 states to 7411 states and 12033 transitions. [2022-11-22 02:42:17,226 INFO L78 Accepts]: Start accepts. Automaton has 7411 states and 12033 transitions. Word has length 144 [2022-11-22 02:42:17,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:42:17,226 INFO L495 AbstractCegarLoop]: Abstraction has 7411 states and 12033 transitions. [2022-11-22 02:42:17,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 2 states have internal predecessors, (116), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-22 02:42:17,227 INFO L276 IsEmpty]: Start isEmpty. Operand 7411 states and 12033 transitions. [2022-11-22 02:42:17,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-11-22 02:42:17,239 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:42:17,239 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:42:17,251 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d01e667-bcc7-433f-9ad8-2f0f18c65908/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-22 02:42:17,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d01e667-bcc7-433f-9ad8-2f0f18c65908/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:42:17,446 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:42:17,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:42:17,447 INFO L85 PathProgramCache]: Analyzing trace with hash -1794421049, now seen corresponding path program 1 times [2022-11-22 02:42:17,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:42:17,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789918852] [2022-11-22 02:42:17,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:42:17,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:42:17,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:42:17,675 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-22 02:42:17,675 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:42:17,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789918852] [2022-11-22 02:42:17,676 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789918852] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:42:17,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213136578] [2022-11-22 02:42:17,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:42:17,676 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:42:17,676 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d01e667-bcc7-433f-9ad8-2f0f18c65908/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:42:17,677 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d01e667-bcc7-433f-9ad8-2f0f18c65908/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:42:17,705 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d01e667-bcc7-433f-9ad8-2f0f18c65908/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-22 02:42:17,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:42:17,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 1099 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-22 02:42:17,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:42:18,009 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-22 02:42:18,009 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:42:18,010 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1213136578] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:42:18,010 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 02:42:18,010 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-22 02:42:18,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953178252] [2022-11-22 02:42:18,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:42:18,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 02:42:18,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:42:18,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 02:42:18,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-22 02:42:18,012 INFO L87 Difference]: Start difference. First operand 7411 states and 12033 transitions. Second operand has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 2 states have internal predecessors, (86), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-22 02:42:19,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:42:19,061 INFO L93 Difference]: Finished difference Result 18844 states and 29834 transitions. [2022-11-22 02:42:19,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 02:42:19,062 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 2 states have internal predecessors, (86), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 144 [2022-11-22 02:42:19,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:42:19,144 INFO L225 Difference]: With dead ends: 18844 [2022-11-22 02:42:19,144 INFO L226 Difference]: Without dead ends: 13079 [2022-11-22 02:42:19,173 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-22 02:42:19,174 INFO L413 NwaCegarLoop]: 3333 mSDtfsCounter, 3554 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 321 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3554 SdHoareTripleChecker+Valid, 3580 SdHoareTripleChecker+Invalid, 323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-22 02:42:19,175 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3554 Valid, 3580 Invalid, 323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 321 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-22 02:42:19,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13079 states. [2022-11-22 02:42:19,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13079 to 13043. [2022-11-22 02:42:19,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13043 states, 11339 states have (on average 1.578181497486551) internal successors, (17895), 11374 states have internal predecessors, (17895), 1318 states have call successors, (1318), 385 states have call predecessors, (1318), 384 states have return successors, (1316), 1284 states have call predecessors, (1316), 1316 states have call successors, (1316) [2022-11-22 02:42:20,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13043 states to 13043 states and 20529 transitions. [2022-11-22 02:42:20,048 INFO L78 Accepts]: Start accepts. Automaton has 13043 states and 20529 transitions. Word has length 144 [2022-11-22 02:42:20,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:42:20,050 INFO L495 AbstractCegarLoop]: Abstraction has 13043 states and 20529 transitions. [2022-11-22 02:42:20,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 2 states have internal predecessors, (86), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-22 02:42:20,051 INFO L276 IsEmpty]: Start isEmpty. Operand 13043 states and 20529 transitions. [2022-11-22 02:42:20,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-11-22 02:42:20,083 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:42:20,083 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:42:20,097 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d01e667-bcc7-433f-9ad8-2f0f18c65908/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-22 02:42:20,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d01e667-bcc7-433f-9ad8-2f0f18c65908/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:42:20,292 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:42:20,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:42:20,293 INFO L85 PathProgramCache]: Analyzing trace with hash -319187639, now seen corresponding path program 1 times [2022-11-22 02:42:20,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:42:20,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285375562] [2022-11-22 02:42:20,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:42:20,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:42:20,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:42:20,515 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-22 02:42:20,515 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:42:20,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285375562] [2022-11-22 02:42:20,515 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285375562] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:42:20,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778663682] [2022-11-22 02:42:20,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:42:20,516 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:42:20,516 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d01e667-bcc7-433f-9ad8-2f0f18c65908/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:42:20,517 