./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec14_product20.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 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_94a2d42d-ebea-4c22-b943-426dcf09d444/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94a2d42d-ebea-4c22-b943-426dcf09d444/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94a2d42d-ebea-4c22-b943-426dcf09d444/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94a2d42d-ebea-4c22-b943-426dcf09d444/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec14_product20.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94a2d42d-ebea-4c22-b943-426dcf09d444/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94a2d42d-ebea-4c22-b943-426dcf09d444/bin/utaipan-gh47qXpMRh --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash f6cc861ca86011eb32ffd09a18c7045c0cb28e684d3b73d1659bc499a4213e84 --- 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-2329fc7 [2022-12-14 04:39:39,966 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 04:39:39,968 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 04:39:39,982 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 04:39:39,982 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 04:39:39,983 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 04:39:39,984 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 04:39:39,985 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 04:39:39,986 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 04:39:39,986 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 04:39:39,987 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 04:39:39,987 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 04:39:39,988 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 04:39:39,988 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 04:39:39,989 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 04:39:39,990 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 04:39:39,990 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 04:39:39,991 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 04:39:39,992 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 04:39:39,993 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 04:39:39,994 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 04:39:39,996 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 04:39:39,997 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 04:39:39,998 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 04:39:40,005 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 04:39:40,005 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 04:39:40,006 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 04:39:40,006 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 04:39:40,007 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 04:39:40,007 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 04:39:40,008 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 04:39:40,008 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 04:39:40,009 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 04:39:40,009 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 04:39:40,010 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 04:39:40,010 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 04:39:40,011 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 04:39:40,011 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 04:39:40,011 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 04:39:40,012 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 04:39:40,012 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 04:39:40,013 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94a2d42d-ebea-4c22-b943-426dcf09d444/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 04:39:40,029 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 04:39:40,029 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 04:39:40,029 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 04:39:40,029 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 04:39:40,030 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 04:39:40,030 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 04:39:40,030 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 04:39:40,035 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 04:39:40,035 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 04:39:40,035 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 04:39:40,035 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 04:39:40,035 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 04:39:40,035 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 04:39:40,036 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 04:39:40,036 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 04:39:40,036 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 04:39:40,036 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 04:39:40,036 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 04:39:40,037 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 04:39:40,037 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 04:39:40,037 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 04:39:40,037 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 04:39:40,037 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 04:39:40,037 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 04:39:40,037 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 04:39:40,038 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 04:39:40,038 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 04:39:40,038 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 04:39:40,038 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 04:39:40,038 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 04:39:40,038 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 04:39:40,038 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 04:39:40,039 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 04:39:40,039 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 04:39:40,039 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 04:39:40,039 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 04:39:40,039 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 04:39:40,039 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 04:39:40,040 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 04:39:40,040 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 04:39:40,040 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 04:39:40,040 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_94a2d42d-ebea-4c22-b943-426dcf09d444/bin/utaipan-gh47qXpMRh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94a2d42d-ebea-4c22-b943-426dcf09d444/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f6cc861ca86011eb32ffd09a18c7045c0cb28e684d3b73d1659bc499a4213e84 [2022-12-14 04:39:40,196 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 04:39:40,215 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 04:39:40,218 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 04:39:40,219 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 04:39:40,219 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 04:39:40,220 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94a2d42d-ebea-4c22-b943-426dcf09d444/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/product-lines/elevator_spec14_product20.cil.c [2022-12-14 04:39:42,802 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 04:39:43,045 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 04:39:43,045 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94a2d42d-ebea-4c22-b943-426dcf09d444/sv-benchmarks/c/product-lines/elevator_spec14_product20.cil.c [2022-12-14 04:39:43,063 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94a2d42d-ebea-4c22-b943-426dcf09d444/bin/utaipan-gh47qXpMRh/data/0db8d6302/a66874016655491891727f126766c559/FLAG5fd621719 [2022-12-14 04:39:43,373 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94a2d42d-ebea-4c22-b943-426dcf09d444/bin/utaipan-gh47qXpMRh/data/0db8d6302/a66874016655491891727f126766c559 [2022-12-14 04:39:43,376 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 04:39:43,377 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 04:39:43,378 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 04:39:43,378 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 04:39:43,382 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 04:39:43,383 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 04:39:43" (1/1) ... [2022-12-14 04:39:43,384 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4826160e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:39:43, skipping insertion in model container [2022-12-14 04:39:43,384 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 04:39:43" (1/1) ... [2022-12-14 04:39:43,392 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 04:39:43,430 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 04:39:43,731 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94a2d42d-ebea-4c22-b943-426dcf09d444/sv-benchmarks/c/product-lines/elevator_spec14_product20.cil.c[69987,70000] [2022-12-14 04:39:43,734 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 04:39:43,743 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 04:39:43,819 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94a2d42d-ebea-4c22-b943-426dcf09d444/sv-benchmarks/c/product-lines/elevator_spec14_product20.cil.c[69987,70000] [2022-12-14 04:39:43,820 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 04:39:43,867 INFO L208 MainTranslator]: Completed translation [2022-12-14 04:39:43,867 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:39:43 WrapperNode [2022-12-14 04:39:43,867 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 04:39:43,868 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 04:39:43,868 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 04:39:43,868 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 04:39:43,873 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:39:43" (1/1) ... [2022-12-14 04:39:43,896 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:39:43" (1/1) ... [2022-12-14 04:39:43,943 INFO L138 Inliner]: procedures = 93, calls = 339, calls flagged for inlining = 26, calls inlined = 22, statements flattened = 1060 [2022-12-14 04:39:43,943 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 04:39:43,944 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 04:39:43,944 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 04:39:43,944 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 04:39:43,953 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:39:43" (1/1) ... [2022-12-14 04:39:43,954 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:39:43" (1/1) ... [2022-12-14 04:39:43,959 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:39:43" (1/1) ... [2022-12-14 04:39:43,960 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:39:43" (1/1) ... [2022-12-14 04:39:43,978 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:39:43" (1/1) ... [2022-12-14 04:39:43,989 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:39:43" (1/1) ... [2022-12-14 04:39:43,994 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:39:43" (1/1) ... [2022-12-14 04:39:43,998 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:39:43" (1/1) ... [2022-12-14 04:39:44,006 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 04:39:44,008 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 04:39:44,008 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 04:39:44,008 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 04:39:44,009 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:39:43" (1/1) ... [2022-12-14 04:39:44,016 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 04:39:44,029 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94a2d42d-ebea-4c22-b943-426dcf09d444/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 04:39:44,041 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94a2d42d-ebea-4c22-b943-426dcf09d444/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 04:39:44,043 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94a2d42d-ebea-4c22-b943-426dcf09d444/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 04:39:44,076 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 04:39:44,077 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2022-12-14 04:39:44,077 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2022-12-14 04:39:44,077 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2022-12-14 04:39:44,077 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2022-12-14 04:39:44,077 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__weight [2022-12-14 04:39:44,077 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__weight [2022-12-14 04:39:44,077 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2022-12-14 04:39:44,077 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2022-12-14 04:39:44,078 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2022-12-14 04:39:44,078 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2022-12-14 04:39:44,078 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2022-12-14 04:39:44,078 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2022-12-14 04:39:44,078 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2022-12-14 04:39:44,078 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2022-12-14 04:39:44,078 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2022-12-14 04:39:44,079 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2022-12-14 04:39:44,079 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2022-12-14 04:39:44,079 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2022-12-14 04:39:44,079 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2022-12-14 04:39:44,079 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2022-12-14 04:39:44,079 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2022-12-14 04:39:44,079 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2022-12-14 04:39:44,080 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2022-12-14 04:39:44,080 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2022-12-14 04:39:44,080 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2022-12-14 04:39:44,080 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2022-12-14 04:39:44,080 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2022-12-14 04:39:44,080 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2022-12-14 04:39:44,080 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2022-12-14 04:39:44,081 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2022-12-14 04:39:44,081 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2022-12-14 04:39:44,081 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2022-12-14 04:39:44,081 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2022-12-14 04:39:44,081 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2022-12-14 04:39:44,081 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2022-12-14 04:39:44,081 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2022-12-14 04:39:44,082 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2022-12-14 04:39:44,082 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2022-12-14 04:39:44,082 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2022-12-14 04:39:44,082 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2022-12-14 04:39:44,082 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 04:39:44,082 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2022-12-14 04:39:44,082 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2022-12-14 04:39:44,083 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2022-12-14 04:39:44,083 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2022-12-14 04:39:44,083 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2022-12-14 04:39:44,083 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2022-12-14 04:39:44,083 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 04:39:44,083 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 04:39:44,083 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2022-12-14 04:39:44,084 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2022-12-14 04:39:44,084 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__executivefloor [2022-12-14 04:39:44,084 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__executivefloor [2022-12-14 04:39:44,198 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 04:39:44,200 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 04:39:44,946 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 04:39:45,362 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 04:39:45,363 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-12-14 04:39:45,365 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 04:39:45 BoogieIcfgContainer [2022-12-14 04:39:45,365 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 04:39:45,367 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 04:39:45,367 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 04:39:45,369 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 04:39:45,369 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 04:39:43" (1/3) ... [2022-12-14 04:39:45,370 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16915515 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 04:39:45, skipping insertion in model container [2022-12-14 04:39:45,370 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:39:43" (2/3) ... [2022-12-14 04:39:45,370 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16915515 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 04:39:45, skipping insertion in model container [2022-12-14 04:39:45,370 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 04:39:45" (3/3) ... [2022-12-14 04:39:45,371 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec14_product20.cil.c [2022-12-14 04:39:45,386 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 04:39:45,387 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 04:39:45,427 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 04:39:45,431 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;@2df5e93f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 04:39:45,432 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 04:39:45,437 INFO L276 IsEmpty]: Start isEmpty. Operand has 366 states, 242 states have (on average 1.56198347107438) internal successors, (378), 260 states have internal predecessors, (378), 97 states have call successors, (97), 25 states have call predecessors, (97), 25 states have return successors, (97), 94 states have call predecessors, (97), 97 states have call successors, (97) [2022-12-14 04:39:45,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-12-14 04:39:45,447 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:39:45,448 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] [2022-12-14 04:39:45,448 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 04:39:45,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:39:45,453 INFO L85 PathProgramCache]: Analyzing trace with hash -1465173370, now seen corresponding path program 1 times [2022-12-14 04:39:45,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 04:39:45,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069009400] [2022-12-14 04:39:45,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:39:45,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 04:39:45,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:39:45,932 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 04:39:45,932 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 04:39:45,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069009400] [2022-12-14 04:39:45,933 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069009400] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 04:39:45,933 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 04:39:45,933 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 04:39:45,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807646133] [2022-12-14 