./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec14_product28.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 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_36a47a94-6bc7-46f9-a147-d1e81b2bbda2/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a47a94-6bc7-46f9-a147-d1e81b2bbda2/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a47a94-6bc7-46f9-a147-d1e81b2bbda2/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a47a94-6bc7-46f9-a147-d1e81b2bbda2/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec14_product28.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a47a94-6bc7-46f9-a147-d1e81b2bbda2/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a47a94-6bc7-46f9-a147-d1e81b2bbda2/bin/utaipan-gh47qXpMRh --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash da76b57a1451220816a27c40b8cda655a945b2081fe69d46a431c484896fab87 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-14 13:02:48,210 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 13:02:48,213 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 13:02:48,235 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 13:02:48,236 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 13:02:48,237 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 13:02:48,239 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 13:02:48,242 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 13:02:48,244 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 13:02:48,246 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 13:02:48,247 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 13:02:48,248 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 13:02:48,249 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 13:02:48,250 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 13:02:48,252 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 13:02:48,254 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 13:02:48,255 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 13:02:48,256 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 13:02:48,257 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 13:02:48,258 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 13:02:48,259 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 13:02:48,260 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 13:02:48,261 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 13:02:48,261 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 13:02:48,263 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 13:02:48,263 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 13:02:48,263 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 13:02:48,264 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 13:02:48,264 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 13:02:48,265 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 13:02:48,265 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 13:02:48,265 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 13:02:48,266 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 13:02:48,266 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 13:02:48,267 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 13:02:48,267 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 13:02:48,267 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 13:02:48,267 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 13:02:48,267 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 13:02:48,268 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 13:02:48,268 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 13:02:48,269 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a47a94-6bc7-46f9-a147-d1e81b2bbda2/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 13:02:48,288 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 13:02:48,288 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 13:02:48,289 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 13:02:48,289 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 13:02:48,289 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 13:02:48,289 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 13:02:48,289 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 13:02:48,290 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 13:02:48,290 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 13:02:48,290 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 13:02:48,290 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 13:02:48,290 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 13:02:48,290 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 13:02:48,290 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 13:02:48,290 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 13:02:48,291 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 13:02:48,291 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 13:02:48,291 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 13:02:48,291 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 13:02:48,292 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 13:02:48,292 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 13:02:48,292 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 13:02:48,292 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 13:02:48,292 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 13:02:48,292 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 13:02:48,292 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 13:02:48,292 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 13:02:48,293 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 13:02:48,293 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 13:02:48,293 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 13:02:48,293 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 13:02:48,293 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 13:02:48,293 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 13:02:48,293 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 13:02:48,294 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 13:02:48,294 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 13:02:48,294 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 13:02:48,294 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 13:02:48,294 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 13:02:48,294 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 13:02:48,294 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 13:02:48,294 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_36a47a94-6bc7-46f9-a147-d1e81b2bbda2/bin/utaipan-gh47qXpMRh/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a47a94-6bc7-46f9-a147-d1e81b2bbda2/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> da76b57a1451220816a27c40b8cda655a945b2081fe69d46a431c484896fab87 [2022-12-14 13:02:48,489 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 13:02:48,508 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 13:02:48,511 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 13:02:48,512 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 13:02:48,512 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 13:02:48,513 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a47a94-6bc7-46f9-a147-d1e81b2bbda2/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/product-lines/elevator_spec14_product28.cil.c [2022-12-14 13:02:51,098 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 13:02:51,292 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 13:02:51,292 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a47a94-6bc7-46f9-a147-d1e81b2bbda2/sv-benchmarks/c/product-lines/elevator_spec14_product28.cil.c [2022-12-14 13:02:51,305 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a47a94-6bc7-46f9-a147-d1e81b2bbda2/bin/utaipan-gh47qXpMRh/data/f4aea75dd/8aa91773587f4849aaebeb33e6374624/FLAG3a46398d6 [2022-12-14 13:02:51,316 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a47a94-6bc7-46f9-a147-d1e81b2bbda2/bin/utaipan-gh47qXpMRh/data/f4aea75dd/8aa91773587f4849aaebeb33e6374624 [2022-12-14 13:02:51,318 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 13:02:51,319 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 13:02:51,320 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 13:02:51,320 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 13:02:51,323 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 13:02:51,323 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 01:02:51" (1/1) ... [2022-12-14 13:02:51,324 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5e64b505 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:02:51, skipping insertion in model container [2022-12-14 13:02:51,324 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 01:02:51" (1/1) ... [2022-12-14 13:02:51,331 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 13:02:51,383 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 13:02:51,662 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_36a47a94-6bc7-46f9-a147-d1e81b2bbda2/sv-benchmarks/c/product-lines/elevator_spec14_product28.cil.c[43703,43716] [2022-12-14 13:02:51,774 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 13:02:51,786 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 13:02:51,854 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_36a47a94-6bc7-46f9-a147-d1e81b2bbda2/sv-benchmarks/c/product-lines/elevator_spec14_product28.cil.c[43703,43716] [2022-12-14 13:02:51,879 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 13:02:51,895 INFO L208 MainTranslator]: Completed translation [2022-12-14 13:02:51,896 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:02:51 WrapperNode [2022-12-14 13:02:51,896 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 13:02:51,896 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 13:02:51,897 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 13:02:51,897 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 13:02:51,902 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:02:51" (1/1) ... [2022-12-14 13:02:51,917 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:02:51" (1/1) ... [2022-12-14 13:02:51,950 INFO L138 Inliner]: procedures = 94, calls = 341, calls flagged for inlining = 28, calls inlined = 24, statements flattened = 1104 [2022-12-14 13:02:51,950 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 13:02:51,951 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 13:02:51,951 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 13:02:51,951 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 13:02:51,957 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:02:51" (1/1) ... [2022-12-14 13:02:51,958 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:02:51" (1/1) ... [2022-12-14 13:02:51,961 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:02:51" (1/1) ... [2022-12-14 13:02:51,962 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:02:51" (1/1) ... [2022-12-14 13:02:51,973 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:02:51" (1/1) ... [2022-12-14 13:02:51,981 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:02:51" (1/1) ... [2022-12-14 13:02:51,984 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:02:51" (1/1) ... [2022-12-14 13:02:51,987 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:02:51" (1/1) ... [2022-12-14 13:02:51,992 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 13:02:51,993 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 13:02:51,993 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 13:02:51,993 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 13:02:51,993 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:02:51" (1/1) ... [2022-12-14 13:02:51,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 13:02:52,008 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a47a94-6bc7-46f9-a147-d1e81b2bbda2/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:02:52,019 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a47a94-6bc7-46f9-a147-d1e81b2bbda2/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 13:02:52,021 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a47a94-6bc7-46f9-a147-d1e81b2bbda2/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 13:02:52,055 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 13:02:52,055 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2022-12-14 13:02:52,055 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2022-12-14 13:02:52,055 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2022-12-14 13:02:52,055 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2022-12-14 13:02:52,055 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2022-12-14 13:02:52,056 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2022-12-14 13:02:52,056 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2022-12-14 13:02:52,056 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2022-12-14 13:02:52,056 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2022-12-14 13:02:52,056 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2022-12-14 13:02:52,056 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2022-12-14 13:02:52,056 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2022-12-14 13:02:52,056 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2022-12-14 13:02:52,056 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2022-12-14 13:02:52,056 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2022-12-14 13:02:52,056 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2022-12-14 13:02:52,057 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2022-12-14 13:02:52,057 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2022-12-14 13:02:52,057 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2022-12-14 13:02:52,057 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2022-12-14 13:02:52,057 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2022-12-14 13:02:52,057 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2022-12-14 13:02:52,057 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2022-12-14 13:02:52,057 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2022-12-14 13:02:52,057 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2022-12-14 13:02:52,057 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2022-12-14 13:02:52,057 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2022-12-14 13:02:52,058 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2022-12-14 13:02:52,058 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2022-12-14 13:02:52,058 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2022-12-14 13:02:52,058 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__empty [2022-12-14 13:02:52,058 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__empty [2022-12-14 13:02:52,058 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2022-12-14 13:02:52,058 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2022-12-14 13:02:52,058 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2022-12-14 13:02:52,058 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2022-12-14 13:02:52,058 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2022-12-14 13:02:52,058 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2022-12-14 13:02:52,059 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2022-12-14 13:02:52,059 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2022-12-14 13:02:52,059 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 13:02:52,059 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2022-12-14 13:02:52,059 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2022-12-14 13:02:52,059 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2022-12-14 13:02:52,059 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2022-12-14 13:02:52,059 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2022-12-14 13:02:52,059 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2022-12-14 13:02:52,059 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 13:02:52,059 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 13:02:52,060 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2022-12-14 13:02:52,060 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2022-12-14 13:02:52,060 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__executivefloor [2022-12-14 13:02:52,060 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__executivefloor [2022-12-14 13:02:52,177 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 13:02:52,179 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 13:02:52,872 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 13:02:53,352 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 13:02:53,353 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-12-14 13:02:53,355 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 01:02:53 BoogieIcfgContainer [2022-12-14 13:02:53,355 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 13:02:53,357 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 13:02:53,357 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 13:02:53,359 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 13:02:53,359 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 01:02:51" (1/3) ... [2022-12-14 13:02:53,360 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6609ee86 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 01:02:53, skipping insertion in model container [2022-12-14 13:02:53,360 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:02:51" (2/3) ... [2022-12-14 13:02:53,360 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6609ee86 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 01:02:53, skipping insertion in model container [2022-12-14 13:02:53,360 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 01:02:53" (3/3) ... [2022-12-14 13:02:53,361 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec14_product28.cil.c [2022-12-14 13:02:53,376 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 13:02:53,376 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 13:02:53,420 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 13:02:53,425 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;@259f1ab1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 13:02:53,426 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 13:02:53,430 INFO L276 IsEmpty]: Start isEmpty. Operand has 366 states, 242 states have (on average 1.56198347107438) internal successors, (378), 260 states have internal predecessors, (378), 97 states have call successors, (97), 25 states have call predecessors, (97), 25 states have return successors, (97), 94 states have call predecessors, (97), 97 states have call successors, (97) [2022-12-14 13:02:53,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-12-14 13:02:53,438 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:02:53,439 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:02:53,439 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:02:53,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:02:53,443 INFO L85 PathProgramCache]: Analyzing trace with hash -272036126, now seen corresponding path program 1 times [2022-12-14 13:02:53,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:02:53,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116962224] [2022-12-14 13:02:53,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:02:53,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:02:53,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:02:53,797 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 13:02:53,798 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:02:53,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116962224] [2022-12-14 13:02:53,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116962224] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:02:53,799 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:02:53,799 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 13:02:53,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679063297] [2022-12-14 13:02:53,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:02:53,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:02:53,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:02:53,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:02:53,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 13:02:53,827 INFO L87 Difference]: Start difference. First operand has 366 states, 242 states have (on average 1.56198347107438) internal successors, (378), 260 states have internal predecessors, (378), 97 states have call successors, (97), 25 states have call predecessors, (97), 25 states have return successors, (97), 94 states have call predecessors, (97), 97 states have call successors, (97) Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-12-14 13:02:54,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:02:54,172 INFO L93 Difference]: Finished difference Result 1074 states and 1705 transitions. [2022-12-14 13:02:54,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:02:54,175 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 43 [2022-12-14 13:02:54,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:02:54,198 INFO L225 Difference]: With dead ends: 1074 [2022-12-14 13:02:54,198 INFO L226 Difference]: Without dead ends: 709 [2022-12-14 13:02:54,207 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 13:02:54,211 INFO L413 NwaCegarLoop]: 678 mSDtfsCounter, 546 mSDsluCounter, 519 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 546 SdHoareTripleChecker+Valid, 1197 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 13:02:54,212 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [546 Valid, 1197 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 13:02:54,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 709 states. [2022-12-14 13:02:54,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 709 to 673. [2022-12-14 13:02:54,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 673 states, 459 states have (on average 1.5642701525054465) internal successors, (718), 485 states have internal predecessors, (718), 170 states have call successors, (170), 45 states have call predecessors, (170), 43 states have return successors, (175), 157 states have call predecessors, (175), 168 states have call successors, (175) [2022-12-14 13:02:54,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 673 states to 673 states and 1063 transitions. [2022-12-14 13:02:54,328 INFO L78 Accepts]: Start accepts. Automaton has 673 states and 1063 transitions. Word has length 43 [2022-12-14 13:02:54,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:02:54,328 INFO L495 AbstractCegarLoop]: Abstraction has 673 states and 1063 transitions. [2022-12-14 13:02:54,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-12-14 13:02:54,329 INFO L276 IsEmpty]: Start isEmpty. Operand 673 states and 1063 transitions. [2022-12-14 13:02:54,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-12-14 13:02:54,334 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:02:54,334 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:02:54,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 13:02:54,335 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:02:54,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:02:54,335 INFO L85 PathProgramCache]: Analyzing trace with hash 1828741631, now seen corresponding path program 1 times [2022-12-14 13:02:54,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:02:54,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256551291] [2022-12-14 13:02:54,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:02:54,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:02:54,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:02:54,582 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-12-14 13:02:54,582 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:02:54,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256551291] [2022-12-14 13:02:54,583 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256551291] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:02:54,583 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:02:54,583 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-14 13:02:54,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555055788] [2022-12-14 13:02:54,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:02:54,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 13:02:54,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:02:54,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 13:02:54,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-14 13:02:54,586 INFO L87 Difference]: Start difference. First operand 673 states and 1063 transitions. Second operand has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 7 states have internal predecessors, (43), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 5 states have call predecessors, (15), 4 states have call successors, (15) [2022-12-14 13:02:56,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:02:56,278 INFO L93 Difference]: Finished difference Result 2177 states and 3481 transitions. [2022-12-14 13:02:56,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-14 13:02:56,279 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 7 states have internal predecessors, (43), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 5 states have call predecessors, (15), 4 states have call successors, (15) Word has length 87 [2022-12-14 13:02:56,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:02:56,291 INFO L225 Difference]: With dead ends: 2177 [2022-12-14 13:02:56,292 INFO L226 Difference]: Without dead ends: 1516 [2022-12-14 13:02:56,297 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-12-14 13:02:56,299 INFO L413 NwaCegarLoop]: 319 mSDtfsCounter, 1094 mSDsluCounter, 970 mSDsCounter, 0 mSdLazyCounter, 2679 mSolverCounterSat, 448 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1184 SdHoareTripleChecker+Valid, 1289 SdHoareTripleChecker+Invalid, 3127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 448 IncrementalHoareTripleChecker+Valid, 2679 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-12-14 13:02:56,299 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1184 Valid, 1289 Invalid, 3127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [448 Valid, 2679 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-12-14 13:02:56,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1516 states. [2022-12-14 13:02:56,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1516 to 1374. [2022-12-14 13:02:56,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1374 states, 940 states have (on average 1.5606382978723403) internal successors, (1467), 991 states have internal predecessors, (1467), 340 states have call successors, (340), 91 states have call predecessors, (340), 93 states have return successors, (384), 318 states have call predecessors, (384), 336 states have call successors, (384) [2022-12-14 13:02:56,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1374 states to 1374 states and 2191 transitions. [2022-12-14 13:02:56,410 INFO L78 Accepts]: Start accepts. Automaton has 1374 states and 2191 transitions. Word has length 87 [2022-12-14 13:02:56,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:02:56,411 INFO L495 AbstractCegarLoop]: Abstraction has 1374 states and 2191 transitions. [2022-12-14 13:02:56,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 7 states have internal predecessors, (43), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 5 states have call predecessors, (15), 4 states have call successors, (15) [2022-12-14 13:02:56,411 INFO L276 IsEmpty]: Start isEmpty. Operand 1374 states and 2191 transitions. [2022-12-14 13:02:56,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-12-14 13:02:56,416 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:02:56,416 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:02:56,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 13:02:56,416 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:02:56,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:02:56,417 INFO L85 PathProgramCache]: Analyzing trace with hash -1003174560, now seen corresponding path program 1 times [2022-12-14 13:02:56,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:02:56,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657815313] [2022-12-14 13:02:56,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:02:56,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:02:56,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:02:56,834 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-12-14 13:02:56,834 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:02:56,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657815313] [2022-12-14 13:02:56,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657815313] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:02:56,835 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:02:56,835 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-12-14 13:02:56,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610046472] [2022-12-14 13:02:56,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:02:56,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-14 13:02:56,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:02:56,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-14 13:02:56,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-12-14 13:02:56,837 INFO L87 Difference]: Start difference. First operand 1374 states and 2191 transitions. Second operand has 9 states, 8 states have (on average 5.75) internal successors, (46), 8 states have internal predecessors, (46), 5 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) [2022-12-14 13:02:58,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:02:58,543 INFO L93 Difference]: Finished difference Result 2024 states and 3264 transitions. [2022-12-14 13:02:58,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-14 13:02:58,544 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 5.75) internal successors, (46), 8 states have internal predecessors, (46), 5 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) Word has length 91 [2022-12-14 13:02:58,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:02:58,552 INFO L225 Difference]: With dead ends: 2024 [2022-12-14 13:02:58,552 INFO L226 Difference]: Without dead ends: 2022 [2022-12-14 13:02:58,554 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2022-12-14 13:02:58,555 INFO L413 NwaCegarLoop]: 452 mSDtfsCounter, 1143 mSDsluCounter, 1682 mSDsCounter, 0 mSdLazyCounter, 3511 mSolverCounterSat, 700 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1165 SdHoareTripleChecker+Valid, 2134 SdHoareTripleChecker+Invalid, 4211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 700 IncrementalHoareTripleChecker+Valid, 3511 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-12-14 13:02:58,555 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1165 Valid, 2134 Invalid, 4211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [700 Valid, 3511 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-12-14 13:02:58,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2022 states. [2022-12-14 13:02:58,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2022 to 1784. [2022-12-14 13:02:58,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1784 states, 1173 states have (on average 1.5123614663256606) internal successors, (1774), 1249 states have internal predecessors, (1774), 483 states have call successors, (483), 121 states have call predecessors, (483), 127 states have return successors, (551), 452 states have call predecessors, (551), 477 states have call successors, (551) [2022-12-14 13:02:58,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1784 states to 1784 states and 2808 transitions. [2022-12-14 13:02:58,667 INFO L78 Accepts]: Start accepts. Automaton has 1784 states and 2808 transitions. Word has length 91 [2022-12-14 13:02:58,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:02:58,668 INFO L495 AbstractCegarLoop]: Abstraction has 1784 states and 2808 transitions. [2022-12-14 13:02:58,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 5.75) internal successors, (46), 8 states have internal predecessors, (46), 5 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) [2022-12-14 13:02:58,668 INFO L276 IsEmpty]: Start isEmpty. Operand 1784 states and 2808 transitions. [2022-12-14 13:02:58,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-12-14 13:02:58,673 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:02:58,673 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:02:58,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-14 13:02:58,674 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:02:58,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:02:58,674 INFO L85 PathProgramCache]: Analyzing trace with hash -1133102059, now seen corresponding path program 1 times [2022-12-14 13:02:58,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:02:58,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253561922] [2022-12-14 13:02:58,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:02:58,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:02:58,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:02:58,880 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2022-12-14 13:02:58,881 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:02:58,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253561922] [2022-12-14 13:02:58,881 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253561922] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:02:58,881 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:02:58,881 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 13:02:58,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815465406] [2022-12-14 13:02:58,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:02:58,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 13:02:58,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:02:58,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 13:02:58,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 13:02:58,883 INFO L87 Difference]: Start difference. First operand 1784 states and 2808 transitions. Second operand has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (19), 1 states have call predecessors, (19), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2022-12-14 13:02:59,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:02:59,117 INFO L93 Difference]: Finished difference Result 3654 states and 5826 transitions. [2022-12-14 13:02:59,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 13:02:59,118 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (19), 1 states have call predecessors, (19), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 122 [2022-12-14 13:02:59,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:02:59,129 INFO L225 Difference]: With dead ends: 3654 [2022-12-14 13:02:59,129 INFO L226 Difference]: Without dead ends: 1882 [2022-12-14 13:02:59,141 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 13:02:59,141 INFO L413 NwaCegarLoop]: 535 mSDtfsCounter, 30 mSDsluCounter, 1035 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 1570 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:02:59,142 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 1570 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:02:59,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1882 states. [2022-12-14 13:02:59,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1882 to 1796. [2022-12-14 13:02:59,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1796 states, 1185 states have (on average 1.5071729957805906) internal successors, (1786), 1261 states have internal predecessors, (1786), 483 states have call successors, (483), 121 states have call predecessors, (483), 127 states have return successors, (551), 452 states have call predecessors, (551), 477 states have call successors, (551) [2022-12-14 13:02:59,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1796 states to 1796 states and 2820 transitions. [2022-12-14 13:02:59,222 INFO L78 Accepts]: Start accepts. Automaton has 1796 states and 2820 transitions. Word has length 122 [2022-12-14 13:02:59,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:02:59,222 INFO L495 AbstractCegarLoop]: Abstraction has 1796 states and 2820 transitions. [2022-12-14 13:02:59,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (19), 1 states have call predecessors, (19), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2022-12-14 13:02:59,223 INFO L276 IsEmpty]: Start isEmpty. Operand 1796 states and 2820 transitions. [2022-12-14 13:02:59,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-12-14 13:02:59,225 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:02:59,226 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:02:59,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-14 13:02:59,226 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:02:59,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:02:59,226 INFO L85 PathProgramCache]: Analyzing trace with hash -2019268835, now seen corresponding path program 1 times [2022-12-14 13:02:59,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:02:59,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079236832] [2022-12-14 13:02:59,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:02:59,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:02:59,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:02:59,426 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2022-12-14 13:02:59,426 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:02:59,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079236832] [2022-12-14 13:02:59,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079236832] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:02:59,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256173693] [2022-12-14 13:02:59,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:02:59,427 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:02:59,427 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a47a94-6bc7-46f9-a147-d1e81b2bbda2/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:02:59,428 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a47a94-6bc7-46f9-a147-d1e81b2bbda2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:02:59,429 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a47a94-6bc7-46f9-a147-d1e81b2bbda2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 13:02:59,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:02:59,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 1518 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 13:02:59,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:02:59,687 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-12-14 13:02:59,687 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:02:59,688 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1256173693] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:02:59,688 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 13:02:59,688 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2022-12-14 13:02:59,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595231183] [2022-12-14 13:02:59,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:02:59,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 13:02:59,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:02:59,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 13:02:59,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-12-14 13:02:59,690 INFO L87 Difference]: Start difference. First operand 1796 states and 2820 transitions. Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2022-12-14 13:02:59,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:02:59,957 INFO L93 Difference]: Finished difference Result 3736 states and 5994 transitions. [2022-12-14 13:02:59,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 13:02:59,957 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 125 [2022-12-14 13:02:59,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:02:59,965 INFO L225 Difference]: With dead ends: 3736 [2022-12-14 13:02:59,965 INFO L226 Difference]: Without dead ends: 1952 [2022-12-14 13:02:59,973 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-12-14 13:02:59,973 INFO L413 NwaCegarLoop]: 461 mSDtfsCounter, 213 mSDsluCounter, 898 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 1359 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:02:59,973 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 1359 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:02:59,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1952 states. [2022-12-14 13:03:00,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1952 to 1952. [2022-12-14 13:03:00,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1952 states, 1337 states have (on average 1.5542258788332086) internal successors, (2078), 1413 states have internal predecessors, (2078), 483 states have call successors, (483), 125 states have call predecessors, (483), 131 states have return successors, (551), 452 states have call predecessors, (551), 477 states have call successors, (551) [2022-12-14 13:03:00,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1952 states to 1952 states and 3112 transitions. [2022-12-14 13:03:00,057 INFO L78 Accepts]: Start accepts. Automaton has 1952 states and 3112 transitions. Word has length 125 [2022-12-14 13:03:00,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:03:00,058 INFO L495 AbstractCegarLoop]: Abstraction has 1952 states and 3112 transitions. [2022-12-14 13:03:00,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2022-12-14 13:03:00,058 INFO L276 IsEmpty]: Start isEmpty. Operand 1952 states and 3112 transitions. [2022-12-14 13:03:00,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-12-14 13:03:00,061 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:03:00,061 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:03:00,069 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a47a94-6bc7-46f9-a147-d1e81b2bbda2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 13:03:00,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a47a94-6bc7-46f9-a147-d1e81b2bbda2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:03:00,262 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:03:00,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:03:00,262 INFO L85 PathProgramCache]: Analyzing trace with hash -1294566178, now seen corresponding path program 1 times [2022-12-14 13:03:00,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:03:00,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995561585] [2022-12-14 13:03:00,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:03:00,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:03:00,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:03:00,475 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2022-12-14 13:03:00,475 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:03:00,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995561585] [2022-12-14 13:03:00,476 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995561585] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:03:00,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400215674] [2022-12-14 13:03:00,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:03:00,476 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:03:00,476 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a47a94-6bc7-46f9-a147-d1e81b2bbda2/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:03:00,477 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a47a94-6bc7-46f9-a147-d1e81b2bbda2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:03:00,478 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a47a94-6bc7-46f9-a147-d1e81b2bbda2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 13:03:00,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:03:00,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 1523 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 13:03:00,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:03:00,753 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2022-12-14 13:03:00,753 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:03:00,753 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1400215674] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:03:00,754 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 13:03:00,754 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 11 [2022-12-14 13:03:00,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24580799] [2022-12-14 13:03:00,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:03:00,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 13:03:00,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:03:00,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 13:03:00,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2022-12-14 13:03:00,756 INFO L87 Difference]: Start difference. First operand 1952 states and 3112 transitions. Second operand has 6 states, 5 states have (on average 12.2) internal successors, (61), 4 states have internal predecessors, (61), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 3 states have call predecessors, (19), 2 states have call successors, (19) [2022-12-14 13:03:01,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:03:01,319 INFO L93 Difference]: Finished difference Result 3891 states and 6237 transitions. [2022-12-14 13:03:01,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 13:03:01,319 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 12.2) internal successors, (61), 4 states have internal predecessors, (61), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 3 states have call predecessors, (19), 2 states have call successors, (19) Word has length 129 [2022-12-14 13:03:01,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:03:01,335 INFO L225 Difference]: With dead ends: 3891 [2022-12-14 13:03:01,336 INFO L226 Difference]: Without dead ends: 1950 [2022-12-14 13:03:01,347 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2022-12-14 13:03:01,348 INFO L413 NwaCegarLoop]: 584 mSDtfsCounter, 375 mSDsluCounter, 1650 mSDsCounter, 0 mSdLazyCounter, 330 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 380 SdHoareTripleChecker+Valid, 2234 SdHoareTripleChecker+Invalid, 346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 13:03:01,348 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [380 Valid, 2234 Invalid, 346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 330 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 13:03:01,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1950 states. [2022-12-14 13:03:01,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1950 to 1948. [2022-12-14 13:03:01,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1948 states, 1337 states have (on average 1.5512341062079282) internal successors, (2074), 1409 states have internal predecessors, (2074), 479 states have call successors, (479), 125 states have call predecessors, (479), 131 states have return successors, (539), 452 states have call predecessors, (539), 473 states have call successors, (539) [2022-12-14 13:03:01,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1948 states to 1948 states and 3092 transitions. [2022-12-14 13:03:01,440 INFO L78 Accepts]: Start accepts. Automaton has 1948 states and 3092 transitions. Word has length 129 [2022-12-14 13:03:01,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:03:01,440 INFO L495 AbstractCegarLoop]: Abstraction has 1948 states and 3092 transitions. [2022-12-14 13:03:01,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 12.2) internal successors, (61), 4 states have internal predecessors, (61), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 3 states have call predecessors, (19), 2 states have call successors, (19) [2022-12-14 13:03:01,441 INFO L276 IsEmpty]: Start isEmpty. Operand 1948 states and 3092 transitions. [2022-12-14 13:03:01,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-12-14 13:03:01,445 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:03:01,445 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:03:01,453 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a47a94-6bc7-46f9-a147-d1e81b2bbda2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 13:03:01,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a47a94-6bc7-46f9-a147-d1e81b2bbda2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:03:01,647 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:03:01,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:03:01,649 INFO L85 PathProgramCache]: Analyzing trace with hash 361457891, now seen corresponding path program 1 times [2022-12-14 13:03:01,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:03:01,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822271989] [2022-12-14 13:03:01,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:03:01,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:03:01,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:03:01,861 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2022-12-14 13:03:01,861 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:03:01,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822271989] [2022-12-14 13:03:01,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822271989] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:03:01,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622544221] [2022-12-14 13:03:01,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:03:01,862 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:03:01,862 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a47a94-6bc7-46f9-a147-d1e81b2bbda2/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:03:01,863 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a47a94-6bc7-46f9-a147-d1e81b2bbda2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:03:01,864 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a47a94-6bc7-46f9-a147-d1e81b2bbda2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 13:03:02,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:03:02,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 1523 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 13:03:02,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:03:02,126 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 70 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-12-14 13:03:02,126 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:03:02,126 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1622544221] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:03:02,126 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 13:03:02,127 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-12-14 13:03:02,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466766868] [2022-12-14 13:03:02,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:03:02,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 13:03:02,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:03:02,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 13:03:02,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-14 13:03:02,128 INFO L87 Difference]: Start difference. First operand 1948 states and 3092 transitions. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2022-12-14 13:03:02,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:03:02,374 INFO L93 Difference]: Finished difference Result 4040 states and 6526 transitions. [2022-12-14 13:03:02,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 13:03:02,375 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 130 [2022-12-14 13:03:02,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:03:02,383 INFO L225 Difference]: With dead ends: 4040 [2022-12-14 13:03:02,383 INFO L226 Difference]: Without dead ends: 2104 [2022-12-14 13:03:02,390 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-12-14 13:03:02,391 INFO L413 NwaCegarLoop]: 461 mSDtfsCounter, 211 mSDsluCounter, 898 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 1359 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:03:02,391 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [211 Valid, 1359 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:03:02,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2104 states. [2022-12-14 13:03:02,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2104 to 2104. [2022-12-14 13:03:02,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2104 states, 1489 states have (on average 1.5889858965748824) internal successors, (2366), 1561 states have internal predecessors, (2366), 479 states have call successors, (479), 129 states have call predecessors, (479), 135 states have return successors, (539), 452 states have call predecessors, (539), 473 states have call successors, (539) [2022-12-14 13:03:02,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2104 states to 2104 states and 3384 transitions. [2022-12-14 13:03:02,471 INFO L78 Accepts]: Start accepts. Automaton has 2104 states and 3384 transitions. Word has length 130 [2022-12-14 13:03:02,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:03:02,471 INFO L495 AbstractCegarLoop]: Abstraction has 2104 states and 3384 transitions. [2022-12-14 13:03:02,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2022-12-14 13:03:02,471 INFO L276 IsEmpty]: Start isEmpty. Operand 2104 states and 3384 transitions. [2022-12-14 13:03:02,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-12-14 13:03:02,474 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:03:02,474 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:03:02,481 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a47a94-6bc7-46f9-a147-d1e81b2bbda2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 13:03:02,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a47a94-6bc7-46f9-a147-d1e81b2bbda2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-12-14 13:03:02,675 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:03:02,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:03:02,675 INFO L85 PathProgramCache]: Analyzing trace with hash 829377555, now seen corresponding path program 1 times [2022-12-14 13:03:02,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:03:02,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920594126] [2022-12-14 13:03:02,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:03:02,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:03:02,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:03:02,783 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2022-12-14 13:03:02,783 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:03:02,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920594126] [2022-12-14 13:03:02,783 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920594126] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:03:02,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2145456802] [2022-12-14 13:03:02,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:03:02,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:03:02,784 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a47a94-6bc7-46f9-a147-d1e81b2bbda2/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:03:02,784 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a47a94-6bc7-46f9-a147-d1e81b2bbda2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:03:02,785 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a47a94-6bc7-46f9-a147-d1e81b2bbda2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 13:03:02,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:03:02,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 1527 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 13:03:02,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:03:03,019 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-12-14 13:03:03,019 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:03:03,019 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2145456802] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:03:03,019 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 13:03:03,020 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-12-14 13:03:03,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212780237] [2022-12-14 13:03:03,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:03:03,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 13:03:03,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:03:03,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 13:03:03,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-14 13:03:03,021 INFO L87 Difference]: Start difference. First operand 2104 states and 3384 transitions. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2022-12-14 13:03:03,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:03:03,266 INFO L93 Difference]: Finished difference Result 4352 states and 7104 transitions. [2022-12-14 13:03:03,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 13:03:03,266 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 134 [2022-12-14 13:03:03,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:03:03,274 INFO L225 Difference]: With dead ends: 4352 [2022-12-14 13:03:03,275 INFO L226 Difference]: Without dead ends: 2260 [2022-12-14 13:03:03,282 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-12-14 13:03:03,282 INFO L413 NwaCegarLoop]: 461 mSDtfsCounter, 209 mSDsluCounter, 898 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 1359 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 13:03:03,283 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [209 Valid, 1359 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 13:03:03,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2260 states. [2022-12-14 13:03:03,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2260 to 2260. [2022-12-14 13:03:03,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2260 states, 1641 states have (on average 1.6197440585009142) internal successors, (2658), 1713 states have internal predecessors, (2658), 479 states have call successors, (479), 133 states have call predecessors, (479), 139 states have return successors, (539), 452 states have call predecessors, (539), 473 states have call successors, (539) [2022-12-14 13:03:03,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2260 states to 2260 states and 3676 transitions. [2022-12-14 13:03:03,374 INFO L78 Accepts]: Start accepts. Automaton has 2260 states and 3676 transitions. Word has length 134 [2022-12-14 13:03:03,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:03:03,374 INFO L495 AbstractCegarLoop]: Abstraction has 2260 states and 3676 transitions. [2022-12-14 13:03:03,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2022-12-14 13:03:03,374 INFO L276 IsEmpty]: Start isEmpty. Operand 2260 states and 3676 transitions. [2022-12-14 13:03:03,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-12-14 13:03:03,378 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:03:03,378 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:03:03,384 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a47a94-6bc7-46f9-a147-d1e81b2bbda2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 13:03:03,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a47a94-6bc7-46f9-a147-d1e81b2bbda2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-12-14 13:03:03,579 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:03:03,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:03:03,579 INFO L85 PathProgramCache]: Analyzing trace with hash -1827085443, now seen corresponding path program 1 times [2022-12-14 13:03:03,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:03:03,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825812468] [2022-12-14 13:03:03,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:03:03,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:03:03,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:03:03,673 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-12-14 13:03:03,673 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:03:03,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825812468] [2022-12-14 13:03:03,673 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825812468] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:03:03,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49161519] [2022-12-14 13:03:03,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:03:03,674 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:03:03,674 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a47a94-6bc7-46f9-a147-d1e81b2bbda2/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:03:03,675 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a47a94-6bc7-46f9-a147-d1e81b2bbda2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:03:03,676 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a47a94-6bc7-46f9-a147-d1e81b2bbda2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 13:03:03,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:03:03,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 1530 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 13:03:03,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:03:03,916 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 66 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-12-14 13:03:03,916 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:03:03,916 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [49161519] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:03:03,917 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 13:03:03,917 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-12-14 13:03:03,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28806117] [2022-12-14 13:03:03,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:03:03,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 13:03:03,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:03:03,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 13:03:03,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-14 13:03:03,918 INFO L87 Difference]: Start difference. First operand 2260 states and 3676 transitions. Second operand has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2022-12-14 13:03:04,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:03:04,163 INFO L93 Difference]: Finished difference Result 4664 states and 7682 transitions. [2022-12-14 13:03:04,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 13:03:04,163 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 137 [2022-12-14 13:03:04,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:03:04,174 INFO L225 Difference]: With dead ends: 4664 [2022-12-14 13:03:04,174 INFO L226 Difference]: Without dead ends: 2416 [2022-12-14 13:03:04,184 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-12-14 13:03:04,184 INFO L413 NwaCegarLoop]: 461 mSDtfsCounter, 207 mSDsluCounter, 898 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 1359 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:03:04,184 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [207 Valid, 1359 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:03:04,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2416 states. [2022-12-14 13:03:04,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2416 to 2416. [2022-12-14 13:03:04,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2416 states, 1793 states have (on average 1.645287228109314) internal successors, (2950), 1865 states have internal predecessors, (2950), 479 states have call successors, (479), 137 states have call predecessors, (479), 143 states have return successors, (539), 452 states have call predecessors, (539), 473 states have call successors, (539) [2022-12-14 13:03:04,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2416 states to 2416 states and 3968 transitions. [2022-12-14 