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d01e667-bcc7-433f-9ad8-2f0f18c65908/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:42:20,547 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d01e667-bcc7-433f-9ad8-2f0f18c65908/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-22 02:42:20,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:42:20,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 1093 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-22 02:42:20,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:42:20,902 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-22 02:42:20,902 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:42:20,903 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [778663682] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:42:20,903 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 02:42:20,903 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-22 02:42:20,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845744924] [2022-11-22 02:42:20,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:42:20,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 02:42:20,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:42:20,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 02:42:20,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-22 02:42:20,906 INFO L87 Difference]: Start difference. First operand 13043 states and 20529 transitions. Second operand has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 2 states have internal predecessors, (113), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-22 02:42:22,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:42:22,475 INFO L93 Difference]: Finished difference Result 35644 states and 55578 transitions. [2022-11-22 02:42:22,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 02:42:22,476 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 2 states have internal predecessors, (113), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 144 [2022-11-22 02:42:22,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:42:22,586 INFO L225 Difference]: With dead ends: 35644 [2022-11-22 02:42:22,587 INFO L226 Difference]: Without dead ends: 24247 [2022-11-22 02:42:22,632 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-22 02:42:22,633 INFO L413 NwaCegarLoop]: 3333 mSDtfsCounter, 3527 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 321 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3527 SdHoareTripleChecker+Valid, 3580 SdHoareTripleChecker+Invalid, 323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-22 02:42:22,634 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3527 Valid, 3580 Invalid, 323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 321 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-22 02:42:22,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24247 states. [2022-11-22 02:42:23,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24247 to 24179. [2022-11-22 02:42:23,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24179 states, 20843 states have (on average 1.5417646212157559) internal successors, (32135), 20910 states have internal predecessors, (32135), 2566 states have call successors, (2566), 769 states have call predecessors, (2566), 768 states have return successors, (2564), 2500 states have call predecessors, (2564), 2564 states have call successors, (2564) [2022-11-22 02:42:23,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24179 states to 24179 states and 37265 transitions. [2022-11-22 02:42:23,793 INFO L78 Accepts]: Start accepts. Automaton has 24179 states and 37265 transitions. Word has length 144 [2022-11-22 02:42:23,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:42:23,793 INFO L495 AbstractCegarLoop]: Abstraction has 24179 states and 37265 transitions. [2022-11-22 02:42:23,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 2 states have internal predecessors, (113), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-22 02:42:23,798 INFO L276 IsEmpty]: Start isEmpty. Operand 24179 states and 37265 transitions. [2022-11-22 02:42:23,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-11-22 02:42:23,843 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:42:23,843 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:42:23,855 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d01e667-bcc7-433f-9ad8-2f0f18c65908/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-22 02:42:24,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d01e667-bcc7-433f-9ad8-2f0f18c65908/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:42:24,050 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:42:24,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:42:24,051 INFO L85 PathProgramCache]: Analyzing trace with hash -922253305, now seen corresponding path program 1 times [2022-11-22 02:42:24,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:42:24,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072886639] [2022-11-22 02:42:24,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:42:24,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:42:24,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:42:24,233 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-22 02:42:24,233 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:42:24,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072886639] [2022-11-22 02:42:24,233 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072886639] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:42:24,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408361614] [2022-11-22 02:42:24,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:42:24,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:42:24,234 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d01e667-bcc7-433f-9ad8-2f0f18c65908/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:42:24,235 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d01e667-bcc7-433f-9ad8-2f0f18c65908/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:42:24,238 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d01e667-bcc7-433f-9ad8-2f0f18c65908/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-22 02:42:24,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:42:24,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 1087 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-22 02:42:24,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:42:24,584 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-22 02:42:24,584 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:42:24,584 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [408361614] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:42:24,585 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 02:42:24,585 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-22 02:42:24,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509704526] [2022-11-22 02:42:24,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:42:24,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 02:42:24,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:42:24,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 02:42:24,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-22 02:42:24,587 INFO L87 Difference]: Start difference. First operand 24179 states and 37265 transitions. Second operand has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 2 states have internal predecessors, (101), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-22 02:42:26,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:42:26,869 INFO L93 Difference]: Finished difference Result 68860 states and 106266 transitions. [2022-11-22 02:42:26,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 02:42:26,872 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 2 states have internal predecessors, (101), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 144 [2022-11-22 02:42:26,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:42:27,117 INFO L225 Difference]: With dead ends: 68860 [2022-11-22 02:42:27,118 INFO L226 Difference]: Without dead ends: 46327 [2022-11-22 02:42:27,191 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-22 02:42:27,192 INFO L413 NwaCegarLoop]: 3333 mSDtfsCounter, 3539 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 321 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3539 SdHoareTripleChecker+Valid, 3580 SdHoareTripleChecker+Invalid, 