04:39:45,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 04:39:45,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 04:39:45,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 04:39:45,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 04:39:45,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 04:39:45,968 INFO L87 Difference]: Start difference. First operand has 366 states, 242 states have (on average 1.56198347107438) internal successors, (378), 260 states have internal predecessors, (378), 97 states have call successors, (97), 25 states have call predecessors, (97), 25 states have return successors, (97), 94 states have call predecessors, (97), 97 states have call successors, (97) Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-12-14 04:39:46,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:39:46,279 INFO L93 Difference]: Finished difference Result 1074 states and 1705 transitions. [2022-12-14 04:39:46,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 04:39:46,281 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 43 [2022-12-14 04:39:46,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:39:46,295 INFO L225 Difference]: With dead ends: 1074 [2022-12-14 04:39:46,295 INFO L226 Difference]: Without dead ends: 709 [2022-12-14 04:39:46,301 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 04:39:46,303 INFO L413 NwaCegarLoop]: 677 mSDtfsCounter, 546 mSDsluCounter, 519 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 546 SdHoareTripleChecker+Valid, 1196 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 04:39:46,303 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [546 Valid, 1196 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 04:39:46,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 709 states. [2022-12-14 04:39:46,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 709 to 673. [2022-12-14 04:39:46,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 673 states, 459 states have (on average 1.5642701525054465) internal successors, (718), 485 states have internal predecessors, (718), 170 states have call successors, (170), 45 states have call predecessors, (170), 43 states have return successors, (175), 157 states have call predecessors, (175), 168 states have call successors, (175) [2022-12-14 04:39:46,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 673 states to 673 states and 1063 transitions. [2022-12-14 04:39:46,407 INFO L78 Accepts]: Start accepts. Automaton has 673 states and 1063 transitions. Word has length 43 [2022-12-14 04:39:46,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:39:46,408 INFO L495 AbstractCegarLoop]: Abstraction has 673 states and 1063 transitions. [2022-12-14 04:39:46,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-12-14 04:39:46,408 INFO L276 IsEmpty]: Start isEmpty. Operand 673 states and 1063 transitions. [2022-12-14 04:39:46,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-12-14 04:39:46,417 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:39:46,417 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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] [2022-12-14 04:39:46,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 04:39:46,417 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 04:39:46,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:39:46,418 INFO L85 PathProgramCache]: Analyzing trace with hash 1972900882, now seen corresponding path program 1 times [2022-12-14 04:39:46,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 04:39:46,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803432479] [2022-12-14 04:39:46,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:39:46,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 04:39:46,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:39:46,710 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-12-14 04:39:46,711 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 04:39:46,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803432479] [2022-12-14 04:39:46,711 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803432479] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 04:39:46,711 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 04:39:46,711 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-14 04:39:46,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439298006] [2022-12-14 04:39:46,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 04:39:46,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 04:39:46,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 04:39:46,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 04:39:46,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-14 04:39:46,714 INFO L87 Difference]: Start difference. First operand 673 states and 1063 transitions. Second operand has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 7 states have internal predecessors, (43), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 5 states have call predecessors, (15), 4 states have call successors, (15) [2022-12-14 04:39:48,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:39:48,459 INFO L93 Difference]: Finished difference Result 2177 states and 3481 transitions. [2022-12-14 04:39:48,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-14 04:39:48,460 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 7 states have internal predecessors, (43), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 5 states have call predecessors, (15), 4 states have call successors, (15) Word has length 87 [2022-12-14 04:39:48,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:39:48,468 INFO L225 Difference]: With dead ends: 2177 [2022-12-14 04:39:48,468 INFO L226 Difference]: Without dead ends: 1516 [2022-12-14 04:39:48,473 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-12-14 04:39:48,474 INFO L413 NwaCegarLoop]: 319 mSDtfsCounter, 1094 mSDsluCounter, 949 mSDsCounter, 0 mSdLazyCounter, 2673 mSolverCounterSat, 455 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1184 SdHoareTripleChecker+Valid, 1268 SdHoareTripleChecker+Invalid, 3128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 455 IncrementalHoareTripleChecker+Valid, 2673 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-12-14 04:39:48,474 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1184 Valid, 1268 Invalid, 3128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [455 Valid, 2673 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-12-14 04:39:48,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1516 states. [2022-12-14 04:39:48,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1516 to 1374. [2022-12-14 04:39:48,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1374 states, 940 states have (on average 1.5606382978723403) internal successors, (1467), 991 states have internal predecessors, (1467), 340 states have call successors, (340), 91 states have call predecessors, (340), 93 states have return successors, (384), 318 states have call predecessors, (384), 336 states have call successors, (384) [2022-12-14 04:39:48,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1374 states to 1374 states and 2191 transitions. [2022-12-14 04:39:48,555 INFO L78 Accepts]: Start accepts. Automaton has 1374 states and 2191 transitions. Word has length 87 [2022-12-14 04:39:48,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:39:48,556 INFO L495 AbstractCegarLoop]: Abstraction has 1374 states and 2191 transitions. [2022-12-14 04:39:48,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 7 states have internal predecessors, (43), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 5 states have call predecessors, (15), 4 states have call successors, (15) [2022-12-14 04:39:48,556 INFO L276 IsEmpty]: Start isEmpty. Operand 1374 states and 2191 transitions. [2022-12-14 04:39:48,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-12-14 04:39:48,559 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:39:48,559 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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] [2022-12-14 04:39:48,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 04:39:48,559 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 04:39:48,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:39:48,560 INFO L85 PathProgramCache]: Analyzing trace with hash 1122111932, now seen corresponding path program 1 times [2022-12-14 04:39:48,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 04:39:48,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724551902] [2022-12-14 04:39:48,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:39:48,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 04:39:48,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:39:48,827 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-12-14 04:39:48,828 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 04:39:48,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724551902] [2022-12-14 04:39:48,828 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724551902] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 04:39:48,828 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 04:39:48,829 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-12-14 04:39:48,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449251274] [2022-12-14 04:39:48,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 04:39:48,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-14 04:39:48,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 04:39:48,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-14 04:39:48,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-12-14 04:39:48,831 INFO L87 Difference]: Start difference. First operand 1374 states and 2191 transitions. Second operand has 9 states, 8 states have (on average 5.75) internal successors, (46), 8 states have internal predecessors, (46), 5 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) [2022-12-14 04:39:50,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:39:50,789 INFO L93 Difference]: Finished difference Result 2024 states and 3264 transitions. [2022-12-14 04:39:50,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-14 04:39:50,789 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 5.75) internal successors, (46), 8 states have internal predecessors, (46), 5 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) Word has length 91 [2022-12-14 04:39:50,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:39:50,803 INFO L225 Difference]: With dead ends: 2024 [2022-12-14 04:39:50,803 INFO L226 Difference]: Without dead ends: 2022 [2022-12-14 04:39:50,805 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2022-12-14 04:39:50,806 INFO L413 NwaCegarLoop]: 452 mSDtfsCounter, 1383 mSDsluCounter, 1572 mSDsCounter, 0 mSdLazyCounter, 3178 mSolverCounterSat, 817 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1405 SdHoareTripleChecker+Valid, 2024 SdHoareTripleChecker+Invalid, 3995 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 817 IncrementalHoareTripleChecker+Valid, 3178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-12-14 04:39:50,806 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1405 Valid, 2024 Invalid, 3995 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [817 Valid, 3178 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-12-14 04:39:50,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2022 states. [2022-12-14 04:39:50,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2022 to 1784. [2022-12-14 04:39:50,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1784 states, 1173 states have (on average 1.5123614663256606) internal successors, (1774), 1249 states have internal predecessors, (1774), 483 states have call successors, (483), 121 states have call predecessors, (483), 127 states have return successors, (551), 452 states have call predecessors, (551), 477 states have call successors, (551) [2022-12-14 04:39:50,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1784 states to 1784 states and 2808 transitions. [2022-12-14 04:39:50,952 INFO L78 Accepts]: Start accepts. Automaton has 1784 states and 2808 transitions. Word has length 91 [2022-12-14 04:39:50,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:39:50,952 INFO L495 AbstractCegarLoop]: Abstraction has 1784 states and 2808 transitions. [2022-12-14 04:39:50,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 5.75) internal successors, (46), 8 states have internal predecessors, (46), 5 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) [2022-12-14 04:39:50,953 INFO L276 IsEmpty]: Start isEmpty. Operand 1784 states and 2808 transitions. [2022-12-14 04:39:50,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-12-14 04:39:50,957 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:39:50,957 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 04:39:50,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-14 04:39:50,958 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 04:39:50,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:39:50,958 INFO L85 PathProgramCache]: Analyzing trace with hash -846288382, now seen corresponding path program 1 times [2022-12-14 04:39:50,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 04:39:50,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461148320] [2022-12-14 04:39:50,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:39:50,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 04:39:50,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:39:51,145 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-12-14 04:39:51,145 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 04:39:51,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461148320] [2022-12-14 04:39:51,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461148320] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 04:39:51,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802218826] [2022-12-14 04:39:51,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:39:51,146 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:39:51,146 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94a2d42d-ebea-4c22-b943-426dcf09d444/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 04:39:51,147 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94a2d42d-ebea-4c22-b943-426dcf09d444/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 04:39:51,148 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94a2d42d-ebea-4c22-b943-426dcf09d444/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 04:39:51,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:39:51,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 1509 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 04:39:51,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:39:51,467 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2022-12-14 04:39:51,467 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 04:39:51,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1802218826] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 04:39:51,467 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 04:39:51,468 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 10 [2022-12-14 04:39:51,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308682181] [2022-12-14 04:39:51,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 04:39:51,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 04:39:51,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 04:39:51,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 04:39:51,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-12-14 04:39:51,470 INFO L87 Difference]: Start difference. First operand 1784 states and 2808 transitions. Second operand has 6 states, 5 states have (on average 11.6) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 3 states have call predecessors, (18), 2 states have call successors, (18) [2022-12-14 04:39:51,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:39:51,979 INFO L93 Difference]: Finished difference Result 3555 states and 5629 transitions. [2022-12-14 04:39:51,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 04:39:51,980 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 11.6) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 3 states have call predecessors, (18), 2 states have call successors, (18) Word has length 121 [2022-12-14 04:39:51,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:39:51,987 INFO L225 Difference]: With dead ends: 3555 [2022-12-14 04:39:51,987 INFO L226 Difference]: Without dead ends: 1782 [2022-12-14 04:39:51,994 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-12-14 04:39:51,995 INFO L413 NwaCegarLoop]: 583 mSDtfsCounter, 375 mSDsluCounter, 1886 mSDsCounter, 0 mSdLazyCounter, 341 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 380 SdHoareTripleChecker+Valid, 2469 SdHoareTripleChecker+Invalid, 357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 341 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 04:39:51,995 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [380 Valid, 2469 Invalid, 357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 341 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 04:39:51,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1782 states. [2022-12-14 04:39:52,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1782 to 1780. [2022-12-14 04:39:52,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1780 states, 1173 states have (on average 1.5089514066496164) internal successors, (1770), 1245 states have internal predecessors, (1770), 479 states have call successors, (479), 121 states have call predecessors, (479), 127 states have return successors, (539), 452 states have call predecessors, (539), 473 states have call successors, (539) [2022-12-14 04:39:52,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1780 states to 1780 states and 2788 transitions. [2022-12-14 04:39:52,083 INFO L78 Accepts]: Start accepts. Automaton has 1780 states and 2788 transitions. Word has length 121 [2022-12-14 04:39:52,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:39:52,083 INFO L495 AbstractCegarLoop]: Abstraction has 1780 states and 2788 transitions. [2022-12-14 04:39:52,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 11.6) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 3 states have call predecessors, (18), 2 states have call successors, (18) [2022-12-14 04:39:52,083 INFO L276 IsEmpty]: Start isEmpty. Operand 1780 states and 2788 transitions. [2022-12-14 04:39:52,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-12-14 04:39:52,086 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:39:52,086 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 04:39:52,095 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94a2d42d-ebea-4c22-b943-426dcf09d444/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 04:39:52,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94a2d42d-ebea-4c22-b943-426dcf09d444/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:39:52,288 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 04:39:52,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:39:52,289 INFO L85 PathProgramCache]: Analyzing trace with hash -1694174869, now seen corresponding path program 1 times [2022-12-14 04:39:52,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 04:39:52,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534017045] [2022-12-14 04:39:52,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:39:52,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 04:39:52,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:39:52,547 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2022-12-14 04:39:52,548 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 04:39:52,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534017045] [2022-12-14 04:39:52,548 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534017045] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 04:39:52,548 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 04:39:52,548 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 04:39:52,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424219959] [2022-12-14 04:39:52,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 04:39:52,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 04:39:52,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 04:39:52,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 04:39:52,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 04:39:52,550 INFO L87 Difference]: Start difference. First operand 1780 states and 2788 transitions. Second operand has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (19), 1 states have call predecessors, (19), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2022-12-14 04:39:52,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:39:52,734 INFO L93 Difference]: Finished difference Result 3646 states and 5774 transitions. [2022-12-14 04:39:52,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 04:39:52,735 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (19), 1 states have call predecessors, (19), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 122 [2022-12-14 04:39:52,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:39:52,744 INFO L225 Difference]: With dead ends: 3646 [2022-12-14 04:39:52,744 INFO L226 Difference]: Without dead ends: 1878 [2022-12-14 04:39:52,751 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 [2022-12-14 04:39:52,752 INFO L413 NwaCegarLoop]: 534 mSDtfsCounter, 30 mSDsluCounter, 1033 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 1567 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 04:39:52,752 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 1567 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 04:39:52,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1878 states. [2022-12-14 04:39:52,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1878 to 1792. [2022-12-14 04:39:52,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1792 states, 1185 states have (on average 1.5037974683544304) internal successors, (1782), 1257 states have internal predecessors, (1782), 479 states have call successors, (479), 121 states have call predecessors, (479), 127 states have return successors, (539), 452 states have call predecessors, (539), 473 states have call successors, (539) [2022-12-14 04:39:52,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1792 states to 1792 states and 2800 transitions. [2022-12-14 04:39:52,833 INFO L78 Accepts]: Start accepts. Automaton has 1792 states and 2800 transitions. Word has length 122 [2022-12-14 04:39:52,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:39:52,833 INFO L495 AbstractCegarLoop]: Abstraction has 1792 states and 2800 transitions. [2022-12-14 04:39:52,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (19), 1 states have call predecessors, (19), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2022-12-14 04:39:52,834 INFO L276 IsEmpty]: Start isEmpty. Operand 1792 states and 2800 transitions. [2022-12-14 04:39:52,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-12-14 04:39:52,836 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:39:52,836 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 04:39:52,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-14 04:39:52,836 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 04:39:52,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:39:52,837 INFO L85 PathProgramCache]: Analyzing trace with hash 676292118, now seen corresponding path program 1 times [2022-12-14 04:39:52,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 04:39:52,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431613289] [2022-12-14 04:39:52,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:39:52,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 04:39:52,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:39:53,045 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-12-14 04:39:53,045 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 04:39:53,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431613289] [2022-12-14 04:39:53,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431613289] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 04:39:53,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85461525] [2022-12-14 04:39:53,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:39:53,045 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:39:53,046 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94a2d42d-ebea-4c22-b943-426dcf09d444/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 04:39:53,046 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94a2d42d-ebea-4c22-b943-426dcf09d444/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 04:39:53,047 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94a2d42d-ebea-4c22-b943-426dcf09d444/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 04:39:53,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:39:53,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 1518 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 04:39:53,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:39:53,312 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-12-14 04:39:53,312 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 04:39:53,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [85461525] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 04:39:53,312 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 04:39:53,313 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 10 [2022-12-14 04:39:53,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616423544] [2022-12-14 04:39:53,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 04:39:53,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 04:39:53,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 04:39:53,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 04:39:53,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-12-14 04:39:53,314 INFO L87 Difference]: Start difference. First operand 1792 states and 2800 transitions. Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2022-12-14 04:39:53,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:39:53,606 INFO L93 Difference]: Finished difference Result 3728 states and 5948 transitions. [2022-12-14 04:39:53,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 04:39:53,607 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 125 [2022-12-14 04:39:53,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:39:53,615 INFO L225 Difference]: With dead ends: 3728 [2022-12-14 04:39:53,615 INFO L226 Difference]: Without dead ends: 1948 [2022-12-14 04:39:53,623 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-12-14 04:39:53,623 INFO L413 NwaCegarLoop]: 461 mSDtfsCounter, 213 mSDsluCounter, 898 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 1359 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 04:39:53,624 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 1359 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 04:39:53,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1948 states. [2022-12-14 04:39:53,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1948 to 1948. [2022-12-14 04:39:53,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1948 states, 1337 states have (on average 1.5512341062079282) internal successors, (2074), 1409 states have internal predecessors, (2074), 479 states have call successors, (479), 125 states have call predecessors, (479), 131 states have return successors, (539), 452 states have call predecessors, (539), 473 states have call successors, (539) [2022-12-14 04:39:53,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1948 states to 1948 states and 3092 transitions. [2022-12-14 04:39:53,707 INFO L78 Accepts]: Start accepts. Automaton has 1948 states and 3092 transitions. Word has length 125 [2022-12-14 04:39:53,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:39:53,707 INFO L495 AbstractCegarLoop]: Abstraction has 1948 states and 3092 transitions. [2022-12-14 04:39:53,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2022-12-14 04:39:53,708 INFO L276 IsEmpty]: Start isEmpty. Operand 1948 states and 3092 transitions. [2022-12-14 04:39:53,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-12-14 04:39:53,711 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:39:53,711 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 04:39:53,718 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94a2d42d-ebea-4c22-b943-426dcf09d444/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 04:39:53,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94a2d42d-ebea-4c22-b943-426dcf09d444/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:39:53,911 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 04:39:53,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:39:53,912 INFO L85 PathProgramCache]: Analyzing trace with hash 1062465662, now seen corresponding path program 1 times [2022-12-14 04:39:53,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 04:39:53,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751261350] [2022-12-14 04:39:53,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:39:53,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 04:39:53,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:39:54,007 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2022-12-14 04:39:54,007 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 04:39:54,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751261350] [2022-12-14 04:39:54,007 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751261350] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 04:39:54,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683807961] [2022-12-14 04:39:54,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:39:54,008 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:39:54,008 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94a2d42d-ebea-4c22-b943-426dcf09d444/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 04:39:54,008 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94a2d42d-ebea-4c22-b943-426dcf09d444/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 04:39:54,009 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94a2d42d-ebea-4c22-b943-426dcf09d444/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 04:39:54,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:39:54,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 1523 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 04:39:54,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:39:54,239 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 70 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-12-14 04:39:54,239 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 04:39:54,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1683807961] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 04:39:54,239 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 04:39:54,239 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-12-14 04:39:54,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344119915] [2022-12-14 04:39:54,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 04:39:54,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 04:39:54,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 04:39:54,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 04:39:54,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-14 04:39:54,241 INFO L87 Difference]: Start difference. First operand 1948 states and 3092 transitions. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2022-12-14 04:39:54,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:39:54,568 INFO L93 Difference]: Finished difference Result 4040 states and 6526 transitions. [2022-12-14 04:39:54,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 04:39:54,569 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 130 [2022-12-14 04:39:54,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:39:54,579 INFO L225 Difference]: With dead ends: 4040 [2022-12-14 04:39:54,579 INFO L226 Difference]: Without dead ends: 2104 [2022-12-14 04:39:54,587 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-12-14 04:39:54,588 INFO L413 NwaCegarLoop]: 461 mSDtfsCounter, 211 mSDsluCounter, 898 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 1359 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 04:39:54,588 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [211 Valid, 1359 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 04:39:54,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2104 states. [2022-12-14 04:39:54,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2104 to 2104. [2022-12-14 04:39:54,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2104 states, 1489 states have (on average 1.5889858965748824) internal successors, (2366), 1561 states have internal predecessors, (2366), 479 states have call successors, (479), 129 states have call predecessors, (479), 135 states have return successors, (539), 452 states have call predecessors, (539), 473 states have call successors, (539) [2022-12-14 04:39:54,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2104 states to 2104 states and 3384 transitions. [2022-12-14 04:39:54,674 INFO L78 Accepts]: Start accepts. Automaton has 2104 states and 3384 transitions. Word has length 130 [2022-12-14 04:39:54,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:39:54,675 INFO L495 AbstractCegarLoop]: Abstraction has 2104 states and 3384 transitions. [2022-12-14 04:39:54,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2022-12-14 04:39:54,675 INFO L276 IsEmpty]: Start isEmpty. Operand 2104 states and 3384 transitions. [2022-12-14 04:39:54,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-12-14 04:39:54,678 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:39:54,678 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 04:39:54,684 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94a2d42d-ebea-4c22-b943-426dcf09d444/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-12-14 04:39:54,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94a2d42d-ebea-4c22-b943-426dcf09d444/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:39:54,879 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 04:39:54,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:39:54,879 INFO L85 PathProgramCache]: Analyzing trace with hash 533916462, now seen corresponding path program 1 times [2022-12-14 04:39:54,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 04:39:54,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492227377] [2022-12-14 04:39:54,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:39:54,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 04:39:54,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:39:54,983 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2022-12-14 04:39:54,983 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 04:39:54,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492227377] [2022-12-14 04:39:54,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492227377] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 04:39:54,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558132707] [2022-12-14 04:39:54,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:39:54,984 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:39:54,984 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94a2d42d-ebea-4c22-b943-426dcf09d444/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 04:39:54,985 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94a2d42d-ebea-4c22-b943-426dcf09d444/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 04:39:54,986 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94a2d42d-ebea-4c22-b943-426dcf09d444/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 04:39:55,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:39:55,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 1527 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 04:39:55,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:39:55,244 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-12-14 04:39:55,244 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 04:39:55,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1558132707] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 04:39:55,244 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 04:39:55,244 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-12-14 04:39:55,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374279887] [2022-12-14 04:39:55,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 04:39:55,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 04:39:55,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 04:39:55,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 04:39:55,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-14 04:39:55,246 INFO L87 Difference]: Start difference. First operand 2104 states and 3384 transitions. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2022-12-14 04:39:55,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:39:55,533 INFO L93 Difference]: Finished difference Result 4352 states and 7104 transitions. [2022-12-14 04:39:55,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 04:39:55,534 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 134 [2022-12-14 04:39:55,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:39:55,544 INFO L225 Difference]: With dead ends: 4352 [2022-12-14 04:39:55,544 INFO L226 Difference]: Without dead ends: 2260 [2022-12-14 04:39:55,551 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-12-14 04:39:55,551 INFO L413 NwaCegarLoop]: 461 mSDtfsCounter, 209 mSDsluCounter, 898 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 1359 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 04:39:55,552 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [209 Valid, 1359 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 04:39:55,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2260 states. [2022-12-14 04:39:55,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2260 to 2260. [2022-12-14 04:39:55,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2260 states, 1641 states have (on average 1.6197440585009142) internal successors, (2658), 1713 states have internal predecessors, (2658), 479 states have call successors, (479), 133 states have call predecessors, (479), 139 states have return successors, (539), 452 states have call predecessors, (539), 473 states have call successors, (539) [2022-12-14 04:39:55,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2260 states to 2260 states and 3676 transitions. [2022-12-14 04:39:55,633 INFO L78 Accepts]: Start accepts. Automaton has 2260 states and 3676 transitions. Word has length 134 [2022-12-14 04:39:55,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:39:55,634 INFO L495 AbstractCegarLoop]: Abstraction has 2260 states and 3676 transitions. [2022-12-14 04:39:55,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2022-12-14 04:39:55,634 INFO L276 IsEmpty]: Start isEmpty. Operand 2260 states and 3676 transitions. [2022-12-14 04:39:55,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-12-14 04:39:55,637 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:39:55,637 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 04:39:55,645 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94a2d42d-ebea-4c22-b943-426dcf09d444/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 04:39:55,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94a2d42d-ebea-4c22-b943-426dcf09d444/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:39:55,838 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 04:39:55,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:39:55,839 INFO L85 PathProgramCache]: Analyzing trace with hash -1114649610, now seen corresponding path program 1 times [2022-12-14 04:39:55,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 04:39:55,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414645092] [2022-12-14 04:39:55,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:39:55,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 04:39:55,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:39:55,933 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-12-14 04:39:55,933 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 04:39:55,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414645092] [2022-12-14 04:39:55,933 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414645092] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 04:39:55,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152795081] [2022-12-14 04:39:55,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:39:55,933 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:39:55,934 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94a2d42d-ebea-4c22-b943-426dcf09d444/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 04:39:55,934 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94a2d42d-ebea-4c22-b943-426dcf09d444/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 04:39:55,935 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94a2d42d-ebea-4c22-b943-426dcf09d444/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 04:39:56,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:39:56,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 1530 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 04:39:56,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:39:56,179 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 66 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-12-14 04:39:56,179 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 04:39:56,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1152795081] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 04:39:56,179 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 04:39:56,180 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-12-14 04:39:56,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178471102] [2022-12-14 04:39:56,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 04:39:56,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 04:39:56,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 04:39:56,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 04:39:56,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-14 04:39:56,181 INFO L87 Difference]: Start difference. First operand 2260 states and 3676 transitions. Second operand has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2022-12-14 04:39:56,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:39:56,402 INFO L93 Difference]: Finished difference Result 4664 states and 7682 transitions. [2022-12-14 04:39:56,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 04:39:56,402 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 137 [2022-12-14 04:39:56,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:39:56,411 INFO L225 Difference]: With dead ends: 4664 [2022-12-14 04:39:56,411 INFO L226 Difference]: Without dead ends: 2416 [2022-12-14 04:39:56,418 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-12-14 04:39:56,418 INFO L413 NwaCegarLoop]: 461 mSDtfsCounter, 207 mSDsluCounter, 898 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 1359 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 04:39:56,419 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [207 Valid, 1359 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 04:39:56,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2416 states. [2022-12-14 04:39:56,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2416 to 2416. [2022-12-14 04:39:56,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2416 states, 1793 states have (on average 1.645287228109314) internal successors, (2950), 1865 states have internal predecessors, (2950), 479 states have call successors, (479), 137 states have call predecessors, (479), 143 states have return successors, (539), 452 states have call predecessors, (539), 473 states have call successors, (539) [2022-12-14 04:39:56,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2416 states to 2416 states and 3968 transitions. [2022-12-14 04:39:56,542 INFO L78 Accepts]: Start accepts. Automaton has 2416 states and 3968 transitions. Word has length 137 [2022-12-14 04:39:56,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:39:56,542 INFO L495 AbstractCegarLoop]: Abstraction has 2416 states and 3968 transitions. [2022-12-14 04:39:56,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2022-12-14 04:39:56,542 INFO L276 IsEmpty]: Start isEmpty. Operand 2416 states and 3968 transitions. [2022-12-14 04:39:56,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2022-12-14 04:39:56,547 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:39:56,547 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 04:39:56,554 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94a2d42d-ebea-4c22-b943-426dcf09d444/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 04:39:56,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94a2d42d-ebea-4c22-b943-426dcf09d444/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-12-14 04:39:56,748 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 04:39:56,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:39:56,749 INFO L85 PathProgramCache]: Analyzing trace with hash 834521350, now seen corresponding path program 1 times [2022-12-14 04:39:56,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 04:39:56,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713307645] [2022-12-14 04:39:56,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:39:56,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 04:39:56,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:39:56,878 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-12-14 04:39:56,878 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 04:39:56,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713307645] [2022-12-14 04:39:56,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713307645] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 04:39:56,879 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 04:39:56,879 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 04:39:56,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785405320] [2022-12-14 04:39:56,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 04:39:56,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 04:39:56,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 04:39:56,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 04:39:56,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 04:39:56,880 INFO L87 Difference]: Start difference. First operand 2416 states and 3968 transitions. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 2 states have call successors, (20), 1 states have call predecessors, (20), 3 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-12-14 04:39:57,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:39:57,144 INFO L93 Difference]: Finished difference Result 4988 states and 8266 transitions. [2022-12-14 04:39:57,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 04:39:57,145 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 2 states have call successors, (20), 1 states have call predecessors, (20), 3 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 139 [2022-12-14 04:39:57,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:39:57,152 INFO L225 Difference]: With dead ends: 4988 [2022-12-14 04:39:57,152 INFO L226 Difference]: Without dead ends: 2552 [2022-12-14 04:39:57,158 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 04:39:57,158 INFO L413 NwaCegarLoop]: 474 mSDtfsCounter, 99 mSDsluCounter, 898 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 1372 SdHoareTripleChecker+Invalid, 307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 04:39:57,159 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 1372 Invalid, 307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 04:39:57,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2552 states. [2022-12-14 04:39:57,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2552 to 2552. [2022-12-14 04:39:57,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2552 states, 1925 states have (on average 1.5698701298701299) internal successors, (3022), 1997 states have internal predecessors, (3022), 479 states have call successors, (479), 141 states have call predecessors, (479), 147 states have return successors, (539), 452 states have call predecessors, (539), 473 states have call successors, (539) [2022-12-14 04:39:57,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2552 states to 2552 states and 4040 transitions. [2022-12-14 04:39:57,243 INFO L78 Accepts]: Start accepts. Automaton has 2552 states and 4040 transitions. Word has length 139 [2022-12-14 04:39:57,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:39:57,243 INFO L495 AbstractCegarLoop]: Abstraction has 2552 states and 4040 transitions. [2022-12-14 04:39:57,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 2 states have call successors, (20), 1 states have call predecessors, (20), 3 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-12-14 04:39:57,243 INFO L276 IsEmpty]: Start isEmpty. Operand 2552 states and 4040 transitions. [2022-12-14 04:39:57,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2022-12-14 04:39:57,249 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:39:57,249 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 04:39:57,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-14 04:39:57,249 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 04:39:57,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:39:57,250 INFO L85 PathProgramCache]: Analyzing trace with hash 1862305013, now seen corresponding path program 1 times [2022-12-14 04:39:57,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 04:39:57,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148985425] [2022-12-14 04:39:57,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:39:57,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 04:39:57,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:39:57,444 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-12-14 04:39:57,444 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 04:39:57,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148985425] [2022-12-14 04:39:57,444 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148985425] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 04:39:57,444 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 04:39:57,444 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-12-14 04:39:57,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495248993] [2022-12-14 04:39:57,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 04:39:57,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 04:39:57,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 04:39:57,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 04:39:57,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-12-14 04:39:57,446 INFO L87 Difference]: Start difference. First operand 2552 states and 4040 transitions. Second operand has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 6 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) [2022-12-14 04:39:59,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:39:59,608 INFO L93 Difference]: Finished difference Result 6565 states and 10555 transitions. [2022-12-14 04:39:59,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-14 04:39:59,608 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 6 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) Word has length 139 [2022-12-14 04:39:59,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:39:59,621 INFO L225 Difference]: With dead ends: 6565 [2022-12-14 04:39:59,621 INFO L226 Difference]: Without dead ends: 3660 [2022-12-14 04:39:59,631 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2022-12-14 04:39:59,631 INFO L413 NwaCegarLoop]: 463 mSDtfsCounter, 1591 mSDsluCounter, 1552 mSDsCounter, 0 mSdLazyCounter, 4182 mSolverCounterSat, 836 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1648 SdHoareTripleChecker+Valid, 2015 SdHoareTripleChecker+Invalid, 5018 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 836 IncrementalHoareTripleChecker+Valid, 4182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-12-14 04:39:59,631 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1648 Valid, 2015 Invalid, 5018 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [836 Valid, 4182 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-12-14 04:39:59,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3660 states. [2022-12-14 04:39:59,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3660 to 3482. [2022-12-14 04:39:59,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3482 states, 2496 states have (on average 1.4911858974358974) internal successors, (3722), 2626 states have internal predecessors, (3722), 745 states have call successors, (745), 215 states have call predecessors, (745), 240 states have return successors, (928), 697 states have call predecessors, (928), 739 states have call successors, (928) [2022-12-14 04:39:59,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3482 states to 3482 states and 5395 transitions. [2022-12-14 04:39:59,789 INFO L78 Accepts]: Start accepts. Automaton has 3482 states and 5395 transitions. Word has length 139 [2022-12-14 04:39:59,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:39:59,789 INFO L495 AbstractCegarLoop]: Abstraction has 3482 states and 5395 transitions. [2022-12-14 04:39:59,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 6 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) [2022-12-14 04:39:59,790 INFO L276 IsEmpty]: Start isEmpty. Operand 3482 states and 5395 transitions. [2022-12-14 04:39:59,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-12-14 04:39:59,793 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:39:59,793 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 04:39:59,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-12-14 04:39:59,793 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 04:39:59,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:39:59,794 INFO L85 PathProgramCache]: Analyzing trace with hash 600691518, now seen corresponding path program 1 times [2022-12-14 04:39:59,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 04:39:59,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9685175] [2022-12-14 04:39:59,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:39:59,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 04:39:59,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:40:00,754 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 23 proven. 9 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-12-14 04:40:00,755 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 04:40:00,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9685175] [2022-12-14 04:40:00,755 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9685175] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 04:40:00,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465332946] [2022-12-14 04:40:00,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:40:00,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:40:00,755 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94a2d42d-ebea-4c22-b943-426dcf09d444/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 04:40:00,756 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94a2d42d-ebea-4c22-b943-426dcf09d444/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 04:40:00,756 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94a2d42d-ebea-4c22-b943-426dcf09d444/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 04:40:00,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:40:00,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 1533 conjuncts, 50 conjunts are in the unsatisfiable core [2022-12-14 04:40:00,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:40:01,834 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2022-12-14 04:40:01,834 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 04:40:29,532 WARN L233 SmtUtils]: Spent 25.57s on a formula simplification. DAG size of input: 1441 DAG size of output: 51 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-12-14 04:40:56,512 WARN L233 SmtUtils]: Spent 26.00s on a formula simplification. DAG size of input: 1441 DAG size of output: 51 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-12-14 04:40:57,559 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-12-14 04:40:57,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [465332946] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 04:40:57,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [851996895] [2022-12-14 04:40:57,576 INFO L159 IcfgInterpreter]: Started Sifa with 96 locations of interest [2022-12-14 04:40:57,576 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 04:40:57,578 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 04:40:57,582 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 04:40:57,582 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 04:40:59,427 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 578 for LOIs [2022-12-14 04:41:04,052 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift__wrappee__executivefloor with input of size 577 for LOIs [2022-12-14 04:41:09,123 INFO L197 IcfgInterpreter]: Interpreting procedure isPersonOnFloor with input of size 109 for LOIs [2022-12-14 04:41:09,495 INFO L197 IcfgInterpreter]: Interpreting procedure areDoorsOpen with input of size 506 for LOIs [2022-12-14 04:41:09,663 INFO L197 IcfgInterpreter]: Interpreting procedure isExecutiveFloorCalling with input of size 503 for LOIs [2022-12-14 04:41:10,755 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedAtCurrentFloor__wrappee__weight with input of size 444 for LOIs [2022-12-14 04:41:11,497 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 47 for LOIs [2022-12-14 04:41:11,506 INFO L197 IcfgInterpreter]: Interpreting procedure resetCallOnFloor with input of size 84 for LOIs [2022-12-14 04:41:11,521 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 47 for LOIs [2022-12-14 04:41:11,524 INFO L197 IcfgInterpreter]: Interpreting procedure bigMacCall with input of size 579 for LOIs [2022-12-14 04:41:14,714 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 583 for LOIs [2022-12-14 04:41:15,271 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 511 for LOIs [2022-12-14 04:41:15,407 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 04:42:48,444 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '88931#(and (= |old(~floorButtons_2~0)| 0) (= ~executiveFloor~0 4) (= |old(~persons_1~0)| 0) (= |old(~persons_5~0)| 0) (= |old(~doorState~0)| 1) (= |old(~persons_2~0)| 0) (= ~persons_5~0 0) (= |old(~persons_4~0)| 0) (<= |timeShift_isExecutiveFloor_#res#1| 0) (= |old(~floorButtons_0~0)| 0) (<= ~floorButtons_0~0 0) (= |old(~blocked~0)| 0) (<= 1 |timeShift_~tmp~26#1|) (<= ~calls_0~0 0) (= ~head~0.offset 0) (= |old(~weight~0)| 0) (<= |timeShift_isExecutiveFloor_~floorID#1| 0) (<= |timeShift___utac_acc__Specification14_spec__1_~tmp~5#1| 0) (<= 0 (+ 2147483648 |timeShift___utac_acc__Specification14_spec__1_~tmp___2~0#1|)) (= ~persons_4~0 0) (<= 0 |timeShift_isExecutiveFloor_~retValue_acc~26#1|) (<= 0 |timeShift_isExecutiveFloor_#in~floorID#1|) (= ~doorState~0 |timeShift___utac_acc__Specification14_spec__1_~tmp___1~2#1|) (<= |timeShift_isExecutiveFloor_#in~floorID#1| 0) (= ~persons_3~0 0) (= |old(~floorButtons_4~0)| 0) (= |old(~persons_0~0)| 0) (<= 0 |timeShift___utac_acc__Specification14_spec__1_~tmp~5#1|) (<= 0 ~floorButtons_0~0) (<= 0 |timeShift_isExecutiveFloor_#res#1|) (= ~doorState~0 1) (= ~currentFloorID~0 |timeShift___utac_acc__Specification14_spec__1_~tmp~5#1|) (= |timeShift___utac_acc__Specification14_spec__1_~tmp___0~2#1| 0) (<= |timeShift___utac_acc__Specification14_spec__1_~tmp___2~0#1| 2147483647) (<= 0 ~calls_0~0) (= |old(~persons_3~0)| 0) (= ~persons_1~0 0) (= ~persons_0~0 