./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec3_product22.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e093516-3c0b-4816-94f4-7fd4d5705a71/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e093516-3c0b-4816-94f4-7fd4d5705a71/bin/utaipan-ByfvJB40ur/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e093516-3c0b-4816-94f4-7fd4d5705a71/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e093516-3c0b-4816-94f4-7fd4d5705a71/bin/utaipan-ByfvJB40ur/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec3_product22.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e093516-3c0b-4816-94f4-7fd4d5705a71/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e093516-3c0b-4816-94f4-7fd4d5705a71/bin/utaipan-ByfvJB40ur --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 10f09c8c5639b403d441157c6cb90f176690981c36f4af5417d0103735cbe364 --- 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-38b53e6 [2022-11-25 23:54:36,986 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 23:54:36,988 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 23:54:37,028 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 23:54:37,029 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 23:54:37,032 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 23:54:37,035 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 23:54:37,038 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 23:54:37,040 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 23:54:37,046 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 23:54:37,047 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 23:54:37,049 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 23:54:37,050 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 23:54:37,052 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 23:54:37,054 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 23:54:37,056 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 23:54:37,057 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 23:54:37,058 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 23:54:37,060 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 23:54:37,066 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 23:54:37,069 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 23:54:37,070 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 23:54:37,071 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 23:54:37,072 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 23:54:37,075 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 23:54:37,075 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 23:54:37,075 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 23:54:37,076 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 23:54:37,077 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 23:54:37,077 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 23:54:37,078 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 23:54:37,079 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 23:54:37,079 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 23:54:37,080 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 23:54:37,081 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 23:54:37,081 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 23:54:37,082 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 23:54:37,082 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 23:54:37,083 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 23:54:37,084 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 23:54:37,084 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 23:54:37,085 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e093516-3c0b-4816-94f4-7fd4d5705a71/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-25 23:54:37,115 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 23:54:37,117 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 23:54:37,118 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 23:54:37,118 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 23:54:37,119 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 23:54:37,119 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 23:54:37,119 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-25 23:54:37,120 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-25 23:54:37,120 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-25 23:54:37,120 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-25 23:54:37,121 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-25 23:54:37,121 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-25 23:54:37,121 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-25 23:54:37,122 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-25 23:54:37,122 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-25 23:54:37,122 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-25 23:54:37,122 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-25 23:54:37,123 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-25 23:54:37,123 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 23:54:37,123 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 23:54:37,124 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 23:54:37,124 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 23:54:37,124 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 23:54:37,124 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-25 23:54:37,124 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 23:54:37,125 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-25 23:54:37,125 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 23:54:37,125 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-25 23:54:37,125 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 23:54:37,125 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-25 23:54:37,126 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 23:54:37,126 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 23:54:37,126 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 23:54:37,126 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 23:54:37,126 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-25 23:54:37,127 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 23:54:37,127 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-25 23:54:37,127 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-25 23:54:37,127 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 23:54:37,127 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-25 23:54:37,128 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-25 23:54:37,128 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_5e093516-3c0b-4816-94f4-7fd4d5705a71/bin/utaipan-ByfvJB40ur/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e093516-3c0b-4816-94f4-7fd4d5705a71/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 10f09c8c5639b403d441157c6cb90f176690981c36f4af5417d0103735cbe364 [2022-11-25 23:54:37,454 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 23:54:37,489 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 23:54:37,492 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 23:54:37,493 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 23:54:37,493 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 23:54:37,495 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e093516-3c0b-4816-94f4-7fd4d5705a71/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/product-lines/elevator_spec3_product22.cil.c [2022-11-25 23:54:40,598 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 23:54:40,976 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 23:54:40,977 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e093516-3c0b-4816-94f4-7fd4d5705a71/sv-benchmarks/c/product-lines/elevator_spec3_product22.cil.c [2022-11-25 23:54:41,002 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e093516-3c0b-4816-94f4-7fd4d5705a71/bin/utaipan-ByfvJB40ur/data/e42c44721/6e7ba13893cd4af29d456a7e7df0b8d3/FLAGcca506bec [2022-11-25 23:54:41,017 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e093516-3c0b-4816-94f4-7fd4d5705a71/bin/utaipan-ByfvJB40ur/data/e42c44721/6e7ba13893cd4af29d456a7e7df0b8d3 [2022-11-25 23:54:41,020 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 23:54:41,021 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 23:54:41,022 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 23:54:41,023 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 23:54:41,026 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 23:54:41,027 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 11:54:41" (1/1) ... [2022-11-25 23:54:41,028 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@27ff3d62 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:54:41, skipping insertion in model container [2022-11-25 23:54:41,029 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 11:54:41" (1/1) ... [2022-11-25 23:54:41,036 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 23:54:41,104 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 23:54:41,348 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_5e093516-3c0b-4816-94f4-7fd4d5705a71/sv-benchmarks/c/product-lines/elevator_spec3_product22.cil.c[3205,3218] [2022-11-25 23:54:41,686 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 23:54:41,711 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 23:54:41,739 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_5e093516-3c0b-4816-94f4-7fd4d5705a71/sv-benchmarks/c/product-lines/elevator_spec3_product22.cil.c[3205,3218] [2022-11-25 23:54:41,899 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 23:54:41,941 INFO L208 MainTranslator]: Completed translation [2022-11-25 23:54:41,942 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:54:41 WrapperNode [2022-11-25 23:54:41,942 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 23:54:41,943 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 23:54:41,943 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 23:54:41,944 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 23:54:41,951 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:54:41" (1/1) ... [2022-11-25 23:54:42,019 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:54:41" (1/1) ... [2022-11-25 23:54:42,080 INFO L138 Inliner]: procedures = 92, calls = 351, calls flagged for inlining = 26, calls inlined = 22, statements flattened = 905 [2022-11-25 23:54:42,087 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 23:54:42,088 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 23:54:42,088 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 23:54:42,088 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 23:54:42,098 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:54:41" (1/1) ... [2022-11-25 23:54:42,099 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:54:41" (1/1) ... [2022-11-25 23:54:42,106 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:54:41" (1/1) ... [2022-11-25 23:54:42,106 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:54:41" (1/1) ... [2022-11-25 23:54:42,126 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:54:41" (1/1) ... [2022-11-25 23:54:42,140 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:54:41" (1/1) ... [2022-11-25 23:54:42,145 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:54:41" (1/1) ... [2022-11-25 23:54:42,149 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:54:41" (1/1) ... [2022-11-25 23:54:42,157 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 23:54:42,158 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 23:54:42,158 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 23:54:42,159 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 23:54:42,159 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:54:41" (1/1) ... [2022-11-25 23:54:42,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 23:54:42,200 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e093516-3c0b-4816-94f4-7fd4d5705a71/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:54:42,225 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e093516-3c0b-4816-94f4-7fd4d5705a71/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 23:54:42,269 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e093516-3c0b-4816-94f4-7fd4d5705a71/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 23:54:42,308 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 23:54:42,308 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2022-11-25 23:54:42,308 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2022-11-25 23:54:42,309 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2022-11-25 23:54:42,309 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2022-11-25 23:54:42,309 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2022-11-25 23:54:42,309 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2022-11-25 23:54:42,309 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2022-11-25 23:54:42,310 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2022-11-25 23:54:42,310 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2022-11-25 23:54:42,310 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2022-11-25 23:54:42,310 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2022-11-25 23:54:42,310 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2022-11-25 23:54:42,310 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2022-11-25 23:54:42,311 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2022-11-25 23:54:42,311 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2022-11-25 23:54:42,311 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2022-11-25 23:54:42,311 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2022-11-25 23:54:42,311 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2022-11-25 23:54:42,311 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2022-11-25 23:54:42,312 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2022-11-25 23:54:42,312 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2022-11-25 23:54:42,313 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2022-11-25 23:54:42,313 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2022-11-25 23:54:42,313 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2022-11-25 23:54:42,314 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2022-11-25 23:54:42,314 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2022-11-25 23:54:42,315 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2022-11-25 23:54:42,315 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2022-11-25 23:54:42,315 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2022-11-25 23:54:42,316 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2022-11-25 23:54:42,317 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2022-11-25 23:54:42,317 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2022-11-25 23:54:42,346 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2022-11-25 23:54:42,347 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2022-11-25 23:54:42,347 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2022-11-25 23:54:42,347 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2022-11-25 23:54:42,347 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2022-11-25 23:54:42,347 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2022-11-25 23:54:42,347 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2022-11-25 23:54:42,347 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2022-11-25 23:54:42,348 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 23:54:42,348 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2022-11-25 23:54:42,348 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2022-11-25 23:54:42,348 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2022-11-25 23:54:42,349 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2022-11-25 23:54:42,349 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2022-11-25 23:54:42,349 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2022-11-25 23:54:42,350 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2022-11-25 23:54:42,350 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2022-11-25 23:54:42,350 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__twothirdsfull [2022-11-25 23:54:42,350 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__twothirdsfull [2022-11-25 23:54:42,350 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__weight [2022-11-25 23:54:42,351 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__weight [2022-11-25 23:54:42,351 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 23:54:42,351 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 23:54:42,351 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2022-11-25 23:54:42,351 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2022-11-25 23:54:42,584 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 23:54:42,586 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 23:54:43,870 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 23:54:44,739 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 23:54:44,739 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-25 23:54:44,745 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 11:54:44 BoogieIcfgContainer [2022-11-25 23:54:44,745 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 23:54:44,750 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 23:54:44,750 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 23:54:44,753 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 23:54:44,754 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 11:54:41" (1/3) ... [2022-11-25 23:54:44,756 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c9a2cb1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 11:54:44, skipping insertion in model container [2022-11-25 23:54:44,756 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:54:41" (2/3) ... [2022-11-25 23:54:44,757 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c9a2cb1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 11:54:44, skipping insertion in model container [2022-11-25 23:54:44,758 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 11:54:44" (3/3) ... [2022-11-25 23:54:44,759 