323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-22 02:42:27,192 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3539 Valid, 3580 Invalid, 323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 321 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-22 02:42:27,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46327 states. [2022-11-22 02:42:29,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46327 to 46195. [2022-11-22 02:42:29,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46195 states, 39659 states have (on average 1.5187221059532514) internal successors, (60231), 39790 states have internal predecessors, (60231), 4998 states have call successors, (4998), 1537 states have call predecessors, (4998), 1536 states have return successors, (4996), 4868 states have call predecessors, (4996), 4996 states have call successors, (4996) [2022-11-22 02:42:29,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46195 states to 46195 states and 70225 transitions. [2022-11-22 02:42:29,432 INFO L78 Accepts]: Start accepts. Automaton has 46195 states and 70225 transitions. Word has length 144 [2022-11-22 02:42:29,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:42:29,433 INFO L495 AbstractCegarLoop]: Abstraction has 46195 states and 70225 transitions. [2022-11-22 02:42:29,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 2 states have internal predecessors, (101), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-22 02:42:29,433 INFO L276 IsEmpty]: Start isEmpty. Operand 46195 states and 70225 transitions. [2022-11-22 02:42:29,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-11-22 02:42:29,510 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:42:29,511 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:42:29,522 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d01e667-bcc7-433f-9ad8-2f0f18c65908/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-22 02:42:29,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d01e667-bcc7-433f-9ad8-2f0f18c65908/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-22 02:42:29,718 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:42:29,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:42:29,718 INFO L85 PathProgramCache]: Analyzing trace with hash -621195835, now seen corresponding path program 1 times [2022-11-22 02:42:29,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:42:29,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113501308] [2022-11-22 02:42:29,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:42:29,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:42:29,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:42:30,810 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-11-22 02:42:30,811 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:42:30,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113501308] [2022-11-22 02:42:30,811 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113501308] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:42:30,811 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:42:30,811 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-22 02:42:30,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067934537] [2022-11-22 02:42:30,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:42:30,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-22 02:42:30,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:42:30,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-22 02:42:30,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-22 02:42:30,816 INFO L87 Difference]: Start difference. First operand 46195 states and 70225 transitions. Second operand has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-22 02:42:36,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:42:36,918 INFO L93 Difference]: Finished difference Result 158075 states and 238040 transitions. [2022-11-22 02:42:36,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-22 02:42:36,918 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 144 [2022-11-22 02:42:36,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:42:37,581 INFO L225 Difference]: With dead ends: 158075 [2022-11-22 02:42:37,582 INFO L226 Difference]: Without dead ends: 113527 [2022-11-22 02:42:37,710 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-11-22 02:42:37,712 INFO L413 NwaCegarLoop]: 3340 mSDtfsCounter, 4430 mSDsluCounter, 9818 mSDsCounter, 0 mSdLazyCounter, 1265 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4452 SdHoareTripleChecker+Valid, 13158 SdHoareTripleChecker+Invalid, 1416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 1265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-22 02:42:37,712 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4452 Valid, 13158 Invalid, 1416 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [151 Valid, 1265 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-22 02:42:37,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113527 states. [2022-11-22 02:42:42,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113527 to 89203. [2022-11-22 02:42:42,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89203 states, 76395 states have (on average 1.5038549643301262) internal successors, (114887), 76654 states have internal predecessors, (114887), 9734 states have call successors, (9734), 3073 states have call predecessors, (9734), 3072 states have return successors, (9732), 9476 states have call predecessors, (9732), 9732 states have call successors, (9732) [2022-11-22 02:42:43,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89203 states to 89203 states and 134353 transitions. [2022-11-22 02:42:43,270 INFO L78 Accepts]: Start accepts. Automaton has 89203 states and 134353 transitions. Word has length 144 [2022-11-22 02:42:43,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:42:43,271 INFO L495 AbstractCegarLoop]: Abstraction has 89203 states and 134353 transitions. [2022-11-22 02:42:43,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-22 02:42:43,272 INFO L276 IsEmpty]: Start isEmpty. Operand 89203 states and 134353 transitions. [2022-11-22 02:42:43,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-11-22 02:42:43,456 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:42:43,456 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:42:43,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-22 02:42:43,457 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:42:43,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:42:43,457 INFO L85 PathProgramCache]: Analyzing trace with hash -167839908, now seen corresponding path program 1 times [2022-11-22 02:42:43,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:42:43,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322671133] [2022-11-22 02:42:43,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:42:43,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:42:43,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:42:44,073 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-11-22 02:42:44,073 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:42:44,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322671133] [2022-11-22 02:42:44,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322671133] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:42:44,073 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:42:44,074 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-22 02:42:44,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139079108] [2022-11-22 02:42:44,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:42:44,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-22 02:42:44,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:42:44,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-22 02:42:44,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-22 02:42:44,075 INFO L87 Difference]: Start difference. First operand 89203 states and 134353 transitions. Second operand has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-22 02:42:52,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:42:52,875 INFO L93 Difference]: Finished difference Result 240251 states and 361303 transitions. [2022-11-22 02:42:52,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-22 02:42:52,876 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 145 [2022-11-22 02:42:52,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted.