./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec3_product09.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b5237d83 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2224b52f-815e-45dc-afc3-1830222808db/bin/utaipan-g80aRyZoba/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2224b52f-815e-45dc-afc3-1830222808db/bin/utaipan-g80aRyZoba/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2224b52f-815e-45dc-afc3-1830222808db/bin/utaipan-g80aRyZoba/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2224b52f-815e-45dc-afc3-1830222808db/bin/utaipan-g80aRyZoba/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec3_product09.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2224b52f-815e-45dc-afc3-1830222808db/bin/utaipan-g80aRyZoba/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2224b52f-815e-45dc-afc3-1830222808db/bin/utaipan-g80aRyZoba --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 67b10dcf95f436cfd8f02a55d7d1d272656f1382a4eb6ab4ad3bba992e95e024 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-b5237d8 [2022-11-22 02:22:37,015 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-22 02:22:37,017 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-22 02:22:37,038 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-22 02:22:37,039 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-22 02:22:37,040 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-22 02:22:37,042 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-22 02:22:37,044 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-22 02:22:37,046 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-22 02:22:37,047 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-22 02:22:37,049 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-22 02:22:37,050 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-22 02:22:37,051 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-22 02:22:37,052 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-22 02:22:37,054 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-22 02:22:37,055 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-22 02:22:37,056 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-22 02:22:37,057 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-22 02:22:37,059 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-22 02:22:37,062 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-22 02:22:37,064 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-22 02:22:37,065 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-22 02:22:37,067 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-22 02:22:37,068 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-22 02:22:37,072 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-22 02:22:37,073 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-22 02:22:37,073 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-22 02:22:37,074 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-22 02:22:37,075 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-22 02:22:37,076 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-22 02:22:37,077 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-22 02:22:37,078 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-22 02:22:37,079 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-22 02:22:37,080 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-22 02:22:37,081 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-22 02:22:37,082 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-22 02:22:37,083 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-22 02:22:37,083 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-22 02:22:37,084 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-22 02:22:37,085 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-22 02:22:37,086 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-22 02:22:37,087 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2224b52f-815e-45dc-afc3-1830222808db/bin/utaipan-g80aRyZoba/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-22 02:22:37,112 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-22 02:22:37,112 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-22 02:22:37,113 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-22 02:22:37,113 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-22 02:22:37,114 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-22 02:22:37,114 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-22 02:22:37,114 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-22 02:22:37,115 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-22 02:22:37,115 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-22 02:22:37,115 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-22 02:22:37,116 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-22 02:22:37,116 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-22 02:22:37,116 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-22 02:22:37,117 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-22 02:22:37,117 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-22 02:22:37,117 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-22 02:22:37,117 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-22 02:22:37,118 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-22 02:22:37,119 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-22 02:22:37,119 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-22 02:22:37,119 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-22 02:22:37,119 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-22 02:22:37,120 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-22 02:22:37,120 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-22 02:22:37,120 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-22 02:22:37,120 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-22 02:22:37,121 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-22 02:22:37,121 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-22 02:22:37,121 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-22 02:22:37,122 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-22 02:22:37,122 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-22 02:22:37,122 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-22 02:22:37,122 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 02:22:37,123 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-22 02:22:37,123 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-22 02:22:37,123 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-22 02:22:37,123 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-22 02:22:37,124 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-22 02:22:37,124 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-22 02:22:37,124 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-22 02:22:37,124 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-22 02:22:37,125 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_2224b52f-815e-45dc-afc3-1830222808db/bin/utaipan-g80aRyZoba/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2224b52f-815e-45dc-afc3-1830222808db/bin/utaipan-g80aRyZoba Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 67b10dcf95f436cfd8f02a55d7d1d272656f1382a4eb6ab4ad3bba992e95e024 [2022-11-22 02:22:37,427 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-22 02:22:37,452 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-22 02:22:37,456 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-22 02:22:37,457 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-22 02:22:37,458 INFO L275 PluginConnector]: CDTParser initialized [2022-11-22 02:22:37,459 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2224b52f-815e-45dc-afc3-1830222808db/bin/utaipan-g80aRyZoba/../../sv-benchmarks/c/product-lines/elevator_spec3_product09.cil.c [2022-11-22 02:22:40,759 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-22 02:22:41,216 INFO L351 CDTParser]: Found 1 translation units. [2022-11-22 02:22:41,217 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2224b52f-815e-45dc-afc3-1830222808db/sv-benchmarks/c/product-lines/elevator_spec3_product09.cil.c [2022-11-22 02:22:41,265 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2224b52f-815e-45dc-afc3-1830222808db/bin/utaipan-g80aRyZoba/data/7d916cf0b/3feced352fec46ef8688742f3fafd33c/FLAG428d8a7a5 [2022-11-22 02:22:41,291 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2224b52f-815e-45dc-afc3-1830222808db/bin/utaipan-g80aRyZoba/data/7d916cf0b/3feced352fec46ef8688742f3fafd33c [2022-11-22 02:22:41,296 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-22 02:22:41,299 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-22 02:22:41,305 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-22 02:22:41,305 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-22 02:22:41,310 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-22 02:22:41,311 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 02:22:41" (1/1) ... [2022-11-22 02:22:41,312 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@424a67a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:22:41, skipping insertion in model container [2022-11-22 02:22:41,313 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 02:22:41" (1/1) ... [2022-11-22 02:22:41,322 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-22 02:22:41,428 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-22 02:22:41,799 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_2224b52f-815e-45dc-afc3-1830222808db/sv-benchmarks/c/product-lines/elevator_spec3_product09.cil.c[21710,21723] [2022-11-22 02:22:42,085 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 02:22:42,099 INFO L203 MainTranslator]: Completed pre-run [2022-11-22 02:22:42,143 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_2224b52f-815e-45dc-afc3-1830222808db/sv-benchmarks/c/product-lines/elevator_spec3_product09.cil.c[21710,21723] [2022-11-22 02:22:42,223 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 02:22:42,249 INFO L208 MainTranslator]: Completed translation [2022-11-22 02:22:42,250 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:22:42 WrapperNode [2022-11-22 02:22:42,250 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-22 02:22:42,251 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-22 02:22:42,252 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-22 02:22:42,252 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-22 02:22:42,260 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:22:42" (1/1) ... [2022-11-22 02:22:42,284 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:22:42" (1/1) ... [2022-11-22 02:22:42,329 INFO L138 Inliner]: procedures = 87, calls = 336, calls flagged for inlining = 23, calls inlined = 20, statements flattened = 808 [2022-11-22 02:22:42,330 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-22 02:22:42,330 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-22 02:22:42,331 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-22 02:22:42,331 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-22 02:22:42,342 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:22:42" (1/1) ... [2022-11-22 02:22:42,349 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:22:42" (1/1) ... [2022-11-22 02:22:42,355 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:22:42" (1/1) ... [2022-11-22 02:22:42,356 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:22:42" (1/1) ... [2022-11-22 02:22:42,404 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:22:42" (1/1) ... [2022-11-22 02:22:42,423 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:22:42" (1/1) ... [2022-11-22 02:22:42,443 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:22:42" (1/1) ... [2022-11-22 02:22:42,447 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:22:42" (1/1) ... [2022-11-22 02:22:42,467 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-22 02:22:42,468 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-22 02:22:42,468 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-22 02:22:42,468 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-22 02:22:42,469 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:22:42" (1/1) ... [2022-11-22 02:22:42,476 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 02:22:42,490 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2224b52f-815e-45dc-afc3-1830222808db/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:22:42,505 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2224b52f-815e-45dc-afc3-1830222808db/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-22 02:22:42,518 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2224b52f-815e-45dc-afc3-1830222808db/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-22 02:22:42,558 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-22 02:22:42,559 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2022-11-22 02:22:42,559 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2022-11-22 02:22:42,559 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2022-11-22 02:22:42,560 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2022-11-22 02:22:42,560 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2022-11-22 02:22:42,560 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2022-11-22 02:22:42,560 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2022-11-22 02:22:42,560 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2022-11-22 02:22:42,561 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2022-11-22 02:22:42,561 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2022-11-22 02:22:42,561 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2022-11-22 02:22:42,561 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2022-11-22 02:22:42,562 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2022-11-22 02:22:42,562 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2022-11-22 02:22:42,562 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2022-11-22 02:22:42,562 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2022-11-22 02:22:42,563 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2022-11-22 02:22:42,563 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2022-11-22 02:22:42,563 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2022-11-22 02:22:42,563 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2022-11-22 02:22:42,563 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2022-11-22 02:22:42,564 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2022-11-22 02:22:42,564 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2022-11-22 02:22:42,564 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2022-11-22 02:22:42,564 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2022-11-22 02:22:42,565 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2022-11-22 02:22:42,565 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2022-11-22 02:22:42,565 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2022-11-22 02:22:42,565 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2022-11-22 02:22:42,566 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2022-11-22 02:22:42,566 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2022-11-22 02:22:42,566 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2022-11-22 02:22:42,566 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2022-11-22 02:22:42,566 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2022-11-22 02:22:42,567 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2022-11-22 02:22:42,567 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2022-11-22 02:22:42,567 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-22 02:22:42,567 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2022-11-22 02:22:42,567 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2022-11-22 02:22:42,568 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2022-11-22 02:22:42,568 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2022-11-22 02:22:42,568 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2022-11-22 02:22:42,568 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2022-11-22 02:22:42,569 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2022-11-22 02:22:42,569 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2022-11-22 02:22:42,569 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-22 02:22:42,569 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-22 02:22:42,570 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2022-11-22 02:22:42,570 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2022-11-22 02:22:42,730 INFO L235 CfgBuilder]: Building ICFG [2022-11-22 02:22:42,733 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-22 02:22:44,063 INFO L276 CfgBuilder]: Performing block encoding [2022-11-22 02:22:44,990 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-22 02:22:44,991 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-22 02:22:44,996 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 02:22:44 BoogieIcfgContainer [2022-11-22 02:22:44,997 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-22 02:22:45,001 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-22 02:22:45,001 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-22 02:22:45,005 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-22 02:22:45,006 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 02:22:41" (1/3) ... [2022-11-22 02:22:45,008 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@124aa954 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 02:22:45, skipping insertion in model container [2022-11-22 02:22:45,008 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:22:42" (2/3) ... [2022-11-22 02:22:45,010 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@124aa954 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 02:22:45, skipping insertion in model container [2022-11-22 02:22:45,010 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 02:22:44" (3/3) ... [2022-11-22 02:22:45,015 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec3_product09.cil.c [2022-11-22 02:22:45,039 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-22 02:22:45,040 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-22 02:22:45,142 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-22 02:22:45,155 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;@16741ebd, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-22 02:22:45,156 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-22 02:22:45,165 INFO L276 IsEmpty]: Start isEmpty. Operand has 377 states, 254 states have (on average 1.5984251968503937) internal successors, (406), 272 states have internal predecessors, (406), 98 states have call successors, (98), 23 states have call predecessors, (98), 23 states have return successors, (98), 95 states have call predecessors, (98), 98 states have call successors, (98) [2022-11-22 02:22:45,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-22 02:22:45,203 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:22:45,204 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:22:45,205 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:22:45,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:22:45,215 INFO L85 PathProgramCache]: Analyzing trace with hash 13643139, now seen corresponding path program 1 times [2022-11-22 02:22:45,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:22:45,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145573418] [2022-11-22 02:22:45,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:22:45,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:22:45,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:22:46,276 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 02:22:46,277 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:22:46,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145573418] [2022-11-22 02:22:46,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145573418] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:22:46,278 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:22:46,278 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-22 02:22:46,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579059682] [2022-11-22 02:22:46,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:22:46,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 02:22:46,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:22:46,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 02:22:46,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 02:22:46,324 INFO L87 Difference]: Start difference. First operand has 377 states, 254 states have (on average 1.5984251968503937) internal successors, (406), 272 states have internal predecessors, (406), 98 states have call successors, (98), 23 states have call predecessors, (98), 23 states have return successors, (98), 95 states have call predecessors, (98), 98 states have call successors, (98) Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 4 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-11-22 02:22:47,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:22:47,493 INFO L93 Difference]: Finished difference Result 1069 states and 1731 transitions. [2022-11-22 02:22:47,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 02:22:47,497 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 4 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 63 [2022-11-22 02:22:47,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:22:47,535 INFO L225 Difference]: With dead ends: 1069 [2022-11-22 02:22:47,535 INFO L226 Difference]: Without dead ends: 694 [2022-11-22 02:22:47,548 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-22 02:22:47,559 INFO L413 NwaCegarLoop]: 618 mSDtfsCounter, 511 mSDsluCounter, 1113 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 513 SdHoareTripleChecker+Valid, 1731 SdHoareTripleChecker+Invalid, 460 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-22 02:22:47,560 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [513 Valid, 1731 Invalid, 460 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [153 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-22 02:22:47,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 694 states. [2022-11-22 02:22:47,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 694 to 686. [2022-11-22 02:22:47,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 686 states, 465 states have (on average 1.5225806451612902) internal successors, (708), 495 states have internal predecessors, (708), 180 states have call successors, (180), 43 states have call predecessors, (180), 40 states have return successors, (181), 172 states have call predecessors, (181), 176 states have call successors, (181) [2022-11-22 02:22:47,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 686 states to 686 states and 1069 transitions. [2022-11-22 02:22:47,762 INFO L78 Accepts]: Start accepts. Automaton has 686 states and 1069 transitions. Word has length 63 [2022-11-22 02:22:47,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:22:47,764 INFO L495 AbstractCegarLoop]: Abstraction has 686 states and 1069 transitions. [2022-11-22 02:22:47,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 4 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-11-22 02:22:47,766 INFO L276 IsEmpty]: Start isEmpty. Operand 686 states and 1069 transitions. [2022-11-22 02:22:47,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-22 02:22:47,776 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:22:47,783 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:22:47,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-22 02:22:47,784 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:22:47,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:22:47,785 INFO L85 PathProgramCache]: Analyzing trace with hash 19520656, now seen corresponding path program 1 times [2022-11-22 02:22:47,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:22:47,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335213198] [2022-11-22 02:22:47,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:22:47,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:22:47,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:22:48,247 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 02:22:48,247 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:22:48,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335213198] [2022-11-22 02:22:48,249 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335213198] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:22:48,249 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:22:48,249 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-22 02:22:48,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396553113] [2022-11-22 02:22:48,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:22:48,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 02:22:48,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:22:48,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 02:22:48,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 02:22:48,255 INFO L87 Difference]: Start difference. First operand 686 states and 1069 transitions. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-22 02:22:48,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:22:48,688 INFO L93 Difference]: Finished difference Result 1320 states and 2107 transitions. [2022-11-22 02:22:48,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 02:22:48,689 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 68 [2022-11-22 02:22:48,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:22:48,702 INFO L225 Difference]: With dead ends: 1320 [2022-11-22 02:22:48,703 INFO L226 Difference]: Without dead ends: 876 [2022-11-22 02:22:48,712 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-22 02:22:48,715 INFO L413 NwaCegarLoop]: 620 mSDtfsCounter, 139 mSDsluCounter, 1127 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 1747 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-22 02:22:48,716 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 1747 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-22 02:22:48,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 876 states. [2022-11-22 02:22:48,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 876 to 690. [2022-11-22 02:22:48,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 690 states, 469 states have (on average 1.5181236673773988) internal successors, (712), 499 states have internal predecessors, (712), 180 states have call successors, (180), 43 states have call predecessors, (180), 40 states have return successors, (181), 172 states have call predecessors, (181), 176 states have call successors, (181) [2022-11-22 02:22:48,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 690 states to 690 states and 1073 transitions. [2022-11-22 02:22:48,840 INFO L78 Accepts]: Start accepts. Automaton has 690 states and 1073 transitions. Word has length 68 [2022-11-22 02:22:48,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:22:48,842 INFO L495 AbstractCegarLoop]: Abstraction has 690 states and 1073 transitions. [2022-11-22 02:22:48,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-22 02:22:48,842 INFO L276 IsEmpty]: Start isEmpty. Operand 690 states and 1073 transitions. [2022-11-22 02:22:48,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-11-22 02:22:48,844 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:22:48,845 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-22 02:22:48,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-22 02:22:48,846 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:22:48,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:22:48,858 INFO L85 PathProgramCache]: Analyzing trace with hash 1309187174, now seen corresponding path program 1 times [2022-11-22 02:22:48,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:22:48,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663674272] [2022-11-22 02:22:48,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:22:48,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:22:48,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:22:49,455 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-22 02:22:49,455 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:22:49,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663674272] [2022-11-22 02:22:49,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663674272] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:22:49,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367603689] [2022-11-22 02:22:49,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:22:49,457 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:22:49,457 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2224b52f-815e-45dc-afc3-1830222808db/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:22:49,461 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2224b52f-815e-45dc-afc3-1830222808db/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:22:49,469 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2224b52f-815e-45dc-afc3-1830222808db/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-22 02:22:49,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:22:49,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 1542 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-22 02:22:49,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:22:50,129 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 02:22:50,130 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:22:50,130 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1367603689] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:22:50,131 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 02:22:50,131 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2022-11-22 02:22:50,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754265112] [2022-11-22 02:22:50,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:22:50,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 02:22:50,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:22:50,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 02:22:50,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-11-22 02:22:50,134 INFO L87 Difference]: Start difference. First operand 690 states and 1073 transitions. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 4 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) [2022-11-22 02:22:51,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:22:51,018 INFO L93 Difference]: Finished difference Result 1143 states and 1781 transitions. [2022-11-22 02:22:51,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 02:22:51,019 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 4 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) Word has length 72 [2022-11-22 02:22:51,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:22:51,028 INFO L225 Difference]: With dead ends: 1143 [2022-11-22 02:22:51,028 INFO L226 Difference]: Without dead ends: 698 [2022-11-22 02:22:51,032 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-11-22 02:22:51,035 INFO L413 NwaCegarLoop]: 687 mSDtfsCounter, 420 mSDsluCounter, 1608 mSDsCounter, 0 mSdLazyCounter, 491 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 427 SdHoareTripleChecker+Valid, 2295 SdHoareTripleChecker+Invalid, 496 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-22 02:22:51,037 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [427 Valid, 2295 Invalid, 496 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 491 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-22 02:22:51,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 698 states. [2022-11-22 02:22:51,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 698 to 694. [2022-11-22 02:22:51,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 694 states, 471 states have (on average 1.515923566878981) internal successors, (714), 502 states have internal predecessors, (714), 180 states have call successors, (180), 44 states have call predecessors, (180), 42 states have return successors, (182), 172 states have call predecessors, (182), 176 states have call successors, (182) [2022-11-22 02:22:51,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 694 states to 694 states and 1076 transitions. [2022-11-22 02:22:51,091 INFO L78 Accepts]: Start accepts. Automaton has 694 states and 1076 transitions. Word has length 72 [2022-11-22 02:22:51,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:22:51,091 INFO L495 AbstractCegarLoop]: Abstraction has 694 states and 1076 transitions. [2022-11-22 02:22:51,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 4 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) [2022-11-22 02:22:51,092 INFO L276 IsEmpty]: Start isEmpty. Operand 694 states and 1076 transitions. [2022-11-22 02:22:51,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-22 02:22:51,094 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:22:51,094 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-22 02:22:51,109 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2224b52f-815e-45dc-afc3-1830222808db/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-22 02:22:51,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2224b52f-815e-45dc-afc3-1830222808db/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:22:51,304 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:22:51,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:22:51,305 INFO L85 PathProgramCache]: Analyzing trace with hash 1183509830, now seen corresponding path program 1 times [2022-11-22 02:22:51,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:22:51,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213420564] [2022-11-22 02:22:51,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:22:51,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:22:51,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:22:51,801 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-22 02:22:51,802 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:22:51,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213420564] [2022-11-22 02:22:51,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213420564] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:22:51,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367128377] [2022-11-22 02:22:51,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:22:51,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:22:51,803 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2224b52f-815e-45dc-afc3-1830222808db/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:22:51,805 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2224b52f-815e-45dc-afc3-1830222808db/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:22:51,826 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2224b52f-815e-45dc-afc3-1830222808db/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-22 02:22:52,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:22:52,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 1531 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-22 02:22:52,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:22:52,303 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 02:22:52,303 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:22:52,304 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1367128377] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:22:52,305 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 02:22:52,306 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2022-11-22 02:22:52,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028031] [2022-11-22 02:22:52,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:22:52,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 02:22:52,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:22:52,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 02:22:52,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-22 02:22:52,315 INFO L87 Difference]: Start difference. First operand 694 states and 1076 transitions. Second operand has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-22 02:22:52,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:22:52,632 INFO L93 Difference]: Finished difference Result 1242 states and 1958 transitions. [2022-11-22 02:22:52,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 02:22:52,633 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 73 [2022-11-22 02:22:52,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:22:52,638 INFO L225 Difference]: With dead ends: 1242 [2022-11-22 02:22:52,638 INFO L226 Difference]: Without dead ends: 694 [2022-11-22 02:22:52,645 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-11-22 02:22:52,648 INFO L413 NwaCegarLoop]: 598 mSDtfsCounter, 269 mSDsluCounter, 946 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 280 SdHoareTripleChecker+Valid, 1544 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 02:22:52,650 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [280 Valid, 1544 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 02:22:52,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 694 states. [2022-11-22 02:22:52,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 694 to 694. [2022-11-22 02:22:52,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 694 states, 471 states have (on average 1.4861995753715498) internal successors, (700), 502 states have internal predecessors, (700), 180 states have call successors, (180), 44 states have call predecessors, (180), 42 states have return successors, (182), 172 states have call predecessors, (182), 176 states have call successors, (182) [2022-11-22 02:22:52,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 694 states to 694 states and 1062 transitions. [2022-11-22 02:22:52,710 INFO L78 Accepts]: Start accepts. Automaton has 694 states and 1062 transitions. Word has length 73 [2022-11-22 02:22:52,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:22:52,711 INFO L495 AbstractCegarLoop]: Abstraction has 694 states and 1062 transitions. [2022-11-22 02:22:52,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-22 02:22:52,711 INFO L276 IsEmpty]: Start isEmpty. Operand 694 states and 1062 transitions. [2022-11-22 02:22:52,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-11-22 02:22:52,713 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:22:52,714 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-22 02:22:52,729 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2224b52f-815e-45dc-afc3-1830222808db/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-22 02:22:52,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2224b52f-815e-45dc-afc3-1830222808db/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:22:52,923 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:22:52,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:22:52,924 INFO L85 PathProgramCache]: Analyzing trace with hash 2120738951, now seen corresponding path program 1 times [2022-11-22 02:22:52,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:22:52,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817667524] [2022-11-22 02:22:52,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:22:52,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:22:52,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:22:53,501 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-22 02:22:53,501 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:22:53,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817667524] [2022-11-22 02:22:53,502 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817667524] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:22:53,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [323626903] [2022-11-22 02:22:53,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:22:53,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:22:53,503 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2224b52f-815e-45dc-afc3-1830222808db/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:22:53,504 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2224b52f-815e-45dc-afc3-1830222808db/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:22:53,534 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2224b52f-815e-45dc-afc3-1830222808db/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-22 02:22:53,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:22:53,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 1541 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-22 02:22:53,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:22:54,256 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-22 02:22:54,257 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:22:54,665 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-22 02:22:54,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [323626903] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-22 02:22:54,665 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-22 02:22:54,666 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [6, 9] total 16 [2022-11-22 02:22:54,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124031110] [2022-11-22 02:22:54,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:22:54,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-22 02:22:54,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:22:54,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-22 02:22:54,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2022-11-22 02:22:54,668 INFO L87 Difference]: Start difference. First operand 694 states and 1062 transitions. Second operand has 9 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 4 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (13), 4 states have call predecessors, (13), 3 states have call successors, (13) [2022-11-22 02:22:59,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:22:59,163 INFO L93 Difference]: Finished difference Result 1635 states and 2612 transitions. [2022-11-22 02:22:59,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-22 02:22:59,164 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 4 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (13), 4 states have call predecessors, (13), 3 states have call successors, (13) Word has length 75 [2022-11-22 02:22:59,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:22:59,181 INFO L225 Difference]: With dead ends: 1635 [2022-11-22 02:22:59,181 INFO L226 Difference]: Without dead ends: 1275 [2022-11-22 02:22:59,185 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 144 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=145, Invalid=725, Unknown=0, NotChecked=0, Total=870 [2022-11-22 02:22:59,188 INFO L413 NwaCegarLoop]: 671 mSDtfsCounter, 2828 mSDsluCounter, 2152 mSDsCounter, 0 mSdLazyCounter, 2443 mSolverCounterSat, 1315 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2907 SdHoareTripleChecker+Valid, 2823 SdHoareTripleChecker+Invalid, 3758 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1315 IncrementalHoareTripleChecker+Valid, 2443 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2022-11-22 02:22:59,189 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2907 Valid, 2823 Invalid, 3758 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1315 Valid, 2443 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2022-11-22 02:22:59,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1275 states. [2022-11-22 02:22:59,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1275 to 1205. [2022-11-22 02:22:59,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1205 states, 838 states have (on average 1.5023866348448687) internal successors, (1259), 885 states have internal predecessors, (1259), 292 states have call successors, (292), 73 states have call predecessors, (292), 74 states have return successors, (329), 282 states have call predecessors, (329), 287 states have call successors, (329) [2022-11-22 02:22:59,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1205 states to 1205 states and 1880 transitions. [2022-11-22 02:22:59,321 INFO L78 Accepts]: Start accepts. Automaton has 1205 states and 1880 transitions. Word has length 75 [2022-11-22 02:22:59,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:22:59,323 INFO L495 AbstractCegarLoop]: Abstraction has 1205 states and 1880 transitions. [2022-11-22 02:22:59,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 4 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (13), 4 states have call predecessors, (13), 3 states have call successors, (13) [2022-11-22 02:22:59,324 INFO L276 IsEmpty]: Start isEmpty. Operand 1205 states and 1880 transitions. [2022-11-22 02:22:59,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-11-22 02:22:59,327 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:22:59,327 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-22 02:22:59,342 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2224b52f-815e-45dc-afc3-1830222808db/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-11-22 02:22:59,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2224b52f-815e-45dc-afc3-1830222808db/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:22:59,536 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:22:59,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:22:59,537 INFO L85 PathProgramCache]: Analyzing trace with hash 2022540589, now seen corresponding path program 1 times [2022-11-22 02:22:59,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:22:59,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354269020] [2022-11-22 02:22:59,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:22:59,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:22:59,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:23:00,029 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-22 02:23:00,030 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:23:00,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354269020] [2022-11-22 02:23:00,030 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354269020] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:23:00,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783344018] [2022-11-22 02:23:00,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:23:00,031 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:23:00,031 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2224b52f-815e-45dc-afc3-1830222808db/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:23:00,035 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2224b52f-815e-45dc-afc3-1830222808db/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:23:00,054 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2224b52f-815e-45dc-afc3-1830222808db/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-22 02:23:00,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:23:00,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 1542 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-22 02:23:00,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:23:00,561 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 02:23:00,561 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:23:00,562 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [783344018] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:23:00,562 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 02:23:00,562 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-22 02:23:00,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29792272] [2022-11-22 02:23:00,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:23:00,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 02:23:00,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:23:00,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 02:23:00,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-22 02:23:00,569 INFO L87 Difference]: Start difference. First operand 1205 states and 1880 transitions. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-11-22 02:23:00,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:23:00,918 INFO L93 Difference]: Finished difference Result 3440 states and 5513 transitions. [2022-11-22 02:23:00,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 02:23:00,918 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 76 [2022-11-22 02:23:00,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:23:00,936 INFO L225 Difference]: With dead ends: 3440 [2022-11-22 02:23:00,936 INFO L226 Difference]: Without dead ends: 2247 [2022-11-22 02:23:00,945 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-22 02:23:00,946 INFO L413 NwaCegarLoop]: 808 mSDtfsCounter, 459 mSDsluCounter, 533 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 459 SdHoareTripleChecker+Valid, 1341 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:23:00,947 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [459 Valid, 1341 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 02:23:00,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2247 states. [2022-11-22 02:23:01,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2247 to 2191. [2022-11-22 02:23:01,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2191 states, 1534 states have (on average 1.5097783572359844) internal successors, (2316), 1629 states have internal predecessors, (2316), 516 states have call successors, (516), 131 states have call predecessors, (516), 140 states have return successors, (608), 502 states have call predecessors, (608), 511 states have call successors, (608) [2022-11-22 02:23:01,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2191 states to 2191 states and 3440 transitions. [2022-11-22 02:23:01,238 INFO L78 Accepts]: Start accepts. Automaton has 2191 states and 3440 transitions. Word has length 76 [2022-11-22 02:23:01,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:23:01,239 INFO L495 AbstractCegarLoop]: Abstraction has 2191 states and 3440 transitions. [2022-11-22 02:23:01,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-11-22 02:23:01,240 INFO L276 IsEmpty]: Start isEmpty. Operand 2191 states and 3440 transitions. [2022-11-22 02:23:01,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-11-22 02:23:01,250 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:23:01,250 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-22 02:23:01,265 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2224b52f-815e-45dc-afc3-1830222808db/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-22 02:23:01,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2224b52f-815e-45dc-afc3-1830222808db/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-22 02:23:01,460 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:23:01,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:23:01,461 INFO L85 PathProgramCache]: Analyzing trace with hash 152698590, now seen corresponding path program 1 times [2022-11-22 02:23:01,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:23:01,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862285291] [2022-11-22 02:23:01,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:23:01,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:23:01,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:23:01,915 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-22 02:23:01,916 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:23:01,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862285291] [2022-11-22 02:23:01,916 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862285291] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:23:01,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908167480] [2022-11-22 02:23:01,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:23:01,917 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:23:01,917 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2224b52f-815e-45dc-afc3-1830222808db/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:23:01,918 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2224b52f-815e-45dc-afc3-1830222808db/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:23:01,948 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2224b52f-815e-45dc-afc3-1830222808db/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-22 02:23:02,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:23:02,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 1531 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-22 02:23:02,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:23:02,483 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 02:23:02,483 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:23:02,484 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [908167480] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:23:02,484 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 02:23:02,484 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2022-11-22 02:23:02,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695355792] [2022-11-22 02:23:02,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:23:02,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 02:23:02,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:23:02,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 02:23:02,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-11-22 02:23:02,488 INFO L87 Difference]: Start difference. First operand 2191 states and 3440 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2022-11-22 02:23:02,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:23:02,923 INFO L93 Difference]: Finished difference Result 5112 states and 8137 transitions. [2022-11-22 02:23:02,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 02:23:02,924 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 75 [2022-11-22 02:23:02,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:23:02,954 INFO L225 Difference]: With dead ends: 5112 [2022-11-22 02:23:02,954 INFO L226 Difference]: Without dead ends: 2933 [2022-11-22 02:23:02,975 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-11-22 02:23:02,977 INFO L413 NwaCegarLoop]: 621 mSDtfsCounter, 521 mSDsluCounter, 459 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 521 SdHoareTripleChecker+Valid, 1080 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:23:02,977 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [521 Valid, 1080 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 02:23:02,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2933 states. [2022-11-22 02:23:03,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2933 to 2889. [2022-11-22 02:23:03,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2889 states, 2035 states have (on average 1.517936117936118) internal successors, (3089), 2162 states have internal predecessors, (3089), 669 states have call successors, (669), 170 states have call predecessors, (669), 184 states have return successors, (797), 652 states have call predecessors, (797), 664 states have call successors, (797) [2022-11-22 02:23:03,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2889 states to 2889 states and 4555 transitions. [2022-11-22 02:23:03,345 INFO L78 Accepts]: Start accepts. Automaton has 2889 states and 4555 transitions. Word has length 75 [2022-11-22 02:23:03,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:23:03,346 INFO L495 AbstractCegarLoop]: Abstraction has 2889 states and 4555 transitions. [2022-11-22 02:23:03,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2022-11-22 02:23:03,347 INFO L276 IsEmpty]: Start isEmpty. Operand 2889 states and 4555 transitions. [2022-11-22 02:23:03,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-11-22 02:23:03,350 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:23:03,350 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-22 02:23:03,364 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2224b52f-815e-45dc-afc3-1830222808db/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-11-22 02:23:03,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2224b52f-815e-45dc-afc3-1830222808db/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-22 02:23:03,559 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:23:03,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:23:03,560 INFO L85 PathProgramCache]: Analyzing trace with hash -154683306, now seen corresponding path program 1 times [2022-11-22 02:23:03,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:23:03,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328477269] [2022-11-22 02:23:03,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:23:03,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:23:03,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:23:04,069 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-22 02:23:04,070 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:23:04,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328477269] [2022-11-22 02:23:04,070 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328477269] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:23:04,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728078948] [2022-11-22 02:23:04,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:23:04,071 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:23:04,071 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2224b52f-815e-45dc-afc3-1830222808db/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:23:04,072 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2224b52f-815e-45dc-afc3-1830222808db/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:23:04,094 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2224b52f-815e-45dc-afc3-1830222808db/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-22 02:23:04,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:23:04,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 1558 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-22 02:23:04,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:23:04,622 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-22 02:23:04,622 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:23:04,622 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [728078948] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:23:04,623 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 02:23:04,623 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2022-11-22 02:23:04,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011932388] [2022-11-22 02:23:04,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:23:04,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 02:23:04,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:23:04,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 02:23:04,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-22 02:23:04,624 INFO L87 Difference]: Start difference. First operand 2889 states and 4555 transitions. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 4 states have call successors, (16), 3 states have call predecessors, (16), 4 states have return successors, (14), 3 states have call predecessors, (14), 4 states have call successors, (14) [2022-11-22 02:23:05,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:23:05,492 INFO L93 Difference]: Finished difference Result 5184 states and 8208 transitions. [2022-11-22 02:23:05,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-22 02:23:05,493 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 4 states have call successors, (16), 3 states have call predecessors, (16), 4 states have return successors, (14), 3 states have call predecessors, (14), 4 states have call successors, (14) Word has length 79 [2022-11-22 02:23:05,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:23:05,514 INFO L225 Difference]: With dead ends: 5184 [2022-11-22 02:23:05,514 INFO L226 Difference]: Without dead ends: 2897 [2022-11-22 02:23:05,530 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-11-22 02:23:05,530 INFO L413 NwaCegarLoop]: 714 mSDtfsCounter, 396 mSDsluCounter, 1799 mSDsCounter, 0 mSdLazyCounter, 340 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 396 SdHoareTripleChecker+Valid, 2513 SdHoareTripleChecker+Invalid, 346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-22 02:23:05,531 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [396 Valid, 2513 Invalid, 346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 340 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-22 02:23:05,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2897 states. [2022-11-22 02:23:05,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2897 to 2889. [2022-11-22 02:23:05,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2889 states, 2035 states have (on average 1.517936117936118) internal successors, (3089), 2162 states have internal predecessors, (3089), 669 states have call successors, (669), 170 states have call predecessors, (669), 184 states have return successors, (793), 652 states have call predecessors, (793), 664 states have call successors, (793) [2022-11-22 02:23:05,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2889 states to 2889 states and 4551 transitions. [2022-11-22 02:23:05,874 INFO L78 Accepts]: Start accepts. Automaton has 2889 states and 4551 transitions. Word has length 79 [2022-11-22 02:23:05,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:23:05,875 INFO L495 AbstractCegarLoop]: Abstraction has 2889 states and 4551 transitions. [2022-11-22 02:23:05,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 4 states have call successors, (16), 3 states have call predecessors, (16), 4 states have return successors, (14), 3 states have call predecessors, (14), 4 states have call successors, (14) [2022-11-22 02:23:05,876 INFO L276 IsEmpty]: Start isEmpty. Operand 2889 states and 4551 transitions. [2022-11-22 02:23:05,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-11-22 02:23:05,881 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:23:05,881 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-22 02:23:05,896 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2224b52f-815e-45dc-afc3-1830222808db/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-22 02:23:06,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2224b52f-815e-45dc-afc3-1830222808db/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:23:06,097 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:23:06,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:23:06,097 INFO L85 PathProgramCache]: Analyzing trace with hash 1242674534, now seen corresponding path program 1 times [2022-11-22 02:23:06,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:23:06,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780017074] [2022-11-22 02:23:06,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:23:06,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:23:06,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:23:06,603 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-22 02:23:06,603 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:23:06,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780017074] [2022-11-22 02:23:06,604 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780017074] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:23:06,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51041769] [2022-11-22 02:23:06,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:23:06,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:23:06,604 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2224b52f-815e-45dc-afc3-1830222808db/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:23:06,605 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2224b52f-815e-45dc-afc3-1830222808db/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:23:06,612 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2224b52f-815e-45dc-afc3-1830222808db/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-22 02:23:07,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:23:07,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 1630 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-22 02:23:07,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:23:07,102 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-22 02:23:07,102 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:23:07,102 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [51041769] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:23:07,103 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 02:23:07,103 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2022-11-22 02:23:07,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377433515] [2022-11-22 02:23:07,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:23:07,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 02:23:07,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:23:07,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 02:23:07,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-22 02:23:07,105 INFO L87 Difference]: Start difference. First operand 2889 states and 4551 transitions. Second operand has 5 states, 5 states have (on average 11.4) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 3 states have call predecessors, (18), 2 states have call successors, (18) [2022-11-22 02:23:07,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:23:07,525 INFO L93 Difference]: Finished difference Result 5459 states and 8715 transitions. [2022-11-22 02:23:07,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 02:23:07,526 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 3 states have call predecessors, (18), 2 states have call successors, (18) Word has length 99 [2022-11-22 02:23:07,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:23:07,552 INFO L225 Difference]: With dead ends: 5459 [2022-11-22 02:23:07,553 INFO L226 Difference]: Without dead ends: 3010 [2022-11-22 02:23:07,569 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-22 02:23:07,572 INFO L413 NwaCegarLoop]: 560 mSDtfsCounter, 13 mSDsluCounter, 1648 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 2208 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 02:23:07,572 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 2208 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 02:23:07,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3010 states. [2022-11-22 02:23:07,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3010 to 2933. [2022-11-22 02:23:07,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2933 states, 2065 states have (on average 1.510411622276029) internal successors, (3119), 2198 states have internal predecessors, (3119), 669 states have call successors, (669), 170 states have call predecessors, (669), 198 states have return successors, (833), 660 states have call predecessors, (833), 664 states have call successors, (833) [2022-11-22 02:23:07,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2933 states to 2933 states and 4621 transitions. [2022-11-22 02:23:07,821 INFO L78 Accepts]: Start accepts. Automaton has 2933 states and 4621 transitions. Word has length 99 [2022-11-22 02:23:07,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:23:07,822 INFO L495 AbstractCegarLoop]: Abstraction has 2933 states and 4621 transitions. [2022-11-22 02:23:07,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 3 states have call predecessors, (18), 2 states have call successors, (18) [2022-11-22 02:23:07,822 INFO L276 IsEmpty]: Start isEmpty. Operand 2933 states and 4621 transitions. [2022-11-22 02:23:07,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-11-22 02:23:07,830 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:23:07,830 INFO L195 NwaCegarLoop]: trace histogram [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, 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] [2022-11-22 02:23:07,839 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2224b52f-815e-45dc-afc3-1830222808db/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-22 02:23:08,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2224b52f-815e-45dc-afc3-1830222808db/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:23:08,038 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:23:08,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:23:08,039 INFO L85 PathProgramCache]: Analyzing trace with hash -997829384, now seen corresponding path program 1 times [2022-11-22 02:23:08,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:23:08,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740594368] [2022-11-22 02:23:08,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:23:08,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:23:08,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:23:08,564 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 19 proven. 2 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-22 02:23:08,564 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:23:08,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740594368] [2022-11-22 02:23:08,565 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740594368] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:23:08,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470338962] [2022-11-22 02:23:08,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:23:08,565 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:23:08,566 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2224b52f-815e-45dc-afc3-1830222808db/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:23:08,583 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2224b52f-815e-45dc-afc3-1830222808db/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:23:08,602 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2224b52f-815e-45dc-afc3-1830222808db/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-22 02:23:09,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:23:09,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 1862 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-22 02:23:09,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:23:09,168 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-22 02:23:09,168 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:23:09,168 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1470338962] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:23:09,169 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 02:23:09,169 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2022-11-22 02:23:09,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781067240] [2022-11-22 02:23:09,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:23:09,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 02:23:09,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:23:09,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 02:23:09,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-22 02:23:09,171 INFO L87 Difference]: Start difference. First operand 2933 states and 4621 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 3 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2022-11-22 02:23:09,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:23:09,632 INFO L93 Difference]: Finished difference Result 6625 states and 10624 transitions. [2022-11-22 02:23:09,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 02:23:09,633 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 3 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) Word has length 117 [2022-11-22 02:23:09,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:23:09,666 INFO L225 Difference]: With dead ends: 6625 [2022-11-22 02:23:09,666 INFO L226 Difference]: Without dead ends: 3704 [2022-11-22 02:23:09,688 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-22 02:23:09,689 INFO L413 NwaCegarLoop]: 820 mSDtfsCounter, 529 mSDsluCounter, 462 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 529 SdHoareTripleChecker+Valid, 1282 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:23:09,690 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [529 Valid, 1282 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 02:23:09,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3704 states. [2022-11-22 02:23:10,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3704 to 3648. [2022-11-22 02:23:10,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3648 states, 2578 states have (on average 1.512412723041117) internal successors, (3899), 2745 states have internal predecessors, (3899), 825 states have call successors, (825), 207 states have call predecessors, (825), 244 states have return successors, (1037), 815 states have call predecessors, (1037), 820 states have call successors, (1037) [2022-11-22 02:23:10,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3648 states to 3648 states and 5761 transitions. [2022-11-22 02:23:10,072 INFO L78 Accepts]: Start accepts. Automaton has 3648 states and 5761 transitions. Word has length 117 [2022-11-22 02:23:10,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:23:10,072 INFO L495 AbstractCegarLoop]: Abstraction has 3648 states and 5761 transitions. [2022-11-22 02:23:10,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 3 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2022-11-22 02:23:10,073 INFO L276 IsEmpty]: Start isEmpty. Operand 3648 states and 5761 transitions. [2022-11-22 02:23:10,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-11-22 02:23:10,081 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:23:10,082 INFO L195 NwaCegarLoop]: trace histogram [4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:23:10,098 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2224b52f-815e-45dc-afc3-1830222808db/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-22 02:23:10,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2224b52f-815e-45dc-afc3-1830222808db/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-22 02:23:10,292 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:23:10,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:23:10,293 INFO L85 PathProgramCache]: Analyzing trace with hash -1659991831, now seen corresponding path program 1 times [2022-11-22 02:23:10,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:23:10,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256991785] [2022-11-22 02:23:10,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:23:10,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:23:10,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:23:10,770 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 22 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-22 02:23:10,770 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:23:10,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256991785] [2022-11-22 02:23:10,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256991785] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:23:10,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451127632] [2022-11-22 02:23:10,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:23:10,772 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:23:10,772 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2224b52f-815e-45dc-afc3-1830222808db/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:23:10,775 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2224b52f-815e-45dc-afc3-1830222808db/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:23:10,798 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2224b52f-815e-45dc-afc3-1830222808db/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-22 02:23:11,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:23:11,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 1874 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-22 02:23:11,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:23:11,299 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 02:23:11,299 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:23:11,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [451127632] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:23:11,300 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 02:23:11,300 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2022-11-22 02:23:11,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921378199] [2022-11-22 02:23:11,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:23:11,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 02:23:11,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:23:11,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 02:23:11,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-22 02:23:11,316 INFO L87 Difference]: Start difference. First operand 3648 states and 5761 transitions. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 3 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) [2022-11-22 02:23:11,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:23:11,813 INFO L93 Difference]: Finished difference Result 7340 states and 11753 transitions. [2022-11-22 02:23:11,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 02:23:11,815 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 3 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) Word has length 118 [2022-11-22 02:23:11,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:23:11,849 INFO L225 Difference]: With dead ends: 7340 [2022-11-22 02:23:11,849 INFO L226 Difference]: Without dead ends: 3704 [2022-11-22 02:23:11,873 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-22 02:23:11,873 INFO L413 NwaCegarLoop]: 959 mSDtfsCounter, 459 mSDsluCounter, 533 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 459 SdHoareTripleChecker+Valid, 1492 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:23:11,874 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [459 Valid, 1492 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 02:23:11,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3704 states. [2022-11-22 02:23:12,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3704 to 3648. [2022-11-22 02:23:12,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3648 states, 2578 states have (on average 1.5096974398758727) internal successors, (3892), 2745 states have internal predecessors, (3892), 825 states have call successors, (825), 207 states have call predecessors, (825), 244 states have return successors, (1037), 815 states have call predecessors, (1037), 820 states have call successors, (1037) [2022-11-22 02:23:12,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3648 states to 3648 states and 5754 transitions. [2022-11-22 02:23:12,224 INFO L78 Accepts]: Start accepts. Automaton has 3648 states and 5754 transitions. Word has length 118 [2022-11-22 02:23:12,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:23:12,225 INFO L495 AbstractCegarLoop]: Abstraction has 3648 states and 5754 transitions. [2022-11-22 02:23:12,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 3 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) [2022-11-22 02:23:12,226 INFO L276 IsEmpty]: Start isEmpty. Operand 3648 states and 5754 transitions. [2022-11-22 02:23:12,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-11-22 02:23:12,234 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:23:12,234 INFO L195 NwaCegarLoop]: trace histogram [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, 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] [2022-11-22 02:23:12,251 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2224b52f-815e-45dc-afc3-1830222808db/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-22 02:23:12,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2224b52f-815e-45dc-afc3-1830222808db/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-22 02:23:12,445 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:23:12,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:23:12,446 INFO L85 PathProgramCache]: Analyzing trace with hash 774985050, now seen corresponding path program 1 times [2022-11-22 02:23:12,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:23:12,446 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513600801] [2022-11-22 02:23:12,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:23:12,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:23:12,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:23:12,873 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-22 02:23:12,873 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:23:12,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513600801] [2022-11-22 02:23:12,874 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513600801] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:23:12,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432321863] [2022-11-22 02:23:12,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:23:12,874 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:23:12,875 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2224b52f-815e-45dc-afc3-1830222808db/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:23:12,876 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2224b52f-815e-45dc-afc3-1830222808db/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:23:12,902 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2224b52f-815e-45dc-afc3-1830222808db/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-22 02:23:13,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:23:13,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 1863 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-22 02:23:13,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:23:13,505 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 02:23:13,505 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:23:13,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1432321863] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:23:13,506 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 02:23:13,506 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10] total 16 [2022-11-22 02:23:13,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372106736] [2022-11-22 02:23:13,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:23:13,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-22 02:23:13,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:23:13,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-22 02:23:13,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2022-11-22 02:23:13,508 INFO L87 Difference]: Start difference. First operand 3648 states and 5754 transitions. Second operand has 8 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 5 states have call successors, (21), 4 states have call predecessors, (21), 5 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) [2022-11-22 02:23:17,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:23:17,970 INFO L93 Difference]: Finished difference Result 8197 states and 13092 transitions. [2022-11-22 02:23:17,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-22 02:23:17,971 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 5 states have call successors, (21), 4 states have call predecessors, (21), 5 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) Word has length 117 [2022-11-22 02:23:17,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:23:18,004 INFO L225 Difference]: With dead ends: 8197 [2022-11-22 02:23:18,010 INFO L226 Difference]: Without dead ends: 4435 [2022-11-22 02:23:18,025 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=107, Invalid=595, Unknown=0, NotChecked=0, Total=702 [2022-11-22 02:23:18,027 INFO L413 NwaCegarLoop]: 404 mSDtfsCounter, 1604 mSDsluCounter, 1124 mSDsCounter, 0 mSdLazyCounter, 3630 mSolverCounterSat, 1043 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1635 SdHoareTripleChecker+Valid, 1528 SdHoareTripleChecker+Invalid, 4673 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1043 IncrementalHoareTripleChecker+Valid, 3630 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-11-22 02:23:18,027 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1635 Valid, 1528 Invalid, 4673 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1043 Valid, 3630 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2022-11-22 02:23:18,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4435 states. [2022-11-22 02:23:18,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4435 to 3643. [2022-11-22 02:23:18,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3643 states, 2573 states have (on average 1.5102992615623785) internal successors, (3886), 2740 states have internal predecessors, (3886), 825 states have call successors, (825), 207 states have call predecessors, (825), 244 states have return successors, (1037), 815 states have call predecessors, (1037), 820 states have call successors, (1037) [2022-11-22 02:23:18,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3643 states to 3643 states and 5748 transitions. [2022-11-22 02:23:18,349 INFO L78 Accepts]: Start accepts. Automaton has 3643 states and 5748 transitions. Word has length 117 [2022-11-22 02:23:18,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:23:18,350 INFO L495 AbstractCegarLoop]: Abstraction has 3643 states and 5748 transitions. [2022-11-22 02:23:18,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 5 states have call successors, (21), 4 states have call predecessors, (21), 5 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) [2022-11-22 02:23:18,350 INFO L276 IsEmpty]: Start isEmpty. Operand 3643 states and 5748 transitions. [2022-11-22 02:23:18,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-11-22 02:23:18,359 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:23:18,359 INFO L195 NwaCegarLoop]: trace histogram [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, 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] [2022-11-22 02:23:18,370 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2224b52f-815e-45dc-afc3-1830222808db/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-22 02:23:18,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2224b52f-815e-45dc-afc3-1830222808db/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:23:18,569 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:23:18,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:23:18,570 INFO L85 PathProgramCache]: Analyzing trace with hash -834393372, now seen corresponding path program 1 times [2022-11-22 02:23:18,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:23:18,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398038336] [2022-11-22 02:23:18,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:23:18,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:23:18,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:23:18,996 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 25 proven. 3 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-22 02:23:18,997 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:23:18,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398038336] [2022-11-22 02:23:18,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398038336] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:23:18,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354735701] [2022-11-22 02:23:18,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:23:18,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:23:18,998 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2224b52f-815e-45dc-afc3-1830222808db/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:23:18,999 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2224b52f-815e-45dc-afc3-1830222808db/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:23:19,007 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2224b52f-815e-45dc-afc3-1830222808db/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-22 02:23:19,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:23:19,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 1889 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-22 02:23:19,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:23:19,500 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-22 02:23:19,500 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:23:19,500 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1354735701] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:23:19,500 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 02:23:19,501 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 10 [2022-11-22 02:23:19,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533788462] [2022-11-22 02:23:19,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:23:19,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 02:23:19,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:23:19,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 02:23:19,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-22 02:23:19,503 INFO L87 Difference]: Start difference. First operand 3643 states and 5748 transitions. Second operand has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 4 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2022-11-22 02:23:21,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:23:21,133 INFO L93 Difference]: Finished difference Result 7538 states and 12125 transitions. [2022-11-22 02:23:21,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 02:23:21,134 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 4 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) Word has length 123 [2022-11-22 02:23:21,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:23:21,193 INFO L225 Difference]: With dead ends: 7538 [2022-11-22 02:23:21,193 INFO L226 Difference]: Without dead ends: 4514 [2022-11-22 02:23:21,214 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2022-11-22 02:23:21,215 INFO L413 NwaCegarLoop]: 598 mSDtfsCounter, 673 mSDsluCounter, 574 mSDsCounter, 0 mSdLazyCounter, 606 mSolverCounterSat, 162 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 728 SdHoareTripleChecker+Valid, 1172 SdHoareTripleChecker+Invalid, 768 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 162 IncrementalHoareTripleChecker+Valid, 606 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:23:21,215 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [728 Valid, 1172 Invalid, 768 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [162 Valid, 606 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-22 02:23:21,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4514 states. [2022-11-22 02:23:21,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4514 to 4401. [2022-11-22 02:23:21,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4401 states, 3011 states have (on average 1.4985054799070077) internal successors, (4512), 3226 states have internal predecessors, (4512), 1081 states have call successors, (1081), 279 states have call predecessors, (1081), 308 states have return successors, (1351), 1063 states have call predecessors, (1351), 1074 states have call successors, (1351) [2022-11-22 02:23:21,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4401 states to 4401 states and 6944 transitions. [2022-11-22 02:23:21,693 INFO L78 Accepts]: Start accepts. Automaton has 4401 states and 6944 transitions. Word has length 123 [2022-11-22 02:23:21,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:23:21,696 INFO L495 AbstractCegarLoop]: Abstraction has 4401 states and 6944 transitions. [2022-11-22 02:23:21,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 4 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2022-11-22 02:23:21,697 INFO L276 IsEmpty]: Start isEmpty. Operand 4401 states and 6944 transitions. [2022-11-22 02:23:21,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-22 02:23:21,707 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:23:21,707 INFO L195 NwaCegarLoop]: trace histogram [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, 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] [2022-11-22 02:23:21,724 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2224b52f-815e-45dc-afc3-1830222808db/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-22 02:23:21,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2224b52f-815e-45dc-afc3-1830222808db/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-22 02:23:21,919 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:23:21,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:23:21,920 INFO L85 PathProgramCache]: Analyzing trace with hash 357934980, now seen corresponding path program 1 times [2022-11-22 02:23:21,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:23:21,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241893248] [2022-11-22 02:23:21,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:23:21,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:23:21,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:23:22,378 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 19 proven. 3 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-22 02:23:22,378 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:23:22,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241893248] [2022-11-22 02:23:22,379 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241893248] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:23:22,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687623621] [2022-11-22 02:23:22,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:23:22,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:23:22,379 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2224b52f-815e-45dc-afc3-1830222808db/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:23:22,381 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2224b52f-815e-45dc-afc3-1830222808db/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:23:22,400 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2224b52f-815e-45dc-afc3-1830222808db/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-22 02:23:22,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:23:22,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 1891 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-22 02:23:22,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:23:22,931 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-22 02:23:22,931 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:23:22,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1687623621] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:23:22,931 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 02:23:22,932 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 10 [2022-11-22 02:23:22,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946950361] [2022-11-22 02:23:22,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:23:22,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 02:23:22,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:23:22,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 02:23:22,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-22 02:23:22,934 INFO L87 Difference]: Start difference. First operand 4401 states and 6944 transitions. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 4 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2022-11-22 02:23:24,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:23:24,742 INFO L93 Difference]: Finished difference Result 11083 states and 17801 transitions. [2022-11-22 02:23:24,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 02:23:24,743 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), 4 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) Word has length 124 [2022-11-22 02:23:24,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:23:24,792 INFO L225 Difference]: With dead ends: 11083 [2022-11-22 02:23:24,792 INFO L226 Difference]: Without dead ends: 7279 [2022-11-22 02:23:24,821 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2022-11-22 02:23:24,821 INFO L413 NwaCegarLoop]: 851 mSDtfsCounter, 551 mSDsluCounter, 758 mSDsCounter, 0 mSdLazyCounter, 729 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 611 SdHoareTripleChecker+Valid, 1609 SdHoareTripleChecker+Invalid, 880 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 729 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:23:24,822 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [611 Valid, 1609 Invalid, 880 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 729 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-22 02:23:24,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7279 states. [2022-11-22 02:23:25,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7279 to 7261. [2022-11-22 02:23:25,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7261 states, 4887 states have (on average 1.4923265807243709) internal successors, (7293), 5268 states have internal predecessors, (7293), 1869 states have call successors, (1869), 473 states have call predecessors, (1869), 504 states have return successors, (2297), 1831 states have call predecessors, (2297), 1858 states have call successors, (2297) [2022-11-22 02:23:25,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7261 states to 7261 states and 11459 transitions. [2022-11-22 02:23:25,652 INFO L78 Accepts]: Start accepts. Automaton has 7261 states and 11459 transitions. Word has length 124 [2022-11-22 02:23:25,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:23:25,653 INFO L495 AbstractCegarLoop]: Abstraction has 7261 states and 11459 transitions. [2022-11-22 02:23:25,654 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), 4 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2022-11-22 02:23:25,654 INFO L276 IsEmpty]: Start isEmpty. Operand 7261 states and 11459 transitions. [2022-11-22 02:23:25,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-11-22 02:23:25,670 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:23:25,671 INFO L195 NwaCegarLoop]: trace histogram [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, 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] [2022-11-22 02:23:25,681 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2224b52f-815e-45dc-afc3-1830222808db/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-22 02:23:25,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2224b52f-815e-45dc-afc3-1830222808db/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-22 02:23:25,880 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:23:25,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:23:25,881 INFO L85 PathProgramCache]: Analyzing trace with hash 530631708, now seen corresponding path program 1 times [2022-11-22 02:23:25,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:23:25,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748285761] [2022-11-22 02:23:25,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:23:25,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:23:25,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:23:26,419 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 19 proven. 3 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-22 02:23:26,420 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:23:26,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748285761] [2022-11-22 02:23:26,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748285761] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:23:26,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687124652] [2022-11-22 02:23:26,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:23:26,421 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:23:26,421 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2224b52f-815e-45dc-afc3-1830222808db/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:23:26,428 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2224b52f-815e-45dc-afc3-1830222808db/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:23:26,458 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2224b52f-815e-45dc-afc3-1830222808db/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-22 02:23:26,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:23:26,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 1892 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-22 02:23:26,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:23:26,996 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-22 02:23:26,997 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:23:26,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [687124652] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:23:26,997 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 02:23:26,998 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [8] total 15 [2022-11-22 02:23:26,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761034871] [2022-11-22 02:23:26,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:23:26,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-22 02:23:26,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:23:26,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-22 02:23:27,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2022-11-22 02:23:27,000 INFO L87 Difference]: Start difference. First operand 7261 states and 11459 transitions. Second operand has 9 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 3 states have call successors, (23), 3 states have call predecessors, (23), 5 states have return successors, (21), 5 states have call predecessors, (21), 3 states have call successors, (21) [2022-11-22 02:23:29,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:23:29,115 INFO L93 Difference]: Finished difference Result 18186 states and 29039 transitions. [2022-11-22 02:23:29,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-22 02:23:29,116 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 3 states have call successors, (23), 3 states have call predecessors, (23), 5 states have return successors, (21), 5 states have call predecessors, (21), 3 states have call successors, (21) Word has length 125 [2022-11-22 02:23:29,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:23:29,202 INFO L225 Difference]: With dead ends: 18186 [2022-11-22 02:23:29,203 INFO L226 Difference]: Without dead ends: 11544 [2022-11-22 02:23:29,337 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2022-11-22 02:23:29,338 INFO L413 NwaCegarLoop]: 687 mSDtfsCounter, 656 mSDsluCounter, 3561 mSDsCounter, 0 mSdLazyCounter, 964 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 715 SdHoareTripleChecker+Valid, 4248 SdHoareTripleChecker+Invalid, 1096 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 964 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-22 02:23:29,338 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [715 Valid, 4248 Invalid, 1096 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 964 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-22 02:23:29,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11544 states. [2022-11-22 02:23:30,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11544 to 10469. [2022-11-22 02:23:30,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10469 states, 6995 states have (on average 1.4932094353109364) internal successors, (10445), 7562 states have internal predecessors, (10445), 2765 states have call successors, (2765), 667 states have call predecessors, (2765), 708 states have return successors, (3474), 2719 states have call predecessors, (3474), 2748 states have call successors, (3474) [2022-11-22 02:23:30,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10469 states to 10469 states and 16684 transitions. [2022-11-22 02:23:30,450 INFO L78 Accepts]: Start accepts. Automaton has 10469 states and 16684 transitions. Word has length 125 [2022-11-22 02:23:30,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:23:30,451 INFO L495 AbstractCegarLoop]: Abstraction has 10469 states and 16684 transitions. [2022-11-22 02:23:30,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 3 states have call successors, (23), 3 states have call predecessors, (23), 5 states have return successors, (21), 5 states have call predecessors, (21), 3 states have call successors, (21) [2022-11-22 02:23:30,451 INFO L276 IsEmpty]: Start isEmpty. Operand 10469 states and 16684 transitions. [2022-11-22 02:23:30,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-11-22 02:23:30,463 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:23:30,463 INFO L195 NwaCegarLoop]: trace histogram [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, 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] [2022-11-22 02:23:30,476 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2224b52f-815e-45dc-afc3-1830222808db/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-22 02:23:30,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2224b52f-815e-45dc-afc3-1830222808db/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-22 02:23:30,671 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:23:30,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:23:30,672 INFO L85 PathProgramCache]: Analyzing trace with hash 388142882, now seen corresponding path program 1 times [2022-11-22 02:23:30,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:23:30,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720592647] [2022-11-22 02:23:30,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:23:30,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:23:30,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:23:31,062 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 25 proven. 3 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-22 02:23:31,062 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:23:31,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720592647] [2022-11-22 02:23:31,063 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720592647] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:23:31,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42714896] [2022-11-22 02:23:31,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:23:31,063 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:23:31,064 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2224b52f-815e-45dc-afc3-1830222808db/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:23:31,065 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2224b52f-815e-45dc-afc3-1830222808db/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:23:31,090 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2224b52f-815e-45dc-afc3-1830222808db/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-22 02:23:31,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:23:31,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 1905 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-22 02:23:31,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:23:31,741 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 55 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-22 02:23:31,741 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:23:32,137 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 29 proven. 2 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-22 02:23:32,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [42714896] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:23:32,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1951422995] [2022-11-22 02:23:32,165 INFO L159 IcfgInterpreter]: Started Sifa with 79 locations of interest [2022-11-22 02:23:32,165 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:23:32,169 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:23:32,177 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:23:32,178 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:23:42,789 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 677 for LOIs [2022-11-22 02:24:31,757 INFO L197 IcfgInterpreter]: Interpreting procedure __automaton_fail with input of size 29 for LOIs [2022-11-22 02:24:31,760 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection with input of size 42 for LOIs [2022-11-22 02:24:31,990 INFO L197 IcfgInterpreter]: Interpreting procedure isTopFloor with input of size 36 for LOIs [2022-11-22 02:24:31,994 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 448 for LOIs [2022-11-22 02:24:32,152 INFO L197 IcfgInterpreter]: Interpreting procedure buttonForFloorIsPressed with input of size 51 for LOIs [2022-11-22 02:24:32,167 INFO L197 IcfgInterpreter]: Interpreting procedure initTopDown with input of size 595 for LOIs [2022-11-22 02:24:34,326 INFO L197 IcfgInterpreter]: Interpreting procedure initFloors with input of size 569 for LOIs [2022-11-22 02:24:34,552 INFO L197 IcfgInterpreter]: Interpreting procedure continueInDirection with input of size 39 for LOIs [2022-11-22 02:24:34,566 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentHeading with input of size 30 for LOIs [2022-11-22 02:24:34,569 INFO L197 IcfgInterpreter]: Interpreting procedure bobCall with input of size 569 for LOIs [2022-11-22 02:24:38,197 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 573 for LOIs [2022-11-22 02:24:38,819 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 501 for LOIs [2022-11-22 02:24:38,967 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:25:11,135 WARN L233 SmtUtils]: Spent 6.86s on a formula simplification. DAG size of input: 641 DAG size of output: 588 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:25:18,314 WARN L233 SmtUtils]: Spent 6.87s on a formula simplification. DAG size of input: 641 DAG size of output: 588 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:25:26,769 WARN L233 SmtUtils]: Spent 5.13s on a formula simplification. DAG size of input: 768 DAG size of output: 590 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:25:45,466 WARN L233 SmtUtils]: Spent 12.70s on a formula simplification. DAG size of input: 677 DAG size of output: 583 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:25:59,245 WARN L233 SmtUtils]: Spent 13.39s on a formula simplification. DAG size of input: 633 DAG size of output: 609 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:26:14,592 WARN L233 SmtUtils]: Spent 14.66s on a formula simplification. DAG size of input: 668 DAG size of output: 611 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:26:30,019 WARN L233 SmtUtils]: Spent 14.97s on a formula simplification. DAG size of input: 668 DAG size of output: 616 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:26:45,971 WARN L233 SmtUtils]: Spent 14.95s on a formula simplification. DAG size of input: 669 DAG size of output: 612 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:27:03,016 WARN L233 SmtUtils]: Spent 15.86s on a formula simplification. DAG size of input: 680 DAG size of output: 616 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:27:18,243 WARN L233 SmtUtils]: Spent 14.66s on a formula simplification. DAG size of input: 667 DAG size of output: 609 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:27:25,551 WARN L233 SmtUtils]: Spent 6.78s on a formula simplification. DAG size of input: 668 DAG size of output: 579 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:27:49,691 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '192521#(and (= ~head~0.offset 0) (= ~currentHeading~0 1) (<= ~floorButtons_0~0 2147483647) (= ~head~0.base 0) (= |#NULL.offset| 0) (= 0 (+ ~expectedDirection~0 1)) (<= 0 (+ ~floorButtons_0~0 2147483648)) (<= 0 |#StackHeapBarrier|) (= ~cleanupTimeShifts~0 12) (= ~currentFloorID~0 1) (= |#NULL.base| 0))' at error location [2022-11-22 02:27:49,691 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:27:49,691 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 02:27:49,692 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2022-11-22 02:27:49,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978083936] [2022-11-22 02:27:49,692 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 02:27:49,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-22 02:27:49,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:27:49,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-22 02:27:49,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=492, Invalid=5514, Unknown=0, NotChecked=0, Total=6006 [2022-11-22 02:27:49,696 INFO L87 Difference]: Start difference. First operand 10469 states and 16684 transitions. Second operand has 19 states, 16 states have (on average 7.875) internal successors, (126), 16 states have internal predecessors, (126), 8 states have call successors, (49), 4 states have call predecessors, (49), 10 states have return successors, (48), 11 states have call predecessors, (48), 8 states have call successors, (48) [2022-11-22 02:28:12,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:28:12,185 INFO L93 Difference]: Finished difference Result 51622 states and 88186 transitions. [2022-11-22 02:28:12,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-11-22 02:28:12,186 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 16 states have (on average 7.875) internal successors, (126), 16 states have internal predecessors, (126), 8 states have call successors, (49), 4 states have call predecessors, (49), 10 states have return successors, (48), 11 states have call predecessors, (48), 8 states have call successors, (48) Word has length 127 [2022-11-22 02:28:12,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:28:12,450 INFO L225 Difference]: With dead ends: 51622 [2022-11-22 02:28:12,450 INFO L226 Difference]: Without dead ends: 36010 [2022-11-22 02:28:12,637 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 512 GetRequests, 333 SyntacticMatches, 12 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11646 ImplicationChecksByTransitivity, 193.5s TimeCoverageRelationStatistics Valid=1590, Invalid=26802, Unknown=0, NotChecked=0, Total=28392 [2022-11-22 02:28:12,638 INFO L413 NwaCegarLoop]: 870 mSDtfsCounter, 7976 mSDsluCounter, 7242 mSDsCounter, 0 mSdLazyCounter, 20144 mSolverCounterSat, 5661 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8144 SdHoareTripleChecker+Valid, 8112 SdHoareTripleChecker+Invalid, 25805 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 5661 IncrementalHoareTripleChecker+Valid, 20144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.5s IncrementalHoareTripleChecker+Time [2022-11-22 02:28:12,638 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8144 Valid, 8112 Invalid, 25805 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [5661 Valid, 20144 Invalid, 0 Unknown, 0 Unchecked, 15.5s Time] [2022-11-22 02:28:12,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36010 states. [2022-11-22 02:28:15,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36010 to 27876. [2022-11-22 02:28:15,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27876 states, 18609 states have (on average 1.4911064538664087) internal successors, (27748), 20488 states have internal predecessors, (27748), 7585 states have call successors, (7585), 1491 states have call predecessors, (7585), 1681 states have return successors, (10918), 6897 states have call predecessors, (10918), 7557 states have call successors, (10918) [2022-11-22 02:28:15,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27876 states to 27876 states and 46251 transitions. [2022-11-22 02:28:15,952 INFO L78 Accepts]: Start accepts. Automaton has 27876 states and 46251 transitions. Word has length 127 [2022-11-22 02:28:15,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:28:15,953 INFO L495 AbstractCegarLoop]: Abstraction has 27876 states and 46251 transitions. [2022-11-22 02:28:15,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 16 states have (on average 7.875) internal successors, (126), 16 states have internal predecessors, (126), 8 states have call successors, (49), 4 states have call predecessors, (49), 10 states have return successors, (48), 11 states have call predecessors, (48), 8 states have call successors, (48) [2022-11-22 02:28:15,953 INFO L276 IsEmpty]: Start isEmpty. Operand 27876 states and 46251 transitions. [2022-11-22 02:28:15,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-11-22 02:28:15,966 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:28:15,967 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:28:15,980 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2224b52f-815e-45dc-afc3-1830222808db/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-22 02:28:16,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2224b52f-815e-45dc-afc3-1830222808db/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:28:16,175 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:28:16,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:28:16,175 INFO L85 PathProgramCache]: Analyzing trace with hash -858915501, now seen corresponding path program 1 times [2022-11-22 02:28:16,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:28:16,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49391309] [2022-11-22 02:28:16,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:28:16,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:28:16,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:28:16,641 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-11-22 02:28:16,641 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:28:16,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49391309] [2022-11-22 02:28:16,641 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49391309] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:28:16,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053123881] [2022-11-22 02:28:16,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:28:16,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:28:16,642 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2224b52f-815e-45dc-afc3-1830222808db/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:28:16,643 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2224b52f-815e-45dc-afc3-1830222808db/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:28:16,662 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2224b52f-815e-45dc-afc3-1830222808db/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-22 02:28:16,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:28:16,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 1708 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-22 02:28:17,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:28:17,080 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-22 02:28:17,081 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:28:17,081 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2053123881] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:28:17,081 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 02:28:17,081 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2022-11-22 02:28:17,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458449543] [2022-11-22 02:28:17,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:28:17,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 02:28:17,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:28:17,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 02:28:17,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-22 02:28:17,083 INFO L87 Difference]: Start difference. First operand 27876 states and 46251 transitions. Second operand has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 4 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) [2022-11-22 02:28:20,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:28:20,211 INFO L93 Difference]: Finished difference Result 56544 states and 95557 transitions. [2022-11-22 02:28:20,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 02:28:20,215 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 4 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) Word has length 136 [2022-11-22 02:28:20,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:28:20,494 INFO L225 Difference]: With dead ends: 56544 [2022-11-22 02:28:20,506 INFO L226 Difference]: Without dead ends: 26613 [2022-11-22 02:28:20,705 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-11-22 02:28:20,706 INFO L413 NwaCegarLoop]: 610 mSDtfsCounter, 177 mSDsluCounter, 944 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 1554 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-22 02:28:20,707 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [187 Valid, 1554 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-22 02:28:20,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26613 states. [2022-11-22 02:28:23,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26613 to 26591. [2022-11-22 02:28:23,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26591 states, 17541 states have (on average 1.4765406761302091) internal successors, (25900), 19402 states have internal predecessors, (25900), 7409 states have call successors, (7409), 1467 states have call predecessors, (7409), 1640 states have return successors, (10662), 6722 states have call predecessors, (10662), 7381 states have call successors, (10662) [2022-11-22 02:28:23,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26591 states to 26591 states and 43971 transitions. [2022-11-22 02:28:23,392 INFO L78 Accepts]: Start accepts. Automaton has 26591 states and 43971 transitions. Word has length 136 [2022-11-22 02:28:23,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:28:23,392 INFO L495 AbstractCegarLoop]: Abstraction has 26591 states and 43971 transitions. [2022-11-22 02:28:23,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 4 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) [2022-11-22 02:28:23,392 INFO L276 IsEmpty]: Start isEmpty. Operand 26591 states and 43971 transitions. [2022-11-22 02:28:23,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-11-22 02:28:23,408 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:28:23,408 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:28:23,416 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2224b52f-815e-45dc-afc3-1830222808db/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-22 02:28:23,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2224b52f-815e-45dc-afc3-1830222808db/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-22 02:28:23,616 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:28:23,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:28:23,616 INFO L85 PathProgramCache]: Analyzing trace with hash 1444136859, now seen corresponding path program 1 times [2022-11-22 02:28:23,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:28:23,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388656051] [2022-11-22 02:28:23,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:28:23,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:28:23,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:28:24,229 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-11-22 02:28:24,230 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:28:24,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388656051] [2022-11-22 02:28:24,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388656051] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:28:24,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604828669] [2022-11-22 02:28:24,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:28:24,231 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:28:24,231 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2224b52f-815e-45dc-afc3-1830222808db/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:28:24,235 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2224b52f-815e-45dc-afc3-1830222808db/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:28:24,242 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2224b52f-815e-45dc-afc3-1830222808db/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-22 02:28:24,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:28:24,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 1712 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-22 02:28:24,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:28:24,802 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 20 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-22 02:28:24,803 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:28:25,470 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-22 02:28:25,471 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1604828669] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:28:25,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1563869474] [2022-11-22 02:28:25,481 INFO L159 IcfgInterpreter]: Started Sifa with 119 locations of interest [2022-11-22 02:28:25,482 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:28:25,483 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:28:25,483 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:28:25,484 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:28:31,336 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 566 for LOIs [2022-11-22 02:28:38,854 INFO L197 IcfgInterpreter]: Interpreting procedure buttonForFloorIsPressed with input of size 491 for LOIs [2022-11-22 02:28:39,250 INFO L197 IcfgInterpreter]: Interpreting procedure initTopDown with input of size 595 for LOIs [2022-11-22 02:28:41,690 INFO L197 IcfgInterpreter]: Interpreting procedure initFloors with input of size 569 for LOIs [2022-11-22 02:28:42,001 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentHeading with input of size 433 for LOIs [2022-11-22 02:28:42,078 INFO L197 IcfgInterpreter]: Interpreting procedure bobCall with input of size 569 for LOIs [2022-11-22 02:28:46,410 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 573 for LOIs [2022-11-22 02:28:47,019 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 501 for LOIs [2022-11-22 02:28:47,240 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:29:18,911 WARN L233 SmtUtils]: Spent 6.92s on a formula simplification. DAG size of input: 641 DAG size of output: 588 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:29:26,036 WARN L233 SmtUtils]: Spent 6.85s on a formula simplification. DAG size of input: 641 DAG size of output: 588 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:29:34,438 WARN L233 SmtUtils]: Spent 5.12s on a formula simplification. DAG size of input: 768 DAG size of output: 590 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:29:57,121 WARN L233 SmtUtils]: Spent 5.71s on a formula simplification. DAG size of input: 618 DAG size of output: 589 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:30:03,120 WARN L233 SmtUtils]: Spent 5.63s on a formula simplification. DAG size of input: 616 DAG size of output: 589 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:30:13,396 WARN L233 SmtUtils]: Spent 9.13s on a formula simplification. DAG size of input: 491 DAG size of output: 438 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:30:23,072 WARN L233 SmtUtils]: Spent 9.26s on a formula simplification. DAG size of input: 527 DAG size of output: 446 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:30:29,470 WARN L233 SmtUtils]: Spent 5.88s on a formula simplification. DAG size of input: 622 DAG size of output: 591 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:30:35,749 WARN L233 SmtUtils]: Spent 5.78s on a formula simplification. DAG size of input: 620 DAG size of output: 591 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:30:43,366 WARN L233 SmtUtils]: Spent 5.98s on a formula simplification. DAG size of input: 625 DAG size of output: 592 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:30:49,686 WARN L233 SmtUtils]: Spent 5.85s on a formula simplification. DAG size of input: 625 DAG size of output: 592 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:30:49,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1563869474] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:30:49,696 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-22 02:30:49,696 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [7, 6, 7] total 39 [2022-11-22 02:30:49,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26429767] [2022-11-22 02:30:49,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:30:49,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-22 02:30:49,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:30:49,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-22 02:30:49,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=1321, Unknown=0, NotChecked=0, Total=1482 [2022-11-22 02:30:49,699 INFO L87 Difference]: Start difference. First operand 26591 states and 43971 transitions. Second operand has 27 states, 20 states have (on average 4.15) internal successors, (83), 15 states have internal predecessors, (83), 10 states have call successors, (24), 8 states have call predecessors, (24), 8 states have return successors, (22), 9 states have call predecessors, (22), 9 states have call successors, (22) [2022-11-22 02:30:56,557 WARN L233 SmtUtils]: Spent 5.84s on a formula simplification. DAG size of input: 606 DAG size of output: 571 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:31:02,849 WARN L233 SmtUtils]: Spent 5.97s on a formula simplification. DAG size of input: 612 DAG size of output: 577 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:31:19,748 WARN L233 SmtUtils]: Spent 10.48s on a formula simplification. DAG size of input: 589 DAG size of output: 572 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:31:30,596 WARN L233 SmtUtils]: Spent 10.61s on a formula simplification. DAG size of input: 595 DAG size of output: 578 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:32:00,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:32:00,478 INFO L93 Difference]: Finished difference Result 53276 states and 87641 transitions. [2022-11-22 02:32:00,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-22 02:32:00,479 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 20 states have (on average 4.15) internal successors, (83), 15 states have internal predecessors, (83), 10 states have call successors, (24), 8 states have call predecessors, (24), 8 states have return successors, (22), 9 states have call predecessors, (22), 9 states have call successors, (22) Word has length 140 [2022-11-22 02:32:00,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:32:00,696 INFO L225 Difference]: With dead ends: 53276 [2022-11-22 02:32:00,696 INFO L226 Difference]: Without dead ends: 26713 [2022-11-22 02:32:00,908 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 433 GetRequests, 383 SyntacticMatches, 8 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 436 ImplicationChecksByTransitivity, 161.3s TimeCoverageRelationStatistics Valid=196, Invalid=1696, Unknown=0, NotChecked=0, Total=1892 [2022-11-22 02:32:00,908 INFO L413 NwaCegarLoop]: 570 mSDtfsCounter, 173 mSDsluCounter, 3754 mSDsCounter, 0 mSdLazyCounter, 5171 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 28.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 4324 SdHoareTripleChecker+Invalid, 5220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 5171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 29.6s IncrementalHoareTripleChecker+Time [2022-11-22 02:32:00,909 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [187 Valid, 4324 Invalid, 5220 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [49 Valid, 5171 Invalid, 0 Unknown, 0 Unchecked, 29.6s Time] [2022-11-22 02:32:00,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26713 states. [2022-11-22 02:32:02,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26713 to 26634. [2022-11-22 02:32:02,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26634 states, 17574 states have (on average 1.475873449413907) internal successors, (25937), 19434 states have internal predecessors, (25937), 7415 states have call successors, (7415), 1472 states have call predecessors, (7415), 1644 states have return successors, (10668), 6728 states have call predecessors, (10668), 7387 states have call successors, (10668) [2022-11-22 02:32:03,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26634 states to 26634 states and 44020 transitions. [2022-11-22 02:32:03,218 INFO L78 Accepts]: Start accepts. Automaton has 26634 states and 44020 transitions. Word has length 140 [2022-11-22 02:32:03,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:32:03,218 INFO L495 AbstractCegarLoop]: Abstraction has 26634 states and 44020 transitions. [2022-11-22 02:32:03,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 20 states have (on average 4.15) internal successors, (83), 15 states have internal predecessors, (83), 10 states have call successors, (24), 8 states have call predecessors, (24), 8 states have return successors, (22), 9 states have call predecessors, (22), 9 states have call successors, (22) [2022-11-22 02:32:03,219 INFO L276 IsEmpty]: Start isEmpty. Operand 26634 states and 44020 transitions. [2022-11-22 02:32:03,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2022-11-22 02:32:03,232 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:32:03,233 INFO L195 NwaCegarLoop]: trace histogram [7, 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, 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] [2022-11-22 02:32:03,246 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2224b52f-815e-45dc-afc3-1830222808db/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-22 02:32:03,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2224b52f-815e-45dc-afc3-1830222808db/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-22 02:32:03,446 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:32:03,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:32:03,447 INFO L85 PathProgramCache]: Analyzing trace with hash 493869230, now seen corresponding path program 1 times [2022-11-22 02:32:03,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:32:03,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223193677] [2022-11-22 02:32:03,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:32:03,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:32:03,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:32:04,441 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 20 proven. 