0) (= |old(~floorButtons_3~0)| 0) (<= 0 |timeShift_isExecutiveFloor_~floorID#1|) (= ~head~0.base 0) (= |#NULL.offset| 0) (= ~blocked~0 0) (= |old(~currentHeading~0)| 1) (= |old(~personOnFloor_5_1~0)| 1) (= 1 |old(~calls_1~0)|) (<= |timeShift_~tmp~26#1| 1) (= |old(~floorButtons_1~0)| 0) (= |old(~currentFloorID~0)| 0) (<= 0 |#StackHeapBarrier|) (= ~maximumWeight~0 100) (<= |timeShift_isExecutiveFloor_~retValue_acc~26#1| 0) (= ~cleanupTimeShifts~0 12) (not (= |timeShift___utac_acc__Specification14_spec__1_~tmp___2~0#1| 0)) (= |#NULL.base| 0) (= ~persons_2~0 0))' at error location [2022-12-14 04:42:48,445 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 04:42:48,445 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 04:42:48,445 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20, 16] total 50 [2022-12-14 04:42:48,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458582796] [2022-12-14 04:42:48,445 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 04:42:48,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-12-14 04:42:48,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 04:42:48,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-12-14 04:42:48,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1165, Invalid=11945, Unknown=0, NotChecked=0, Total=13110 [2022-12-14 04:42:48,448 INFO L87 Difference]: Start difference. First operand 3482 states and 5395 transitions. Second operand has 50 states, 38 states have (on average 4.947368421052632) internal successors, (188), 40 states have internal predecessors, (188), 13 states have call successors, (55), 10 states have call predecessors, (55), 21 states have return successors, (54), 21 states have call predecessors, (54), 13 states have call successors, (54) [2022-12-14 04:43:04,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:43:04,811 INFO L93 Difference]: Finished difference Result 11573 states and 18641 transitions. [2022-12-14 04:43:04,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2022-12-14 04:43:04,812 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 38 states have (on average 4.947368421052632) internal successors, (188), 40 states have internal predecessors, (188), 13 states have call successors, (55), 10 states have call predecessors, (55), 21 states have return successors, (54), 21 states have call predecessors, (54), 13 states have call successors, (54) Word has length 140 [2022-12-14 04:43:04,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:43:04,844 INFO L225 Difference]: With dead ends: 11573 [2022-12-14 04:43:04,844 INFO L226 Difference]: Without dead ends: 6460 [2022-12-14 04:43:04,871 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 556 GetRequests, 331 SyntacticMatches, 22 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17515 ImplicationChecksByTransitivity, 98.0s TimeCoverageRelationStatistics Valid=3791, Invalid=38029, Unknown=0, NotChecked=0, Total=41820 [2022-12-14 04:43:04,871 INFO L413 NwaCegarLoop]: 457 mSDtfsCounter, 9020 mSDsluCounter, 6473 mSDsCounter, 0 mSdLazyCounter, 23722 mSolverCounterSat, 7245 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9065 SdHoareTripleChecker+Valid, 6930 SdHoareTripleChecker+Invalid, 30967 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 7245 IncrementalHoareTripleChecker+Valid, 23722 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.4s IncrementalHoareTripleChecker+Time [2022-12-14 04:43:04,871 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9065 Valid, 6930 Invalid, 30967 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [7245 Valid, 23722 Invalid, 0 Unknown, 0 Unchecked, 11.4s Time] [2022-12-14 04:43:04,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6460 states. [2022-12-14 04:43:05,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6460 to 5809. [2022-12-14 04:43:05,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5809 states, 4032 states have (on average 1.3948412698412698) internal successors, (5624), 4297 states have internal predecessors, (5624), 1317 states have call successors, (1317), 399 states have call predecessors, (1317), 459 states have return successors, (1698), 1216 states have call predecessors, (1698), 1311 states have call successors, (1698) [2022-12-14 04:43:05,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5809 states to 5809 states and 8639 transitions. [2022-12-14 04:43:05,282 INFO L78 Accepts]: Start accepts. Automaton has 5809 states and 8639 transitions. Word has length 140 [2022-12-14 04:43:05,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:43:05,282 INFO L495 AbstractCegarLoop]: Abstraction has 5809 states and 8639 transitions. [2022-12-14 04:43:05,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 38 states have (on average 4.947368421052632) internal successors, (188), 40 states have internal predecessors, (188), 13 states have call successors, (55), 10 states have call predecessors, (55), 21 states have return successors, (54), 21 states have call predecessors, (54), 13 states have call successors, (54) [2022-12-14 04:43:05,283 INFO L276 IsEmpty]: Start isEmpty. Operand 5809 states and 8639 transitions. [2022-12-14 04:43:05,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-12-14 04:43:05,289 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:43:05,289 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 04:43:05,295 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94a2d42d-ebea-4c22-b943-426dcf09d444/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-14 04:43:05,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94a2d42d-ebea-4c22-b943-426dcf09d444/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-12-14 04:43:05,490 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 04:43:05,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:43:05,490 INFO L85 PathProgramCache]: Analyzing trace with hash -587615208, now seen corresponding path program 1 times [2022-12-14 04:43:05,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 04:43:05,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593773512] [2022-12-14 04:43:05,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:43:05,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 04:43:05,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:43:05,718 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-12-14 04:43:05,718 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 04:43:05,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593773512] [2022-12-14 04:43:05,718 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593773512] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 04:43:05,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179472175] [2022-12-14 04:43:05,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:43:05,718 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:43:05,718 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94a2d42d-ebea-4c22-b943-426dcf09d444/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 04:43:05,719 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94a2d42d-ebea-4c22-b943-426dcf09d444/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 04:43:05,720 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94a2d42d-ebea-4c22-b943-426dcf09d444/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 04:43:05,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:43:05,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 1547 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 04:43:05,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:43:06,301 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2022-12-14 04:43:06,301 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 04:43:06,301 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [179472175] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 04:43:06,301 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 04:43:06,301 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [8] total 16 [2022-12-14 04:43:06,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918408280] [2022-12-14 04:43:06,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 04:43:06,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-14 04:43:06,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 04:43:06,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-14 04:43:06,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2022-12-14 04:43:06,302 INFO L87 Difference]: Start difference. First operand 5809 states and 8639 transitions. Second operand has 10 states, 9 states have (on average 8.555555555555555) internal successors, (77), 8 states have internal predecessors, (77), 6 states have call successors, (22), 5 states have call predecessors, (22), 6 states have return successors, (21), 7 states have call predecessors, (21), 6 states have call successors, (21) [2022-12-14 04:43:09,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:43:09,393 INFO L93 Difference]: Finished difference Result 13543 states and 20322 transitions. [2022-12-14 04:43:09,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-12-14 04:43:09,394 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 8.555555555555555) internal successors, (77), 8 states have internal predecessors, (77), 6 states have call successors, (22), 5 states have call predecessors, (22), 6 states have return successors, (21), 7 states have call predecessors, (21), 6 states have call successors, (21) Word has length 145 [2022-12-14 04:43:09,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:43:09,418 INFO L225 Difference]: With dead ends: 13543 [2022-12-14 04:43:09,418 INFO L226 Difference]: Without dead ends: 7748 [2022-12-14 04:43:09,435 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=453, Unknown=0, NotChecked=0, Total=552 [2022-12-14 04:43:09,435 INFO L413 NwaCegarLoop]: 412 mSDtfsCounter, 2391 mSDsluCounter, 1099 mSDsCounter, 0 mSdLazyCounter, 4712 mSolverCounterSat, 1462 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2565 SdHoareTripleChecker+Valid, 1511 SdHoareTripleChecker+Invalid, 6174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1462 IncrementalHoareTripleChecker+Valid, 4712 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-12-14 04:43:09,436 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2565 Valid, 1511 Invalid, 6174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1462 Valid, 4712 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-12-14 04:43:09,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7748 states. [2022-12-14 04:43:09,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7748 to 7428. [2022-12-14 04:43:09,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7428 states, 5262 states have (on average 1.3759026985936906) internal successors, (7240), 5556 states have internal predecessors, (7240), 1557 states have call successors, (1557), 539 states have call predecessors, (1557), 608 states have return successors, (1999), 1443 states have call predecessors, (1999), 1549 states have call successors, (1999) [2022-12-14 04:43:09,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7428 states to 7428 states and 10796 transitions. [2022-12-14 04:43:09,896 INFO L78 Accepts]: Start accepts. Automaton has 7428 states and 10796 transitions. Word has length 145 [2022-12-14 04:43:09,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:43:09,896 INFO L495 AbstractCegarLoop]: Abstraction has 7428 states and 10796 transitions. [2022-12-14 04:43:09,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 8.555555555555555) internal successors, (77), 8 states have internal predecessors, (77), 6 states have call successors, (22), 5 states have call predecessors, (22), 6 states have return successors, (21), 7 states have call predecessors, (21), 6 states have call successors, (21) [2022-12-14 04:43:09,897 INFO L276 IsEmpty]: Start isEmpty. Operand 7428 states and 10796 transitions. [2022-12-14 04:43:09,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 434 [2022-12-14 04:43:09,908 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:43:09,909 INFO L195 NwaCegarLoop]: trace histogram [17, 14, 14, 14, 14, 9, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 04:43:09,915 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94a2d42d-ebea-4c22-b943-426dcf09d444/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-14 04:43:10,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94a2d42d-ebea-4c22-b943-426dcf09d444/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-12-14 04:43:10,109 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 04:43:10,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:43:10,110 INFO L85 PathProgramCache]: Analyzing trace with hash -1612408938, now seen corresponding path program 1 times [2022-12-14 04:43:10,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 04:43:10,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672873873] [2022-12-14 04:43:10,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:43:10,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 04:43:10,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:43:10,903 INFO L134 CoverageAnalysis]: Checked inductivity of 1117 backedges. 35 proven. 107 refuted. 0 times theorem prover too weak. 975 trivial. 0 not checked. [2022-12-14 04:43:10,903 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 04:43:10,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672873873] [2022-12-14 04:43:10,903 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672873873] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 04:43:10,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235229789] [2022-12-14 04:43:10,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:43:10,903 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:43:10,903 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94a2d42d-ebea-4c22-b943-426dcf09d444/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 04:43:10,904 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94a2d42d-ebea-4c22-b943-426dcf09d444/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 04:43:10,905 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94a2d42d-ebea-4c22-b943-426dcf09d444/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 04:43:11,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:43:11,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 4519 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 04:43:11,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:43:11,729 INFO L134 CoverageAnalysis]: Checked inductivity of 1117 backedges. 213 proven. 0 refuted. 0 times theorem prover too weak. 904 trivial. 0 not checked. [2022-12-14 04:43:11,729 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 04:43:11,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [235229789] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 04:43:11,730 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 04:43:11,730 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10] total 18 [2022-12-14 04:43:11,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158243566] [2022-12-14 04:43:11,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 04:43:11,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-14 04:43:11,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 04:43:11,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-14 04:43:11,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2022-12-14 04:43:11,732 INFO L87 Difference]: Start difference. First operand 7428 states and 10796 transitions. Second operand has 10 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 4 states have call successors, (41), 3 states have call predecessors, (41), 5 states have return successors, (41), 4 states have call predecessors, (41), 4 states have call successors, (41) [2022-12-14 04:43:13,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:43:13,913 INFO L93 Difference]: Finished difference Result 12638 states and 18311 transitions. [2022-12-14 04:43:13,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-14 04:43:13,914 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 4 states have call successors, (41), 3 states have call predecessors, (41), 5 states have return successors, (41), 4 states have call predecessors, (41), 4 states have call successors, (41) Word has length 433 [2022-12-14 04:43:13,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:43:13,934 INFO L225 Difference]: With dead ends: 12638 [2022-12-14 04:43:13,934 INFO L226 Difference]: Without dead ends: 6554 [2022-12-14 04:43:13,947 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 453 GetRequests, 429 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2022-12-14 04:43:13,948 INFO L413 NwaCegarLoop]: 737 mSDtfsCounter, 1333 mSDsluCounter, 2569 mSDsCounter, 0 mSdLazyCounter, 3687 mSolverCounterSat, 325 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1353 SdHoareTripleChecker+Valid, 3306 SdHoareTripleChecker+Invalid, 4012 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 325 IncrementalHoareTripleChecker+Valid, 3687 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-12-14 04:43:13,948 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1353 Valid, 3306 Invalid, 4012 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [325 Valid, 3687 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-12-14 04:43:13,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6554 states. [2022-12-14 04:43:14,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6554 to 6416. [2022-12-14 04:43:14,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6416 states, 4491 states have (on average 1.3691828100645735) internal successors, (6149), 4726 states have internal predecessors, (6149), 1384 states have call successors, (1384), 505 states have call predecessors, (1384), 540 states have return successors, (1744), 1277 states have call predecessors, (1744), 1376 states have call successors, (1744) [2022-12-14 04:43:14,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6416 states to 6416 states and 9277 transitions. [2022-12-14 04:43:14,372 INFO L78 Accepts]: Start accepts. Automaton has 6416 states and 9277 transitions. Word has length 433 [2022-12-14 04:43:14,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:43:14,372 INFO L495 AbstractCegarLoop]: Abstraction has 6416 states and 9277 transitions. [2022-12-14 04:43:14,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 4 states have call successors, (41), 3 states have call predecessors, (41), 5 states have return successors, (41), 4 states have call predecessors, (41), 4 states have call successors, (41) [2022-12-14 04:43:14,373 INFO L276 IsEmpty]: Start isEmpty. Operand 6416 states and 9277 transitions. [2022-12-14 04:43:14,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2022-12-14 04:43:14,381 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:43:14,381 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 04:43:14,392 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94a2d42d-ebea-4c22-b943-426dcf09d444/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-12-14 04:43:14,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94a2d42d-ebea-4c22-b943-426dcf09d444/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-12-14 04:43:14,582 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 04:43:14,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:43:14,582 INFO L85 PathProgramCache]: Analyzing trace with hash -698164980, now seen corresponding path program 1 times [2022-12-14 04:43:14,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 04:43:14,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607991942] [2022-12-14 04:43:14,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:43:14,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 04:43:14,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:43:14,748 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 27 proven. 22 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2022-12-14 04:43:14,749 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 04:43:14,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607991942] [2022-12-14 04:43:14,749 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607991942] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 04:43:14,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657243722] [2022-12-14 04:43:14,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:43:14,749 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:43:14,749 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94a2d42d-ebea-4c22-b943-426dcf09d444/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 04:43:14,750 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94a2d42d-ebea-4c22-b943-426dcf09d444/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 04:43:14,751 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94a2d42d-ebea-4c22-b943-426dcf09d444/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-14 04:43:15,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:43:15,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 2878 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-14 04:43:15,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:43:15,351 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 93 proven. 0 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2022-12-14 04:43:15,352 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 04:43:15,352 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1657243722] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 04:43:15,352 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 04:43:15,352 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [5] total 12 [2022-12-14 04:43:15,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696831852] [2022-12-14 04:43:15,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 04:43:15,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-14 04:43:15,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 04:43:15,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-14 04:43:15,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2022-12-14 04:43:15,354 INFO L87 Difference]: Start difference. First operand 6416 states and 9277 transitions. Second operand has 9 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 6 states have call successors, (34), 5 states have call predecessors, (34), 6 states have return successors, (32), 7 states have call predecessors, (32), 6 states have call successors, (32) [2022-12-14 04:43:19,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:43:19,559 INFO L93 Difference]: Finished difference Result 15560 states and 23019 transitions. [2022-12-14 04:43:19,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-14 04:43:19,559 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 6 states have call successors, (34), 5 states have call predecessors, (34), 6 states have return successors, (32), 7 states have call predecessors, (32), 6 states have call successors, (32) Word has length 226 [2022-12-14 04:43:19,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:43:19,588 INFO L225 Difference]: With dead ends: 15560 [2022-12-14 04:43:19,588 INFO L226 Difference]: Without dead ends: 9526 [2022-12-14 04:43:19,605 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 223 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2022-12-14 04:43:19,605 INFO L413 NwaCegarLoop]: 517 mSDtfsCounter, 1275 mSDsluCounter, 1693 mSDsCounter, 0 mSdLazyCounter, 5897 mSolverCounterSat, 886 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1458 SdHoareTripleChecker+Valid, 2210 SdHoareTripleChecker+Invalid, 6783 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 886 IncrementalHoareTripleChecker+Valid, 5897 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-12-14 04:43:19,606 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1458 Valid, 2210 Invalid, 6783 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [886 Valid, 5897 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-12-14 04:43:19,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9526 states. [2022-12-14 04:43:20,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9526 to 8350. [2022-12-14 04:43:20,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8350 states, 5749 states have (on average 1.3609323360584449) internal successors, (7824), 6101 states have internal predecessors, (7824), 1928 states have call successors, (1928), 622 states have call predecessors, (1928), 672 states have return successors, (2410), 1821 states have call predecessors, (2410), 1918 states have call successors, (2410) [2022-12-14 04:43:20,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8350 states to 8350 states and 12162 transitions. [2022-12-14 04:43:20,296 INFO L78 Accepts]: Start accepts. Automaton has 8350 states and 12162 transitions. Word has length 226 [2022-12-14 04:43:20,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:43:20,296 INFO L495 AbstractCegarLoop]: Abstraction has 8350 states and 12162 transitions. [2022-12-14 04:43:20,296 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 6 states have call successors, (34), 5 states have call predecessors, (34), 6 states have return successors, (32), 7 states have call predecessors, (32), 6 states have call successors, (32) [2022-12-14 04:43:20,297 INFO L276 IsEmpty]: Start isEmpty. Operand 8350 states and 12162 transitions. [2022-12-14 04:43:20,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2022-12-14 04:43:20,305 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:43:20,305 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 04:43:20,313 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94a2d42d-ebea-4c22-b943-426dcf09d444/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-14 04:43:20,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94a2d42d-ebea-4c22-b943-426dcf09d444/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:43:20,507 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 04:43:20,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:43:20,509 INFO L85 PathProgramCache]: Analyzing trace with hash 530884988, now seen corresponding path program 1 times [2022-12-14 04:43:20,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 04:43:20,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460650795] [2022-12-14 04:43:20,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:43:20,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 04:43:20,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:43:20,707 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 27 proven. 22 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2022-12-14 04:43:20,707 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 04:43:20,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460650795] [2022-12-14 04:43:20,707 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460650795] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 04:43:20,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666426873] [2022-12-14 04:43:20,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:43:20,708 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:43:20,708 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94a2d42d-ebea-4c22-b943-426dcf09d444/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 04:43:20,708 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94a2d42d-ebea-4c22-b943-426dcf09d444/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 04:43:20,709 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94a2d42d-ebea-4c22-b943-426dcf09d444/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-14 04:43:20,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:43:20,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 2878 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-14 04:43:20,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:43:21,231 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 93 proven. 0 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2022-12-14 04:43:21,231 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 04:43:21,231 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [666426873] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 04:43:21,231 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 04:43:21,231 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [5] total 12 [2022-12-14 04:43:21,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593229487] [2022-12-14 04:43:21,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 04:43:21,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-14 04:43:21,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 04:43:21,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-14 04:43:21,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2022-12-14 04:43:21,233 INFO L87 Difference]: Start difference. First operand 8350 states and 12162 transitions. Second operand has 9 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 6 states have call successors, (34), 5 states have call predecessors, (34), 6 states have return successors, (32), 7 states have call predecessors, (32), 6 states have call successors, (32) [2022-12-14 04:43:25,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:43:25,172 INFO L93 Difference]: Finished difference Result 22639 states and 33868 transitions. [2022-12-14 04:43:25,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-14 04:43:25,173 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 6 states have call successors, (34), 5 states have call predecessors, (34), 6 states have return successors, (32), 7 states have call predecessors, (32), 6 states have call successors, (32) Word has length 226 [2022-12-14 04:43:25,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:43:25,219 INFO L225 Difference]: With dead ends: 22639 [2022-12-14 04:43:25,220 INFO L226 Difference]: Without dead ends: 14693 [2022-12-14 04:43:25,245 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 223 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2022-12-14 04:43:25,245 INFO L413 NwaCegarLoop]: 504 mSDtfsCounter, 1489 mSDsluCounter, 1497 mSDsCounter, 0 mSdLazyCounter, 5251 mSolverCounterSat, 1038 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1669 SdHoareTripleChecker+Valid, 2001 SdHoareTripleChecker+Invalid, 6289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1038 IncrementalHoareTripleChecker+Valid, 5251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-12-14 04:43:25,246 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1669 Valid, 2001 Invalid, 6289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1038 Valid, 5251 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-12-14 04:43:25,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14693 states. [2022-12-14 04:43:26,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14693 to 12999. [2022-12-14 04:43:26,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12999 states, 8717 states have (on average 1.3540208787426866) internal successors, (11803), 9327 states have internal predecessors, (11803), 3295 states have call successors, (3295), 898 states have call predecessors, (3295), 986 states have return successors, (4153), 3189 states have call predecessors, (4153), 3281 states have call successors, (4153) [2022-12-14 04:43:26,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12999 states to 12999 states and 19251 transitions. [2022-12-14 04:43:26,299 INFO L78 Accepts]: Start accepts. Automaton has 12999 states and 19251 transitions. Word has length 226 [2022-12-14 04:43:26,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:43:26,299 INFO L495 AbstractCegarLoop]: Abstraction has 12999 states and 19251 transitions. [2022-12-14 04:43:26,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 6 states have call successors, (34), 5 states have call predecessors, (34), 6 states have return successors, (32), 7 states have call predecessors, (32), 6 states have call successors, (32) [2022-12-14 04:43:26,299 INFO L276 IsEmpty]: Start isEmpty. Operand 12999 states and 19251 transitions. [2022-12-14 04:43:26,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2022-12-14 04:43:26,310 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:43:26,310 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 04:43:26,318 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94a2d42d-ebea-4c22-b943-426dcf09d444/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-12-14 04:43:26,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94a2d42d-ebea-4c22-b943-426dcf09d444/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-12-14 04:43:26,512 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 04:43:26,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:43:26,513 INFO L85 PathProgramCache]: Analyzing trace with hash -49802548, now seen corresponding path program 1 times [2022-12-14 04:43:26,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 04:43:26,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851828035] [2022-12-14 04:43:26,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:43:26,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 04:43:26,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:43:26,741 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 27 proven. 22 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2022-12-14 04:43:26,741 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 04:43:26,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851828035] [2022-12-14 04:43:26,741 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851828035] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 04:43:26,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333388672] [2022-12-14 04:43:26,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:43:26,742 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:43:26,742 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94a2d42d-ebea-4c22-b943-426dcf09d444/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 04:43:26,743 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94a2d42d-ebea-4c22-b943-426dcf09d444/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 04:43:26,743 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94a2d42d-ebea-4c22-b943-426dcf09d444/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-14 04:43:27,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:43:27,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 2878 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-14 04:43:27,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:43:27,354 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 93 proven. 0 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2022-12-14 04:43:27,354 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 04:43:27,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1333388672] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 04:43:27,355 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 04:43:27,355 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [5] total 12 [2022-12-14 04:43:27,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600568827] [2022-12-14 04:43:27,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 04:43:27,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-14 04:43:27,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 04:43:27,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-14 04:43:27,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2022-12-14 04:43:27,356 INFO L87 Difference]: Start difference. First operand 12999 states and 19251 transitions. Second operand has 9 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 6 states have call successors, (34), 5 states have call predecessors, (34), 6 states have return successors, (32), 7 states have call predecessors, (32), 6 states have call successors, (32) [2022-12-14 04:43:33,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:43:33,565 INFO L93 Difference]: Finished difference Result 35489 states and 54414 transitions. [2022-12-14 04:43:33,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-14 04:43:33,566 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 6 states have call successors, (34), 5 states have call predecessors, (34), 6 states have return successors, (32), 7 states have call predecessors, (32), 6 states have call successors, (32) Word has length 226 [2022-12-14 04:43:33,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:43:33,655 INFO L225 Difference]: With dead ends: 35489 [2022-12-14 04:43:33,655 INFO L226 Difference]: Without dead ends: 26006 [2022-12-14 04:43:33,689 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 223 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2022-12-14 04:43:33,689 INFO L413 NwaCegarLoop]: 505 mSDtfsCounter, 1528 mSDsluCounter, 1503 mSDsCounter, 0 mSdLazyCounter, 5166 mSolverCounterSat, 1045 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1707 SdHoareTripleChecker+Valid, 2008 SdHoareTripleChecker+Invalid, 6211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1045 IncrementalHoareTripleChecker+Valid, 5166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-12-14 04:43:33,690 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1707 Valid, 2008 Invalid, 6211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1045 Valid, 5166 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-12-14 04:43:33,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26006 states. [2022-12-14 04:43:35,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26006 to 22278. [2022-12-14 04:43:35,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22278 states, 14257 states have (on average 1.349302097215403) internal successors, (19237), 15546 states have internal predecessors, (19237), 6538 states have call successors, (6538), 1294 states have call predecessors, (6538), 1482 states have return successors, (8258), 6444 states have call predecessors, (8258), 6516 states have call successors, (8258) [2022-12-14 04:43:35,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22278 states to 22278 states and 34033 transitions. [2022-12-14 04:43:35,948 INFO L78 Accepts]: Start accepts. Automaton has 22278 states and 34033 transitions. Word has length 226 [2022-12-14 04:43:35,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:43:35,948 INFO L495 AbstractCegarLoop]: Abstraction has 22278 states and 34033 transitions. [2022-12-14 04:43:35,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 6 states have call successors, (34), 5 states have call predecessors, (34), 6 states have return successors, (32), 7 states have call predecessors, (32), 6 states have call successors, (32) [2022-12-14 04:43:35,949 INFO L276 IsEmpty]: Start isEmpty. Operand 22278 states and 34033 transitions. [2022-12-14 04:43:35,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2022-12-14 04:43:35,969 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:43:35,969 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 04:43:35,977 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94a2d42d-ebea-4c22-b943-426dcf09d444/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-14 04:43:36,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94a2d42d-ebea-4c22-b943-426dcf09d444/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-12-14 04:43:36,171 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 04:43:36,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:43:36,172 INFO L85 PathProgramCache]: Analyzing trace with hash -1623256260, now seen corresponding path program 1 times [2022-12-14 04:43:36,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 04:43:36,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256592642] [2022-12-14 04:43:36,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:43:36,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 04:43:36,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:43:36,404 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 27 proven. 