./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.krebs.4.prop1-func-interl.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a 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_8b891fb1-e8a9-4ba4-a8d7-a156e3019fb7/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b891fb1-e8a9-4ba4-a8d7-a156e3019fb7/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b891fb1-e8a9-4ba4-a8d7-a156e3019fb7/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b891fb1-e8a9-4ba4-a8d7-a156e3019fb7/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.krebs.4.prop1-func-interl.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b891fb1-e8a9-4ba4-a8d7-a156e3019fb7/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b891fb1-e8a9-4ba4-a8d7-a156e3019fb7/bin/utaipan-7li7fVZpFI --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 64bit --witnessprinter.graph.data.programhash cb96b9db29eb9339445c5d18c4526e95cdc940db6fcccba6ff8e2a771f6f2248 --- 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-5e519f3 [2022-11-03 02:39:17,391 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 02:39:17,394 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 02:39:17,428 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 02:39:17,429 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 02:39:17,431 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 02:39:17,433 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 02:39:17,434 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 02:39:17,436 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 02:39:17,437 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 02:39:17,438 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 02:39:17,440 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 02:39:17,440 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 02:39:17,445 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 02:39:17,446 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 02:39:17,447 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 02:39:17,448 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 02:39:17,449 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 02:39:17,451 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 02:39:17,452 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 02:39:17,454 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 02:39:17,460 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 02:39:17,464 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 02:39:17,465 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 02:39:17,474 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 02:39:17,474 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 02:39:17,475 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 02:39:17,476 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 02:39:17,476 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 02:39:17,477 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 02:39:17,478 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 02:39:17,478 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 02:39:17,479 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 02:39:17,480 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 02:39:17,481 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 02:39:17,482 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 02:39:17,482 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 02:39:17,483 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 02:39:17,483 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 02:39:17,484 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 02:39:17,490 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 02:39:17,492 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b891fb1-e8a9-4ba4-a8d7-a156e3019fb7/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-03 02:39:17,538 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 02:39:17,538 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 02:39:17,538 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 02:39:17,539 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 02:39:17,539 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 02:39:17,540 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 02:39:17,540 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 02:39:17,540 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 02:39:17,540 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 02:39:17,541 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 02:39:17,541 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 02:39:17,541 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 02:39:17,541 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 02:39:17,542 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 02:39:17,542 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 02:39:17,542 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 02:39:17,543 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 02:39:17,543 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 02:39:17,544 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 02:39:17,544 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 02:39:17,544 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 02:39:17,546 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 02:39:17,546 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 02:39:17,547 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 02:39:17,547 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 02:39:17,547 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 02:39:17,548 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 02:39:17,548 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 02:39:17,549 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 02:39:17,549 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:39:17,549 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 02:39:17,550 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 02:39:17,550 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 02:39:17,550 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 02:39:17,551 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 02:39:17,551 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 02:39:17,552 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 02:39:17,552 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 02:39:17,554 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_8b891fb1-e8a9-4ba4-a8d7-a156e3019fb7/bin/utaipan-7li7fVZpFI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b891fb1-e8a9-4ba4-a8d7-a156e3019fb7/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cb96b9db29eb9339445c5d18c4526e95cdc940db6fcccba6ff8e2a771f6f2248 [2022-11-03 02:39:17,879 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 02:39:17,923 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 02:39:17,925 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 02:39:17,926 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 02:39:17,928 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 02:39:17,929 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b891fb1-e8a9-4ba4-a8d7-a156e3019fb7/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.krebs.4.prop1-func-interl.c [2022-11-03 02:39:18,008 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b891fb1-e8a9-4ba4-a8d7-a156e3019fb7/bin/utaipan-7li7fVZpFI/data/0537812c9/147d587bdcdb4619b7c729ff434b7f81/FLAG956843ceb [2022-11-03 02:39:18,604 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 02:39:18,605 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b891fb1-e8a9-4ba4-a8d7-a156e3019fb7/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.krebs.4.prop1-func-interl.c [2022-11-03 02:39:18,638 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b891fb1-e8a9-4ba4-a8d7-a156e3019fb7/bin/utaipan-7li7fVZpFI/data/0537812c9/147d587bdcdb4619b7c729ff434b7f81/FLAG956843ceb [2022-11-03 02:39:18,863 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b891fb1-e8a9-4ba4-a8d7-a156e3019fb7/bin/utaipan-7li7fVZpFI/data/0537812c9/147d587bdcdb4619b7c729ff434b7f81 [2022-11-03 02:39:18,866 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 02:39:18,867 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 02:39:18,871 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 02:39:18,871 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 02:39:18,875 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 02:39:18,876 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:39:18" (1/1) ... [2022-11-03 02:39:18,878 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3479a69e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:39:18, skipping insertion in model container [2022-11-03 02:39:18,878 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:39:18" (1/1) ... [2022-11-03 02:39:18,885 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 02:39:18,964 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:39:19,225 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b891fb1-e8a9-4ba4-a8d7-a156e3019fb7/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.krebs.4.prop1-func-interl.c[1014,1027] [2022-11-03 02:39:19,645 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:39:19,653 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 02:39:19,663 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b891fb1-e8a9-4ba4-a8d7-a156e3019fb7/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.krebs.4.prop1-func-interl.c[1014,1027] [2022-11-03 02:39:19,891 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:39:19,902 INFO L208 MainTranslator]: Completed translation [2022-11-03 02:39:19,903 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:39:19 WrapperNode [2022-11-03 02:39:19,903 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 02:39:19,904 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 02:39:19,904 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 02:39:19,904 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 02:39:19,911 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:39:19" (1/1) ... [2022-11-03 02:39:20,010 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:39:19" (1/1) ... [2022-11-03 02:39:20,258 INFO L138 Inliner]: procedures = 11, calls = 3, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 2112 [2022-11-03 02:39:20,259 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 02:39:20,259 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 02:39:20,260 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 02:39:20,260 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 02:39:20,270 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:39:19" (1/1) ... [2022-11-03 02:39:20,270 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:39:19" (1/1) ... [2022-11-03 02:39:20,311 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:39:19" (1/1) ... [2022-11-03 02:39:20,311 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:39:19" (1/1) ... [2022-11-03 02:39:20,434 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:39:19" (1/1) ... [2022-11-03 02:39:20,441 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:39:19" (1/1) ... [2022-11-03 02:39:20,457 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:39:19" (1/1) ... [2022-11-03 02:39:20,476 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:39:19" (1/1) ... [2022-11-03 02:39:20,513 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 02:39:20,514 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 02:39:20,514 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 02:39:20,515 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 02:39:20,515 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:39:19" (1/1) ... [2022-11-03 02:39:20,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:39:20,535 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b891fb1-e8a9-4ba4-a8d7-a156e3019fb7/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:39:20,549 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b891fb1-e8a9-4ba4-a8d7-a156e3019fb7/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 02:39:20,553 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b891fb1-e8a9-4ba4-a8d7-a156e3019fb7/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 02:39:20,590 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 02:39:20,590 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 02:39:21,281 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 02:39:21,298 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 02:42:27,042 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 02:42:46,053 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 02:42:46,053 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-03 02:42:46,055 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:42:46 BoogieIcfgContainer [2022-11-03 02:42:46,055 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 02:42:46,058 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 02:42:46,058 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 02:42:46,061 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 02:42:46,062 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 02:39:18" (1/3) ... [2022-11-03 02:42:46,062 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67206803 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:42:46, skipping insertion in model container [2022-11-03 02:42:46,063 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:39:19" (2/3) ... [2022-11-03 02:42:46,063 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67206803 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:42:46, skipping insertion in model container [2022-11-03 02:42:46,063 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:42:46" (3/3) ... [2022-11-03 02:42:46,065 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.krebs.4.prop1-func-interl.c [2022-11-03 02:42:46,084 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 02:42:46,084 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 02:42:46,130 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 02:42:46,137 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;@4a1f9d37, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 02:42:46,137 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 02:42:46,141 INFO L276 IsEmpty]: Start isEmpty. Operand has 7 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:42:46,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-03 02:42:46,147 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:42:46,148 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-03 02:42:46,149 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:42:46,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:42:46,154 INFO L85 PathProgramCache]: Analyzing trace with hash 13505351, now seen corresponding path program 1 times [2022-11-03 02:42:46,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:42:46,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118101443] [2022-11-03 02:42:46,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:42:46,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:42:46,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-03 02:42:46,680 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-03 02:42:46,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-03 02:42:46,936 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-03 02:42:46,938 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-03 02:42:46,939 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-03 02:42:46,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 02:42:46,946 INFO L444 BasicCegarLoop]: Path program histogram: [1] [2022-11-03 02:42:46,952 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-03 02:42:46,997 WARN L320 BoogieBacktranslator]: Removing null node from list of ATEs: ATE program state null [2022-11-03 02:42:47,019 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.11 02:42:47 BoogieIcfgContainer [2022-11-03 02:42:47,019 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-03 02:42:47,022 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-03 02:42:47,022 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-03 02:42:47,022 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-03 02:42:47,023 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:42:46" (3/4) ... [2022-11-03 02:42:47,026 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-11-03 02:42:47,026 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-03 02:42:47,029 INFO L158 Benchmark]: Toolchain (without parser) took 208159.93ms. Allocated memory was 96.5MB in the beginning and 2.9GB in the end (delta: 2.8GB). Free memory was 59.4MB in the beginning and 1.5GB in the end (delta: -1.5GB). Peak memory consumption was 1.3GB. Max. memory is 16.1GB. [2022-11-03 02:42:47,029 INFO L158 Benchmark]: CDTParser took 0.26ms. Allocated memory is still 96.5MB. Free memory was 68.2MB in the beginning and 68.2MB in the end (delta: 28.1kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 02:42:47,030 INFO L158 Benchmark]: CACSL2BoogieTranslator took 1032.53ms. Allocated memory was 96.5MB in the beginning and 117.4MB in the end (delta: 21.0MB). Free memory was 59.2MB in the beginning and 69.5MB in the end (delta: -10.3MB). Peak memory consumption was 29.3MB. Max. memory is 16.1GB. [2022-11-03 02:42:47,031 INFO L158 Benchmark]: Boogie Procedure Inliner took 354.78ms. Allocated memory is still 117.4MB. Free memory was 69.5MB in the beginning and 53.3MB in the end (delta: 16.2MB). Peak memory consumption was 40.2MB. Max. memory is 16.1GB. [2022-11-03 02:42:47,036 INFO L158 Benchmark]: Boogie Preprocessor took 254.24ms. Allocated memory is still 117.4MB. Free memory was 53.3MB in the beginning and 44.3MB in the end (delta: 9.0MB). Peak memory consumption was 23.7MB. Max. memory is 16.1GB. [2022-11-03 02:42:47,037 INFO L158 Benchmark]: RCFGBuilder took 205541.04ms. Allocated memory was 117.4MB in the beginning and 2.9GB in the end (delta: 2.7GB). Free memory was 44.0MB in the beginning and 1.6GB in the end (delta: -1.5GB). Peak memory consumption was 1.4GB. Max. memory is 16.1GB. [2022-11-03 02:42:47,039 INFO L158 Benchmark]: TraceAbstraction took 961.81ms. Allocated memory is still 2.9GB. Free memory was 1.6GB in the beginning and 1.5GB in the end (delta: 77.6MB). Peak memory consumption was 77.6MB. Max. memory is 16.1GB. [2022-11-03 02:42:47,039 INFO L158 Benchmark]: Witness Printer took 4.83ms. Allocated memory is still 2.9GB. Free memory was 1.5GB in the beginning and 1.5GB in the end (delta: 2.0kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-03 02:42:47,047 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26ms. Allocated memory is still 96.5MB. Free memory was 68.2MB in the beginning and 68.2MB in the end (delta: 28.1kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 1032.53ms. Allocated memory was 96.5MB in the beginning and 117.4MB in the end (delta: 21.0MB). Free memory was 59.2MB in the beginning and 69.5MB in the end (delta: -10.3MB). Peak memory consumption was 29.3MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 354.78ms. Allocated memory is still 117.4MB. Free memory was 69.5MB in the beginning and 53.3MB in the end (delta: 16.2MB). Peak memory consumption was 40.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 254.24ms. Allocated memory is still 117.4MB. Free memory was 53.3MB in the beginning and 44.3MB in the end (delta: 9.0MB). Peak memory consumption was 23.7MB. Max. memory is 16.1GB. * RCFGBuilder took 205541.04ms. Allocated memory was 117.4MB in the beginning and 2.9GB in the end (delta: 2.7GB). Free memory was 44.0MB in the beginning and 1.6GB in the end (delta: -1.5GB). Peak memory consumption was 1.4GB. Max. memory is 16.1GB. * TraceAbstraction took 961.81ms. Allocated memory is still 2.9GB. Free memory was 1.6GB in the beginning and 1.5GB in the end (delta: 77.6MB). Peak memory consumption was 77.6MB. Max. memory is 16.1GB. * Witness Printer took 4.83ms. Allocated memory is still 2.9GB. Free memory was 1.5GB in the beginning and 1.5GB in the end (delta: 2.0kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 20]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of bitwiseComplement at line 251, overapproximation of bitwiseOr at line 246, overapproximation of bitwiseAnd at line 202. Possible FailurePath: [L25] const SORT_1 mask_SORT_1 = (SORT_1)-1 >> (sizeof(SORT_1) * 8 - 1); [L26] const SORT_1 msb_SORT_1 = (SORT_1)1 << (1 - 1); [L28] const SORT_2 mask_SORT_2 = (SORT_2)-1 >> (sizeof(SORT_2) * 8 - 8); [L29] const SORT_2 msb_SORT_2 = (SORT_2)1 << (8 - 1); [L31] const SORT_3 mask_SORT_3 = (SORT_3)-1 >> (sizeof(SORT_3) * 8 - 24); [L32] const SORT_3 msb_SORT_3 = (SORT_3)1 << (24 - 1); [L34] const SORT_4 mask_SORT_4 = (SORT_4)-1 >> (sizeof(SORT_4) * 8 - 32); [L35] const SORT_4 msb_SORT_4 = (SORT_4)1 << (32 - 1); [L37] const SORT_2 var_5 = 0; [L38] const SORT_1 var_30 = 0; [L39] const SORT_3 var_91 = 0; [L40] const SORT_4 var_93 = 80; [L41] const SORT_2 var_97 = 15; [L42] const SORT_4 var_101 = 1; [L43] const SORT_2 var_107 = 4; [L44] const SORT_4 var_109 = 2; [L45] const SORT_2 var_133 = 12; [L46] const SORT_2 var_160 = 2; [L47] const SORT_2 var_225 = 10; [L49] SORT_1 input_98; [L50] SORT_1 input_108; [L51] SORT_1 input_114; [L52] SORT_1 input_138; [L53] SORT_1 input_141; [L54] SORT_1 input_142; [L55] SORT_1 input_143; [L56] SORT_1 input_144; [L57] SORT_1 input_145; [L58] SORT_1 input_146; [L59] SORT_1 input_167; [L60] SORT_1 input_168; [L61] SORT_1 input_169; [L62] SORT_1 input_194; [L63] SORT_1 input_198; [L64] SORT_1 input_199; [L65] SORT_1 input_245; [L66] SORT_1 input_248; [L67] SORT_1 input_249; [L68] SORT_1 input_272; [L69] SORT_1 input_293; [L70] SORT_1 input_314; [L72] SORT_2 state_6 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L73] SORT_2 state_8 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L74] SORT_2 state_10 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L75] SORT_2 state_12 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L76] SORT_2 state_14 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L77] SORT_2 state_16 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L78] SORT_2 state_18 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L79] SORT_2 state_20 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L80] SORT_2 state_22 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L81] SORT_2 state_24 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L82] SORT_2 state_26 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L83] SORT_2 state_28 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L84] SORT_1 state_31 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L85] SORT_1 state_33 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L86] SORT_1 state_35 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L87] SORT_1 state_37 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L88] SORT_1 state_39 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L89] SORT_1 state_41 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L90] SORT_1 state_43 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L91] SORT_1 state_45 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L92] SORT_1 state_47 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L93] SORT_1 state_49 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L94] SORT_1 state_51 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L95] SORT_1 state_53 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L96] SORT_1 state_55 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L97] SORT_1 state_57 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L98] SORT_1 state_59 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L99] SORT_1 state_61 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L100] SORT_1 state_63 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L101] SORT_1 state_65 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L102] SORT_1 state_67 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L103] SORT_1 state_69 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L104] SORT_1 state_71 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L105] SORT_1 state_73 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L106] SORT_1 state_75 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L107] SORT_1 state_77 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L108] SORT_1 state_79 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L109] SORT_1 state_81 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L110] SORT_1 state_83 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L111] SORT_1 state_85 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L112] SORT_1 state_87 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L113] SORT_1 state_89 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L115] SORT_2 init_7_arg_1 = var_5; [L116] state_6 = init_7_arg_1 [L117] SORT_2 init_9_arg_1 = var_5; [L118] state_8 = init_9_arg_1 [L119] SORT_2 init_11_arg_1 = var_5; [L120] state_10 = init_11_arg_1 [L121] SORT_2 init_13_arg_1 = var_5; [L122] state_12 = init_13_arg_1 [L123] SORT_2 init_15_arg_1 = var_5; [L124] state_14 = init_15_arg_1 [L125] SORT_2 init_17_arg_1 = var_5; [L126] state_16 = init_17_arg_1 [L127] SORT_2 init_19_arg_1 = var_5; [L128] state_18 = init_19_arg_1 [L129] SORT_2 init_21_arg_1 = var_5; [L130] state_20 = init_21_arg_1 [L131] SORT_2 init_23_arg_1 = var_5; [L132] state_22 = init_23_arg_1 [L133] SORT_2 init_25_arg_1 = var_5; [L134] state_24 = init_25_arg_1 [L135] SORT_2 init_27_arg_1 = var_5; [L136] state_26 = init_27_arg_1 [L137] SORT_2 init_29_arg_1 = var_5; [L138] state_28 = init_29_arg_1 [L139] SORT_1 init_32_arg_1 = var_30; [L140] state_31 = init_32_arg_1 [L141] SORT_1 init_34_arg_1 = var_30; [L142] state_33 = init_34_arg_1 [L143] SORT_1 init_36_arg_1 = var_30; [L144] state_35 = init_36_arg_1 [L145] SORT_1 init_38_arg_1 = var_30; [L146] state_37 = init_38_arg_1 [L147] SORT_1 init_40_arg_1 = var_30; [L148] state_39 = init_40_arg_1 [L149] SORT_1 init_42_arg_1 = var_30; [L150] state_41 = init_42_arg_1 [L151] SORT_1 init_44_arg_1 = var_30; [L152] state_43 = init_44_arg_1 [L153] SORT_1 init_46_arg_1 = var_30; [L154] state_45 = init_46_arg_1 [L155] SORT_1 init_48_arg_1 = var_30; [L156] state_47 = init_48_arg_1 [L157] SORT_1 init_50_arg_1 = var_30; [L158] state_49 = init_50_arg_1 [L159] SORT_1 init_52_arg_1 = var_30; [L160] state_51 = init_52_arg_1 [L161] SORT_1 init_54_arg_1 = var_30; [L162] state_53 = init_54_arg_1 [L163] SORT_1 init_56_arg_1 = var_30; [L164] state_55 = init_56_arg_1 [L165] SORT_1 init_58_arg_1 = var_30; [L166] state_57 = init_58_arg_1 [L167] SORT_1 init_60_arg_1 = var_30; [L168] state_59 = init_60_arg_1 [L169] SORT_1 init_62_arg_1 = var_30; [L170] state_61 = init_62_arg_1 [L171] SORT_1 init_64_arg_1 = var_30; [L172] state_63 = init_64_arg_1 [L173] SORT_1 init_66_arg_1 = var_30; [L174] state_65 = init_66_arg_1 [L175] SORT_1 init_68_arg_1 = var_30; [L176] state_67 = init_68_arg_1 [L177] SORT_1 init_70_arg_1 = var_30; [L178] state_69 = init_70_arg_1 [L179] SORT_1 init_72_arg_1 = var_30; [L180] state_71 = init_72_arg_1 [L181] SORT_1 init_74_arg_1 = var_30; [L182] state_73 = init_74_arg_1 [L183] SORT_1 init_76_arg_1 = var_30; [L184] state_75 = init_76_arg_1 [L185] SORT_1 init_78_arg_1 = var_30; [L186] state_77 = init_78_arg_1 [L187] SORT_1 init_80_arg_1 = var_30; [L188] state_79 = init_80_arg_1 [L189] SORT_1 init_82_arg_1 = var_30; [L190] state_81 = init_82_arg_1 [L191] SORT_1 init_84_arg_1 = var_30; [L192] state_83 = init_84_arg_1 [L193] SORT_1 init_86_arg_1 = var_30; [L194] state_85 = init_86_arg_1 [L195] SORT_1 init_88_arg_1 = var_30; [L196] state_87 = init_88_arg_1 [L197] SORT_1 init_90_arg_1 = var_30; [L198] state_89 = init_90_arg_1 VAL [init_11_arg_1=0, init_13_arg_1=0, init_15_arg_1=0, init_17_arg_1=0, init_19_arg_1=0, init_21_arg_1=0, init_23_arg_1=0, init_25_arg_1=0, init_27_arg_1=0, init_29_arg_1=0, init_32_arg_1=0, init_34_arg_1=0, init_36_arg_1=0, init_38_arg_1=0, init_40_arg_1=0, init_42_arg_1=0, init_44_arg_1=0, init_46_arg_1=0, init_48_arg_1=0, init_50_arg_1=0, init_52_arg_1=0, init_54_arg_1=0, init_56_arg_1=0, init_58_arg_1=0, init_60_arg_1=0, init_62_arg_1=0, init_64_arg_1=0, init_66_arg_1=0, init_68_arg_1=0, init_70_arg_1=0, init_72_arg_1=0, init_74_arg_1=0, init_76_arg_1=0, init_78_arg_1=0, init_7_arg_1=0, init_80_arg_1=0, init_82_arg_1=0, init_84_arg_1=0, init_86_arg_1=0, init_88_arg_1=0, init_90_arg_1=0, init_9_arg_1=0, mask_SORT_1=1, mask_SORT_2=255, mask_SORT_3=4294967295, mask_SORT_4=4294967295, msb_SORT_1=1, msb_SORT_2=128, msb_SORT_3=8388608, msb_SORT_4=2147483648, state_10=0, state_12=0, state_14=0, state_16=0, state_18=0, state_20=0, state_22=0, state_24=0, state_26=0, state_28=0, state_31=0, state_33=0, state_35=0, state_37=0, state_39=0, state_41=0, state_43=0, state_45=0, state_47=0, state_49=0, state_51=0, state_53=0, state_55=0, state_57=0, state_59=0, state_6=0, state_61=0, state_63=0, state_65=0, state_67=0, state_69=0, state_71=0, state_73=0, state_75=0, state_77=0, state_79=0, state_8=0, state_81=0, state_83=0, state_85=0, state_87=0, state_89=0, var_101=1, var_107=4, var_109=2, var_133=12, var_160=2, var_225=10, var_30=0, var_5=0, var_91=0, var_93=80, var_97=15] [L201] input_98 = __VERIFIER_nondet_uchar() [L202] input_98 = input_98 & mask_SORT_1 [L203] input_108 = __VERIFIER_nondet_uchar() [L204] input_108 = input_108 & mask_SORT_1 [L205] input_114 = __VERIFIER_nondet_uchar() [L206] input_114 = input_114 & mask_SORT_1 [L207] input_138 = __VERIFIER_nondet_uchar() [L208] input_138 = input_138 & mask_SORT_1 [L209] input_141 = __VERIFIER_nondet_uchar() [L210] input_141 = input_141 & mask_SORT_1 [L211] input_142 = __VERIFIER_nondet_uchar() [L212] input_142 = input_142 & mask_SORT_1 [L213] input_143 = __VERIFIER_nondet_uchar() [L214] input_143 = input_143 & mask_SORT_1 [L215] input_144 = __VERIFIER_nondet_uchar() [L216] input_144 = input_144 & mask_SORT_1 [L217] input_145 = __VERIFIER_nondet_uchar() [L218] input_145 = input_145 & mask_SORT_1 [L219] input_146 = __VERIFIER_nondet_uchar() [L220] input_146 = input_146 & mask_SORT_1 [L221] input_167 = __VERIFIER_nondet_uchar() [L222] input_167 = input_167 & mask_SORT_1 [L223] input_168 = __VERIFIER_nondet_uchar() [L224] input_168 = input_168 & mask_SORT_1 [L225] input_169 = __VERIFIER_nondet_uchar() [L226] input_169 = input_169 & mask_SORT_1 [L227] input_194 = __VERIFIER_nondet_uchar() [L228] input_194 = input_194 & mask_SORT_1 [L229] input_198 = __VERIFIER_nondet_uchar() [L230] input_198 = input_198 & mask_SORT_1 [L231] input_199 = __VERIFIER_nondet_uchar() [L232] input_199 = input_199 & mask_SORT_1 [L233] input_245 = __VERIFIER_nondet_uchar() [L234] input_245 = input_245 & mask_SORT_1 [L235] input_248 = __VERIFIER_nondet_uchar() [L236] input_248 = input_248 & mask_SORT_1 [L237] input_249 = __VERIFIER_nondet_uchar() [L238] input_249 = input_249 & mask_SORT_1 [L239] input_272 = __VERIFIER_nondet_uchar() [L240] input_293 = __VERIFIER_nondet_uchar() [L241] input_314 = __VERIFIER_nondet_uchar() [L244] SORT_3 var_92_arg_0 = var_91; [L245] SORT_2 var_92_arg_1 = state_28; [L246] SORT_4 var_92 = ((SORT_4)var_92_arg_0 << 8) | var_92_arg_1; [L247] var_92 = var_92 & mask_SORT_4 [L248] SORT_4 var_94_arg_0 = var_92; [L249] SORT_4 var_94_arg_1 = var_93; [L250] SORT_1 var_94 = var_94_arg_0 <= var_94_arg_1; [L251] SORT_1 var_95_arg_0 = ~state_89; [L252] var_95_arg_0 = var_95_arg_0 & mask_SORT_1 [L253] SORT_1 var_95_arg_1 = ~var_94; [L254] var_95_arg_1 = var_95_arg_1 & mask_SORT_1 [L255] SORT_1 var_95 = var_95_arg_0 & var_95_arg_1; [L256] var_95 = var_95 & mask_SORT_1 [L257] SORT_1 bad_96_arg_0 = var_95; [L258] CALL __VERIFIER_assert(!(bad_96_arg_0)) [L20] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L20] reach_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 7 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 0.8s, OverallIterations: 1, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: , PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=7occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 4 NumberOfCodeBlocks, 4 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2022-11-03 02:42:47,108 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b891fb1-e8a9-4ba4-a8d7-a156e3019fb7/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### 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_8b891fb1-e8a9-4ba4-a8d7-a156e3019fb7/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b891fb1-e8a9-4ba4-a8d7-a156e3019fb7/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b891fb1-e8a9-4ba4-a8d7-a156e3019fb7/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b891fb1-e8a9-4ba4-a8d7-a156e3019fb7/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.krebs.4.prop1-func-interl.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b891fb1-e8a9-4ba4-a8d7-a156e3019fb7/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b891fb1-e8a9-4ba4-a8d7-a156e3019fb7/bin/utaipan-7li7fVZpFI --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 64bit --witnessprinter.graph.data.programhash cb96b9db29eb9339445c5d18c4526e95cdc940db6fcccba6ff8e2a771f6f2248 --- 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-5e519f3 [2022-11-03 02:42:49,555 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 02:42:49,557 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 02:42:49,610 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 02:42:49,611 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 02:42:49,615 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 02:42:49,618 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 02:42:49,622 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 02:42:49,629 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 02:42:49,632 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 02:42:49,633 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 02:42:49,636 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 02:42:49,636 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 02:42:49,643 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 02:42:49,644 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 02:42:49,645 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 02:42:49,647 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 02:42:49,648 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 02:42:49,652 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 02:42:49,655 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 02:42:49,663 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 02:42:49,665 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 02:42:49,666 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 02:42:49,668 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 02:42:49,672 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 02:42:49,674 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 02:42:49,674 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 02:42:49,675 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 02:42:49,677 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 02:42:49,678 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 02:42:49,678 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 02:42:49,679 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 02:42:49,681 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 02:42:49,682 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 02:42:49,683 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 02:42:49,683 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 02:42:49,684 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 02:42:49,684 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 02:42:49,684 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 02:42:49,686 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 02:42:49,687 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 02:42:49,688 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b891fb1-e8a9-4ba4-a8d7-a156e3019fb7/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2022-11-03 02:42:49,733 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 02:42:49,733 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 02:42:49,733 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 02:42:49,734 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 02:42:49,734 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 02:42:49,735 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 02:42:49,735 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 02:42:49,735 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 02:42:49,735 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 02:42:49,736 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 02:42:49,736 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 02:42:49,736 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 02:42:49,737 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 02:42:49,737 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 02:42:49,737 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 02:42:49,738 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 02:42:49,738 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 02:42:49,738 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-03 02:42:49,738 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-03 02:42:49,738 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-03 02:42:49,739 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 02:42:49,739 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 02:42:49,739 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 02:42:49,739 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 02:42:49,740 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-03 02:42:49,740 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 02:42:49,740 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:42:49,740 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 02:42:49,741 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 02:42:49,741 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 02:42:49,741 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-03 02:42:49,741 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-03 02:42:49,741 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 02:42:49,742 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 02:42:49,742 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-03 02:42:49,742 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_8b891fb1-e8a9-4ba4-a8d7-a156e3019fb7/bin/utaipan-7li7fVZpFI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b891fb1-e8a9-4ba4-a8d7-a156e3019fb7/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cb96b9db29eb9339445c5d18c4526e95cdc940db6fcccba6ff8e2a771f6f2248 [2022-11-03 02:42:50,166 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 02:42:50,200 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 02:42:50,203 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 02:42:50,204 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 02:42:50,205 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 02:42:50,206 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b891fb1-e8a9-4ba4-a8d7-a156e3019fb7/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.krebs.4.prop1-func-interl.c [2022-11-03 02:42:50,279 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b891fb1-e8a9-4ba4-a8d7-a156e3019fb7/bin/utaipan-7li7fVZpFI/data/4c2e19dc0/2c685ee0e34246138e2af393779e2df2/FLAG9d5f35129 [2022-11-03 02:42:51,020 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 02:42:51,021 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b891fb1-e8a9-4ba4-a8d7-a156e3019fb7/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.krebs.4.prop1-func-interl.c [2022-11-03 02:42:51,038 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b891fb1-e8a9-4ba4-a8d7-a156e3019fb7/bin/utaipan-7li7fVZpFI/data/4c2e19dc0/2c685ee0e34246138e2af393779e2df2/FLAG9d5f35129 [2022-11-03 02:42:51,297 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b891fb1-e8a9-4ba4-a8d7-a156e3019fb7/bin/utaipan-7li7fVZpFI/data/4c2e19dc0/2c685ee0e34246138e2af393779e2df2 [2022-11-03 02:42:51,304 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 02:42:51,306 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 02:42:51,307 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 02:42:51,307 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 02:42:51,311 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 02:42:51,312 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:42:51" (1/1) ... [2022-11-03 02:42:51,313 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@24cc7d0e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:42:51, skipping insertion in model container [2022-11-03 02:42:51,313 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:42:51" (1/1) ... [2022-11-03 02:42:51,320 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 02:42:51,396 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:42:51,554 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b891fb1-e8a9-4ba4-a8d7-a156e3019fb7/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.krebs.4.prop1-func-interl.c[1014,1027] [2022-11-03 02:42:52,005 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:42:52,009 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 02:42:52,020 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b891fb1-e8a9-4ba4-a8d7-a156e3019fb7/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.krebs.4.prop1-func-interl.c[1014,1027] [2022-11-03 02:42:52,201 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:42:52,214 INFO L208 MainTranslator]: Completed translation [2022-11-03 02:42:52,214 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:42:52 WrapperNode [2022-11-03 02:42:52,215 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 02:42:52,215 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 02:42:52,216 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 02:42:52,216 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 02:42:52,221 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:42:52" (1/1) ... [2022-11-03 02:42:52,272 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:42:52" (1/1) ... [2022-11-03 02:42:52,408 INFO L138 Inliner]: procedures = 11, calls = 3, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 2112 [2022-11-03 02:42:52,415 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 02:42:52,416 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 02:42:52,416 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 02:42:52,417 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 02:42:52,426 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:42:52" (1/1) ... [2022-11-03 02:42:52,426 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:42:52" (1/1) ... [2022-11-03 02:42:52,439 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:42:52" (1/1) ... [2022-11-03 02:42:52,440 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:42:52" (1/1) ... [2022-11-03 02:42:52,470 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:42:52" (1/1) ... [2022-11-03 02:42:52,478 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:42:52" (1/1) ... [2022-11-03 02:42:52,485 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:42:52" (1/1) ... [2022-11-03 02:42:52,493 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:42:52" (1/1) ... [2022-11-03 02:42:52,508 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 02:42:52,509 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 02:42:52,509 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 02:42:52,509 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 02:42:52,510 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:42:52" (1/1) ... [2022-11-03 02:42:52,516 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:42:52,528 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b891fb1-e8a9-4ba4-a8d7-a156e3019fb7/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:42:52,550 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b891fb1-e8a9-4ba4-a8d7-a156e3019fb7/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 02:42:52,579 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b891fb1-e8a9-4ba4-a8d7-a156e3019fb7/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 02:42:52,594 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 02:42:52,594 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 02:42:53,126 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 02:42:53,128 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 02:42:55,520 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 02:42:55,530 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 02:42:55,530 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-03 02:42:55,533 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:42:55 BoogieIcfgContainer [2022-11-03 02:42:55,533 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 02:42:55,536 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 02:42:55,536 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 02:42:55,540 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 02:42:55,540 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 02:42:51" (1/3) ... [2022-11-03 02:42:55,541 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fb31133 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:42:55, skipping insertion in model container [2022-11-03 02:42:55,541 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:42:52" (2/3) ... [2022-11-03 02:42:55,542 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fb31133 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:42:55, skipping insertion in model container [2022-11-03 02:42:55,542 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:42:55" (3/3) ... [2022-11-03 02:42:55,543 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.krebs.4.prop1-func-interl.c [2022-11-03 02:42:55,564 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 02:42:55,564 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 02:42:55,646 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 02:42:55,655 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;@102dc5e3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 02:42:55,655 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 02:42:55,664 INFO L276 IsEmpty]: Start isEmpty. Operand has 123 states, 121 states have (on average 1.4958677685950412) internal successors, (181), 122 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:42:55,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-03 02:42:55,674 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:42:55,675 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-03 02:42:55,676 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:42:55,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:42:55,683 INFO L85 PathProgramCache]: Analyzing trace with hash 28698761, now seen corresponding path program 1 times [2022-11-03 02:42:55,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:42:55,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [90985265] [2022-11-03 02:42:55,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:42:55,701 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:42:55,701 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b891fb1-e8a9-4ba4-a8d7-a156e3019fb7/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:42:55,708 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b891fb1-e8a9-4ba4-a8d7-a156e3019fb7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:42:55,751 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b891fb1-e8a9-4ba4-a8d7-a156e3019fb7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-03 02:42:56,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:42:56,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-03 02:42:56,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:42:56,312 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:42:56,312 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:42:56,313 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:42:56,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [90985265] [2022-11-03 02:42:56,314 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [90985265] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:42:56,314 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:42:56,314 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:42:56,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359187671] [2022-11-03 02:42:56,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:42:56,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:42:56,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:42:56,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:42:56,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:42:56,360 INFO L87 Difference]: Start difference. First operand has 123 states, 121 states have (on average 1.4958677685950412) internal successors, (181), 122 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:42:56,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:42:56,775 INFO L93 Difference]: Finished difference Result 356 states and 534 transitions. [2022-11-03 02:42:56,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:42:56,778 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-03 02:42:56,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:42:56,789 INFO L225 Difference]: With dead ends: 356 [2022-11-03 02:42:56,789 INFO L226 Difference]: Without dead ends: 235 [2022-11-03 02:42:56,792 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:42:56,796 INFO L413 NwaCegarLoop]: 161 mSDtfsCounter, 339 mSDsluCounter, 332 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 339 SdHoareTripleChecker+Valid, 493 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:42:56,797 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [339 Valid, 493 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 02:42:56,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2022-11-03 02:42:56,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 121. [2022-11-03 02:42:56,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 1.475) internal successors, (177), 120 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:42:56,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 177 transitions. [2022-11-03 02:42:56,857 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 177 transitions. Word has length 5 [2022-11-03 02:42:56,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:42:56,857 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 177 transitions. [2022-11-03 02:42:56,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:42:56,858 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 177 transitions. [2022-11-03 02:42:56,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-11-03 02:42:56,863 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:42:56,863 INFO L195 NwaCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1] [2022-11-03 02:42:56,887 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b891fb1-e8a9-4ba4-a8d7-a156e3019fb7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-11-03 02:42:57,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b891fb1-e8a9-4ba4-a8d7-a156e3019fb7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:42:57,076 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:42:57,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:42:57,077 INFO L85 PathProgramCache]: Analyzing trace with hash -1504819055, now seen corresponding path program 1 times [2022-11-03 02:42:57,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:42:57,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [164428739] [2022-11-03 02:42:57,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:42:57,081 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:42:57,081 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b891fb1-e8a9-4ba4-a8d7-a156e3019fb7/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:42:57,082 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b891fb1-e8a9-4ba4-a8d7-a156e3019fb7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:42:57,119 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b891fb1-e8a9-4ba4-a8d7-a156e3019fb7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-03 02:42:58,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:42:58,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 1776 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 02:42:58,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:42:58,394 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:42:58,395 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:42:58,395 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:42:58,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [164428739] [2022-11-03 02:42:58,396 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [164428739] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:42:58,396 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:42:58,397 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 02:42:58,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031112355] [2022-11-03 02:42:58,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:42:58,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:42:58,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:42:58,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:42:58,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:42:58,408 INFO L87 Difference]: Start difference. First operand 121 states and 177 transitions. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:42:58,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:42:58,589 INFO L93 Difference]: Finished difference Result 242 states and 356 transitions. [2022-11-03 02:42:58,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:42:58,590 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2022-11-03 02:42:58,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:42:58,591 INFO L225 Difference]: With dead ends: 242 [2022-11-03 02:42:58,591 INFO L226 Difference]: Without dead ends: 125 [2022-11-03 02:42:58,592 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:42:58,593 INFO L413 NwaCegarLoop]: 169 mSDtfsCounter, 2 mSDsluCounter, 497 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 666 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 19 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:42:58,593 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 666 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 19 Unchecked, 0.1s Time] [2022-11-03 02:42:58,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-11-03 02:42:58,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2022-11-03 02:42:58,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 1.467741935483871) internal successors, (182), 124 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:42:58,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 182 transitions. [2022-11-03 02:42:58,607 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 182 transitions. Word has length 120 [2022-11-03 02:42:58,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:42:58,608 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 182 transitions. [2022-11-03 02:42:58,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:42:58,613 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 182 transitions. [2022-11-03 02:42:58,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-11-03 02:42:58,616 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:42:58,617 INFO L195 NwaCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1] [2022-11-03 02:42:58,645 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b891fb1-e8a9-4ba4-a8d7-a156e3019fb7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-03 02:42:58,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b891fb1-e8a9-4ba4-a8d7-a156e3019fb7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:42:58,841 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:42:58,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:42:58,841 INFO L85 PathProgramCache]: Analyzing trace with hash 1063003279, now seen corresponding path program 1 times [2022-11-03 02:42:58,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:42:58,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [753263090] [2022-11-03 02:42:58,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:42:58,843 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:42:58,844 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b891fb1-e8a9-4ba4-a8d7-a156e3019fb7/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:42:58,850 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b891fb1-e8a9-4ba4-a8d7-a156e3019fb7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:42:58,859 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b891fb1-e8a9-4ba4-a8d7-a156e3019fb7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-03 02:42:59,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:42:59,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 1776 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 02:42:59,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:43:00,347 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:43:00,348 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:43:00,348 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:43:00,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [753263090] [2022-11-03 02:43:00,351 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [753263090] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:43:00,351 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:43:00,351 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 02:43:00,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311655309] [2022-11-03 02:43:00,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:43:00,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:43:00,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:43:00,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:43:00,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:43:00,357 INFO L87 Difference]: Start difference. First operand 125 states and 182 transitions. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:43:00,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:43:00,512 INFO L93 Difference]: Finished difference Result 290 states and 427 transitions. [2022-11-03 02:43:00,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:43:00,514 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2022-11-03 02:43:00,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:43:00,516 INFO L225 Difference]: With dead ends: 290 [2022-11-03 02:43:00,516 INFO L226 Difference]: Without dead ends: 173 [2022-11-03 02:43:00,516 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:43:00,517 INFO L413 NwaCegarLoop]: 169 mSDtfsCounter, 84 mSDsluCounter, 830 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 999 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 20 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:43:00,518 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 999 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 20 Unchecked, 0.1s Time] [2022-11-03 02:43:00,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2022-11-03 02:43:00,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2022-11-03 02:43:00,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 1.4709302325581395) internal successors, (253), 172 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:43:00,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 253 transitions. [2022-11-03 02:43:00,527 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 253 transitions. Word has length 120 [2022-11-03 02:43:00,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:43:00,528 INFO L495 AbstractCegarLoop]: Abstraction has 173 states and 253 transitions. [2022-11-03 02:43:00,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:43:00,529 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 253 transitions. [2022-11-03 02:43:00,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-11-03 02:43:00,537 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:43:00,538 INFO L195 NwaCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1] [2022-11-03 02:43:00,567 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b891fb1-e8a9-4ba4-a8d7-a156e3019fb7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-11-03 02:43:00,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b891fb1-e8a9-4ba4-a8d7-a156e3019fb7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:43:00,761 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:43:00,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:43:00,761 INFO L85 PathProgramCache]: Analyzing trace with hash -2015810291, now seen corresponding path program 1 times [2022-11-03 02:43:00,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:43:00,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1698198609] [2022-11-03 02:43:00,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:43:00,764 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:43:00,764 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b891fb1-e8a9-4ba4-a8d7-a156e3019fb7/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:43:00,765 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b891fb1-e8a9-4ba4-a8d7-a156e3019fb7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:43:00,770 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b891fb1-e8a9-4ba4-a8d7-a156e3019fb7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-11-03 02:43:01,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:43:01,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 1776 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 02:43:01,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:43:01,925 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:43:01,925 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:43:01,925 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:43:01,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1698198609] [2022-11-03 02:43:01,925 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1698198609] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:43:01,926 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:43:01,926 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 02:43:01,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034862612] [2022-11-03 02:43:01,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:43:01,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:43:01,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:43:01,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:43:01,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:43:01,927 INFO L87 Difference]: Start difference. First operand 173 states and 253 transitions. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:43:02,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:43:02,095 INFO L93 Difference]: Finished difference Result 470 states and 692 transitions. [2022-11-03 02:43:02,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:43:02,096 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2022-11-03 02:43:02,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:43:02,098 INFO L225 Difference]: With dead ends: 470 [2022-11-03 02:43:02,098 INFO L226 Difference]: Without dead ends: 353 [2022-11-03 02:43:02,099 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:43:02,100 INFO L413 NwaCegarLoop]: 258 mSDtfsCounter, 284 mSDsluCounter, 895 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 1153 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 17 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:43:02,100 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [284 Valid, 1153 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 17 Unchecked, 0.1s Time] [2022-11-03 02:43:02,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2022-11-03 02:43:02,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 237. [2022-11-03 02:43:02,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 236 states have (on average 1.4703389830508475) internal successors, (347), 236 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:43:02,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 347 transitions. [2022-11-03 02:43:02,111 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 347 transitions. Word has length 120 [2022-11-03 02:43:02,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:43:02,112 INFO L495 AbstractCegarLoop]: Abstraction has 237 states and 347 transitions. [2022-11-03 02:43:02,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:43:02,112 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 347 transitions. [2022-11-03 02:43:02,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-11-03 02:43:02,114 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:43:02,114 INFO L195 NwaCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1] [2022-11-03 02:43:02,142 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b891fb1-e8a9-4ba4-a8d7-a156e3019fb7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-11-03 02:43:02,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b891fb1-e8a9-4ba4-a8d7-a156e3019fb7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:43:02,337 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:43:02,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:43:02,338 INFO L85 PathProgramCache]: Analyzing trace with hash -754893041, now seen corresponding path program 1 times [2022-11-03 02:43:02,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:43:02,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [354176134] [2022-11-03 02:43:02,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:43:02,340 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:43:02,340 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b891fb1-e8a9-4ba4-a8d7-a156e3019fb7/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:43:02,341 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b891fb1-e8a9-4ba4-a8d7-a156e3019fb7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:43:02,348 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b891fb1-e8a9-4ba4-a8d7-a156e3019fb7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-11-03 02:43:03,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:43:03,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 1776 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 02:43:03,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:43:03,455 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:43:03,456 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:43:03,456 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:43:03,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [354176134] [2022-11-03 02:43:03,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [354176134] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:43:03,456 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:43:03,456 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 02:43:03,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206704511] [2022-11-03 02:43:03,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:43:03,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:43:03,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:43:03,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:43:03,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:43:03,458 INFO L87 Difference]: Start difference. First operand 237 states and 347 transitions. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:43:03,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:43:03,735 INFO L93 Difference]: Finished difference Result 524 states and 771 transitions. [2022-11-03 02:43:03,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 02:43:03,736 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2022-11-03 02:43:03,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:43:03,738 INFO L225 Difference]: With dead ends: 524 [2022-11-03 02:43:03,738 INFO L226 Difference]: Without dead ends: 407 [2022-11-03 02:43:03,739 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:43:03,740 INFO L413 NwaCegarLoop]: 258 mSDtfsCounter, 422 mSDsluCounter, 1279 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 422 SdHoareTripleChecker+Valid, 1537 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 37 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:43:03,740 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [422 Valid, 1537 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 35 Invalid, 0 Unknown, 37 Unchecked, 0.2s Time] [2022-11-03 02:43:03,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2022-11-03 02:43:03,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 239. [2022-11-03 02:43:03,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 238 states have (on average 1.4663865546218486) internal successors, (349), 238 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:43:03,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 349 transitions. [2022-11-03 02:43:03,756 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 349 transitions. Word has length 120 [2022-11-03 02:43:03,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:43:03,756 INFO L495 AbstractCegarLoop]: Abstraction has 239 states and 349 transitions. [2022-11-03 02:43:03,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:43:03,757 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 349 transitions. [2022-11-03 02:43:03,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-11-03 02:43:03,758 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:43:03,758 INFO L195 NwaCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1] [2022-11-03 02:43:03,779 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b891fb1-e8a9-4ba4-a8d7-a156e3019fb7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-11-03 02:43:03,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b891fb1-e8a9-4ba4-a8d7-a156e3019fb7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:43:03,959 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:43:03,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:43:03,959 INFO L85 PathProgramCache]: Analyzing trace with hash 631892369, now seen corresponding path program 1 times [2022-11-03 02:43:03,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:43:03,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [636550038] [2022-11-03 02:43:03,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:43:03,961 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:43:03,961 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b891fb1-e8a9-4ba4-a8d7-a156e3019fb7/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:43:03,962 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b891fb1-e8a9-4ba4-a8d7-a156e3019fb7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:43:03,963 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b891fb1-e8a9-4ba4-a8d7-a156e3019fb7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-11-03 02:43:04,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:43:04,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 1776 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 02:43:04,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:43:05,131 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:43:05,131 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:43:05,132 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:43:05,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [636550038] [2022-11-03 02:43:05,132 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [636550038] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:43:05,132 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:43:05,132 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 02:43:05,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784560519] [2022-11-03 02:43:05,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:43:05,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:43:05,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:43:05,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:43:05,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:43:05,133 INFO L87 Difference]: Start difference. First operand 239 states and 349 transitions. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:43:05,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:43:05,422 INFO L93 Difference]: Finished difference Result 524 states and 770 transitions. [2022-11-03 02:43:05,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 02:43:05,423 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2022-11-03 02:43:05,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:43:05,425 INFO L225 Difference]: With dead ends: 524 [2022-11-03 02:43:05,425 INFO L226 Difference]: Without dead ends: 407 [2022-11-03 02:43:05,425 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:43:05,426 INFO L413 NwaCegarLoop]: 273 mSDtfsCounter, 493 mSDsluCounter, 898 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 493 SdHoareTripleChecker+Valid, 1171 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 23 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:43:05,426 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [493 Valid, 1171 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 23 Unchecked, 0.2s Time] [2022-11-03 02:43:05,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2022-11-03 02:43:05,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 249. [2022-11-03 02:43:05,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 248 states have (on average 1.4637096774193548) internal successors, (363), 248 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:43:05,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 363 transitions. [2022-11-03 02:43:05,435 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 363 transitions. Word has length 120 [2022-11-03 02:43:05,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:43:05,435 INFO L495 AbstractCegarLoop]: Abstraction has 249 states and 363 transitions. [2022-11-03 02:43:05,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:43:05,436 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 363 transitions. [2022-11-03 02:43:05,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-11-03 02:43:05,437 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:43:05,438 INFO L195 NwaCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1] [2022-11-03 02:43:05,462 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b891fb1-e8a9-4ba4-a8d7-a156e3019fb7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-11-03 02:43:05,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b891fb1-e8a9-4ba4-a8d7-a156e3019fb7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:43:05,661 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:43:05,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:43:05,662 INFO L85 PathProgramCache]: Analyzing trace with hash 1525378707, now seen corresponding path program 1 times [2022-11-03 02:43:05,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:43:05,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [848949218] [2022-11-03 02:43:05,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:43:05,664 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:43:05,664 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b891fb1-e8a9-4ba4-a8d7-a156e3019fb7/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:43:05,665 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b891fb1-e8a9-4ba4-a8d7-a156e3019fb7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:43:05,667 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b891fb1-e8a9-4ba4-a8d7-a156e3019fb7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-11-03 02:43:06,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:43:06,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 1776 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 02:43:06,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:43:06,971 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:43:06,971 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:43:06,971 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:43:06,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [848949218] [2022-11-03 02:43:06,972 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [848949218] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:43:06,972 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:43:06,972 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 02:43:06,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476546547] [2022-11-03 02:43:06,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:43:06,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:43:06,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:43:06,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:43:06,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:43:06,974 INFO L87 Difference]: Start difference. First operand 249 states and 363 transitions. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:43:07,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:43:07,126 INFO L93 Difference]: Finished difference Result 420 states and 614 transitions. [2022-11-03 02:43:07,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:43:07,128 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2022-11-03 02:43:07,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:43:07,129 INFO L225 Difference]: With dead ends: 420 [2022-11-03 02:43:07,129 INFO L226 Difference]: Without dead ends: 303 [2022-11-03 02:43:07,129 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:43:07,130 INFO L413 NwaCegarLoop]: 168 mSDtfsCounter, 130 mSDsluCounter, 778 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 946 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 14 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:43:07,131 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 946 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 14 Unchecked, 0.1s Time] [2022-11-03 02:43:07,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2022-11-03 02:43:07,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 303. [2022-11-03 02:43:07,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 302 states have (on average 1.4569536423841059) internal successors, (440), 302 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:43:07,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 440 transitions. [2022-11-03 02:43:07,138 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 440 transitions. Word has length 120 [2022-11-03 02:43:07,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:43:07,139 INFO L495 AbstractCegarLoop]: Abstraction has 303 states and 440 transitions. [2022-11-03 02:43:07,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:43:07,139 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 440 transitions. [2022-11-03 02:43:07,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-11-03 02:43:07,141 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:43:07,141 INFO L195 NwaCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1] [2022-11-03 02:43:07,170 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b891fb1-e8a9-4ba4-a8d7-a156e3019fb7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-11-03 02:43:07,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b891fb1-e8a9-4ba4-a8d7-a156e3019fb7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:43:07,365 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:43:07,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:43:07,365 INFO L85 PathProgramCache]: Analyzing trace with hash -1925583087, now seen corresponding path program 1 times [2022-11-03 02:43:07,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:43:07,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [346914146] [2022-11-03 02:43:07,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:43:07,367 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:43:07,367 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b891fb1-e8a9-4ba4-a8d7-a156e3019fb7/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:43:07,369 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b891fb1-e8a9-4ba4-a8d7-a156e3019fb7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:43:07,408 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b891fb1-e8a9-4ba4-a8d7-a156e3019fb7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-11-03 02:43:08,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:43:08,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 1776 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 02:43:08,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:43:08,635 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:43:08,635 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:43:08,635 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:43:08,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [346914146] [2022-11-03 02:43:08,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [346914146] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:43:08,636 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:43:08,636 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 02:43:08,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366239601] [2022-11-03 02:43:08,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:43:08,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:43:08,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:43:08,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:43:08,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:43:08,637 INFO L87 Difference]: Start difference. First operand 303 states and 440 transitions. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:43:08,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:43:08,886 INFO L93 Difference]: Finished difference Result 644 states and 942 transitions. [2022-11-03 02:43:08,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 02:43:08,887 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2022-11-03 02:43:08,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:43:08,889 INFO L225 Difference]: With dead ends: 644 [2022-11-03 02:43:08,889 INFO L226 Difference]: Without dead ends: 527 [2022-11-03 02:43:08,890 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:43:08,891 INFO L413 NwaCegarLoop]: 327 mSDtfsCounter, 412 mSDsluCounter, 890 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 412 SdHoareTripleChecker+Valid, 1217 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 15 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:43:08,891 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [412 Valid, 1217 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 15 Unchecked, 0.2s Time] [2022-11-03 02:43:08,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 527 states. [2022-11-03 02:43:08,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 527 to 403. [2022-11-03 02:43:08,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 402 states have (on average 1.4577114427860696) internal successors, (586), 402 states have internal predecessors, (586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:43:08,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 586 transitions. [2022-11-03 02:43:08,900 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 586 transitions. Word has length 120 [2022-11-03 02:43:08,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:43:08,901 INFO L495 AbstractCegarLoop]: Abstraction has 403 states and 586 transitions. [2022-11-03 02:43:08,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:43:08,901 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 586 transitions. [2022-11-03 02:43:08,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-11-03 02:43:08,903 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:43:08,903 INFO L195 NwaCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1] [2022-11-03 02:43:08,932 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b891fb1-e8a9-4ba4-a8d7-a156e3019fb7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-11-03 02:43:09,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b891fb1-e8a9-4ba4-a8d7-a156e3019fb7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:43:09,121 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:43:09,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:43:09,121 INFO L85 PathProgramCache]: Analyzing trace with hash -1224518509, now seen corresponding path program 1 times [2022-11-03 02:43:09,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:43:09,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [730583250] [2022-11-03 02:43:09,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:43:09,123 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:43:09,123 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b891fb1-e8a9-4ba4-a8d7-a156e3019fb7/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:43:09,123 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b891fb1-e8a9-4ba4-a8d7-a156e3019fb7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:43:09,125 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b891fb1-e8a9-4ba4-a8d7-a156e3019fb7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-11-03 02:43:09,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:43:09,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 1776 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-03 02:43:09,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:43:11,898 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:43:11,898 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:43:20,055 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:43:20,055 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:43:20,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [730583250] [2022-11-03 02:43:20,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [730583250] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:43:20,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [636527142] [2022-11-03 02:43:20,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:43:20,056 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:43:20,056 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b891fb1-e8a9-4ba4-a8d7-a156e3019fb7/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:43:20,057 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b891fb1-e8a9-4ba4-a8d7-a156e3019fb7/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:43:20,058 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b891fb1-e8a9-4ba4-a8d7-a156e3019fb7/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2022-11-03 02:43:21,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:43:21,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 1776 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-03 02:43:21,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:43:23,245 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:43:23,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:44:22,679 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:44:22,679 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [636527142] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:44:22,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807591303] [2022-11-03 02:44:22,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:44:22,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:44:22,680 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b891fb1-e8a9-4ba4-a8d7-a156e3019fb7/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:44:22,686 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b891fb1-e8a9-4ba4-a8d7-a156e3019fb7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:44:22,717 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b891fb1-e8a9-4ba4-a8d7-a156e3019fb7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-03 02:44:23,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:44:23,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 1776 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-03 02:44:23,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:44:28,622 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:44:28,623 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:44:35,921 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:44:35,921 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1807591303] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:44:35,921 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:44:35,922 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 9, 9] total 36 [2022-11-03 02:44:35,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881565373] [2022-11-03 02:44:35,922 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:44:35,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-03 02:44:35,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:44:35,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-03 02:44:35,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=1053, Unknown=25, NotChecked=0, Total=1260 [2022-11-03 02:44:35,927 INFO L87 Difference]: Start difference. First operand 403 states and 586 transitions. Second operand has 36 states, 36 states have (on average 16.333333333333332) internal successors, (588), 36 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:44:38,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:44:38,105 INFO L93 Difference]: Finished difference Result 841 states and 1226 transitions. [2022-11-03 02:44:38,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-03 02:44:38,105 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 16.333333333333332) internal successors, (588), 36 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2022-11-03 02:44:38,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:44:38,109 INFO L225 Difference]: With dead ends: 841 [2022-11-03 02:44:38,109 INFO L226 Difference]: Without dead ends: 839 [2022-11-03 02:44:38,110 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 728 GetRequests, 682 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 553 ImplicationChecksByTransitivity, 72.4s TimeCoverageRelationStatistics Valid=346, Invalid=1699, Unknown=25, NotChecked=0, Total=2070 [2022-11-03 02:44:38,113 INFO L413 NwaCegarLoop]: 151 mSDtfsCounter, 1491 mSDsluCounter, 3242 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1491 SdHoareTripleChecker+Valid, 3393 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 54 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:44:38,113 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1491 Valid, 3393 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 54 Unchecked, 0.0s Time] [2022-11-03 02:44:38,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 839 states. [2022-11-03 02:44:38,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 839 to 792. [2022-11-03 02:44:38,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 792 states, 791 states have (on average 1.4601769911504425) internal successors, (1155), 791 states have internal predecessors, (1155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:44:38,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 792 states to 792 states and 1155 transitions. [2022-11-03 02:44:38,130 INFO L78 Accepts]: Start accepts. Automaton has 792 states and 1155 transitions. Word has length 120 [2022-11-03 02:44:38,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:44:38,131 INFO L495 AbstractCegarLoop]: Abstraction has 792 states and 1155 transitions. [2022-11-03 02:44:38,131 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 16.333333333333332) internal successors, (588), 36 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:44:38,131 INFO L276 IsEmpty]: Start isEmpty. Operand 792 states and 1155 transitions. [2022-11-03 02:44:38,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-11-03 02:44:38,133 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:44:38,134 INFO L195 NwaCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1] [2022-11-03 02:44:38,173 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b891fb1-e8a9-4ba4-a8d7-a156e3019fb7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-03 02:44:38,365 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b891fb1-e8a9-4ba4-a8d7-a156e3019fb7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-11-03 02:44:38,561 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b891fb1-e8a9-4ba4-a8d7-a156e3019fb7/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 0 [2022-11-03 02:44:38,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b891fb1-e8a9-4ba4-a8d7-a156e3019fb7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b891fb1-e8a9-4ba4-a8d7-a156e3019fb7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b891fb1-e8a9-4ba4-a8d7-a156e3019fb7/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:44:38,749 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:44:38,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:44:38,750 INFO L85 PathProgramCache]: Analyzing trace with hash -1810794731, now seen corresponding path program 1 times [2022-11-03 02:44:38,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:44:38,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1900422295] [2022-11-03 02:44:38,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:44:38,751 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:44:38,751 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b891fb1-e8a9-4ba4-a8d7-a156e3019fb7/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:44:38,752 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b891fb1-e8a9-4ba4-a8d7-a156e3019fb7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:44:38,757 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b891fb1-e8a9-4ba4-a8d7-a156e3019fb7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-11-03 02:44:39,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:44:39,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 1776 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 02:44:39,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:44:40,006 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:44:40,006 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:44:40,006 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:44:40,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1900422295] [2022-11-03 02:44:40,007 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1900422295] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:44:40,007 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:44:40,007 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 02:44:40,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034364022] [2022-11-03 02:44:40,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:44:40,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:44:40,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:44:40,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:44:40,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:44:40,008 INFO L87 Difference]: Start difference. First operand 792 states and 1155 transitions. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:44:40,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:44:40,381 INFO L93 Difference]: Finished difference Result 1785 states and 2590 transitions. [2022-11-03 02:44:40,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 02:44:40,383 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2022-11-03 02:44:40,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:44:40,387 INFO L225 Difference]: With dead ends: 1785 [2022-11-03 02:44:40,388 INFO L226 Difference]: Without dead ends: 1530 [2022-11-03 02:44:40,389 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:44:40,389 INFO L413 NwaCegarLoop]: 424 mSDtfsCounter, 416 mSDsluCounter, 1123 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 416 SdHoareTripleChecker+Valid, 1547 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 14 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:44:40,390 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [416 Valid, 1547 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 14 Unchecked, 0.3s Time] [2022-11-03 02:44:40,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1530 states. [2022-11-03 02:44:40,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1530 to 888. [2022-11-03 02:44:40,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 888 states, 887 states have (on average 1.4577226606538896) internal successors, (1293), 887 states have internal predecessors, (1293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:44:40,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 888 states to 888 states and 1293 transitions. [2022-11-03 02:44:40,412 INFO L78 Accepts]: Start accepts. Automaton has 888 states and 1293 transitions. Word has length 120 [2022-11-03 02:44:40,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:44:40,413 INFO L495 AbstractCegarLoop]: Abstraction has 888 states and 1293 transitions. [2022-11-03 02:44:40,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:44:40,413 INFO L276 IsEmpty]: Start isEmpty. Operand 888 states and 1293 transitions. [2022-11-03 02:44:40,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-11-03 02:44:40,415 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:44:40,416 INFO L195 NwaCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1] [2022-11-03 02:44:40,439 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b891fb1-e8a9-4ba4-a8d7-a156e3019fb7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-11-03 02:44:40,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b891fb1-e8a9-4ba4-a8d7-a156e3019fb7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:44:40,629 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:44:40,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:44:40,629 INFO L85 PathProgramCache]: Analyzing trace with hash 2066775959, now seen corresponding path program 1 times [2022-11-03 02:44:40,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:44:40,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1159487423] [2022-11-03 02:44:40,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:44:40,631 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:44:40,631 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b891fb1-e8a9-4ba4-a8d7-a156e3019fb7/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:44:40,632 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b891fb1-e8a9-4ba4-a8d7-a156e3019fb7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:44:40,634 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b891fb1-e8a9-4ba4-a8d7-a156e3019fb7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-11-03 02:44:41,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:44:41,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 1776 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-03 02:44:41,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:44:45,102 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:44:45,102 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:44:54,549 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:44:54,549 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:44:54,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1159487423] [2022-11-03 02:44:54,549 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1159487423] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:44:54,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1828640189] [2022-11-03 02:44:54,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:44:54,549 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:44:54,550 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b891fb1-e8a9-4ba4-a8d7-a156e3019fb7/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:44:54,550 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b891fb1-e8a9-4ba4-a8d7-a156e3019fb7/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:44:54,553 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b891fb1-e8a9-4ba4-a8d7-a156e3019fb7/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2022-11-03 02:44:55,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:44:56,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 1776 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-03 02:44:56,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:44:59,298 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:44:59,298 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:45:57,875 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:45:57,876 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1828640189] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:45:57,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794309689] [2022-11-03 02:45:57,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:45:57,876 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:45:57,876 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b891fb1-e8a9-4ba4-a8d7-a156e3019fb7/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:45:57,879 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b891fb1-e8a9-4ba4-a8d7-a156e3019fb7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:45:57,879 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b891fb1-e8a9-4ba4-a8d7-a156e3019fb7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-03 02:45:58,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:45:58,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 1776 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-03 02:45:58,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:46:03,965 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:46:03,966 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:46:12,276 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:46:12,277 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [794309689] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:46:12,277 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:46:12,277 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 9, 9] total 36 [2022-11-03 02:46:12,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834180530] [2022-11-03 02:46:12,278 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:46:12,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-03 02:46:12,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:46:12,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-03 02:46:12,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=1053, Unknown=28, NotChecked=0, Total=1260 [2022-11-03 02:46:12,280 INFO L87 Difference]: Start difference. First operand 888 states and 1293 transitions. Second operand has 36 states, 36 states have (on average 16.333333333333332) internal successors, (588), 36 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:46:14,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:46:14,388 INFO L93 Difference]: Finished difference Result 1594 states and 2317 transitions. [2022-11-03 02:46:14,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-03 02:46:14,393 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 16.333333333333332) internal successors, (588), 36 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2022-11-03 02:46:14,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:46:14,400 INFO L225 Difference]: With dead ends: 1594 [2022-11-03 02:46:14,401 INFO L226 Difference]: Without dead ends: 1592 [2022-11-03 02:46:14,402 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 728 GetRequests, 682 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 549 ImplicationChecksByTransitivity, 72.7s TimeCoverageRelationStatistics Valid=341, Invalid=1701, Unknown=28, NotChecked=0, Total=2070 [2022-11-03 02:46:14,403 INFO L413 NwaCegarLoop]: 151 mSDtfsCounter, 2080 mSDsluCounter, 3403 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2080 SdHoareTripleChecker+Valid, 3554 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 42 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:46:14,403 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2080 Valid, 3554 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 42 Unchecked, 0.0s Time] [2022-11-03 02:46:14,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1592 states. [2022-11-03 02:46:14,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1592 to 1498. [2022-11-03 02:46:14,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1498 states, 1497 states have (on average 1.454241816967268) internal successors, (2177), 1497 states have internal predecessors, (2177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:46:14,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1498 states to 1498 states and 2177 transitions. [2022-11-03 02:46:14,442 INFO L78 Accepts]: Start accepts. Automaton has 1498 states and 2177 transitions. Word has length 120 [2022-11-03 02:46:14,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:46:14,443 INFO L495 AbstractCegarLoop]: Abstraction has 1498 states and 2177 transitions. [2022-11-03 02:46:14,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 16.333333333333332) internal successors, (588), 36 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:46:14,444 INFO L276 IsEmpty]: Start isEmpty. Operand 1498 states and 2177 transitions. [2022-11-03 02:46:14,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-11-03 02:46:14,447 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:46:14,447 INFO L195 NwaCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1] [2022-11-03 02:46:14,489 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b891fb1-e8a9-4ba4-a8d7-a156e3019fb7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-03 02:46:14,680 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b891fb1-e8a9-4ba4-a8d7-a156e3019fb7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-11-03 02:46:14,872 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b891fb1-e8a9-4ba4-a8d7-a156e3019fb7/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (15)] Forceful destruction successful, exit code 0 [2022-11-03 02:46:15,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b891fb1-e8a9-4ba4-a8d7-a156e3019fb7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b891fb1-e8a9-4ba4-a8d7-a156e3019fb7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b891fb1-e8a9-4ba4-a8d7-a156e3019fb7/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:46:15,061 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:46:15,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:46:15,062 INFO L85 PathProgramCache]: Analyzing trace with hash 380596121, now seen corresponding path program 1 times [2022-11-03 02:46:15,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:46:15,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [243859394] [2022-11-03 02:46:15,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:46:15,063 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:46:15,063 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b891fb1-e8a9-4ba4-a8d7-a156e3019fb7/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:46:15,064 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b891fb1-e8a9-4ba4-a8d7-a156e3019fb7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:46:15,065 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b891fb1-e8a9-4ba4-a8d7-a156e3019fb7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-11-03 02:46:15,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:46:15,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 1776 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 02:46:15,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:46:16,555 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:46:16,556 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:46:16,556 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:46:16,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [243859394] [2022-11-03 02:46:16,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [243859394] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:46:16,556 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:46:16,556 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 02:46:16,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102747787] [2022-11-03 02:46:16,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:46:16,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:46:16,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:46:16,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:46:16,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:46:16,557 INFO L87 Difference]: Start difference. First operand 1498 states and 2177 transitions. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:46:16,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:46:16,953 INFO L93 Difference]: Finished difference Result 2416 states and 3519 transitions. [2022-11-03 02:46:16,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 02:46:16,955 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2022-11-03 02:46:16,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:46:16,961 INFO L225 Difference]: With dead ends: 2416 [2022-11-03 02:46:16,961 INFO L226 Difference]: Without dead ends: 2140 [2022-11-03 02:46:16,963 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:46:16,963 INFO L413 NwaCegarLoop]: 379 mSDtfsCounter, 314 mSDsluCounter, 1321 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 314 SdHoareTripleChecker+Valid, 1700 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 14 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:46:16,963 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [314 Valid, 1700 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 14 Unchecked, 0.3s Time] [2022-11-03 02:46:16,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2140 states. [2022-11-03 02:46:16,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2140 to 1662. [2022-11-03 02:46:16,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1662 states, 1661 states have (on average 1.4479229379891632) internal successors, (2405), 1661 states have internal predecessors, (2405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:46:17,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1662 states to 1662 states and 2405 transitions. [2022-11-03 02:46:17,004 INFO L78 Accepts]: Start accepts. Automaton has 1662 states and 2405 transitions. Word has length 120 [2022-11-03 02:46:17,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:46:17,004 INFO L495 AbstractCegarLoop]: Abstraction has 1662 states and 2405 transitions. [2022-11-03 02:46:17,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:46:17,005 INFO L276 IsEmpty]: Start isEmpty. Operand 1662 states and 2405 transitions. [2022-11-03 02:46:17,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-11-03 02:46:17,008 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:46:17,008 INFO L195 NwaCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1] [2022-11-03 02:46:17,036 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b891fb1-e8a9-4ba4-a8d7-a156e3019fb7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (17)] Ended with exit code 0 [2022-11-03 02:46:17,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b891fb1-e8a9-4ba4-a8d7-a156e3019fb7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:46:17,232 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:46:17,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:46:17,232 INFO L85 PathProgramCache]: Analyzing trace with hash 308209563, now seen corresponding path program 1 times [2022-11-03 02:46:17,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:46:17,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2114087701] [2022-11-03 02:46:17,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:46:17,234 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:46:17,234 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b891fb1-e8a9-4ba4-a8d7-a156e3019fb7/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:46:17,235 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b891fb1-e8a9-4ba4-a8d7-a156e3019fb7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:46:17,236 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b891fb1-e8a9-4ba4-a8d7-a156e3019fb7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-11-03 02:46:18,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:46:18,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 1776 conjuncts, 56 conjunts are in the unsatisfiable core [2022-11-03 02:46:18,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:46:22,142 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:46:22,142 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:46:31,575 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:46:31,576 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:46:31,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2114087701] [2022-11-03 02:46:31,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2114087701] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:46:31,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1510108459] [2022-11-03 02:46:31,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:46:31,576 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:46:31,576 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b891fb1-e8a9-4ba4-a8d7-a156e3019fb7/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:46:31,577 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b891fb1-e8a9-4ba4-a8d7-a156e3019fb7/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:46:31,579 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b891fb1-e8a9-4ba4-a8d7-a156e3019fb7/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2022-11-03 02:46:33,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:46:33,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 1776 conjuncts, 56 conjunts are in the unsatisfiable core [2022-11-03 02:46:33,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:46:37,012 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:46:37,012 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:47:37,194 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:47:37,194 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1510108459] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:47:37,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432573840] [2022-11-03 02:47:37,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:47:37,195 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:47:37,195 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b891fb1-e8a9-4ba4-a8d7-a156e3019fb7/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:47:37,197 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b891fb1-e8a9-4ba4-a8d7-a156e3019fb7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:47:37,201 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b891fb1-e8a9-4ba4-a8d7-a156e3019fb7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-03 02:47:37,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:47:37,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 1776 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-03 02:47:38,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:47:44,451 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:47:44,451 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:47:52,691 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:47:52,692 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1432573840] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:47:52,692 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:47:52,692 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 9, 9] total 36 [2022-11-03 02:47:52,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727841349] [2022-11-03 02:47:52,693 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:47:52,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-03 02:47:52,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:47:52,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-03 02:47:52,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=1053, Unknown=25, NotChecked=0, Total=1260 [2022-11-03 02:47:52,696 INFO L87 Difference]: Start difference. First operand 1662 states and 2405 transitions. Second operand has 36 states, 36 states have (on average 16.333333333333332) internal successors, (588), 36 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:47:55,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:47:55,334 INFO L93 Difference]: Finished difference Result 3444 states and 4987 transitions. [2022-11-03 02:47:55,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-03 02:47:55,335 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 16.333333333333332) internal successors, (588), 36 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2022-11-03 02:47:55,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:47:55,345 INFO L225 Difference]: With dead ends: 3444 [2022-11-03 02:47:55,345 INFO L226 Difference]: Without dead ends: 3442 [2022-11-03 02:47:55,347 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 727 GetRequests, 681 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 552 ImplicationChecksByTransitivity, 73.2s TimeCoverageRelationStatistics Valid=348, Invalid=1697, Unknown=25, NotChecked=0, Total=2070 [2022-11-03 02:47:55,347 INFO L413 NwaCegarLoop]: 149 mSDtfsCounter, 1561 mSDsluCounter, 3558 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1561 SdHoareTripleChecker+Valid, 3707 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 64 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:47:55,348 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1561 Valid, 3707 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 64 Unchecked, 0.0s Time] [2022-11-03 02:47:55,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3442 states. [2022-11-03 02:47:55,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3442 to 3270. [2022-11-03 02:47:55,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3270 states, 3269 states have (on average 1.4478433771795656) internal successors, (4733), 3269 states have internal predecessors, (4733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:47:55,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3270 states to 3270 states and 4733 transitions. [2022-11-03 02:47:55,419 INFO L78 Accepts]: Start accepts. Automaton has 3270 states and 4733 transitions. Word has length 120 [2022-11-03 02:47:55,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:47:55,419 INFO L495 AbstractCegarLoop]: Abstraction has 3270 states and 4733 transitions. [2022-11-03 02:47:55,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 16.333333333333332) internal successors, (588), 36 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:47:55,420 INFO L276 IsEmpty]: Start isEmpty. Operand 3270 states and 4733 transitions. [2022-11-03 02:47:55,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-11-03 02:47:55,424 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:47:55,425 INFO L195 NwaCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1] [2022-11-03 02:47:55,449 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b891fb1-e8a9-4ba4-a8d7-a156e3019fb7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (18)] Ended with exit code 0 [2022-11-03 02:47:55,679 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b891fb1-e8a9-4ba4-a8d7-a156e3019fb7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-03 02:47:55,858 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b891fb1-e8a9-4ba4-a8d7-a156e3019fb7/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (19)] Ended with exit code 0 [2022-11-03 02:47:56,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b891fb1-e8a9-4ba4-a8d7-a156e3019fb7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b891fb1-e8a9-4ba4-a8d7-a156e3019fb7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b891fb1-e8a9-4ba4-a8d7-a156e3019fb7/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:47:56,049 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:47:56,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:47:56,050 INFO L85 PathProgramCache]: Analyzing trace with hash -575299427, now seen corresponding path program 1 times [2022-11-03 02:47:56,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:47:56,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [798905932] [2022-11-03 02:47:56,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:47:56,051 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:47:56,051 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b891fb1-e8a9-4ba4-a8d7-a156e3019fb7/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:47:56,052 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b891fb1-e8a9-4ba4-a8d7-a156e3019fb7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:47:56,060 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b891fb1-e8a9-4ba4-a8d7-a156e3019fb7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-11-03 02:47:56,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:47:56,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 1776 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 02:47:56,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:47:57,206 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:47:57,206 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:47:57,206 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:47:57,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [798905932] [2022-11-03 02:47:57,207 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [798905932] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:47:57,207 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:47:57,207 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 02:47:57,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52077545] [2022-11-03 02:47:57,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:47:57,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:47:57,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:47:57,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:47:57,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:47:57,208 INFO L87 Difference]: Start difference. First operand 3270 states and 4733 transitions. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:47:57,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:47:57,646 INFO L93 Difference]: Finished difference Result 8446 states and 12157 transitions. [2022-11-03 02:47:57,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 02:47:57,648 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2022-11-03 02:47:57,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:47:57,667 INFO L225 Difference]: With dead ends: 8446 [2022-11-03 02:47:57,667 INFO L226 Difference]: Without dead ends: 7100 [2022-11-03 02:47:57,670 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:47:57,671 INFO L413 NwaCegarLoop]: 437 mSDtfsCounter, 318 mSDsluCounter, 1653 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 318 SdHoareTripleChecker+Valid, 2090 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 30 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:47:57,671 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [318 Valid, 2090 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 30 Unchecked, 0.3s Time] [2022-11-03 02:47:57,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7100 states. [2022-11-03 02:47:57,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7100 to 3526. [2022-11-03 02:47:57,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3526 states, 3525 states have (on average 1.4470921985815604) internal successors, (5101), 3525 states have internal predecessors, (5101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:47:57,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3526 states to 3526 states and 5101 transitions. [2022-11-03 02:47:57,780 INFO L78 Accepts]: Start accepts. Automaton has 3526 states and 5101 transitions. Word has length 120 [2022-11-03 02:47:57,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:47:57,780 INFO L495 AbstractCegarLoop]: Abstraction has 3526 states and 5101 transitions. [2022-11-03 02:47:57,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:47:57,781 INFO L276 IsEmpty]: Start isEmpty. Operand 3526 states and 5101 transitions. [2022-11-03 02:47:57,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-11-03 02:47:57,788 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:47:57,788 INFO L195 NwaCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1] [2022-11-03 02:47:57,818 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b891fb1-e8a9-4ba4-a8d7-a156e3019fb7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-11-03 02:47:58,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b891fb1-e8a9-4ba4-a8d7-a156e3019fb7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:47:58,013 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:47:58,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:47:58,014 INFO L85 PathProgramCache]: Analyzing trace with hash 1808625311, now seen corresponding path program 1 times [2022-11-03 02:47:58,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:47:58,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1185811990] [2022-11-03 02:47:58,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:47:58,016 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:47:58,016 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b891fb1-e8a9-4ba4-a8d7-a156e3019fb7/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:47:58,017 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b891fb1-e8a9-4ba4-a8d7-a156e3019fb7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:47:58,077 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b891fb1-e8a9-4ba4-a8d7-a156e3019fb7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-11-03 02:47:58,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:47:58,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 1776 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 02:47:58,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:47:59,627 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:47:59,628 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:47:59,628 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:47:59,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1185811990] [2022-11-03 02:47:59,628 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1185811990] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:47:59,629 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:47:59,629 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 02:47:59,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512288969] [2022-11-03 02:47:59,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:47:59,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:47:59,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:47:59,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:47:59,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:47:59,631 INFO L87 Difference]: Start difference. First operand 3526 states and 5101 transitions. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:48:00,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:48:00,159 INFO L93 Difference]: Finished difference Result 6032 states and 8700 transitions. [2022-11-03 02:48:00,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 02:48:00,161 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2022-11-03 02:48:00,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:48:00,174 INFO L225 Difference]: With dead ends: 6032 [2022-11-03 02:48:00,174 INFO L226 Difference]: Without dead ends: 5400 [2022-11-03 02:48:00,176 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:48:00,177 INFO L413 NwaCegarLoop]: 385 mSDtfsCounter, 265 mSDsluCounter, 1499 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 265 SdHoareTripleChecker+Valid, 1884 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 29 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:48:00,177 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [265 Valid, 1884 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 29 Unchecked, 0.4s Time] [2022-11-03 02:48:00,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5400 states. [2022-11-03 02:48:00,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5400 to 4270. [2022-11-03 02:48:00,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4270 states, 4269 states have (on average 1.4375732021550713) internal successors, (6137), 4269 states have internal predecessors, (6137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:48:00,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4270 states to 4270 states and 6137 transitions. [2022-11-03 02:48:00,278 INFO L78 Accepts]: Start accepts. Automaton has 4270 states and 6137 transitions. Word has length 120 [2022-11-03 02:48:00,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:48:00,278 INFO L495 AbstractCegarLoop]: Abstraction has 4270 states and 6137 transitions. [2022-11-03 02:48:00,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:48:00,279 INFO L276 IsEmpty]: Start isEmpty. Operand 4270 states and 6137 transitions. [2022-11-03 02:48:00,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-11-03 02:48:00,287 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:48:00,287 INFO L195 NwaCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1] [2022-11-03 02:48:00,327 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b891fb1-e8a9-4ba4-a8d7-a156e3019fb7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-11-03 02:48:00,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b891fb1-e8a9-4ba4-a8d7-a156e3019fb7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:48:00,514 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:48:00,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:48:00,514 INFO L85 PathProgramCache]: Analyzing trace with hash -36741855, now seen corresponding path program 1 times [2022-11-03 02:48:00,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:48:00,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [332063338] [2022-11-03 02:48:00,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:48:00,516 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:48:00,516 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b891fb1-e8a9-4ba4-a8d7-a156e3019fb7/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:48:00,517 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b891fb1-e8a9-4ba4-a8d7-a156e3019fb7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:48:00,519 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b891fb1-e8a9-4ba4-a8d7-a156e3019fb7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-11-03 02:48:01,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:48:01,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 1776 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 02:48:01,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:48:02,229 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:48:02,229 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:48:02,229 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:48:02,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [332063338] [2022-11-03 02:48:02,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [332063338] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:48:02,230 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:48:02,230 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 02:48:02,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477421847] [2022-11-03 02:48:02,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:48:02,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:48:02,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:48:02,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:48:02,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:48:02,232 INFO L87 Difference]: Start difference. First operand 4270 states and 6137 transitions. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:48:02,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:48:02,641 INFO L93 Difference]: Finished difference Result 5614 states and 8097 transitions. [2022-11-03 02:48:02,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 02:48:02,643 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2022-11-03 02:48:02,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:48:02,660 INFO L225 Difference]: With dead ends: 5614 [2022-11-03 02:48:02,660 INFO L226 Difference]: Without dead ends: 5088 [2022-11-03 02:48:02,663 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:48:02,664 INFO L413 NwaCegarLoop]: 365 mSDtfsCounter, 311 mSDsluCounter, 1046 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 311 SdHoareTripleChecker+Valid, 1411 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 16 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:48:02,664 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [311 Valid, 1411 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 16 Unchecked, 0.3s Time] [2022-11-03 02:48:02,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5088 states. [2022-11-03 02:48:02,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5088 to 4418. [2022-11-03 02:48:02,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4418 states, 4417 states have (on average 1.434684174779262) internal successors, (6337), 4417 states have internal predecessors, (6337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:48:02,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4418 states to 4418 states and 6337 transitions. [2022-11-03 02:48:02,826 INFO L78 Accepts]: Start accepts. Automaton has 4418 states and 6337 transitions. Word has length 120 [2022-11-03 02:48:02,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:48:02,827 INFO L495 AbstractCegarLoop]: Abstraction has 4418 states and 6337 transitions. [2022-11-03 02:48:02,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:48:02,828 INFO L276 IsEmpty]: Start isEmpty. Operand 4418 states and 6337 transitions. [2022-11-03 02:48:02,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-11-03 02:48:02,836 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:48:02,837 INFO L195 NwaCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1] [2022-11-03 02:48:02,866 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b891fb1-e8a9-4ba4-a8d7-a156e3019fb7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2022-11-03 02:48:03,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b891fb1-e8a9-4ba4-a8d7-a156e3019fb7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:48:03,057 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:48:03,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:48:03,057 INFO L85 PathProgramCache]: Analyzing trace with hash 1886486179, now seen corresponding path program 1 times [2022-11-03 02:48:03,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:48:03,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1475848025] [2022-11-03 02:48:03,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:48:03,059 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:48:03,059 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b891fb1-e8a9-4ba4-a8d7-a156e3019fb7/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:48:03,060 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b891fb1-e8a9-4ba4-a8d7-a156e3019fb7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:48:03,064 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b891fb1-e8a9-4ba4-a8d7-a156e3019fb7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-11-03 02:48:03,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:48:03,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 1776 conjuncts, 56 conjunts are in the unsatisfiable core [2022-11-03 02:48:03,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:48:08,032 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:48:08,032 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:48:16,041 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:48:16,042 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:48:16,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1475848025] [2022-11-03 02:48:16,042 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1475848025] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:48:16,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2068945535] [2022-11-03 02:48:16,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:48:16,043 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:48:16,043 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b891fb1-e8a9-4ba4-a8d7-a156e3019fb7/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:48:16,044 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b891fb1-e8a9-4ba4-a8d7-a156e3019fb7/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:48:16,060 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b891fb1-e8a9-4ba4-a8d7-a156e3019fb7/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (25)] Waiting until timeout for monitored process [2022-11-03 02:48:17,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:48:17,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 1776 conjuncts, 56 conjunts are in the unsatisfiable core [2022-11-03 02:48:17,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:48:21,624 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:48:21,624 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:49:26,352 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:49:26,352 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2068945535] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:49:26,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188800394] [2022-11-03 02:49:26,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:49:26,353 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:49:26,353 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b891fb1-e8a9-4ba4-a8d7-a156e3019fb7/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:49:26,354 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b891fb1-e8a9-4ba4-a8d7-a156e3019fb7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:49:26,355 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b891fb1-e8a9-4ba4-a8d7-a156e3019fb7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-11-03 02:49:27,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:49:27,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 1776 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-03 02:49:27,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:49:32,923 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:49:32,923 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:49:41,091 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:49:41,092 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1188800394] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:49:41,092 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:49:41,092 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 9, 9] total 36 [2022-11-03 02:49:41,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639656357] [2022-11-03 02:49:41,092 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:49:41,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-03 02:49:41,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:49:41,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-03 02:49:41,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=1053, Unknown=28, NotChecked=0, Total=1260 [2022-11-03 02:49:41,095 INFO L87 Difference]: Start difference. First operand 4418 states and 6337 transitions. Second operand has 36 states, 36 states have (on average 16.333333333333332) internal successors, (588), 36 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:49:43,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:49:43,635 INFO L93 Difference]: Finished difference Result 7676 states and 10999 transitions. [2022-11-03 02:49:43,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-03 02:49:43,636 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 16.333333333333332) internal successors, (588), 36 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2022-11-03 02:49:43,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:49:43,653 INFO L225 Difference]: With dead ends: 7676 [2022-11-03 02:49:43,653 INFO L226 Difference]: Without dead ends: 7674 [2022-11-03 02:49:43,656 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 728 GetRequests, 682 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 550 ImplicationChecksByTransitivity, 75.8s TimeCoverageRelationStatistics Valid=345, Invalid=1697, Unknown=28, NotChecked=0, Total=2070 [2022-11-03 02:49:43,657 INFO L413 NwaCegarLoop]: 151 mSDtfsCounter, 1394 mSDsluCounter, 3772 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1394 SdHoareTripleChecker+Valid, 3923 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 56 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:49:43,658 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1394 Valid, 3923 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 56 Unchecked, 0.0s Time] [2022-11-03 02:49:43,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7674 states. [2022-11-03 02:49:43,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7674 to 7402. [2022-11-03 02:49:43,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7402 states, 7401 states have (on average 1.4323740035130388) internal successors, (10601), 7401 states have internal predecessors, (10601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:49:43,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7402 states to 7402 states and 10601 transitions. [2022-11-03 02:49:43,831 INFO L78 Accepts]: Start accepts. Automaton has 7402 states and 10601 transitions. Word has length 120 [2022-11-03 02:49:43,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:49:43,832 INFO L495 AbstractCegarLoop]: Abstraction has 7402 states and 10601 transitions. [2022-11-03 02:49:43,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 16.333333333333332) internal successors, (588), 36 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:49:43,832 INFO L276 IsEmpty]: Start isEmpty. Operand 7402 states and 10601 transitions. [2022-11-03 02:49:43,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-11-03 02:49:43,852 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:49:43,852 INFO L195 NwaCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1] [2022-11-03 02:49:43,877 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b891fb1-e8a9-4ba4-a8d7-a156e3019fb7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2022-11-03 02:49:44,086 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b891fb1-e8a9-4ba4-a8d7-a156e3019fb7/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (25)] Forceful destruction successful, exit code 0 [2022-11-03 02:49:44,303 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b891fb1-e8a9-4ba4-a8d7-a156e3019fb7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-11-03 02:49:44,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b891fb1-e8a9-4ba4-a8d7-a156e3019fb7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b891fb1-e8a9-4ba4-a8d7-a156e3019fb7/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b891fb1-e8a9-4ba4-a8d7-a156e3019fb7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:49:44,477 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:49:44,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:49:44,477 INFO L85 PathProgramCache]: Analyzing trace with hash 919135525, now seen corresponding path program 1 times [2022-11-03 02:49:44,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:49:44,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [219064959] [2022-11-03 02:49:44,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:49:44,479 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:49:44,479 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b891fb1-e8a9-4ba4-a8d7-a156e3019fb7/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:49:44,479 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b891fb1-e8a9-4ba4-a8d7-a156e3019fb7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:49:44,481 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b891fb1-e8a9-4ba4-a8d7-a156e3019fb7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-11-03 02:49:45,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:49:45,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 1776 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 02:49:45,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:49:45,890 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:49:45,890 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:49:45,890 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:49:45,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [219064959] [2022-11-03 02:49:45,890 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [219064959] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:49:45,890 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:49:45,890 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 02:49:45,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961475075] [2022-11-03 02:49:45,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:49:45,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:49:45,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:49:45,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:49:45,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:49:45,892 INFO L87 Difference]: Start difference. First operand 7402 states and 10601 transitions. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:49:46,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:49:46,248 INFO L93 Difference]: Finished difference Result 12586 states and 18001 transitions. [2022-11-03 02:49:46,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 02:49:46,254 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2022-11-03 02:49:46,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:49:46,271 INFO L225 Difference]: With dead ends: 12586 [2022-11-03 02:49:46,271 INFO L226 Difference]: Without dead ends: 11284 [2022-11-03 02:49:46,276 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:49:46,277 INFO L413 NwaCegarLoop]: 385 mSDtfsCounter, 375 mSDsluCounter, 1108 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 375 SdHoareTripleChecker+Valid, 1493 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 14 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:49:46,277 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [375 Valid, 1493 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 14 Unchecked, 0.2s Time] [2022-11-03 02:49:46,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11284 states. [2022-11-03 02:49:46,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11284 to 8942. [2022-11-03 02:49:46,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8942 states, 8941 states have (on average 1.4216530589419527) internal successors, (12711), 8941 states have internal predecessors, (12711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:49:46,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8942 states to 8942 states and 12711 transitions. [2022-11-03 02:49:46,431 INFO L78 Accepts]: Start accepts. Automaton has 8942 states and 12711 transitions. Word has length 120 [2022-11-03 02:49:46,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:49:46,431 INFO L495 AbstractCegarLoop]: Abstraction has 8942 states and 12711 transitions. [2022-11-03 02:49:46,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:49:46,432 INFO L276 IsEmpty]: Start isEmpty. Operand 8942 states and 12711 transitions. [2022-11-03 02:49:46,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-11-03 02:49:46,444 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:49:46,444 INFO L195 NwaCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1] [2022-11-03 02:49:46,474 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b891fb1-e8a9-4ba4-a8d7-a156e3019fb7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2022-11-03 02:49:46,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b891fb1-e8a9-4ba4-a8d7-a156e3019fb7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:49:46,661 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:49:46,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:49:46,661 INFO L85 PathProgramCache]: Analyzing trace with hash 1578667047, now seen corresponding path program 1 times [2022-11-03 02:49:46,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:49:46,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2078626200] [2022-11-03 02:49:46,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:49:46,663 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:49:46,663 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b891fb1-e8a9-4ba4-a8d7-a156e3019fb7/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:49:46,664 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b891fb1-e8a9-4ba4-a8d7-a156e3019fb7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:49:46,665 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b891fb1-e8a9-4ba4-a8d7-a156e3019fb7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-11-03 02:49:47,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:49:47,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 1776 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-03 02:49:47,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:49:51,170 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:49:51,170 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:49:58,796 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:49:58,796 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:49:58,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2078626200] [2022-11-03 02:49:58,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2078626200] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:49:58,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1992095349] [2022-11-03 02:49:58,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:49:58,797 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:49:58,797 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b891fb1-e8a9-4ba4-a8d7-a156e3019fb7/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:49:58,799 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b891fb1-e8a9-4ba4-a8d7-a156e3019fb7/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:49:58,800 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b891fb1-e8a9-4ba4-a8d7-a156e3019fb7/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (29)] Waiting until timeout for monitored process [2022-11-03 02:50:00,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:50:00,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 1776 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-03 02:50:00,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:50:03,606 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:50:03,607 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:51:07,285 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:51:07,286 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1992095349] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:51:07,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814064504] [2022-11-03 02:51:07,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:51:07,286 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:51:07,286 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b891fb1-e8a9-4ba4-a8d7-a156e3019fb7/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:51:07,288 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b891fb1-e8a9-4ba4-a8d7-a156e3019fb7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:51:07,290 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b891fb1-e8a9-4ba4-a8d7-a156e3019fb7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-11-03 02:51:07,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:51:08,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 1776 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-03 02:51:08,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:51:13,845 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:51:13,845 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:51:21,745 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:51:21,745 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [814064504] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:51:21,745 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:51:21,746 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 9, 9] total 36 [2022-11-03 02:51:21,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940808487] [2022-11-03 02:51:21,746 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:51:21,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-03 02:51:21,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:51:21,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-03 02:51:21,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=1053, Unknown=28, NotChecked=0, Total=1260 [2022-11-03 02:51:21,749 INFO L87 Difference]: Start difference. First operand 8942 states and 12711 transitions. Second operand has 36 states, 36 states have (on average 16.333333333333332) internal successors, (588), 36 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:51:23,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:51:23,928 INFO L93 Difference]: Finished difference Result 12390 states and 17698 transitions. [2022-11-03 02:51:23,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-03 02:51:23,929 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 16.333333333333332) internal successors, (588), 36 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2022-11-03 02:51:23,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:51:23,948 INFO L225 Difference]: With dead ends: 12390 [2022-11-03 02:51:23,948 INFO L226 Difference]: Without dead ends: 12388 [2022-11-03 02:51:23,952 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 728 GetRequests, 682 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 550 ImplicationChecksByTransitivity, 74.8s TimeCoverageRelationStatistics Valid=345, Invalid=1697, Unknown=28, NotChecked=0, Total=2070 [2022-11-03 02:51:23,952 INFO L413 NwaCegarLoop]: 152 mSDtfsCounter, 1991 mSDsluCounter, 3428 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1991 SdHoareTripleChecker+Valid, 3580 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 52 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:51:23,953 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1991 Valid, 3580 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 52 Unchecked, 0.0s Time] [2022-11-03 02:51:23,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12388 states. [2022-11-03 02:51:24,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12388 to 11844. [2022-11-03 02:51:24,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11844 states, 11843 states have (on average 1.4273410453432407) internal successors, (16904), 11843 states have internal predecessors, (16904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:51:24,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11844 states to 11844 states and 16904 transitions. [2022-11-03 02:51:24,160 INFO L78 Accepts]: Start accepts. Automaton has 11844 states and 16904 transitions. Word has length 120 [2022-11-03 02:51:24,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:51:24,160 INFO L495 AbstractCegarLoop]: Abstraction has 11844 states and 16904 transitions. [2022-11-03 02:51:24,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 16.333333333333332) internal successors, (588), 36 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:51:24,161 INFO L276 IsEmpty]: Start isEmpty. Operand 11844 states and 16904 transitions. [2022-11-03 02:51:24,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-11-03 02:51:24,175 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:51:24,176 INFO L195 NwaCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1] [2022-11-03 02:51:24,209 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b891fb1-e8a9-4ba4-a8d7-a156e3019fb7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2022-11-03 02:51:24,408 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b891fb1-e8a9-4ba4-a8d7-a156e3019fb7/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (29)] Forceful destruction successful, exit code 0 [2022-11-03 02:51:24,619 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b891fb1-e8a9-4ba4-a8d7-a156e3019fb7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-11-03 02:51:24,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b891fb1-e8a9-4ba4-a8d7-a156e3019fb7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b891fb1-e8a9-4ba4-a8d7-a156e3019fb7/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b891fb1-e8a9-4ba4-a8d7-a156e3019fb7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:51:24,789 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:51:24,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:51:24,790 INFO L85 PathProgramCache]: Analyzing trace with hash -2036241879, now seen corresponding path program 1 times [2022-11-03 02:51:24,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:51:24,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [802177222] [2022-11-03 02:51:24,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:51:24,791 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:51:24,791 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b891fb1-e8a9-4ba4-a8d7-a156e3019fb7/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:51:24,792 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b891fb1-e8a9-4ba4-a8d7-a156e3019fb7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:51:24,794 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b891fb1-e8a9-4ba4-a8d7-a156e3019fb7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2022-11-03 02:51:25,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:51:25,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 1776 conjuncts, 62 conjunts are in the unsatisfiable core [2022-11-03 02:51:25,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:51:30,256 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:51:30,256 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:51:41,957 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:51:41,957 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:51:41,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [802177222] [2022-11-03 02:51:41,957 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [802177222] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:51:41,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1994633031] [2022-11-03 02:51:41,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:51:41,958 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:51:41,958 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b891fb1-e8a9-4ba4-a8d7-a156e3019fb7/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:51:41,959 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b891fb1-e8a9-4ba4-a8d7-a156e3019fb7/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:51:41,960 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b891fb1-e8a9-4ba4-a8d7-a156e3019fb7/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (32)] Waiting until timeout for monitored process [2022-11-03 02:51:43,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:51:43,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 1776 conjuncts, 62 conjunts are in the unsatisfiable core [2022-11-03 02:51:43,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:51:47,473 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:51:47,473 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:52:56,655 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:52:56,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1994633031] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:52:56,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692884032] [2022-11-03 02:52:56,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:52:56,656 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:52:56,656 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b891fb1-e8a9-4ba4-a8d7-a156e3019fb7/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:52:56,657 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b891fb1-e8a9-4ba4-a8d7-a156e3019fb7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:52:56,659 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b891fb1-e8a9-4ba4-a8d7-a156e3019fb7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-11-03 02:52:57,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:52:57,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 1776 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-03 02:52:57,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:53:03,873 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:53:03,873 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:53:12,295 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:53:12,295 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1692884032] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:53:12,295 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:53:12,296 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 9, 9] total 36 [2022-11-03 02:53:12,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997792485] [2022-11-03 02:53:12,296 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:53:12,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-03 02:53:12,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:53:12,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-03 02:53:12,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=1050, Unknown=31, NotChecked=0, Total=1260 [2022-11-03 02:53:12,298 INFO L87 Difference]: Start difference. First operand 11844 states and 16904 transitions. Second operand has 36 states, 36 states have (on average 16.333333333333332) internal successors, (588), 36 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:53:15,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:53:15,396 INFO L93 Difference]: Finished difference Result 21070 states and 30134 transitions. [2022-11-03 02:53:15,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-03 02:53:15,396 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 16.333333333333332) internal successors, (588), 36 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2022-11-03 02:53:15,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:53:15,422 INFO L225 Difference]: With dead ends: 21070 [2022-11-03 02:53:15,423 INFO L226 Difference]: Without dead ends: 21068 [2022-11-03 02:53:15,427 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 727 GetRequests, 681 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 550 ImplicationChecksByTransitivity, 84.9s TimeCoverageRelationStatistics Valid=345, Invalid=1694, Unknown=31, NotChecked=0, Total=2070 [2022-11-03 02:53:15,428 INFO L413 NwaCegarLoop]: 149 mSDtfsCounter, 1739 mSDsluCounter, 3456 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1739 SdHoareTripleChecker+Valid, 3605 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:53:15,428 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1739 Valid, 3605 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 45 Unchecked, 0.0s Time] [2022-11-03 02:53:15,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21068 states. [2022-11-03 02:53:15,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21068 to 20364. [2022-11-03 02:53:15,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20364 states, 20363 states have (on average 1.4302411236065413) internal successors, (29124), 20363 states have internal predecessors, (29124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:53:15,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20364 states to 20364 states and 29124 transitions. [2022-11-03 02:53:15,903 INFO L78 Accepts]: Start accepts. Automaton has 20364 states and 29124 transitions. Word has length 120 [2022-11-03 02:53:15,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:53:15,904 INFO L495 AbstractCegarLoop]: Abstraction has 20364 states and 29124 transitions. [2022-11-03 02:53:15,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 16.333333333333332) internal successors, (588), 36 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:53:15,904 INFO L276 IsEmpty]: Start isEmpty. Operand 20364 states and 29124 transitions. [2022-11-03 02:53:15,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-11-03 02:53:15,929 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:53:15,930 INFO L195 NwaCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1] [2022-11-03 02:53:15,958 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b891fb1-e8a9-4ba4-a8d7-a156e3019fb7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2022-11-03 02:53:16,168 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b891fb1-e8a9-4ba4-a8d7-a156e3019fb7/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (32)] Forceful destruction successful, exit code 0 [2022-11-03 02:53:16,383 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b891fb1-e8a9-4ba4-a8d7-a156e3019fb7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-11-03 02:53:16,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b891fb1-e8a9-4ba4-a8d7-a156e3019fb7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b891fb1-e8a9-4ba4-a8d7-a156e3019fb7/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b891fb1-e8a9-4ba4-a8d7-a156e3019fb7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:53:16,554 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:53:16,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:53:16,555 INFO L85 PathProgramCache]: Analyzing trace with hash -1955314145, now seen corresponding path program 1 times [2022-11-03 02:53:16,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:53:16,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1098348143] [2022-11-03 02:53:16,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:53:16,556 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:53:16,556 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b891fb1-e8a9-4ba4-a8d7-a156e3019fb7/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:53:16,557 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b891fb1-e8a9-4ba4-a8d7-a156e3019fb7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:53:16,559 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b891fb1-e8a9-4ba4-a8d7-a156e3019fb7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2022-11-03 02:53:17,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:53:17,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 1776 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 02:53:17,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:53:17,869 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:53:17,869 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:53:17,869 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:53:17,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1098348143] [2022-11-03 02:53:17,870 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1098348143] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:53:17,870 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:53:17,870 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 02:53:17,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106441627] [2022-11-03 02:53:17,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:53:17,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:53:17,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:53:17,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:53:17,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:53:17,871 INFO L87 Difference]: Start difference. First operand 20364 states and 29124 transitions. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:53:18,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:53:18,671 INFO L93 Difference]: Finished difference Result 41278 states and 58717 transitions. [2022-11-03 02:53:18,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 02:53:18,673 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2022-11-03 02:53:18,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:53:18,705 INFO L225 Difference]: With dead ends: 41278 [2022-11-03 02:53:18,705 INFO L226 Difference]: Without dead ends: 36442 [2022-11-03 02:53:18,719 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:53:18,720 INFO L413 NwaCegarLoop]: 442 mSDtfsCounter, 317 mSDsluCounter, 1402 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 317 SdHoareTripleChecker+Valid, 1844 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 9 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:53:18,720 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [317 Valid, 1844 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 9 Unchecked, 0.4s Time] [2022-11-03 02:53:18,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36442 states. [2022-11-03 02:53:19,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36442 to 20364. [2022-11-03 02:53:19,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20364 states, 20363 states have (on average 1.4286696459264352) internal successors, (29092), 20363 states have internal predecessors, (29092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:53:19,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20364 states to 20364 states and 29092 transitions. [2022-11-03 02:53:19,280 INFO L78 Accepts]: Start accepts. Automaton has 20364 states and 29092 transitions. Word has length 120 [2022-11-03 02:53:19,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:53:19,280 INFO L495 AbstractCegarLoop]: Abstraction has 20364 states and 29092 transitions. [2022-11-03 02:53:19,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:53:19,281 INFO L276 IsEmpty]: Start isEmpty. Operand 20364 states and 29092 transitions. [2022-11-03 02:53:19,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-11-03 02:53:19,301 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:53:19,302 INFO L195 NwaCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1] [2022-11-03 02:53:19,337 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b891fb1-e8a9-4ba4-a8d7-a156e3019fb7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2022-11-03 02:53:19,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b891fb1-e8a9-4ba4-a8d7-a156e3019fb7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:53:19,509 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:53:19,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:53:19,509 INFO L85 PathProgramCache]: Analyzing trace with hash -221209695, now seen corresponding path program 1 times [2022-11-03 02:53:19,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:53:19,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [946104398] [2022-11-03 02:53:19,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:53:19,511 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:53:19,511 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b891fb1-e8a9-4ba4-a8d7-a156e3019fb7/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:53:19,513 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b891fb1-e8a9-4ba4-a8d7-a156e3019fb7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:53:19,552 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b891fb1-e8a9-4ba4-a8d7-a156e3019fb7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2022-11-03 02:53:20,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:53:20,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 1776 conjuncts, 54 conjunts are in the unsatisfiable core [2022-11-03 02:53:20,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:53:24,690 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:53:24,690 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:53:36,961 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:53:36,961 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:53:36,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [946104398] [2022-11-03 02:53:36,961 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [946104398] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:53:36,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [107290140] [2022-11-03 02:53:36,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:53:36,961 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:53:36,961 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b891fb1-e8a9-4ba4-a8d7-a156e3019fb7/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:53:36,962 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b891fb1-e8a9-4ba4-a8d7-a156e3019fb7/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:53:36,965 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b891fb1-e8a9-4ba4-a8d7-a156e3019fb7/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (36)] Waiting until timeout for monitored process [2022-11-03 02:53:38,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:53:38,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 1776 conjuncts, 54 conjunts are in the unsatisfiable core [2022-11-03 02:53:38,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:53:42,311 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:53:42,311 INFO L328 TraceCheckSpWp]: Computing backward predicates...