3 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2022-11-22 02:32:04,441 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:32:04,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223193677] [2022-11-22 02:32:04,441 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223193677] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:32:04,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742443451] [2022-11-22 02:32:04,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:32:04,442 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:32:04,442 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2224b52f-815e-45dc-afc3-1830222808db/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:32:04,443 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2224b52f-815e-45dc-afc3-1830222808db/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:32:04,449 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2224b52f-815e-45dc-afc3-1830222808db/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-22 02:32:04,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:32:04,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 1925 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-22 02:32:04,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:32:04,949 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-22 02:32:04,949 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:32:04,950 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1742443451] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:32:04,950 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 02:32:04,950 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [18] total 24 [2022-11-22 02:32:04,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614821996] [2022-11-22 02:32:04,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:32:04,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-22 02:32:04,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:32:04,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-22 02:32:04,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2022-11-22 02:32:04,952 INFO L87 Difference]: Start difference. First operand 26634 states and 44020 transitions. Second operand has 8 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 3 states have call successors, (24), 3 states have call predecessors, (24), 5 states have return successors, (23), 4 states have call predecessors, (23), 3 states have call successors, (23) [2022-11-22 02:32:08,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:32:08,809 INFO L93 Difference]: Finished difference Result 51319 states and 85476 transitions. [2022-11-22 02:32:08,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-22 02:32:08,809 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 3 states have call successors, (24), 3 states have call predecessors, (24), 5 states have return successors, (23), 4 states have call predecessors, (23), 3 states have call successors, (23) Word has length 139 [2022-11-22 02:32:08,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:32:09,022 INFO L225 Difference]: With dead ends: 51319 [2022-11-22 02:32:09,022 INFO L226 Difference]: Without dead ends: 25848 [2022-11-22 02:32:09,252 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=80, Invalid=676, Unknown=0, NotChecked=0, Total=756 [2022-11-22 02:32:09,252 INFO L413 NwaCegarLoop]: 938 mSDtfsCounter, 655 mSDsluCounter, 3172 mSDsCounter, 0 mSdLazyCounter, 1815 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 717 SdHoareTripleChecker+Valid, 4110 SdHoareTripleChecker+Invalid, 1959 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 1815 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-22 02:32:09,253 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [717 Valid, 4110 Invalid, 1959 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 1815 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-22 02:32:09,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25848 states. [2022-11-22 02:32:11,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25848 to 24852. [2022-11-22 02:32:11,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24852 states, 16415 states have (on average 1.4768199817240328) internal successors, (24242), 18114 states have internal predecessors, (24242), 6818 states have call successors, (6818), 1455 states have call predecessors, (6818), 1618 states have return successors, (9665), 6197 states have call predecessors, (9665), 6782 states have call successors, (9665) [2022-11-22 02:32:11,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24852 states to 24852 states and 40725 transitions. [2022-11-22 02:32:11,779 INFO L78 Accepts]: Start accepts. Automaton has 24852 states and 40725 transitions. Word has length 139 [2022-11-22 02:32:11,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:32:11,780 INFO L495 AbstractCegarLoop]: Abstraction has 24852 states and 40725 transitions. [2022-11-22 02:32:11,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 3 states have call successors, (24), 3 states have call predecessors, (24), 5 states have return successors, (23), 4 states have call predecessors, (23), 3 states have call successors, (23) [2022-11-22 02:32:11,780 INFO L276 IsEmpty]: Start isEmpty. Operand 24852 states and 40725 transitions. [2022-11-22 02:32:11,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-11-22 02:32:11,787 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:32:11,788 INFO L195 NwaCegarLoop]: trace histogram [7, 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, 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] [2022-11-22 02:32:11,798 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2224b52f-815e-45dc-afc3-1830222808db/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-22 02:32:11,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2224b52f-815e-45dc-afc3-1830222808db/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:32:11,996 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:32:11,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:32:11,996 INFO L85 PathProgramCache]: Analyzing trace with hash 549565040, now seen corresponding path program 1 times [2022-11-22 02:32:11,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:32:11,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399960494] [2022-11-22 02:32:11,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:32:11,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:32:12,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:32:12,972 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 24 proven. 3 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-11-22 02:32:12,972 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:32:12,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399960494] [2022-11-22 02:32:12,972 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399960494] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:32:12,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559109088] [2022-11-22 02:32:12,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:32:12,973 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:32:12,973 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2224b52f-815e-45dc-afc3-1830222808db/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:32:12,974 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2224b52f-815e-45dc-afc3-1830222808db/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:32:12,995 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2224b52f-815e-45dc-afc3-1830222808db/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-22 02:32:13,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:32:13,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 1939 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-22 02:32:13,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:32:13,392 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-22 02:32:13,392 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:32:13,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1559109088] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:32:13,392 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 02:32:13,392 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [18] total 19 [2022-11-22 02:32:13,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309058717] [2022-11-22 02:32:13,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:32:13,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 02:32:13,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:32:13,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 02:32:13,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2022-11-22 02:32:13,394 INFO L87 Difference]: Start difference. First operand 24852 states and 40725 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2022-11-22 02:32:15,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:32:15,560 INFO L93 Difference]: Finished difference Result 45177 states and 75769 transitions. [2022-11-22 02:32:15,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 02:32:15,560 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) Word has length 142 [2022-11-22 02:32:15,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:32:15,712 INFO L225 Difference]: With dead ends: 45177 [2022-11-22 02:32:15,712 INFO L226 Difference]: Without dead ends: 21470 [2022-11-22 02:32:16,160 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2022-11-22 02:32:16,161 INFO L413 NwaCegarLoop]: 720 mSDtfsCounter, 100 mSDsluCounter, 564 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 1284 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:32:16,161 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [158 Valid, 1284 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 02:32:16,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21470 states. [2022-11-22 02:32:17,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21470 to 21311. [2022-11-22 02:32:17,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21311 states, 14171 states have (on average 1.4632700585703198) internal successors, (20736), 15530 states have internal predecessors, (20736), 5707 states have call successors, (5707), 1289 states have call predecessors, (5707), 1432 states have return successors, (8234), 5242 states have call predecessors, (8234), 5671 states have call successors, (8234) [2022-11-22 02:32:17,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21311 states to 21311 states and 34677 transitions. [2022-11-22 02:32:17,864 INFO L78 Accepts]: Start accepts. Automaton has 21311 states and 34677 transitions. Word has length 142 [2022-11-22 02:32:17,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:32:17,865 INFO L495 AbstractCegarLoop]: Abstraction has 21311 states and 34677 transitions. [2022-11-22 02:32:17,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2022-11-22 02:32:17,865 INFO L276 IsEmpty]: Start isEmpty. Operand 21311 states and 34677 transitions. [2022-11-22 02:32:17,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-11-22 02:32:17,872 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:32:17,872 INFO L195 NwaCegarLoop]: trace histogram [7, 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, 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] [2022-11-22 02:32:17,879 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2224b52f-815e-45dc-afc3-1830222808db/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-22 02:32:18,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2224b52f-815e-45dc-afc3-1830222808db/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:32:18,073 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:32:18,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:32:18,073 INFO L85 PathProgramCache]: Analyzing trace with hash 1563552564, now seen corresponding path program 1 times [2022-11-22 02:32:18,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:32:18,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534236668] [2022-11-22 02:32:18,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:32:18,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:32:18,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:32:19,125 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 20 proven. 3 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-11-22 02:32:19,125 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:32:19,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534236668] [2022-11-22 02:32:19,126 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534236668] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:32:19,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [683319106] [2022-11-22 02:32:19,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:32:19,126 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:32:19,126 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2224b52f-815e-45dc-afc3-1830222808db/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:32:19,132 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2224b52f-815e-45dc-afc3-1830222808db/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:32:19,135 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2224b52f-815e-45dc-afc3-1830222808db/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-22 02:32:19,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:32:19,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 1940 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-22 02:32:19,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:32:19,620 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-22 02:32:19,620 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:32:19,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [683319106] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:32:19,620 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 02:32:19,620 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [18] total 24 [2022-11-22 02:32:19,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152527416] [2022-11-22 02:32:19,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:32:19,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-22 02:32:19,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:32:19,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-22 02:32:19,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=491, Unknown=0, NotChecked=0, Total=552 [2022-11-22 02:32:19,622 INFO L87 Difference]: Start difference. First operand 21311 states and 34677 transitions. Second operand has 8 states, 7 states have (on average 12.142857142857142) internal successors, (85), 7 states have internal predecessors, (85), 3 states have call successors, (25), 3 states have call predecessors, (25), 5 states have return successors, (24), 4 states have call predecessors, (24), 3 states have call successors, (24) [2022-11-22 02:32:22,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:32:22,902 INFO L93 Difference]: Finished difference Result 41441 states and 67385 transitions. [2022-11-22 02:32:22,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-22 02:32:22,903 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 12.142857142857142) internal successors, (85), 7 states have internal predecessors, (85), 3 states have call successors, (25), 3 states have call predecessors, (25), 5 states have return successors, (24), 4 states have call predecessors, (24), 3 states have call successors, (24) Word has length 142 [2022-11-22 02:32:22,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:32:23,025 INFO L225 Difference]: With dead ends: 41441 [2022-11-22 02:32:23,025 INFO L226 Difference]: Without dead ends: 21379 [2022-11-22 02:32:23,137 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=77, Invalid=679, Unknown=0, NotChecked=0, Total=756 [2022-11-22 02:32:23,138 INFO L413 NwaCegarLoop]: 942 mSDtfsCounter, 551 mSDsluCounter, 3951 mSDsCounter, 0 mSdLazyCounter, 1753 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 607 SdHoareTripleChecker+Valid, 4893 SdHoareTripleChecker+Invalid, 1879 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 1753 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:32:23,138 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [607 Valid, 4893 Invalid, 1879 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 1753 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-22 02:32:23,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21379 states. [2022-11-22 02:32:24,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21379 to 21355. [2022-11-22 02:32:24,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21355 states, 14215 states have (on average 1.4618360886387618) internal successors, (20780), 15552 states have internal predecessors, (20780), 5707 states have call successors, (5707), 1311 states have call predecessors, (5707), 1432 states have return successors, (8182), 5242 states have call predecessors, (8182), 5671 states have call successors, (8182) [2022-11-22 02:32:25,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21355 states to 21355 states and 34669 transitions. [2022-11-22 02:32:25,239 INFO L78 Accepts]: Start accepts. Automaton has 21355 states and 34669 transitions. Word has length 142 [2022-11-22 02:32:25,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:32:25,239 INFO L495 AbstractCegarLoop]: Abstraction has 21355 states and 34669 transitions. [2022-11-22 02:32:25,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 12.142857142857142) internal successors, (85), 7 states have internal predecessors, (85), 3 states have call successors, (25), 3 states have call predecessors, (25), 5 states have return successors, (24), 4 states have call predecessors, (24), 3 states have call successors, (24) [2022-11-22 02:32:25,240 INFO L276 IsEmpty]: Start isEmpty. Operand 21355 states and 34669 transitions. [2022-11-22 02:32:25,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-11-22 02:32:25,252 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:32:25,252 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:32:25,258 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2224b52f-815e-45dc-afc3-1830222808db/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-11-22 02:32:25,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2224b52f-815e-45dc-afc3-1830222808db/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-11-22 02:32:25,453 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:32:25,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:32:25,453 INFO L85 PathProgramCache]: Analyzing trace with hash -251274282, now seen corresponding path program 1 times [2022-11-22 02:32:25,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:32:25,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317692547] [2022-11-22 02:32:25,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:32:25,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:32:25,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:32:25,685 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-22 02:32:25,686 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:32:25,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317692547] [2022-11-22 02:32:25,686 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317692547] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:32:25,686 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:32:25,687 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-22 02:32:25,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729761263] [2022-11-22 02:32:25,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:32:25,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 02:32:25,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:32:25,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 02:32:25,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-22 02:32:25,689 INFO L87 Difference]: Start difference. First operand 21355 states and 34669 transitions. Second operand has 5 states, 5 states have (on average 17.4) internal successors, (87), 4 states have internal predecessors, (87), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 3 states have call predecessors, (23), 2 states have call successors, (23) [2022-11-22 02:32:27,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:32:27,973 INFO L93 Difference]: Finished difference Result 41924 states and 69541 transitions. [2022-11-22 02:32:27,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 02:32:27,976 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.4) internal successors, (87), 4 states have internal predecessors, (87), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 3 states have call predecessors, (23), 2 states have call successors, (23) Word has length 146 [2022-11-22 02:32:27,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:32:28,108 INFO L225 Difference]: With dead ends: 41924 [2022-11-22 02:32:28,108 INFO L226 Difference]: Without dead ends: 21660 [2022-11-22 02:32:28,238 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-22 02:32:28,238 INFO L413 NwaCegarLoop]: 559 mSDtfsCounter, 13 mSDsluCounter, 1640 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 2199 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:32:28,239 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 2199 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 02:32:28,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21660 states.