./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec3_product28.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7a91e64-e3e5-4f9f-9659-6dc42aba8feb/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7a91e64-e3e5-4f9f-9659-6dc42aba8feb/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7a91e64-e3e5-4f9f-9659-6dc42aba8feb/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7a91e64-e3e5-4f9f-9659-6dc42aba8feb/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec3_product28.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7a91e64-e3e5-4f9f-9659-6dc42aba8feb/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7a91e64-e3e5-4f9f-9659-6dc42aba8feb/bin/utaipan-gh47qXpMRh --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash cb2818f0d8bce3a3c55c338823c603b0097898f29d2ecfaf46bb61225da928d8 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-14 06:18:32,040 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 06:18:32,042 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 06:18:32,061 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 06:18:32,062 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 06:18:32,063 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 06:18:32,064 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 06:18:32,066 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 06:18:32,067 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 06:18:32,068 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 06:18:32,069 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 06:18:32,070 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 06:18:32,071 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 06:18:32,072 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 06:18:32,073 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 06:18:32,074 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 06:18:32,075 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 06:18:32,076 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 06:18:32,077 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 06:18:32,079 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 06:18:32,081 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 06:18:32,082 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 06:18:32,083 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 06:18:32,084 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 06:18:32,088 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 06:18:32,088 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 06:18:32,088 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 06:18:32,089 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 06:18:32,090 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 06:18:32,091 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 06:18:32,091 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 06:18:32,092 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 06:18:32,092 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 06:18:32,093 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 06:18:32,094 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 06:18:32,094 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 06:18:32,095 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 06:18:32,095 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 06:18:32,095 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 06:18:32,096 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 06:18:32,097 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 06:18:32,098 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7a91e64-e3e5-4f9f-9659-6dc42aba8feb/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 06:18:32,119 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 06:18:32,120 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 06:18:32,120 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 06:18:32,120 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 06:18:32,121 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 06:18:32,121 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 06:18:32,121 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 06:18:32,121 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 06:18:32,122 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 06:18:32,122 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 06:18:32,122 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 06:18:32,122 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 06:18:32,122 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 06:18:32,123 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 06:18:32,123 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 06:18:32,123 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 06:18:32,123 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 06:18:32,123 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 06:18:32,124 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 06:18:32,124 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 06:18:32,125 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 06:18:32,125 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 06:18:32,125 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 06:18:32,125 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 06:18:32,125 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 06:18:32,126 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 06:18:32,126 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 06:18:32,126 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 06:18:32,126 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 06:18:32,126 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 06:18:32,127 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 06:18:32,127 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 06:18:32,127 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 06:18:32,127 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 06:18:32,127 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 06:18:32,128 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 06:18:32,128 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 06:18:32,128 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 06:18:32,128 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 06:18:32,128 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 06:18:32,128 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 06:18:32,129 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_c7a91e64-e3e5-4f9f-9659-6dc42aba8feb/bin/utaipan-gh47qXpMRh/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7a91e64-e3e5-4f9f-9659-6dc42aba8feb/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cb2818f0d8bce3a3c55c338823c603b0097898f29d2ecfaf46bb61225da928d8 [2022-12-14 06:18:32,328 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 06:18:32,346 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 06:18:32,348 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 06:18:32,349 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 06:18:32,349 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 06:18:32,350 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7a91e64-e3e5-4f9f-9659-6dc42aba8feb/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/product-lines/elevator_spec3_product28.cil.c [2022-12-14 06:18:35,022 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 06:18:35,253 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 06:18:35,253 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7a91e64-e3e5-4f9f-9659-6dc42aba8feb/sv-benchmarks/c/product-lines/elevator_spec3_product28.cil.c [2022-12-14 06:18:35,265 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7a91e64-e3e5-4f9f-9659-6dc42aba8feb/bin/utaipan-gh47qXpMRh/data/04a643506/3f911bd927bb4eed858b2b0b0425eff7/FLAG2b8bb5702 [2022-12-14 06:18:35,276 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7a91e64-e3e5-4f9f-9659-6dc42aba8feb/bin/utaipan-gh47qXpMRh/data/04a643506/3f911bd927bb4eed858b2b0b0425eff7 [2022-12-14 06:18:35,277 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 06:18:35,278 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 06:18:35,279 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 06:18:35,279 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 06:18:35,282 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 06:18:35,283 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 06:18:35" (1/1) ... [2022-12-14 06:18:35,283 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@17283a9a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:18:35, skipping insertion in model container [2022-12-14 06:18:35,283 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 06:18:35" (1/1) ... [2022-12-14 06:18:35,289 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 06:18:35,344 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 06:18:35,729 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_c7a91e64-e3e5-4f9f-9659-6dc42aba8feb/sv-benchmarks/c/product-lines/elevator_spec3_product28.cil.c[73221,73234] [2022-12-14 06:18:35,735 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 06:18:35,746 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 06:18:35,857 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_c7a91e64-e3e5-4f9f-9659-6dc42aba8feb/sv-benchmarks/c/product-lines/elevator_spec3_product28.cil.c[73221,73234] [2022-12-14 06:18:35,858 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 06:18:35,884 INFO L208 MainTranslator]: Completed translation [2022-12-14 06:18:35,884 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:18:35 WrapperNode [2022-12-14 06:18:35,884 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 06:18:35,885 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 06:18:35,885 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 06:18:35,885 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 06:18:35,893 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:18:35" (1/1) ... [2022-12-14 06:18:35,916 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:18:35" (1/1) ... [2022-12-14 06:18:35,958 INFO L138 Inliner]: procedures = 95, calls = 354, calls flagged for inlining = 27, calls inlined = 23, statements flattened = 1156 [2022-12-14 06:18:35,959 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 06:18:35,959 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 06:18:35,959 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 06:18:35,960 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 06:18:35,969 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:18:35" (1/1) ... [2022-12-14 06:18:35,969 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:18:35" (1/1) ... [2022-12-14 06:18:35,976 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:18:35" (1/1) ... [2022-12-14 06:18:35,976 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:18:35" (1/1) ... [2022-12-14 06:18:35,994 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:18:35" (1/1) ... [2022-12-14 06:18:36,006 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:18:35" (1/1) ... [2022-12-14 06:18:36,011 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:18:35" (1/1) ... [2022-12-14 06:18:36,015 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:18:35" (1/1) ... [2022-12-14 06:18:36,023 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 06:18:36,024 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 06:18:36,024 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 06:18:36,024 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 06:18:36,025 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:18:35" (1/1) ... [2022-12-14 06:18:36,031 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 06:18:36,041 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7a91e64-e3e5-4f9f-9659-6dc42aba8feb/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:18:36,052 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7a91e64-e3e5-4f9f-9659-6dc42aba8feb/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 06:18:36,054 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7a91e64-e3e5-4f9f-9659-6dc42aba8feb/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 06:18:36,083 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 06:18:36,083 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2022-12-14 06:18:36,084 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2022-12-14 06:18:36,084 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2022-12-14 06:18:36,084 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2022-12-14 06:18:36,084 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2022-12-14 06:18:36,084 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2022-12-14 06:18:36,084 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2022-12-14 06:18:36,084 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2022-12-14 06:18:36,085 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2022-12-14 06:18:36,085 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2022-12-14 06:18:36,085 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2022-12-14 06:18:36,085 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2022-12-14 06:18:36,085 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2022-12-14 06:18:36,085 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2022-12-14 06:18:36,085 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2022-12-14 06:18:36,085 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2022-12-14 06:18:36,085 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2022-12-14 06:18:36,086 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2022-12-14 06:18:36,086 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2022-12-14 06:18:36,086 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2022-12-14 06:18:36,086 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2022-12-14 06:18:36,086 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2022-12-14 06:18:36,086 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2022-12-14 06:18:36,086 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2022-12-14 06:18:36,086 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2022-12-14 06:18:36,087 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2022-12-14 06:18:36,087 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2022-12-14 06:18:36,087 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2022-12-14 06:18:36,087 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2022-12-14 06:18:36,087 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2022-12-14 06:18:36,087 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2022-12-14 06:18:36,087 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2022-12-14 06:18:36,087 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__empty [2022-12-14 06:18:36,088 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__empty [2022-12-14 06:18:36,088 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2022-12-14 06:18:36,088 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2022-12-14 06:18:36,088 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2022-12-14 06:18:36,088 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2022-12-14 