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec3_product22.cil.c [2022-11-25 23:54:44,779 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 23:54:44,779 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-25 23:54:44,864 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 23:54:44,872 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;@59f55f99, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 23:54:44,873 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-25 23:54:44,879 INFO L276 IsEmpty]: Start isEmpty. Operand has 411 states, 274 states have (on average 1.572992700729927) internal successors, (431), 294 states have internal predecessors, (431), 108 states have call successors, (108), 27 states have call predecessors, (108), 27 states have return successors, (108), 104 states have call predecessors, (108), 108 states have call successors, (108) [2022-11-25 23:54:44,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-25 23:54:44,890 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:54:44,891 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] [2022-11-25 23:54:44,892 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:54:44,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:54:44,897 INFO L85 PathProgramCache]: Analyzing trace with hash -1214067236, now seen corresponding path program 1 times [2022-11-25 23:54:44,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:54:44,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47345939] [2022-11-25 23:54:44,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:54:44,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:54:45,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:54:45,900 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 23:54:45,900 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:54:45,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47345939] [2022-11-25 23:54:45,901 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47345939] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:54:45,902 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:54:45,902 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-25 23:54:45,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374924507] [2022-11-25 23:54:45,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:54:45,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 23:54:45,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:54:45,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 23:54:45,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-25 23:54:45,958 INFO L87 Difference]: Start difference. First operand has 411 states, 274 states have (on average 1.572992700729927) internal successors, (431), 294 states have internal predecessors, (431), 108 states have call successors, (108), 27 states have call predecessors, (108), 27 states have return successors, (108), 104 states have call predecessors, (108), 108 states have call successors, (108) Second operand has 6 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 4 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-25 23:54:47,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:54:47,125 INFO L93 Difference]: Finished difference Result 1171 states and 1873 transitions. [2022-11-25 23:54:47,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-25 23:54:47,128 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 4 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 49 [2022-11-25 23:54:47,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:54:47,147 INFO L225 Difference]: With dead ends: 1171 [2022-11-25 23:54:47,147 INFO L226 Difference]: Without dead ends: 762 [2022-11-25 23:54:47,157 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-11-25 23:54:47,160 INFO L413 NwaCegarLoop]: 701 mSDtfsCounter, 545 mSDsluCounter, 2427 mSDsCounter, 0 mSdLazyCounter, 686 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 549 SdHoareTripleChecker+Valid, 3128 SdHoareTripleChecker+Invalid, 739 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 686 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-25 23:54:47,161 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [549 Valid, 3128 Invalid, 739 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 686 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-25 23:54:47,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 762 states. [2022-11-25 23:54:47,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 762 to 754. [2022-11-25 23:54:47,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 754 states, 505 states have (on average 1.500990099009901) internal successors, (758), 539 states have internal predecessors, (758), 200 states have call successors, (200), 51 states have call predecessors, (200), 48 states have return successors, (203), 190 states have call predecessors, (203), 196 states have call successors, (203) [2022-11-25 23:54:47,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 754 states to 754 states and 1161 transitions. [2022-11-25 23:54:47,286 INFO L78 Accepts]: Start accepts. Automaton has 754 states and 1161 transitions. Word has length 49 [2022-11-25 23:54:47,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:54:47,287 INFO L495 AbstractCegarLoop]: Abstraction has 754 states and 1161 transitions. [2022-11-25 23:54:47,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 4 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-25 23:54:47,288 INFO L276 IsEmpty]: Start isEmpty. Operand 754 states and 1161 transitions. [2022-11-25 23:54:47,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-25 23:54:47,290 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:54:47,291 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] [2022-11-25 23:54:47,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 23:54:47,291 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:54:47,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:54:47,292 INFO L85 PathProgramCache]: Analyzing trace with hash 76487303, now seen corresponding path program 1 times [2022-11-25 23:54:47,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:54:47,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14812972] [2022-11-25 23:54:47,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:54:47,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:54:47,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:54:47,592 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 23:54:47,593 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:54:47,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14812972] [2022-11-25 23:54:47,594 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14812972] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:54:47,594 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:54:47,594 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 23:54:47,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950980891] [2022-11-25 23:54:47,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:54:47,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 23:54:47,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:54:47,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 23:54:47,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 23:54:47,598 INFO L87 Difference]: Start difference. First operand 754 states and 1161 transitions. 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) [2022-11-25 23:54:47,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:54:47,998 INFO L93 Difference]: Finished difference Result 2232 states and 3471 transitions. [2022-11-25 23:54:47,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 23:54:47,999 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 [2022-11-25 23:54:48,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:54:48,019 INFO L225 Difference]: With dead ends: 2232 [2022-11-25 23:54:48,019 INFO L226 Difference]: Without dead ends: 1491 [2022-11-25 23:54:48,028 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 [2022-11-25 23:54:48,031 INFO L413 NwaCegarLoop]: 732 mSDtfsCounter, 602 mSDsluCounter, 581 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 602 SdHoareTripleChecker+Valid, 1313 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-25 23:54:48,032 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [602 Valid, 1313 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-25 23:54:48,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1491 states. [2022-11-25 23:54:48,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1491 to 1419. [2022-11-25 23:54:48,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1419 states, 979 states have (on average 1.5148110316649643) internal successors, (1483), 1031 states have internal predecessors, (1483), 353 states have call successors, (353), 91 states have call predecessors, (353), 86 states have return successors, (373), 324 states have call predecessors, (373), 347 states have call successors, (373) [2022-11-25 23:54:48,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1419 states to 1419 states and 2209 transitions. [2022-11-25 23:54:48,182 INFO L78 Accepts]: Start accepts. Automaton has 1419 states and 2209 transitions. Word has length 50 [2022-11-25 23:54:48,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:54:48,182 INFO L495 AbstractCegarLoop]: Abstraction has 1419 states and 2209 transitions. [2022-11-25 23:54:48,183 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) [2022-11-25 23:54:48,183 INFO L276 IsEmpty]: Start isEmpty. Operand 1419 states and 2209 transitions. [2022-11-25 23:54:48,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-11-25 23:54:48,195 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:54:48,196 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:54:48,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-25 23:54:48,196 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:54:48,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:54:48,206 INFO L85 PathProgramCache]: Analyzing trace with hash -1414746024, now seen corresponding path program 1 times [2022-11-25 23:54:48,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:54:48,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681140002] [2022-11-25 23:54:48,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:54:48,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:54:48,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:54:48,775 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 23:54:48,775 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:54:48,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681140002] [2022-11-25 23:54:48,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681140002] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:54:48,776 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:54:48,776 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-25 23:54:48,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844149774] [2022-11-25 23:54:48,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:54:48,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 23:54:48,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:54:48,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 23:54:48,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-25 23:54:48,779 INFO L87 Difference]: Start difference. First operand 1419 states and 2209 transitions. Second operand has 6 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-25 23:54:49,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:54:49,850 INFO L93 Difference]: Finished difference Result 3701 states and 5970 transitions. [2022-11-25 23:54:49,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-25 23:54:49,851 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) Word has length 87 [2022-11-25 23:54:49,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:54:49,876 INFO L225 Difference]: With dead ends: 3701 [2022-11-25 23:54:49,876 INFO L226 Difference]: Without dead ends: 2294 [2022-11-25 23:54:49,886 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 [2022-11-25 23:54:49,887 INFO L413 NwaCegarLoop]: 760 mSDtfsCounter, 676 mSDsluCounter, 2632 mSDsCounter, 0 mSdLazyCounter, 578 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 696 SdHoareTripleChecker+Valid, 3392 SdHoareTripleChecker+Invalid, 626 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 578 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-25 23:54:49,888 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [696 Valid, 3392 Invalid, 626 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 578 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-25 23:54:49,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2294 states. [2022-11-25 23:54:50,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2294 to 2080. [2022-11-25 23:54:50,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2080 states, 1439 states have (on average 1.507991660875608) internal successors, (2170), 1523 states have internal predecessors, (2170), 512 states have call successors, (512), 135 states have call predecessors, (512), 128 states have return successors, (581), 464 states have call predecessors, (581), 504 states have call successors, (581) [2022-11-25 23:54:50,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2080 states to 2080 states and 3263 transitions. [2022-11-25 23:54:50,063 INFO L78 Accepts]: Start accepts. Automaton has 2080 states and 3263 transitions. Word has length 87 [2022-11-25 23:54:50,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:54:50,066 INFO L495 AbstractCegarLoop]: Abstraction has 2080 states and 3263 transitions. [2022-11-25 23:54:50,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-25 23:54:50,066 INFO L276 IsEmpty]: Start isEmpty. Operand 2080 states and 3263 transitions. [2022-11-25 23:54:50,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-11-25 23:54:50,070 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:54:50,070 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:54:50,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-25 23:54:50,071 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:54:50,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:54:50,071 INFO L85 PathProgramCache]: Analyzing trace with hash 11720995, now seen corresponding path program 1 times [2022-11-25 23:54:50,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:54:50,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819456811] [2022-11-25 23:54:50,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:54:50,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:54:50,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:54:50,363 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 23:54:50,363 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:54:50,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819456811] [2022-11-25 23:54:50,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819456811] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:54:50,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368467618] [2022-11-25 23:54:50,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:54:50,364 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:54:50,364 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e093516-3c0b-4816-94f4-7fd4d5705a71/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:54:50,371 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e093516-3c0b-4816-94f4-7fd4d5705a71/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:54:50,372 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e093516-3c0b-4816-94f4-7fd4d5705a71/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 23:54:50,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:54:50,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 1806 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-25 23:54:50,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:54:50,957 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:54:50,958 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:54:50,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1368467618] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:54:50,958 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 23:54:50,958 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-25 23:54:50,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078142049] [2022-11-25 23:54:50,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:54:50,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 23:54:50,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:54:50,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 23:54:50,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-25 23:54:50,961 INFO L87 Difference]: Start difference. First operand 2080 states and 3263 transitions. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-11-25 23:54:51,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:54:51,386 INFO L93 Difference]: Finished difference Result 5950 states and 9595 transitions. [2022-11-25 23:54:51,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 23:54:51,387 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 86 [2022-11-25 23:54:51,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:54:51,424 INFO L225 Difference]: With dead ends: 5950 [2022-11-25 23:54:51,425 INFO L226 Difference]: Without dead ends: 3882 [2022-11-25 23:54:51,445 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-25 23:54:51,451 INFO L413 NwaCegarLoop]: 687 mSDtfsCounter, 565 mSDsluCounter, 508 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 565 SdHoareTripleChecker+Valid, 1195 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 23:54:51,453 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [565 Valid, 1195 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 23:54:51,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3882 states. [2022-11-25 23:54:51,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3882 to 3764. [2022-11-25 23:54:51,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3764 states, 2621 states have (on average 1.5215566577642121) internal successors, (3988), 2791 states have internal predecessors, (3988), 903 states have call successors, (903), 240 states have call predecessors, (903), 239 states have return successors, (1072), 818 states have call predecessors, (1072), 895 states have call successors, (1072) [2022-11-25 23:54:51,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3764 states to 3764 states and 5963 transitions. [2022-11-25 23:54:51,711 INFO L78 Accepts]: Start accepts. Automaton has 3764 states and 5963 transitions. Word has length 86 [2022-11-25 23:54:51,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:54:51,711 INFO L495 AbstractCegarLoop]: Abstraction has 3764 states and 5963 transitions. [2022-11-25 23:54:51,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-11-25 23:54:51,712 INFO L276 IsEmpty]: Start isEmpty. Operand 3764 states and 5963 transitions. [2022-11-25 23:54:51,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-11-25 23:54:51,717 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:54:51,717 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:54:51,730 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e093516-3c0b-4816-94f4-7fd4d5705a71/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-25 23:54:51,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e093516-3c0b-4816-94f4-7fd4d5705a71/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:54:51,926 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:54:51,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:54:51,927 INFO L85 PathProgramCache]: Analyzing trace with hash 1996251479, now seen corresponding path program 1 times [2022-11-25 23:54:51,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:54:51,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661224506] [2022-11-25 23:54:51,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:54:51,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:54:51,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:54:52,240 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 23:54:52,241 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:54:52,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661224506] [2022-11-25 23:54:52,241 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661224506] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:54:52,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241578434] [2022-11-25 23:54:52,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:54:52,242 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:54:52,242 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e093516-3c0b-4816-94f4-7fd4d5705a71/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:54:52,243 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e093516-3c0b-4816-94f4-7fd4d5705a71/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:54:52,271 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e093516-3c0b-4816-94f4-7fd4d5705a71/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-25 23:54:52,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:54:52,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 1808 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-25 23:54:52,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:54:52,794 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:54:52,794 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:54:52,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1241578434] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:54:52,794 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 23:54:52,795 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-25 23:54:52,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437372248] [2022-11-25 23:54:52,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:54:52,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 23:54:52,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:54:52,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 23:54:52,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-25 23:54:52,797 INFO L87 Difference]: Start difference. First operand 3764 states and 5963 transitions. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-11-25 23:54:53,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:54:53,251 INFO L93 Difference]: Finished difference Result 8443 states and 13531 transitions. [2022-11-25 23:54:53,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 23:54:53,252 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 87 [2022-11-25 23:54:53,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:54:53,292 INFO L225 Difference]: With dead ends: 8443 [2022-11-25 23:54:53,293 INFO L226 Difference]: Without dead ends: 4691 [2022-11-25 23:54:53,322 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-25 23:54:53,323 INFO L413 NwaCegarLoop]: 720 mSDtfsCounter, 563 mSDsluCounter, 505 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 563 SdHoareTripleChecker+Valid, 1225 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 23:54:53,324 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [563 Valid, 1225 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 23:54:53,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4691 states. [2022-11-25 23:54:53,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4691 to 4627. [2022-11-25 23:54:53,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4627 states, 3233 states have (on average 1.5310856789359728) internal successors, (4950), 3446 states have internal predecessors, (4950), 1100 states have call successors, (1100), 291 states have call predecessors, (1100), 293 states have return successors, (1306), 998 states have call predecessors, (1306), 1092 states have call successors, (1306) [2022-11-25 23:54:53,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4627 states to 4627 states and 7356 transitions. [2022-11-25 23:54:53,621 INFO L78 Accepts]: Start accepts. Automaton has 4627 states and 7356 transitions. Word has length 87 [2022-11-25 23:54:53,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:54:53,622 INFO L495 AbstractCegarLoop]: Abstraction has 4627 states and 7356 transitions. [2022-11-25 23:54:53,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-11-25 23:54:53,622 INFO L276 IsEmpty]: Start isEmpty. Operand 4627 states and 7356 transitions. [2022-11-25 23:54:53,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-11-25 23:54:53,629 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:54:53,630 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:54:53,642 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e093516-3c0b-4816-94f4-7fd4d5705a71/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-25 23:54:53,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e093516-3c0b-4816-94f4-7fd4d5705a71/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:54:53,837 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:54:53,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:54:53,838 INFO L85 PathProgramCache]: Analyzing trace with hash 943239580, now seen corresponding path program 1 times [2022-11-25 23:54:53,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:54:53,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897529281] [2022-11-25 23:54:53,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:54:53,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:54:53,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:54:54,653 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 23:54:54,653 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:54:54,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897529281] [2022-11-25 23:54:54,654 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897529281] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:54:54,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375426267] [2022-11-25 23:54:54,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:54:54,654 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:54:54,655 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e093516-3c0b-4816-94f4-7fd4d5705a71/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:54:54,656 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e093516-3c0b-4816-94f4-7fd4d5705a71/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:54:54,689 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e093516-3c0b-4816-94f4-7fd4d5705a71/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-25 23:54:55,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:54:55,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 1833 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-25 23:54:55,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:54:55,175 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 23:54:55,175 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:54:55,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [375426267] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:54:55,175 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 23:54:55,176 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 13 [2022-11-25 23:54:55,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842761915] [2022-11-25 23:54:55,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:54:55,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 23:54:55,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:54:55,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 23:54:55,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2022-11-25 23:54:55,179 INFO L87 Difference]: Start difference. First operand 4627 states and 7356 transitions. Second operand has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-25 23:54:55,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:54:55,830 INFO L93 Difference]: Finished difference Result 9113 states and 14772 transitions. [2022-11-25 23:54:55,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 23:54:55,831 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 93 [2022-11-25 23:54:55,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:54:55,872 INFO L225 Difference]: With dead ends: 9113 [2022-11-25 23:54:55,873 INFO L226 Difference]: Without dead ends: 5707 [2022-11-25 23:54:55,895 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2022-11-25 23:54:55,895 INFO L413 NwaCegarLoop]: 640 mSDtfsCounter, 177 mSDsluCounter, 1786 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 2426 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-25 23:54:55,896 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [177 Valid, 2426 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-25 23:54:55,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5707 states. [2022-11-25 23:54:56,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5707 to 5163. [2022-11-25 23:54:56,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5163 states, 3539 states have (on average 1.5241593670528397) internal successors, (5394), 3825 states have internal predecessors, (5394), 1323 states have call successors, (1323), 291 states have call predecessors, (1323), 300 states have return successors, (1557), 1197 states have call predecessors, (1557), 1315 states have call successors, (1557) [2022-11-25 23:54:56,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5163 states to 5163 states and 8274 transitions. [2022-11-25 23:54:56,370 INFO L78 Accepts]: Start accepts. Automaton has 5163 states and 8274 transitions. Word has length 93 [2022-11-25 23:54:56,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:54:56,371 INFO L495 AbstractCegarLoop]: Abstraction has 5163 states and 8274 transitions. [2022-11-25 23:54:56,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-25 23:54:56,372 INFO L276 IsEmpty]: Start isEmpty. Operand 5163 states and 8274 transitions. [2022-11-25 23:54:56,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-11-25 23:54:56,376 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:54:56,376 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2022-11-25 23:54:56,391 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e093516-3c0b-4816-94f4-7fd4d5705a71/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-25 23:54:56,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e093516-3c0b-4816-94f4-7fd4d5705a71/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:54:56,591 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:54:56,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:54:56,592 INFO L85 PathProgramCache]: Analyzing trace with hash 834901981, now seen corresponding path program 1 times [2022-11-25 23:54:56,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:54:56,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273681658] [2022-11-25 23:54:56,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:54:56,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:54:56,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:54:57,433 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-25 23:54:57,434 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:54:57,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273681658] [2022-11-25 23:54:57,434 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273681658] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:54:57,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204734587] [2022-11-25 23:54:57,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:54:57,436 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:54:57,436 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e093516-3c0b-4816-94f4-7fd4d5705a71/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:54:57,439 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e093516-3c0b-4816-94f4-7fd4d5705a71/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:54:57,463 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e093516-3c0b-4816-94f4-7fd4d5705a71/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-25 23:54:57,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:54:57,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 1839 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-25 23:54:57,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:54:58,127 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 23:54:58,128 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:54:58,733 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-25 23:54:58,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1204734587] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-25 23:54:58,734 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-25 23:54:58,734 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10, 9] total 22 [2022-11-25 23:54:58,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78538914] [2022-11-25 23:54:58,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:54:58,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-25 23:54:58,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:54:58,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-25 23:54:58,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=405, Unknown=0, NotChecked=0, Total=462 [2022-11-25 23:54:58,737 INFO L87 Difference]: Start difference. First operand 5163 states and 8274 transitions. Second operand has 9 states, 9 states have (on average 6.111111111111111) internal successors, (55), 9 states have internal predecessors, (55), 7 states have call successors, (19), 4 states have call predecessors, (19), 5 states have return successors, (17), 7 states have call predecessors, (17), 7 states have call successors, (17) [2022-11-25 23:55:01,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:55:01,947 INFO L93 Difference]: Finished difference Result 9851 states and 15893 transitions. [2022-11-25 23:55:01,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-25 23:55:01,948 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.111111111111111) internal successors, (55), 9 states have internal predecessors, (55), 7 states have call successors, (19), 4 states have call predecessors, (19), 5 states have return successors, (17), 7 states have call predecessors, (17), 7 states have call successors, (17) Word has length 95 [2022-11-25 23:55:01,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:55:02,003 INFO L225 Difference]: With dead ends: 9851 [2022-11-25 23:55:02,003 INFO L226 Difference]: Without dead ends: 5933 [2022-11-25 23:55:02,033 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 177 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=127, Invalid=865, Unknown=0, NotChecked=0, Total=992 [2022-11-25 23:55:02,034 INFO L413 NwaCegarLoop]: 615 mSDtfsCounter, 1226 mSDsluCounter, 1777 mSDsCounter, 0 mSdLazyCounter, 2506 mSolverCounterSat, 214 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1313 SdHoareTripleChecker+Valid, 2392 SdHoareTripleChecker+Invalid, 2720 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 214 IncrementalHoareTripleChecker+Valid, 2506 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-11-25 23:55:02,035 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1313 Valid, 2392 Invalid, 2720 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [214 Valid, 2506 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-11-25 23:55:02,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5933 states. [2022-11-25 23:55:02,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5933 to 4906. [2022-11-25 23:55:02,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4906 states, 3424 states have (on average 1.5073014018691588) internal successors, (5161), 3637 states have internal predecessors, (5161), 1140 states have call successors, (1140), 297 states have call predecessors, (1140), 341 states have return successors, (1466), 1074 states have call predecessors, (1466), 1132 states have call successors, (1466) [2022-11-25 23:55:02,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4906 states to 4906 states and 7767 transitions. [2022-11-25 23:55:02,538 INFO L78 Accepts]: Start accepts. Automaton has 4906 states and 7767 transitions. Word has length 95 [2022-11-25 23:55:02,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:55:02,539 INFO L495 AbstractCegarLoop]: Abstraction has 4906 states and 7767 transitions. [2022-11-25 23:55:02,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.111111111111111) internal successors, (55), 9 states have internal predecessors, (55), 7 states have