22 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2022-12-14 04:43:36,404 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 04:43:36,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256592642] [2022-12-14 04:43:36,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256592642] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 04:43:36,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [733296846] [2022-12-14 04:43:36,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:43:36,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:43:36,405 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94a2d42d-ebea-4c22-b943-426dcf09d444/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 04:43:36,406 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94a2d42d-ebea-4c22-b943-426dcf09d444/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 04:43:36,406 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94a2d42d-ebea-4c22-b943-426dcf09d444/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-14 04:43:36,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:43:36,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 2878 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-14 04:43:36,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:43:37,029 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 93 proven. 0 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2022-12-14 04:43:37,029 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 04:43:37,029 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [733296846] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 04:43:37,029 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 04:43:37,029 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [5] total 12 [2022-12-14 04:43:37,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408898768] [2022-12-14 04:43:37,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 04:43:37,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-14 04:43:37,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 04:43:37,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-14 04:43:37,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2022-12-14 04:43:37,030 INFO L87 Difference]: Start difference. First operand 22278 states and 34033 transitions. Second operand has 9 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 6 states have call successors, (34), 5 states have call predecessors, (34), 6 states have return successors, (32), 7 states have call predecessors, (32), 6 states have call successors, (32) [2022-12-14 04:43:45,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:43:45,875 INFO L93 Difference]: Finished difference Result 72755 states and 115676 transitions. [2022-12-14 04:43:45,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-14 04:43:45,876 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 6 states have call successors, (34), 5 states have call predecessors, (34), 6 states have return successors, (32), 7 states have call predecessors, (32), 6 states have call successors, (32) Word has length 226 [2022-12-14 04:43:45,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:43:46,127 INFO L225 Difference]: With dead ends: 72755 [2022-12-14 04:43:46,127 INFO L226 Difference]: Without dead ends: 54253 [2022-12-14 04:43:46,221 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 223 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2022-12-14 04:43:46,221 INFO L413 NwaCegarLoop]: 509 mSDtfsCounter, 1211 mSDsluCounter, 1709 mSDsCounter, 0 mSdLazyCounter, 5930 mSolverCounterSat, 852 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1395 SdHoareTripleChecker+Valid, 2218 SdHoareTripleChecker+Invalid, 6782 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 852 IncrementalHoareTripleChecker+Valid, 5930 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-12-14 04:43:46,222 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1395 Valid, 2218 Invalid, 6782 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [852 Valid, 5930 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-12-14 04:43:46,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54253 states. [2022-12-14 04:43:50,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54253 to 45373. [2022-12-14 04:43:50,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45373 states, 27340 states have (on average 1.3460497439648866) internal successors, (36801), 30524 states have internal predecessors, (36801), 15444 states have call successors, (15444), 2128 states have call predecessors, (15444), 2588 states have return successors, (19753), 15370 states have call predecessors, (19753), 15406 states have call successors, (19753) [2022-12-14 04:43:50,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45373 states to 45373 states and 71998 transitions. [2022-12-14 04:43:50,729 INFO L78 Accepts]: Start accepts. Automaton has 45373 states and 71998 transitions. Word has length 226 [2022-12-14 04:43:50,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:43:50,729 INFO L495 AbstractCegarLoop]: Abstraction has 45373 states and 71998 transitions. [2022-12-14 04:43:50,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 6 states have call successors, (34), 5 states have call predecessors, (34), 6 states have return successors, (32), 7 states have call predecessors, (32), 6 states have call successors, (32) [2022-12-14 04:43:50,729 INFO L276 IsEmpty]: Start isEmpty. Operand 45373 states and 71998 transitions. [2022-12-14 04:43:50,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2022-12-14 04:43:50,754 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:43:50,754 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 04:43:50,762 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94a2d42d-ebea-4c22-b943-426dcf09d444/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-12-14 04:43:50,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94a2d42d-ebea-4c22-b943-426dcf09d444/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-12-14 04:43:50,956 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 04:43:50,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:43:50,957 INFO L85 PathProgramCache]: Analyzing trace with hash 1083448572, now seen corresponding path program 1 times [2022-12-14 04:43:50,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 04:43:50,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248021087] [2022-12-14 04:43:50,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:43:50,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 04:43:50,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:43:51,138 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 27 proven. 22 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2022-12-14 04:43:51,138 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 04:43:51,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248021087] [2022-12-14 04:43:51,138 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248021087] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 04:43:51,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512907805] [2022-12-14 04:43:51,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:43:51,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:43:51,139 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94a2d42d-ebea-4c22-b943-426dcf09d444/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 04:43:51,139 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94a2d42d-ebea-4c22-b943-426dcf09d444/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 04:43:51,140 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94a2d42d-ebea-4c22-b943-426dcf09d444/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-14 04:43:51,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:43:51,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 2878 conjuncts, 27 conjunts are in the unsatisfiable core [2022-12-14 04:43:51,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:43:52,068 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 110 proven. 6 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2022-12-14 04:43:52,068 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 04:43:55,202 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 27 proven. 33 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2022-12-14 04:43:55,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [512907805] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 04:43:55,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [44217272] [2022-12-14 04:43:55,208 INFO L159 IcfgInterpreter]: Started Sifa with 123 locations of interest [2022-12-14 04:43:55,208 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 04:43:55,208 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 04:43:55,209 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 04:43:55,209 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 04:44:02,326 INFO L197 IcfgInterpreter]: Interpreting procedure cleanup with input of size 569 for LOIs [2022-12-14 04:44:02,753 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 38 for LOIs [2022-12-14 04:44:03,744 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift__wrappee__executivefloor with input of size 182 for LOIs [2022-12-14 04:44:05,117 INFO L197 IcfgInterpreter]: Interpreting procedure isPersonOnFloor with input of size 81 for LOIs [2022-12-14 04:44:05,440 INFO L197 IcfgInterpreter]: Interpreting procedure areDoorsOpen with input of size 31 for LOIs [2022-12-14 04:44:05,442 INFO L197 IcfgInterpreter]: Interpreting procedure isExecutiveFloorCalling with input of size 49 for LOIs [2022-12-14 04:44:05,484 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedAtCurrentFloor__wrappee__weight with input of size 34 for LOIs [2022-12-14 04:44:05,537 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 49 for LOIs [2022-12-14 04:44:05,548 INFO L197 IcfgInterpreter]: Interpreting procedure leaveElevator with input of size 55 for LOIs [2022-12-14 04:44:05,690 INFO L197 IcfgInterpreter]: Interpreting procedure resetCallOnFloor with input of size 55 for LOIs [2022-12-14 04:44:05,701 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 65 for LOIs [2022-12-14 04:44:05,706 INFO L197 IcfgInterpreter]: Interpreting procedure bigMacCall with input of size 579 for LOIs [2022-12-14 04:44:08,962 INFO L197 IcfgInterpreter]: Interpreting procedure getWeight with input of size 36 for LOIs [2022-12-14 04:44:08,971 INFO L197 IcfgInterpreter]: Interpreting procedure getDestination with input of size 35 for LOIs [2022-12-14 04:44:08,981 INFO L197 IcfgInterpreter]: Interpreting procedure bobCall with input of size 521 for LOIs [2022-12-14 04:44:12,042 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 792 for LOIs [2022-12-14 04:44:16,183 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 645 for LOIs [2022-12-14 04:44:16,664 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 04:44:28,553 WARN L233 SmtUtils]: Spent 6.13s on a formula simplification. DAG size of input: 645 DAG size of output: 521 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 04:44:35,030 WARN L233 SmtUtils]: Spent 6.12s on a formula simplification. DAG size of input: 685 DAG size of output: 535 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 04:44:52,711 WARN L233 SmtUtils]: Spent 8.69s on a formula simplification. DAG size of input: 792 DAG size of output: 594 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 04:45:42,653 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '504699#(and (<= 0 (+ 2147483648 |timeShift_~tmp~26#1|)) (<= |old(~doorState~0)| 2147483647) (or (and (= ~executiveFloor~0 4) (= |timeShift_isExecutiveFloor_~retValue_acc~26#1| |timeShift_isExecutiveFloor_#res#1|) (= |timeShift___utac_acc__Specification14_spec__1_~tmp~5#1| |timeShift_isExecutiveFloor_#in~floorID#1|) (= |timeShift_isExecutiveFloor_~floorID#1| |timeShift_isExecutiveFloor_#in~floorID#1|) (= ~head~0.offset 0) (= |timeShift_isExecutiveFloor_~retValue_acc~26#1| (ite (= ~executiveFloor~0 |timeShift_isExecutiveFloor_~floorID#1|) 1 0)) (= ~blocked~0 1) (= ~doorState~0 |timeShift___utac_acc__Specification14_spec__1_~tmp___1~2#1|) (= ~currentFloorID~0 |timeShift___utac_acc__Specification14_spec__1_~tmp~5#1|) (= |timeShift___utac_acc__Specification14_spec__1_~tmp___0~2#1| 0) (= ~cleanupTimeShifts~0 12) (not (= |timeShift___utac_acc__Specification14_spec__1_~tmp___2~0#1| 0)) (= |#NULL.base| 0)) (and (= ~executiveFloor~0 4) (= |timeShift_isExecutiveFloor_~retValue_acc~26#1| |timeShift_isExecutiveFloor_#res#1|) (= ~persons_5~0 0) (= |timeShift___utac_acc__Specification14_spec__1_~tmp~5#1| |timeShift_isExecutiveFloor_#in~floorID#1|) (= |timeShift_isExecutiveFloor_~floorID#1| |timeShift_isExecutiveFloor_#in~floorID#1|) (= ~calls_0~0 0) (= ~head~0.offset 0) (= ~persons_4~0 0) (= ~doorState~0 |timeShift___utac_acc__Specification14_spec__1_~tmp___1~2#1|) (= ~persons_3~0 0) (= ~doorState~0 1) (= ~floorButtons_0~0 0) (= ~currentFloorID~0 |timeShift___utac_acc__Specification14_spec__1_~tmp~5#1|) (= |timeShift___utac_acc__Specification14_spec__1_~tmp___0~2#1| 0) (= ~currentFloorID~0 0) (= ~cleanupTimeShifts~0 12) (not (= |timeShift___utac_acc__Specification14_spec__1_~tmp___2~0#1| 0)) (= |#NULL.base| 0) (= ~persons_2~0 0))) (<= |timeShift_~tmp~26#1| 2147483647) (<= 0 (+ |old(~doorState~0)| 2147483648)) (not (= |timeShift___utac_acc__Specification14_spec__1_~tmp___1~2#1| 0)) (<= 0 (+ 2147483648 |timeShift___utac_acc__Specification14_spec__1_~tmp___2~0#1|)) (<= |#NULL.offset| 0) (<= 0 |old(~blocked~0)|) (<= 0 ~head~0.base) (<= 0 |timeShift_isExecutiveFloor_#res#1|) (<= 0 (+ 2147483648 |timeShift___utac_acc__Specification14_spec__1_~tmp___1~2#1|)) (<= |old(~blocked~0)| 1) (<= ~maximumWeight~0 100) (<= |timeShift___utac_acc__Specification14_spec__1_~tmp___2~0#1| 2147483647) (<= ~head~0.base 0) (<= 0 (+ |timeShift___utac_acc__Specification14_spec__1_~tmp~5#1| 2147483648)) (<= ~doorState~0 2147483647) (<= ~blocked~0 1) (<= |timeShift_isExecutiveFloor_#in~floorID#1| 2147483647) (<= 0 |#NULL.offset|) (<= 0 ~blocked~0) (<= 0 |#StackHeapBarrier|) (<= |timeShift_isExecutiveFloor_~retValue_acc~26#1| 0) (<= 100 ~maximumWeight~0))' at error location [2022-12-14 04:45:42,653 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 04:45:42,653 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 04:45:42,654 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 12, 13] total 27 [2022-12-14 04:45:42,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369799125] [2022-12-14 04:45:42,654 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 04:45:42,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-12-14 04:45:42,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 04:45:42,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-12-14 04:45:42,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1168, Invalid=13352, Unknown=0, NotChecked=0, Total=14520 [2022-12-14 04:45:42,657 INFO L87 Difference]: Start difference. First operand 45373 states and 71998 transitions. Second operand has 27 states, 19 states have (on average 12.473684210526315) internal successors, (237), 22 states have internal predecessors, (237), 20 states have call successors, (87), 10 states have call predecessors, (87), 14 states have return successors, (85), 20 states have call predecessors, (85), 20 states have call successors, (85) [2022-12-14 04:46:55,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:46:55,864 INFO L93 Difference]: Finished difference Result 400829 states and 686049 transitions. [2022-12-14 04:46:55,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-12-14 04:46:55,864 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 19 states have (on average 12.473684210526315) internal successors, (237), 22 states have internal predecessors, (237), 20 states have call successors, (87), 10 states have call predecessors, (87), 14 states have return successors, (85), 20 states have call predecessors, (85), 20 states have call successors, (85) Word has length 226 [2022-12-14 04:46:55,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:46:58,519 INFO L225 Difference]: With dead ends: 400829 [2022-12-14 04:46:58,519 INFO L226 Difference]: Without dead ends: 343049 [2022-12-14 04:46:59,543 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 761 GetRequests, 555 SyntacticMatches, 24 SemanticMatches, 182 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15460 ImplicationChecksByTransitivity, 90.7s TimeCoverageRelationStatistics Valid=2652, Invalid=31020, Unknown=0, NotChecked=0, Total=33672 [2022-12-14 04:46:59,544 INFO L413 NwaCegarLoop]: 1232 mSDtfsCounter, 8386 mSDsluCounter, 8947 mSDsCounter, 0 mSdLazyCounter, 31237 mSolverCounterSat, 8613 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8434 SdHoareTripleChecker+Valid, 10179 SdHoareTripleChecker+Invalid, 39850 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 8613 IncrementalHoareTripleChecker+Valid, 31237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 21.4s IncrementalHoareTripleChecker+Time [2022-12-14 04:46:59,544 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8434 Valid, 10179 Invalid, 39850 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [8613 Valid, 31237 Invalid, 0 Unknown, 0 Unchecked, 21.4s Time] [2022-12-14 04:46:59,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343049 states. [2022-12-14 04:47:34,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343049 to 260652. [2022-12-14 04:47:34,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260652 states, 153076 states have (on average 1.362094645796859) internal successors, (208504), 171680 states have internal predecessors, (208504), 96593 states have call successors, (96593), 8320 states have call predecessors, (96593), 10982 states have return successors, (127176), 85334 states have call predecessors, (127176), 96418 states have call successors, (127176) [2022-12-14 04:47:36,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260652 states to 260652 states and 432273 transitions. [2022-12-14 04:47:36,971 INFO L78 Accepts]: Start accepts. Automaton has 260652 states and 432273 transitions. Word has length 226 [2022-12-14 04:47:36,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:47:36,971 INFO L495 AbstractCegarLoop]: Abstraction has 260652 states and 432273 transitions. [2022-12-14 04:47:36,972 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 19 states have (on average 12.473684210526315) internal successors, (237), 22 states have internal predecessors, (237), 20 states have call successors, (87), 10 states have call predecessors, (87), 14 states have return successors, (85), 20 states have call predecessors, (85), 20 states have call successors, (85) [2022-12-14 04:47:36,972 INFO L276 IsEmpty]: Start isEmpty. Operand 260652 states and 432273 transitions. [2022-12-14 04:47:37,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2022-12-14 04:47:37,016 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:47:37,016 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 04:47:37,026 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94a2d42d-ebea-4c22-b943-426dcf09d444/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-12-14 04:47:37,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94a2d42d-ebea-4c22-b943-426dcf09d444/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:47:37,218 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 04:47:37,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:47:37,219 INFO L85 PathProgramCache]: Analyzing trace with hash -1399567839, now seen corresponding path program 1 times [2022-12-14 04:47:37,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 04:47:37,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953848915] [2022-12-14 04:47:37,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:47:37,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 04:47:37,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:47:37,515 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 7 proven. 