06:18:36,088 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2022-12-14 06:18:36,088 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2022-12-14 06:18:36,088 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2022-12-14 06:18:36,089 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2022-12-14 06:18:36,089 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2022-12-14 06:18:36,089 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2022-12-14 06:18:36,089 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 06:18:36,089 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2022-12-14 06:18:36,089 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2022-12-14 06:18:36,089 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2022-12-14 06:18:36,089 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2022-12-14 06:18:36,090 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2022-12-14 06:18:36,090 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2022-12-14 06:18:36,090 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2022-12-14 06:18:36,090 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2022-12-14 06:18:36,090 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 06:18:36,090 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 06:18:36,090 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2022-12-14 06:18:36,090 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2022-12-14 06:18:36,091 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__executivefloor [2022-12-14 06:18:36,091 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__executivefloor [2022-12-14 06:18:36,209 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 06:18:36,211 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 06:18:36,967 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 06:18:37,430 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 06:18:37,431 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-12-14 06:18:37,433 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 06:18:37 BoogieIcfgContainer [2022-12-14 06:18:37,433 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 06:18:37,435 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 06:18:37,435 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 06:18:37,437 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 06:18:37,437 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 06:18:35" (1/3) ... [2022-12-14 06:18:37,438 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45502ac5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 06:18:37, skipping insertion in model container [2022-12-14 06:18:37,438 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:18:35" (2/3) ... [2022-12-14 06:18:37,438 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45502ac5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 06:18:37, skipping insertion in model container [2022-12-14 06:18:37,438 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 06:18:37" (3/3) ... [2022-12-14 06:18:37,439 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec3_product28.cil.c [2022-12-14 06:18:37,454 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 06:18:37,454 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 06:18:37,495 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 06:18:37,500 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;@5e8d8bf6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 06:18:37,500 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 06:18:37,505 INFO L276 IsEmpty]: Start isEmpty. Operand has 417 states, 277 states have (on average 1.5667870036101084) internal successors, (434), 297 states have internal predecessors, (434), 110 states have call successors, (110), 28 states have call predecessors, (110), 28 states have return successors, (110), 106 states have call predecessors, (110), 110 states have call successors, (110) [2022-12-14 06:18:37,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-12-14 06:18:37,512 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:18:37,512 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] [2022-12-14 06:18:37,513 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:18:37,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:18:37,517 INFO L85 PathProgramCache]: Analyzing trace with hash -1777110212, now seen corresponding path program 1 times [2022-12-14 06:18:37,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:18:37,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993572823] [2022-12-14 06:18:37,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:18:37,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:18:37,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:18:37,920 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 06:18:37,921 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:18:37,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993572823] [2022-12-14 06:18:37,921 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993572823] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:18:37,922 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:18:37,922 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 06:18:37,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529709855] [2022-12-14 06:18:37,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:18:37,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:18:37,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:18:37,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:18:37,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 06:18:37,951 INFO L87 Difference]: Start difference. First operand has 417 states, 277 states have (on average 1.5667870036101084) internal successors, (434), 297 states have internal predecessors, (434), 110 states have call successors, (110), 28 states have call predecessors, (110), 28 states have return successors, (110), 106 states have call predecessors, (110), 110 states have call successors, (110) Second operand has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 3 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 06:18:38,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:18:38,305 INFO L93 Difference]: Finished difference Result 1223 states and 1951 transitions. [2022-12-14 06:18:38,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:18:38,308 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 3 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 50 [2022-12-14 06:18:38,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:18:38,329 INFO L225 Difference]: With dead ends: 1223 [2022-12-14 06:18:38,329 INFO L226 Difference]: Without dead ends: 808 [2022-12-14 06:18:38,339 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 06:18:38,342 INFO L413 NwaCegarLoop]: 759 mSDtfsCounter, 617 mSDsluCounter, 596 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 617 SdHoareTripleChecker+Valid, 1355 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 06:18:38,343 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [617 Valid, 1355 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 06:18:38,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 808 states. [2022-12-14 06:18:38,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 808 to 770. [2022-12-14 06:18:38,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 770 states, 529 states have (on average 1.5689981096408319) internal successors, (830), 556 states have internal predecessors, (830), 194 states have call successors, (194), 49 states have call predecessors, (194), 46 states have return successors, (197), 179 states have call predecessors, (197), 190 states have call successors, (197) [2022-12-14 06:18:38,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 770 states to 770 states and 1221 transitions. [2022-12-14 06:18:38,478 INFO L78 Accepts]: Start accepts. Automaton has 770 states and 1221 transitions. Word has length 50 [2022-12-14 06:18:38,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:18:38,479 INFO L495 AbstractCegarLoop]: Abstraction has 770 states and 1221 transitions. [2022-12-14 06:18:38,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 3 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 06:18:38,480 INFO L276 IsEmpty]: Start isEmpty. Operand 770 states and 1221 transitions. [2022-12-14 06:18:38,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-12-14 06:18:38,487 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:18:38,487 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:18:38,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 06:18:38,488 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:18:38,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:18:38,488 INFO L85 PathProgramCache]: Analyzing trace with hash 356687764, now seen corresponding path program 1 times [2022-12-14 06:18:38,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:18:38,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653667674] [2022-12-14 06:18:38,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:18:38,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:18:38,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:18:38,846 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-12-14 06:18:38,846 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:18:38,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653667674] [2022-12-14 06:18:38,846 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653667674] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:18:38,846 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:18:38,846 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 06:18:38,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255750554] [2022-12-14 06:18:38,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:18:38,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 06:18:38,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:18:38,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 06:18:38,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 06:18:38,849 INFO L87 Difference]: Start difference. First operand 770 states and 1221 transitions. Second operand has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 3 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2022-12-14 06:18:39,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:18:39,068 INFO L93 Difference]: Finished difference Result 1861 states and 2938 transitions. [2022-12-14 06:18:39,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 06:18:39,069 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 3 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) Word has length 93 [2022-12-14 06:18:39,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:18:39,077 INFO L225 Difference]: With dead ends: 1861 [2022-12-14 06:18:39,077 INFO L226 Difference]: Without dead ends: 1103 [2022-12-14 06:18:39,090 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 06:18:39,092 INFO L413 NwaCegarLoop]: 703 mSDtfsCounter, 459 mSDsluCounter, 1076 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 461 SdHoareTripleChecker+Valid, 1779 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:18:39,092 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [461 Valid, 1779 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:18:39,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1103 states. [2022-12-14 06:18:39,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1103 to 1087. [2022-12-14 06:18:39,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1087 states, 739 states have (on average 1.5223274695534506) internal successors, (1125), 767 states have internal predecessors, (1125), 273 states have call successors, (273), 75 states have call predecessors, (273), 74 states have return successors, (301), 258 states have call predecessors, (301), 267 states have call successors, (301) [2022-12-14 06:18:39,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1087 states to 1087 states and 1699 transitions. [2022-12-14 06:18:39,187 INFO L78 Accepts]: Start accepts. Automaton has 1087 states and 1699 transitions. Word has length 93 [2022-12-14 06:18:39,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:18:39,188 INFO L495 AbstractCegarLoop]: Abstraction has 1087 states and 1699 transitions. [2022-12-14 06:18:39,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 3 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2022-12-14 06:18:39,188 INFO L276 IsEmpty]: Start isEmpty. Operand 1087 states and 1699 transitions. [2022-12-14 06:18:39,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-12-14 06:18:39,191 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:18:39,191 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:18:39,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 06:18:39,191 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:18:39,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:18:39,192 INFO L85 PathProgramCache]: Analyzing trace with hash -1287969113, now seen corresponding path program 1 times [2022-12-14 06:18:39,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:18:39,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711932714] [2022-12-14 06:18:39,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:18:39,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:18:39,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:18:39,477 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-12-14 06:18:39,477 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:18:39,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711932714] [2022-12-14 06:18:39,477 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711932714] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:18:39,478 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:18:39,478 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 06:18:39,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280181166] [2022-12-14 06:18:39,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:18:39,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 06:18:39,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:18:39,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 06:18:39,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 06:18:39,480 INFO L87 Difference]: Start difference. First operand 1087 states and 1699 transitions. Second operand has 6 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 3 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (17), 4 states have call predecessors, (17), 3 states have call successors, (17) [2022-12-14 06:18:40,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:18:40,222 INFO L93 Difference]: Finished difference Result 2939 states and 4785 transitions. [2022-12-14 06:18:40,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 06:18:40,223 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 3 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (17), 4 states have call predecessors, (17), 3 states have call successors, (17) Word has length 94 [2022-12-14 06:18:40,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:18:40,231 INFO L225 Difference]: With dead ends: 2939 [2022-12-14 