13:03:04,273 INFO L78 Accepts]: Start accepts. Automaton has 2416 states and 3968 transitions. Word has length 137 [2022-12-14 13:03:04,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:03:04,274 INFO L495 AbstractCegarLoop]: Abstraction has 2416 states and 3968 transitions. [2022-12-14 13:03:04,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2022-12-14 13:03:04,274 INFO L276 IsEmpty]: Start isEmpty. Operand 2416 states and 3968 transitions. [2022-12-14 13:03:04,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2022-12-14 13:03:04,277 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:03:04,277 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:03:04,284 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a47a94-6bc7-46f9-a147-d1e81b2bbda2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 13:03:04,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a47a94-6bc7-46f9-a147-d1e81b2bbda2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:03:04,478 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:03:04,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:03:04,478 INFO L85 PathProgramCache]: Analyzing trace with hash 1256007083, now seen corresponding path program 1 times [2022-12-14 13:03:04,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:03:04,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999921961] [2022-12-14 13:03:04,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:03:04,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:03:04,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:03:04,672 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2022-12-14 13:03:04,673 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:03:04,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999921961] [2022-12-14 13:03:04,673 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999921961] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:03:04,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233762180] [2022-12-14 13:03:04,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:03:04,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:03:04,673 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a47a94-6bc7-46f9-a147-d1e81b2bbda2/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:03:04,674 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a47a94-6bc7-46f9-a147-d1e81b2bbda2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:03:04,675 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a47a94-6bc7-46f9-a147-d1e81b2bbda2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 13:03:04,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:03:04,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 1526 conjuncts, 44 conjunts are in the unsatisfiable core [2022-12-14 13:03:04,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:03:05,728 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2022-12-14 13:03:05,728 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:03:32,216 WARN L233 SmtUtils]: Spent 24.61s on a formula simplification. DAG size of input: 1441 DAG size of output: 51 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-12-14 13:03:58,460 WARN L233 SmtUtils]: Spent 25.20s on a formula simplification. DAG size of input: 1441 DAG size of output: 51 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-12-14 13:03:59,517 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-12-14 13:03:59,518 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [233762180] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:03:59,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1780986964] [2022-12-14 13:03:59,536 INFO L159 IcfgInterpreter]: Started Sifa with 99 locations of interest [2022-12-14 13:03:59,536 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:03:59,538 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:03:59,542 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:03:59,542 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:04:01,457 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 578 for LOIs [2022-12-14 13:04:05,376 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift__wrappee__executivefloor with input of size 577 for LOIs [2022-12-14 13:04:27,363 INFO L197 IcfgInterpreter]: Interpreting procedure isPersonOnFloor with input of size 75 for LOIs [2022-12-14 13:04:27,565 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedAtCurrentFloor__wrappee__empty with input of size 444 for LOIs [2022-12-14 13:04:28,279 INFO L197 IcfgInterpreter]: Interpreting procedure areDoorsOpen with input of size 508 for LOIs [2022-12-14 13:04:28,452 INFO L197 IcfgInterpreter]: Interpreting procedure isExecutiveFloorCalling with input of size 500 for LOIs [2022-12-14 13:04:29,612 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 41 for LOIs [2022-12-14 13:04:29,621 INFO L197 IcfgInterpreter]: Interpreting procedure resetCallOnFloor with input of size 120 for LOIs [2022-12-14 13:04:29,650 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 38 for LOIs [2022-12-14 13:04:29,652 INFO L197 IcfgInterpreter]: Interpreting procedure bigMacCall with input of size 579 for LOIs [2022-12-14 13:04:32,940 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 583 for LOIs [2022-12-14 13:04:33,512 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 511 for LOIs [2022-12-14 13:04:33,654 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:06:03,033 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '66511#(and (= |old(~floorButtons_2~0)| 0) (= ~executiveFloor~0 4) (= ~currentFloorID~0 |timeShift___utac_acc__Specification14_spec__1_~tmp~0#1|) (= |old(~persons_1~0)| 0) (= |old(~persons_5~0)| 0) (= |old(~doorState~0)| 1) (= |old(~persons_2~0)| 0) (= ~persons_5~0 0) (= |old(~persons_4~0)| 0) (= |old(~floorButtons_0~0)| 0) (<= |timeShift_~tmp~13#1| 1) (= |old(~blocked~0)| 0) (= |timeShift_isExecutiveFloor_~floorID#1| |timeShift_isExecutiveFloor_#in~floorID#1|) (<= |timeShift_isExecutiveFloor_~retValue_acc~21#1| 0) (= ~head~0.offset 0) (= |old(~weight~0)| 0) (<= 0 (+ 2147483648 |timeShift___utac_acc__Specification14_spec__1_~tmp___2~0#1|)) (= ~persons_4~0 0) (<= 1 |timeShift_~tmp~13#1|) (= ~doorState~0 |timeShift___utac_acc__Specification14_spec__1_~tmp___1~0#1|) (= |timeShift___utac_acc__Specification14_spec__1_~tmp~0#1| |timeShift_isExecutiveFloor_#in~floorID#1|) (= ~persons_3~0 0) (= |timeShift_isExecutiveFloor_#res#1| |timeShift___utac_acc__Specification14_spec__1_~tmp___0~0#1|) (= |old(~floorButtons_4~0)| 0) (<= 0 (+ |timeShift_isExecutiveFloor_~floorID#1| 2147483648)) (= |old(~persons_0~0)| 0) (= ~doorState~0 1) (<= |timeShift___utac_acc__Specification14_spec__1_~tmp___2~0#1| 2147483647) (= |old(~persons_3~0)| 0) (= ~persons_1~0 0) (= ~persons_0~0 0) (= |old(~floorButtons_3~0)| 0) (= ~head~0.base 0) (= |#NULL.offset| 0) (= |timeShift_isExecutiveFloor_~retValue_acc~21#1| (ite (= ~executiveFloor~0 |timeShift_isExecutiveFloor_~floorID#1|) 1 0)) (= ~blocked~0 0) (= |old(~currentHeading~0)| 1) (<= |timeShift_isExecutiveFloor_#in~floorID#1| 2147483647) (= |old(~personOnFloor_5_1~0)| 1) (= 1 |old(~calls_1~0)|) (= |old(~floorButtons_1~0)| 0) (= |old(~currentFloorID~0)| 0) (= |timeShift___utac_acc__Specification14_spec__1_~tmp___0~0#1| 0) (<= 0 |#StackHeapBarrier|) (= ~maximumWeight~0 100) (= ~cleanupTimeShifts~0 12) (not (= |timeShift___utac_acc__Specification14_spec__1_~tmp___2~0#1| 0)) (= |#NULL.base| 0) (= ~persons_2~0 0))' at error location [2022-12-14 13:06:03,033 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:06:03,033 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:06:03,034 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 16, 16] total 35 [2022-12-14 13:06:03,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198744361] [2022-12-14 13:06:03,034 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:06:03,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-12-14 13:06:03,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:06:03,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-12-14 13:06:03,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=939, Invalid=8567, Unknown=0, NotChecked=0, Total=9506 [2022-12-14 13:06:03,037 INFO L87 Difference]: Start difference. First operand 2416 states and 3968 transitions. Second operand has 35 states, 26 states have (on average 7.3076923076923075) internal successors, (190), 28 states have internal predecessors, (190), 13 states have call successors, (55), 9 states have call predecessors, (55), 18 states have return successors, (54), 19 states have call predecessors, (54), 13 states have call successors, (54) [2022-12-14 13:06:22,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:06:22,052 INFO L93 Difference]: Finished difference Result 10515 states and 18062 transitions. [2022-12-14 13:06:22,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2022-12-14 13:06:22,053 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 26 states have (on average 7.3076923076923075) internal successors, (190), 28 states have internal predecessors, (190), 13 states have call successors, (55), 9 states have call predecessors, (55), 18 states have return successors, (54), 19 states have call predecessors, (54), 13 states have call successors, (54) Word has length 139 [2022-12-14 13:06:22,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:06:22,087 INFO L225 Difference]: With dead ends: 10515 [2022-12-14 13:06:22,087 INFO L226 Difference]: Without dead ends: 6534 [2022-12-14 13:06:22,110 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 549 GetRequests, 329 SyntacticMatches, 22 SemanticMatches, 198 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15892 ImplicationChecksByTransitivity, 93.4s TimeCoverageRelationStatistics Valid=3351, Invalid=36449, Unknown=0, NotChecked=0, Total=39800 [2022-12-14 13:06:22,110 INFO L413 NwaCegarLoop]: 679 mSDtfsCounter, 9698 mSDsluCounter, 7928 mSDsCounter, 0 mSdLazyCounter, 30222 mSolverCounterSat, 8058 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9747 SdHoareTripleChecker+Valid, 8607 SdHoareTripleChecker+Invalid, 38280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 8058 IncrementalHoareTripleChecker+Valid, 30222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.5s IncrementalHoareTripleChecker+Time [2022-12-14 13:06:22,111 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9747 Valid, 8607 Invalid, 38280 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [8058 Valid, 30222 Invalid, 0 Unknown, 0 Unchecked, 14.5s Time] [2022-12-14 13:06:22,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6534 states. [2022-12-14 13:06:22,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6534 to 5871. [2022-12-14 13:06:22,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5871 states, 4170 states have (on average 1.5553956834532374) internal successors, (6486), 4425 states have internal predecessors, (6486), 1281 states have call successors, (1281), 369 states have call predecessors, (1281), 419 states have return successors, (1648), 1180 states have call predecessors, (1648), 1275 states have call successors, (1648) [2022-12-14 13:06:22,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5871 states to 5871 states and 9415 transitions. [2022-12-14 13:06:22,533 INFO L78 Accepts]: Start accepts. Automaton has 5871 states and 9415 transitions. Word has length 139 [2022-12-14 13:06:22,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:06:22,533 INFO L495 AbstractCegarLoop]: Abstraction has 5871 states and 9415 transitions. [2022-12-14 13:06:22,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 26 states have (on average 7.3076923076923075) internal successors, (190), 28 states have internal predecessors, (190), 13 states have call successors, (55), 9 states have call predecessors, (55), 18 states have return successors, (54), 19 states have call predecessors, (54), 13 states have call successors, (54) [2022-12-14 13:06:22,533 INFO L276 IsEmpty]: Start isEmpty. Operand 5871 states and 9415 transitions. [2022-12-14 13:06:22,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-12-14 13:06:22,540 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:06:22,540 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:06:22,547 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a47a94-6bc7-46f9-a147-d1e81b2bbda2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-14 13:06:22,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a47a94-6bc7-46f9-a147-d1e81b2bbda2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-12-14 13:06:22,741 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:06:22,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:06:22,741 INFO L85 PathProgramCache]: Analyzing trace with hash -742755013, now seen corresponding path program 1 times [2022-12-14 13:06:22,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:06:22,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179927106] [2022-12-14 13:06:22,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:06:22,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:06:22,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:06:22,960 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-12-14 13:06:22,961 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:06:22,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179927106] [2022-12-14 13:06:22,961 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179927106] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:06:22,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331404020] [2022-12-14 13:06:22,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:06:22,961 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:06:22,961 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a47a94-6bc7-46f9-a147-d1e81b2bbda2/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:06:22,962 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a47a94-6bc7-46f9-a147-d1e81b2bbda2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:06:22,963 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a47a94-6bc7-46f9-a147-d1e81b2bbda2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 13:06:23,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:06:23,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 1546 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 13:06:23,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:06:23,532 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2022-12-14 13:06:23,532 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:06:23,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [331404020] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:06:23,532 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 13:06:23,532 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [8] total 16 [2022-12-14 13:06:23,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406587251] [2022-12-14 13:06:23,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:06:23,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-14 13:06:23,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:06:23,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-14 13:06:23,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2022-12-14 13:06:23,533 INFO L87 Difference]: Start difference. First operand 5871 states and 9415 transitions. Second operand has 10 states, 9 states have (on average 8.333333333333334) internal successors, (75), 8 states have internal predecessors, (75), 6 states have call successors, (22), 5 states have call predecessors, (22), 6 states have return successors, (21), 7 states have call predecessors, (21), 6 states have call successors, (21) [2022-12-14 13:06:26,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:06:26,885 INFO L93 Difference]: Finished difference Result 13797 states and 22324 transitions. [2022-12-14 13:06:26,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-12-14 13:06:26,886 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 8.333333333333334) internal successors, (75), 8 states have internal predecessors, (75), 6 states have call successors, (22), 5 states have call predecessors, (22), 6 states have return successors, (21), 7 states have call predecessors, (21), 6 states have call successors, (21) Word has length 144 [2022-12-14 13:06:26,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:06:26,927 INFO L225 Difference]: With dead ends: 13797 [2022-12-14 13:06:26,927 INFO L226 Difference]: Without dead ends: 7940 [2022-12-14 13:06:26,952 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=99, Invalid=453, Unknown=0, NotChecked=0, Total=552 [2022-12-14 13:06:26,953 INFO L413 NwaCegarLoop]: 414 mSDtfsCounter, 1334 mSDsluCounter, 1245 mSDsCounter, 0 mSdLazyCounter, 5335 mSolverCounterSat, 708 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1505 SdHoareTripleChecker+Valid, 1659 SdHoareTripleChecker+Invalid, 6043 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 708 IncrementalHoareTripleChecker+Valid, 5335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-12-14 13:06:26,953 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1505 Valid, 1659 Invalid, 6043 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [708 Valid, 5335 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-12-14 13:06:26,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7940 states. [2022-12-14 13:06:27,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7940 to 7626. [2022-12-14 13:06:27,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7626 states, 5532 states have (on average 1.546999276934201) internal successors, (8558), 5814 states have internal predecessors, (8558), 1529 states have call successors, (1529), 507 states have call predecessors, (1529), 564 states have return successors, (1957), 1415 states have call predecessors, (1957), 1521 states have call successors, (1957) [2022-12-14 13:06:27,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7626 states to 7626 states and 12044 transitions. [2022-12-14 13:06:27,508 INFO L78 Accepts]: Start accepts. Automaton has 7626 states and 12044 transitions. Word has length 144 [2022-12-14 13:06:27,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:06:27,509 INFO L495 AbstractCegarLoop]: Abstraction has 7626 states and 12044 transitions. [2022-12-14 13:06:27,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 8.333333333333334) internal successors, (75), 8 states have internal predecessors, (75), 6 states have call successors, (22), 5 states have call predecessors, (22), 6 states have return successors, (21), 7 states have call predecessors, (21), 6 states have call successors, (21) [2022-12-14 13:06:27,509 INFO L276 IsEmpty]: Start isEmpty. Operand 7626 states and 12044 transitions. [2022-12-14 13:06:27,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2022-12-14 13:06:27,520 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:06:27,520 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:06:27,526 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a47a94-6bc7-46f9-a147-d1e81b2bbda2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-14 13:06:27,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a47a94-6bc7-46f9-a147-d1e81b2bbda2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-12-14 13:06:27,721 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:06:27,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:06:27,721 INFO L85 PathProgramCache]: Analyzing trace with hash -279019052, now seen corresponding path program 1 times [2022-12-14 13:06:27,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:06:27,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289420924] [2022-12-14 13:06:27,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:06:27,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:06:27,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:06:28,260 INFO L134 CoverageAnalysis]: Checked inductivity of 377 backedges. 22 proven. 63 refuted. 0 times theorem prover too weak. 292 trivial. 0 not checked. [2022-12-14 13:06:28,260 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:06:28,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289420924] [2022-12-14 13:06:28,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289420924] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:06:28,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726021323] [2022-12-14 13:06:28,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:06:28,261 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:06:28,261 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a47a94-6bc7-46f9-a147-d1e81b2bbda2/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:06:28,262 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a47a94-6bc7-46f9-a147-d1e81b2bbda2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:06:28,262 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a47a94-6bc7-46f9-a147-d1e81b2bbda2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 13:06:28,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:06:28,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 2747 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 13:06:28,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:06:28,768 INFO L134 CoverageAnalysis]: Checked inductivity of 377 backedges. 121 proven. 0 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2022-12-14 13:06:28,768 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:06:28,768 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1726021323] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:06:28,768 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 13:06:28,768 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [16] total 24 [2022-12-14 13:06:28,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628365406] [2022-12-14 13:06:28,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:06:28,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-14 13:06:28,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:06:28,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-14 13:06:28,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=492, Unknown=0, NotChecked=0, Total=552 [2022-12-14 13:06:28,770 INFO L87 Difference]: Start difference. First operand 7626 states and 12044 transitions. Second operand has 10 states, 8 states have (on average 13.25) internal successors, (106), 8 states have internal predecessors, (106), 4 states have call successors, (31), 3 states have call predecessors, (31), 5 states have return successors, (32), 4 states have call predecessors, (32), 4 states have call successors, (32) [2022-12-14 13:06:31,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:06:31,589 INFO L93 Difference]: Finished difference Result 12968 states and 20387 transitions. [2022-12-14 13:06:31,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-14 13:06:31,589 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 13.25) internal successors, (106), 8 states have internal predecessors, (106), 4 states have call successors, (31), 3 states have call predecessors, (31), 5 states have return successors, (32), 4 states have call predecessors, (32), 4 states have call successors, (32) Word has length 274 [2022-12-14 13:06:31,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:06:31,609 INFO L225 Difference]: With dead ends: 12968 [2022-12-14 13:06:31,609 INFO L226 Difference]: Without dead ends: 6680 [2022-12-14 13:06:31,623 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 270 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=114, Invalid=878, Unknown=0, NotChecked=0, Total=992 [2022-12-14 13:06:31,623 INFO L413 NwaCegarLoop]: 748 mSDtfsCounter, 1271 mSDsluCounter, 2617 mSDsCounter, 0 mSdLazyCounter, 3681 mSolverCounterSat, 338 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1292 SdHoareTripleChecker+Valid, 3365 SdHoareTripleChecker+Invalid, 4019 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 338 IncrementalHoareTripleChecker+Valid, 3681 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-12-14 13:06:31,624 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1292 Valid, 3365 Invalid, 4019 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [338 Valid, 3681 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-12-14 13:06:31,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6680 states. [2022-12-14 13:06:31,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6680 to 6542. [2022-12-14 13:06:31,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6542 states, 4681 states have (on average 1.5088656270027772) internal successors, (7063), 4908 states have internal predecessors, (7063), 1356 states have call successors, (1356), 477 states have call predecessors, (1356), 504 states have return successors, (1702), 1249 states have call predecessors, (1702), 1348 states have call successors, (1702) [2022-12-14 13:06:32,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6542 states to 6542 states and 10121 transitions. [2022-12-14 13:06:32,011 INFO L78 Accepts]: Start accepts. Automaton has 6542 states and 10121 transitions. Word has length 274 [2022-12-14 13:06:32,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:06:32,012 INFO L495 AbstractCegarLoop]: Abstraction has 6542 states and 10121 transitions. [2022-12-14 13:06:32,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 13.25) internal successors, (106), 8 states have internal predecessors, (106), 4 states have call successors, (31), 3 states have call predecessors, (31), 5 states have return successors, (32), 4 states have call predecessors, (32), 4 states have call successors, (32) [2022-12-14 13:06:32,012 INFO L276 IsEmpty]: Start isEmpty. Operand 6542 states and 10121 transitions. [2022-12-14 13:06:32,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2022-12-14 13:06:32,021 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:06:32,021 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 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] [2022-12-14 13:06:32,030 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a47a94-6bc7-46f9-a147-d1e81b2bbda2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-14 13:06:32,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a47a94-6bc7-46f9-a147-d1e81b2bbda2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-12-14 13:06:32,221 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:06:32,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:06:32,222 INFO L85 PathProgramCache]: Analyzing trace with hash 1750889007, now seen corresponding path program 1 times [2022-12-14 13:06:32,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:06:32,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504176361] [2022-12-14 13:06:32,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:06:32,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:06:32,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:06:32,456 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 27 proven. 22 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2022-12-14 13:06:32,457 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:06:32,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504176361] [2022-12-14 13:06:32,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504176361] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:06:32,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413672838] [2022-12-14 13:06:32,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:06:32,457 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:06:32,457 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a47a94-6bc7-46f9-a147-d1e81b2bbda2/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:06:32,458 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a47a94-6bc7-46f9-a147-d1e81b2bbda2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:06:32,459 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a47a94-6bc7-46f9-a147-d1e81b2bbda2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-14 13:06:32,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:06:32,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 2907 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 13:06:32,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:06:32,870 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 89 proven. 0 refuted. 0 times theorem prover too weak. 160 trivial. 0 not checked. [2022-12-14 13:06:32,870 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:06:32,870 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [413672838] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:06:32,871 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 13:06:32,871 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2022-12-14 13:06:32,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604447996] [2022-12-14 13:06:32,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:06:32,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 13:06:32,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:06:32,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 13:06:32,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-14 13:06:32,872 INFO L87 Difference]: Start difference. First operand 6542 states and 10121 transitions. Second operand has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 2 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) [2022-12-14 13:06:33,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:06:33,422 INFO L93 Difference]: Finished difference Result 13374 states and 20853 transitions. [2022-12-14 13:06:33,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 13:06:33,423 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 2 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) Word has length 225 [2022-12-14 13:06:33,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:06:33,446 INFO L225 Difference]: With dead ends: 13374 [2022-12-14 13:06:33,447 INFO L226 Difference]: Without dead ends: 6846 [2022-12-14 13:06:33,462 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 227 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-12-14 13:06:33,462 INFO L413 NwaCegarLoop]: 461 mSDtfsCounter, 205 mSDsluCounter, 898 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 1359 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:06:33,463 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [205 Valid, 1359 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 224 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:06:33,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6846 states. [2022-12-14 13:06:33,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6846 to 6846. [2022-12-14 13:06:33,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6846 states, 4973 states have (on average 1.52604061934446) internal successors, (7589), 5202 states have internal predecessors, (7589), 1356 states have call successors, (1356), 487 states have call predecessors, (1356), 516 states have return successors, (1702), 1249 states have call predecessors, (1702), 1348 states have call successors, (1702) [2022-12-14 13:06:33,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6846 states to 6846 states and 10647 transitions. [2022-12-14 13:06:33,955 INFO L78 Accepts]: Start accepts. Automaton has 6846 states and 10647 transitions. Word has length 225 [2022-12-14 13:06:33,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:06:33,955 INFO L495 AbstractCegarLoop]: Abstraction has 6846 states and 10647 transitions. [2022-12-14 13:06:33,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 2 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) [2022-12-14 13:06:33,955 INFO L276 IsEmpty]: Start isEmpty. Operand 6846 states and 10647 transitions. [2022-12-14 13:06:33,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2022-12-14 13:06:33,964 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:06:33,964 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:06:33,972 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a47a94-6bc7-46f9-a147-d1e81b2bbda2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-14 13:06:34,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a47a94-6bc7-46f9-a147-d1e81b2bbda2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:06:34,165 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:06:34,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:06:34,165 INFO L85 PathProgramCache]: Analyzing trace with hash 775270223, now seen corresponding path program 1 times [2022-12-14 13:06:34,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:06:34,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673823676] [2022-12-14 13:06:34,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:06:34,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:06:34,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:06:34,379 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 27 proven. 22 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2022-12-14 13:06:34,379 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:06:34,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673823676] [2022-12-14 13:06:34,379 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673823676] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:06:34,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131497250] [2022-12-14 13:06:34,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:06:34,380 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:06:34,380 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a47a94-6bc7-46f9-a147-d1e81b2bbda2/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:06:34,381 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a47a94-6bc7-46f9-a147-d1e81b2bbda2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:06:34,382 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a47a94-6bc7-46f9-a147-d1e81b2bbda2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-14 13:06:34,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:06:34,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 2908 conjuncts, 31 conjunts are in the unsatisfiable core [2022-12-14 13:06:34,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:06:35,507 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 110 proven. 6 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2022-12-14 13:06:35,507 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:06:39,416 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 27 proven. 33 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2022-12-14 13:06:39,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [131497250] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:06:39,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [86436424] [2022-12-14 13:06:39,419 INFO L159 IcfgInterpreter]: Started Sifa with 123 locations of interest [2022-12-14 13:06:39,419 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:06:39,420 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:06:39,420 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:06:39,420 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:06:46,658 INFO L197 IcfgInterpreter]: Interpreting procedure cleanup with input of size 569 for LOIs [2022-12-14 13:06:47,116 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 38 for LOIs [2022-12-14 13:06:47,710 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift__wrappee__executivefloor with input of size 182 for LOIs [2022-12-14 13:06:49,503 INFO L197 IcfgInterpreter]: Interpreting procedure isPersonOnFloor with input of size 80 for LOIs [2022-12-14 13:06:49,848 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedAtCurrentFloor__wrappee__empty with input of size 34 for LOIs [2022-12-14 13:06:49,901 INFO L197 IcfgInterpreter]: Interpreting procedure areDoorsOpen with input of size 58 for LOIs [2022-12-14 13:06:49,910 INFO L197 IcfgInterpreter]: Interpreting procedure isExecutiveFloorCalling with input of size 59 for LOIs [2022-12-14 13:06:50,000 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 31 for LOIs [2022-12-14 13:06:50,007 INFO L197 IcfgInterpreter]: Interpreting procedure leaveElevator with input of size 70 for LOIs [2022-12-14 13:06:50,245 INFO L197 IcfgInterpreter]: Interpreting procedure resetCallOnFloor with input of size 56 for LOIs [2022-12-14 13:06:50,257 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 31 for LOIs [2022-12-14 13:06:50,259 INFO L197 IcfgInterpreter]: Interpreting procedure bigMacCall with input of size 579 for LOIs [2022-12-14 13:06:53,686 INFO L197 IcfgInterpreter]: Interpreting procedure getWeight with input of size 36 for LOIs [2022-12-14 13:06:53,696 INFO L197 IcfgInterpreter]: Interpreting procedure getDestination with input of size 35 for LOIs [2022-12-14 13:06:53,707 INFO L197 IcfgInterpreter]: Interpreting procedure bobCall with input of size 521 for LOIs [2022-12-14 13:06:55,900 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 792 for LOIs [2022-12-14 13:07:04,153 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 645 for LOIs [2022-12-14 13:07:04,610 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:07:27,174 WARN L233 SmtUtils]: Spent 5.28s on a formula simplification. DAG size of input: 651 DAG size of output: 598 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 13:07:36,396 WARN L233 SmtUtils]: Spent 8.83s on a formula simplification. DAG size of input: 792 DAG size of output: 594 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 13:07:47,218 WARN L233 SmtUtils]: Spent 10.34s on a formula simplification. DAG size of input: 803 DAG size of output: 784 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 13:08:27,234 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '174011#(and (<= |old(~doorState~0)| 2147483647) (= ~executiveFloor~0 4) (= ~currentFloorID~0 |timeShift___utac_acc__Specification14_spec__1_~tmp~0#1|) (not (= |timeShift___utac_acc__Specification14_spec__1_~tmp___1~0#1| 0)) (<= 0 (+ |old(~doorState~0)| 2147483648)) (= |timeShift_isExecutiveFloor_~floorID#1| |timeShift_isExecutiveFloor_#in~floorID#1|) (<= |timeShift_isExecutiveFloor_~retValue_acc~21#1| 0) (= ~head~0.offset 0) (<= 0 (+ 2147483648 |timeShift___utac_acc__Specification14_spec__1_~tmp___2~0#1|)) (<= 0 (+ 2147483648 |timeShift___utac_acc__Specification14_spec__1_~tmp___1~0#1|)) (= ~doorState~0 |timeShift___utac_acc__Specification14_spec__1_~tmp___1~0#1|) (<= 0 |old(~blocked~0)|) (= |timeShift___utac_acc__Specification14_spec__1_~tmp~0#1| |timeShift_isExecutiveFloor_#in~floorID#1|) (= |timeShift_isExecutiveFloor_#res#1| |timeShift___utac_acc__Specification14_spec__1_~tmp___0~0#1|) (<= 0 (+ |timeShift_isExecutiveFloor_~floorID#1| 2147483648)) (<= |timeShift_~tmp~13#1| 2147483647) (<= |old(~blocked~0)| 1) (<= |timeShift___utac_acc__Specification14_spec__1_~tmp___2~0#1| 2147483647) (= ~head~0.base 0) (= |#NULL.offset| 0) (<= ~doorState~0 2147483647) (<= 0 (+ 2147483648 |timeShift_~tmp~13#1|)) (<= ~blocked~0 1) (= |timeShift_isExecutiveFloor_~retValue_acc~21#1| (ite (= ~executiveFloor~0 |timeShift_isExecutiveFloor_~floorID#1|) 1 0)) (<= |timeShift_isExecutiveFloor_#in~floorID#1| 2147483647) (<= 0 ~blocked~0) (= |timeShift___utac_acc__Specification14_spec__1_~tmp___0~0#1| 0) (<= 0 |#StackHeapBarrier|) (= ~maximumWeight~0 100) (= ~cleanupTimeShifts~0 12) (not (= |timeShift___utac_acc__Specification14_spec__1_~tmp___2~0#1| 0)) (= |#NULL.base| 0))' at error location [2022-12-14 13:08:27,235 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:08:27,235 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:08:27,235 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 12, 13] total 27 [2022-12-14 13:08:27,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159872974] [2022-12-14 13:08:27,235 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:08:27,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-12-14 13:08:27,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:08:27,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-12-14 13:08:27,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1156, Invalid=12886, Unknown=0, NotChecked=0, Total=14042 [2022-12-14 13:08:27,238 INFO L87 Difference]: Start difference. First operand 6846 states and 10647 transitions. Second operand has 27 states, 19 states have (on average 12.473684210526315) internal successors, (237), 22 states have internal predecessors, (237), 20 states have call successors, (87), 10 states have call predecessors, (87), 14 states have return successors, (85), 20 states have call predecessors, (85), 20 states have call successors, (85) [2022-12-14 13:08:51,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:08:51,382 INFO L93 Difference]: Finished difference Result 35773 states and 57395 transitions. [2022-12-14 13:08:51,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-12-14 13:08:51,383 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 19 states have (on average 12.473684210526315) internal successors, (237), 22 states have internal predecessors, (237), 20 states have call successors, (87), 10 states have call predecessors, (87), 14 states have return successors, (85), 20 states have call predecessors, (85), 20 states have call successors, (85) Word has length 226 [2022-12-14 13:08:51,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:08:51,481 INFO L225 Difference]: With dead ends: 35773 [2022-12-14 13:08:51,481 INFO L226 Difference]: Without dead ends: 27374 [2022-12-14 13:08:51,523 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 759 GetRequests, 558 SyntacticMatches, 23 SemanticMatches, 178 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14943 ImplicationChecksByTransitivity, 86.9s TimeCoverageRelationStatistics Valid=2585, Invalid=29635, Unknown=0, NotChecked=0, Total=32220 [2022-12-14 13:08:51,524 INFO L413 NwaCegarLoop]: 1126 mSDtfsCounter, 8877 mSDsluCounter, 7925 mSDsCounter, 0 mSdLazyCounter, 28620 mSolverCounterSat, 9160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8925 SdHoareTripleChecker+Valid, 9051 SdHoareTripleChecker+Invalid, 37780 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 9160 IncrementalHoareTripleChecker+Valid, 28620 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.3s IncrementalHoareTripleChecker+Time [2022-12-14 13:08:51,524 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8925 Valid, 9051 Invalid, 37780 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [9160 Valid, 28620 Invalid, 0 Unknown, 0 Unchecked, 17.3s Time] [2022-12-14 13:08:51,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27374 states. [2022-12-14 13:08:53,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27374 to 21718. [2022-12-14 13:08:53,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21718 states, 15478 states have (on average 1.531787052590774) internal successors, (23709), 16371 states have internal predecessors, (23709), 4702 states have call successors, (4702), 1423 states have call predecessors, (4702), 1537 states have return successors, (5821), 4171 states have call predecessors, (5821), 4676 states have call successors, (5821) [2022-12-14 13:08:53,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21718 states to 21718 states and 34232 transitions. [2022-12-14 13:08:53,330 INFO L78 Accepts]: Start accepts. Automaton has 21718 states and 34232 transitions. Word has length 226 [2022-12-14 13:08:53,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:08:53,331 INFO L495 AbstractCegarLoop]: Abstraction has 21718 states and 34232 transitions. [2022-12-14 13:08:53,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 19 states have (on average 12.473684210526315) internal successors, (237), 22 states have internal predecessors, (237), 20 states have call successors, (87), 10 states have call predecessors, (87), 14 states have return successors, (85), 20 states have call predecessors, (85), 20 states have call successors, (85) [2022-12-14 13:08:53,331 INFO L276 IsEmpty]: Start isEmpty. Operand 21718 states and 34232 transitions. [2022-12-14 13:08:53,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 361 [2022-12-14 13:08:53,343 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:08:53,344 INFO L195 NwaCegarLoop]: trace histogram [13, 11, 11, 11, 11, 7, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:08:53,353 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a47a94-6bc7-46f9-a147-d1e81b2bbda2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-12-14 13:08:53,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a47a94-6bc7-46f9-a147-d1e81b2bbda2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-12-14 13:08:53,545 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:08:53,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:08:53,546 INFO L85 PathProgramCache]: Analyzing trace with hash 1967598109, now seen corresponding path program 1 times [2022-12-14 13:08:53,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:08:53,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749267127] [2022-12-14 13:08:53,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:08:53,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:08:53,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:08:54,081 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 29 proven. 71 refuted. 0 times theorem prover too weak. 602 trivial. 0 not checked. [2022-12-14 13:08:54,081 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:08:54,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749267127] [2022-12-14 13:08:54,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749267127] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:08:54,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98871619] [2022-12-14 13:08:54,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:08:54,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:08:54,082 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a47a94-6bc7-46f9-a147-d1e81b2bbda2/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:08:54,083 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a47a94-6bc7-46f9-a147-d1e81b2bbda2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:08:54,084 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a47a94-6bc7-46f9-a147-d1e81b2bbda2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-14 13:08:54,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:08:54,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 3871 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 13:08:54,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:08:54,848 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 170 proven. 0 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2022-12-14 13:08:54,848 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:08:54,848 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [98871619] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:08:54,848 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 13:08:54,849 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10] total 18 [2022-12-14 13:08:54,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172357399] [2022-12-14 13:08:54,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:08:54,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-14 13:08:54,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:08:54,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-14 13:08:54,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2022-12-14 13:08:54,850 INFO L87 Difference]: Start difference. First operand 21718 states and 34232 transitions. Second operand has 10 states, 8 states have (on average 14.25) internal successors, (114), 8 states have internal predecessors, (114), 4 states have call successors, (38), 3 states have call predecessors, (38), 5 states have return successors, (38), 4 states have call predecessors, (38), 4 states have call successors, (38) [2022-12-14 13:08:58,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:08:58,615 INFO L93 Difference]: Finished difference Result 39795 states and 63141 transitions. [2022-12-14 13:08:58,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-14 13:08:58,616 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 14.25) internal successors, (114), 8 states have internal predecessors, (114), 4 states have call successors, (38), 3 states have call predecessors, (38), 5 states have return successors, (38), 4 states have call predecessors, (38), 4 states have call successors, (38) Word has length 360 [2022-12-14 13:08:58,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:08:58,679 INFO L225 Difference]: With dead ends: 39795 [2022-12-14 13:08:58,679 INFO L226 Difference]: Without dead ends: 21760 [2022-12-14 13:08:58,723 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 380 GetRequests, 356 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2022-12-14 13:08:58,723 INFO L413 NwaCegarLoop]: 751 mSDtfsCounter, 1337 mSDsluCounter, 2597 mSDsCounter, 0 mSdLazyCounter, 3756 mSolverCounterSat, 335 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1357 SdHoareTripleChecker+Valid, 3348 SdHoareTripleChecker+Invalid, 4091 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 335 IncrementalHoareTripleChecker+Valid, 3756 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-12-14 13:08:58,723 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1357 Valid, 3348 Invalid, 4091 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [335 Valid, 3756 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-12-14 13:08:58,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21760 states. [2022-12-14 13:09:00,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21760 to 21190. [2022-12-14 13:09:00,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21190 states, 14950 states have (on average 1.5120401337792642) internal successors, (22605), 15843 states have internal predecessors, (22605), 4702 states have call successors, (4702), 1423 states have call predecessors, (4702), 1537 states have return successors, (5821), 4171 states have call predecessors, (5821), 4676 states have call successors, (5821) [2022-12-14 13:09:00,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21190 states to 21190 states and 33128 transitions. [2022-12-14 13:09:00,411 INFO L78 Accepts]: Start accepts. Automaton has 21190 states and 33128 transitions. Word has length 360 [2022-12-14 13:09:00,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:09:00,412 INFO L495 AbstractCegarLoop]: Abstraction has 21190 states and 33128 transitions. [2022-12-14 13:09:00,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 14.25) internal successors, (114), 8 states have internal predecessors, (114), 4 states have call successors, (38), 3 states have call predecessors, (38), 5 states have return successors, (38), 4 states have call predecessors, (38), 4 states have call successors, (38) [2022-12-14 13:09:00,412 INFO L276 IsEmpty]: Start isEmpty. Operand 21190 states and 33128 transitions. [2022-12-14 13:09:00,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 362 [2022-12-14 13:09:00,425 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:09:00,425 INFO L195 NwaCegarLoop]: trace histogram [13, 11, 11, 11, 11, 7, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:09:00,434 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a47a94-6bc7-46f9-a147-d1e81b2bbda2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-14 13:09:00,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a47a94-6bc7-46f9-a147-d1e81b2bbda2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-12-14 13:09:00,627 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:09:00,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:09:00,629 INFO L85 PathProgramCache]: Analyzing trace with hash 509363839, now seen corresponding path program 1 times [2022-12-14 13:09:00,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:09:00,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968937343] [2022-12-14 13:09:00,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:09:00,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:09:00,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:09:01,077 INFO L134 CoverageAnalysis]: Checked inductivity of 711 backedges. 47 proven. 28 refuted. 0 times theorem prover too weak. 636 trivial. 0 not checked. [2022-12-14 13:09:01,077 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:09:01,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968937343] [2022-12-14 13:09:01,077 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968937343] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:09:01,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689603370] [2022-12-14 13:09:01,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:09:01,077 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:09:01,078 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a47a94-6bc7-46f9-a147-d1e81b2bbda2/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:09:01,078 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a47a94-6bc7-46f9-a147-d1e81b2bbda2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:09:01,079 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a47a94-6bc7-46f9-a147-d1e81b2bbda2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-14 13:09:01,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:09:01,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 3874 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 13:09:01,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:09:01,922 INFO L134 CoverageAnalysis]: Checked inductivity of 711 backedges. 175 proven. 0 refuted. 0 times theorem prover too weak. 536 trivial. 0 not checked. [2022-12-14 13:09:01,922 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:09:01,922 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [689603370] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:09:01,922 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 13:09:01,923 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [11] total 19 [2022-12-14 13:09:01,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702506842] [2022-12-14 13:09:01,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:09:01,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-14 13:09:01,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:09:01,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-14 13:09:01,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2022-12-14 13:09:01,924 INFO L87 Difference]: Start difference. First operand 21190 states and 33128 transitions. Second operand has 10 states, 8 states have (on average 14.375) internal successors, (115), 8 states have internal predecessors, (115), 4 states have call successors, (38), 3 states have call predecessors, (38), 5 states have return successors, (38), 4 states have call predecessors, (38), 4 states have call successors, (38) [2022-12-14 13:09:05,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:09:05,821 INFO L93 Difference]: Finished difference Result 38739 states and 60933 transitions. [2022-12-14 13:09:05,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-14 13:09:05,821 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 14.375) internal successors, (115), 8 states have internal predecessors, (115), 4 states have call successors, (38), 3 states have call predecessors, (38), 5 states have return successors, (38), 4 states have call predecessors, (38), 4 states have call successors, (38) Word has length 361 [2022-12-14 13:09:05,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:09:05,894 INFO L225 Difference]: With dead ends: 38739 [2022-12-14 13:09:05,894 INFO L226 Difference]: Without dead ends: 21232 [2022-12-14 13:09:05,944 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 379 GetRequests, 354 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=89, Invalid=613, Unknown=0, NotChecked=0, Total=702 [2022-12-14 13:09:05,945 INFO L413 NwaCegarLoop]: 751 mSDtfsCounter, 1169 mSDsluCounter, 2585 mSDsCounter, 0 mSdLazyCounter, 3755 mSolverCounterSat, 222 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1189 SdHoareTripleChecker+Valid, 3336 SdHoareTripleChecker+Invalid, 3977 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 222 IncrementalHoareTripleChecker+Valid, 3755 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-12-14 13:09:05,945 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1189 Valid, 3336 Invalid, 3977 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [222 Valid, 3755 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-12-14 13:09:05,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21232 states. [2022-12-14 13:09:07,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21232 to 20662. [2022-12-14 13:09:07,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20662 states, 14422 states have (on average 1.4908473165996394) internal successors, (21501), 15315 states have internal predecessors, (21501), 4702 states have call successors, (4702), 1423 states have call predecessors, (4702), 1537 states have return successors, (5821), 4171 states have call predecessors, (5821), 4676 states have call successors, (5821) [2022-12-14 13:09:07,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20662 states to 20662 states and 32024 transitions. [2022-12-14 13:09:07,638 INFO L78 Accepts]: Start accepts. Automaton has 20662 states and 32024 transitions. Word has length 361 [2022-12-14 13:09:07,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:09:07,639 INFO L495 AbstractCegarLoop]: Abstraction has 20662 states and 32024 transitions. [2022-12-14 13:09:07,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 14.375) internal successors, (115), 8 states have internal predecessors, (115), 4 states have call successors, (38), 3 states have call predecessors, (38), 5 states have return successors, (38), 4 states have call predecessors, (38), 4 states have call successors, (38) [2022-12-14 13:09:07,639 INFO L276 IsEmpty]: Start isEmpty. Operand 20662 states and 32024 transitions. [2022-12-14 13:09:07,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 286 [2022-12-14 13:09:07,649 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:09:07,650 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:09:07,659 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a47a94-6bc7-46f9-a147-d1e81b2bbda2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-12-14 13:09:07,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a47a94-6bc7-46f9-a147-d1e81b2bbda2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:09:07,851 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:09:07,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:09:07,852 INFO L85 PathProgramCache]: Analyzing trace with hash 1347758033, now seen corresponding path program 1 times [2022-12-14 13:09:07,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:09:07,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815662383] [2022-12-14 13:09:07,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:09:07,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:09:07,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:09:08,215 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 21 proven. 38 refuted. 0 times theorem prover too weak. 366 trivial. 0 not checked. [2022-12-14 13:09:08,215 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:09:08,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815662383] [2022-12-14 13:09:08,215 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815662383] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:09:08,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033513274] [2022-12-14 13:09:08,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:09:08,215 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:09:08,216 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a47a94-6bc7-46f9-a147-d1e81b2bbda2/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:09:08,216 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a47a94-6bc7-46f9-a147-d1e81b2bbda2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:09:08,217 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a47a94-6bc7-46f9-a147-d1e81b2bbda2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-14 13:09:08,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:09:08,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 2750 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 13:09:08,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:09:08,781 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 134 proven. 0 refuted. 0 times theorem prover too weak. 291 trivial. 0 not checked. [2022-12-14 13:09:08,781 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:09:08,781 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1033513274] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:09:08,781 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 13:09:08,781 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10] total 18 [2022-12-14 13:09:08,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979236459] [2022-12-14 13:09:08,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:09:08,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-14 13:09:08,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:09:08,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-14 13:09:08,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2022-12-14 13:09:08,782 INFO L87 Difference]: Start difference. First operand 20662 states and 32024 transitions. Second operand has 10 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 4 states have call successors, (30), 3 states have call predecessors, (30), 5 states have return successors, (31), 4 states have call predecessors, (31), 4 states have call successors, (31) [2022-12-14 13:09:12,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:09:12,834 INFO L93 Difference]: Finished difference Result 37683 states and 58725 transitions. [2022-12-14 13:09:12,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-14 13:09:12,835 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 4 states have call successors, (30), 3 states have call predecessors, (30), 5 states have return successors, (31), 4 states have call predecessors, (31), 4 states have call successors, (31) Word has length 285 [2022-12-14 13:09:12,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:09:12,906 INFO L225 Difference]: With dead ends: 37683 [2022-12-14 13:09:12,906 INFO L226 Difference]: Without dead ends: 20704 [2022-12-14 13:09:12,954 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 281 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2022-12-14 13:09:12,954 INFO L413 NwaCegarLoop]: 751 mSDtfsCounter, 1337 mSDsluCounter, 2573 mSDsCounter, 0 mSdLazyCounter, 3754 mSolverCounterSat, 341 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1357 SdHoareTripleChecker+Valid, 3324 SdHoareTripleChecker+Invalid, 4095 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 341 IncrementalHoareTripleChecker+Valid, 3754 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-12-14 13:09:12,955 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1357 Valid, 3324 Invalid, 4095 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [341 Valid, 3754 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-12-14 13:09:12,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20704 states. [2022-12-14 13:09:14,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20704 to 20134. [2022-12-14 13:09:14,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20134 states, 13894 states have (on average 1.468043759896358) internal successors, (20397), 14787 states have internal predecessors, (20397), 4702 states have call successors, (4702), 1423 states have call predecessors, (4702), 1537 states have return successors, (5821), 4171 states have call predecessors, (5821), 4676 states have call successors, (5821) [2022-12-14 13:09:14,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20134 states to 20134 states and 30920 transitions. [2022-12-14 13:09:14,607 INFO L78 Accepts]: Start accepts. Automaton has 20134 states and 30920 transitions. Word has length 285 [2022-12-14 13:09:14,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:09:14,607 INFO L495 AbstractCegarLoop]: Abstraction has 20134 states and 30920 transitions. [2022-12-14 13:09:14,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 4 states have call successors, (30), 3 states have call predecessors, (30), 5 states have return successors, (31), 4 states have call predecessors, (31), 4 states have call successors, (31) [2022-12-14 13:09:14,608 INFO L276 IsEmpty]: Start isEmpty. Operand 20134 states and 30920 transitions. [2022-12-14 13:09:14,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 367 [2022-12-14 13:09:14,619 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:09:14,619 INFO L195 NwaCegarLoop]: trace histogram [13, 11, 11, 11, 11, 7, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:09:14,628 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a47a94-6bc7-46f9-a147-d1e81b2bbda2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-12-14 13:09:14,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a47a94-6bc7-46f9-a147-d1e81b2bbda2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-12-14 13:09:14,822 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:09:14,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:09:14,823 INFO L85 PathProgramCache]: Analyzing trace with hash 1245318163, now seen corresponding path program 1 times [2022-12-14 13:09:14,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:09:14,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517120977] [2022-12-14 13:09:14,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:09:14,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:09:14,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:09:15,340 INFO L134 CoverageAnalysis]: Checked inductivity of 746 backedges. 29 proven. 71 refuted. 0 times theorem prover too weak. 646 trivial. 0 not checked. [2022-12-14 13:09:15,341 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:09:15,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517120977] [2022-12-14 13:09:15,341 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517120977] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:09:15,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044715345] [2022-12-14 13:09:15,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:09:15,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:09:15,341 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a47a94-6bc7-46f9-a147-d1e81b2bbda2/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:09:15,342 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a47a94-6bc7-46f9-a147-d1e81b2bbda2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:09:15,342 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a47a94-6bc7-46f9-a147-d1e81b2bbda2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-14 13:09:15,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:09:15,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 3868 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-14 13:09:15,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:09:16,048 INFO L134 CoverageAnalysis]: Checked inductivity of 746 backedges. 188 proven. 0 refuted. 0 times theorem prover too weak. 558 trivial. 0 not checked. [2022-12-14 13:09:16,048 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:09:16,048 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1044715345] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:09:16,048 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 13:09:16,048 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10] total 18 [2022-12-14 13:09:16,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332604228] [2022-12-14 13:09:16,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:09:16,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-14 13:09:16,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:09:16,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-14 13:09:16,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2022-12-14 13:09:16,050 INFO L87 Difference]: Start difference. First operand 20134 states and 30920 transitions. Second operand has 10 states, 8 states have (on average 14.0) internal successors, (112), 8 states have internal predecessors, (112), 4 states have call successors, (38), 3 states have call predecessors, (38), 5 states have return successors, (38), 4 states have call predecessors, (38), 4 states have call successors, (38) [2022-12-14 13:09:19,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:09:19,813 INFO L93 Difference]: Finished difference Result 38180 states and 59430 transitions. [2022-12-14 13:09:19,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-14 13:09:19,814 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 14.0) internal successors, (112), 8 states have internal predecessors, (112), 4 states have call successors, (38), 3 states have call predecessors, (38), 5 states have return successors, (38), 4 states have call predecessors, (38), 4 states have call successors, (38) Word has length 366 [2022-12-14 13:09:19,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:09:19,895 INFO L225 Difference]: With dead ends: 38180 [2022-12-14 13:09:19,895 INFO L226 Difference]: Without dead ends: 20640 [2022-12-14 13:09:19,963 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 386 GetRequests, 362 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2022-12-14 13:09:19,963 INFO L413 NwaCegarLoop]: 750 mSDtfsCounter, 1244 mSDsluCounter, 2572 mSDsCounter, 0 mSdLazyCounter, 3730 mSolverCounterSat, 339 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1264 SdHoareTripleChecker+Valid, 3322 SdHoareTripleChecker+Invalid, 4069 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 339 IncrementalHoareTripleChecker+Valid, 3730 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-12-14 13:09:19,963 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1264 Valid, 3322 Invalid, 4069 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [339 Valid, 3730 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-12-14 13:09:19,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20640 states. [2022-12-14 13:09:21,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20640 to 20070. [2022-12-14 13:09:21,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20070 states, 13840 states have (on average 1.4604768786127167) internal successors, (20213), 14733 states have internal predecessors, (20213), 4692 states have call successors, (4692), 1423 states have call predecessors, (4692), 1537 states have return successors, (5811), 4161 states have call predecessors, (5811), 4666 states have call successors, (5811) [2022-12-14 13:09:21,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20070 states to 20070 states and 30716 transitions. [2022-12-14 13:09:21,672 INFO L78 Accepts]: Start accepts. Automaton has 20070 states and 30716 transitions. Word has length 366 [2022-12-14 13:09:21,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:09:21,672 INFO L495 AbstractCegarLoop]: Abstraction has 20070 states and 30716 transitions. [2022-12-14 13:09:21,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 14.0) internal successors, (112), 8 states have internal predecessors, (112), 4 states have call successors, (38), 3 states have call predecessors, (38), 5 states have return successors, (38), 4 states have call predecessors, (38), 4 states have call successors, (38) [2022-12-14 13:09:21,672 INFO L276 IsEmpty]: Start isEmpty. Operand 20070 states and 30716 transitions. [2022-12-14 13:09:21,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2022-12-14 13:09:21,683 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:09:21,683 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 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] [2022-12-14 13:09:21,692 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a47a94-6bc7-46f9-a147-d1e81b2bbda2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-12-14 13:09:21,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a47a94-6bc7-46f9-a147-d1e81b2bbda2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-12-14 13:09:21,884 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:09:21,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:09:21,885 INFO L85 PathProgramCache]: Analyzing trace with hash -200262481, now seen corresponding path program 1 times [2022-12-14 13:09:21,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:09:21,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605321437] [2022-12-14 13:09:21,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:09:21,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:09:21,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:09:23,479 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 27 proven. 52 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2022-12-14 13:09:23,479 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:09:23,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605321437] [2022-12-14 13:09:23,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605321437] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:09:23,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224792751] [2022-12-14 13:09:23,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:09:23,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:09:23,480 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a47a94-6bc7-46f9-a147-d1e81b2bbda2/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:09:23,480 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a47a94-6bc7-46f9-a147-d1e81b2bbda2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:09:23,481 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a47a94-6bc7-46f9-a147-d1e81b2bbda2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-14 13:09:23,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:09:23,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 3079 conjuncts, 27 conjunts are in the unsatisfiable core [2022-12-14 13:09:23,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:09:24,468 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 116 proven. 0 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-12-14 13:09:24,468 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:09:24,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [224792751] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:09:24,468 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 13:09:24,468 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [25] total 36 [2022-12-14 13:09:24,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236489536] [2022-12-14 13:09:24,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:09:24,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-14 13:09:24,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:09:24,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-14 13:09:24,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=1132, Unknown=0, NotChecked=0, Total=1260 [2022-12-14 13:09:24,469 INFO L87 Difference]: Start difference. First operand 20070 states and 30716 transitions. Second operand has 13 states, 9 states have (on average 11.777777777777779) internal successors, (106), 10 states have internal predecessors, (106), 9 states have call successors, (38), 5 states have call predecessors, (38), 8 states have return successors, (36), 9 states have call predecessors, (36), 9 states have call successors, (36) [2022-12-14 13:09:32,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:09:32,270 INFO L93 Difference]: Finished difference Result 31323 states and 48564 transitions. [2022-12-14 13:09:32,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-12-14 13:09:32,271 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 9 states have (on average 11.777777777777779) internal successors, (106), 10 states have internal predecessors, (106), 9 states have call successors, (38), 5 states have call predecessors, (38), 8 states have return successors, (36), 9 states have call predecessors, (36), 9 states have call successors, (36) Word has length 235 [2022-12-14 13:09:32,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:09:32,386 INFO L225 Difference]: With dead ends: 31323 [2022-12-14 13:09:32,386 INFO L226 Difference]: Without dead ends: 31017 [2022-12-14 13:09:32,410 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 552 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=250, Invalid=2006, Unknown=0, NotChecked=0, Total=2256 [2022-12-14 13:09:32,410 INFO L413 NwaCegarLoop]: 374 mSDtfsCounter, 2995 mSDsluCounter, 1458 mSDsCounter, 0 mSdLazyCounter, 5404 mSolverCounterSat, 1529 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3156 SdHoareTripleChecker+Valid, 1832 SdHoareTripleChecker+Invalid, 6933 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1529 IncrementalHoareTripleChecker+Valid, 5404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2022-12-14 13:09:32,410 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3156 Valid, 1832 Invalid, 6933 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1529 Valid, 5404 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2022-12-14 13:09:32,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31017 states. [2022-12-14 13:09:35,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31017 to 28895. [2022-12-14 13:09:35,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28895 states, 19847 states have (on average 1.457348717690331) internal successors, (28924), 21079 states have internal predecessors, (28924), 6876 states have call successors, (6876), 1973 states have call predecessors, (6876), 2171 states have return successors, (8727), 6136 states have call predecessors, (8727), 6842 states have call successors, (8727) [2022-12-14 13:09:35,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28895 states to 28895 states and 44527 transitions. [2022-12-14 13:09:35,214 INFO L78 Accepts]: Start accepts. Automaton has 28895 states and 44527 transitions. Word has length 235 [2022-12-14 13:09:35,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:09:35,215 INFO L495 AbstractCegarLoop]: Abstraction has 28895 states and 44527 transitions. [2022-12-14 13:09:35,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 9 states have (on average 11.777777777777779) internal successors, (106), 10 states have internal predecessors, (106), 9 states have call successors, (38), 5 states have call predecessors, (38), 8 states have return successors, (36), 9 states have call predecessors, (36), 9 states have call successors, (36) [2022-12-14 13:09:35,215 INFO L276 IsEmpty]: Start isEmpty. Operand 28895 states and 44527 transitions. [2022-12-14 13:09:35,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2022-12-14 13:09:35,229 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:09:35,229 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 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] [2022-12-14 13:09:35,238 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a47a94-6bc7-46f9-a147-d1e81b2bbda2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-12-14 13:09:35,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a47a94-6bc7-46f9-a147-d1e81b2bbda2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:09:35,431 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:09:35,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:09:35,432 INFO L85 PathProgramCache]: Analyzing trace with hash 936538471, now seen corresponding path program 1 times [2022-12-14 13:09:35,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:09:35,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306625760] [2022-12-14 13:09:35,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:09:35,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:09:35,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:09:36,950 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 57 proven. 25 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2022-12-14 13:09:36,950 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:09:36,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306625760] [2022-12-14 13:09:36,951 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306625760] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:09:36,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505869529] [2022-12-14 13:09:36,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:09:36,951 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:09:36,951 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a47a94-6bc7-46f9-a147-d1e81b2bbda2/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:09:36,952 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a47a94-6bc7-46f9-a147-d1e81b2bbda2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:09:36,952 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a47a94-6bc7-46f9-a147-d1e81b2bbda2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-12-14 13:09:37,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:09:37,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 3079 conjuncts, 49 conjunts are in the unsatisfiable core [2022-12-14 13:09:37,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:09:37,776 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 95 proven. 0 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2022-12-14 13:09:37,776 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:09:37,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1505869529] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:09:37,776 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 13:09:37,776 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [19] total 22 [2022-12-14 13:09:37,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104072066] [2022-12-14 13:09:37,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:09:37,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-14 13:09:37,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:09:37,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-14 13:09:37,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2022-12-14 13:09:37,777 INFO L87 Difference]: Start difference. First operand 28895 states and 44527 transitions. Second operand has 12 states, 9 states have (on average 11.0) internal successors, (99), 10 states have internal predecessors, (99), 6 states have call successors, (36), 3 states have call predecessors, (36), 7 states have return successors, (34), 7 states have call predecessors, (34), 6 states have call successors, (34) [2022-12-14 13:09:42,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:09:42,414 INFO L93 Difference]: Finished difference Result 41461 states and 64330 transitions. [2022-12-14 13:09:42,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-14 13:09:42,415 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 9 states have (on average 11.0) internal successors, (99), 10 states have internal predecessors, (99), 6 states have call successors, (36), 3 states have call predecessors, (36), 7 states have return successors, (34), 7 states have call predecessors, (34), 6 states have call successors, (34) Word has length 235 [2022-12-14 13:09:42,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:09:42,533 INFO L225 Difference]: With dead ends: 41461 [2022-12-14 13:09:42,533 INFO L226 Difference]: Without dead ends: 29612 [2022-12-14 13:09:42,591 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 241 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=116, Invalid=754, Unknown=0, NotChecked=0, Total=870 [2022-12-14 13:09:42,591 INFO L413 NwaCegarLoop]: 203 mSDtfsCounter, 713 mSDsluCounter, 1062 mSDsCounter, 0 mSdLazyCounter, 3869 mSolverCounterSat, 378 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 713 SdHoareTripleChecker+Valid, 1265 SdHoareTripleChecker+Invalid, 4247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 378 IncrementalHoareTripleChecker+Valid, 3869 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-12-14 13:09:42,591 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [713 Valid, 1265 Invalid, 4247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [378 Valid, 3869 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-12-14 13:09:42,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29612 states. [2022-12-14 13:09:45,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29612 to 28983. [2022-12-14 13:09:45,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28983 states, 20013 states have (on average 1.4511067805926148) internal successors, (29041), 21170 states have internal predecessors, (29041), 6758 states have call successors, (6758), 1973 states have call predecessors, (6758), 2211 states have return successors, (8725), 6127 states have call predecessors, (8725), 6724 states have call successors, (8725) [2022-12-14 13:09:45,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28983 states to 28983 states and 44524 transitions. [2022-12-14 13:09:45,808 INFO L78 Accepts]: Start accepts. Automaton has 28983 states and 44524 transitions. Word has length 235 [2022-12-14 13:09:45,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:09:45,808 INFO L495 AbstractCegarLoop]: Abstraction has 28983 states and 44524 transitions. [2022-12-14 13:09:45,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 9 states have (on average 11.0) internal successors, (99), 10 states have internal predecessors, (99), 6 states have call successors, (36), 3 states have call predecessors, (36), 7 states have return successors, (34), 7 states have call predecessors, (34), 6 states have call successors, (34) [2022-12-14 13:09:45,808 INFO L276 IsEmpty]: Start isEmpty. Operand 28983 states and 44524 transitions. [2022-12-14 13:09:45,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2022-12-14 13:09:45,858 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:09:45,858 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:09:45,866 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a47a94-6bc7-46f9-a147-d1e81b2bbda2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-12-14 13:09:46,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a47a94-6bc7-46f9-a147-d1e81b2bbda2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:09:46,060 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:09:46,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:09:46,061 INFO L85 PathProgramCache]: Analyzing trace with hash -1028098492, now seen corresponding path program 1 times [2022-12-14 13:09:46,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:09:46,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028262406] [2022-12-14 13:09:46,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:09:46,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:09:46,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:09:46,291 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 27 proven. 22 refuted. 0 times theorem prover too weak. 206 trivial. 0 not checked. [2022-12-14 13:09:46,291 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:09:46,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028262406] [2022-12-14 13:09:46,291 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028262406] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:09:46,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1283324370] [2022-12-14 13:09:46,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:09:46,291 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:09:46,292 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a47a94-6bc7-46f9-a147-d1e81b2bbda2/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:09:46,292 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a47a94-6bc7-46f9-a147-d1e81b2bbda2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:09:46,293 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a47a94-6bc7-46f9-a147-d1e81b2bbda2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-12-14 13:09:46,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:09:46,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 3176 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-14 13:09:46,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:09:47,001 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 94 proven. 1 refuted. 0 times theorem prover too weak. 160 trivial. 0 not checked. [2022-12-14 13:09:47,002 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:09:47,787 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 27 proven. 23 refuted. 0 times theorem prover too weak. 205 trivial. 0 not checked. [2022-12-14 13:09:47,787 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1283324370] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:09:47,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1635589128] [2022-12-14 13:09:47,790 INFO L159 IcfgInterpreter]: Started Sifa with 138 locations of interest [2022-12-14 13:09:47,790 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:09:47,790 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:09:47,790 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:09:47,790 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:09:54,863 INFO L197 IcfgInterpreter]: Interpreting procedure cleanup with input of size 572 for LOIs [2022-12-14 13:09:55,316 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 42 for LOIs [2022-12-14 13:09:55,611 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift__wrappee__executivefloor with input of size 183 for LOIs [2022-12-14 13:09:56,510 INFO L197 IcfgInterpreter]: Interpreting procedure isPersonOnFloor with input of size 39 for LOIs [2022-12-14 13:09:56,514 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedAtCurrentFloor__wrappee__empty with input of size 35 for LOIs [2022-12-14 13:09:56,560 INFO L197 IcfgInterpreter]: Interpreting procedure areDoorsOpen with input of size 66 for LOIs [2022-12-14 13:09:56,570 INFO L197 IcfgInterpreter]: Interpreting procedure isExecutiveFloorCalling with input of size 63 for LOIs [2022-12-14 13:09:56,656 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 51 for LOIs [2022-12-14 13:09:56,667 INFO L197 IcfgInterpreter]: Interpreting procedure leaveElevator with input of size 73 for LOIs [2022-12-14 13:09:56,858 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 35 for LOIs [2022-12-14 13:09:56,859 INFO L197 IcfgInterpreter]: Interpreting procedure bigMacCall with input of size 579 for LOIs [2022-12-14 13:10:01,615 INFO L197 IcfgInterpreter]: Interpreting procedure getWeight with input of size 40 for LOIs [2022-12-14 13:10:01,626 INFO L197 IcfgInterpreter]: Interpreting procedure getDestination with input of size 39 for LOIs [2022-12-14 13:10:01,636 INFO L197 IcfgInterpreter]: Interpreting procedure bobCall with input of size 525 for LOIs [2022-12-14 13:10:03,904 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 798 for LOIs [2022-12-14 13:11:33,063 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 651 for LOIs [2022-12-14 13:11:33,521 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:11:43,601 WARN L233 SmtUtils]: Spent 5.03s on a formula simplification. DAG size of input: 651 DAG size of output: 523 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 13:11:49,659 WARN L233 SmtUtils]: Spent 5.82s on a formula simplification. DAG size of input: 691 DAG size of output: 537 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 13:12:09,912 WARN L233 SmtUtils]: Spent 11.00s on a formula simplification. DAG size of input: 798 DAG size of output: 732 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 13:12:28,150 WARN L233 SmtUtils]: Spent 16.15s on a formula simplification. DAG size of input: 1007 DAG size of output: 640 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 13:13:02,149 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '758700#(and (<= |old(~doorState~0)| 2147483647) (= ~executiveFloor~0 4) (< ~maximumWeight~0 ~weight~0) (= ~currentFloorID~0 |timeShift___utac_acc__Specification14_spec__1_~tmp~0#1|) (<= 0 |old(~weight~0)|) (= ~doorState~0 |timeShift_~tmp~13#1|) (<= 0 (+ |old(~doorState~0)| 2147483648)) (= |timeShift_isExecutiveFloor_~floorID#1| |timeShift_isExecutiveFloor_#in~floorID#1|) (<= |timeShift_isExecutiveFloor_~retValue_acc~21#1| 0) (= ~head~0.offset 0) (= ~blocked~0 1) (<= 0 (+ 2147483648 |timeShift___utac_acc__Specification14_spec__1_~tmp___2~0#1|)) (= ~doorState~0 |timeShift___utac_acc__Specification14_spec__1_~tmp___1~0#1|) (<= 0 |old(~blocked~0)|) (= |timeShift___utac_acc__Specification14_spec__1_~tmp~0#1| |timeShift_isExecutiveFloor_#in~floorID#1|) (= |timeShift_isExecutiveFloor_#res#1| |timeShift___utac_acc__Specification14_spec__1_~tmp___0~0#1|) (<= 0 (+ |timeShift_isExecutiveFloor_~floorID#1| 2147483648)) (<= |old(~blocked~0)| 1) (<= |timeShift___utac_acc__Specification14_spec__1_~tmp___2~0#1| 2147483647) (= ~head~0.base 0) (= |#NULL.offset| 0) (<= ~doorState~0 2147483647) (<= 0 (+ 2147483648 |timeShift_~tmp~13#1|)) (= |timeShift_isExecutiveFloor_~retValue_acc~21#1| (ite (= ~executiveFloor~0 |timeShift_isExecutiveFloor_~floorID#1|) 1 0)) (not (= |timeShift_~tmp~13#1| 0)) (<= |timeShift_isExecutiveFloor_#in~floorID#1| 2147483647) (= |timeShift___utac_acc__Specification14_spec__1_~tmp___0~0#1| 0) (<= 0 |#StackHeapBarrier|) (= ~maximumWeight~0 100) (= ~cleanupTimeShifts~0 12) (not (= |timeShift___utac_acc__Specification14_spec__1_~tmp___2~0#1| 0)) (= |#NULL.base| 0))' at error location [2022-12-14 13:13:02,149 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:13:02,149 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:13:02,149 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 9, 8] total 17 [2022-12-14 13:13:02,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577785291] [2022-12-14 13:13:02,150 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:13:02,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-14 13:13:02,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:13:02,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-14 13:13:02,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=571, Invalid=7085, Unknown=0, NotChecked=0, Total=7656 [2022-12-14 13:13:02,151 INFO L87 Difference]: Start difference. First operand 28983 states and 44524 transitions. Second operand has 17 states, 15 states have (on average 15.133333333333333) internal successors, (227), 15 states have internal predecessors, (227), 11 states have call successors, (96), 7 states have call predecessors, (96), 9 states have return successors, (94), 13 states have call predecessors, (94), 11 states have call successors, (94) [2022-12-14 13:13:29,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:13:29,425 INFO L93 Difference]: Finished difference Result 101727 states and 161852 transitions. [2022-12-14 13:13:29,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-12-14 13:13:29,426 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 15.133333333333333) internal successors, (227), 15 states have internal predecessors, (227), 11 states have call successors, (96), 7 states have call predecessors, (96), 9 states have return successors, (94), 13 states have call predecessors, (94), 11 states have call successors, (94) Word has length 247 [2022-12-14 13:13:29,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:13:29,734 INFO L225 Difference]: With dead ends: 101727 [2022-12-14 13:13:29,734 INFO L226 Difference]: Without dead ends: 65922 [2022-12-14 13:13:29,912 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 839 GetRequests, 674 SyntacticMatches, 14 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9852 ImplicationChecksByTransitivity, 91.3s TimeCoverageRelationStatistics Valid=1466, Invalid=21790, Unknown=0, NotChecked=0, Total=23256 [2022-12-14 13:13:29,913 INFO L413 NwaCegarLoop]: 1257 mSDtfsCounter, 7628 mSDsluCounter, 6178 mSDsCounter, 0 mSdLazyCounter, 23685 mSolverCounterSat, 8494 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7779 SdHoareTripleChecker+Valid, 7435 SdHoareTripleChecker+Invalid, 32179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 8494 IncrementalHoareTripleChecker+Valid, 23685 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.2s IncrementalHoareTripleChecker+Time [2022-12-14 13:13:29,913 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7779 Valid, 7435 Invalid, 32179 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [8494 Valid, 23685 Invalid, 0 Unknown, 0 Unchecked, 14.2s Time] [2022-12-14 13:13:29,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65922 states. [2022-12-14 13:13:36,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65922 to 56809. [2022-12-14 13:13:36,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56809 states, 38686 states have (on average 1.4439849040996744) internal successors, (55862), 41319 states have internal predecessors, (55862), 13845 states have call successors, (13845), 3696 states have call predecessors, (13845), 4277 states have return successors, (18476), 12588 states have call predecessors, (18476), 13789 states have call successors, (18476) [2022-12-14 13:13:36,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56809 states to 56809 states and 88183 transitions. [2022-12-14 13:13:36,577 INFO L78 Accepts]: Start accepts. Automaton has 56809 states and 88183 transitions. Word has length 247 [2022-12-14 13:13:36,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:13:36,577 INFO L495 AbstractCegarLoop]: Abstraction has 56809 states and 88183 transitions. [2022-12-14 13:13:36,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 15.133333333333333) internal successors, (227), 15 states have internal predecessors, (227), 11 states have call successors, (96), 7 states have call predecessors, (96), 9 states have return successors, (94), 13 states have call predecessors, (94), 11 states have call successors, (94) [2022-12-14 13:13:36,577 INFO L276 IsEmpty]: Start isEmpty. Operand 56809 states and 88183 transitions. [2022-12-14 13:13:36,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2022-12-14 13:13:36,592 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:13:36,592 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:13:36,601 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a47a94-6bc7-46f9-a147-d1e81b2bbda2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-12-14 13:13:36,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a47a94-6bc7-46f9-a147-d1e81b2bbda2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-12-14 13:13:36,795 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:13:36,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:13:36,796 INFO L85 PathProgramCache]: Analyzing trace with hash -2128289766, now seen corresponding path program 1 times [2022-12-14 13:13:36,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:13:36,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788657100] [2022-12-14 13:13:36,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:13:36,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:13:36,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:13:37,027 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 27 proven. 22 refuted. 0 times theorem prover too weak. 206 trivial. 0 not checked. [2022-12-14 13:13:37,027 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:13:37,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788657100] [2022-12-14 13:13:37,027 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788657100] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:13:37,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441251026] [2022-12-14 13:13:37,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:13:37,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:13:37,028 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a47a94-6bc7-46f9-a147-d1e81b2bbda2/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:13:37,028 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a47a94-6bc7-46f9-a147-d1e81b2bbda2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:13:37,029 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a47a94-6bc7-46f9-a147-d1e81b2bbda2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-12-14 13:13:37,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:13:37,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 3176 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-14 13:13:37,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:13:37,772 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 94 proven. 1 refuted. 0 times theorem prover too weak. 160 trivial. 0 not checked. [2022-12-14 13:13:37,772 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:13:38,689 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 27 proven. 23 refuted. 0 times theorem prover too weak. 205 trivial. 0 not checked. [2022-12-14 13:13:38,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [441251026] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:13:38,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1958779242] [2022-12-14 13:13:38,691 INFO L159 IcfgInterpreter]: Started Sifa with 138 locations of interest [2022-12-14 13:13:38,691 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:13:38,691 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:13:38,691 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:13:38,691 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:13:45,753 INFO L197 IcfgInterpreter]: Interpreting procedure cleanup with input of size 572 for LOIs [2022-12-14 13:13:46,206 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 42 for LOIs [2022-12-14 13:13:46,485 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift__wrappee__executivefloor with input of size 183 for LOIs [2022-12-14 13:13:47,401 INFO L197 IcfgInterpreter]: Interpreting procedure isPersonOnFloor with input of size 34 for LOIs [2022-12-14 13:13:47,405 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedAtCurrentFloor__wrappee__empty with input of size 35 for LOIs [2022-12-14 13:13:47,459 INFO L197 IcfgInterpreter]: Interpreting procedure areDoorsOpen with input of size 66 for LOIs [2022-12-14 13:13:47,469 INFO L197 IcfgInterpreter]: Interpreting procedure isExecutiveFloorCalling with input of size 63 for LOIs [2022-12-14 13:13:47,565 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 51 for LOIs [2022-12-14 13:13:47,577 INFO L197 IcfgInterpreter]: Interpreting procedure leaveElevator with input of size 77 for LOIs [2022-12-14 13:13:47,795 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 35 for LOIs [2022-12-14 13:13:47,797 INFO L197 IcfgInterpreter]: Interpreting procedure bigMacCall with input of size 579 for LOIs [2022-12-14 13:13:51,134 INFO L197 IcfgInterpreter]: Interpreting procedure getWeight with input of size 47 for LOIs [2022-12-14 13:13:51,145 INFO L197 IcfgInterpreter]: Interpreting procedure getDestination with input of size 45 for LOIs [2022-12-14 13:13:51,156 INFO L197 IcfgInterpreter]: Interpreting procedure bobCall with input of size 525 for LOIs [2022-12-14 13:13:53,473 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 798 for LOIs [2022-12-14 13:14:10,454 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 651 for LOIs [2022-12-14 13:14:10,912 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:14:20,556 WARN L233 SmtUtils]: Spent 5.31s on a formula simplification. DAG size of input: 651 DAG size of output: 523 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 13:14:27,065 WARN L233 SmtUtils]: Spent 6.27s on a formula simplification. DAG size of input: 691 DAG size of output: 537 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 13:14:48,427 WARN L233 SmtUtils]: Spent 11.00s on a formula simplification. DAG size of input: 798 DAG size of output: 732 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 13:15:04,493 WARN L233 SmtUtils]: Spent 15.36s on a formula simplification. DAG size of input: 890 DAG size of output: 657 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 13:15:37,175 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '977772#(and (<= |old(~doorState~0)| 2147483647) (= ~executiveFloor~0 4) (< ~maximumWeight~0 ~weight~0) (= ~currentFloorID~0 |timeShift___utac_acc__Specification14_spec__1_~tmp~0#1|) (<= 0 |old(~weight~0)|) (= ~doorState~0 |timeShift_~tmp~13#1|) (<= 0 (+ |old(~doorState~0)| 2147483648)) (= |timeShift_isExecutiveFloor_~floorID#1| |timeShift_isExecutiveFloor_#in~floorID#1|) (<= |timeShift_isExecutiveFloor_~retValue_acc~21#1| 0) (= ~head~0.offset 0) (= ~blocked~0 1) (<= 0 (+ 2147483648 |timeShift___utac_acc__Specification14_spec__1_~tmp___2~0#1|)) (= ~doorState~0 |timeShift___utac_acc__Specification14_spec__1_~tmp___1~0#1|) (<= 0 |old(~blocked~0)|) (= |timeShift___utac_acc__Specification14_spec__1_~tmp~0#1| |timeShift_isExecutiveFloor_#in~floorID#1|) (= |timeShift_isExecutiveFloor_#res#1| |timeShift___utac_acc__Specification14_spec__1_~tmp___0~0#1|) (<= 0 (+ |timeShift_isExecutiveFloor_~floorID#1| 2147483648)) (<= |old(~blocked~0)| 1) (<= |timeShift___utac_acc__Specification14_spec__1_~tmp___2~0#1| 2147483647) (= ~head~0.base 0) (= |#NULL.offset| 0) (<= ~doorState~0 2147483647) (<= 0 (+ 2147483648 |timeShift_~tmp~13#1|)) (= |timeShift_isExecutiveFloor_~retValue_acc~21#1| (ite (= ~executiveFloor~0 |timeShift_isExecutiveFloor_~floorID#1|) 1 0)) (not (= |timeShift_~tmp~13#1| 0)) (<= |timeShift_isExecutiveFloor_#in~floorID#1| 2147483647) (= |timeShift___utac_acc__Specification14_spec__1_~tmp___0~0#1| 0) (<= 0 |#StackHeapBarrier|) (= ~maximumWeight~0 100) (= ~cleanupTimeShifts~0 12) (not (= |timeShift___utac_acc__Specification14_spec__1_~tmp___2~0#1| 0)) (= |#NULL.base| 0))' at error location [2022-12-14 13:15:37,175 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:15:37,175 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:15:37,175 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 9, 8] total 18 [2022-12-14 13:15:37,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842495183] [2022-12-14 13:15:37,175 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:15:37,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-14 13:15:37,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:15:37,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-14 13:15:37,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=608, Invalid=7224, Unknown=0, NotChecked=0, Total=7832 [2022-12-14 13:15:37,177 INFO L87 Difference]: Start difference. First operand 56809 states and 88183 transitions. Second operand has 18 states, 16 states have (on average 14.375) internal successors, (230), 16 states have internal predecessors, (230), 12 states have call successors, (96), 7 states have call predecessors, (96), 9 states have return successors, (94), 14 states have call predecessors, (94), 12 states have call successors, (94)