call successors, (19), 4 states have call predecessors, (19), 5 states have return successors, (17), 7 states have call predecessors, (17), 7 states have call successors, (17) [2022-11-25 23:55:02,539 INFO L276 IsEmpty]: Start isEmpty. Operand 4906 states and 7767 transitions. [2022-11-25 23:55:02,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-11-25 23:55:02,543 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:55:02,543 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:55:02,556 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e093516-3c0b-4816-94f4-7fd4d5705a71/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-25 23:55:02,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e093516-3c0b-4816-94f4-7fd4d5705a71/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:55:02,752 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:55:02,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:55:02,753 INFO L85 PathProgramCache]: Analyzing trace with hash -1021968509, now seen corresponding path program 1 times [2022-11-25 23:55:02,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:55:02,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063859031] [2022-11-25 23:55:02,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:55:02,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:55:02,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:55:03,452 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-25 23:55:03,452 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:55:03,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063859031] [2022-11-25 23:55:03,453 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063859031] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:55:03,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1386388652] [2022-11-25 23:55:03,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:55:03,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:55:03,454 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e093516-3c0b-4816-94f4-7fd4d5705a71/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:55:03,455 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e093516-3c0b-4816-94f4-7fd4d5705a71/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:55:03,467 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e093516-3c0b-4816-94f4-7fd4d5705a71/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-25 23:55:03,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:55:03,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 1839 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-25 23:55:03,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:55:04,172 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 23:55:04,172 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:55:04,718 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-25 23:55:04,718 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1386388652] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-25 23:55:04,718 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-25 23:55:04,718 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [10, 9] total 21 [2022-11-25 23:55:04,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488126083] [2022-11-25 23:55:04,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:55:04,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-25 23:55:04,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:55:04,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-25 23:55:04,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2022-11-25 23:55:04,721 INFO L87 Difference]: Start difference. First operand 4906 states and 7767 transitions. Second operand has 10 states, 9 states have (on average 6.555555555555555) internal successors, (59), 9 states have internal predecessors, (59), 5 states have call successors, (19), 5 states have call predecessors, (19), 4 states have return successors, (17), 6 states have call predecessors, (17), 4 states have call successors, (17) [2022-11-25 23:55:09,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:55:09,838 INFO L93 Difference]: Finished difference Result 13741 states and 23761 transitions. [2022-11-25 23:55:09,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-25 23:55:09,839 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 6.555555555555555) internal successors, (59), 9 states have internal predecessors, (59), 5 states have call successors, (19), 5 states have call predecessors, (19), 4 states have return successors, (17), 6 states have call predecessors, (17), 4 states have call successors, (17) Word has length 98 [2022-11-25 23:55:09,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:55:09,920 INFO L225 Difference]: With dead ends: 13741 [2022-11-25 23:55:09,921 INFO L226 Difference]: Without dead ends: 10680 [2022-11-25 23:55:09,949 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 188 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=196, Invalid=1136, Unknown=0, NotChecked=0, Total=1332 [2022-11-25 23:55:09,950 INFO L413 NwaCegarLoop]: 761 mSDtfsCounter, 2707 mSDsluCounter, 2636 mSDsCounter, 0 mSdLazyCounter, 3194 mSolverCounterSat, 1343 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2804 SdHoareTripleChecker+Valid, 3397 SdHoareTripleChecker+Invalid, 4537 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1343 IncrementalHoareTripleChecker+Valid, 3194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-11-25 23:55:09,950 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2804 Valid, 3397 Invalid, 4537 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1343 Valid, 3194 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2022-11-25 23:55:09,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10680 states. [2022-11-25 23:55:10,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10680 to 9547. [2022-11-25 23:55:10,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9547 states, 6772 states have (on average 1.514619019492026) internal successors, (10257), 7121 states have internal predecessors, (10257), 2076 states have call successors, (2076), 564 states have call predecessors, (2076), 698 states have return successors, (3365), 2021 states have call predecessors, (3365), 2065 states have call successors, (3365) [2022-11-25 23:55:10,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9547 states to 9547 states and 15698 transitions. [2022-11-25 23:55:10,915 INFO L78 Accepts]: Start accepts. Automaton has 9547 states and 15698 transitions. Word has length 98 [2022-11-25 23:55:10,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:55:10,916 INFO L495 AbstractCegarLoop]: Abstraction has 9547 states and 15698 transitions. [2022-11-25 23:55:10,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 6.555555555555555) internal successors, (59), 9 states have internal predecessors, (59), 5 states have call successors, (19), 5 states have call predecessors, (19), 4 states have return successors, (17), 6 states have call predecessors, (17), 4 states have call successors, (17) [2022-11-25 23:55:10,916 INFO L276 IsEmpty]: Start isEmpty. Operand 9547 states and 15698 transitions. [2022-11-25 23:55:10,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-11-25 23:55:10,921 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:55:10,922 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:55:10,931 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e093516-3c0b-4816-94f4-7fd4d5705a71/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-25 23:55:11,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e093516-3c0b-4816-94f4-7fd4d5705a71/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-25 23:55:11,130 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:55:11,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:55:11,131 INFO L85 PathProgramCache]: Analyzing trace with hash 691853104, now seen corresponding path program 1 times [2022-11-25 23:55:11,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:55:11,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985098482] [2022-11-25 23:55:11,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:55:11,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:55:11,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:55:11,817 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-25 23:55:11,817 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:55:11,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985098482] [2022-11-25 23:55:11,817 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985098482] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:55:11,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119019310] [2022-11-25 23:55:11,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:55:11,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:55:11,818 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e093516-3c0b-4816-94f4-7fd4d5705a71/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:55:11,819 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e093516-3c0b-4816-94f4-7fd4d5705a71/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:55:11,843 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e093516-3c0b-4816-94f4-7fd4d5705a71/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-25 23:55:12,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:55:12,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 1855 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-25 23:55:12,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:55:12,327 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 23:55:12,327 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:55:12,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2119019310] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:55:12,328 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 23:55:12,328 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [10] total 12 [2022-11-25 23:55:12,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532282812] [2022-11-25 23:55:12,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:55:12,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 23:55:12,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:55:12,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 23:55:12,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2022-11-25 23:55:12,331 INFO L87 Difference]: Start difference. First operand 9547 states and 15698 transitions. Second operand has 4 states, 4 states have (on average 15.5) internal successors, (62), 3 states have internal predecessors, (62), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2022-11-25 23:55:13,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:55:13,430 INFO L93 Difference]: Finished difference Result 20726 states and 34228 transitions. [2022-11-25 23:55:13,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 23:55:13,431 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 3 states have internal predecessors, (62), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 101 [2022-11-25 23:55:13,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:55:13,498 INFO L225 Difference]: With dead ends: 20726 [2022-11-25 23:55:13,498 INFO L226 Difference]: Without dead ends: 11191 [2022-11-25 23:55:13,551 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2022-11-25 23:55:13,553 INFO L413 NwaCegarLoop]: 694 mSDtfsCounter, 423 mSDsluCounter, 1066 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 425 SdHoareTripleChecker+Valid, 1760 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 23:55:13,554 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [425 Valid, 1760 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 23:55:13,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11191 states. [2022-11-25 23:55:14,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11191 to 10919. [2022-11-25 23:55:14,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10919 states, 7728 states have (on average 1.4887422360248448) internal successors, (11505), 8079 states have internal predecessors, (11505), 2354 states have call successors, (2354), 684 states have call predecessors, (2354), 836 states have return successors, (3983), 2315 states have call predecessors, (3983), 2337 states have call successors, (3983) [2022-11-25 23:55:14,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10919 states to 10919 states and 17842 transitions. [2022-11-25 23:55:14,774 INFO L78 Accepts]: Start accepts. Automaton has 10919 states and 17842 transitions. Word has length 101 [2022-11-25 23:55:14,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:55:14,774 INFO L495 AbstractCegarLoop]: Abstraction has 10919 states and 17842 transitions. [2022-11-25 23:55:14,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 3 states have internal predecessors, (62), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2022-11-25 23:55:14,775 INFO L276 IsEmpty]: Start isEmpty. Operand 10919 states and 17842 transitions. [2022-11-25 23:55:14,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-11-25 23:55:14,780 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:55:14,781 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:55:14,795 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e093516-3c0b-4816-94f4-7fd4d5705a71/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-25 23:55:14,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e093516-3c0b-4816-94f4-7fd4d5705a71/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:55:14,990 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:55:14,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:55:14,991 INFO L85 PathProgramCache]: Analyzing trace with hash -1065512801, now seen corresponding path program 1 times [2022-11-25 23:55:14,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:55:14,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489842460] [2022-11-25 23:55:14,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:55:14,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:55:15,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:55:15,656 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-25 23:55:15,656 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:55:15,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489842460] [2022-11-25 23:55:15,657 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489842460] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:55:15,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868236459] [2022-11-25 23:55:15,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:55:15,657 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:55:15,658 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e093516-3c0b-4816-94f4-7fd4d5705a71/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:55:15,661 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e093516-3c0b-4816-94f4-7fd4d5705a71/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:55:15,683 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e093516-3c0b-4816-94f4-7fd4d5705a71/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-25 23:55:16,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:55:16,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 1856 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-25 23:55:16,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:55:16,254 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 23:55:16,254 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:55:16,624 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-25 23:55:16,624 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1868236459] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-25 23:55:16,625 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-25 23:55:16,625 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10, 7] total 17 [2022-11-25 23:55:16,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667031924] [2022-11-25 23:55:16,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:55:16,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 23:55:16,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:55:16,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 23:55:16,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2022-11-25 23:55:16,627 INFO L87 Difference]: Start difference. First operand 10919 states and 17842 transitions. Second operand has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 5 states have call successors, (20), 4 states have call predecessors, (20), 4 states have return successors, (18), 6 states have call predecessors, (18), 5 states have call successors, (18) [2022-11-25 23:55:19,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:55:19,515 INFO L93 Difference]: Finished difference Result 21469 states and 35624 transitions. [2022-11-25 23:55:19,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-25 23:55:19,516 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 5 states have call successors, (20), 4 states have call predecessors, (20), 4 states have return successors, (18), 6 states have call predecessors, (18), 5 states have call successors, (18) Word has length 102 [2022-11-25 23:55:19,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:55:19,591 INFO L225 Difference]: With dead ends: 21469 [2022-11-25 23:55:19,591 INFO L226 Difference]: Without dead ends: 12404 [2022-11-25 23:55:19,642 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 195 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2022-11-25 23:55:19,642 INFO L413 NwaCegarLoop]: 643 mSDtfsCounter, 1189 mSDsluCounter, 1447 mSDsCounter, 0 mSdLazyCounter, 1930 mSolverCounterSat, 250 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1285 SdHoareTripleChecker+Valid, 2090 SdHoareTripleChecker+Invalid, 2180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 250 IncrementalHoareTripleChecker+Valid, 1930 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-25 23:55:19,644 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1285 Valid, 2090 Invalid, 2180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [250 Valid, 1930 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-11-25 23:55:19,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12404 states. [2022-11-25 23:55:20,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12404 to 10907. [2022-11-25 23:55:20,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10907 states, 7728 states have (on average 1.4887422360248448) internal successors, (11505), 8067 states have internal predecessors, (11505), 2342 states have call successors, (2342), 684 states have call predecessors, (2342), 836 states have return successors, (3947), 2315 states have call predecessors, (3947), 2325 states have call successors, (3947) [2022-11-25 23:55:20,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10907 states to 10907 states and 17794 transitions. [2022-11-25 23:55:20,786 INFO L78 Accepts]: Start accepts. Automaton has 10907 states and 17794 transitions. Word has length 102 [2022-11-25 23:55:20,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:55:20,787 INFO L495 AbstractCegarLoop]: Abstraction has 10907 states and 17794 transitions. [2022-11-25 23:55:20,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 5 states have call successors, (20), 4 states have call predecessors, (20), 4 states have return successors, (18), 6 states have call predecessors, (18), 5 states have call successors, (18) [2022-11-25 23:55:20,787 INFO L276 IsEmpty]: Start isEmpty. Operand 10907 states and 17794 transitions. [2022-11-25 23:55:20,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-11-25 23:55:20,796 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:55:20,796 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2022-11-25 23:55:20,811 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e093516-3c0b-4816-94f4-7fd4d5705a71/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-25 23:55:21,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e093516-3c0b-4816-94f4-7fd4d5705a71/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:55:21,004 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:55:21,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:55:21,005 INFO L85 PathProgramCache]: Analyzing trace with hash 1410860881, now seen corresponding path program 1 times [2022-11-25 23:55:21,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:55:21,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94594938] [2022-11-25 23:55:21,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:55:21,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:55:21,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:55:21,681 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-25 23:55:21,681 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:55:21,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94594938] [2022-11-25 23:55:21,682 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94594938] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:55:21,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5481359] [2022-11-25 23:55:21,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:55:21,682 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:55:21,682 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e093516-3c0b-4816-94f4-7fd4d5705a71/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:55:21,683 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e093516-3c0b-4816-94f4-7fd4d5705a71/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:55:21,707 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e093516-3c0b-4816-94f4-7fd4d5705a71/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-25 23:55:22,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:55:22,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 1964 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-25 23:55:22,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:55:22,181 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-25 23:55:22,181 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:55:22,182 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [5481359] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:55:22,182 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 23:55:22,182 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10] total 15 [2022-11-25 23:55:22,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823770479] [2022-11-25 23:55:22,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:55:22,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 23:55:22,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:55:22,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 23:55:22,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2022-11-25 23:55:22,185 INFO L87 Difference]: Start difference. First operand 10907 states and 17794 transitions. Second operand has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 5 states have internal predecessors, (78), 2 states have call successors, (25), 2 states have call predecessors, (25), 4 states have return successors, (23), 4 states have call predecessors, (23), 2 states have call successors, (23) [2022-11-25 23:55:23,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:55:23,429 INFO L93 Difference]: Finished difference Result 21001 states and 35495 transitions. [2022-11-25 23:55:23,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 23:55:23,430 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 5 states have internal predecessors, (78), 2 states have call successors, (25), 2 states have call predecessors, (25), 4 states have return successors, (23), 4 states have call predecessors, (23), 2 states have call successors, (23) Word has length 130 [2022-11-25 23:55:23,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:55:23,508 INFO L225 Difference]: With dead ends: 21001 [2022-11-25 23:55:23,508 INFO L226 Difference]: Without dead ends: 11363 [2022-11-25 23:55:23,590 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2022-11-25 23:55:23,590 INFO L413 NwaCegarLoop]: 609 mSDtfsCounter, 2 mSDsluCounter, 3005 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 3614 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 23:55:23,591 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 3614 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 23:55:23,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11363 states. [2022-11-25 23:55:24,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11363 to 11237. [2022-11-25 23:55:24,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11237 states, 7950 states have (on average 1.4750943396226415) internal successors, (11727), 8313 states have internal predecessors, (11727), 2342 states have call successors, (2342), 684 states have call predecessors, (2342), 944 states have return successors, (4631), 2399 states have call predecessors, (4631), 2325 states have call successors, (4631) [2022-11-25 23:55:24,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11237 states to 11237 states and 18700 transitions. [2022-11-25 23:55:24,565 INFO L78 Accepts]: Start accepts. Automaton has 11237 states and 18700 transitions. Word has length 130 [2022-11-25 23:55:24,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:55:24,566 INFO L495 AbstractCegarLoop]: Abstraction has 11237 states and 18700 transitions. [2022-11-25 23:55:24,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 5 states have internal predecessors, (78), 2 states have call successors, (25), 2 states have call predecessors, (25), 4 states have return successors, (23), 4 states have call predecessors, (23), 2 states have call successors, (23) [2022-11-25 23:55:24,566 INFO L276 IsEmpty]: Start isEmpty. Operand 11237 states and 18700 transitions. [2022-11-25 23:55:24,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-11-25 23:55:24,574 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:55:24,574 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:55:24,584 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e093516-3c0b-4816-94f4-7fd4d5705a71/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-25 23:55:24,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e093516-3c0b-4816-94f4-7fd4d5705a71/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:55:24,783 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:55:24,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:55:24,784 INFO L85 PathProgramCache]: Analyzing trace with hash -985566167, now seen corresponding path program 1 times [2022-11-25 23:55:24,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:55:24,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367646099] [2022-11-25 23:55:24,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:55:24,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:55:24,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:55:25,391 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-25 23:55:25,391 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:55:25,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367646099] [2022-11-25 23:55:25,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367646099] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:55:25,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483103274] [2022-11-25 23:55:25,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:55:25,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:55:25,392 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e093516-3c0b-4816-94f4-7fd4d5705a71/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:55:25,393 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e093516-3c0b-4816-94f4-7fd4d5705a71/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:55:25,415 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e093516-3c0b-4816-94f4-7fd4d5705a71/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-25 23:55:25,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:55:25,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 1966 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-25 23:55:25,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:55:25,921 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-25 23:55:25,922 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:55:25,922 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1483103274] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:55:25,922 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 23:55:25,922 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10] total 15 [2022-11-25 23:55:25,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453358343] [2022-11-25 23:55:25,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:55:25,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 23:55:25,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:55:25,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 23:55:25,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2022-11-25 23:55:25,925 INFO L87 Difference]: Start difference. First operand 11237 states and 18700 transitions. Second operand has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 5 states have internal predecessors, (75), 2 states have call successors, (25), 2 states have call predecessors, (25), 4 states have return successors, (23), 4 states have call predecessors, (23), 2 states have call successors, (23) [2022-11-25 23:55:26,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:55:26,853 INFO L93 Difference]: Finished difference Result 21541 states and 36855 transitions. [2022-11-25 23:55:26,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 23:55:26,853 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 5 states have internal predecessors, (75), 2 states have call successors, (25), 2 states have call predecessors, (25), 4 states have return successors, (23), 4 states have call predecessors, (23), 2 states have call successors, (23) Word has length 128 [2022-11-25 23:55:26,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:55:26,930 INFO L225 Difference]: With dead ends: 21541 [2022-11-25 23:55:26,931 INFO L226 Difference]: Without dead ends: 11585 [2022-11-25 23:55:26,992 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2022-11-25 23:55:26,992 INFO L413 NwaCegarLoop]: 605 mSDtfsCounter, 2 mSDsluCounter, 2989 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 3594 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 23:55:26,993 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 3594 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 23:55:27,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11585 states. [2022-11-25 23:55:27,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11585 to 11291. [2022-11-25 23:55:27,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11291 states, 8004 states have (on average 1.471889055472264) internal successors, (11781), 8313 states have internal predecessors, (11781), 2342 states have call successors, (2342), 684 states have call predecessors, (2342), 944 states have return successors, (4631), 2453 states have call predecessors, (4631), 2325 states have call successors, (4631) [2022-11-25 23:55:27,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11291 states to 11291 states and 18754 transitions. [2022-11-25 23:55:27,971 INFO L78 Accepts]: Start accepts. Automaton has 11291 states and 18754 transitions. Word has length 128 [2022-11-25 23:55:27,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:55:27,973 INFO L495 AbstractCegarLoop]: Abstraction has 11291 states and 18754 transitions. [2022-11-25 23:55:27,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 5 states have internal predecessors, (75), 2 states have call successors, (25), 2 states have call predecessors, (25), 4 states have return successors, (23), 4 states have call predecessors, (23), 2 states have call successors, (23) [2022-11-25 23:55:27,974 INFO L276 IsEmpty]: Start isEmpty. Operand 11291 states and 18754 transitions. [2022-11-25 23:55:27,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-11-25 23:55:27,980 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:55:27,980 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:55:27,989 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e093516-3c0b-4816-94f4-7fd4d5705a71/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-25 23:55:28,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e093516-3c0b-4816-94f4-7fd4d5705a71/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-25 23:55:28,189 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:55:28,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:55:28,189 INFO L85 PathProgramCache]: Analyzing trace with hash -1192331673, now seen corresponding path program 1 times [2022-11-25 23:55:28,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:55:28,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820703820] [2022-11-25 23:55:28,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:55:28,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:55:28,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:55:28,921 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-25 23:55:28,921 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:55:28,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820703820] [2022-11-25 23:55:28,921 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820703820] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:55:28,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568915517] [2022-11-25 23:55:28,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:55:28,922 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:55:28,922 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e093516-3c0b-4816-94f4-7fd4d5705a71/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:55:28,923 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e093516-3c0b-4816-94f4-7fd4d5705a71/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:55:28,931 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e093516-3c0b-4816-94f4-7fd4d5705a71/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-25 23:55:29,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:55:29,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 1965 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-25 23:55:29,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:55:29,452 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-25 23:55:29,453 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:55:29,453 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [568915517] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:55:29,453 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 23:55:29,453 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10] total 15 [2022-11-25 23:55:29,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074982489] [2022-11-25 23:55:29,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:55:29,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 23:55:29,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:55:29,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 23:55:29,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2022-11-25 23:55:29,456 INFO L87 Difference]: Start difference. First operand 11291 states and 18754 transitions. Second operand has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 5 states have internal predecessors, (75), 2 states have call successors, (25), 2 states have call predecessors, (25), 4 states have return successors, (23), 4 states have call predecessors, (23), 2 states have call successors, (23) [2022-11-25 23:55:30,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:55:30,259 INFO L93 Difference]: Finished difference Result 21649 states and 36963 transitions. [2022-11-25 23:55:30,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 23:55:30,260 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 5 states have internal predecessors, (75), 2 states have call successors, (25), 2 states have call predecessors, (25), 4 states have return successors, (23), 4 states have call predecessors, (23), 2 states have call successors, (23) Word has length 128 [2022-11-25 23:55:30,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:55:30,343 INFO L225 Difference]: With dead ends: 21649 [2022-11-25 23:55:30,344 INFO L226 Difference]: Without dead ends: 11639 [2022-11-25 23:55:30,413 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2022-11-25 23:55:30,414 INFO L413 NwaCegarLoop]: 609 mSDtfsCounter, 2 mSDsluCounter, 3005 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 3614 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 23:55:30,414 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 3614 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 23:55:30,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11639 states. [2022-11-25 23:55:31,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11639 to 11345. [2022-11-25 23:55:31,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11345 states, 8058 states have (on average 1.4687267311988086) internal successors, (11835), 8313 states have internal predecessors, (11835), 2342 states have call successors, (2342), 684 states have call predecessors, (2342), 944 states have return successors, (4631), 2507 states have call predecessors, (4631), 2325 states have call successors, (4631) [2022-11-25 23:55:31,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11345 states to 11345 states and 18808 transitions. [2022-11-25 23:55:31,950 INFO L78 Accepts]: Start accepts. Automaton has 11345 states and 18808 transitions. Word has length 128 [2022-11-25 23:55:31,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:55:31,955 INFO L495 AbstractCegarLoop]: Abstraction has 11345 states and 18808 transitions. [2022-11-25 23:55:31,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 5 states have internal predecessors, (75), 2 states have call successors, (25), 2 states have call predecessors, (25), 4 states have return successors, (23), 4 states have call predecessors, (23), 2 states have call successors, (23) [2022-11-25 23:55:31,955 INFO L276 IsEmpty]: Start isEmpty. Operand 11345 states and 18808 transitions. [2022-11-25 23:55:31,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2022-11-25 23:55:31,967 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:55:31,967 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:55:31,976 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e093516-3c0b-4816-94f4-7fd4d5705a71/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-25 23:55:32,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e093516-3c0b-4816-94f4-7fd4d5705a71/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-25 23:55:32,176 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:55:32,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:55:32,176 INFO L85 PathProgramCache]: Analyzing trace with hash 610099067, now seen corresponding path program 1 times [2022-11-25 23:55:32,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:55:32,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229341771] [2022-11-25 23:55:32,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:55:32,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:55:32,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:55:32,965 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-11-25 23:55:32,965 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:55:32,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229341771] [2022-11-25 23:55:32,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229341771] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:55:32,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110283841] [2022-11-25 23:55:32,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:55:32,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:55:32,966 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e093516-3c0b-4816-94f4-7fd4d5705a71/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:55:32,967 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e093516-3c0b-4816-94f4-7fd4d5705a71/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:55:32,969 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e093516-3c0b-4816-94f4-7fd4d5705a71/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-25 23:55:33,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:55:33,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 1976 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-25 23:55:33,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:55:33,471 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-25 23:55:33,471 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:55:33,471 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [110283841] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:55:33,471 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 23:55:33,472 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 14 [2022-11-25 23:55:33,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337395299] [2022-11-25 23:55:33,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:55:33,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 23:55:33,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:55:33,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 23:55:33,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2022-11-25 23:55:33,474 INFO L87 Difference]: Start difference. First operand 11345 states and 18808 transitions. Second operand has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 3 states have call successors, (23), 2 states have call predecessors, (23), 4 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) [2022-11-25 23:55:34,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:55:34,577 INFO L93 Difference]: Finished difference Result 23541 states and 40497 transitions. [2022-11-25 23:55:34,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 23:55:34,577 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 3 states have call successors, (23), 2 states have call predecessors, (23), 4 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) Word has length 152 [2022-11-25 23:55:34,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:55:34,655 INFO L225 Difference]: With dead ends: 23541 [2022-11-25 23:55:34,655 INFO L226 Difference]: Without dead ends: 11072 [2022-11-25 23:55:34,732 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2022-11-25 23:55:34,733 INFO L413 NwaCegarLoop]: 640 mSDtfsCounter, 250 mSDsluCounter, 2284 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 2924 SdHoareTripleChecker+Invalid, 349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 23:55:34,733 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [264 Valid, 2924 Invalid, 349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 323 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 23:55:34,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11072 states. [2022-11-25 23:55:35,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11072 to 11052. [2022-11-25 23:55:35,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11052 states, 7831 states have (on average 1.444387689950198) internal successors, (11311), 8088 states have internal predecessors, (11311), 2298 states have call successors, (2298), 678 states have call predecessors, (2298), 922 states have return successors, (4482), 2445 states have call predecessors, (4482), 2281 states have call successors, (4482) [2022-11-25 23:55:35,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11052 states to 11052 states and 18091 transitions. [2022-11-25 23:55:35,614 INFO L78 Accepts]: Start accepts. Automaton has 11052 states and 18091 transitions. Word has length 152 [2022-11-25 23:55:35,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:55:35,614 INFO L495 AbstractCegarLoop]: Abstraction has 11052 states and 18091 transitions. [2022-11-25 23:55:35,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 3 states have call successors, (23), 2 states have call predecessors, (23), 4 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) [2022-11-25 23:55:35,615 INFO L276 IsEmpty]: Start isEmpty. Operand 11052 states and 18091 transitions. [2022-11-25 23:55:35,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-11-25 23:55:35,623 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:55:35,623 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:55:35,632 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e093516-3c0b-4816-94f4-7fd4d5705a71/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-25 23:55:35,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e093516-3c0b-4816-94f4-7fd4d5705a71/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:55:35,831 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:55:35,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:55:35,832 INFO L85 PathProgramCache]: Analyzing trace with hash -1773552761, now seen corresponding path program 1 times [2022-11-25 23:55:35,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:55:35,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198694322] [2022-11-25 23:55:35,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:55:35,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:55:35,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:55:36,439 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-25 23:55:36,439 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:55:36,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198694322] [2022-11-25 23:55:36,439 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198694322] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:55:36,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968551094] [2022-11-25 23:55:36,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:55:36,440 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:55:36,440 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e093516-3c0b-4816-94f4-7fd4d5705a71/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:55:36,441 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e093516-3c0b-4816-94f4-7fd4d5705a71/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:55:36,451 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e093516-3c0b-4816-94f4-7fd4d5705a71/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-25 23:55:36,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:55:36,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 1974 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-25 23:55:36,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:55:37,015 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-25 23:55:37,015 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:55:37,015 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1968551094] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:55:37,016 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 23:55:37,016 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 14 [2022-11-25 23:55:37,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078820195] [2022-11-25 23:55:37,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:55:37,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 23:55:37,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:55:37,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 23:55:37,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2022-11-25 23:55:37,018 INFO L87 Difference]: Start difference. First operand 11052 states and 18091 transitions. Second operand has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 3 states have call successors, (24), 2 states have call predecessors, (24), 4 states have return successors, (22), 3 states have call predecessors, (22), 3 states have call successors, (22) [2022-11-25 23:55:38,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:55:38,002 INFO L93 Difference]: Finished difference Result 23842 states and 40130 transitions. [2022-11-25 23:55:38,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 23:55:38,002 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 3 states have call successors, (24), 2 states have call predecessors, (24), 4 states have return successors, (22), 3 states have call predecessors, (22), 3 states have call successors, (22) Word has length 145 [2022-11-25 23:55:38,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:55:38,103 INFO L225 Difference]: With dead ends: 23842 [2022-11-25 23:55:38,103 INFO L226 Difference]: Without dead ends: 13677 [2022-11-25 23:55:38,178 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2022-11-25 23:55:38,178 INFO L413 NwaCegarLoop]: 601 mSDtfsCounter, 319 mSDsluCounter, 2192 mSDsCounter, 0 mSdLazyCounter, 325 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 333 SdHoareTripleChecker+Valid, 2793 SdHoareTripleChecker+Invalid, 359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-25 23:55:38,179 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [333 Valid, 2793 Invalid, 359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 325 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-25 23:55:38,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13677 states. [2022-11-25 23:55:39,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13677 to 13677. [2022-11-25 23:55:39,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13677 states, 10053 states have (on average 1.4727941907888193) internal successors, (14806), 10391 states have internal predecessors, (14806), 2578 states have call successors, (2578), 720 states have call predecessors, (2578), 1045 states have return successors, (4762), 2725 states have call predecessors, (4762), 2561 states have call successors, (4762) [2022-11-25 23:55:39,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13677 states to 13677 states and 22146 transitions. [2022-11-25 23:55:39,217 INFO L78 Accepts]: Start accepts. Automaton has 13677 states and 22146 transitions. Word has length 145 [2022-11-25 23:55:39,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:55:39,218 INFO L495 AbstractCegarLoop]: Abstraction has 13677 states and 22146 transitions. [2022-11-25 23:55:39,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 3 states have call successors, (24), 2 states have call predecessors, (24), 4 states have return successors, (22), 3 states have call predecessors, (22), 3 states have call successors, (22) [2022-11-25 23:55:39,218 INFO L276 IsEmpty]: Start isEmpty. Operand 13677 states and 22146 transitions. [2022-11-25 23:55:39,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-11-25 23:55:39,229 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:55:39,229 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:55:39,239 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e093516-3c0b-4816-94f4-7fd4d5705a71/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-25 23:55:39,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e093516-3c0b-4816-94f4-7fd4d5705a71/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-25 23:55:39,438 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:55:39,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:55:39,439 INFO L85 PathProgramCache]: Analyzing trace with hash 1625937931, now seen corresponding path program 1 times [2022-11-25 23:55:39,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:55:39,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935081577] [2022-11-25 23:55:39,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:55:39,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:55:39,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:55:40,020 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-25 23:55:40,021 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:55:40,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935081577] [2022-11-25 23:55:40,021 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935081577] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:55:40,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875867680] [2022-11-25 23:55:40,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:55:40,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:55:40,022 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e093516-3c0b-4816-94f4-7fd4d5705a71/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:55:40,023 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e093516-3c0b-4816-94f4-7fd4d5705a71/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:55:40,051 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e093516-3c0b-4816-94f4-7fd4d5705a71/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-25 23:55:40,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:55:40,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 1974 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-25 23:55:40,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:55:40,641 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-25 23:55:40,641 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:55:40,642 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [875867680] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:55:40,642 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 23:55:40,642 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 11 [2022-11-25 23:55:40,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245785411] [2022-11-25 23:55:40,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:55:40,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 23:55:40,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:55:40,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 23:55:40,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2022-11-25 23:55:40,644 INFO L87 Difference]: Start difference. First operand 13677 states and 22146 transitions. Second operand has 6 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 3 states have call successors, (24), 3 states have call predecessors, (24), 3 states have return successors, (22), 3 states have call predecessors, (22), 3 states have call successors, (22) [2022-11-25 23:55:43,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:55:43,208 INFO L93 Difference]: Finished difference Result 36088 states and 62057 transitions. [2022-11-25 23:55:43,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 23:55:43,208 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 3 states have call successors, (24), 3 states have call predecessors, (24), 3 states have return successors, (22), 3 states have call predecessors, (22), 3 states have call successors, (22) Word has length 146 [2022-11-25 23:55:43,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:55:43,384 INFO L225 Difference]: With dead ends: 36088 [2022-11-25 23:55:43,384 INFO L226 Difference]: Without dead ends: 22343 [2022-11-25 23:55:43,523 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-11-25 23:55:43,525 INFO L413 NwaCegarLoop]: 774 mSDtfsCounter, 629 mSDsluCounter, 2494 mSDsCounter, 0 mSdLazyCounter, 519 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 648 SdHoareTripleChecker+Valid, 3268 SdHoareTripleChecker+Invalid, 542 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 519 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-25 23:55:43,526 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [648 Valid, 3268 Invalid, 542 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 519 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-25 23:55:43,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22343 states. [2022-11-25 23:55:45,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22343 to 21026. [2022-11-25 23:55:45,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21026 states, 15450 states have (on average 1.4659546925566342) internal successors, (22649), 16015 states have internal predecessors, (22649), 3932 states have call successors, (3932), 1133 states have call predecessors, (3932), 1643 states have return successors, (8398), 4136 states have call predecessors, (8398), 3910 states have call successors, (8398) [2022-11-25 23:55:45,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21026 states to 21026 states and 34979 transitions. [2022-11-25 23:55:45,657 INFO L78 Accepts]: Start accepts. Automaton has 21026 states and 34979 transitions. Word has length 146 [2022-11-25 23:55:45,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:55:45,657 INFO L495 AbstractCegarLoop]: Abstraction has 21026 states and 34979 transitions. [2022-11-25 23:55:45,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 3 states have call successors, (24), 3 states have call predecessors, (24), 3 states have return successors, (22), 3 states have call predecessors, (22), 3 states have call successors, (22) [2022-11-25 23:55:45,658 INFO L276 IsEmpty]: Start isEmpty. Operand 21026 states and 34979 transitions. [2022-11-25 23:55:45,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-11-25 23:55:45,669 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:55:45,669 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:55:45,683 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e093516-3c0b-4816-94f4-7fd4d5705a71/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-25 23:55:45,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e093516-3c0b-4816-94f4-7fd4d5705a71/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-25 23:55:45,879 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:55:45,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:55:45,880 INFO L85 PathProgramCache]: Analyzing trace with hash -1235573061, now seen corresponding path program 1 times [2022-11-25 23:55:45,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:55:45,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905761445] [2022-11-25 23:55:45,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:55:45,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:55:45,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:55:46,918 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-25 23:55:46,918 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:55:46,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905761445] [2022-11-25 23:55:46,919 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905761445] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:55:46,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541576343] [2022-11-25 23:55:46,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:55:46,919 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:55:46,919 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e093516-3c0b-4816-94f4-7fd4d5705a71/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:55:46,920 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e093516-3c0b-4816-94f4-7fd4d5705a71/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:55:46,928 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e093516-3c0b-4816-94f4-7fd4d5705a71/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-25 23:55:47,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:55:47,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 1991 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-25 23:55:47,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:55:47,697 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-25 23:55:47,697 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:55:47,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1541576343] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:55:47,697 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 23:55:47,698 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 11 [2022-11-25 23:55:47,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196797542] [2022-11-25 23:55:47,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:55:47,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 23:55:47,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:55:47,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 23:55:47,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2022-11-25 23:55:47,700 INFO L87 Difference]: Start difference. First operand 21026 states and 34979 transitions. Second operand has 6 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 3 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) [2022-11-25 23:55:50,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:55:50,314 INFO L93 Difference]: Finished difference Result 48190 states and 81381 transitions. [2022-11-25 23:55:50,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 23:55:50,314 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 3 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) Word has length 149 [2022-11-25 23:55:50,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:55:50,482 INFO L225 Difference]: With dead ends: 48190 [2022-11-25 23:55:50,482 INFO L226 Difference]: Without dead ends: 27176 [2022-11-25 23:55:50,603 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2022-11-25 23:55:50,603 INFO L413 NwaCegarLoop]: 773 mSDtfsCounter, 583 mSDsluCounter, 2691 mSDsCounter, 0 mSdLazyCounter, 542 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 598 SdHoareTripleChecker+Valid, 3464 SdHoareTripleChecker+Invalid, 558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 542 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-25 23:55:50,604 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [598 Valid, 3464 Invalid, 558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 542 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-25 23:55:50,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27176 states. [2022-11-25 23:55:52,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27176 to 25768. [2022-11-25 23:55:52,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25768 states, 18963 states have (on average 1.4587354321573591) internal successors, (27662), 19671 states have internal predecessors, (27662), 4808 states have call successors, (4808), 1369 states have call predecessors, (4808), 1996 states have return successors, (9852), 5043 states have call predecessors, (9852), 4782 states have call successors, (9852) [2022-11-25 23:55:52,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25768 states to 25768 states and 42322 transitions. [2022-11-25 23:55:53,011 INFO L78 Accepts]: Start accepts. Automaton has 25768 states and 42322 transitions. Word has length 149 [2022-11-25 23:55:53,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:55:53,012 INFO L495 AbstractCegarLoop]: Abstraction has 25768 states and 42322 transitions. [2022-11-25 23:55:53,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 3 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) [2022-11-25 23:55:53,012 INFO L276 IsEmpty]: Start isEmpty. Operand 25768 states and 42322 transitions. [2022-11-25 23:55:53,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2022-11-25 23:55:53,027 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:55:53,028 INFO L195 NwaCegarLoop]: trace histogram [5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:55:53,044 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e093516-3c0b-4816-94f4-7fd4d5705a71/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-25 23:55:53,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e093516-3c0b-4816-94f4-7fd4d5705a71/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-25 23:55:53,244 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:55:53,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:55:53,244 INFO L85 PathProgramCache]: Analyzing trace with hash -1762280347, now seen corresponding path program 1 times [2022-11-25 23:55:53,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:55:53,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418640006] [2022-11-25 23:55:53,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:55:53,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:55:53,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:55:54,426 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-11-25 23:55:54,426 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:55:54,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418640006] [2022-11-25 23:55:54,427 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418640006] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:55:54,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068149626] [2022-11-25 23:55:54,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:55:54,427 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:55:54,427 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e093516-3c0b-4816-94f4-7fd4d5705a71/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:55:54,430 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e093516-3c0b-4816-94f4-7fd4d5705a71/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:55:54,431 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e093516-3c0b-4816-94f4-7fd4d5705a71/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-25 23:55:54,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:55:54,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 2006 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-25 23:55:54,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:55:55,283 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-25 23:55:55,283 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:55:55,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2068149626] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:55:55,283 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 23:55:55,283 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 11 [2022-11-25 23:55:55,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169473371] [2022-11-25 23:55:55,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:55:55,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 23:55:55,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:55:55,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 23:55:55,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2022-11-25 23:55:55,286 INFO L87 Difference]: Start difference. First operand 25768 states and 42322 transitions. Second operand has 6 states, 5 states have (on average 19.6) internal successors, (98), 5 states have internal predecessors, (98), 3 states have call successors, (26), 3 states have call predecessors, (26), 3 states have return successors, (24), 3 states have call predecessors, (24), 3 states have call successors, (24) [2022-11-25 23:55:58,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:55:58,024 INFO L93 Difference]: Finished difference Result 52036 states and 87252 transitions. [2022-11-25 23:55:58,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 23:55:58,025 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 19.6) internal successors, (98), 5 states have internal predecessors, (98), 3 states have call successors, (26), 3 states have call predecessors, (26), 3 states have return successors, (24), 3 states have call predecessors, (24), 3 states have call successors, (24) Word has length 158 [2022-11-25 23:55:58,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:55:58,216 INFO L225 Difference]: With dead ends: 52036 [2022-11-25 23:55:58,216 INFO L226 Difference]: Without dead ends: 26280 [2022-11-25 23:55:58,389 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2022-11-25 23:55:58,390 INFO L413 NwaCegarLoop]: 762 mSDtfsCounter, 565 mSDsluCounter, 2656 mSDsCounter, 0 mSdLazyCounter, 552 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 578 SdHoareTripleChecker+Valid, 3418 SdHoareTripleChecker+Invalid, 566 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 552 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-25 23:55:58,390 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [578 Valid, 3418 Invalid, 566 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 552 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-25 23:55:58,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26280 states. [2022-11-25 23:56:00,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26280 to 24840. [2022-11-25 23:56:00,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24840 states, 18301 states have (on average 1.458007759138845) internal successors, (26683), 18980 states have internal predecessors, (26683), 4640 states have call successors, (4640), 1328 states have call predecessors, (4640), 1898 states have return successors, (9411), 4839 states have call predecessors, (9411), 4614 states have call successors, (9411) [2022-11-25 23:56:00,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24840 states to 24840 states and 40734 transitions. [2022-11-25 23:56:00,680 INFO L78 Accepts]: Start accepts. Automaton has 24840 states and 40734 transitions. Word has length 158 [2022-11-25 23:56:00,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:56:00,680 INFO L495 AbstractCegarLoop]: Abstraction has 24840 states and 40734 transitions. [2022-11-25 23:56:00,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 19.6) internal successors, (98), 5 states have internal predecessors, (98), 3 states have call successors, (26), 3 states have call predecessors, (26), 3 states have return successors, (24), 3 states have call predecessors, (24), 3 states have call successors, (24) [2022-11-25 23:56:00,681 INFO L276 IsEmpty]: Start isEmpty. Operand 24840 states and 40734 transitions. [2022-11-25 23:56:00,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2022-11-25 23:56:00,687 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:56:00,687 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-25 23:56:00,699 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e093516-3c0b-4816-94f4-7fd4d5705a71/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-25 23:56:00,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e093516-3c0b-4816-94f4-7fd4d5705a71/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-25 23:56:00,899 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:56:00,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:56:00,899 INFO L85 PathProgramCache]: Analyzing trace with hash 134216374, now seen corresponding path program 1 times [2022-11-25 23:56:00,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:56:00,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106677427] [2022-11-25 23:56:00,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:56:00,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:56:00,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:56:01,159 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-11-25 23:56:01,160 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:56:01,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106677427] [2022-11-25 23:56:01,160 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106677427] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:56:01,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785318860] [2022-11-25 23:56:01,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:56:01,160 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:56:01,161 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e093516-3c0b-4816-94f4-7fd4d5705a71/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:56:01,162 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e093516-3c0b-4816-94f4-7fd4d5705a71/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:56:01,183 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e093516-3c0b-4816-94f4-7fd4d5705a71/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-25 23:56:01,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:56:01,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 2418 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-25 23:56:01,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:56:01,755 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-25 23:56:01,755 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:56:01,756 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [785318860] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:56:01,756 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 23:56:01,756 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 14 [2022-11-25 23:56:01,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227823451] [2022-11-25 23:56:01,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:56:01,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-25 23:56:01,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:56:01,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-25 23:56:01,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2022-11-25 23:56:01,760 INFO L87 Difference]: Start difference. First operand 24840 states and 40734 transitions. Second operand has 8 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 5 states have call successors, (27), 4 states have call predecessors, (27), 5 states have return successors, (25), 6 states have call predecessors, (25), 5 states have call successors, (25) [2022-11-25 23:56:06,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:56:06,563 INFO L93 Difference]: Finished difference Result 53519 states and 89064 transitions. [2022-11-25 23:56:06,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-25 23:56:06,564 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 5 states have call successors, (27), 4 states have call predecessors, (27), 5 states have return successors, (25), 6 states have call predecessors, (25), 5 states have call successors, (25) Word has length 150 [2022-11-25 23:56:06,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:56:06,705 INFO L225 Difference]: With dead ends: 53519 [2022-11-25 23:56:06,705 INFO L226 Difference]: Without dead ends: 28581 [2022-11-25 23:56:06,955 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2022-11-25 23:56:06,955 INFO L413 NwaCegarLoop]: 362 mSDtfsCounter, 1211 mSDsluCounter, 1077 mSDsCounter, 0 mSdLazyCounter, 3372 mSolverCounterSat, 501 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1299 SdHoareTripleChecker+Valid, 1439 SdHoareTripleChecker+Invalid, 3873 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 501 IncrementalHoareTripleChecker+Valid, 3372 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-11-25 23:56:06,956 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1299 Valid, 1439 Invalid, 3873 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [501 Valid, 3372 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-11-25 23:56:06,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28581 states. [2022-11-25 23:56:08,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28581 to 24815. [2022-11-25 23:56:08,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24815 states, 18276 states have (on average 1.4583606916174217) internal successors, (26653), 18955 states have internal predecessors, (26653), 4640 states have call successors, (4640), 1328 states have call predecessors, (4640), 1898 states have return successors, (9411), 4839 states have call predecessors, (9411), 4614 states have call successors, (9411) [2022-11-25 23:56:08,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24815 states to 24815 states and 40704 transitions. [2022-11-25 23:56:09,005 INFO L78 Accepts]: Start accepts. Automaton has 24815 states and 40704 transitions. Word has length 150 [2022-11-25 23:56:09,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:56:09,005 INFO L495 AbstractCegarLoop]: Abstraction has 24815 states and 40704 transitions. [2022-11-25 23:56:09,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 5 states have call successors, (27), 4 states have call predecessors, (27), 5 states have return successors, (25), 6 states have call predecessors, (25), 5 states have call successors, (25) [2022-11-25 23:56:09,006 INFO L276 IsEmpty]: Start isEmpty. Operand 24815 states and 40704 transitions. [2022-11-25 23:56:09,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2022-11-25 23:56:09,014 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:56:09,014 INFO L195 NwaCegarLoop]: trace histogram [7, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:56:09,028 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e093516-3c0b-4816-94f4-7fd4d5705a71/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-25 23:56:09,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e093516-3c0b-4816-94f4-7fd4d5705a71/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:56:09,223 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:56:09,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:56:09,223 INFO L85 PathProgramCache]: Analyzing trace with hash -1540836639, now seen corresponding path program 1 times [2022-11-25 23:56:09,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:56:09,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919414783] [2022-11-25 23:56:09,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:56:09,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:56:09,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:56:10,443 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 13 proven. 19 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-11-25 23:56:10,443 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:56:10,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919414783] [2022-11-25 23:56:10,444 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919414783] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:56:10,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232354230] [2022-11-25 23:56:10,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:56:10,444 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:56:10,444 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e093516-3c0b-4816-94f4-7fd4d5705a71/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:56:10,445 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e093516-3c0b-4816-94f4-7fd4d5705a71/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:56:10,448 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e093516-3c0b-4816-94f4-7fd4d5705a71/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-25 23:56:10,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:56:10,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 2476 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-25 23:56:10,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:56:11,235 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 46 proven. 3 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2022-11-25 23:56:11,236 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:56:11,672 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 32 proven. 1 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-11-25 23:56:11,672 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1232354230] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:56:11,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1197398055] [2022-11-25 23:56:11,706 INFO L159 IcfgInterpreter]: Started Sifa with 107 locations of interest [2022-11-25 23:56:11,707 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:56:11,711 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:56:11,716 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:56:11,717 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:56:19,965 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 679 for LOIs [2022-11-25 23:56:27,567 INFO L197 IcfgInterpreter]: Interpreting procedure __automaton_fail with input of size 25 for LOIs [2022-11-25 23:56:27,572 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift__wrappee__twothirdsfull with input of size 199 for LOIs [2022-11-25 23:56:30,088 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection with input of size 55 for LOIs [2022-11-25 23:56:30,595 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection__wrappee__weight with input of size 69 for LOIs [2022-11-25 23:56:30,739 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 66 for LOIs [2022-11-25 23:56:30,752 INFO L197 IcfgInterpreter]: Interpreting procedure buttonForFloorIsPressed with input of size 54 for LOIs [2022-11-25 23:56:30,773 INFO L197 IcfgInterpreter]: Interpreting procedure initTopDown with input of size 605 for LOIs [2022-11-25 23:56:32,884 INFO L197 IcfgInterpreter]: Interpreting procedure initFloors with input of size 579 for LOIs [2022-11-25 23:56:33,075 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 42 for LOIs [2022-11-25 23:56:33,080 INFO L197 IcfgInterpreter]: Interpreting procedure continueInDirection with input of size 69 for LOIs [2022-11-25 23:56:33,109 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentHeading with input of size 42 for LOIs [2022-11-25 23:56:33,113 INFO L197 IcfgInterpreter]: Interpreting procedure bobCall with input of size 579 for LOIs [2022-11-25 23:56:36,426 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 583 for LOIs [2022-11-25 23:56:37,032 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 511 for LOIs [2022-11-25 23:56:37,171 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:56:59,950 WARN L233 SmtUtils]: Spent 5.32s on a formula simplification. DAG size of input: 519 DAG size of output: 516 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 23:57:08,796 WARN L233 SmtUtils]: Spent 5.46s on a formula simplification. DAG size of input: 551 DAG size of output: 518 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 23:57:17,583 WARN L233 SmtUtils]: Spent 8.21s on a formula simplification. DAG size of input: 651 DAG size of output: 598 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 23:57:26,200 WARN L233 SmtUtils]: Spent 8.16s on a formula simplification. DAG size of input: 651 DAG size of output: 598 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 23:57:37,213 WARN L233 SmtUtils]: Spent 6.43s on a formula simplification. DAG size of input: 778 DAG size of output: 600 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 23:57:53,788 WARN L233 SmtUtils]: Spent 8.35s on a formula simplification. DAG size of input: 679 DAG size of output: 566 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 23:58:40,963 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '851278#(and (= ~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 [2022-11-25 23:58:40,963 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:58:40,963 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 23:58:40,963 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 9, 9] total 29 [2022-11-25 23:58:40,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105924937] [2022-11-25 23:58:40,964 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 23:58:40,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-25 23:58:40,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:58:40,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-25 23:58:40,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=783, Invalid=12789, Unknown=0, NotChecked=0, Total=13572 [2022-11-25 23:58:40,972 INFO L87 Difference]: Start difference. First operand 24815 states and 40704 transitions. Second operand has 29 states, 21 states have (on average 7.9523809523809526) internal successors, (167), 25 states have internal predecessors, (167), 16 states have call successors, (58), 7 states have call predecessors, (58), 15 states have return successors, (59), 19 states have call predecessors, (59), 16 states have call successors, (59) [2022-11-25 23:59:07,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:59:07,826 INFO L93 Difference]: Finished difference Result 74505 states and 134002 transitions. [2022-11-25 23:59:07,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-11-25 23:59:07,827 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 21 states have (on average 7.9523809523809526) internal successors, (167), 25 states have internal predecessors, (167), 16 states have call successors, (58), 7 states have call predecessors, (58), 15 states have return successors, (59), 19 states have call predecessors, (59), 16 states have call successors, (59) Word has length 170 [2022-11-25 23:59:07,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:59:08,167 INFO L225 Difference]: With dead ends: 74505 [2022-11-25 23:59:08,168 INFO L226 Difference]: Without dead ends: 52016 [2022-11-25 23:59:08,469 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 615 GetRequests, 429 SyntacticMatches, 12 SemanticMatches, 174 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12368 ImplicationChecksByTransitivity, 127.5s TimeCoverageRelationStatistics Valid=2072, Invalid=28728, Unknown=0, NotChecked=0, Total=30800 [2022-11-25 23:59:08,469 INFO L413 NwaCegarLoop]: 619 mSDtfsCounter, 8664 mSDsluCounter, 6679 mSDsCounter, 0 mSdLazyCounter, 22153 mSolverCounterSat, 5423 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8664 SdHoareTripleChecker+Valid, 7298 SdHoareTripleChecker+Invalid, 27576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 5423 IncrementalHoareTripleChecker+Valid, 22153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.3s IncrementalHoareTripleChecker+Time [2022-11-25 23:59:08,470 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8664 Valid, 7298 Invalid, 27576 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [5423 Valid, 22153 Invalid, 0 Unknown, 0 Unchecked, 17.3s Time] [2022-11-25 23:59:08,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52016 states. [2022-11-25 23:59:13,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52016 to 44692. [2022-11-25 23:59:13,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44692 states, 31645 states have (on average 1.419718754937589) internal successors, (44927), 33382 states have internal predecessors, (44927), 9366 states have call successors, (9366), 2876 states have call predecessors, (9366), 3680 states have return successors, (17312), 9191 states have call predecessors, (17312), 9327 states have call successors, (17312) [2022-11-25 23:59:13,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44692 states to 44692 states and 71605 transitions. [2022-11-25 23:59:13,473 INFO L78 Accepts]: Start accepts. Automaton has 44692 states and 71605 transitions. Word has length 170 [2022-11-25 23:59:13,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:59:13,473 INFO L495 AbstractCegarLoop]: Abstraction has 44692 states and 71605 transitions. [2022-11-25 23:59:13,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 21 states have (on average 7.9523809523809526) internal successors, (167), 25 states have internal predecessors, (167), 16 states have call successors, (58), 7 states have call predecessors, (58), 15 states have return successors, (59), 19 states have call predecessors, (59), 16 states have call successors, (59) [2022-11-25 23:59:13,474 INFO L276 IsEmpty]: Start isEmpty. Operand 44692 states and 71605 transitions. [2022-11-25 23:59:13,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-25 23:59:13,485 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:59:13,486 INFO L195 NwaCegarLoop]: trace histogram [7, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:59:13,495 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e093516-3c0b-4816-94f4-7fd4d5705a71/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-25 23:59:13,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e093516-3c0b-4816-94f4-7fd4d5705a71/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:59:13,691 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:59:13,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:59:13,692 INFO L85 PathProgramCache]: Analyzing trace with hash -407550701, now seen corresponding path program 1 times [2022-11-25 23:59:13,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:59:13,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881903751] [2022-11-25 23:59:13,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:59:13,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:59:13,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:59:13,876 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-11-25 23:59:13,877 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:59:13,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881903751] [2022-11-25 23:59:13,877 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881903751] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:59:13,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929516885] [2022-11-25 23:59:13,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:59:13,878 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:59:13,878 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e093516-3c0b-4816-94f4-7fd4d5705a71/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:59:13,879 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e093516-3c0b-4816-94f4-7fd4d5705a71/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:59:13,895 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e093516-3c0b-4816-94f4-7fd4d5705a71/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-25 23:59:14,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:59:14,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 2501 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-25 23:59:14,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:59:14,464 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-11-25 23:59:14,464 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:59:14,465 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1929516885] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:59:14,465 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 23:59:14,465 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2022-11-25 23:59:14,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714313464] [2022-11-25 23:59:14,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:59:14,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 23:59:14,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:59:14,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 23:59:14,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-25 23:59:14,468 INFO L87 Difference]: Start difference. First operand 44692 states and 71605 transitions. Second operand has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 2 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2022-11-25 23:59:19,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:59:19,993 INFO L93 Difference]: Finished difference Result 89332 states and 148213 transitions. [2022-11-25 23:59:19,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 23:59:19,993 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 2 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) Word has length 182 [2022-11-25 23:59:19,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:59:20,450 INFO L225 Difference]: With dead ends: 89332 [2022-11-25 23:59:20,451 INFO L226 Difference]: Without dead ends: 46637 [2022-11-25 23:59:20,811 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-25 23:59:20,812 INFO L413 NwaCegarLoop]: 604 mSDtfsCounter, 56 mSDsluCounter, 568 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 1172 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 23:59:20,813 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 1172 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 23:59:20,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46637 states.