06:18:40,231 INFO L226 Difference]: Without dead ends: 1864 [2022-12-14 06:18:40,236 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-12-14 06:18:40,236 INFO L413 NwaCegarLoop]: 775 mSDtfsCounter, 675 mSDsluCounter, 2676 mSDsCounter, 0 mSdLazyCounter, 566 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 694 SdHoareTripleChecker+Valid, 3451 SdHoareTripleChecker+Invalid, 607 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 566 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 06:18:40,237 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [694 Valid, 3451 Invalid, 607 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 566 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 06:18:40,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1864 states. [2022-12-14 06:18:40,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1864 to 1588. [2022-12-14 06:18:40,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1588 states, 1082 states have (on average 1.5138632162661738) internal successors, (1638), 1127 states have internal predecessors, (1638), 395 states have call successors, (395), 111 states have call predecessors, (395), 110 states have return successors, (465), 371 states have call predecessors, (465), 387 states have call successors, (465) [2022-12-14 06:18:40,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1588 states to 1588 states and 2498 transitions. [2022-12-14 06:18:40,301 INFO L78 Accepts]: Start accepts. Automaton has 1588 states and 2498 transitions. Word has length 94 [2022-12-14 06:18:40,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:18:40,301 INFO L495 AbstractCegarLoop]: Abstraction has 1588 states and 2498 transitions. [2022-12-14 06:18:40,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 3 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (17), 4 states have call predecessors, (17), 3 states have call successors, (17) [2022-12-14 06:18:40,301 INFO L276 IsEmpty]: Start isEmpty. Operand 1588 states and 2498 transitions. [2022-12-14 06:18:40,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-12-14 06:18:40,303 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:18:40,303 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:18:40,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-14 06:18:40,303 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:18:40,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:18:40,304 INFO L85 PathProgramCache]: Analyzing trace with hash -594792328, now seen corresponding path program 1 times [2022-12-14 06:18:40,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:18:40,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314090730] [2022-12-14 06:18:40,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:18:40,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:18:40,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:18:40,504 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 06:18:40,504 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:18:40,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314090730] [2022-12-14 06:18:40,505 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314090730] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:18:40,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632246559] [2022-12-14 06:18:40,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:18:40,505 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:18:40,505 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7a91e64-e3e5-4f9f-9659-6dc42aba8feb/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:18:40,506 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7a91e64-e3e5-4f9f-9659-6dc42aba8feb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:18:40,507 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7a91e64-e3e5-4f9f-9659-6dc42aba8feb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 06:18:40,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:18:40,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 1809 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 06:18:40,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:18:40,860 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 06:18:40,860 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 06:18:40,860 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [632246559] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:18:40,860 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 06:18:40,861 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-12-14 06:18:40,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349473171] [2022-12-14 06:18:40,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:18:40,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:18:40,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:18:40,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:18:40,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-14 06:18:40,863 INFO L87 Difference]: Start difference. First operand 1588 states and 2498 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-12-14 06:18:41,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:18:41,121 INFO L93 Difference]: Finished difference Result 4408 states and 7202 transitions. [2022-12-14 06:18:41,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:18:41,122 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 93 [2022-12-14 06:18:41,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:18:41,136 INFO L225 Difference]: With dead ends: 4408 [2022-12-14 06:18:41,136 INFO L226 Difference]: Without dead ends: 2832 [2022-12-14 06:18:41,145 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-14 06:18:41,145 INFO L413 NwaCegarLoop]: 1079 mSDtfsCounter, 571 mSDsluCounter, 515 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 571 SdHoareTripleChecker+Valid, 1594 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:18:41,146 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [571 Valid, 1594 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:18:41,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2832 states. [2022-12-14 06:18:41,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2832 to 2714. [2022-12-14 06:18:41,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2714 states, 1865 states have (on average 1.5179624664879356) internal successors, (2831), 1957 states have internal predecessors, (2831), 645 states have call successors, (645), 192 states have call predecessors, (645), 203 states have return successors, (816), 608 states have call predecessors, (816), 637 states have call successors, (816) [2022-12-14 06:18:41,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2714 states to 2714 states and 4292 transitions. [2022-12-14 06:18:41,285 INFO L78 Accepts]: Start accepts. Automaton has 2714 states and 4292 transitions. Word has length 93 [2022-12-14 06:18:41,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:18:41,285 INFO L495 AbstractCegarLoop]: Abstraction has 2714 states and 4292 transitions. [2022-12-14 06:18:41,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-12-14 06:18:41,285 INFO L276 IsEmpty]: Start isEmpty. Operand 2714 states and 4292 transitions. [2022-12-14 06:18:41,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-12-14 06:18:41,287 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:18:41,288 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:18:41,296 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7a91e64-e3e5-4f9f-9659-6dc42aba8feb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 06:18:41,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7a91e64-e3e5-4f9f-9659-6dc42aba8feb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:18:41,488 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:18:41,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:18:41,489 INFO L85 PathProgramCache]: Analyzing trace with hash 1448319920, now seen corresponding path program 1 times [2022-12-14 06:18:41,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:18:41,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783285458] [2022-12-14 06:18:41,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:18:41,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:18:41,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:18:41,701 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 06:18:41,701 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:18:41,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783285458] [2022-12-14 06:18:41,701 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [783285458] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:18:41,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1302936392] [2022-12-14 06:18:41,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:18:41,702 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:18:41,702 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7a91e64-e3e5-4f9f-9659-6dc42aba8feb/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:18:41,703 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7a91e64-e3e5-4f9f-9659-6dc42aba8feb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:18:41,704 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7a91e64-e3e5-4f9f-9659-6dc42aba8feb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 06:18:41,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:18:41,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 1822 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 06:18:41,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:18:42,004 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 06:18:42,004 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 06:18:42,004 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1302936392] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:18:42,004 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 06:18:42,004 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-12-14 06:18:42,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448608295] [2022-12-14 06:18:42,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:18:42,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:18:42,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:18:42,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:18:42,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-14 06:18:42,006 INFO L87 Difference]: Start difference. First operand 2714 states and 4292 transitions. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-12-14 06:18:42,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:18:42,208 INFO L93 Difference]: Finished difference Result 5636 states and 9156 transitions. [2022-12-14 06:18:42,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:18:42,208 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 95 [2022-12-14 06:18:42,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:18:42,229 INFO L225 Difference]: With dead ends: 5636 [2022-12-14 06:18:42,229 INFO L226 Difference]: Without dead ends: 2934 [2022-12-14 06:18:42,239 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-14 06:18:42,240 INFO L413 NwaCegarLoop]: 627 mSDtfsCounter, 33 mSDsluCounter, 582 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 1209 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:18:42,240 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 1209 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:18:42,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2934 states. [2022-12-14 06:18:42,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2934 to 2798. [2022-12-14 06:18:42,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2798 states, 1937 states have (on average 1.5049044914816727) internal successors, (2915), 2029 states have internal predecessors, (2915), 657 states have call successors, (657), 192 states have call predecessors, (657), 203 states have return successors, (828), 620 states have call predecessors, (828), 649 states have call successors, (828) [2022-12-14 06:18:42,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2798 states to 2798 states and 4400 transitions. [2022-12-14 06:18:42,344 INFO L78 Accepts]: Start accepts. Automaton has 2798 states and 4400 transitions. Word has length 95 [2022-12-14 06:18:42,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:18:42,344 INFO L495 AbstractCegarLoop]: Abstraction has 2798 states and 4400 transitions. [2022-12-14 06:18:42,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-12-14 06:18:42,344 INFO L276 IsEmpty]: Start isEmpty. Operand 2798 states and 4400 transitions. [2022-12-14 06:18:42,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-12-14 06:18:42,346 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:18:42,346 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:18:42,353 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7a91e64-e3e5-4f9f-9659-6dc42aba8feb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 06:18:42,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7a91e64-e3e5-4f9f-9659-6dc42aba8feb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:18:42,547 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:18:42,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:18:42,548 INFO L85 PathProgramCache]: Analyzing trace with hash 525689070, now seen corresponding path program 1 times [2022-12-14 06:18:42,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:18:42,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101086079] [2022-12-14 06:18:42,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:18:42,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:18:42,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:18:42,769 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 06:18:42,769 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:18:42,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101086079] [2022-12-14 06:18:42,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101086079] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:18:42,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397536910] [2022-12-14 06:18:42,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:18:42,770 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:18:42,770 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7a91e64-e3e5-4f9f-9659-6dc42aba8feb/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:18:42,771 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7a91e64-e3e5-4f9f-9659-6dc42aba8feb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:18:42,771 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7a91e64-e3e5-4f9f-9659-6dc42aba8feb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 06:18:43,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:18:43,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 1810 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 06:18:43,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:18:43,124 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 06:18:43,124 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 06:18:43,124 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [397536910] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:18:43,124 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 06:18:43,124 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-12-14 06:18:43,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106442138] [2022-12-14 06:18:43,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:18:43,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:18:43,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:18:43,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:18:43,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-14 06:18:43,126 INFO L87 Difference]: Start difference. First operand 2798 states and 4400 transitions. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 3 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-12-14 06:18:43,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:18:43,414 INFO L93 Difference]: Finished difference Result 6828 states and 11064 transitions. [2022-12-14 06:18:43,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:18:43,414 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 3 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 94 [2022-12-14 06:18:43,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:18:43,432 INFO L225 Difference]: With dead ends: 6828 [2022-12-14 06:18:43,432 INFO L226 Difference]: Without dead ends: 4042 [2022-12-14 06:18:43,445 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-14 06:18:43,446 INFO L413 NwaCegarLoop]: 1082 mSDtfsCounter, 571 mSDsluCounter, 515 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 571 SdHoareTripleChecker+Valid, 1597 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:18:43,446 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [571 Valid, 1597 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:18:43,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4042 states. [2022-12-14 06:18:43,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4042 to 3912. [2022-12-14 06:18:43,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3912 states, 2714 states have (on average 1.5025792188651437) internal successors, (4078), 2853 states have internal predecessors, (4078), 904 states have call successors, (904), 270 states have call predecessors, (904), 293 states have return successors, (1176), 854 states have call predecessors, (1176), 896 states have call successors, (1176) [2022-12-14 06:18:43,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3912 states to 3912 states and 6158 transitions. [2022-12-14 06:18:43,615 INFO L78 Accepts]: Start accepts. Automaton has 3912 states and 6158 transitions. Word has length 94 [2022-12-14 06:18:43,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:18:43,616 INFO L495 AbstractCegarLoop]: Abstraction has 3912 states and 6158 transitions. [2022-12-14 06:18:43,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 3 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-12-14 06:18:43,616 INFO L276 IsEmpty]: Start isEmpty. Operand 3912 states and 6158 transitions. [2022-12-14 06:18:43,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-12-14 06:18:43,621 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:18:43,621 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:18:43,627 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7a91e64-e3e5-4f9f-9659-6dc42aba8feb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 06:18:43,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7a91e64-e3e5-4f9f-9659-6dc42aba8feb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-12-14 06:18:43,822 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:18:43,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:18:43,822 INFO L85 PathProgramCache]: Analyzing trace with hash -1233616205, now seen corresponding path program 1 times [2022-12-14 06:18:43,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:18:43,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754011000] [2022-12-14 06:18:43,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:18:43,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:18:43,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:18:43,997 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-12-14 06:18:43,998 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:18:43,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754011000] [2022-12-14 06:18:43,998 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754011000] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:18:43,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63557347] [2022-12-14 06:18:43,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:18:43,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:18:43,998 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7a91e64-e3e5-4f9f-9659-6dc42aba8feb/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:18:43,999 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7a91e64-e3e5-4f9f-9659-6dc42aba8feb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:18:44,000 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7a91e64-e3e5-4f9f-9659-6dc42aba8feb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 06:18:44,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:18:44,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 1823 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 06:18:44,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:18:44,338 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 06:18:44,338 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 06:18:44,338 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [63557347] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:18:44,338 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 06:18:44,338 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2022-12-14 06:18:44,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642792023] [2022-12-14 06:18:44,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:18:44,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 06:18:44,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:18:44,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 06:18:44,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2022-12-14 06:18:44,351 INFO L87 Difference]: Start difference. First operand 3912 states and 6158 transitions. Second operand has 6 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 4 states have call successors, (19), 3 states have call predecessors, (19), 4 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) [2022-12-14 06:18:45,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:18:45,189 INFO L93 Difference]: Finished difference Result 10051 states and 16209 transitions. [2022-12-14 06:18:45,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 06:18:45,190 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 4 states have call successors, (19), 3 states have call predecessors, (19), 4 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) Word has length 95 [2022-12-14 06:18:45,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:18:45,219 INFO L225 Difference]: With dead ends: 10051 [2022-12-14 06:18:45,219 INFO L226 Difference]: Without dead ends: 6151 [2022-12-14 06:18:45,242 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-12-14 06:18:45,242 INFO L413 NwaCegarLoop]: 712 mSDtfsCounter, 527 mSDsluCounter, 2191 mSDsCounter, 0 mSdLazyCounter, 649 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 535 SdHoareTripleChecker+Valid, 2903 SdHoareTripleChecker+Invalid, 703 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 649 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 06:18:45,242 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [535 Valid, 2903 Invalid, 703 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 649 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 06:18:45,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6151 states. [2022-12-14 06:18:45,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6151 to 5967. [2022-12-14 06:18:45,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5967 states, 4138 states have (on average 1.4693088448525857) internal successors, (6080), 4367 states have internal predecessors, (6080), 1376 states have call successors, (1376), 432 states have call predecessors, (1376), 452 states have return successors, (1763), 1273 states have call predecessors, (1763), 1365 states have call successors, (1763) [2022-12-14 06:18:45,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5967 states to 5967 states and 9219 transitions. [2022-12-14 06:18:45,477 INFO L78 Accepts]: Start accepts. Automaton has 5967 states and 9219 transitions. Word has length 95 [2022-12-14 06:18:45,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:18:45,478 INFO L495 AbstractCegarLoop]: Abstraction has 5967 states and 9219 transitions. [2022-12-14 06:18:45,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 4 states have call successors, (19), 3 states have call predecessors, (19), 4 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) [2022-12-14 06:18:45,478 INFO L276 IsEmpty]: Start isEmpty. Operand 5967 states and 9219 transitions. [2022-12-14 06:18:45,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-12-14 06:18:45,480 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:18:45,480 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:18:45,488 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7a91e64-e3e5-4f9f-9659-6dc42aba8feb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 06:18:45,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7a91e64-e3e5-4f9f-9659-6dc42aba8feb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-12-14 06:18:45,682 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:18:45,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:18:45,683 INFO L85 PathProgramCache]: Analyzing trace with hash 1303726333, now seen corresponding path program 1 times [2022-12-14 06:18:45,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:18:45,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237035962] [2022-12-14 06:18:45,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:18:45,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:18:45,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:18:46,094 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-12-14 06:18:46,094 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:18:46,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237035962] [2022-12-14 06:18:46,094 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237035962] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:18:46,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901950382] [2022-12-14 06:18:46,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:18:46,095 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:18:46,095 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7a91e64-e3e5-4f9f-9659-6dc42aba8feb/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:18:46,095 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7a91e64-e3e5-4f9f-9659-6dc42aba8feb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:18:46,096 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7a91e64-e3e5-4f9f-9659-6dc42aba8feb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 06:18:46,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:18:46,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 1837 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-14 06:18:46,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:18:46,623 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-14 06:18:46,624 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:18:46,848 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-12-14 06:18:46,848 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [901950382] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:18:46,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1625894766] [2022-12-14 06:18:46,868 INFO L159 IcfgInterpreter]: Started Sifa with 87 locations of interest [2022-12-14 06:18:46,868 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 06:18:46,872 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 06:18:46,877 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 06:18:46,878 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 06:18:50,984 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 582 for LOIs [2022-12-14 06:18:57,606 INFO L197 IcfgInterpreter]: Interpreting procedure buttonForFloorIsPressed with input of size 511 for LOIs [2022-12-14 06:18:57,962 INFO L197 IcfgInterpreter]: Interpreting procedure initTopDown with input of size 607 for LOIs [2022-12-14 06:19:00,020 INFO L197 IcfgInterpreter]: Interpreting procedure initFloors with input of size 581 for LOIs [2022-12-14 06:19:00,220 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 445 for LOIs [2022-12-14 06:19:00,296 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentHeading with input of size 445 for LOIs [2022-12-14 06:19:00,370 INFO L197 IcfgInterpreter]: Interpreting procedure bobCall with input of size 581 for LOIs [2022-12-14 06:19:03,824 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 585 for LOIs [2022-12-14 06:19:04,404 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 513 for LOIs [2022-12-14 06:19:04,548 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 06:20:05,908 WARN L233 SmtUtils]: Spent 5.55s on a formula simplification. DAG size of input: 511 DAG size of output: 450 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 06:20:12,669 WARN L233 SmtUtils]: Spent 6.35s on a formula simplification. DAG size of input: 547 DAG size of output: 458 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 06:20:30,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1625894766] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:20:30,359 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-12-14 06:20:30,360 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [10, 8, 10] total 51 [2022-12-14 06:20:30,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515531982] [2022-12-14 06:20:30,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:20:30,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-12-14 06:20:30,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:20:30,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-12-14 06:20:30,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=2172, Unknown=0, NotChecked=0, Total=2550 [2022-12-14 06:20:30,363 INFO L87 Difference]: Start difference. First operand 5967 states and 9219 transitions. Second operand has 29 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 17 states have internal predecessors, (53), 11 states have call successors, (20), 8 states have call predecessors, (20), 9 states have return successors, (18), 10 states have call predecessors, (18), 10 states have call successors, (18) [2022-12-14 06:20:52,315 WARN L233 SmtUtils]: Spent 6.56s on a formula simplification. DAG size of input: 607 DAG size of output: 588 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 06:20:59,714 WARN L233 SmtUtils]: Spent 7.14s on a formula simplification. DAG size of input: 613 DAG size of output: 594 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 06:21:27,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:21:27,087 INFO L93 Difference]: Finished difference Result 12067 states and 18648 transitions. [2022-12-14 06:21:27,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-12-14 06:21:27,088 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 17 states have internal predecessors, (53), 11 states have call successors, (20), 8 states have call predecessors, (20), 9 states have return successors, (18), 10 states have call predecessors, (18), 10 states have call successors, (18) Word has length 100 [2022-12-14 06:21:27,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:21:27,109 INFO L225 Difference]: With dead ends: 12067 [2022-12-14 06:21:27,109 INFO L226 Difference]: Without dead ends: 6112 [2022-12-14 06:21:27,126 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 253 SyntacticMatches, 7 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 890 ImplicationChecksByTransitivity, 113.5s TimeCoverageRelationStatistics Valid=460, Invalid=2732, Unknown=0, NotChecked=0, Total=3192 [2022-12-14 06:21:27,127 INFO L413 NwaCegarLoop]: 599 mSDtfsCounter, 283 mSDsluCounter, 3065 mSDsCounter, 0 mSdLazyCounter, 6624 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 27.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 298 SdHoareTripleChecker+Valid, 3664 SdHoareTripleChecker+Invalid, 6705 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 6624 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 28.7s IncrementalHoareTripleChecker+Time [2022-12-14 06:21:27,127 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [298 Valid, 3664 Invalid, 6705 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [81 Valid, 6624 Invalid, 0 Unknown, 0 Unchecked, 28.7s Time] [2022-12-14 06:21:27,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6112 states. [2022-12-14 06:21:27,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6112 to 6033. [2022-12-14 06:21:27,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6033 states, 4184 states have (on average 1.465583173996176) internal successors, (6132), 4412 states have internal predecessors, (6132), 1389 states have call successors, (1389), 441 states have call predecessors, (1389), 459 states have return successors, (1777), 1285 states have call predecessors, (1777), 1378 states have call successors, (1777) [2022-12-14 06:21:27,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6033 states to 6033 states and 9298 transitions. [2022-12-14 06:21:27,564 INFO L78 Accepts]: Start accepts. Automaton has 6033 states and 9298 transitions. Word has length 100 [2022-12-14 06:21:27,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:21:27,564 INFO L495 AbstractCegarLoop]: Abstraction has 6033 states and 9298 transitions. [2022-12-14 06:21:27,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 17 states have internal predecessors, (53), 11 states have call successors, (20), 8 states have call predecessors, (20), 9 states have return successors, (18), 10 states have call predecessors, (18), 10 states have call successors, (18) [2022-12-14 06:21:27,565 INFO L276 IsEmpty]: Start isEmpty. Operand 6033 states and 9298 transitions. [2022-12-14 06:21:27,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-12-14 06:21:27,566 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:21:27,566 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:21:27,573 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7a91e64-e3e5-4f9f-9659-6dc42aba8feb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 06:21:27,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7a91e64-e3e5-4f9f-9659-6dc42aba8feb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:21:27,767 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:21:27,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:21:27,767 INFO L85 PathProgramCache]: Analyzing trace with hash 1924565449, now seen corresponding path program 1 times [2022-12-14 06:21:27,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:21:27,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804018733] [2022-12-14 06:21:27,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:21:27,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:21:27,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:21:28,055 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-14 06:21:28,055 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:21:28,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804018733] [2022-12-14 06:21:28,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804018733] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:21:28,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198186808] [2022-12-14 06:21:28,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:21:28,056 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:21:28,056 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7a91e64-e3e5-4f9f-9659-6dc42aba8feb/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:21:28,057 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7a91e64-e3e5-4f9f-9659-6dc42aba8feb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:21:28,057 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7a91e64-e3e5-4f9f-9659-6dc42aba8feb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 06:21:28,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:21:28,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 1853 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-14 06:21:28,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:21:28,519 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-12-14 06:21:28,519 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:21:28,723 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-14 06:21:28,723 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1198186808] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:21:28,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [310200476] [2022-12-14 06:21:28,725 INFO L159 IcfgInterpreter]: Started Sifa with 91 locations of interest [2022-12-14 06:21:28,725 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 06:21:28,725 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 06:21:28,725 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 06:21:28,725 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 06:21:32,557 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 582 for LOIs [2022-12-14 06:21:43,284 INFO L197 IcfgInterpreter]: Interpreting procedure buttonForFloorIsPressed with input of size 64 for LOIs [2022-12-14 06:21:43,295 INFO L197 IcfgInterpreter]: Interpreting procedure initTopDown with input of size 607 for LOIs [2022-12-14 06:21:45,393 INFO L197 IcfgInterpreter]: Interpreting procedure initFloors with input of size 581 for LOIs [2022-12-14 06:21:45,591 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 445 for LOIs [2022-12-14 06:21:45,666 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentHeading with input of size 445 for LOIs [2022-12-14 06:21:45,749 INFO L197 IcfgInterpreter]: Interpreting procedure bobCall with input of size 581 for LOIs [2022-12-14 06:21:49,211 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 585 for LOIs [2022-12-14 06:21:49,864 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 513 for LOIs [2022-12-14 06:21:50,047 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 06:23:10,691 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [310200476] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:23:10,691 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-12-14 06:23:10,691 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [10, 8, 10] total 50 [2022-12-14 06:23:10,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202605543] [2022-12-14 06:23:10,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:23:10,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-12-14 06:23:10,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:23:10,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-12-14 06:23:10,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=2067, Unknown=0, NotChecked=0, Total=2450 [2022-12-14 06:23:10,694 INFO L87 Difference]: Start difference. First operand 6033 states and 9298 transitions. Second operand has 31 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 18 states have internal predecessors, (56), 12 states have call successors, (21), 8 states have call predecessors, (21), 9 states have return successors, (19), 11 states have call predecessors, (19), 11 states have call successors, (19) [2022-12-14 06:24:10,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:24:10,312 INFO L93 Difference]: Finished difference Result 12045 states and 18609 transitions. [2022-12-14 06:24:10,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-12-14 06:24:10,314 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 18 states have internal predecessors, (56), 12 states have call successors, (21), 8 states have call predecessors, (21), 9 states have return successors, (19), 11 states have call predecessors, (19), 11 states have call successors, (19) Word has length 106 [2022-12-14 06:24:10,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:24:10,332 INFO L225 Difference]: With dead ends: 12045 [2022-12-14 06:24:10,332 INFO L226 Difference]: Without dead ends: 6102 [2022-12-14 06:24:10,346 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 268 SyntacticMatches, 11 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1005 ImplicationChecksByTransitivity, 102.4s TimeCoverageRelationStatistics Valid=462, Invalid=2618, Unknown=0, NotChecked=0, Total=3080 [2022-12-14 06:24:10,346 INFO L413 NwaCegarLoop]: 596 mSDtfsCounter, 265 mSDsluCounter, 4200 mSDsCounter, 0 mSdLazyCounter, 8759 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 35.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 279 SdHoareTripleChecker+Valid, 4796 SdHoareTripleChecker+Invalid, 8829 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 8759 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 37.4s IncrementalHoareTripleChecker+Time [2022-12-14 06:24:10,346 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [279 Valid, 4796 Invalid, 8829 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [70 Valid, 8759 Invalid, 0 Unknown, 0 Unchecked, 37.4s Time] [2022-12-14 06:24:10,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6102 states. [2022-12-14 06:24:10,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6102 to 6035. [2022-12-14 06:24:10,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6035 states, 4185 states have (on average 1.4652329749103943) internal successors, (6132), 4413 states have internal predecessors, (6132), 1389 states have call successors, (1389), 442 states have call predecessors, (1389), 460 states have return successors, (1777), 1285 states have call predecessors, (1777), 1378 states have call successors, (1777) [2022-12-14 06:24:10,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6035 states to 6035 states and 9298 transitions. [2022-12-14 06:24:10,674 INFO L78 Accepts]: Start accepts. Automaton has 6035 states and 9298 transitions. Word has length 106 [2022-12-14 06:24:10,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:24:10,674 INFO L495 AbstractCegarLoop]: Abstraction has 6035 states and 9298 transitions. [2022-12-14 06:24:10,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 18 states have internal predecessors, (56), 12 states have call successors, (21), 8 states have call predecessors, (21), 9 states have return successors, (19), 11 states have call predecessors, (19), 11 states have call successors, (19) [2022-12-14 06:24:10,674 INFO L276 IsEmpty]: Start isEmpty. Operand 6035 states and 9298 transitions. [2022-12-14 06:24:10,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-12-14 06:24:10,676 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:24:10,676 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:24:10,683 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7a91e64-e3e5-4f9f-9659-6dc42aba8feb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-14 06:24:10,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7a91e64-e3e5-4f9f-9659-6dc42aba8feb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:24:10,877 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:24:10,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:24:10,877 INFO L85 PathProgramCache]: Analyzing trace with hash 1041217675, now seen corresponding path program 1 times [2022-12-14 06:24:10,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:24:10,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854519963] [2022-12-14 06:24:10,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:24:10,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:24:10,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:24:11,069 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-14 06:24:11,069 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:24:11,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854519963] [2022-12-14 06:24:11,070 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854519963] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:24:11,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950722693] [2022-12-14 06:24:11,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:24:11,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:24:11,070 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7a91e64-e3e5-4f9f-9659-6dc42aba8feb/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:24:11,071 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7a91e64-e3e5-4f9f-9659-6dc42aba8feb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:24:11,072 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7a91e64-e3e5-4f9f-9659-6dc42aba8feb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 06:24:11,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:24:11,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 1869 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-14 06:24:11,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:24:11,539 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-12-14 06:24:11,539 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:24:11,723 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-14 06:24:11,723 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [950722693] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:24:11,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1549075784] [2022-12-14 06:24:11,725 INFO L159 IcfgInterpreter]: Started Sifa with 95 locations of interest [2022-12-14 06:24:11,725 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 06:24:11,726 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 06:24:11,726 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 06:24:11,726 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 06:24:15,364 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 582 for LOIs [2022-12-14 06:24:26,246 INFO L197 IcfgInterpreter]: Interpreting procedure buttonForFloorIsPressed with input of size 510 for LOIs [2022-12-14 06:24:26,462 INFO L197 IcfgInterpreter]: Interpreting procedure initTopDown with input of size 607 for LOIs [2022-12-14 06:24:28,515 INFO L197 IcfgInterpreter]: Interpreting procedure initFloors with input of size 581 for LOIs [2022-12-14 06:24:28,712 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 445 for LOIs [2022-12-14 06:24:28,795 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentHeading with input of size 445 for LOIs [2022-12-14 06:24:28,869 INFO L197 IcfgInterpreter]: Interpreting procedure bobCall with input of size 581 for LOIs [2022-12-14 06:24:32,249 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 585 for LOIs [2022-12-14 06:24:32,816 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 513 for LOIs [2022-12-14 06:24:32,959 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 06:26:07,217 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1549075784] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:26:07,218 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-12-14 06:26:07,218 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [10, 8, 10] total 52 [2022-12-14 06:26:07,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197668545] [2022-12-14 06:26:07,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:26:07,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-12-14 06:26:07,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:26:07,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-12-14 06:26:07,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=417, Invalid=2235, Unknown=0, NotChecked=0, Total=2652 [2022-12-14 06:26:07,219 INFO L87 Difference]: Start difference. First operand 6035 states and 9298 transitions. Second operand has 33 states, 25 states have (on average 2.36) internal successors, (59), 19 states have internal predecessors, (59), 13 states have call successors, (22), 8 states have call predecessors, (22), 9 states have return successors, (20), 12 states have call predecessors, (20), 12 states have call successors, (20) [2022-12-14 06:26:27,359 WARN L233 SmtUtils]: Spent 5.23s on a formula simplification. DAG size of input: 609 DAG size of output: 589 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 06:26:32,588 WARN L233 SmtUtils]: Spent 5.02s on a formula simplification. DAG size of input: 615 DAG size of output: 595 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 06:26:55,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:26:55,597 INFO L93 Difference]: Finished difference Result 12046 states and 18598 transitions. [2022-12-14 06:26:55,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-12-14 06:26:55,598 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 25 states have (on average 2.36) internal successors, (59), 19 states have internal predecessors, (59), 13 states have call successors, (22), 8 states have call predecessors, (22), 9 states have return successors, (20), 12 states have call predecessors, (20), 12 states have call successors, (20) Word has length 112 [2022-12-14 06:26:55,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:26:55,620 INFO L225 Difference]: With dead ends: 12046 [2022-12-14 06:26:55,620 INFO L226 Difference]: Without dead ends: 6103 [2022-12-14 06:26:55,632 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 351 GetRequests, 282 SyntacticMatches, 13 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1109 ImplicationChecksByTransitivity, 117.9s TimeCoverageRelationStatistics Valid=496, Invalid=2810, Unknown=0, NotChecked=0, Total=3306 [2022-12-14 06:26:55,632 INFO L413 NwaCegarLoop]: 482 mSDtfsCounter, 268 mSDsluCounter, 3601 mSDsCounter, 0 mSdLazyCounter, 6162 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 281 SdHoareTripleChecker+Valid, 4083 SdHoareTripleChecker+Invalid, 6233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 6162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 24.3s IncrementalHoareTripleChecker+Time [2022-12-14 06:26:55,633 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [281 Valid, 4083 Invalid, 6233 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [71 Valid, 6162 Invalid, 0 Unknown, 0 Unchecked, 24.3s Time] [2022-12-14 06:26:55,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6103 states. [2022-12-14 06:26:55,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6103 to 6036. [2022-12-14 06:26:55,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6036 states, 4186 states have (on average 1.4648829431438126) internal successors, (6132), 4414 states have internal predecessors, (6132), 1388 states have call successors, (1388), 443 states have call predecessors, (1388), 461 states have return successors, (1767), 1284 states have call predecessors, (1767), 1377 states have call successors, (1767) [2022-12-14 06:26:55,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6036 states to 6036 states and 9287 transitions. [2022-12-14 06:26:55,975 INFO L78 Accepts]: Start accepts. Automaton has 6036 states and 9287 transitions. Word has length 112 [2022-12-14 06:26:55,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:26:55,975 INFO L495 AbstractCegarLoop]: Abstraction has 6036 states and 9287 transitions. [2022-12-14 06:26:55,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 25 states have (on average 2.36) internal successors, (59), 19 states have internal predecessors, (59), 13 states have call successors, (22), 8 states have call predecessors, (22), 9 states have return successors, (20), 12 states have call predecessors, (20), 12 states have call successors, (20) [2022-12-14 06:26:55,975 INFO L276 IsEmpty]: Start isEmpty. Operand 6036 states and 9287 transitions. [2022-12-14 06:26:55,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-12-14 06:26:55,980 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:26:55,980 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-12-14 06:26:55,986 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7a91e64-e3e5-4f9f-9659-6dc42aba8feb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-14 06:26:56,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7a91e64-e3e5-4f9f-9659-6dc42aba8feb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:26:56,181 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:26:56,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:26:56,181 INFO L85 PathProgramCache]: Analyzing trace with hash -1016911943, now seen corresponding path program 1 times [2022-12-14 06:26:56,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:26:56,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004392171] [2022-12-14 06:26:56,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:26:56,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:26:56,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:26:56,426 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 12 proven. 19 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2022-12-14 06:26:56,426 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:26:56,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004392171] [2022-12-14 06:26:56,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004392171] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:26:56,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689059168] [2022-12-14 06:26:56,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:26:56,427 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:26:56,427 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7a91e64-e3e5-4f9f-9659-6dc42aba8feb/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:26:56,428 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7a91e64-e3e5-4f9f-9659-6dc42aba8feb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:26:56,429 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7a91e64-e3e5-4f9f-9659-6dc42aba8feb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 06:26:56,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:26:56,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 2487 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-14 06:26:56,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:26:56,879 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2022-12-14 06:26:56,879 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 06:26:56,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1689059168] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:26:56,880 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 06:26:56,880 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [10] total 18 [2022-12-14 06:26:56,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820458944] [2022-12-14 06:26:56,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:26:56,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-14 06:26:56,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:26:56,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-14 06:26:56,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2022-12-14 06:26:56,882 INFO L87 Difference]: Start difference. First operand 6036 states and 9287 transitions. Second operand has 10 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 4 states have call successors, (29), 4 states have call predecessors, (29), 6 states have return successors, (28), 6 states have call predecessors, (28), 4 states have call successors, (28) [2022-12-14 06:26:59,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:26:59,835 INFO L93 Difference]: Finished difference Result 15297 states and 24257 transitions. [2022-12-14 06:26:59,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-12-14 06:26:59,836 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 4 states have call successors, (29), 4 states have call predecessors, (29), 6 states have return successors, (28), 6 states have call predecessors, (28), 4 states have call successors, (28) Word has length 182 [2022-12-14 06:26:59,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:26:59,867 INFO L225 Difference]: With dead ends: 15297 [2022-12-14 06:26:59,867 INFO L226 Difference]: Without dead ends: 9360 [2022-12-14 06:26:59,890 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=135, Invalid=1125, Unknown=0, NotChecked=0, Total=1260 [2022-12-14 06:26:59,890 INFO L413 NwaCegarLoop]: 583 mSDtfsCounter, 1626 mSDsluCounter, 2654 mSDsCounter, 0 mSdLazyCounter, 6539 mSolverCounterSat, 787 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1645 SdHoareTripleChecker+Valid, 3237 SdHoareTripleChecker+Invalid, 7326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 787 IncrementalHoareTripleChecker+Valid, 6539 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:26:59,890 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1645 Valid, 3237 Invalid, 7326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [787 Valid, 6539 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-12-14 06:26:59,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9360 states. [2022-12-14 06:27:00,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9360 to 8349. [2022-12-14 06:27:00,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8349 states, 5766 states have (on average 1.450398890045092) internal successors, (8363), 6040 states have internal predecessors, (8363), 1904 states have call successors, (1904), 679 states have call predecessors, (1904), 678 states have return successors, (2512), 1769 states have call predecessors, (2512), 1885 states have call successors, (2512) [2022-12-14 06:27:00,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8349 states to 8349 states and 12779 transitions. [2022-12-14 06:27:00,421 INFO L78 Accepts]: Start accepts. Automaton has 8349 states and 12779 transitions. Word has length 182 [2022-12-14 06:27:00,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:27:00,422 INFO L495 AbstractCegarLoop]: Abstraction has 8349 states and 12779 transitions. [2022-12-14 06:27:00,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 4 states have call successors, (29), 4 states have call predecessors, (29), 6 states have return successors, (28), 6 states have call predecessors, (28), 4 states have call successors, (28) [2022-12-14 06:27:00,422 INFO L276 IsEmpty]: Start isEmpty. Operand 8349 states and 12779 transitions. [2022-12-14 06:27:00,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2022-12-14 06:27:00,426 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:27:00,427 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-12-14 06:27:00,433 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7a91e64-e3e5-4f9f-9659-6dc42aba8feb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-14 06:27:00,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7a91e64-e3e5-4f9f-9659-6dc42aba8feb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:27:00,627 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:27:00,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:27:00,628 INFO L85 PathProgramCache]: Analyzing trace with hash 679057906, now seen corresponding path program 1 times [2022-12-14 06:27:00,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:27:00,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067630161] [2022-12-14 06:27:00,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:27:00,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:27:00,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:27:00,871 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 12 proven. 19 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2022-12-14 06:27:00,871 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:27:00,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067630161] [2022-12-14 06:27:00,872 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067630161] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:27:00,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456284319] [2022-12-14 06:27:00,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:27:00,872 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:27:00,872 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7a91e64-e3e5-4f9f-9659-6dc42aba8feb/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:27:00,873 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7a91e64-e3e5-4f9f-9659-6dc42aba8feb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:27:00,874 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7a91e64-e3e5-4f9f-9659-6dc42aba8feb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-14 06:27:01,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:27:01,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 2504 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-14 06:27:01,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:27:01,345 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 93 proven. 1 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-12-14 06:27:01,346 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:27:01,691 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 12 proven. 19 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2022-12-14 06:27:01,691 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [456284319] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:27:01,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1778046228] [2022-12-14 06:27:01,694 INFO L159 IcfgInterpreter]: Started Sifa with 109 locations of interest [2022-12-14 06:27:01,695 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 06:27:01,695 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 06:27:01,695 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 06:27:01,695 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 06:27:07,772 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 683 for LOIs [2022-12-14 06:27:14,502 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift__wrappee__executivefloor with input of size 82 for LOIs [2022-12-14 06:27:15,260 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection with input of size 79 for LOIs [2022-12-14 06:27:15,525 INFO L197 IcfgInterpreter]: Interpreting procedure isExecutiveFloorCalling with input of size 41 for LOIs [2022-12-14 06:27:15,550 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 43 for LOIs [2022-12-14 06:27:15,559 INFO L197 IcfgInterpreter]: Interpreting procedure __automaton_fail with input of size 28 for LOIs [2022-12-14 06:27:15,560 INFO L197 IcfgInterpreter]: Interpreting procedure buttonForFloorIsPressed with input of size 36 for LOIs [2022-12-14 06:27:15,569 INFO L197 IcfgInterpreter]: Interpreting procedure initTopDown with input of size 607 for LOIs [2022-12-14 06:27:17,674 INFO L197 IcfgInterpreter]: Interpreting procedure initFloors with input of size 581 for LOIs [2022-12-14 06:27:17,874 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 27 for LOIs [2022-12-14 06:27:17,876 INFO L197 IcfgInterpreter]: Interpreting procedure continueInDirection with input of size 71 for LOIs [2022-12-14 06:27:18,014 INFO L197 IcfgInterpreter]: Interpreting procedure isTopFloor with input of size 65 for LOIs [2022-12-14 06:27:18,020 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentHeading with input of size 53 for LOIs [2022-12-14 06:27:18,029 INFO L197 IcfgInterpreter]: Interpreting procedure bobCall with input of size 581 for LOIs [2022-12-14 06:27:21,459 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 585 for LOIs [2022-12-14 06:27:22,047 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 513 for LOIs [2022-12-14 06:27:22,191 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 06:28:24,291 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '188833#(and (= ~executiveFloor~0 4) (= ~currentHeading~0 0) (= ~head~0.offset 0) (= ~expectedDirection~0 1) (= ~head~0.base 0) (= |#NULL.offset| 0) (= ~blocked~0 0) (<= 0 |#StackHeapBarrier|) (= ~maximumWeight~0 100) (= ~cleanupTimeShifts~0 12) (= |#NULL.base| 0))' at error location [2022-12-14 06:28:24,291 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 06:28:24,292 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 06:28:24,292 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 10] total 21 [2022-12-14 06:28:24,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617597056] [2022-12-14 06:28:24,292 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 06:28:24,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-14 06:28:24,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:28:24,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-14 06:28:24,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=823, Invalid=11387, Unknown=0, NotChecked=0, Total=12210 [2022-12-14 06:28:24,295 INFO L87 Difference]: Start difference. First operand 8349 states and 12779 transitions. Second operand has 21 states, 18 states have (on average 11.11111111111111) internal successors, (200), 18 states have internal predecessors, (200), 12 states have call successors, (76), 7 states have call predecessors, (76), 11 states have return successors, (74), 15 states have call predecessors, (74), 12 states have call successors, (74) [2022-12-14 06:28:30,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:28:30,457 INFO L93 Difference]: Finished difference Result 31123 states and 51443 transitions. [2022-12-14 06:28:30,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-14 06:28:30,457 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 18 states have (on average 11.11111111111111) internal successors, (200), 18 states have internal predecessors, (200), 12 states have call successors, (76), 7 states have call predecessors, (76), 11 states have return successors, (74), 15 states have call predecessors, (74), 12 states have call successors, (74) Word has length 186 [2022-12-14 06:28:30,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:28:30,548 INFO L225 Difference]: With dead ends: 31123 [2022-12-14 06:28:30,548 INFO L226 Difference]: Without dead ends: 22862 [2022-12-14 06:28:30,596 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 591 GetRequests, 454 SyntacticMatches, 11 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6576 ImplicationChecksByTransitivity, 62.6s TimeCoverageRelationStatistics Valid=1052, Invalid=15204, Unknown=0, NotChecked=0, Total=16256 [2022-12-14 06:28:30,596 INFO L413 NwaCegarLoop]: 704 mSDtfsCounter, 3731 mSDsluCounter, 4163 mSDsCounter, 0 mSdLazyCounter, 11569 mSolverCounterSat, 2326 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3839 SdHoareTripleChecker+Valid, 4867 SdHoareTripleChecker+Invalid, 13895 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2326 IncrementalHoareTripleChecker+Valid, 11569 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2022-12-14 06:28:30,596 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3839 Valid, 4867 Invalid, 13895 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2326 Valid, 11569 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2022-12-14 06:28:30,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22862 states. [2022-12-14 06:28:31,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22862 to 19562. [2022-12-14 06:28:31,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19562 states, 13306 states have (on average 1.4456636104013227) internal successors, (19236), 14157 states have internal predecessors, (19236), 4764 states have call successors, (4764), 1453 states have call predecessors, (4764), 1491 states have return successors, (6688), 4395 states have call predecessors, (6688), 4739 states have call successors, (6688) [2022-12-14 06:28:31,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19562 states to 19562 states and 30688 transitions. [2022-12-14 06:28:31,825 INFO L78 Accepts]: Start accepts. Automaton has 19562 states and 30688 transitions. Word has length 186 [2022-12-14 06:28:31,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:28:31,825 INFO L495 AbstractCegarLoop]: Abstraction has 19562 states and 30688 transitions. [2022-12-14 06:28:31,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 18 states have (on average 11.11111111111111) internal successors, (200), 18 states have internal predecessors, (200), 12 states have call successors, (76), 7 states have call predecessors, (76), 11 states have return successors, (74), 15 states have call predecessors, (74), 12 states have call successors, (74) [2022-12-14 06:28:31,825 INFO L276 IsEmpty]: Start isEmpty. Operand 19562 states and 30688 transitions. [2022-12-14 06:28:31,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2022-12-14 06:28:31,834 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:28:31,835 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:28:31,841 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7a91e64-e3e5-4f9f-9659-6dc42aba8feb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-12-14 06:28:32,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7a91e64-e3e5-4f9f-9659-6dc42aba8feb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-12-14 06:28:32,037 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:28:32,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:28:32,038 INFO L85 PathProgramCache]: Analyzing trace with hash -520993879, now seen corresponding path program 1 times [2022-12-14 06:28:32,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:28:32,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918742547] [2022-12-14 06:28:32,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:28:32,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:28:32,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:28:32,368 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 13 proven. 10 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2022-12-14 06:28:32,368 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:28:32,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918742547] [2022-12-14 06:28:32,369 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918742547] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:28:32,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674211887] [2022-12-14 06:28:32,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:28:32,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:28:32,369 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7a91e64-e3e5-4f9f-9659-6dc42aba8feb/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:28:32,370 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7a91e64-e3e5-4f9f-9659-6dc42aba8feb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:28:32,371 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7a91e64-e3e5-4f9f-9659-6dc42aba8feb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-14 06:28:32,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:28:32,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 2518 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-14 06:28:32,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:28:32,671 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2022-12-14 06:28:32,671 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 06:28:32,672 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [674211887] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:28:32,672 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 06:28:32,672 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [13] total 17 [2022-12-14 06:28:32,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432007870] [2022-12-14 06:28:32,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:28:32,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 06:28:32,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:28:32,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 06:28:32,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=237, Unknown=0, NotChecked=0, Total=272 [2022-12-14 06:28:32,674 INFO L87 Difference]: Start difference. First operand 19562 states and 30688 transitions. Second operand has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 5 states have internal predecessors, (92), 2 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (30), 3 states have call predecessors, (30), 2 states have call successors, (30) [2022-12-14 06:28:34,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:28:34,420 INFO L93 Difference]: Finished difference Result 40479 states and 64626 transitions. [2022-12-14 06:28:34,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 06:28:34,421 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 5 states have internal predecessors, (92), 2 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (30), 3 states have call predecessors, (30), 2 states have call successors, (30) Word has length 192 [2022-12-14 06:28:34,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:28:34,511 INFO L225 Difference]: With dead ends: 40479 [2022-12-14 06:28:34,512 INFO L226 Difference]: Without dead ends: 22951 [2022-12-14 06:28:34,575 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2022-12-14 06:28:34,576 INFO L413 NwaCegarLoop]: 705 mSDtfsCounter, 117 mSDsluCounter, 2651 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 3356 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 06:28:34,576 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 3356 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 211 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 06:28:34,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22951 states. [2022-12-14 06:28:35,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22951 to 19816. [2022-12-14 06:28:35,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19816 states, 13502 states have (on average 1.4391941934528218) internal successors, (19432), 14365 states have internal predecessors, (19432), 4764 states have call successors, (4764), 1453 states have call predecessors, (4764), 1549 states have return successors, (6768), 4441 states have call predecessors, (6768), 4739 states have call successors, (6768) [2022-12-14 06:28:35,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19816 states to 19816 states and 30964 transitions. [2022-12-14 06:28:35,825 INFO L78 Accepts]: Start accepts. Automaton has 19816 states and 30964 transitions. Word has length 192 [2022-12-14 06:28:35,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:28:35,825 INFO L495 AbstractCegarLoop]: Abstraction has 19816 states and 30964 transitions. [2022-12-14 06:28:35,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 5 states have internal predecessors, (92), 2 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (30), 3 states have call predecessors, (30), 2 states have call successors, (30) [2022-12-14 06:28:35,826 INFO L276 IsEmpty]: Start isEmpty. Operand 19816 states and 30964 transitions. [2022-12-14 06:28:35,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2022-12-14 06:28:35,834 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:28:35,834 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:28:35,841 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7a91e64-e3e5-4f9f-9659-6dc42aba8feb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-12-14 06:28:36,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7a91e64-e3e5-4f9f-9659-6dc42aba8feb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-12-14 06:28:36,035 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:28:36,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:28:36,036 INFO L85 PathProgramCache]: Analyzing trace with hash -341196255, now seen corresponding path program 1 times [2022-12-14 06:28:36,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:28:36,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079529983] [2022-12-14 06:28:36,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:28:36,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:28:36,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:28:36,585 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 5 proven. 24 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2022-12-14 06:28:36,585 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:28:36,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079529983] [2022-12-14 06:28:36,585 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079529983] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:28:36,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570212754] [2022-12-14 06:28:36,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:28:36,586 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:28:36,586 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7a91e64-e3e5-4f9f-9659-6dc42aba8feb/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:28:36,586 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7a91e64-e3e5-4f9f-9659-6dc42aba8feb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:28:36,587 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7a91e64-e3e5-4f9f-9659-6dc42aba8feb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-14 06:28:36,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:28:36,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 2529 conjuncts, 23 conjunts are in the unsatisfiable core [2022-12-14 06:28:36,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:28:37,042 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 89 proven. 6 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-12-14 06:28:37,042 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:28:37,570 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 6 proven. 23 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2022-12-14 06:28:37,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [570212754] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:28:37,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [645290125] [2022-12-14 06:28:37,574 INFO L159 IcfgInterpreter]: Started Sifa with 119 locations of interest [2022-12-14 06:28:37,574 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 06:28:37,574 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 06:28:37,574 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 06:28:37,574 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 06:28:43,597 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 683 for LOIs [2022-12-14 06:28:49,915 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift__wrappee__executivefloor with input of size 82 for LOIs [2022-12-14 06:28:50,734 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection with input of size 72 for LOIs [2022-12-14 06:28:50,957 INFO L197 IcfgInterpreter]: Interpreting procedure isExecutiveFloorCalling with input of size 41 for LOIs [2022-12-14 06:28:50,979 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedAtCurrentFloor__wrappee__empty with input of size 62 for LOIs [2022-12-14 06:28:51,110 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 41 for LOIs [2022-12-14 06:28:51,150 INFO L197 IcfgInterpreter]: Interpreting procedure __automaton_fail with input of size 28 for LOIs [2022-12-14 06:28:51,152 INFO L197 IcfgInterpreter]: Interpreting procedure buttonForFloorIsPressed with input of size 71 for LOIs [2022-12-14 06:28:51,169 INFO L197 IcfgInterpreter]: Interpreting procedure initTopDown with input of size 607 for LOIs [2022-12-14 06:28:53,234 INFO L197 IcfgInterpreter]: Interpreting procedure initFloors with input of size 581 for LOIs [2022-12-14 06:28:53,431 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 27 for LOIs [2022-12-14 06:28:53,432 INFO L197 IcfgInterpreter]: Interpreting procedure continueInDirection with input of size 51 for LOIs [2022-12-14 06:28:53,504 INFO L197 IcfgInterpreter]: Interpreting procedure isTopFloor with input of size 45 for LOIs [2022-12-14 06:28:53,506 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentHeading with input of size 53 for LOIs [2022-12-14 06:28:53,514 INFO L197 IcfgInterpreter]: Interpreting procedure bobCall with input of size 581 for LOIs [2022-12-14 06:28:56,918 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 585 for LOIs [2022-12-14 06:28:57,514 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 513 for LOIs [2022-12-14 06:28:57,658 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 06:29:57,457 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '348426#(and (= ~executiveFloor~0 4) (= ~currentHeading~0 0) (= ~head~0.offset 0) (= ~expectedDirection~0 1) (= ~head~0.base 0) (= |#NULL.offset| 0) (= ~blocked~0 0) (<= 0 |#StackHeapBarrier|) (= ~maximumWeight~0 100) (= ~cleanupTimeShifts~0 12) (= |#NULL.base| 0))' at error location [2022-12-14 06:29:57,457 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 06:29:57,457 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 06:29:57,457 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9, 10] total 24 [2022-12-14 06:29:57,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007562018] [2022-12-14 06:29:57,457 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 06:29:57,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-14 06:29:57,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:29:57,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-14 06:29:57,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=12903, Unknown=0, NotChecked=0, Total=13806 [2022-12-14 06:29:57,460 INFO L87 Difference]: Start difference. First operand 19816 states and 30964 transitions. Second operand has 24 states, 21 states have (on average 9.571428571428571) internal successors, (201), 22 states have internal predecessors, (201), 11 states have call successors, (77), 9 states have call predecessors, (77), 13 states have return successors, (78), 16 states have call predecessors, (78), 11 states have call successors, (78) [2022-12-14 06:30:09,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:30:09,684 INFO L93 Difference]: Finished difference Result 61388 states and 101292 transitions. [2022-12-14 06:30:09,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-12-14 06:30:09,684 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 21 states have (on average 9.571428571428571) internal successors, (201), 22 states have internal predecessors, (201), 11 states have call successors, (77), 9 states have call predecessors, (77), 13 states have return successors, (78), 16 states have call predecessors, (78), 11 states have call successors, (78) Word has length 195 [2022-12-14 06:30:09,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:30:09,852 INFO L225 Difference]: With dead ends: 61388 [2022-12-14 06:30:09,852 INFO L226 Difference]: Without dead ends: 42915 [2022-12-14 06:30:09,943 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 706 GetRequests, 497 SyntacticMatches, 14 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16873 ImplicationChecksByTransitivity, 61.4s TimeCoverageRelationStatistics Valid=2457, Invalid=36155, Unknown=0, NotChecked=0, Total=38612 [2022-12-14 06:30:09,944 INFO L413 NwaCegarLoop]: 697 mSDtfsCounter, 4502 mSDsluCounter, 5807 mSDsCounter, 0 mSdLazyCounter, 16083 mSolverCounterSat, 3168 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4600 SdHoareTripleChecker+Valid, 6504 SdHoareTripleChecker+Invalid, 19251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 3168 IncrementalHoareTripleChecker+Valid, 16083 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.7s IncrementalHoareTripleChecker+Time [2022-12-14 06:30:09,944 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4600 Valid, 6504 Invalid, 19251 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [3168 Valid, 16083 Invalid, 0 Unknown, 0 Unchecked, 7.7s Time] [2022-12-14 06:30:09,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42915 states. [2022-12-14 06:30:12,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42915 to 38874. [2022-12-14 06:30:12,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38874 states, 26540 states have (on average 1.4194046721929163) internal successors, (37671), 28180 states have internal predecessors, (37671), 9080 states have call successors, (9080), 2870 states have call predecessors, (9080), 3253 states have return successors, (15074), 8631 states have call predecessors, (15074), 9037 states have call successors, (15074) [2022-12-14 06:30:12,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38874 states to 38874 states and 61825 transitions. [2022-12-14 06:30:12,481 INFO L78 Accepts]: Start accepts. Automaton has 38874 states and 61825 transitions. Word has length 195 [2022-12-14 06:30:12,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:30:12,482 INFO L495 AbstractCegarLoop]: Abstraction has 38874 states and 61825 transitions. [2022-12-14 06:30:12,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 21 states have (on average 9.571428571428571) internal successors, (201), 22 states have internal predecessors, (201), 11 states have call successors, (77), 9 states have call predecessors, (77), 13 states have return successors, (78), 16 states have call predecessors, (78), 11 states have call successors, (78) [2022-12-14 06:30:12,482 INFO L276 IsEmpty]: Start isEmpty. Operand 38874 states and 61825 transitions. [2022-12-14 06:30:12,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2022-12-14 06:30:12,487 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:30:12,487 INFO L195 NwaCegarLoop]: trace histogram [7, 5, 5, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-12-14 06:30:12,494 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7a91e64-e3e5-4f9f-9659-6dc42aba8feb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-14 06:30:12,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7a91e64-e3e5-4f9f-9659-6dc42aba8feb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-12-14 06:30:12,689 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:30:12,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:30:12,690 INFO L85 PathProgramCache]: Analyzing trace with hash -1189042668, now seen corresponding path program 1 times [2022-12-14 06:30:12,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:30:12,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222155802] [2022-12-14 06:30:12,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:30:12,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:30:12,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:30:13,270 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 10 proven. 28 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2022-12-14 06:30:13,270 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:30:13,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222155802] [2022-12-14 06:30:13,270 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222155802] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:30:13,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888517220] [2022-12-14 06:30:13,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:30:13,271 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:30:13,271 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7a91e64-e3e5-4f9f-9659-6dc42aba8feb/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:30:13,272 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7a91e64-e3e5-4f9f-9659-6dc42aba8feb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:30:13,272 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7a91e64-e3e5-4f9f-9659-6dc42aba8feb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-14 06:30:13,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:30:13,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 2526 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-14 06:30:13,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:30:13,719 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 50 proven. 2 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-12-14 06:30:13,720 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:30:14,154 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 36 proven. 2 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2022-12-14 06:30:14,155 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1888517220] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:30:14,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [248567361] [2022-12-14 06:30:14,157 INFO L159 IcfgInterpreter]: Started Sifa with 111 locations of interest [2022-12-14 06:30:14,157 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 06:30:14,158 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 06:30:14,158 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 06:30:14,158 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 06:30:20,488 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 685 for LOIs [2022-12-14 06:30:26,797 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift__wrappee__executivefloor with input of size 59 for LOIs [2022-12-14 06:30:27,577 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection with input of size 56 for LOIs [2022-12-14 06:30:27,942 INFO L197 IcfgInterpreter]: Interpreting procedure isExecutiveFloorCalling with input of size 45 for LOIs [2022-12-14 06:30:27,965 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedAtCurrentFloor__wrappee__empty with input of size 45 for LOIs [2022-12-14 06:30:28,062 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 73 for LOIs [2022-12-14 06:30:28,081 INFO L197 IcfgInterpreter]: Interpreting procedure __automaton_fail with input of size 29 for LOIs [2022-12-14 06:30:28,082 INFO L197 IcfgInterpreter]: Interpreting procedure buttonForFloorIsPressed with input of size 55 for LOIs [2022-12-14 06:30:28,094 INFO L197 IcfgInterpreter]: Interpreting procedure initTopDown with input of size 607 for LOIs [2022-12-14 06:30:30,142 INFO L197 IcfgInterpreter]: Interpreting procedure initFloors with input of size 581 for LOIs [2022-12-14 06:30:30,337 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 28 for LOIs [2022-12-14 06:30:30,339 INFO L197 IcfgInterpreter]: Interpreting procedure continueInDirection with input of size 55 for LOIs [2022-12-14 06:30:30,352 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentHeading with input of size 54 for LOIs [2022-12-14 06:30:30,359 INFO L197 IcfgInterpreter]: Interpreting procedure bobCall with input of size 581 for LOIs [2022-12-14 06:30:33,811 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 585 for LOIs [2022-12-14 06:30:34,542 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 513 for LOIs [2022-12-14 06:30:34,685 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 06:31:38,895 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '491923#(and (= ~executiveFloor~0 4) (= ~head~0.offset 0) (= ~currentHeading~0 1) (= ~head~0.base 0) (= |#NULL.offset| 0) (= 0 (+ ~expectedDirection~0 1)) (= ~blocked~0 0) (<= 0 |#StackHeapBarrier|) (= ~maximumWeight~0 100) (= ~cleanupTimeShifts~0 12) (= |#NULL.base| 0))' at error location [2022-12-14 06:31:38,895 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 06:31:38,895 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 06:31:38,895 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 13] total 30 [2022-12-14 06:31:38,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171837949] [2022-12-14 06:31:38,895 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 06:31:38,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-12-14 06:31:38,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:31:38,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-12-14 06:31:38,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=943, Invalid=12629, Unknown=0, NotChecked=0, Total=13572 [2022-12-14 06:31:38,898 INFO L87 Difference]: Start difference. First operand 38874 states and 61825 transitions. Second operand has 30 states, 24 states have (on average 7.333333333333333) internal successors, (176), 25 states have internal predecessors, (176), 14 states have call successors, (64), 10 states have call predecessors, (64), 12 states have return successors, (64), 20 states have call predecessors, (64), 14 states have call successors, (64)