./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec3_product01.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e7fbc69 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_f3802908-971f-401b-9007-69d641077922/bin/utaipan-Q6hlc19bkW/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3802908-971f-401b-9007-69d641077922/bin/utaipan-Q6hlc19bkW/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3802908-971f-401b-9007-69d641077922/bin/utaipan-Q6hlc19bkW/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3802908-971f-401b-9007-69d641077922/bin/utaipan-Q6hlc19bkW/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec3_product01.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3802908-971f-401b-9007-69d641077922/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3802908-971f-401b-9007-69d641077922/bin/utaipan-Q6hlc19bkW --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 2e63e44256bba8522bf99795cd1238c2e8ad8456659e8a545df838f8f88bd318 --- 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-4e7fbc6 [2022-11-23 15:42:31,188 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 15:42:31,191 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 15:42:31,213 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 15:42:31,213 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 15:42:31,215 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 15:42:31,216 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 15:42:31,218 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 15:42:31,220 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 15:42:31,221 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 15:42:31,222 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 15:42:31,223 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 15:42:31,224 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 15:42:31,225 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 15:42:31,226 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 15:42:31,227 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 15:42:31,228 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 15:42:31,229 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 15:42:31,231 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 15:42:31,233 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 15:42:31,235 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 15:42:31,236 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 15:42:31,238 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 15:42:31,239 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 15:42:31,245 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 15:42:31,245 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 15:42:31,246 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 15:42:31,253 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 15:42:31,254 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 15:42:31,255 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 15:42:31,255 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 15:42:31,256 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 15:42:31,257 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 15:42:31,258 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 15:42:31,259 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 15:42:31,259 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 15:42:31,260 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 15:42:31,260 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 15:42:31,261 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 15:42:31,262 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 15:42:31,281 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 15:42:31,282 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3802908-971f-401b-9007-69d641077922/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-23 15:42:31,344 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 15:42:31,345 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 15:42:31,345 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 15:42:31,346 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 15:42:31,347 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 15:42:31,347 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 15:42:31,347 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-23 15:42:31,348 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-23 15:42:31,348 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-23 15:42:31,348 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-23 15:42:31,349 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-23 15:42:31,350 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-23 15:42:31,350 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-23 15:42:31,350 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-23 15:42:31,350 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-23 15:42:31,351 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-23 15:42:31,351 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-23 15:42:31,351 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-23 15:42:31,353 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 15:42:31,353 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 15:42:31,353 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 15:42:31,353 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 15:42:31,354 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 15:42:31,354 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-23 15:42:31,354 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 15:42:31,354 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-23 15:42:31,355 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 15:42:31,355 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-23 15:42:31,356 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 15:42:31,356 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-23 15:42:31,356 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 15:42:31,357 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 15:42:31,357 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 15:42:31,357 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 15:42:31,357 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-23 15:42:31,358 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 15:42:31,358 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-23 15:42:31,358 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-23 15:42:31,359 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 15:42:31,359 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-23 15:42:31,359 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-23 15:42:31,359 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_f3802908-971f-401b-9007-69d641077922/bin/utaipan-Q6hlc19bkW/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3802908-971f-401b-9007-69d641077922/bin/utaipan-Q6hlc19bkW Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2e63e44256bba8522bf99795cd1238c2e8ad8456659e8a545df838f8f88bd318 [2022-11-23 15:42:31,637 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 15:42:31,657 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 15:42:31,660 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 15:42:31,661 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 15:42:31,661 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 15:42:31,663 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3802908-971f-401b-9007-69d641077922/bin/utaipan-Q6hlc19bkW/../../sv-benchmarks/c/product-lines/elevator_spec3_product01.cil.c [2022-11-23 15:42:34,627 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 15:42:35,045 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 15:42:35,054 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3802908-971f-401b-9007-69d641077922/sv-benchmarks/c/product-lines/elevator_spec3_product01.cil.c [2022-11-23 15:42:35,073 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3802908-971f-401b-9007-69d641077922/bin/utaipan-Q6hlc19bkW/data/278c15937/69770d8993134e18b9b3228da9be1d84/FLAG07c866728 [2022-11-23 15:42:35,087 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3802908-971f-401b-9007-69d641077922/bin/utaipan-Q6hlc19bkW/data/278c15937/69770d8993134e18b9b3228da9be1d84 [2022-11-23 15:42:35,090 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 15:42:35,091 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 15:42:35,093 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 15:42:35,093 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 15:42:35,097 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 15:42:35,098 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:42:35" (1/1) ... [2022-11-23 15:42:35,100 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7ee3a498 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:42:35, skipping insertion in model container [2022-11-23 15:42:35,100 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:42:35" (1/1) ... [2022-11-23 15:42:35,108 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 15:42:35,202 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 15:42:35,697 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_f3802908-971f-401b-9007-69d641077922/sv-benchmarks/c/product-lines/elevator_spec3_product01.cil.c[40412,40425] [2022-11-23 15:42:35,785 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 15:42:35,797 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 15:42:35,880 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_f3802908-971f-401b-9007-69d641077922/sv-benchmarks/c/product-lines/elevator_spec3_product01.cil.c[40412,40425] [2022-11-23 15:42:35,954 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 15:42:35,992 INFO L208 MainTranslator]: Completed translation [2022-11-23 15:42:35,993 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:42:35 WrapperNode [2022-11-23 15:42:35,993 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 15:42:35,994 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 15:42:35,995 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 15:42:35,995 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 15:42:36,003 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:42:35" (1/1) ... [2022-11-23 15:42:36,041 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:42:35" (1/1) ... [2022-11-23 15:42:36,104 INFO L138 Inliner]: procedures = 86, calls = 334, calls flagged for inlining = 21, calls inlined = 18, statements flattened = 750 [2022-11-23 15:42:36,105 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 15:42:36,106 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 15:42:36,106 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 15:42:36,106 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 15:42:36,116 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:42:35" (1/1) ... [2022-11-23 15:42:36,116 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:42:35" (1/1) ... [2022-11-23 15:42:36,123 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:42:35" (1/1) ... [2022-11-23 15:42:36,123 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:42:35" (1/1) ... [2022-11-23 15:42:36,166 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:42:35" (1/1) ... [2022-11-23 15:42:36,191 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:42:35" (1/1) ... [2022-11-23 15:42:36,195 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:42:35" (1/1) ... [2022-11-23 15:42:36,216 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:42:35" (1/1) ... [2022-11-23 15:42:36,224 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 15:42:36,225 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 15:42:36,235 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 15:42:36,235 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 15:42:36,236 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:42:35" (1/1) ... [2022-11-23 15:42:36,247 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 15:42:36,259 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3802908-971f-401b-9007-69d641077922/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:42:36,280 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3802908-971f-401b-9007-69d641077922/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 15:42:36,334 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3802908-971f-401b-9007-69d641077922/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 15:42:36,352 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 15:42:36,352 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2022-11-23 15:42:36,352 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2022-11-23 15:42:36,352 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2022-11-23 15:42:36,352 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2022-11-23 15:42:36,352 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2022-11-23 15:42:36,353 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2022-11-23 15:42:36,353 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2022-11-23 15:42:36,353 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2022-11-23 15:42:36,353 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2022-11-23 15:42:36,353 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2022-11-23 15:42:36,353 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2022-11-23 15:42:36,353 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2022-11-23 15:42:36,353 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2022-11-23 15:42:36,354 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2022-11-23 15:42:36,354 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2022-11-23 15:42:36,354 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2022-11-23 15:42:36,354 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2022-11-23 15:42:36,354 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2022-11-23 15:42:36,354 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2022-11-23 15:42:36,354 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2022-11-23 15:42:36,354 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2022-11-23 15:42:36,355 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2022-11-23 15:42:36,356 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2022-11-23 15:42:36,356 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2022-11-23 15:42:36,356 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2022-11-23 15:42:36,357 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2022-11-23 15:42:36,357 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2022-11-23 15:42:36,357 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2022-11-23 15:42:36,357 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2022-11-23 15:42:36,357 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2022-11-23 15:42:36,357 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2022-11-23 15:42:36,358 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2022-11-23 15:42:36,358 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2022-11-23 15:42:36,358 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2022-11-23 15:42:36,358 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2022-11-23 15:42:36,358 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2022-11-23 15:42:36,358 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-23 15:42:36,359 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2022-11-23 15:42:36,359 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2022-11-23 15:42:36,359 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2022-11-23 15:42:36,359 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2022-11-23 15:42:36,359 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2022-11-23 15:42:36,360 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2022-11-23 15:42:36,360 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2022-11-23 15:42:36,360 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2022-11-23 15:42:36,360 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 15:42:36,361 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 15:42:36,361 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2022-11-23 15:42:36,361 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2022-11-23 15:42:36,551 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 15:42:36,553 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 15:42:37,736 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 15:42:38,559 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 15:42:38,559 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-23 15:42:38,564 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:42:38 BoogieIcfgContainer [2022-11-23 15:42:38,564 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 15:42:38,568 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 15:42:38,568 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 15:42:38,572 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 15:42:38,572 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 03:42:35" (1/3) ... [2022-11-23 15:42:38,574 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e1cd510 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:42:38, skipping insertion in model container [2022-11-23 15:42:38,574 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:42:35" (2/3) ... [2022-11-23 15:42:38,575 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e1cd510 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:42:38, skipping insertion in model container [2022-11-23 15:42:38,575 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:42:38" (3/3) ... [2022-11-23 15:42:38,577 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec3_product01.cil.c [2022-11-23 15:42:38,598 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 15:42:38,598 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-23 15:42:38,685 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 15:42:38,694 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;@7ea2933b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 15:42:38,695 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-23 15:42:38,703 INFO L276 IsEmpty]: Start isEmpty. Operand has 377 states, 254 states have (on average 1.5984251968503937) internal successors, (406), 272 states have internal predecessors, (406), 98 states have call successors, (98), 23 states have call predecessors, (98), 23 states have return successors, (98), 95 states have call predecessors, (98), 98 states have call successors, (98) [2022-11-23 15:42:38,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-23 15:42:38,733 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:42:38,734 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:42:38,734 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:42:38,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:42:38,740 INFO L85 PathProgramCache]: Analyzing trace with hash 1523319636, now seen corresponding path program 1 times [2022-11-23 15:42:38,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:42:38,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249348778] [2022-11-23 15:42:38,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:42:38,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:42:39,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:42:39,727 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 15:42:39,728 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:42:39,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249348778] [2022-11-23 15:42:39,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249348778] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:42:39,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354813268] [2022-11-23 15:42:39,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:42:39,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:42:39,732 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3802908-971f-401b-9007-69d641077922/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:42:39,738 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3802908-971f-401b-9007-69d641077922/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:42:39,746 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3802908-971f-401b-9007-69d641077922/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-23 15:42:40,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:42:40,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 1504 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-23 15:42:40,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:42:40,267 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:42:40,268 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:42:40,268 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [354813268] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:42:40,268 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 15:42:40,269 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-23 15:42:40,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970824367] [2022-11-23 15:42:40,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:42:40,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:42:40,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:42:40,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:42:40,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-23 15:42:40,306 INFO L87 Difference]: Start difference. First operand has 377 states, 254 states have (on average 1.5984251968503937) internal successors, (406), 272 states have internal predecessors, (406), 98 states have call successors, (98), 23 states have call predecessors, (98), 23 states have return successors, (98), 95 states have call predecessors, (98), 98 states have call successors, (98) Second operand has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-23 15:42:40,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:42:40,718 INFO L93 Difference]: Finished difference Result 1056 states and 1713 transitions. [2022-11-23 15:42:40,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:42:40,721 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 63 [2022-11-23 15:42:40,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:42:40,749 INFO L225 Difference]: With dead ends: 1056 [2022-11-23 15:42:40,750 INFO L226 Difference]: Without dead ends: 681 [2022-11-23 15:42:40,761 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-23 15:42:40,764 INFO L413 NwaCegarLoop]: 643 mSDtfsCounter, 552 mSDsluCounter, 478 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 552 SdHoareTripleChecker+Valid, 1121 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 15:42:40,765 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [552 Valid, 1121 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 15:42:40,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 681 states. [2022-11-23 15:42:40,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 681 to 669. [2022-11-23 15:42:40,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 669 states, 456 states have (on average 1.5921052631578947) internal successors, (726), 487 states have internal predecessors, (726), 172 states have call successors, (172), 41 states have call predecessors, (172), 40 states have return successors, (174), 166 states have call predecessors, (174), 169 states have call successors, (174) [2022-11-23 15:42:40,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 669 states to 669 states and 1072 transitions. [2022-11-23 15:42:40,899 INFO L78 Accepts]: Start accepts. Automaton has 669 states and 1072 transitions. Word has length 63 [2022-11-23 15:42:40,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:42:40,900 INFO L495 AbstractCegarLoop]: Abstraction has 669 states and 1072 transitions. [2022-11-23 15:42:40,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-23 15:42:40,902 INFO L276 IsEmpty]: Start isEmpty. Operand 669 states and 1072 transitions. [2022-11-23 15:42:40,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-11-23 15:42:40,911 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:42:40,912 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] [2022-11-23 15:42:40,927 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3802908-971f-401b-9007-69d641077922/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-23 15:42:41,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3802908-971f-401b-9007-69d641077922/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-11-23 15:42:41,128 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:42:41,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:42:41,128 INFO L85 PathProgramCache]: Analyzing trace with hash -594469980, now seen corresponding path program 1 times [2022-11-23 15:42:41,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:42:41,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793025374] [2022-11-23 15:42:41,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:42:41,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:42:41,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:42:41,675 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 15:42:41,675 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:42:41,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793025374] [2022-11-23 15:42:41,676 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793025374] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:42:41,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38326531] [2022-11-23 15:42:41,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:42:41,677 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:42:41,677 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3802908-971f-401b-9007-69d641077922/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:42:41,683 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3802908-971f-401b-9007-69d641077922/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:42:41,694 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3802908-971f-401b-9007-69d641077922/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-23 15:42:42,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:42:42,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 1515 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-23 15:42:42,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:42:42,213 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:42:42,213 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:42:42,213 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [38326531] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:42:42,214 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 15:42:42,214 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2022-11-23 15:42:42,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882845151] [2022-11-23 15:42:42,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:42:42,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:42:42,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:42:42,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:42:42,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-23 15:42:42,216 INFO L87 Difference]: Start difference. First operand 669 states and 1072 transitions. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 3 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-23 15:42:42,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:42:42,590 INFO L93 Difference]: Finished difference Result 1905 states and 3088 transitions. [2022-11-23 15:42:42,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:42:42,591 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 3 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) Word has length 64 [2022-11-23 15:42:42,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:42:42,604 INFO L225 Difference]: With dead ends: 1905 [2022-11-23 15:42:42,605 INFO L226 Difference]: Without dead ends: 1248 [2022-11-23 15:42:42,610 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-23 15:42:42,611 INFO L413 NwaCegarLoop]: 670 mSDtfsCounter, 474 mSDsluCounter, 486 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 474 SdHoareTripleChecker+Valid, 1156 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 15:42:42,613 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [474 Valid, 1156 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 15:42:42,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1248 states. [2022-11-23 15:42:42,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1248 to 1228. [2022-11-23 15:42:42,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1228 states, 833 states have (on average 1.547418967587035) internal successors, (1289), 893 states have internal predecessors, (1289), 321 states have call successors, (321), 76 states have call predecessors, (321), 73 states have return successors, (340), 308 states have call predecessors, (340), 317 states have call successors, (340) [2022-11-23 15:42:42,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1228 states to 1228 states and 1950 transitions. [2022-11-23 15:42:42,744 INFO L78 Accepts]: Start accepts. Automaton has 1228 states and 1950 transitions. Word has length 64 [2022-11-23 15:42:42,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:42:42,746 INFO L495 AbstractCegarLoop]: Abstraction has 1228 states and 1950 transitions. [2022-11-23 15:42:42,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 3 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-23 15:42:42,747 INFO L276 IsEmpty]: Start isEmpty. Operand 1228 states and 1950 transitions. [2022-11-23 15:42:42,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-23 15:42:42,752 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:42:42,752 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:42:42,766 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3802908-971f-401b-9007-69d641077922/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-23 15:42:42,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3802908-971f-401b-9007-69d641077922/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2022-11-23 15:42:42,961 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:42:42,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:42:42,962 INFO L85 PathProgramCache]: Analyzing trace with hash 1764450137, now seen corresponding path program 1 times [2022-11-23 15:42:42,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:42:42,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358930683] [2022-11-23 15:42:42,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:42:42,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:42:43,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:42:43,417 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 15:42:43,417 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:42:43,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358930683] [2022-11-23 15:42:43,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358930683] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:42:43,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610640886] [2022-11-23 15:42:43,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:42:43,421 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:42:43,421 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3802908-971f-401b-9007-69d641077922/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:42:43,422 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3802908-971f-401b-9007-69d641077922/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:42:43,442 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3802908-971f-401b-9007-69d641077922/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-23 15:42:43,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:42:43,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 1531 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-23 15:42:43,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:42:43,816 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:42:43,816 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:42:43,817 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [610640886] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:42:43,817 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 15:42:43,817 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 10 [2022-11-23 15:42:43,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494222668] [2022-11-23 15:42:43,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:42:43,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 15:42:43,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:42:43,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 15:42:43,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-11-23 15:42:43,820 INFO L87 Difference]: Start difference. First operand 1228 states and 1950 transitions. Second operand has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-23 15:42:44,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:42:44,160 INFO L93 Difference]: Finished difference Result 2375 states and 3847 transitions. [2022-11-23 15:42:44,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 15:42:44,161 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 68 [2022-11-23 15:42:44,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:42:44,176 INFO L225 Difference]: With dead ends: 2375 [2022-11-23 15:42:44,176 INFO L226 Difference]: Without dead ends: 1594 [2022-11-23 15:42:44,184 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-11-23 15:42:44,187 INFO L413 NwaCegarLoop]: 620 mSDtfsCounter, 139 mSDsluCounter, 1127 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 1747 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 15:42:44,192 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 1747 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 15:42:44,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1594 states. [2022-11-23 15:42:44,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1594 to 1414. [2022-11-23 15:42:44,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1414 states, 929 states have (on average 1.534983853606028) internal successors, (1426), 1015 states have internal predecessors, (1426), 409 states have call successors, (409), 76 states have call predecessors, (409), 75 states have return successors, (436), 396 states have call predecessors, (436), 405 states have call successors, (436) [2022-11-23 15:42:44,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1414 states to 1414 states and 2271 transitions. [2022-11-23 15:42:44,311 INFO L78 Accepts]: Start accepts. Automaton has 1414 states and 2271 transitions. Word has length 68 [2022-11-23 15:42:44,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:42:44,312 INFO L495 AbstractCegarLoop]: Abstraction has 1414 states and 2271 transitions. [2022-11-23 15:42:44,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-23 15:42:44,312 INFO L276 IsEmpty]: Start isEmpty. Operand 1414 states and 2271 transitions. [2022-11-23 15:42:44,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-11-23 15:42:44,315 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:42:44,315 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:42:44,331 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3802908-971f-401b-9007-69d641077922/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-11-23 15:42:44,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3802908-971f-401b-9007-69d641077922/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:42:44,524 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:42:44,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:42:44,525 INFO L85 PathProgramCache]: Analyzing trace with hash 1396583808, now seen corresponding path program 1 times [2022-11-23 15:42:44,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:42:44,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194558963] [2022-11-23 15:42:44,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:42:44,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:42:44,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:42:44,926 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 15:42:44,926 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:42:44,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194558963] [2022-11-23 15:42:44,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194558963] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:42:44,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41088767] [2022-11-23 15:42:44,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:42:44,928 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:42:44,928 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3802908-971f-401b-9007-69d641077922/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:42:44,929 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3802908-971f-401b-9007-69d641077922/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:42:44,957 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3802908-971f-401b-9007-69d641077922/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-23 15:42:45,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:42:45,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 1542 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-23 15:42:45,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:42:45,473 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 15:42:45,473 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:42:45,473 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [41088767] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:42:45,473 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 15:42:45,474 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2022-11-23 15:42:45,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228463910] [2022-11-23 15:42:45,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:42:45,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 15:42:45,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:42:45,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 15:42:45,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-11-23 15:42:45,476 INFO L87 Difference]: Start difference. First operand 1414 states and 2271 transitions. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 4 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) [2022-11-23 15:42:46,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:42:46,220 INFO L93 Difference]: Finished difference Result 2533 states and 4052 transitions. [2022-11-23 15:42:46,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 15:42:46,221 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 4 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) Word has length 72 [2022-11-23 15:42:46,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:42:46,231 INFO L225 Difference]: With dead ends: 2533 [2022-11-23 15:42:46,231 INFO L226 Difference]: Without dead ends: 1572 [2022-11-23 15:42:46,237 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-11-23 15:42:46,240 INFO L413 NwaCegarLoop]: 699 mSDtfsCounter, 527 mSDsluCounter, 1314 mSDsCounter, 0 mSdLazyCounter, 501 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 535 SdHoareTripleChecker+Valid, 2013 SdHoareTripleChecker+Invalid, 507 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-23 15:42:46,244 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [535 Valid, 2013 Invalid, 507 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 501 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-23 15:42:46,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1572 states. [2022-11-23 15:42:46,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1572 to 1558. [2022-11-23 15:42:46,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1558 states, 1045 states have (on average 1.5196172248803828) internal successors, (1588), 1133 states have internal predecessors, (1588), 427 states have call successors, (427), 84 states have call predecessors, (427), 85 states have return successors, (456), 414 states have call predecessors, (456), 423 states have call successors, (456) [2022-11-23 15:42:46,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1558 states to 1558 states and 2471 transitions. [2022-11-23 15:42:46,346 INFO L78 Accepts]: Start accepts. Automaton has 1558 states and 2471 transitions. Word has length 72 [2022-11-23 15:42:46,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:42:46,347 INFO L495 AbstractCegarLoop]: Abstraction has 1558 states and 2471 transitions. [2022-11-23 15:42:46,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 4 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) [2022-11-23 15:42:46,348 INFO L276 IsEmpty]: Start isEmpty. Operand 1558 states and 2471 transitions. [2022-11-23 15:42:46,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-23 15:42:46,351 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:42:46,351 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:42:46,364 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3802908-971f-401b-9007-69d641077922/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-23 15:42:46,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3802908-971f-401b-9007-69d641077922/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:42:46,559 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:42:46,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:42:46,560 INFO L85 PathProgramCache]: Analyzing trace with hash -592867885, now seen corresponding path program 1 times [2022-11-23 15:42:46,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:42:46,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974483718] [2022-11-23 15:42:46,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:42:46,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:42:46,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:42:46,964 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 15:42:46,965 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:42:46,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974483718] [2022-11-23 15:42:46,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974483718] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:42:46,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [878358123] [2022-11-23 15:42:46,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:42:46,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:42:46,966 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3802908-971f-401b-9007-69d641077922/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:42:46,967 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3802908-971f-401b-9007-69d641077922/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:42:46,994 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3802908-971f-401b-9007-69d641077922/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-23 15:42:47,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:42:47,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 1531 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-23 15:42:47,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:42:47,361 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 15:42:47,361 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:42:47,361 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [878358123] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:42:47,361 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 15:42:47,361 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2022-11-23 15:42:47,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980335272] [2022-11-23 15:42:47,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:42:47,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 15:42:47,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:42:47,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 15:42:47,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-23 15:42:47,363 INFO L87 Difference]: Start difference. First operand 1558 states and 2471 transitions. Second operand has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-23 15:42:47,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:42:47,666 INFO L93 Difference]: Finished difference Result 2921 states and 4685 transitions. [2022-11-23 15:42:47,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 15:42:47,667 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 73 [2022-11-23 15:42:47,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:42:47,677 INFO L225 Difference]: With dead ends: 2921 [2022-11-23 15:42:47,677 INFO L226 Difference]: Without dead ends: 1558 [2022-11-23 15:42:47,685 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-11-23 15:42:47,686 INFO L413 NwaCegarLoop]: 590 mSDtfsCounter, 279 mSDsluCounter, 944 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 290 SdHoareTripleChecker+Valid, 1534 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 15:42:47,686 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [290 Valid, 1534 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 15:42:47,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1558 states. [2022-11-23 15:42:47,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1558 to 1558. [2022-11-23 15:42:47,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1558 states, 1045 states have (on average 1.4851674641148325) internal successors, (1552), 1133 states have internal predecessors, (1552), 427 states have call successors, (427), 84 states have call predecessors, (427), 85 states have return successors, (456), 414 states have call predecessors, (456), 423 states have call successors, (456) [2022-11-23 15:42:47,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1558 states to 1558 states and 2435 transitions. [2022-11-23 15:42:47,823 INFO L78 Accepts]: Start accepts. Automaton has 1558 states and 2435 transitions. Word has length 73 [2022-11-23 15:42:47,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:42:47,824 INFO L495 AbstractCegarLoop]: Abstraction has 1558 states and 2435 transitions. [2022-11-23 15:42:47,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-23 15:42:47,824 INFO L276 IsEmpty]: Start isEmpty. Operand 1558 states and 2435 transitions. [2022-11-23 15:42:47,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-11-23 15:42:47,826 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:42:47,827 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:42:47,839 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3802908-971f-401b-9007-69d641077922/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-23 15:42:48,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3802908-971f-401b-9007-69d641077922/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:42:48,034 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:42:48,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:42:48,035 INFO L85 PathProgramCache]: Analyzing trace with hash -301825873, now seen corresponding path program 1 times [2022-11-23 15:42:48,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:42:48,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380687473] [2022-11-23 15:42:48,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:42:48,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:42:48,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:42:48,469 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-23 15:42:48,469 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:42:48,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380687473] [2022-11-23 15:42:48,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380687473] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:42:48,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235597767] [2022-11-23 15:42:48,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:42:48,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:42:48,470 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3802908-971f-401b-9007-69d641077922/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:42:48,471 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3802908-971f-401b-9007-69d641077922/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:42:48,494 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3802908-971f-401b-9007-69d641077922/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-23 15:42:48,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:42:48,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 1541 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-23 15:42:48,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:42:49,080 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-23 15:42:49,081 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:42:49,418 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-23 15:42:49,419 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [235597767] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-23 15:42:49,420 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-23 15:42:49,420 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [6, 9] total 16 [2022-11-23 15:42:49,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970029817] [2022-11-23 15:42:49,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:42:49,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-23 15:42:49,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:42:49,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-23 15:42:49,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2022-11-23 15:42:49,422 INFO L87 Difference]: Start difference. First operand 1558 states and 2435 transitions. Second operand has 9 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 4 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (13), 4 states have call predecessors, (13), 3 states have call successors, (13) [2022-11-23 15:42:53,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:42:53,118 INFO L93 Difference]: Finished difference Result 3843 states and 6232 transitions. [2022-11-23 15:42:53,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-23 15:42:53,119 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 4 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (13), 4 states have call predecessors, (13), 3 states have call successors, (13) Word has length 75 [2022-11-23 15:42:53,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:42:53,141 INFO L225 Difference]: With dead ends: 3843 [2022-11-23 15:42:53,142 INFO L226 Difference]: Without dead ends: 2883 [2022-11-23 15:42:53,151 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 144 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=145, Invalid=725, Unknown=0, NotChecked=0, Total=870 [2022-11-23 15:42:53,152 INFO L413 NwaCegarLoop]: 646 mSDtfsCounter, 2266 mSDsluCounter, 2422 mSDsCounter, 0 mSdLazyCounter, 2694 mSolverCounterSat, 1018 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2345 SdHoareTripleChecker+Valid, 3068 SdHoareTripleChecker+Invalid, 3712 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1018 IncrementalHoareTripleChecker+Valid, 2694 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:42:53,152 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2345 Valid, 3068 Invalid, 3712 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1018 Valid, 2694 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-11-23 15:42:53,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2883 states. [2022-11-23 15:42:53,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2883 to 2419. [2022-11-23 15:42:53,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2419 states, 1720 states have (on average 1.4924418604651162) internal successors, (2567), 1815 states have internal predecessors, (2567), 548 states have call successors, (548), 145 states have call predecessors, (548), 150 states have return successors, (656), 530 states have call predecessors, (656), 543 states have call successors, (656) [2022-11-23 15:42:53,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2419 states to 2419 states and 3771 transitions. [2022-11-23 15:42:53,481 INFO L78 Accepts]: Start accepts. Automaton has 2419 states and 3771 transitions. Word has length 75 [2022-11-23 15:42:53,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:42:53,483 INFO L495 AbstractCegarLoop]: Abstraction has 2419 states and 3771 transitions. [2022-11-23 15:42:53,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 4 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (13), 4 states have call predecessors, (13), 3 states have call successors, (13) [2022-11-23 15:42:53,485 INFO L276 IsEmpty]: Start isEmpty. Operand 2419 states and 3771 transitions. [2022-11-23 15:42:53,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-11-23 15:42:53,491 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:42:53,492 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:42:53,505 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3802908-971f-401b-9007-69d641077922/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-23 15:42:53,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3802908-971f-401b-9007-69d641077922/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:42:53,701 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:42:53,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:42:53,702 INFO L85 PathProgramCache]: Analyzing trace with hash -1898010201, now seen corresponding path program 1 times [2022-11-23 15:42:53,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:42:53,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961054494] [2022-11-23 15:42:53,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:42:53,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:42:53,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:42:53,969 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 15:42:53,969 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:42:53,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961054494] [2022-11-23 15:42:53,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961054494] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:42:53,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [952710830] [2022-11-23 15:42:53,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:42:53,970 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:42:53,970 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3802908-971f-401b-9007-69d641077922/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:42:53,971 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3802908-971f-401b-9007-69d641077922/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:42:53,993 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3802908-971f-401b-9007-69d641077922/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-23 15:42:54,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:42:54,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 1531 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-23 15:42:54,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:42:54,378 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 15:42:54,378 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:42:54,378 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [952710830] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:42:54,378 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 15:42:54,379 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-23 15:42:54,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032760578] [2022-11-23 15:42:54,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:42:54,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:42:54,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:42:54,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:42:54,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-23 15:42:54,381 INFO L87 Difference]: Start difference. First operand 2419 states and 3771 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2022-11-23 15:42:54,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:42:54,779 INFO L93 Difference]: Finished difference Result 5980 states and 9479 transitions. [2022-11-23 15:42:54,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:42:54,780 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 75 [2022-11-23 15:42:54,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:42:54,805 INFO L225 Difference]: With dead ends: 5980 [2022-11-23 15:42:54,805 INFO L226 Difference]: Without dead ends: 3573 [2022-11-23 15:42:54,819 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-23 15:42:54,820 INFO L413 NwaCegarLoop]: 818 mSDtfsCounter, 522 mSDsluCounter, 462 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 522 SdHoareTripleChecker+Valid, 1280 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:42:54,821 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [522 Valid, 1280 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:42:54,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3573 states. [2022-11-23 15:42:55,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3573 to 3505. [2022-11-23 15:42:55,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3505 states, 2502 states have (on average 1.4900079936051158) internal successors, (3728), 2645 states have internal predecessors, (3728), 784 states have call successors, (784), 207 states have call predecessors, (784), 218 states have return successors, (955), 760 states have call predecessors, (955), 779 states have call successors, (955) [2022-11-23 15:42:55,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3505 states to 3505 states and 5467 transitions. [2022-11-23 15:42:55,105 INFO L78 Accepts]: Start accepts. Automaton has 3505 states and 5467 transitions. Word has length 75 [2022-11-23 15:42:55,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:42:55,105 INFO L495 AbstractCegarLoop]: Abstraction has 3505 states and 5467 transitions. [2022-11-23 15:42:55,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2022-11-23 15:42:55,106 INFO L276 IsEmpty]: Start isEmpty. Operand 3505 states and 5467 transitions. [2022-11-23 15:42:55,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-11-23 15:42:55,111 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:42:55,111 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:42:55,123 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3802908-971f-401b-9007-69d641077922/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-11-23 15:42:55,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3802908-971f-401b-9007-69d641077922/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-23 15:42:55,318 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:42:55,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:42:55,319 INFO L85 PathProgramCache]: Analyzing trace with hash 1427051107, now seen corresponding path program 1 times [2022-11-23 15:42:55,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:42:55,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497445229] [2022-11-23 15:42:55,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:42:55,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:42:55,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:42:55,573 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-23 15:42:55,573 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:42:55,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497445229] [2022-11-23 15:42:55,573 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497445229] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:42:55,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074376091] [2022-11-23 15:42:55,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:42:55,574 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:42:55,574 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3802908-971f-401b-9007-69d641077922/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:42:55,575 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3802908-971f-401b-9007-69d641077922/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:42:55,607 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3802908-971f-401b-9007-69d641077922/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-23 15:42:55,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:42:55,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 1543 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-23 15:42:55,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:42:55,994 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-23 15:42:55,994 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:42:55,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1074376091] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:42:55,994 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 15:42:55,995 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2022-11-23 15:42:55,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382798694] [2022-11-23 15:42:55,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:42:55,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 15:42:55,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:42:55,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 15:42:55,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-23 15:42:55,998 INFO L87 Difference]: Start difference. First operand 3505 states and 5467 transitions. Second operand has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 4 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) [2022-11-23 15:42:56,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:42:56,845 INFO L93 Difference]: Finished difference Result 7281 states and 11525 transitions. [2022-11-23 15:42:56,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 15:42:56,846 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 4 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) Word has length 76 [2022-11-23 15:42:56,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:42:56,876 INFO L225 Difference]: With dead ends: 7281 [2022-11-23 15:42:56,876 INFO L226 Difference]: Without dead ends: 3788 [2022-11-23 15:42:56,895 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-11-23 15:42:56,896 INFO L413 NwaCegarLoop]: 692 mSDtfsCounter, 569 mSDsluCounter, 1193 mSDsCounter, 0 mSdLazyCounter, 306 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 624 SdHoareTripleChecker+Valid, 1885 SdHoareTripleChecker+Invalid, 440 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-23 15:42:56,896 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [624 Valid, 1885 Invalid, 440 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 306 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-23 15:42:56,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3788 states. [2022-11-23 15:42:57,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3788 to 3420. [2022-11-23 15:42:57,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3420 states, 2429 states have (on average 1.4804446274186909) internal successors, (3596), 2574 states have internal predecessors, (3596), 784 states have call successors, (784), 193 states have call predecessors, (784), 206 states have return successors, (1017), 748 states have call predecessors, (1017), 779 states have call successors, (1017) [2022-11-23 15:42:57,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3420 states to 3420 states and 5397 transitions. [2022-11-23 15:42:57,210 INFO L78 Accepts]: Start accepts. Automaton has 3420 states and 5397 transitions. Word has length 76 [2022-11-23 15:42:57,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:42:57,212 INFO L495 AbstractCegarLoop]: Abstraction has 3420 states and 5397 transitions. [2022-11-23 15:42:57,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 4 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) [2022-11-23 15:42:57,213 INFO L276 IsEmpty]: Start isEmpty. Operand 3420 states and 5397 transitions. [2022-11-23 15:42:57,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-11-23 15:42:57,215 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:42:57,215 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:42:57,227 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3802908-971f-401b-9007-69d641077922/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-23 15:42:57,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3802908-971f-401b-9007-69d641077922/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-23 15:42:57,423 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:42:57,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:42:57,424 INFO L85 PathProgramCache]: Analyzing trace with hash -1900902815, now seen corresponding path program 1 times [2022-11-23 15:42:57,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:42:57,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316816369] [2022-11-23 15:42:57,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:42:57,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:42:57,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:42:57,875 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-23 15:42:57,875 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:42:57,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316816369] [2022-11-23 15:42:57,876 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316816369] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:42:57,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597680558] [2022-11-23 15:42:57,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:42:57,876 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:42:57,877 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3802908-971f-401b-9007-69d641077922/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:42:57,878 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3802908-971f-401b-9007-69d641077922/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:42:57,905 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3802908-971f-401b-9007-69d641077922/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-23 15:42:58,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:42:58,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 1558 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-23 15:42:58,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:42:58,359 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-23 15:42:58,359 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:42:58,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1597680558] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:42:58,359 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 15:42:58,360 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2022-11-23 15:42:58,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585896922] [2022-11-23 15:42:58,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:42:58,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 15:42:58,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:42:58,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 15:42:58,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-23 15:42:58,362 INFO L87 Difference]: Start difference. First operand 3420 states and 5397 transitions. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 4 states have call successors, (16), 3 states have call predecessors, (16), 4 states have return successors, (14), 3 states have call predecessors, (14), 4 states have call successors, (14) [2022-11-23 15:42:59,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:42:59,168 INFO L93 Difference]: Finished difference Result 6280 states and 9942 transitions. [2022-11-23 15:42:59,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 15:42:59,169 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 4 states have call successors, (16), 3 states have call predecessors, (16), 4 states have return successors, (14), 3 states have call predecessors, (14), 4 states have call successors, (14) Word has length 79 [2022-11-23 15:42:59,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:42:59,194 INFO L225 Difference]: With dead ends: 6280 [2022-11-23 15:42:59,194 INFO L226 Difference]: Without dead ends: 3441 [2022-11-23 15:42:59,210 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-11-23 15:42:59,212 INFO L413 NwaCegarLoop]: 724 mSDtfsCounter, 407 mSDsluCounter, 1815 mSDsCounter, 0 mSdLazyCounter, 347 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 407 SdHoareTripleChecker+Valid, 2539 SdHoareTripleChecker+Invalid, 353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-23 15:42:59,212 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [407 Valid, 2539 Invalid, 353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 347 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-23 15:42:59,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3441 states. [2022-11-23 15:42:59,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3441 to 3424. [2022-11-23 15:42:59,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3424 states, 2429 states have (on average 1.4804446274186909) internal successors, (3596), 2578 states have internal predecessors, (3596), 788 states have call successors, (788), 193 states have call predecessors, (788), 206 states have return successors, (1021), 748 states have call predecessors, (1021), 783 states have call successors, (1021) [2022-11-23 15:42:59,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3424 states to 3424 states and 5405 transitions. [2022-11-23 15:42:59,537 INFO L78 Accepts]: Start accepts. Automaton has 3424 states and 5405 transitions. Word has length 79 [2022-11-23 15:42:59,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:42:59,538 INFO L495 AbstractCegarLoop]: Abstraction has 3424 states and 5405 transitions. [2022-11-23 15:42:59,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 4 states have call successors, (16), 3 states have call predecessors, (16), 4 states have return successors, (14), 3 states have call predecessors, (14), 4 states have call successors, (14) [2022-11-23 15:42:59,538 INFO L276 IsEmpty]: Start isEmpty. Operand 3424 states and 5405 transitions. [2022-11-23 15:42:59,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-11-23 15:42:59,542 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:42:59,542 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:42:59,552 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3802908-971f-401b-9007-69d641077922/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-23 15:42:59,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3802908-971f-401b-9007-69d641077922/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:42:59,750 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:42:59,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:42:59,750 INFO L85 PathProgramCache]: Analyzing trace with hash -839992010, now seen corresponding path program 1 times [2022-11-23 15:42:59,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:42:59,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778649508] [2022-11-23 15:42:59,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:42:59,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:42:59,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:43:00,101 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-23 15:43:00,101 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:43:00,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778649508] [2022-11-23 15:43:00,102 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778649508] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:43:00,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265447149] [2022-11-23 15:43:00,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:43:00,102 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:43:00,103 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3802908-971f-401b-9007-69d641077922/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:43:00,104 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3802908-971f-401b-9007-69d641077922/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:43:00,130 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3802908-971f-401b-9007-69d641077922/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-23 15:43:00,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:43:00,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 1630 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-23 15:43:00,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:43:00,517 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-23 15:43:00,518 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:43:00,518 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1265447149] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:43:00,518 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 15:43:00,518 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2022-11-23 15:43:00,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925646728] [2022-11-23 15:43:00,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:43:00,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 15:43:00,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:43:00,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 15:43:00,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-23 15:43:00,520 INFO L87 Difference]: Start difference. First operand 3424 states and 5405 transitions. Second operand has 5 states, 5 states have (on average 11.4) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 3 states have call predecessors, (18), 2 states have call successors, (18) [2022-11-23 15:43:00,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:43:00,939 INFO L93 Difference]: Finished difference Result 6597 states and 10654 transitions. [2022-11-23 15:43:00,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 15:43:00,940 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 3 states have call predecessors, (18), 2 states have call successors, (18) Word has length 99 [2022-11-23 15:43:00,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:43:00,983 INFO L225 Difference]: With dead ends: 6597 [2022-11-23 15:43:00,983 INFO L226 Difference]: Without dead ends: 3615 [2022-11-23 15:43:01,006 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-23 15:43:01,007 INFO L413 NwaCegarLoop]: 559 mSDtfsCounter, 13 mSDsluCounter, 1645 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 2204 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 15:43:01,008 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 2204 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 15:43:01,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3615 states. [2022-11-23 15:43:01,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3615 to 3498. [2022-11-23 15:43:01,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3498 states, 2479 states have (on average 1.4707543364259783) internal successors, (3646), 2637 states have internal predecessors, (3646), 792 states have call successors, (792), 193 states have call predecessors, (792), 226 states have return successors, (1143), 763 states have call predecessors, (1143), 787 states have call successors, (1143) [2022-11-23 15:43:01,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3498 states to 3498 states and 5581 transitions. [2022-11-23 15:43:01,313 INFO L78 Accepts]: Start accepts. Automaton has 3498 states and 5581 transitions. Word has length 99 [2022-11-23 15:43:01,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:43:01,314 INFO L495 AbstractCegarLoop]: Abstraction has 3498 states and 5581 transitions. [2022-11-23 15:43:01,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 3 states have call predecessors, (18), 2 states have call successors, (18) [2022-11-23 15:43:01,315 INFO L276 IsEmpty]: Start isEmpty. Operand 3498 states and 5581 transitions. [2022-11-23 15:43:01,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-11-23 15:43:01,322 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:43:01,322 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:43:01,331 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3802908-971f-401b-9007-69d641077922/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-23 15:43:01,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3802908-971f-401b-9007-69d641077922/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-23 15:43:01,530 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:43:01,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:43:01,531 INFO L85 PathProgramCache]: Analyzing trace with hash 1317662866, now seen corresponding path program 1 times [2022-11-23 15:43:01,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:43:01,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169682972] [2022-11-23 15:43:01,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:43:01,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:43:01,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:43:01,822 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-23 15:43:01,823 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:43:01,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169682972] [2022-11-23 15:43:01,823 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169682972] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:43:01,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237489097] [2022-11-23 15:43:01,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:43:01,824 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:43:01,824 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3802908-971f-401b-9007-69d641077922/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:43:01,825 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3802908-971f-401b-9007-69d641077922/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:43:01,857 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3802908-971f-401b-9007-69d641077922/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-23 15:43:02,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:43:02,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 1863 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-23 15:43:02,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:43:02,412 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-23 15:43:02,412 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:43:02,412 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [237489097] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:43:02,412 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 15:43:02,413 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 14 [2022-11-23 15:43:02,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351342387] [2022-11-23 15:43:02,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:43:02,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-23 15:43:02,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:43:02,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-23 15:43:02,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2022-11-23 15:43:02,415 INFO L87 Difference]: Start difference. First operand 3498 states and 5581 transitions. Second operand has 8 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 5 states have call successors, (21), 4 states have call predecessors, (21), 5 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) [2022-11-23 15:43:06,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:43:06,607 INFO L93 Difference]: Finished difference Result 7783 states and 12613 transitions. [2022-11-23 15:43:06,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-23 15:43:06,608 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 5 states have call successors, (21), 4 states have call predecessors, (21), 5 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) Word has length 117 [2022-11-23 15:43:06,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:43:06,648 INFO L225 Difference]: With dead ends: 7783 [2022-11-23 15:43:06,648 INFO L226 Difference]: Without dead ends: 4181 [2022-11-23 15:43:06,668 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2022-11-23 15:43:06,669 INFO L413 NwaCegarLoop]: 398 mSDtfsCounter, 1629 mSDsluCounter, 1122 mSDsCounter, 0 mSdLazyCounter, 3646 mSolverCounterSat, 1059 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1660 SdHoareTripleChecker+Valid, 1520 SdHoareTripleChecker+Invalid, 4705 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1059 IncrementalHoareTripleChecker+Valid, 3646 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-11-23 15:43:06,669 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1660 Valid, 1520 Invalid, 4705 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1059 Valid, 3646 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2022-11-23 15:43:06,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4181 states. [2022-11-23 15:43:07,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4181 to 3493. [2022-11-23 15:43:07,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3493 states, 2474 states have (on average 1.471301535974131) internal successors, (3640), 2632 states have internal predecessors, (3640), 792 states have call successors, (792), 193 states have call predecessors, (792), 226 states have return successors, (1143), 763 states have call predecessors, (1143), 787 states have call successors, (1143) [2022-11-23 15:43:07,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3493 states to 3493 states and 5575 transitions. [2022-11-23 15:43:07,079 INFO L78 Accepts]: Start accepts. Automaton has 3493 states and 5575 transitions. Word has length 117 [2022-11-23 15:43:07,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:43:07,079 INFO L495 AbstractCegarLoop]: Abstraction has 3493 states and 5575 transitions. [2022-11-23 15:43:07,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 5 states have call successors, (21), 4 states have call predecessors, (21), 5 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) [2022-11-23 15:43:07,080 INFO L276 IsEmpty]: Start isEmpty. Operand 3493 states and 5575 transitions. [2022-11-23 15:43:07,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-11-23 15:43:07,086 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:43:07,087 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:43:07,100 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3802908-971f-401b-9007-69d641077922/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-23 15:43:07,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3802908-971f-401b-9007-69d641077922/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-23 15:43:07,295 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:43:07,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:43:07,296 INFO L85 PathProgramCache]: Analyzing trace with hash 2095557858, now seen corresponding path program 1 times [2022-11-23 15:43:07,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:43:07,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596353389] [2022-11-23 15:43:07,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:43:07,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:43:07,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:43:07,698 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 22 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-23 15:43:07,699 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:43:07,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596353389] [2022-11-23 15:43:07,699 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596353389] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:43:07,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833661124] [2022-11-23 15:43:07,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:43:07,700 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:43:07,700 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3802908-971f-401b-9007-69d641077922/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:43:07,701 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3802908-971f-401b-9007-69d641077922/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:43:07,732 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3802908-971f-401b-9007-69d641077922/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-23 15:43:08,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:43:08,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 1874 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-23 15:43:08,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:43:08,213 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-23 15:43:08,214 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:43:08,214 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [833661124] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:43:08,214 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 15:43:08,214 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2022-11-23 15:43:08,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281577210] [2022-11-23 15:43:08,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:43:08,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:43:08,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:43:08,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:43:08,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-23 15:43:08,218 INFO L87 Difference]: Start difference. First operand 3493 states and 5575 transitions. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 3 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) [2022-11-23 15:43:08,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:43:08,804 INFO L93 Difference]: Finished difference Result 8154 states and 13245 transitions. [2022-11-23 15:43:08,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:43:08,805 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 3 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) Word has length 118 [2022-11-23 15:43:08,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:43:08,849 INFO L225 Difference]: With dead ends: 8154 [2022-11-23 15:43:08,849 INFO L226 Difference]: Without dead ends: 4673 [2022-11-23 15:43:08,869 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-23 15:43:08,870 INFO L413 NwaCegarLoop]: 772 mSDtfsCounter, 459 mSDsluCounter, 533 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 459 SdHoareTripleChecker+Valid, 1305 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:43:08,871 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [459 Valid, 1305 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:43:08,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4673 states. [2022-11-23 15:43:09,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4673 to 4605. [2022-11-23 15:43:09,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4605 states, 3272 states have (on average 1.4734107579462103) internal successors, (4821), 3486 states have internal predecessors, (4821), 1033 states have call successors, (1033), 252 states have call predecessors, (1033), 299 states have return successors, (1482), 998 states have call predecessors, (1482), 1028 states have call successors, (1482) [2022-11-23 15:43:09,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4605 states to 4605 states and 7336 transitions. [2022-11-23 15:43:09,315 INFO L78 Accepts]: Start accepts. Automaton has 4605 states and 7336 transitions. Word has length 118 [2022-11-23 15:43:09,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:43:09,315 INFO L495 AbstractCegarLoop]: Abstraction has 4605 states and 7336 transitions. [2022-11-23 15:43:09,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 3 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) [2022-11-23 15:43:09,316 INFO L276 IsEmpty]: Start isEmpty. Operand 4605 states and 7336 transitions. [2022-11-23 15:43:09,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-11-23 15:43:09,337 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:43:09,337 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:43:09,351 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3802908-971f-401b-9007-69d641077922/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-23 15:43:09,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3802908-971f-401b-9007-69d641077922/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:43:09,546 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:43:09,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:43:09,546 INFO L85 PathProgramCache]: Analyzing trace with hash -31349416, now seen corresponding path program 1 times [2022-11-23 15:43:09,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:43:09,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267194793] [2022-11-23 15:43:09,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:43:09,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:43:09,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:43:10,006 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 25 proven. 3 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-23 15:43:10,006 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:43:10,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267194793] [2022-11-23 15:43:10,006 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267194793] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:43:10,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [416689024] [2022-11-23 15:43:10,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:43:10,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:43:10,007 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3802908-971f-401b-9007-69d641077922/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:43:10,011 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3802908-971f-401b-9007-69d641077922/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:43:10,034 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3802908-971f-401b-9007-69d641077922/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-23 15:43:10,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:43:10,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 1889 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-23 15:43:10,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:43:10,496 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-23 15:43:10,497 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:43:10,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [416689024] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:43:10,497 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 15:43:10,497 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 10 [2022-11-23 15:43:10,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16988118] [2022-11-23 15:43:10,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:43:10,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 15:43:10,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:43:10,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 15:43:10,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-23 15:43:10,500 INFO L87 Difference]: Start difference. First operand 4605 states and 7336 transitions. Second operand has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 4 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2022-11-23 15:43:12,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:43:12,106 INFO L93 Difference]: Finished difference Result 9235 states and 15075 transitions. [2022-11-23 15:43:12,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 15:43:12,107 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 4 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) Word has length 123 [2022-11-23 15:43:12,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:43:12,144 INFO L225 Difference]: With dead ends: 9235 [2022-11-23 15:43:12,144 INFO L226 Difference]: Without dead ends: 5475 [2022-11-23 15:43:12,170 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2022-11-23 15:43:12,171 INFO L413 NwaCegarLoop]: 598 mSDtfsCounter, 671 mSDsluCounter, 574 mSDsCounter, 0 mSdLazyCounter, 604 mSolverCounterSat, 162 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 726 SdHoareTripleChecker+Valid, 1172 SdHoareTripleChecker+Invalid, 766 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 162 IncrementalHoareTripleChecker+Valid, 604 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-23 15:43:12,172 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [726 Valid, 1172 Invalid, 766 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [162 Valid, 604 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-23 15:43:12,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5475 states. [2022-11-23 15:43:12,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5475 to 5359. [2022-11-23 15:43:12,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5359 states, 3708 states have (on average 1.4684466019417475) internal successors, (5445), 3968 states have internal predecessors, (5445), 1288 states have call successors, (1288), 324 states have call predecessors, (1288), 362 states have return successors, (1784), 1246 states have call predecessors, (1784), 1281 states have call successors, (1784) [2022-11-23 15:43:12,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5359 states to 5359 states and 8517 transitions. [2022-11-23 15:43:12,831 INFO L78 Accepts]: Start accepts. Automaton has 5359 states and 8517 transitions. Word has length 123 [2022-11-23 15:43:12,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:43:12,831 INFO L495 AbstractCegarLoop]: Abstraction has 5359 states and 8517 transitions. [2022-11-23 15:43:12,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 4 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2022-11-23 15:43:12,832 INFO L276 IsEmpty]: Start isEmpty. Operand 5359 states and 8517 transitions. [2022-11-23 15:43:12,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-23 15:43:12,842 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:43:12,843 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:43:12,857 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3802908-971f-401b-9007-69d641077922/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-23 15:43:13,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3802908-971f-401b-9007-69d641077922/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-23 15:43:13,051 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:43:13,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:43:13,052 INFO L85 PathProgramCache]: Analyzing trace with hash 1200837506, now seen corresponding path program 1 times [2022-11-23 15:43:13,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:43:13,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454117804] [2022-11-23 15:43:13,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:43:13,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:43:13,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:43:13,489 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 19 proven. 3 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-23 15:43:13,489 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:43:13,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454117804] [2022-11-23 15:43:13,490 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454117804] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:43:13,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720401879] [2022-11-23 15:43:13,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:43:13,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:43:13,491 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3802908-971f-401b-9007-69d641077922/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:43:13,492 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3802908-971f-401b-9007-69d641077922/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:43:13,518 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3802908-971f-401b-9007-69d641077922/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-23 15:43:13,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:43:13,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 1891 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-23 15:43:13,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:43:14,021 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-23 15:43:14,021 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:43:14,021 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [720401879] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:43:14,021 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 15:43:14,022 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 10 [2022-11-23 15:43:14,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582110538] [2022-11-23 15:43:14,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:43:14,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 15:43:14,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:43:14,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 15:43:14,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-23 15:43:14,024 INFO L87 Difference]: Start difference. First operand 5359 states and 8517 transitions. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 4 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2022-11-23 15:43:15,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:43:15,914 INFO L93 Difference]: Finished difference Result 12851 states and 20864 transitions. [2022-11-23 15:43:15,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 15:43:15,915 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 4 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) Word has length 124 [2022-11-23 15:43:15,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:43:15,978 INFO L225 Difference]: With dead ends: 12851 [2022-11-23 15:43:15,979 INFO L226 Difference]: Without dead ends: 8315 [2022-11-23 15:43:16,026 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2022-11-23 15:43:16,027 INFO L413 NwaCegarLoop]: 851 mSDtfsCounter, 551 mSDsluCounter, 758 mSDsCounter, 0 mSdLazyCounter, 729 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 611 SdHoareTripleChecker+Valid, 1609 SdHoareTripleChecker+Invalid, 880 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 729 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-23 15:43:16,028 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [611 Valid, 1609 Invalid, 880 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 729 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-23 15:43:16,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8315 states. [2022-11-23 15:43:16,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8315 to 8297. [2022-11-23 15:43:16,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8297 states, 5632 states have (on average 1.4723011363636365) internal successors, (8292), 6066 states have internal predecessors, (8292), 2106 states have call successors, (2106), 518 states have call predecessors, (2106), 558 states have return successors, (2790), 2036 states have call predecessors, (2790), 2095 states have call successors, (2790) [2022-11-23 15:43:17,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8297 states to 8297 states and 13188 transitions. [2022-11-23 15:43:17,021 INFO L78 Accepts]: Start accepts. Automaton has 8297 states and 13188 transitions. Word has length 124 [2022-11-23 15:43:17,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:43:17,025 INFO L495 AbstractCegarLoop]: Abstraction has 8297 states and 13188 transitions. [2022-11-23 15:43:17,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 4 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2022-11-23 15:43:17,026 INFO L276 IsEmpty]: Start isEmpty. Operand 8297 states and 13188 transitions. [2022-11-23 15:43:17,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-11-23 15:43:17,041 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:43:17,041 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:43:17,055 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3802908-971f-401b-9007-69d641077922/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-23 15:43:17,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3802908-971f-401b-9007-69d641077922/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-23 15:43:17,251 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:43:17,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:43:17,252 INFO L85 PathProgramCache]: Analyzing trace with hash -796407116, now seen corresponding path program 1 times [2022-11-23 15:43:17,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:43:17,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973529502] [2022-11-23 15:43:17,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:43:17,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:43:17,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:43:17,841 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 19 proven. 3 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-23 15:43:17,841 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:43:17,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973529502] [2022-11-23 15:43:17,842 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973529502] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:43:17,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261527946] [2022-11-23 15:43:17,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:43:17,843 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:43:17,843 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3802908-971f-401b-9007-69d641077922/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:43:17,844 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3802908-971f-401b-9007-69d641077922/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:43:17,862 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3802908-971f-401b-9007-69d641077922/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-23 15:43:18,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:43:18,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 1892 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-23 15:43:18,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:43:18,430 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-23 15:43:18,431 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:43:18,431 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1261527946] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:43:18,431 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 15:43:18,432 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [8] total 15 [2022-11-23 15:43:18,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710703727] [2022-11-23 15:43:18,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:43:18,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-23 15:43:18,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:43:18,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-23 15:43:18,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2022-11-23 15:43:18,434 INFO L87 Difference]: Start difference. First operand 8297 states and 13188 transitions. Second operand has 9 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 3 states have call successors, (23), 3 states have call predecessors, (23), 5 states have return successors, (21), 5 states have call predecessors, (21), 3 states have call successors, (21) [2022-11-23 15:43:20,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:43:20,960 INFO L93 Difference]: Finished difference Result 20700 states and 33321 transitions. [2022-11-23 15:43:20,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-23 15:43:20,961 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 3 states have call successors, (23), 3 states have call predecessors, (23), 5 states have return successors, (21), 5 states have call predecessors, (21), 3 states have call successors, (21) Word has length 125 [2022-11-23 15:43:20,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:43:21,065 INFO L225 Difference]: With dead ends: 20700 [2022-11-23 15:43:21,065 INFO L226 Difference]: Without dead ends: 13248 [2022-11-23 15:43:21,127 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2022-11-23 15:43:21,128 INFO L413 NwaCegarLoop]: 687 mSDtfsCounter, 656 mSDsluCounter, 3986 mSDsCounter, 0 mSdLazyCounter, 1176 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 715 SdHoareTripleChecker+Valid, 4673 SdHoareTripleChecker+Invalid, 1308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 1176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-23 15:43:21,128 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [715 Valid, 4673 Invalid, 1308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 1176 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-23 15:43:21,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13248 states. [2022-11-23 15:43:22,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13248 to 11769. [2022-11-23 15:43:22,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11769 states, 7932 states have (on average 1.4747856782652546) internal successors, (11698), 8561 states have internal predecessors, (11698), 3063 states have call successors, (3063), 720 states have call predecessors, (3063), 773 states have return successors, (4197), 2979 states have call predecessors, (4197), 3046 states have call successors, (4197) [2022-11-23 15:43:22,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11769 states to 11769 states and 18958 transitions. [2022-11-23 15:43:22,669 INFO L78 Accepts]: Start accepts. Automaton has 11769 states and 18958 transitions. Word has length 125 [2022-11-23 15:43:22,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:43:22,670 INFO L495 AbstractCegarLoop]: Abstraction has 11769 states and 18958 transitions. [2022-11-23 15:43:22,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 3 states have call successors, (23), 3 states have call predecessors, (23), 5 states have return successors, (21), 5 states have call predecessors, (21), 3 states have call successors, (21) [2022-11-23 15:43:22,671 INFO L276 IsEmpty]: Start isEmpty. Operand 11769 states and 18958 transitions. [2022-11-23 15:43:22,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-11-23 15:43:22,684 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:43:22,685 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:43:22,695 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3802908-971f-401b-9007-69d641077922/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-23 15:43:22,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3802908-971f-401b-9007-69d641077922/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-23 15:43:22,895 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:43:22,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:43:22,896 INFO L85 PathProgramCache]: Analyzing trace with hash -684200179, now seen corresponding path program 1 times [2022-11-23 15:43:22,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:43:22,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278553460] [2022-11-23 15:43:22,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:43:22,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:43:22,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:43:23,446 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 25 proven. 3 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-23 15:43:23,446 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:43:23,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278553460] [2022-11-23 15:43:23,447 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278553460] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:43:23,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232631957] [2022-11-23 15:43:23,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:43:23,448 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:43:23,448 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3802908-971f-401b-9007-69d641077922/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:43:23,449 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3802908-971f-401b-9007-69d641077922/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:43:23,485 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3802908-971f-401b-9007-69d641077922/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-23 15:43:23,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:43:23,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 1905 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-23 15:43:23,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:43:24,107 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 55 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-23 15:43:24,107 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:43:24,479 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 29 proven. 2 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-23 15:43:24,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1232631957] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:43:24,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1079755260] [2022-11-23 15:43:24,515 INFO L159 IcfgInterpreter]: Started Sifa with 79 locations of interest [2022-11-23 15:43:24,515 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:43:24,520 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:43:24,527 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:43:24,527 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:43:34,522 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 677 for LOIs [2022-11-23 15:44:25,305 INFO L197 IcfgInterpreter]: Interpreting procedure __automaton_fail with input of size 29 for LOIs [2022-11-23 15:44:25,308 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection with input of size 42 for LOIs [2022-11-23 15:44:25,551 INFO L197 IcfgInterpreter]: Interpreting procedure isTopFloor with input of size 36 for LOIs [2022-11-23 15:44:25,553 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 448 for LOIs [2022-11-23 15:44:25,704 INFO L197 IcfgInterpreter]: Interpreting procedure buttonForFloorIsPressed with input of size 51 for LOIs [2022-11-23 15:44:25,723 INFO L197 IcfgInterpreter]: Interpreting procedure initTopDown with input of size 595 for LOIs [2022-11-23 15:44:27,818 INFO L197 IcfgInterpreter]: Interpreting procedure initFloors with input of size 569 for LOIs [2022-11-23 15:44:28,013 INFO L197 IcfgInterpreter]: Interpreting procedure continueInDirection with input of size 39 for LOIs [2022-11-23 15:44:28,026 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentHeading with input of size 30 for LOIs [2022-11-23 15:44:28,030 INFO L197 IcfgInterpreter]: Interpreting procedure bobCall with input of size 569 for LOIs [2022-11-23 15:44:31,670 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 573 for LOIs [2022-11-23 15:44:32,254 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 501 for LOIs [2022-11-23 15:44:32,395 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:45:09,064 WARN L233 SmtUtils]: Spent 8.05s on a formula simplification. DAG size of input: 641 DAG size of output: 588 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:45:17,157 WARN L233 SmtUtils]: Spent 7.77s on a formula simplification. DAG size of input: 641 DAG size of output: 588 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:45:26,530 WARN L233 SmtUtils]: Spent 5.75s on a formula simplification. DAG size of input: 768 DAG size of output: 590 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:45:47,980 WARN L233 SmtUtils]: Spent 14.70s on a formula simplification. DAG size of input: 677 DAG size of output: 583 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:46:05,599 WARN L233 SmtUtils]: Spent 17.14s on a formula simplification. DAG size of input: 633 DAG size of output: 609 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:46:25,676 WARN L233 SmtUtils]: Spent 19.25s on a formula simplification. DAG size of input: 668 DAG size of output: 615 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:46:44,830 WARN L233 SmtUtils]: Spent 18.58s on a formula simplification. DAG size of input: 668 DAG size of output: 614 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:47:04,895 WARN L233 SmtUtils]: Spent 18.84s on a formula simplification. DAG size of input: 669 DAG size of output: 610 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:47:26,026 WARN L233 SmtUtils]: Spent 19.68s on a formula simplification. DAG size of input: 680 DAG size of output: 614 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:47:45,852 WARN L233 SmtUtils]: Spent 19.16s on a formula simplification. DAG size of input: 667 DAG size of output: 614 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:47:55,783 WARN L233 SmtUtils]: Spent 9.30s on a formula simplification. DAG size of input: 668 DAG size of output: 581 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:48:25,962 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '226889#(and (= ~head~0.offset 0) (= ~currentHeading~0 1) (<= ~floorButtons_0~0 2147483647) (= ~head~0.base 0) (= |#NULL.offset| 0) (= 0 (+ ~expectedDirection~0 1)) (<= 0 (+ ~floorButtons_0~0 2147483648)) (<= 0 |#StackHeapBarrier|) (= ~cleanupTimeShifts~0 12) (= ~currentFloorID~0 1) (= |#NULL.base| 0))' at error location [2022-11-23 15:48:25,962 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 15:48:25,964 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 15:48:25,964 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2022-11-23 15:48:25,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098696801] [2022-11-23 15:48:25,965 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 15:48:25,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-23 15:48:25,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:48:25,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-23 15:48:25,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=492, Invalid=5514, Unknown=0, NotChecked=0, Total=6006 [2022-11-23 15:48:25,969 INFO L87 Difference]: Start difference. First operand 11769 states and 18958 transitions. Second operand has 19 states, 16 states have (on average 7.875) internal successors, (126), 16 states have internal predecessors, (126), 8 states have call successors, (49), 4 states have call predecessors, (49), 10 states have return successors, (48), 11 states have call predecessors, (48), 8 states have call successors, (48) [2022-11-23 15:48:53,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:48:53,387 INFO L93 Difference]: Finished difference Result 55866 states and 98541 transitions. [2022-11-23 15:48:53,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-11-23 15:48:53,388 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 16 states have (on average 7.875) internal successors, (126), 16 states have internal predecessors, (126), 8 states have call successors, (49), 4 states have call predecessors, (49), 10 states have return successors, (48), 11 states have call predecessors, (48), 8 states have call successors, (48) Word has length 127 [2022-11-23 15:48:53,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:48:53,744 INFO L225 Difference]: With dead ends: 55866 [2022-11-23 15:48:53,744 INFO L226 Difference]: Without dead ends: 39176 [2022-11-23 15:48:54,018 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 512 GetRequests, 333 SyntacticMatches, 12 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11647 ImplicationChecksByTransitivity, 237.0s TimeCoverageRelationStatistics Valid=1590, Invalid=26802, Unknown=0, NotChecked=0, Total=28392 [2022-11-23 15:48:54,019 INFO L413 NwaCegarLoop]: 823 mSDtfsCounter, 6061 mSDsluCounter, 7059 mSDsCounter, 0 mSdLazyCounter, 20310 mSolverCounterSat, 3941 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6213 SdHoareTripleChecker+Valid, 7882 SdHoareTripleChecker+Invalid, 24251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 3941 IncrementalHoareTripleChecker+Valid, 20310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.3s IncrementalHoareTripleChecker+Time [2022-11-23 15:48:54,020 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6213 Valid, 7882 Invalid, 24251 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [3941 Valid, 20310 Invalid, 0 Unknown, 0 Unchecked, 18.3s Time] [2022-11-23 15:48:54,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39176 states. [2022-11-23 15:48:57,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39176 to 30596. [2022-11-23 15:48:58,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30596 states, 20767 states have (on average 1.4646313863340876) internal successors, (30416), 22626 states have internal predecessors, (30416), 7923 states have call successors, (7923), 1659 states have call predecessors, (7923), 1905 states have return successors, (12987), 7322 states have call predecessors, (12987), 7895 states have call successors, (12987) [2022-11-23 15:48:58,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30596 states to 30596 states and 51326 transitions. [2022-11-23 15:48:59,005 INFO L78 Accepts]: Start accepts. Automaton has 30596 states and 51326 transitions. Word has length 127 [2022-11-23 15:48:59,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:48:59,005 INFO L495 AbstractCegarLoop]: Abstraction has 30596 states and 51326 transitions. [2022-11-23 15:48:59,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 16 states have (on average 7.875) internal successors, (126), 16 states have internal predecessors, (126), 8 states have call successors, (49), 4 states have call predecessors, (49), 10 states have return successors, (48), 11 states have call predecessors, (48), 8 states have call successors, (48) [2022-11-23 15:48:59,006 INFO L276 IsEmpty]: Start isEmpty. Operand 30596 states and 51326 transitions. [2022-11-23 15:48:59,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-11-23 15:48:59,027 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:48:59,027 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:48:59,043 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3802908-971f-401b-9007-69d641077922/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-23 15:48:59,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3802908-971f-401b-9007-69d641077922/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-23 15:48:59,237 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:48:59,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:48:59,237 INFO L85 PathProgramCache]: Analyzing trace with hash 796176557, now seen corresponding path program 1 times [2022-11-23 15:48:59,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:48:59,238 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699069323] [2022-11-23 15:48:59,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:48:59,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:48:59,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:49:00,090 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-23 15:49:00,090 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:49:00,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699069323] [2022-11-23 15:49:00,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699069323] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:49:00,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60964349] [2022-11-23 15:49:00,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:49:00,091 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:49:00,091 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3802908-971f-401b-9007-69d641077922/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:49:00,093 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3802908-971f-401b-9007-69d641077922/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:49:00,114 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3802908-971f-401b-9007-69d641077922/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-23 15:49:00,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:49:00,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 1708 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-23 15:49:00,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:49:00,644 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-23 15:49:00,644 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:49:00,644 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [60964349] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:49:00,644 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 15:49:00,645 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10] total 12 [2022-11-23 15:49:00,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477760223] [2022-11-23 15:49:00,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:49:00,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 15:49:00,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:49:00,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 15:49:00,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2022-11-23 15:49:00,649 INFO L87 Difference]: Start difference. First operand 30596 states and 51326 transitions. Second operand has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 4 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) [2022-11-23 15:49:04,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:49:04,692 INFO L93 Difference]: Finished difference Result 61840 states and 106531 transitions. [2022-11-23 15:49:04,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 15:49:04,693 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 4 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) Word has length 136 [2022-11-23 15:49:04,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:49:04,949 INFO L225 Difference]: With dead ends: 61840 [2022-11-23 15:49:04,950 INFO L226 Difference]: Without dead ends: 28547 [2022-11-23 15:49:05,561 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2022-11-23 15:49:05,562 INFO L413 NwaCegarLoop]: 604 mSDtfsCounter, 183 mSDsluCounter, 944 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 1548 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 15:49:05,562 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [193 Valid, 1548 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 15:49:05,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28547 states. [2022-11-23 15:49:09,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28547 to 28490. [2022-11-23 15:49:09,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28490 states, 19021 states have (on average 1.4515535460806477) internal successors, (27610), 20855 states have internal predecessors, (27610), 7636 states have call successors, (7636), 1614 states have call predecessors, (7636), 1832 states have return successors, (12346), 7032 states have call predecessors, (12346), 7608 states have call successors, (12346) [2022-11-23 15:49:09,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28490 states to 28490 states and 47592 transitions. [2022-11-23 15:49:09,725 INFO L78 Accepts]: Start accepts. Automaton has 28490 states and 47592 transitions. Word has length 136 [2022-11-23 15:49:09,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:49:09,726 INFO L495 AbstractCegarLoop]: Abstraction has 28490 states and 47592 transitions. [2022-11-23 15:49:09,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 4 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) [2022-11-23 15:49:09,726 INFO L276 IsEmpty]: Start isEmpty. Operand 28490 states and 47592 transitions. [2022-11-23 15:49:09,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-11-23 15:49:09,747 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:49:09,747 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:49:09,764 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3802908-971f-401b-9007-69d641077922/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-23 15:49:09,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3802908-971f-401b-9007-69d641077922/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-23 15:49:09,958 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:49:09,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:49:09,958 INFO L85 PathProgramCache]: Analyzing trace with hash -1304544567, now seen corresponding path program 1 times [2022-11-23 15:49:09,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:49:09,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918654700] [2022-11-23 15:49:09,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:49:09,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:49:09,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:49:10,614 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-23 15:49:10,614 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:49:10,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918654700] [2022-11-23 15:49:10,615 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918654700] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:49:10,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558524507] [2022-11-23 15:49:10,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:49:10,615 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:49:10,616 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3802908-971f-401b-9007-69d641077922/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:49:10,617 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3802908-971f-401b-9007-69d641077922/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:49:10,619 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3802908-971f-401b-9007-69d641077922/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-23 15:49:11,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:49:11,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 1712 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-23 15:49:11,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:49:11,476 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 20 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-23 15:49:11,476 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:49:12,088 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-23 15:49:12,089 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [558524507] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:49:12,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1175549732] [2022-11-23 15:49:12,094 INFO L159 IcfgInterpreter]: Started Sifa with 119 locations of interest [2022-11-23 15:49:12,094 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:49:12,095 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:49:12,095 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:49:12,096 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:49:17,137 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 566 for LOIs [2022-11-23 15:49:23,600 INFO L197 IcfgInterpreter]: Interpreting procedure buttonForFloorIsPressed with input of size 491 for LOIs [2022-11-23 15:49:24,027 INFO L197 IcfgInterpreter]: Interpreting procedure initTopDown with input of size 595 for LOIs [2022-11-23 15:49:26,405 INFO L197 IcfgInterpreter]: Interpreting procedure initFloors with input of size 569 for LOIs [2022-11-23 15:49:26,636 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentHeading with input of size 433 for LOIs [2022-11-23 15:49:26,720 INFO L197 IcfgInterpreter]: Interpreting procedure bobCall with input of size 569 for LOIs [2022-11-23 15:49:30,742 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 573 for LOIs [2022-11-23 15:49:31,424 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 501 for LOIs [2022-11-23 15:49:31,588 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:49:36,874 WARN L233 SmtUtils]: Spent 5.08s on a formula simplification. DAG size of input: 510 DAG size of output: 505 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:49:54,511 WARN L233 SmtUtils]: Spent 5.17s on a formula simplification. DAG size of input: 509 DAG size of output: 506 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:50:02,595 WARN L233 SmtUtils]: Spent 5.04s on a formula simplification. DAG size of input: 541 DAG size of output: 508 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:50:11,383 WARN L233 SmtUtils]: Spent 8.43s on a formula simplification. DAG size of input: 641 DAG size of output: 588 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:50:20,172 WARN L233 SmtUtils]: Spent 8.41s on a formula simplification. DAG size of input: 641 DAG size of output: 588 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:50:30,662 WARN L233 SmtUtils]: Spent 6.35s on a formula simplification. DAG size of input: 768 DAG size of output: 590 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:50:47,230 WARN L233 SmtUtils]: Spent 5.90s on a formula simplification. DAG size of input: 579 DAG size of output: 574 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:50:59,237 WARN L233 SmtUtils]: Spent 7.11s on a formula simplification. DAG size of input: 618 DAG size of output: 589 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:51:06,866 WARN L233 SmtUtils]: Spent 7.15s on a formula simplification. DAG size of input: 618 DAG size of output: 589 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:51:13,490 WARN L233 SmtUtils]: Spent 6.09s on a formula simplification. DAG size of input: 491 DAG size of output: 464 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:51:20,390 WARN L233 SmtUtils]: Spent 6.33s on a formula simplification. DAG size of input: 527 DAG size of output: 471 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:51:28,137 WARN L233 SmtUtils]: Spent 7.21s on a formula simplification. DAG size of input: 622 DAG size of output: 591 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:51:35,845 WARN L233 SmtUtils]: Spent 7.15s on a formula simplification. DAG size of input: 622 DAG size of output: 592 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:51:44,920 WARN L233 SmtUtils]: Spent 7.34s on a formula simplification. DAG size of input: 625 DAG size of output: 593 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:51:52,773 WARN L233 SmtUtils]: Spent 7.26s on a formula simplification. DAG size of input: 623 DAG size of output: 593 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:51:52,780 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1175549732] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:51:52,780 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-23 15:51:52,781 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [10, 6, 7] total 42 [2022-11-23 15:51:52,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547416275] [2022-11-23 15:51:52,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:51:52,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-23 15:51:52,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:51:52,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-23 15:51:52,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=1525, Unknown=0, NotChecked=0, Total=1722 [2022-11-23 15:51:52,784 INFO L87 Difference]: Start difference. First operand 28490 states and 47592 transitions. Second operand has 27 states, 20 states have (on average 4.15) internal successors, (83), 15 states have internal predecessors, (83), 10 states have call successors, (24), 8 states have call predecessors, (24), 8 states have return successors, (22), 9 states have call predecessors, (22), 9 states have call successors, (22) [2022-11-23 15:52:01,280 WARN L233 SmtUtils]: Spent 7.25s on a formula simplification. DAG size of input: 606 DAG size of output: 571 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:52:09,069 WARN L233 SmtUtils]: Spent 7.44s on a formula simplification. DAG size of input: 612 DAG size of output: 577 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:52:16,478 WARN L233 SmtUtils]: Spent 6.08s on a formula simplification. DAG size of input: 587 DAG size of output: 570 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:52:24,772 WARN L233 SmtUtils]: Spent 7.51s on a formula simplification. DAG size of input: 618 DAG size of output: 586 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:52:32,599 WARN L233 SmtUtils]: Spent 7.49s on a formula simplification. DAG size of input: 624 DAG size of output: 592 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:53:13,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:53:13,650 INFO L93 Difference]: Finished difference Result 57090 states and 95354 transitions. [2022-11-23 15:53:13,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-23 15:53:13,651 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 20 states have (on average 4.15) internal successors, (83), 15 states have internal predecessors, (83), 10 states have call successors, (24), 8 states have call predecessors, (24), 8 states have return successors, (22), 9 states have call predecessors, (22), 9 states have call successors, (22) Word has length 140 [2022-11-23 15:53:13,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:53:13,913 INFO L225 Difference]: With dead ends: 57090 [2022-11-23 15:53:13,913 INFO L226 Difference]: Without dead ends: 28612 [2022-11-23 15:53:14,208 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 434 GetRequests, 383 SyntacticMatches, 6 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 424 ImplicationChecksByTransitivity, 178.4s TimeCoverageRelationStatistics Valid=238, Invalid=1924, Unknown=0, NotChecked=0, Total=2162 [2022-11-23 15:53:14,209 INFO L413 NwaCegarLoop]: 570 mSDtfsCounter, 141 mSDsluCounter, 4376 mSDsCounter, 0 mSdLazyCounter, 6216 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 39.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 4946 SdHoareTripleChecker+Invalid, 6258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 6216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 41.0s IncrementalHoareTripleChecker+Time [2022-11-23 15:53:14,209 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [155 Valid, 4946 Invalid, 6258 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [42 Valid, 6216 Invalid, 0 Unknown, 0 Unchecked, 41.0s Time] [2022-11-23 15:53:14,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28612 states. [2022-11-23 15:53:17,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28612 to 28533. [2022-11-23 15:53:17,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28533 states, 19054 states have (on average 1.45098142122389) internal successors, (27647), 20887 states have internal predecessors, (27647), 7642 states have call successors, (7642), 1619 states have call predecessors, (7642), 1836 states have return successors, (12348), 7038 states have call predecessors, (12348), 7614 states have call successors, (12348) [2022-11-23 15:53:17,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28533 states to 28533 states and 47637 transitions. [2022-11-23 15:53:17,738 INFO L78 Accepts]: Start accepts. Automaton has 28533 states and 47637 transitions. Word has length 140 [2022-11-23 15:53:17,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:53:17,739 INFO L495 AbstractCegarLoop]: Abstraction has 28533 states and 47637 transitions. [2022-11-23 15:53:17,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 20 states have (on average 4.15) internal successors, (83), 15 states have internal predecessors, (83), 10 states have call successors, (24), 8 states have call predecessors, (24), 8 states have return successors, (22), 9 states have call predecessors, (22), 9 states have call successors, (22) [2022-11-23 15:53:17,739 INFO L276 IsEmpty]: Start isEmpty. Operand 28533 states and 47637 transitions. [2022-11-23 15:53:17,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2022-11-23 15:53:17,756 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:53:17,757 INFO L195 NwaCegarLoop]: trace histogram [7, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:53:17,772 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3802908-971f-401b-9007-69d641077922/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-11-23 15:53:17,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3802908-971f-401b-9007-69d641077922/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-23 15:53:17,973 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:53:17,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:53:17,974 INFO L85 PathProgramCache]: Analyzing trace with hash 743065958, now seen corresponding path program 1 times [2022-11-23 15:53:17,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:53:17,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653747536] [2022-11-23 15:53:17,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:53:17,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:53:18,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:53:19,288 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 20 proven. 3 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2022-11-23 15:53:19,289 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:53:19,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653747536] [2022-11-23 15:53:19,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653747536] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:53:19,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967905226] [2022-11-23 15:53:19,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:53:19,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:53:19,289 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3802908-971f-401b-9007-69d641077922/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:53:19,291 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3802908-971f-401b-9007-69d641077922/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:53:19,302 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3802908-971f-401b-9007-69d641077922/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-23 15:53:19,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:53:19,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 1925 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-23 15:53:19,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:53:19,866 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-23 15:53:19,866 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:53:19,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [967905226] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:53:19,867 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 15:53:19,867 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [18] total 24 [2022-11-23 15:53:19,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036337618] [2022-11-23 15:53:19,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:53:19,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-23 15:53:19,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:53:19,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-23 15:53:19,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2022-11-23 15:53:19,869 INFO L87 Difference]: Start difference. First operand 28533 states and 47637 transitions. Second operand has 8 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 3 states have call successors, (24), 3 states have call predecessors, (24), 5 states have return successors, (23), 4 states have call predecessors, (23), 3 states have call successors, (23) [2022-11-23 15:53:24,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:53:24,495 INFO L93 Difference]: Finished difference Result 54919 states and 92243 transitions. [2022-11-23 15:53:24,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-23 15:53:24,496 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 3 states have call successors, (24), 3 states have call predecessors, (24), 5 states have return successors, (23), 4 states have call predecessors, (23), 3 states have call successors, (23) Word has length 139 [2022-11-23 15:53:24,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:53:24,678 INFO L225 Difference]: With dead ends: 54919 [2022-11-23 15:53:24,679 INFO L226 Difference]: Without dead ends: 27832 [2022-11-23 15:53:24,887 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=80, Invalid=676, Unknown=0, NotChecked=0, Total=756 [2022-11-23 15:53:24,887 INFO L413 NwaCegarLoop]: 935 mSDtfsCounter, 590 mSDsluCounter, 3566 mSDsCounter, 0 mSdLazyCounter, 1961 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 652 SdHoareTripleChecker+Valid, 4501 SdHoareTripleChecker+Invalid, 2105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 1961 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-23 15:53:24,887 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [652 Valid, 4501 Invalid, 2105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 1961 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-23 15:53:24,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27832 states. [2022-11-23 15:53:27,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27832 to 26215. [2022-11-23 15:53:27,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26215 states, 17570 states have (on average 1.4516220830961868) internal successors, (25505), 19194 states have internal predecessors, (25505), 6835 states have call successors, (6835), 1599 states have call predecessors, (6835), 1809 states have return successors, (10690), 6347 states have call predecessors, (10690), 6799 states have call successors, (10690) [2022-11-23 15:53:27,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26215 states to 26215 states and 43030 transitions. [2022-11-23 15:53:27,604 INFO L78 Accepts]: Start accepts. Automaton has 26215 states and 43030 transitions. Word has length 139 [2022-11-23 15:53:27,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:53:27,605 INFO L495 AbstractCegarLoop]: Abstraction has 26215 states and 43030 transitions. [2022-11-23 15:53:27,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 3 states have call successors, (24), 3 states have call predecessors, (24), 5 states have return successors, (23), 4 states have call predecessors, (23), 3 states have call successors, (23) [2022-11-23 15:53:27,605 INFO L276 IsEmpty]: Start isEmpty. Operand 26215 states and 43030 transitions. [2022-11-23 15:53:27,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-11-23 15:53:27,616 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:53:27,616 INFO L195 NwaCegarLoop]: trace histogram [7, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:53:27,633 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3802908-971f-401b-9007-69d641077922/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-23 15:53:27,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3802908-971f-401b-9007-69d641077922/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:53:27,827 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:53:27,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:53:27,828 INFO L85 PathProgramCache]: Analyzing trace with hash 859914875, now seen corresponding path program 1 times [2022-11-23 15:53:27,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:53:27,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609982426] [2022-11-23 15:53:27,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:53:27,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:53:27,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:53:29,096 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 20 proven. 3 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-11-23 15:53:29,096 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:53:29,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609982426] [2022-11-23 15:53:29,096 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609982426] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:53:29,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156392743] [2022-11-23 15:53:29,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:53:29,097 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:53:29,097 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3802908-971f-401b-9007-69d641077922/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:53:29,098 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3802908-971f-401b-9007-69d641077922/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:53:29,104 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3802908-971f-401b-9007-69d641077922/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-23 15:53:29,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:53:29,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 1940 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-23 15:53:29,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:53:29,681 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-23 15:53:29,681 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:53:29,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1156392743] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:53:29,681 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 15:53:29,682 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [18] total 24 [2022-11-23 15:53:29,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665699050] [2022-11-23 15:53:29,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:53:29,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-23 15:53:29,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:53:29,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-23 15:53:29,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=491, Unknown=0, NotChecked=0, Total=552 [2022-11-23 15:53:29,683 INFO L87 Difference]: Start difference. First operand 26215 states and 43030 transitions. Second operand has 8 states, 7 states have (on average 12.142857142857142) internal successors, (85), 7 states have internal predecessors, (85), 3 states have call successors, (25), 3 states have call predecessors, (25), 5 states have return successors, (24), 4 states have call predecessors, (24), 3 states have call successors, (24) [2022-11-23 15:53:34,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:53:34,166 INFO L93 Difference]: Finished difference Result 51047 states and 83487 transitions. [2022-11-23 15:53:34,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-23 15:53:34,167 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 12.142857142857142) internal successors, (85), 7 states have internal predecessors, (85), 3 states have call successors, (25), 3 states have call predecessors, (25), 5 states have return successors, (24), 4 states have call predecessors, (24), 3 states have call successors, (24) Word has length 142 [2022-11-23 15:53:34,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:53:34,340 INFO L225 Difference]: With dead ends: 51047 [2022-11-23 15:53:34,340 INFO L226 Difference]: Without dead ends: 26316 [2022-11-23 15:53:34,468 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=77, Invalid=679, Unknown=0, NotChecked=0, Total=756 [2022-11-23 15:53:34,469 INFO L413 NwaCegarLoop]: 941 mSDtfsCounter, 551 mSDsluCounter, 3950 mSDsCounter, 0 mSdLazyCounter, 1749 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 607 SdHoareTripleChecker+Valid, 4891 SdHoareTripleChecker+Invalid, 1875 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 1749 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-23 15:53:34,469 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [607 Valid, 4891 Invalid, 1875 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 1749 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-23 15:53:34,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26316 states. [2022-11-23 15:53:37,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26316 to 26277. [2022-11-23 15:53:37,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26277 states, 17630 states have (on average 1.4500850822461713) internal successors, (25565), 19226 states have internal predecessors, (25565), 6837 states have call successors, (6837), 1629 states have call predecessors, (6837), 1809 states have return successors, (10634), 6347 states have call predecessors, (10634), 6801 states have call successors, (10634) [2022-11-23 15:53:37,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26277 states to 26277 states and 43036 transitions. [2022-11-23 15:53:37,364 INFO L78 Accepts]: Start accepts. Automaton has 26277 states and 43036 transitions. Word has length 142 [2022-11-23 15:53:37,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:53:37,365 INFO L495 AbstractCegarLoop]: Abstraction has 26277 states and 43036 transitions. [2022-11-23 15:53:37,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 12.142857142857142) internal successors, (85), 7 states have internal predecessors, (85), 3 states have call successors, (25), 3 states have call predecessors, (25), 5 states have return successors, (24), 4 states have call predecessors, (24), 3 states have call successors, (24) [2022-11-23 15:53:37,366 INFO L276 IsEmpty]: Start isEmpty. Operand 26277 states and 43036 transitions. [2022-11-23 15:53:37,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-11-23 15:53:37,378 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:53:37,378 INFO L195 NwaCegarLoop]: trace histogram [7, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:53:37,396 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3802908-971f-401b-9007-69d641077922/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-23 15:53:37,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3802908-971f-401b-9007-69d641077922/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:53:37,588 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:53:37,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:53:37,589 INFO L85 PathProgramCache]: Analyzing trace with hash -936881311, now seen corresponding path program 1 times [2022-11-23 15:53:37,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:53:37,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263023818] [2022-11-23 15:53:37,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:53:37,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:53:37,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:53:38,851 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 24 proven. 3 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-11-23 15:53:38,851 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:53:38,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263023818] [2022-11-23 15:53:38,852 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263023818] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:53:38,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432767897] [2022-11-23 15:53:38,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:53:38,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:53:38,852 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3802908-971f-401b-9007-69d641077922/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:53:38,854 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3802908-971f-401b-9007-69d641077922/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:53:38,856 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3802908-971f-401b-9007-69d641077922/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-23 15:53:39,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:53:39,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 1939 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-23 15:53:39,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:53:39,300 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-23 15:53:39,300 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:53:39,301 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1432767897] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:53:39,301 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 15:53:39,301 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [18] total 19 [2022-11-23 15:53:39,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33751804] [2022-11-23 15:53:39,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:53:39,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:53:39,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:53:39,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:53:39,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2022-11-23 15:53:39,303 INFO L87 Difference]: Start difference. First operand 26277 states and 43036 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2022-11-23 15:53:42,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:53:42,484 INFO L93 Difference]: Finished difference Result 48002 states and 80266 transitions. [2022-11-23 15:53:42,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:53:42,484 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) Word has length 142 [2022-11-23 15:53:42,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:53:42,666 INFO L225 Difference]: With dead ends: 48002 [2022-11-23 15:53:42,666 INFO L226 Difference]: Without dead ends: 23161 [2022-11-23 15:53:42,943 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2022-11-23 15:53:42,943 INFO L413 NwaCegarLoop]: 722 mSDtfsCounter, 100 mSDsluCounter, 566 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 1288 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:53:42,944 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [158 Valid, 1288 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:53:42,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23161 states. [2022-11-23 15:53:45,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23161 to 22950. [2022-11-23 15:53:45,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22950 states, 15479 states have (on average 1.438594224433103) internal successors, (22268), 16810 states have internal predecessors, (22268), 5869 states have call successors, (5869), 1446 states have call predecessors, (5869), 1601 states have return successors, (9115), 5455 states have call predecessors, (9115), 5833 states have call successors, (9115) [2022-11-23 15:53:45,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22950 states to 22950 states and 37252 transitions. [2022-11-23 15:53:45,439 INFO L78 Accepts]: Start accepts. Automaton has 22950 states and 37252 transitions. Word has length 142 [2022-11-23 15:53:45,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:53:45,439 INFO L495 AbstractCegarLoop]: Abstraction has 22950 states and 37252 transitions. [2022-11-23 15:53:45,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2022-11-23 15:53:45,440 INFO L276 IsEmpty]: Start isEmpty. Operand 22950 states and 37252 transitions. [2022-11-23 15:53:45,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-11-23 15:53:45,448 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:53:45,448 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:53:45,455 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3802908-971f-401b-9007-69d641077922/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-23 15:53:45,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3802908-971f-401b-9007-69d641077922/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-11-23 15:53:45,649 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:53:45,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:53:45,649 INFO L85 PathProgramCache]: Analyzing trace with hash -2037759763, now seen corresponding path program 1 times [2022-11-23 15:53:45,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:53:45,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770433603] [2022-11-23 15:53:45,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:53:45,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:53:45,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:53:45,843 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-23 15:53:45,843 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:53:45,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770433603] [2022-11-23 15:53:45,844 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770433603] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:53:45,844 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:53:45,844 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 15:53:45,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278631263] [2022-11-23 15:53:45,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:53:45,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 15:53:45,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:53:45,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 15:53:45,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 15:53:45,846 INFO L87 Difference]: Start difference. First operand 22950 states and 37252 transitions. Second operand has 5 states, 5 states have (on average 17.4) internal successors, (87), 4 states have internal predecessors, (87), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 3 states have call predecessors, (23), 2 states have call successors, (23)