16 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2022-12-14 04:47:37,515 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 04:47:37,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953848915] [2022-12-14 04:47:37,515 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953848915] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 04:47:37,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856659614] [2022-12-14 04:47:37,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:47:37,516 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:47:37,516 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94a2d42d-ebea-4c22-b943-426dcf09d444/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 04:47:37,516 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94a2d42d-ebea-4c22-b943-426dcf09d444/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 04:47:37,517 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94a2d42d-ebea-4c22-b943-426dcf09d444/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-14 04:47:37,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:47:37,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 2153 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 04:47:37,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:47:37,966 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 83 proven. 0 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2022-12-14 04:47:37,966 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 04:47:37,966 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [856659614] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 04:47:37,966 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 04:47:37,966 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9] total 17 [2022-12-14 04:47:37,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542861544] [2022-12-14 04:47:37,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 04:47:37,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-14 04:47:37,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 04:47:37,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-14 04:47:37,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2022-12-14 04:47:37,967 INFO L87 Difference]: Start difference. First operand 260652 states and 432273 transitions. Second operand has 10 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 4 states have call successors, (29), 3 states have call predecessors, (29), 5 states have return successors, (30), 4 states have call predecessors, (30), 4 states have call successors, (30) [2022-12-14 04:48:13,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:48:13,803 INFO L93 Difference]: Finished difference Result 443191 states and 763992 transitions. [2022-12-14 04:48:13,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-14 04:48:13,805 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 4 states have call successors, (29), 3 states have call predecessors, (29), 5 states have return successors, (30), 4 states have call predecessors, (30), 4 states have call successors, (30) Word has length 216 [2022-12-14 04:48:13,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:48:15,893 INFO L225 Difference]: With dead ends: 443191 [2022-12-14 04:48:15,893 INFO L226 Difference]: Without dead ends: 259430 [2022-12-14 04:48:17,729 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 212 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2022-12-14 04:48:17,730 INFO L413 NwaCegarLoop]: 743 mSDtfsCounter, 1407 mSDsluCounter, 2585 mSDsCounter, 0 mSdLazyCounter, 3724 mSolverCounterSat, 343 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1427 SdHoareTripleChecker+Valid, 3328 SdHoareTripleChecker+Invalid, 4067 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 343 IncrementalHoareTripleChecker+Valid, 3724 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-12-14 04:48:17,730 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1427 Valid, 3328 Invalid, 4067 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [343 Valid, 3724 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-12-14 04:48:17,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259430 states. [2022-12-14 04:48:49,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259430 to 257167. [2022-12-14 04:48:50,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257167 states, 149591 states have (on average 1.3569198681738874) internal successors, (202983), 168195 states have internal predecessors, (202983), 96593 states have call successors, (96593), 8320 states have call predecessors, (96593), 10982 states have return successors, (127176), 85334 states have call predecessors, (127176), 96418 states have call successors, (127176) [2022-12-14 04:48:52,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257167 states to 257167 states and 426752 transitions. [2022-12-14 04:48:52,415 INFO L78 Accepts]: Start accepts. Automaton has 257167 states and 426752 transitions. Word has length 216 [2022-12-14 04:48:52,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:48:52,416 INFO L495 AbstractCegarLoop]: Abstraction has 257167 states and 426752 transitions. [2022-12-14 04:48:52,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 4 states have call successors, (29), 3 states have call predecessors, (29), 5 states have return successors, (30), 4 states have call predecessors, (30), 4 states have call successors, (30) [2022-12-14 04:48:52,416 INFO L276 IsEmpty]: Start isEmpty. Operand 257167 states and 426752 transitions. [2022-12-14 04:48:52,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2022-12-14 04:48:52,460 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:48:52,461 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 04:48:52,469 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94a2d42d-ebea-4c22-b943-426dcf09d444/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-12-14 04:48:52,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94a2d42d-ebea-4c22-b943-426dcf09d444/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:48:52,662 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 04:48:52,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:48:52,664 INFO L85 PathProgramCache]: Analyzing trace with hash 579969443, now seen corresponding path program 1 times [2022-12-14 04:48:52,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 04:48:52,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924580423] [2022-12-14 04:48:52,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:48:52,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 04:48:52,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:48:52,956 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 7 proven. 16 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2022-12-14 04:48:52,956 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 04:48:52,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924580423] [2022-12-14 04:48:52,956 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924580423] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 04:48:52,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106311396] [2022-12-14 04:48:52,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:48:52,956 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:48:52,956 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94a2d42d-ebea-4c22-b943-426dcf09d444/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 04:48:52,957 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94a2d42d-ebea-4c22-b943-426dcf09d444/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 04:48:52,958 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94a2d42d-ebea-4c22-b943-426dcf09d444/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-14 04:48:53,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:48:53,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 2153 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 04:48:53,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:48:53,368 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 87 proven. 0 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2022-12-14 04:48:53,368 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 04:48:53,368 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2106311396] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 04:48:53,369 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 04:48:53,369 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9] total 17 [2022-12-14 04:48:53,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939962451] [2022-12-14 04:48:53,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 04:48:53,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-14 04:48:53,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 04:48:53,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-14 04:48:53,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2022-12-14 04:48:53,370 INFO L87 Difference]: Start difference. First operand 257167 states and 426752 transitions. Second operand has 10 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 4 states have call successors, (29), 3 states have call predecessors, (29), 5 states have return successors, (30), 4 states have call predecessors, (30), 4 states have call successors, (30) [2022-12-14 04:49:29,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:49:29,064 INFO L93 Difference]: Finished difference Result 436221 states and 752950 transitions. [2022-12-14 04:49:29,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-14 04:49:29,066 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 4 states have call successors, (29), 3 states have call predecessors, (29), 5 states have return successors, (30), 4 states have call predecessors, (30), 4 states have call successors, (30) Word has length 219 [2022-12-14 04:49:29,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:49:30,862 INFO L225 Difference]: With dead ends: 436221 [2022-12-14 04:49:30,862 INFO L226 Difference]: Without dead ends: 255945 [2022-12-14 04:49:32,806 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 215 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2022-12-14 04:49:32,807 INFO L413 NwaCegarLoop]: 743 mSDtfsCounter, 1265 mSDsluCounter, 2573 mSDsCounter, 0 mSdLazyCounter, 3723 mSolverCounterSat, 344 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1285 SdHoareTripleChecker+Valid, 3316 SdHoareTripleChecker+Invalid, 4067 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 344 IncrementalHoareTripleChecker+Valid, 3723 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-12-14 04:49:32,807 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1285 Valid, 3316 Invalid, 4067 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [344 Valid, 3723 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-12-14 04:49:33,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255945 states. [2022-12-14 04:50:05,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255945 to 253682. [2022-12-14 04:50:05,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253682 states, 146106 states have (on average 1.3514982273144156) internal successors, (197462), 164710 states have internal predecessors, (197462), 96593 states have call successors, (96593), 8320 states have call predecessors, (96593), 10982 states have return successors, (127176), 85334 states have call predecessors, (127176), 96418 states have call successors, (127176) [2022-12-14 04:50:07,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253682 states to 253682 states and 421231 transitions. [2022-12-14 04:50:07,851 INFO L78 Accepts]: Start accepts. Automaton has 253682 states and 421231 transitions. Word has length 219 [2022-12-14 04:50:07,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:50:07,852 INFO L495 AbstractCegarLoop]: Abstraction has 253682 states and 421231 transitions. [2022-12-14 04:50:07,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 4 states have call successors, (29), 3 states have call predecessors, (29), 5 states have return successors, (30), 4 states have call predecessors, (30), 4 states have call successors, (30) [2022-12-14 04:50:07,852 INFO L276 IsEmpty]: Start isEmpty. Operand 253682 states and 421231 transitions. [2022-12-14 04:50:07,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 363 [2022-12-14 04:50:07,897 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:50:07,897 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 11, 11, 8, 6, 6, 6, 6, 6, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 04:50:07,903 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94a2d42d-ebea-4c22-b943-426dcf09d444/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-12-14 04:50:08,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94a2d42d-ebea-4c22-b943-426dcf09d444/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-12-14 04:50:08,098 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 04:50:08,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:50:08,099 INFO L85 PathProgramCache]: Analyzing trace with hash 382836613, now seen corresponding path program 1 times [2022-12-14 04:50:08,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 04:50:08,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044079441] [2022-12-14 04:50:08,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:50:08,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 04:50:08,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:50:08,661 INFO L134 CoverageAnalysis]: Checked inductivity of 731 backedges. 29 proven. 74 refuted. 0 times theorem prover too weak. 628 trivial. 0 not checked. [2022-12-14 04:50:08,662 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 04:50:08,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044079441] [2022-12-14 04:50:08,662 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044079441] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 04:50:08,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322831765] [2022-12-14 04:50:08,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:50:08,662 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:50:08,662 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94a2d42d-ebea-4c22-b943-426dcf09d444/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 04:50:08,663 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94a2d42d-ebea-4c22-b943-426dcf09d444/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 04:50:08,663 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94a2d42d-ebea-4c22-b943-426dcf09d444/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-12-14 04:50:09,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:50:09,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 3861 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 04:50:09,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:50:09,581 INFO L134 CoverageAnalysis]: Checked inductivity of 731 backedges. 175 proven. 0 refuted. 0 times theorem prover too weak. 556 trivial. 0 not checked. [2022-12-14 04:50:09,581 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 04:50:09,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [322831765] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 04:50:09,581 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 04:50:09,581 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10] total 18 [2022-12-14 04:50:09,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220729256] [2022-12-14 04:50:09,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 04:50:09,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-14 04:50:09,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 04:50:09,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-14 04:50:09,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2022-12-14 04:50:09,583 INFO L87 Difference]: Start difference. First operand 253682 states and 421231 transitions. Second operand has 10 states, 8 states have (on average 13.375) internal successors, (107), 8 states have internal predecessors, (107), 4 states have call successors, (36), 3 states have call predecessors, (36), 5 states have return successors, (36), 4 states have call predecessors, (36), 4 states have call successors, (36) [2022-12-14 04:50:45,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:50:45,353 INFO L93 Difference]: Finished difference Result 429251 states and 741908 transitions. [2022-12-14 04:50:45,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-14 04:50:45,354 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 13.375) internal successors, (107), 8 states have internal predecessors, (107), 4 states have call successors, (36), 3 states have call predecessors, (36), 5 states have return successors, (36), 4 states have call predecessors, (36), 4 states have call successors, (36) Word has length 362 [2022-12-14 04:50:45,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:50:47,328 INFO L225 Difference]: With dead ends: 429251 [2022-12-14 04:50:47,328 INFO L226 Difference]: Without dead ends: 252460 [2022-12-14 04:50:49,175 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 382 GetRequests, 358 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2022-12-14 04:50:49,175 INFO L413 NwaCegarLoop]: 743 mSDtfsCounter, 1152 mSDsluCounter, 2561 mSDsCounter, 0 mSdLazyCounter, 3722 mSolverCounterSat, 222 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1172 SdHoareTripleChecker+Valid, 3304 SdHoareTripleChecker+Invalid, 3944 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 222 IncrementalHoareTripleChecker+Valid, 3722 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-12-14 04:50:49,176 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1172 Valid, 3304 Invalid, 3944 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [222 Valid, 3722 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-12-14 04:50:49,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252460 states. [2022-12-14 04:51:21,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252460 to 250197. [2022-12-14 04:51:22,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250197 states, 142621 states have (on average 1.345811626618801) internal successors, (191941), 161225 states have internal predecessors, (191941), 96593 states have call successors, (96593), 8320 states have call predecessors, (96593), 10982 states have return successors, (127176), 85334 states have call predecessors, (127176), 96418 states have call successors, (127176) [2022-12-14 04:51:24,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250197 states to 250197 states and 415710 transitions. [2022-12-14 04:51:24,325 INFO L78 Accepts]: Start accepts. Automaton has 250197 states and 415710 transitions. Word has length 362 [2022-12-14 04:51:24,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:51:24,326 INFO L495 AbstractCegarLoop]: Abstraction has 250197 states and 415710 transitions. [2022-12-14 04:51:24,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 13.375) internal successors, (107), 8 states have internal predecessors, (107), 4 states have call successors, (36), 3 states have call predecessors, (36), 5 states have return successors, (36), 4 states have call predecessors, (36), 4 states have call successors, (36) [2022-12-14 04:51:24,326 INFO L276 IsEmpty]: Start isEmpty. Operand 250197 states and 415710 transitions. [2022-12-14 04:51:24,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 443 [2022-12-14 04:51:24,376 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:51:24,376 INFO L195 NwaCegarLoop]: trace histogram [17, 14, 14, 14, 14, 9, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 04:51:24,384 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94a2d42d-ebea-4c22-b943-426dcf09d444/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-12-14 04:51:24,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94a2d42d-ebea-4c22-b943-426dcf09d444/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:51:24,577 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 04:51:24,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:51:24,577 INFO L85 PathProgramCache]: Analyzing trace with hash -1146802008, now seen corresponding path program 1 times [2022-12-14 04:51:24,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 04:51:24,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920594860] [2022-12-14 04:51:24,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:51:24,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 04:51:24,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat