./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec3_product03.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b0a25a5-ced8-42b4-ac3f-92a03c866488/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b0a25a5-ced8-42b4-ac3f-92a03c866488/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_5b0a25a5-ced8-42b4-ac3f-92a03c866488/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b0a25a5-ced8-42b4-ac3f-92a03c866488/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec3_product03.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b0a25a5-ced8-42b4-ac3f-92a03c866488/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_5b0a25a5-ced8-42b4-ac3f-92a03c866488/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 ec740d4c0b0b941516a7691cfe22f258e1a0e4fdd205bb4a0c04151c297a8c86 --- 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 11:15:18,225 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 11:15:18,226 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 11:15:18,238 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 11:15:18,238 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 11:15:18,239 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 11:15:18,240 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 11:15:18,241 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 11:15:18,242 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 11:15:18,242 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 11:15:18,243 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 11:15:18,244 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 11:15:18,244 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 11:15:18,244 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 11:15:18,245 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 11:15:18,246 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 11:15:18,246 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 11:15:18,247 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 11:15:18,248 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 11:15:18,249 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 11:15:18,250 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 11:15:18,251 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 11:15:18,252 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 11:15:18,252 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 11:15:18,254 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 11:15:18,254 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 11:15:18,254 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 11:15:18,255 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 11:15:18,255 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 11:15:18,256 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 11:15:18,256 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 11:15:18,257 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 11:15:18,257 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 11:15:18,257 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 11:15:18,258 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 11:15:18,258 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 11:15:18,259 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 11:15:18,259 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 11:15:18,259 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 11:15:18,259 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 11:15:18,260 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 11:15:18,261 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b0a25a5-ced8-42b4-ac3f-92a03c866488/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 11:15:18,281 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 11:15:18,281 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 11:15:18,282 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 11:15:18,287 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 11:15:18,287 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 11:15:18,288 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 11:15:18,288 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 11:15:18,288 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 11:15:18,288 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 11:15:18,288 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 11:15:18,289 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 11:15:18,289 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 11:15:18,289 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 11:15:18,289 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 11:15:18,289 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 11:15:18,290 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 11:15:18,290 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 11:15:18,290 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 11:15:18,291 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 11:15:18,291 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 11:15:18,291 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 11:15:18,291 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 11:15:18,291 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 11:15:18,292 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 11:15:18,292 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 11:15:18,292 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 11:15:18,292 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 11:15:18,292 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 11:15:18,293 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 11:15:18,293 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 11:15:18,293 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 11:15:18,293 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 11:15:18,293 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 11:15:18,294 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 11:15:18,294 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 11:15:18,294 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 11:15:18,294 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 11:15:18,294 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 11:15:18,294 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 11:15:18,295 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 11:15:18,295 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 11:15:18,295 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_5b0a25a5-ced8-42b4-ac3f-92a03c866488/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b0a25a5-ced8-42b4-ac3f-92a03c866488/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ec740d4c0b0b941516a7691cfe22f258e1a0e4fdd205bb4a0c04151c297a8c86 [2022-12-14 11:15:18,460 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 11:15:18,480 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 11:15:18,482 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 11:15:18,483 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 11:15:18,484 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 11:15:18,485 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b0a25a5-ced8-42b4-ac3f-92a03c866488/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/product-lines/elevator_spec3_product03.cil.c [2022-12-14 11:15:21,091 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 11:15:21,301 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 11:15:21,301 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b0a25a5-ced8-42b4-ac3f-92a03c866488/sv-benchmarks/c/product-lines/elevator_spec3_product03.cil.c [2022-12-14 11:15:21,314 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b0a25a5-ced8-42b4-ac3f-92a03c866488/bin/utaipan-gh47qXpMRh/data/570e115fd/abec94757f0f4ae3b7a2a4e9bfdb1ff1/FLAG537ee45b0 [2022-12-14 11:15:21,328 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b0a25a5-ced8-42b4-ac3f-92a03c866488/bin/utaipan-gh47qXpMRh/data/570e115fd/abec94757f0f4ae3b7a2a4e9bfdb1ff1 [2022-12-14 11:15:21,330 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 11:15:21,332 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 11:15:21,333 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 11:15:21,333 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 11:15:21,336 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 11:15:21,337 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 11:15:21" (1/1) ... [2022-12-14 11:15:21,337 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3b0c8da8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:15:21, skipping insertion in model container [2022-12-14 11:15:21,338 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 11:15:21" (1/1) ... [2022-12-14 11:15:21,343 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 11:15:21,395 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 11:15:21,653 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_5b0a25a5-ced8-42b4-ac3f-92a03c866488/sv-benchmarks/c/product-lines/elevator_spec3_product03.cil.c[33356,33369] [2022-12-14 11:15:21,733 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 11:15:21,741 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 11:15:21,776 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_5b0a25a5-ced8-42b4-ac3f-92a03c866488/sv-benchmarks/c/product-lines/elevator_spec3_product03.cil.c[33356,33369] [2022-12-14 11:15:21,806 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 11:15:21,833 INFO L208 MainTranslator]: Completed translation [2022-12-14 11:15:21,834 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:15:21 WrapperNode [2022-12-14 11:15:21,834 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 11:15:21,842 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 11:15:21,842 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 11:15:21,842 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 11:15:21,848 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:15:21" (1/1) ... [2022-12-14 11:15:21,871 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:15:21" (1/1) ... [2022-12-14 11:15:21,917 INFO L138 Inliner]: procedures = 90, calls = 342, calls flagged for inlining = 21, calls inlined = 18, statements flattened = 1043 [2022-12-14 11:15:21,917 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 11:15:21,918 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 11:15:21,918 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 11:15:21,918 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 11:15:21,928 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:15:21" (1/1) ... [2022-12-14 11:15:21,928 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:15:21" (1/1) ... [2022-12-14 11:15:21,934 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:15:21" (1/1) ... [2022-12-14 11:15:21,934 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:15:21" (1/1) ... [2022-12-14 11:15:21,953 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:15:21" (1/1) ... [2022-12-14 11:15:21,965 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:15:21" (1/1) ... [2022-12-14 11:15:21,968 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:15:21" (1/1) ... [2022-12-14 11:15:21,972 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:15:21" (1/1) ... [2022-12-14 11:15:21,977 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 11:15:21,978 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 11:15:21,978 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 11:15:21,978 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 11:15:21,979 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:15:21" (1/1) ... [2022-12-14 11:15:21,984 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 11:15:21,993 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b0a25a5-ced8-42b4-ac3f-92a03c866488/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:15:22,003 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b0a25a5-ced8-42b4-ac3f-92a03c866488/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 11:15:22,005 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b0a25a5-ced8-42b4-ac3f-92a03c866488/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 11:15:22,030 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 11:15:22,031 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2022-12-14 11:15:22,031 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2022-12-14 11:15:22,031 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2022-12-14 11:15:22,031 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2022-12-14 11:15:22,031 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2022-12-14 11:15:22,031 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2022-12-14 11:15:22,031 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2022-12-14 11:15:22,031 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2022-12-14 11:15:22,031 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2022-12-14 11:15:22,031 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2022-12-14 11:15:22,032 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2022-12-14 11:15:22,032 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2022-12-14 11:15:22,032 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2022-12-14 11:15:22,032 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2022-12-14 11:15:22,032 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2022-12-14 11:15:22,032 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2022-12-14 11:15:22,032 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2022-12-14 11:15:22,032 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2022-12-14 11:15:22,032 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2022-12-14 11:15:22,032 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2022-12-14 11:15:22,032 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2022-12-14 11:15:22,033 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2022-12-14 11:15:22,033 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2022-12-14 11:15:22,033 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2022-12-14 11:15:22,033 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2022-12-14 11:15:22,033 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2022-12-14 11:15:22,033 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2022-12-14 11:15:22,033 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2022-12-14 11:15:22,033 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2022-12-14 11:15:22,033 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2022-12-14 11:15:22,033 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2022-12-14 11:15:22,033 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2022-12-14 11:15:22,034 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2022-12-14 11:15:22,034 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2022-12-14 11:15:22,034 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2022-12-14 11:15:22,034 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2022-12-14 11:15:22,034 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2022-12-14 11:15:22,034 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2022-12-14 11:15:22,034 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2022-12-14 11:15:22,034 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2022-12-14 11:15:22,034 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__base [2022-12-14 11:15:22,034 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__base [2022-12-14 11:15:22,034 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 11:15:22,035 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2022-12-14 11:15:22,035 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2022-12-14 11:15:22,035 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2022-12-14 11:15:22,035 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2022-12-14 11:15:22,035 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2022-12-14 11:15:22,035 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2022-12-14 11:15:22,035 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2022-12-14 11:15:22,035 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2022-12-14 11:15:22,035 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 11:15:22,035 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 11:15:22,035 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2022-12-14 11:15:22,036 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2022-12-14 11:15:22,149 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 11:15:22,152 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 11:15:22,917 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 11:15:23,440 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 11:15:23,440 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-12-14 11:15:23,443 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 11:15:23 BoogieIcfgContainer [2022-12-14 11:15:23,443 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 11:15:23,445 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 11:15:23,445 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 11:15:23,448 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 11:15:23,448 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 11:15:21" (1/3) ... [2022-12-14 11:15:23,448 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d0aab09 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 11:15:23, skipping insertion in model container [2022-12-14 11:15:23,449 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:15:21" (2/3) ... [2022-12-14 11:15:23,449 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d0aab09 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 11:15:23, skipping insertion in model container [2022-12-14 11:15:23,449 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 11:15:23" (3/3) ... [2022-12-14 11:15:23,451 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec3_product03.cil.c [2022-12-14 11:15:23,468 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 11:15:23,468 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 11:15:23,528 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 11:15:23,534 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;@1256babf, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 11:15:23,535 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 11:15:23,540 INFO L276 IsEmpty]: Start isEmpty. Operand has 404 states, 270 states have (on average 1.5740740740740742) internal successors, (425), 288 states have internal predecessors, (425), 106 states have call successors, (106), 26 states have call predecessors, (106), 26 states have return successors, (106), 103 states have call predecessors, (106), 106 states have call successors, (106) [2022-12-14 11:15:23,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-12-14 11:15:23,552 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:15:23,553 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:15:23,553 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:15:23,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:15:23,557 INFO L85 PathProgramCache]: Analyzing trace with hash -1981863118, now seen corresponding path program 1 times [2022-12-14 11:15:23,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:15:23,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596905392] [2022-12-14 11:15:23,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:15:23,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:15:23,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:15:24,151 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-14 11:15:24,152 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:15:24,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596905392] [2022-12-14 11:15:24,153 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596905392] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:15:24,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439264066] [2022-12-14 11:15:24,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:15:24,153 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:15:24,153 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b0a25a5-ced8-42b4-ac3f-92a03c866488/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:15:24,155 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b0a25a5-ced8-42b4-ac3f-92a03c866488/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:15:24,156 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b0a25a5-ced8-42b4-ac3f-92a03c866488/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 11:15:24,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:15:24,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 1594 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 11:15:24,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:15:24,568 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 11:15:24,569 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:15:24,569 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [439264066] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:15:24,569 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 11:15:24,569 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2022-12-14 11:15:24,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224868240] [2022-12-14 11:15:24,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:15:24,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 11:15:24,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:15:24,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 11:15:24,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-12-14 11:15:24,610 INFO L87 Difference]: Start difference. First operand has 404 states, 270 states have (on average 1.5740740740740742) internal successors, (425), 288 states have internal predecessors, (425), 106 states have call successors, (106), 26 states have call predecessors, (106), 26 states have return successors, (106), 103 states have call predecessors, (106), 106 states have call successors, (106) Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2022-12-14 11:15:24,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:15:24,843 INFO L93 Difference]: Finished difference Result 1135 states and 1815 transitions. [2022-12-14 11:15:24,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 11:15:24,846 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 87 [2022-12-14 11:15:24,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:15:24,862 INFO L225 Difference]: With dead ends: 1135 [2022-12-14 11:15:24,862 INFO L226 Difference]: Without dead ends: 733 [2022-12-14 11:15:24,870 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-12-14 11:15:24,873 INFO L413 NwaCegarLoop]: 703 mSDtfsCounter, 506 mSDsluCounter, 583 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 506 SdHoareTripleChecker+Valid, 1286 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 11:15:24,874 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [506 Valid, 1286 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 11:15:24,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 733 states. [2022-12-14 11:15:24,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 733 to 721. [2022-12-14 11:15:24,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 721 states, 487 states have (on average 1.566735112936345) internal successors, (763), 518 states have internal predecessors, (763), 187 states have call successors, (187), 47 states have call predecessors, (187), 46 states have return successors, (189), 181 states have call predecessors, (189), 184 states have call successors, (189) [2022-12-14 11:15:24,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 721 states to 721 states and 1139 transitions. [2022-12-14 11:15:24,979 INFO L78 Accepts]: Start accepts. Automaton has 721 states and 1139 transitions. Word has length 87 [2022-12-14 11:15:24,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:15:24,979 INFO L495 AbstractCegarLoop]: Abstraction has 721 states and 1139 transitions. [2022-12-14 11:15:24,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2022-12-14 11:15:24,980 INFO L276 IsEmpty]: Start isEmpty. Operand 721 states and 1139 transitions. [2022-12-14 11:15:24,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-12-14 11:15:24,986 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:15:24,986 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:15:24,995 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b0a25a5-ced8-42b4-ac3f-92a03c866488/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 11:15:25,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b0a25a5-ced8-42b4-ac3f-92a03c866488/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:15:25,188 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:15:25,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:15:25,188 INFO L85 PathProgramCache]: Analyzing trace with hash -1498601055, now seen corresponding path program 1 times [2022-12-14 11:15:25,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:15:25,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796646289] [2022-12-14 11:15:25,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:15:25,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:15:25,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:15:25,531 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-14 11:15:25,531 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:15:25,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796646289] [2022-12-14 11:15:25,531 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796646289] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:15:25,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750196340] [2022-12-14 11:15:25,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:15:25,532 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:15:25,532 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b0a25a5-ced8-42b4-ac3f-92a03c866488/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:15:25,533 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b0a25a5-ced8-42b4-ac3f-92a03c866488/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:15:25,534 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b0a25a5-ced8-42b4-ac3f-92a03c866488/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 11:15:25,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:15:25,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 1582 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 11:15:25,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:15:25,820 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 11:15:25,820 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:15:25,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [750196340] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:15:25,820 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 11:15:25,820 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2022-12-14 11:15:25,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129359152] [2022-12-14 11:15:25,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:15:25,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 11:15:25,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:15:25,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 11:15:25,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-12-14 11:15:25,823 INFO L87 Difference]: Start difference. First operand 721 states and 1139 transitions. Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-12-14 11:15:25,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:15:25,991 INFO L93 Difference]: Finished difference Result 1765 states and 2819 transitions. [2022-12-14 11:15:25,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 11:15:25,992 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 86 [2022-12-14 11:15:25,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:15:26,000 INFO L225 Difference]: With dead ends: 1765 [2022-12-14 11:15:26,000 INFO L226 Difference]: Without dead ends: 1056 [2022-12-14 11:15:26,004 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-12-14 11:15:26,005 INFO L413 NwaCegarLoop]: 673 mSDtfsCounter, 561 mSDsluCounter, 502 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 561 SdHoareTripleChecker+Valid, 1175 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 11:15:26,006 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [561 Valid, 1175 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 11:15:26,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1056 states. [2022-12-14 11:15:26,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1056 to 1032. [2022-12-14 11:15:26,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1032 states, 701 states have (on average 1.5748930099857346) internal successors, (1104), 747 states have internal predecessors, (1104), 265 states have call successors, (265), 65 states have call predecessors, (265), 65 states have return successors, (272), 258 states have call predecessors, (272), 262 states have call successors, (272) [2022-12-14 11:15:26,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1032 states to 1032 states and 1641 transitions. [2022-12-14 11:15:26,081 INFO L78 Accepts]: Start accepts. Automaton has 1032 states and 1641 transitions. Word has length 86 [2022-12-14 11:15:26,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:15:26,082 INFO L495 AbstractCegarLoop]: Abstraction has 1032 states and 1641 transitions. [2022-12-14 11:15:26,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-12-14 11:15:26,083 INFO L276 IsEmpty]: Start isEmpty. Operand 1032 states and 1641 transitions. [2022-12-14 11:15:26,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-12-14 11:15:26,088 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:15:26,089 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:15:26,095 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b0a25a5-ced8-42b4-ac3f-92a03c866488/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 11:15:26,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b0a25a5-ced8-42b4-ac3f-92a03c866488/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:15:26,290 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:15:26,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:15:26,290 INFO L85 PathProgramCache]: Analyzing trace with hash 1195279646, now seen corresponding path program 1 times [2022-12-14 11:15:26,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:15:26,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821730062] [2022-12-14 11:15:26,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:15:26,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:15:26,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:15:26,529 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 11:15:26,529 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:15:26,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821730062] [2022-12-14 11:15:26,530 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821730062] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:15:26,530 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:15:26,530 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 11:15:26,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923677160] [2022-12-14 11:15:26,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:15:26,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 11:15:26,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:15:26,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 11:15:26,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 11:15:26,532 INFO L87 Difference]: Start difference. First operand 1032 states and 1641 transitions. Second operand has 6 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2022-12-14 11:15:27,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:15:27,367 INFO L93 Difference]: Finished difference Result 3493 states and 5724 transitions. [2022-12-14 11:15:27,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 11:15:27,368 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) Word has length 87 [2022-12-14 11:15:27,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:15:27,383 INFO L225 Difference]: With dead ends: 3493 [2022-12-14 11:15:27,383 INFO L226 Difference]: Without dead ends: 2473 [2022-12-14 11:15:27,390 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-12-14 11:15:27,391 INFO L413 NwaCegarLoop]: 969 mSDtfsCounter, 825 mSDsluCounter, 3247 mSDsCounter, 0 mSdLazyCounter, 718 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 896 SdHoareTripleChecker+Valid, 4216 SdHoareTripleChecker+Invalid, 803 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 718 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 11:15:27,391 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [896 Valid, 4216 Invalid, 803 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 718 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 11:15:27,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2473 states. [2022-12-14 11:15:27,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2473 to 1930. [2022-12-14 11:15:27,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1930 states, 1337 states have (on average 1.5818997756170532) internal successors, (2115), 1425 states have internal predecessors, (2115), 473 states have call successors, (473), 118 states have call predecessors, (473), 119 states have return successors, (520), 446 states have call predecessors, (520), 469 states have call successors, (520) [2022-12-14 11:15:27,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1930 states to 1930 states and 3108 transitions. [2022-12-14 11:15:27,482 INFO L78 Accepts]: Start accepts. Automaton has 1930 states and 3108 transitions. Word has length 87 [2022-12-14 11:15:27,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:15:27,482 INFO L495 AbstractCegarLoop]: Abstraction has 1930 states and 3108 transitions. [2022-12-14 11:15:27,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2022-12-14 11:15:27,483 INFO L276 IsEmpty]: Start isEmpty. Operand 1930 states and 3108 transitions. [2022-12-14 11:15:27,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-12-14 11:15:27,485 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:15:27,485 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:15:27,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-14 11:15:27,485 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:15:27,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:15:27,486 INFO L85 PathProgramCache]: Analyzing trace with hash -1845002897, now seen corresponding path program 1 times [2022-12-14 11:15:27,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:15:27,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112668726] [2022-12-14 11:15:27,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:15:27,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:15:27,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:15:27,676 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-14 11:15:27,677 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:15:27,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112668726] [2022-12-14 11:15:27,677 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112668726] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:15:27,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275983404] [2022-12-14 11:15:27,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:15:27,677 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:15:27,678 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b0a25a5-ced8-42b4-ac3f-92a03c866488/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:15:27,678 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b0a25a5-ced8-42b4-ac3f-92a03c866488/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:15:27,679 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b0a25a5-ced8-42b4-ac3f-92a03c866488/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 11:15:27,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:15:27,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 1595 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 11:15:27,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:15:28,040 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 11:15:28,040 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:15:28,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [275983404] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:15:28,040 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 11:15:28,041 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2022-12-14 11:15:28,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996437877] [2022-12-14 11:15:28,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:15:28,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 11:15:28,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:15:28,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 11:15:28,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-12-14 11:15:28,043 INFO L87 Difference]: Start difference. First operand 1930 states and 3108 transitions. Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 3 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 2 states have call predecessors, (15), 3 states have call successors, (15) [2022-12-14 11:15:28,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:15:28,360 INFO L93 Difference]: Finished difference Result 5530 states and 9011 transitions. [2022-12-14 11:15:28,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 11:15:28,360 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 3 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 2 states have call predecessors, (15), 3 states have call successors, (15) Word has length 88 [2022-12-14 11:15:28,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:15:28,377 INFO L225 Difference]: With dead ends: 5530 [2022-12-14 11:15:28,377 INFO L226 Difference]: Without dead ends: 3613 [2022-12-14 11:15:28,389 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-12-14 11:15:28,389 INFO L413 NwaCegarLoop]: 712 mSDtfsCounter, 493 mSDsluCounter, 520 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 493 SdHoareTripleChecker+Valid, 1232 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 11:15:28,390 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [493 Valid, 1232 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 11:15:28,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3613 states. [2022-12-14 11:15:28,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3613 to 3585. [2022-12-14 11:15:28,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3585 states, 2463 states have (on average 1.5306536743808363) internal successors, (3770), 2637 states have internal predecessors, (3770), 894 states have call successors, (894), 230 states have call predecessors, (894), 227 states have return successors, (1025), 831 states have call predecessors, (1025), 888 states have call successors, (1025) [2022-12-14 11:15:28,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3585 states to 3585 states and 5689 transitions. [2022-12-14 11:15:28,531 INFO L78 Accepts]: Start accepts. Automaton has 3585 states and 5689 transitions. Word has length 88 [2022-12-14 11:15:28,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:15:28,531 INFO L495 AbstractCegarLoop]: Abstraction has 3585 states and 5689 transitions. [2022-12-14 11:15:28,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 3 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 2 states have call predecessors, (15), 3 states have call successors, (15) [2022-12-14 11:15:28,531 INFO L276 IsEmpty]: Start isEmpty. Operand 3585 states and 5689 transitions. [2022-12-14 11:15:28,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-12-14 11:15:28,533 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:15:28,533 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:15:28,541 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b0a25a5-ced8-42b4-ac3f-92a03c866488/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 11:15:28,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b0a25a5-ced8-42b4-ac3f-92a03c866488/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-12-14 11:15:28,734 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:15:28,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:15:28,734 INFO L85 PathProgramCache]: Analyzing trace with hash 1870831545, now seen corresponding path program 1 times [2022-12-14 11:15:28,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:15:28,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854457475] [2022-12-14 11:15:28,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:15:28,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:15:28,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:15:28,937 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-12-14 11:15:28,937 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:15:28,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854457475] [2022-12-14 11:15:28,938 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854457475] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:15:28,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711440056] [2022-12-14 11:15:28,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:15:28,938 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:15:28,938 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b0a25a5-ced8-42b4-ac3f-92a03c866488/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:15:28,939 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b0a25a5-ced8-42b4-ac3f-92a03c866488/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:15:28,940 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b0a25a5-ced8-42b4-ac3f-92a03c866488/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 11:15:29,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:15:29,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 1590 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 11:15:29,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:15:29,269 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 11:15:29,269 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:15:29,269 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1711440056] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:15:29,269 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 11:15:29,270 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 12 [2022-12-14 11:15:29,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085044507] [2022-12-14 11:15:29,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:15:29,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 11:15:29,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:15:29,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 11:15:29,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2022-12-14 11:15:29,271 INFO L87 Difference]: Start difference. First operand 3585 states and 5689 transitions. Second operand has 6 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 4 states have call successors, (18), 3 states have call predecessors, (18), 4 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2022-12-14 11:15:30,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:15:30,027 INFO L93 Difference]: Finished difference Result 7326 states and 11781 transitions. [2022-12-14 11:15:30,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 11:15:30,028 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 4 states have call successors, (18), 3 states have call predecessors, (18), 4 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) Word has length 89 [2022-12-14 11:15:30,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:15:30,055 INFO L225 Difference]: With dead ends: 7326 [2022-12-14 11:15:30,055 INFO L226 Difference]: Without dead ends: 3753 [2022-12-14 11:15:30,073 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2022-12-14 11:15:30,074 INFO L413 NwaCegarLoop]: 704 mSDtfsCounter, 638 mSDsluCounter, 2283 mSDsCounter, 0 mSdLazyCounter, 730 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 698 SdHoareTripleChecker+Valid, 2987 SdHoareTripleChecker+Invalid, 876 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 730 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 11:15:30,075 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [698 Valid, 2987 Invalid, 876 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 730 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 11:15:30,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3753 states. [2022-12-14 11:15:30,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3753 to 3735. [2022-12-14 11:15:30,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3735 states, 2503 states have (on average 1.5101877746703956) internal successors, (3780), 2725 states have internal predecessors, (3780), 1014 states have call successors, (1014), 214 states have call predecessors, (1014), 217 states have return successors, (1204), 931 states have call predecessors, (1204), 1008 states have call successors, (1204) [2022-12-14 11:15:30,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3735 states to 3735 states and 5998 transitions. [2022-12-14 11:15:30,239 INFO L78 Accepts]: Start accepts. Automaton has 3735 states and 5998 transitions. Word has length 89 [2022-12-14 11:15:30,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:15:30,239 INFO L495 AbstractCegarLoop]: Abstraction has 3735 states and 5998 transitions. [2022-12-14 11:15:30,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 4 states have call successors, (18), 3 states have call predecessors, (18), 4 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2022-12-14 11:15:30,239 INFO L276 IsEmpty]: Start isEmpty. Operand 3735 states and 5998 transitions. [2022-12-14 11:15:30,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-12-14 11:15:30,241 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:15:30,241 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:15:30,249 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b0a25a5-ced8-42b4-ac3f-92a03c866488/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 11:15:30,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b0a25a5-ced8-42b4-ac3f-92a03c866488/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:15:30,442 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:15:30,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:15:30,442 INFO L85 PathProgramCache]: Analyzing trace with hash -1865761176, now seen corresponding path program 1 times [2022-12-14 11:15:30,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:15:30,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316570151] [2022-12-14 11:15:30,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:15:30,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:15:30,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:15:30,630 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-12-14 11:15:30,630 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:15:30,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316570151] [2022-12-14 11:15:30,630 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316570151] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:15:30,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607832861] [2022-12-14 11:15:30,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:15:30,630 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:15:30,631 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b0a25a5-ced8-42b4-ac3f-92a03c866488/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:15:30,631 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b0a25a5-ced8-42b4-ac3f-92a03c866488/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:15:30,632 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b0a25a5-ced8-42b4-ac3f-92a03c866488/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 11:15:30,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:15:30,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 1578 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 11:15:30,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:15:30,934 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 11:15:30,934 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:15:30,934 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [607832861] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:15:30,934 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 11:15:30,934 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2022-12-14 11:15:30,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154363959] [2022-12-14 11:15:30,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:15:30,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 11:15:30,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:15:30,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 11:15:30,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-12-14 11:15:30,936 INFO L87 Difference]: Start difference. First operand 3735 states and 5998 transitions. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2022-12-14 11:15:31,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:15:31,224 INFO L93 Difference]: Finished difference Result 8179 states and 13214 transitions. [2022-12-14 11:15:31,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 11:15:31,224 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 88 [2022-12-14 11:15:31,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:15:31,258 INFO L225 Difference]: With dead ends: 8179 [2022-12-14 11:15:31,258 INFO L226 Difference]: Without dead ends: 4456 [2022-12-14 11:15:31,284 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-12-14 11:15:31,285 INFO L413 NwaCegarLoop]: 775 mSDtfsCounter, 559 mSDsluCounter, 499 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 559 SdHoareTripleChecker+Valid, 1274 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 11:15:31,285 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [559 Valid, 1274 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 11:15:31,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4456 states. [2022-12-14 11:15:31,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4456 to 3672. [2022-12-14 11:15:31,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3672 states, 2460 states have (on average 1.5089430894308944) internal successors, (3712), 2681 states have internal predecessors, (3712), 1002 states have call successors, (1002), 210 states have call predecessors, (1002), 209 states have return successors, (1151), 916 states have call predecessors, (1151), 996 states have call successors, (1151) [2022-12-14 11:15:31,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3672 states to 3672 states and 5865 transitions. [2022-12-14 11:15:31,466 INFO L78 Accepts]: Start accepts. Automaton has 3672 states and 5865 transitions. Word has length 88 [2022-12-14 11:15:31,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:15:31,467 INFO L495 AbstractCegarLoop]: Abstraction has 3672 states and 5865 transitions. [2022-12-14 11:15:31,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2022-12-14 11:15:31,467 INFO L276 IsEmpty]: Start isEmpty. Operand 3672 states and 5865 transitions. [2022-12-14 11:15:31,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-12-14 11:15:31,468 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:15:31,469 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:15:31,475 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b0a25a5-ced8-42b4-ac3f-92a03c866488/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 11:15:31,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b0a25a5-ced8-42b4-ac3f-92a03c866488/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:15:31,670 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:15:31,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:15:31,670 INFO L85 PathProgramCache]: Analyzing trace with hash -1020153350, now seen corresponding path program 1 times [2022-12-14 11:15:31,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:15:31,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956770196] [2022-12-14 11:15:31,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:15:31,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:15:31,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:15:31,984 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-14 11:15:31,984 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:15:31,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956770196] [2022-12-14 11:15:31,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956770196] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:15:31,984 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:15:31,985 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-14 11:15:31,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664285958] [2022-12-14 11:15:31,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:15:31,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 11:15:31,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:15:31,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 11:15:31,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-14 11:15:31,986 INFO L87 Difference]: Start difference. First operand 3672 states and 5865 transitions. Second operand has 7 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 3 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (17), 4 states have call predecessors, (17), 3 states have call successors, (17) [2022-12-14 11:15:33,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:15:33,098 INFO L93 Difference]: Finished difference Result 12852 states and 21435 transitions. [2022-12-14 11:15:33,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-14 11:15:33,099 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 3 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (17), 4 states have call predecessors, (17), 3 states have call successors, (17) Word has length 94 [2022-12-14 11:15:33,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:15:33,157 INFO L225 Difference]: With dead ends: 12852 [2022-12-14 11:15:33,157 INFO L226 Difference]: Without dead ends: 9192 [2022-12-14 11:15:33,175 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-12-14 11:15:33,176 INFO L413 NwaCegarLoop]: 950 mSDtfsCounter, 810 mSDsluCounter, 4131 mSDsCounter, 0 mSdLazyCounter, 818 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 881 SdHoareTripleChecker+Valid, 5081 SdHoareTripleChecker+Invalid, 924 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 818 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-14 11:15:33,176 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [881 Valid, 5081 Invalid, 924 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 818 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-14 11:15:33,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9192 states. [2022-12-14 11:15:33,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9192 to 7133. [2022-12-14 11:15:33,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7133 states, 4803 states have (on average 1.5084322298563397) internal successors, (7245), 5260 states have internal predecessors, (7245), 1950 states have call successors, (1950), 377 states have call predecessors, (1950), 379 states have return successors, (2420), 1738 states have call predecessors, (2420), 1942 states have call successors, (2420) [2022-12-14 11:15:33,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7133 states to 7133 states and 11615 transitions. [2022-12-14 11:15:33,748 INFO L78 Accepts]: Start accepts. Automaton has 7133 states and 11615 transitions. Word has length 94 [2022-12-14 11:15:33,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:15:33,748 INFO L495 AbstractCegarLoop]: Abstraction has 7133 states and 11615 transitions. [2022-12-14 11:15:33,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 3 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (17), 4 states have call predecessors, (17), 3 states have call successors, (17) [2022-12-14 11:15:33,749 INFO L276 IsEmpty]: Start isEmpty. Operand 7133 states and 11615 transitions. [2022-12-14 11:15:33,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-12-14 11:15:33,752 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:15:33,752 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:15:33,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-14 11:15:33,753 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:15:33,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:15:33,753 INFO L85 PathProgramCache]: Analyzing trace with hash -1894774354, now seen corresponding path program 1 times [2022-12-14 11:15:33,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:15:33,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860292226] [2022-12-14 11:15:33,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:15:33,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:15:33,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:15:33,956 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-14 11:15:33,956 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:15:33,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860292226] [2022-12-14 11:15:33,957 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860292226] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:15:33,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578099997] [2022-12-14 11:15:33,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:15:33,957 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:15:33,957 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b0a25a5-ced8-42b4-ac3f-92a03c866488/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:15:33,958 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b0a25a5-ced8-42b4-ac3f-92a03c866488/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:15:33,959 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b0a25a5-ced8-42b4-ac3f-92a03c866488/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 11:15:34,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:15:34,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 1620 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-14 11:15:34,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:15:34,385 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-14 11:15:34,385 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:15:34,385 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1578099997] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:15:34,385 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 11:15:34,385 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 12 [2022-12-14 11:15:34,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035522511] [2022-12-14 11:15:34,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:15:34,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 11:15:34,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:15:34,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 11:15:34,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2022-12-14 11:15:34,387 INFO L87 Difference]: Start difference. First operand 7133 states and 11615 transitions. Second operand has 7 states, 6 states have (on average 9.666666666666666) internal successors, (58), 5 states have internal predecessors, (58), 3 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2022-12-14 11:15:36,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:15:36,183 INFO L93 Difference]: Finished difference Result 17884 states and 29844 transitions. [2022-12-14 11:15:36,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 11:15:36,184 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 9.666666666666666) internal successors, (58), 5 states have internal predecessors, (58), 3 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) Word has length 100 [2022-12-14 11:15:36,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:15:36,227 INFO L225 Difference]: With dead ends: 17884 [2022-12-14 11:15:36,227 INFO L226 Difference]: Without dead ends: 10763 [2022-12-14 11:15:36,276 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2022-12-14 11:15:36,277 INFO L413 NwaCegarLoop]: 808 mSDtfsCounter, 1574 mSDsluCounter, 1619 mSDsCounter, 0 mSdLazyCounter, 2258 mSolverCounterSat, 249 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1631 SdHoareTripleChecker+Valid, 2427 SdHoareTripleChecker+Invalid, 2507 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 249 IncrementalHoareTripleChecker+Valid, 2258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-12-14 11:15:36,277 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1631 Valid, 2427 Invalid, 2507 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [249 Valid, 2258 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-12-14 11:15:36,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10763 states. [2022-12-14 11:15:36,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10763 to 7840. [2022-12-14 11:15:36,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7840 states, 5330 states have (on average 1.4891181988742965) internal successors, (7937), 5805 states have internal predecessors, (7937), 2082 states have call successors, (2082), 433 states have call predecessors, (2082), 427 states have return successors, (2567), 1844 states have call predecessors, (2567), 2074 states have call successors, (2567) [2022-12-14 11:15:36,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7840 states to 7840 states and 12586 transitions. [2022-12-14 11:15:36,711 INFO L78 Accepts]: Start accepts. Automaton has 7840 states and 12586 transitions. Word has length 100 [2022-12-14 11:15:36,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:15:36,711 INFO L495 AbstractCegarLoop]: Abstraction has 7840 states and 12586 transitions. [2022-12-14 11:15:36,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 9.666666666666666) internal successors, (58), 5 states have internal predecessors, (58), 3 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2022-12-14 11:15:36,712 INFO L276 IsEmpty]: Start isEmpty. Operand 7840 states and 12586 transitions. [2022-12-14 11:15:36,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-12-14 11:15:36,713 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:15:36,714 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:15:36,720 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b0a25a5-ced8-42b4-ac3f-92a03c866488/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-14 11:15:36,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b0a25a5-ced8-42b4-ac3f-92a03c866488/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:15:36,914 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:15:36,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:15:36,915 INFO L85 PathProgramCache]: Analyzing trace with hash 1681088988, now seen corresponding path program 1 times [2022-12-14 11:15:36,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:15:36,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115397729] [2022-12-14 11:15:36,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:15:36,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:15:36,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:15:37,120 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-12-14 11:15:37,120 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:15:37,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115397729] [2022-12-14 11:15:37,120 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115397729] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:15:37,120 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:15:37,120 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-14 11:15:37,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050377467] [2022-12-14 11:15:37,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:15:37,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 11:15:37,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:15:37,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 11:15:37,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-14 11:15:37,122 INFO L87 Difference]: Start difference. First operand 7840 states and 12586 transitions. Second operand has 7 states, 7 states have (on average 7.857142857142857) internal successors, (55), 6 states have internal predecessors, (55), 2 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 3 states have call predecessors, (19), 2 states have call successors, (19) [2022-12-14 11:15:37,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:15:37,893 INFO L93 Difference]: Finished difference Result 16759 states and 27478 transitions. [2022-12-14 11:15:37,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 11:15:37,894 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.857142857142857) internal successors, (55), 6 states have internal predecessors, (55), 2 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 3 states have call predecessors, (19), 2 states have call successors, (19) Word has length 105 [2022-12-14 11:15:37,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:15:37,933 INFO L225 Difference]: With dead ends: 16759 [2022-12-14 11:15:37,933 INFO L226 Difference]: Without dead ends: 10268 [2022-12-14 11:15:37,964 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 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 11:15:37,964 INFO L413 NwaCegarLoop]: 666 mSDtfsCounter, 205 mSDsluCounter, 3099 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 3765 SdHoareTripleChecker+Invalid, 320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 11:15:37,964 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [256 Valid, 3765 Invalid, 320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 229 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 11:15:37,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10268 states. [2022-12-14 11:15:38,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10268 to 7429. [2022-12-14 11:15:38,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7429 states, 5172 states have (on average 1.475831399845321) internal successors, (7633), 5534 states have internal predecessors, (7633), 1799 states have call successors, (1799), 433 states have call predecessors, (1799), 457 states have return successors, (2367), 1617 states have call predecessors, (2367), 1791 states have call successors, (2367) [2022-12-14 11:15:38,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7429 states to 7429 states and 11799 transitions. [2022-12-14 11:15:38,409 INFO L78 Accepts]: Start accepts. Automaton has 7429 states and 11799 transitions. Word has length 105 [2022-12-14 11:15:38,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:15:38,409 INFO L495 AbstractCegarLoop]: Abstraction has 7429 states and 11799 transitions. [2022-12-14 11:15:38,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.857142857142857) internal successors, (55), 6 states have internal predecessors, (55), 2 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 3 states have call predecessors, (19), 2 states have call successors, (19) [2022-12-14 11:15:38,410 INFO L276 IsEmpty]: Start isEmpty. Operand 7429 states and 11799 transitions. [2022-12-14 11:15:38,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-12-14 11:15:38,411 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:15:38,411 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:15:38,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-14 11:15:38,412 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:15:38,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:15:38,412 INFO L85 PathProgramCache]: Analyzing trace with hash 1293538899, now seen corresponding path program 1 times [2022-12-14 11:15:38,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:15:38,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314930049] [2022-12-14 11:15:38,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:15:38,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:15:38,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:15:38,779 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 11:15:38,779 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:15:38,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314930049] [2022-12-14 11:15:38,779 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314930049] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:15:38,779 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:15:38,779 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-12-14 11:15:38,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61279027] [2022-12-14 11:15:38,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:15:38,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-14 11:15:38,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:15:38,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-14 11:15:38,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-12-14 11:15:38,781 INFO L87 Difference]: Start difference. First operand 7429 states and 11799 transitions. Second operand has 12 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 states have internal predecessors, (57), 5 states have call successors, (22), 4 states have call predecessors, (22), 4 states have return successors, (20), 5 states have call predecessors, (20), 4 states have call successors, (20) [2022-12-14 11:15:42,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:15:42,143 INFO L93 Difference]: Finished difference Result 18626 states and 30682 transitions. [2022-12-14 11:15:42,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-12-14 11:15:42,144 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 states have internal predecessors, (57), 5 states have call successors, (22), 4 states have call predecessors, (22), 4 states have return successors, (20), 5 states have call predecessors, (20), 4 states have call successors, (20) Word has length 109 [2022-12-14 11:15:42,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:15:42,205 INFO L225 Difference]: With dead ends: 18626 [2022-12-14 11:15:42,205 INFO L226 Difference]: Without dead ends: 13273 [2022-12-14 11:15:42,228 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=161, Invalid=769, Unknown=0, NotChecked=0, Total=930 [2022-12-14 11:15:42,228 INFO L413 NwaCegarLoop]: 421 mSDtfsCounter, 1854 mSDsluCounter, 2522 mSDsCounter, 0 mSdLazyCounter, 5535 mSolverCounterSat, 825 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1957 SdHoareTripleChecker+Valid, 2943 SdHoareTripleChecker+Invalid, 6360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 825 IncrementalHoareTripleChecker+Valid, 5535 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-12-14 11:15:42,228 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1957 Valid, 2943 Invalid, 6360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [825 Valid, 5535 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-12-14 11:15:42,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13273 states. [2022-12-14 11:15:42,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13273 to 12586. [2022-12-14 11:15:42,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12586 states, 8843 states have (on average 1.483433224018998) internal successors, (13118), 9423 states have internal predecessors, (13118), 2936 states have call successors, (2936), 739 states have call predecessors, (2936), 806 states have return successors, (4213), 2669 states have call predecessors, (4213), 2924 states have call successors, (4213) [2022-12-14 11:15:42,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12586 states to 12586 states and 20267 transitions. [2022-12-14 11:15:42,938 INFO L78 Accepts]: Start accepts. Automaton has 12586 states and 20267 transitions. Word has length 109 [2022-12-14 11:15:42,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:15:42,938 INFO L495 AbstractCegarLoop]: Abstraction has 12586 states and 20267 transitions. [2022-12-14 11:15:42,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 states have internal predecessors, (57), 5 states have call successors, (22), 4 states have call predecessors, (22), 4 states have return successors, (20), 5 states have call predecessors, (20), 4 states have call successors, (20) [2022-12-14 11:15:42,939 INFO L276 IsEmpty]: Start isEmpty. Operand 12586 states and 20267 transitions. [2022-12-14 11:15:42,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-12-14 11:15:42,941 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:15:42,941 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 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] [2022-12-14 11:15:42,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-14 11:15:42,942 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:15:42,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:15:42,942 INFO L85 PathProgramCache]: Analyzing trace with hash 190008277, now seen corresponding path program 1 times [2022-12-14 11:15:42,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:15:42,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570869069] [2022-12-14 11:15:42,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:15:42,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:15:42,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:15:43,198 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2022-12-14 11:15:43,199 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:15:43,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570869069] [2022-12-14 11:15:43,199 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570869069] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:15:43,199 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:15:43,199 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-12-14 11:15:43,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394144197] [2022-12-14 11:15:43,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:15:43,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 11:15:43,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:15:43,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 11:15:43,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-12-14 11:15:43,200 INFO L87 Difference]: Start difference. First operand 12586 states and 20267 transitions. Second operand has 8 states, 6 states have (on average 10.333333333333334) internal successors, (62), 7 states have internal predecessors, (62), 4 states have call successors, (25), 3 states have call predecessors, (25), 4 states have return successors, (23), 4 states have call predecessors, (23), 4 states have call successors, (23) [2022-12-14 11:15:44,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:15:44,197 INFO L93 Difference]: Finished difference Result 18051 states and 29173 transitions. [2022-12-14 11:15:44,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-14 11:15:44,198 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 10.333333333333334) internal successors, (62), 7 states have internal predecessors, (62), 4 states have call successors, (25), 3 states have call predecessors, (25), 4 states have return successors, (23), 4 states have call predecessors, (23), 4 states have call successors, (23) Word has length 136 [2022-12-14 11:15:44,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:15:44,249 INFO L225 Difference]: With dead ends: 18051 [2022-12-14 11:15:44,249 INFO L226 Difference]: Without dead ends: 12671 [2022-12-14 11:15:44,276 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-12-14 11:15:44,276 INFO L413 NwaCegarLoop]: 731 mSDtfsCounter, 459 mSDsluCounter, 4051 mSDsCounter, 0 mSdLazyCounter, 544 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 462 SdHoareTripleChecker+Valid, 4782 SdHoareTripleChecker+Invalid, 553 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 544 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 11:15:44,276 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [462 Valid, 4782 Invalid, 553 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 544 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 11:15:44,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12671 states. [2022-12-14 11:15:45,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12671 to 11708. [2022-12-14 11:15:45,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11708 states, 8313 states have (on average 1.4887525562372188) internal successors, (12376), 8815 states have internal predecessors, (12376), 2588 states have call successors, (2588), 739 states have call predecessors, (2588), 806 states have return successors, (3382), 2399 states have call predecessors, (3382), 2576 states have call successors, (3382) [2022-12-14 11:15:45,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11708 states to 11708 states and 18346 transitions. [2022-12-14 11:15:45,095 INFO L78 Accepts]: Start accepts. Automaton has 11708 states and 18346 transitions. Word has length 136 [2022-12-14 11:15:45,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:15:45,095 INFO L495 AbstractCegarLoop]: Abstraction has 11708 states and 18346 transitions. [2022-12-14 11:15:45,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 10.333333333333334) internal successors, (62), 7 states have internal predecessors, (62), 4 states have call successors, (25), 3 states have call predecessors, (25), 4 states have return successors, (23), 4 states have call predecessors, (23), 4 states have call successors, (23) [2022-12-14 11:15:45,096 INFO L276 IsEmpty]: Start isEmpty. Operand 11708 states and 18346 transitions. [2022-12-14 11:15:45,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-12-14 11:15:45,098 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:15:45,098 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:15:45,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-12-14 11:15:45,098 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:15:45,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:15:45,098 INFO L85 PathProgramCache]: Analyzing trace with hash -1195966273, now seen corresponding path program 1 times [2022-12-14 11:15:45,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:15:45,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677288860] [2022-12-14 11:15:45,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:15:45,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:15:45,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:15:45,513 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2022-12-14 11:15:45,513 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:15:45,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677288860] [2022-12-14 11:15:45,514 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677288860] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:15:45,514 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:15:45,514 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-12-14 11:15:45,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722114132] [2022-12-14 11:15:45,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:15:45,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-14 11:15:45,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:15:45,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-14 11:15:45,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2022-12-14 11:15:45,515 INFO L87 Difference]: Start difference. First operand 11708 states and 18346 transitions. Second operand has 12 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 5 states have call successors, (26), 4 states have call predecessors, (26), 5 states have return successors, (24), 5 states have call predecessors, (24), 4 states have call successors, (24) [2022-12-14 11:15:50,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:15:50,789 INFO L93 Difference]: Finished difference Result 24631 states and 39866 transitions. [2022-12-14 11:15:50,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-12-14 11:15:50,789 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 5 states have call successors, (26), 4 states have call predecessors, (26), 5 states have return successors, (24), 5 states have call predecessors, (24), 4 states have call successors, (24) Word has length 140 [2022-12-14 11:15:50,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:15:50,870 INFO L225 Difference]: With dead ends: 24631 [2022-12-14 11:15:50,871 INFO L226 Difference]: Without dead ends: 24612 [2022-12-14 11:15:50,883 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 534 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=259, Invalid=1811, Unknown=0, NotChecked=0, Total=2070 [2022-12-14 11:15:50,883 INFO L413 NwaCegarLoop]: 533 mSDtfsCounter, 2882 mSDsluCounter, 3726 mSDsCounter, 0 mSdLazyCounter, 7920 mSolverCounterSat, 1265 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2986 SdHoareTripleChecker+Valid, 4259 SdHoareTripleChecker+Invalid, 9185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1265 IncrementalHoareTripleChecker+Valid, 7920 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-12-14 11:15:50,883 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2986 Valid, 4259 Invalid, 9185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1265 Valid, 7920 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2022-12-14 11:15:50,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24612 states. [2022-12-14 11:15:52,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24612 to 23106. [2022-12-14 11:15:52,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23106 states, 17084 states have (on average 1.5097752282837742) internal successors, (25793), 17813 states have internal predecessors, (25793), 4400 states have call successors, (4400), 1449 states have call predecessors, (4400), 1621 states have return successors, (6273), 4179 states have call predecessors, (6273), 4384 states have call successors, (6273) [2022-12-14 11:15:52,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23106 states to 23106 states and 36466 transitions. [2022-12-14 11:15:52,221 INFO L78 Accepts]: Start accepts. Automaton has 23106 states and 36466 transitions. Word has length 140 [2022-12-14 11:15:52,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:15:52,221 INFO L495 AbstractCegarLoop]: Abstraction has 23106 states and 36466 transitions. [2022-12-14 11:15:52,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 5 states have call successors, (26), 4 states have call predecessors, (26), 5 states have return successors, (24), 5 states have call predecessors, (24), 4 states have call successors, (24) [2022-12-14 11:15:52,221 INFO L276 IsEmpty]: Start isEmpty. Operand 23106 states and 36466 transitions. [2022-12-14 11:15:52,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2022-12-14 11:15:52,225 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:15:52,226 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:15:52,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-12-14 11:15:52,226 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:15:52,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:15:52,226 INFO L85 PathProgramCache]: Analyzing trace with hash -1344859131, now seen corresponding path program 1 times [2022-12-14 11:15:52,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:15:52,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712892287] [2022-12-14 11:15:52,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:15:52,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:15:52,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:15:52,426 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 20 proven. 2 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-12-14 11:15:52,426 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:15:52,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712892287] [2022-12-14 11:15:52,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712892287] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:15:52,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909141866] [2022-12-14 11:15:52,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:15:52,427 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:15:52,427 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b0a25a5-ced8-42b4-ac3f-92a03c866488/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:15:52,428 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b0a25a5-ced8-42b4-ac3f-92a03c866488/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:15:52,428 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b0a25a5-ced8-42b4-ac3f-92a03c866488/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 11:15:52,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:15:52,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 2002 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 11:15:52,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:15:52,731 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 72 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-12-14 11:15:52,731 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:15:52,731 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1909141866] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:15:52,731 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 11:15:52,731 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10] total 16 [2022-12-14 11:15:52,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916115217] [2022-12-14 11:15:52,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:15:52,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 11:15:52,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:15:52,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 11:15:52,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2022-12-14 11:15:52,732 INFO L87 Difference]: Start difference. First operand 23106 states and 36466 transitions. Second operand has 8 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 5 states have call successors, (29), 4 states have call predecessors, (29), 5 states have return successors, (27), 6 states have call predecessors, (27), 5 states have call successors, (27) [2022-12-14 11:15:56,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:15:56,357 INFO L93 Difference]: Finished difference Result 49242 states and 78707 transitions. [2022-12-14 11:15:56,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-12-14 11:15:56,358 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 5 states have call successors, (29), 4 states have call predecessors, (29), 5 states have return successors, (27), 6 states have call predecessors, (27), 5 states have call successors, (27) Word has length 159 [2022-12-14 11:15:56,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:15:56,464 INFO L225 Difference]: With dead ends: 49242 [2022-12-14 11:15:56,464 INFO L226 Difference]: Without dead ends: 25772 [2022-12-14 11:15:56,533 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=595, Unknown=0, NotChecked=0, Total=702 [2022-12-14 11:15:56,534 INFO L413 NwaCegarLoop]: 430 mSDtfsCounter, 1824 mSDsluCounter, 1296 mSDsCounter, 0 mSdLazyCounter, 3757 mSolverCounterSat, 1146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1860 SdHoareTripleChecker+Valid, 1726 SdHoareTripleChecker+Invalid, 4903 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1146 IncrementalHoareTripleChecker+Valid, 3757 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-12-14 11:15:56,534 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1860 Valid, 1726 Invalid, 4903 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1146 Valid, 3757 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-12-14 11:15:56,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25772 states. [2022-12-14 11:15:57,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25772 to 23091. [2022-12-14 11:15:57,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23091 states, 17069 states have (on average 1.510047454449587) internal successors, (25775), 17798 states have internal predecessors, (25775), 4400 states have call successors, (4400), 1449 states have call predecessors, (4400), 1621 states have return successors, (6273), 4179 states have call predecessors, (6273), 4384 states have call successors, (6273) [2022-12-14 11:15:58,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23091 states to 23091 states and 36448 transitions. [2022-12-14 11:15:58,071 INFO L78 Accepts]: Start accepts. Automaton has 23091 states and 36448 transitions. Word has length 159 [2022-12-14 11:15:58,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:15:58,071 INFO L495 AbstractCegarLoop]: Abstraction has 23091 states and 36448 transitions. [2022-12-14 11:15:58,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 5 states have call successors, (29), 4 states have call predecessors, (29), 5 states have return successors, (27), 6 states have call predecessors, (27), 5 states have call successors, (27) [2022-12-14 11:15:58,071 INFO L276 IsEmpty]: Start isEmpty. Operand 23091 states and 36448 transitions. [2022-12-14 11:15:58,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2022-12-14 11:15:58,075 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:15:58,075 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:15:58,082 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b0a25a5-ced8-42b4-ac3f-92a03c866488/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-12-14 11:15:58,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b0a25a5-ced8-42b4-ac3f-92a03c866488/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:15:58,277 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:15:58,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:15:58,278 INFO L85 PathProgramCache]: Analyzing trace with hash 1365191066, now seen corresponding path program 1 times [2022-12-14 11:15:58,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:15:58,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28545149] [2022-12-14 11:15:58,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:15:58,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:15:58,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:15:58,383 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2022-12-14 11:15:58,383 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:15:58,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28545149] [2022-12-14 11:15:58,383 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28545149] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:15:58,383 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:15:58,384 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 11:15:58,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514070659] [2022-12-14 11:15:58,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:15:58,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 11:15:58,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:15:58,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 11:15:58,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 11:15:58,385 INFO L87 Difference]: Start difference. First operand 23091 states and 36448 transitions. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 3 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) [2022-12-14 11:16:00,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:16:00,258 INFO L93 Difference]: Finished difference Result 54020 states and 86307 transitions. [2022-12-14 11:16:00,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 11:16:00,259 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 3 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) Word has length 172 [2022-12-14 11:16:00,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:16:00,361 INFO L225 Difference]: With dead ends: 54020 [2022-12-14 11:16:00,361 INFO L226 Difference]: Without dead ends: 30941 [2022-12-14 11:16:00,427 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 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 11:16:00,427 INFO L413 NwaCegarLoop]: 776 mSDtfsCounter, 520 mSDsluCounter, 576 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 520 SdHoareTripleChecker+Valid, 1352 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 11:16:00,427 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [520 Valid, 1352 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 11:16:00,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30941 states. [2022-12-14 11:16:02,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30941 to 30650. [2022-12-14 11:16:02,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30650 states, 22698 states have (on average 1.5100449378799894) internal successors, (34275), 23677 states have internal predecessors, (34275), 5795 states have call successors, (5795), 1913 states have call predecessors, (5795), 2156 states have return successors, (8329), 5509 states have call predecessors, (8329), 5779 states have call successors, (8329) [2022-12-14 11:16:02,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30650 states to 30650 states and 48399 transitions. [2022-12-14 11:16:02,428 INFO L78 Accepts]: Start accepts. Automaton has 30650 states and 48399 transitions. Word has length 172 [2022-12-14 11:16:02,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:16:02,429 INFO L495 AbstractCegarLoop]: Abstraction has 30650 states and 48399 transitions. [2022-12-14 11:16:02,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 3 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) [2022-12-14 11:16:02,429 INFO L276 IsEmpty]: Start isEmpty. Operand 30650 states and 48399 transitions. [2022-12-14 11:16:02,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2022-12-14 11:16:02,434 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:16:02,434 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:16:02,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-12-14 11:16:02,435 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:16:02,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:16:02,435 INFO L85 PathProgramCache]: Analyzing trace with hash 1611983308, now seen corresponding path program 1 times [2022-12-14 11:16:02,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:16:02,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462500164] [2022-12-14 11:16:02,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:16:02,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:16:02,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:16:02,715 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 21 proven. 2 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2022-12-14 11:16:02,716 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:16:02,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462500164] [2022-12-14 11:16:02,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462500164] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:16:02,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614197819] [2022-12-14 11:16:02,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:16:02,716 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:16:02,717 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b0a25a5-ced8-42b4-ac3f-92a03c866488/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:16:02,717 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b0a25a5-ced8-42b4-ac3f-92a03c866488/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:16:02,718 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b0a25a5-ced8-42b4-ac3f-92a03c866488/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 11:16:02,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:16:02,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 2060 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-14 11:16:02,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:16:03,038 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 76 proven. 1 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-12-14 11:16:03,038 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:16:03,248 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 21 proven. 1 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2022-12-14 11:16:03,248 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1614197819] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:16:03,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1028686971] [2022-12-14 11:16:03,265 INFO L159 IcfgInterpreter]: Started Sifa with 109 locations of interest [2022-12-14 11:16:03,265 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 11:16:03,267 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 11:16:03,271 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 11:16:03,272 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 11:16:09,126 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 677 for LOIs [2022-12-14 11:16:15,963 INFO L197 IcfgInterpreter]: Interpreting procedure __automaton_fail with input of size 29 for LOIs [2022-12-14 11:16:15,965 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection with input of size 42 for LOIs [2022-12-14 11:16:16,127 INFO L197 IcfgInterpreter]: Interpreting procedure isExecutiveFloorCalling with input of size 33 for LOIs [2022-12-14 11:16:16,148 INFO L197 IcfgInterpreter]: Interpreting procedure initTopDown with input of size 597 for LOIs [2022-12-14 11:16:18,254 INFO L197 IcfgInterpreter]: Interpreting procedure initFloors with input of size 571 for LOIs [2022-12-14 11:16:18,451 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 33 for LOIs [2022-12-14 11:16:18,453 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedAtCurrentFloor__wrappee__base with input of size 33 for LOIs [2022-12-14 11:16:18,538 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 57 for LOIs [2022-12-14 11:16:18,552 INFO L197 IcfgInterpreter]: Interpreting procedure buttonForFloorIsPressed with input of size 50 for LOIs [2022-12-14 11:16:18,563 INFO L197 IcfgInterpreter]: Interpreting procedure continueInDirection with input of size 43 for LOIs [2022-12-14 11:16:18,575 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentHeading with input of size 54 for LOIs [2022-12-14 11:16:18,583 INFO L197 IcfgInterpreter]: Interpreting procedure bobCall with input of size 571 for LOIs [2022-12-14 11:16:21,955 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 575 for LOIs [2022-12-14 11:16:22,545 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 503 for LOIs [2022-12-14 11:16:22,688 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 11:17:28,097 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '542235#(and (= ~executiveFloor~0 4) (= ~currentHeading~0 0) (= ~head~0.offset 0) (<= ~floorButtons_0~0 2147483647) (= ~expectedDirection~0 1) (= ~head~0.base 0) (= |#NULL.offset| 0) (<= 0 (+ ~floorButtons_0~0 2147483648)) (<= 0 |#StackHeapBarrier|) (= ~cleanupTimeShifts~0 12) (= |#NULL.base| 0))' at error location [2022-12-14 11:17:28,098 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 11:17:28,098 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 11:17:28,098 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 7] total 16 [2022-12-14 11:17:28,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042000588] [2022-12-14 11:17:28,098 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 11:17:28,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-14 11:17:28,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:17:28,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-14 11:17:28,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=9739, Unknown=0, NotChecked=0, Total=10302 [2022-12-14 11:17:28,101 INFO L87 Difference]: Start difference. First operand 30650 states and 48399 transitions. Second operand has 16 states, 13 states have (on average 9.692307692307692) internal successors, (126), 12 states have internal predecessors, (126), 6 states have call successors, (46), 4 states have call predecessors, (46), 8 states have return successors, (47), 10 states have call predecessors, (47), 6 states have call successors, (47) [2022-12-14 11:17:39,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:17:39,940 INFO L93 Difference]: Finished difference Result 114028 states and 189993 transitions. [2022-12-14 11:17:39,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-12-14 11:17:39,941 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 9.692307692307692) internal successors, (126), 12 states have internal predecessors, (126), 6 states have call successors, (46), 4 states have call predecessors, (46), 8 states have return successors, (47), 10 states have call predecessors, (47), 6 states have call successors, (47) Word has length 177 [2022-12-14 11:17:39,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:17:40,284 INFO L225 Difference]: With dead ends: 114028 [2022-12-14 11:17:40,284 INFO L226 Difference]: Without dead ends: 86592 [2022-12-14 11:17:40,550 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 604 GetRequests, 439 SyntacticMatches, 16 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8820 ImplicationChecksByTransitivity, 66.9s TimeCoverageRelationStatistics Valid=1094, Invalid=21556, Unknown=0, NotChecked=0, Total=22650 [2022-12-14 11:17:40,551 INFO L413 NwaCegarLoop]: 1372 mSDtfsCounter, 3474 mSDsluCounter, 10487 mSDsCounter, 0 mSdLazyCounter, 9488 mSolverCounterSat, 2172 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3537 SdHoareTripleChecker+Valid, 11859 SdHoareTripleChecker+Invalid, 11660 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2172 IncrementalHoareTripleChecker+Valid, 9488 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-12-14 11:17:40,551 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3537 Valid, 11859 Invalid, 11660 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2172 Valid, 9488 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2022-12-14 11:17:40,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86592 states. [2022-12-14 11:17:45,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86592 to 83927. [2022-12-14 11:17:45,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83927 states, 60163 states have (on average 1.4729817329587953) internal successors, (88619), 63163 states have internal predecessors, (88619), 17042 states have call successors, (17042), 6037 states have call predecessors, (17042), 6721 states have return successors, (28064), 16106 states have call predecessors, (28064), 16996 states have call successors, (28064) [2022-12-14 11:17:46,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83927 states to 83927 states and 133725 transitions. [2022-12-14 11:17:46,529 INFO L78 Accepts]: Start accepts. Automaton has 83927 states and 133725 transitions. Word has length 177 [2022-12-14 11:17:46,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:17:46,529 INFO L495 AbstractCegarLoop]: Abstraction has 83927 states and 133725 transitions. [2022-12-14 11:17:46,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 13 states have (on average 9.692307692307692) internal successors, (126), 12 states have internal predecessors, (126), 6 states have call successors, (46), 4 states have call predecessors, (46), 8 states have return successors, (47), 10 states have call predecessors, (47), 6 states have call successors, (47) [2022-12-14 11:17:46,530 INFO L276 IsEmpty]: Start isEmpty. Operand 83927 states and 133725 transitions. [2022-12-14 11:17:46,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2022-12-14 11:17:46,540 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:17:46,540 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:17:46,548 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b0a25a5-ced8-42b4-ac3f-92a03c866488/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-14 11:17:46,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b0a25a5-ced8-42b4-ac3f-92a03c866488/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-12-14 11:17:46,742 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:17:46,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:17:46,743 INFO L85 PathProgramCache]: Analyzing trace with hash 1309549383, now seen corresponding path program 1 times [2022-12-14 11:17:46,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:17:46,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191080443] [2022-12-14 11:17:46,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:17:46,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:17:46,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:17:46,855 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-12-14 11:17:46,855 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:17:46,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191080443] [2022-12-14 11:17:46,855 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191080443] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:17:46,855 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:17:46,855 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 11:17:46,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323178288] [2022-12-14 11:17:46,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:17:46,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 11:17:46,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:17:46,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 11:17:46,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 11:17:46,856 INFO L87 Difference]: Start difference. First operand 83927 states and 133725 transitions. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 2 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) [2022-12-14 11:17:54,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:17:54,655 INFO L93 Difference]: Finished difference Result 174253 states and 285809 transitions. [2022-12-14 11:17:54,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 11:17:54,656 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 2 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) Word has length 178 [2022-12-14 11:17:54,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:17:55,183 INFO L225 Difference]: With dead ends: 174253 [2022-12-14 11:17:55,183 INFO L226 Difference]: Without dead ends: 93546 [2022-12-14 11:17:55,504 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 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 11:17:55,504 INFO L413 NwaCegarLoop]: 784 mSDtfsCounter, 103 mSDsluCounter, 619 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 1403 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 11:17:55,505 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [163 Valid, 1403 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 11:17:55,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93546 states. [2022-12-14 11:18:01,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93546 to 84561. [2022-12-14 11:18:01,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84561 states, 60677 states have (on average 1.470754981294395) internal successors, (89241), 63679 states have internal predecessors, (89241), 17162 states have call successors, (17162), 6037 states have call predecessors, (17162), 6721 states have return successors, (28146), 16224 states have call predecessors, (28146), 17116 states have call successors, (28146) [2022-12-14 11:18:02,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84561 states to 84561 states and 134549 transitions. [2022-12-14 11:18:02,229 INFO L78 Accepts]: Start accepts. Automaton has 84561 states and 134549 transitions. Word has length 178 [2022-12-14 11:18:02,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:18:02,229 INFO L495 AbstractCegarLoop]: Abstraction has 84561 states and 134549 transitions. [2022-12-14 11:18:02,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 2 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) [2022-12-14 11:18:02,229 INFO L276 IsEmpty]: Start isEmpty. Operand 84561 states and 134549 transitions. [2022-12-14 11:18:02,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2022-12-14 11:18:02,242 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:18:02,242 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:18:02,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-12-14 11:18:02,242 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:18:02,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:18:02,243 INFO L85 PathProgramCache]: Analyzing trace with hash -538566677, now seen corresponding path program 1 times [2022-12-14 11:18:02,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:18:02,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126192408] [2022-12-14 11:18:02,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:18:02,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:18:02,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:18:02,428 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 19 proven. 1 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2022-12-14 11:18:02,429 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:18:02,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126192408] [2022-12-14 11:18:02,429 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126192408] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:18:02,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876033123] [2022-12-14 11:18:02,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:18:02,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:18:02,429 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b0a25a5-ced8-42b4-ac3f-92a03c866488/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:18:02,430 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b0a25a5-ced8-42b4-ac3f-92a03c866488/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:18:02,431 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b0a25a5-ced8-42b4-ac3f-92a03c866488/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-14 11:18:02,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:18:02,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 2056 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-14 11:18:02,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:18:02,667 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-12-14 11:18:02,667 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:18:02,667 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1876033123] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:18:02,667 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 11:18:02,667 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 8 [2022-12-14 11:18:02,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259220893] [2022-12-14 11:18:02,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:18:02,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 11:18:02,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:18:02,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 11:18:02,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-12-14 11:18:02,668 INFO L87 Difference]: Start difference. First operand 84561 states and 134549 transitions. Second operand has 8 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 3 states have call successors, (32), 3 states have call predecessors, (32), 5 states have return successors, (31), 4 states have call predecessors, (31), 3 states have call successors, (31) [2022-12-14 11:18:09,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:18:09,743 INFO L93 Difference]: Finished difference Result 164502 states and 261921 transitions. [2022-12-14 11:18:09,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-14 11:18:09,744 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 3 states have call successors, (32), 3 states have call predecessors, (32), 5 states have return successors, (31), 4 states have call predecessors, (31), 3 states have call successors, (31) Word has length 180 [2022-12-14 11:18:09,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:18:10,102 INFO L225 Difference]: With dead ends: 164502 [2022-12-14 11:18:10,102 INFO L226 Difference]: Without dead ends: 83290 [2022-12-14 11:18:10,456 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-12-14 11:18:10,456 INFO L413 NwaCegarLoop]: 1044 mSDtfsCounter, 599 mSDsluCounter, 4427 mSDsCounter, 0 mSdLazyCounter, 1853 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 657 SdHoareTripleChecker+Valid, 5471 SdHoareTripleChecker+Invalid, 1984 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 1853 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-12-14 11:18:10,456 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [657 Valid, 5471 Invalid, 1984 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 1853 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-12-14 11:18:10,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83290 states. [2022-12-14 11:18:15,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83290 to 83086. [2022-12-14 11:18:15,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83086 states, 60500 states have (on average 1.4685785123966941) internal successors, (88849), 63059 states have internal predecessors, (88849), 15871 states have call successors, (15871), 6051 states have call predecessors, (15871), 6714 states have return successors, (26235), 15145 states have call predecessors, (26235), 15819 states have call successors, (26235) [2022-12-14 11:18:16,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83086 states to 83086 states and 130955 transitions. [2022-12-14 11:18:16,103 INFO L78 Accepts]: Start accepts. Automaton has 83086 states and 130955 transitions. Word has length 180 [2022-12-14 11:18:16,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:18:16,104 INFO L495 AbstractCegarLoop]: Abstraction has 83086 states and 130955 transitions. [2022-12-14 11:18:16,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 3 states have call successors, (32), 3 states have call predecessors, (32), 5 states have return successors, (31), 4 states have call predecessors, (31), 3 states have call successors, (31) [2022-12-14 11:18:16,104 INFO L276 IsEmpty]: Start isEmpty. Operand 83086 states and 130955 transitions. [2022-12-14 11:18:16,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2022-12-14 11:18:16,115 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:18:16,115 INFO L195 NwaCegarLoop]: trace histogram [7, 5, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:18:16,122 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b0a25a5-ced8-42b4-ac3f-92a03c866488/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-14 11:18:16,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b0a25a5-ced8-42b4-ac3f-92a03c866488/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-12-14 11:18:16,317 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:18:16,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:18:16,318 INFO L85 PathProgramCache]: Analyzing trace with hash 2129251795, now seen corresponding path program 1 times [2022-12-14 11:18:16,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:18:16,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307697922] [2022-12-14 11:18:16,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:18:16,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:18:16,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:18:16,430 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2022-12-14 11:18:16,431 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:18:16,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307697922] [2022-12-14 11:18:16,431 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307697922] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:18:16,431 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:18:16,431 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 11:18:16,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742960069] [2022-12-14 11:18:16,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:18:16,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 11:18:16,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:18:16,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 11:18:16,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 11:18:16,432 INFO L87 Difference]: Start difference. First operand 83086 states and 130955 transitions. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 2 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) [2022-12-14 11:18:23,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:18:23,266 INFO L93 Difference]: Finished difference Result 170319 states and 275893 transitions. [2022-12-14 11:18:23,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 11:18:23,267 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 2 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) Word has length 185 [2022-12-14 11:18:23,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:18:23,702 INFO L225 Difference]: With dead ends: 170319 [2022-12-14 11:18:23,702 INFO L226 Difference]: Without dead ends: 90517 [2022-12-14 11:18:24,124 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 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 11:18:24,125 INFO L413 NwaCegarLoop]: 774 mSDtfsCounter, 102 mSDsluCounter, 611 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 1385 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 11:18:24,125 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [162 Valid, 1385 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 11:18:24,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90517 states. [2022-12-14 11:18:29,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90517 to 83110. [2022-12-14 11:18:29,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83110 states, 60524 states have (on average 1.468392703720838) internal successors, (88873), 63083 states have internal predecessors, (88873), 15871 states have call successors, (15871), 6051 states have call predecessors, (15871), 6714 states have return successors, (26235), 15145 states have call predecessors, (26235), 15819 states have call successors, (26235) [2022-12-14 11:18:29,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83110 states to 83110 states and 130979 transitions. [2022-12-14 11:18:29,879 INFO L78 Accepts]: Start accepts. Automaton has 83110 states and 130979 transitions. Word has length 185 [2022-12-14 11:18:29,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:18:29,880 INFO L495 AbstractCegarLoop]: Abstraction has 83110 states and 130979 transitions. [2022-12-14 11:18:29,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 2 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) [2022-12-14 11:18:29,880 INFO L276 IsEmpty]: Start isEmpty. Operand 83110 states and 130979 transitions. [2022-12-14 11:18:29,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2022-12-14 11:18:29,893 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:18:29,894 INFO L195 NwaCegarLoop]: trace histogram [8, 5, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:18:29,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-12-14 11:18:29,894 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:18:29,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:18:29,894 INFO L85 PathProgramCache]: Analyzing trace with hash -717895138, now seen corresponding path program 1 times [2022-12-14 11:18:29,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:18:29,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90264187] [2022-12-14 11:18:29,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:18:29,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:18:29,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:18:30,169 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 32 proven. 1 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2022-12-14 11:18:30,169 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:18:30,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90264187] [2022-12-14 11:18:30,169 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90264187] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:18:30,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011637646] [2022-12-14 11:18:30,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:18:30,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:18:30,169 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b0a25a5-ced8-42b4-ac3f-92a03c866488/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:18:30,170 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b0a25a5-ced8-42b4-ac3f-92a03c866488/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:18:30,171 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b0a25a5-ced8-42b4-ac3f-92a03c866488/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-14 11:18:30,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:18:30,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 2091 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-14 11:18:30,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:18:30,535 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 91 proven. 1 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-12-14 11:18:30,535 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:18:30,733 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 32 proven. 1 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2022-12-14 11:18:30,733 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2011637646] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:18:30,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1189277399] [2022-12-14 11:18:30,737 INFO L159 IcfgInterpreter]: Started Sifa with 107 locations of interest [2022-12-14 11:18:30,737 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 11:18:30,737 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 11:18:30,737 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 11:18:30,738 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 11:18:37,167 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 675 for LOIs [2022-12-14 11:18:44,609 INFO L197 IcfgInterpreter]: Interpreting procedure __automaton_fail with input of size 38 for LOIs [2022-12-14 11:18:44,611 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection with input of size 48 for LOIs [2022-12-14 11:18:44,798 INFO L197 IcfgInterpreter]: Interpreting procedure isExecutiveFloorCalling with input of size 56 for LOIs [2022-12-14 11:18:44,847 INFO L197 IcfgInterpreter]: Interpreting procedure initTopDown with input of size 597 for LOIs [2022-12-14 11:18:46,898 INFO L197 IcfgInterpreter]: Interpreting procedure initFloors with input of size 571 for LOIs [2022-12-14 11:18:47,100 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 55 for LOIs [2022-12-14 11:18:47,105 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedAtCurrentFloor__wrappee__base with input of size 39 for LOIs [2022-12-14 11:18:47,199 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 39 for LOIs [2022-12-14 11:18:47,207 INFO L197 IcfgInterpreter]: Interpreting procedure buttonForFloorIsPressed with input of size 55 for LOIs [2022-12-14 11:18:47,219 INFO L197 IcfgInterpreter]: Interpreting procedure continueInDirection with input of size 49 for LOIs [2022-12-14 11:18:47,231 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentHeading with input of size 39 for LOIs [2022-12-14 11:18:47,233 INFO L197 IcfgInterpreter]: Interpreting procedure bobCall with input of size 571 for LOIs [2022-12-14 11:18:51,044 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 575 for LOIs [2022-12-14 11:18:51,617 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 503 for LOIs [2022-12-14 11:18:51,759 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 11:19:53,168 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1911549#(and (= ~executiveFloor~0 4) (<= ~floorButtons_2~0 2147483647) (<= ~floorButtons_0~0 0) (<= 0 ~floorButtons_1~0) (= ~head~0.offset 0) (= ~currentHeading~0 1) (<= 0 (+ ~floorButtons_2~0 2147483648)) (<= 0 ~floorButtons_0~0) (= ~head~0.base 0) (= |#NULL.offset| 0) (= 0 (+ ~expectedDirection~0 1)) (<= 0 |#StackHeapBarrier|) (<= ~floorButtons_1~0 0) (= ~cleanupTimeShifts~0 12) (= ~currentFloorID~0 1) (= |#NULL.base| 0))' at error location [2022-12-14 11:19:53,168 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 11:19:53,169 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 11:19:53,169 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 16 [2022-12-14 11:19:53,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688030807] [2022-12-14 11:19:53,169 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 11:19:53,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-14 11:19:53,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:19:53,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-14 11:19:53,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=602, Invalid=8328, Unknown=0, NotChecked=0, Total=8930 [2022-12-14 11:19:53,171 INFO L87 Difference]: Start difference. First operand 83110 states and 130979 transitions. Second operand has 16 states, 13 states have (on average 11.538461538461538) internal successors, (150), 13 states have internal predecessors, (150), 8 states have call successors, (50), 3 states have call predecessors, (50), 8 states have return successors, (51), 11 states have call predecessors, (51), 8 states have call successors, (51) [2022-12-14 11:20:05,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:20:05,948 INFO L93 Difference]: Finished difference Result 164491 states and 270499 transitions. [2022-12-14 11:20:05,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-12-14 11:20:05,949 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 11.538461538461538) internal successors, (150), 13 states have internal predecessors, (150), 8 states have call successors, (50), 3 states have call predecessors, (50), 8 states have return successors, (51), 11 states have call predecessors, (51), 8 states have call successors, (51) Word has length 190 [2022-12-14 11:20:05,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:20:06,451 INFO L225 Difference]: With dead ends: 164491 [2022-12-14 11:20:06,452 INFO L226 Difference]: Without dead ends: 112506 [2022-12-14 11:20:06,809 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 608 GetRequests, 474 SyntacticMatches, 20 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6049 ImplicationChecksByTransitivity, 61.8s TimeCoverageRelationStatistics Valid=838, Invalid=12502, Unknown=0, NotChecked=0, Total=13340 [2022-12-14 11:20:06,810 INFO L413 NwaCegarLoop]: 1481 mSDtfsCounter, 3873 mSDsluCounter, 6578 mSDsCounter, 0 mSdLazyCounter, 7503 mSolverCounterSat, 1550 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3940 SdHoareTripleChecker+Valid, 8059 SdHoareTripleChecker+Invalid, 9053 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1550 IncrementalHoareTripleChecker+Valid, 7503 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-12-14 11:20:06,810 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3940 Valid, 8059 Invalid, 9053 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1550 Valid, 7503 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2022-12-14 11:20:06,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112506 states. [2022-12-14 11:20:14,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112506 to 110282. [2022-12-14 11:20:14,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110282 states, 77468 states have (on average 1.4162880156968038) internal successors, (109717), 81595 states have internal predecessors, (109717), 23614 states have call successors, (23614), 8526 states have call predecessors, (23614), 9199 states have return successors, (38788), 22308 states have call predecessors, (38788), 23509 states have call successors, (38788) [2022-12-14 11:20:15,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110282 states to 110282 states and 172119 transitions. [2022-12-14 11:20:15,373 INFO L78 Accepts]: Start accepts. Automaton has 110282 states and 172119 transitions. Word has length 190 [2022-12-14 11:20:15,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:20:15,374 INFO L495 AbstractCegarLoop]: Abstraction has 110282 states and 172119 transitions. [2022-12-14 11:20:15,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 13 states have (on average 11.538461538461538) internal successors, (150), 13 states have internal predecessors, (150), 8 states have call successors, (50), 3 states have call predecessors, (50), 8 states have return successors, (51), 11 states have call predecessors, (51), 8 states have call successors, (51) [2022-12-14 11:20:15,374 INFO L276 IsEmpty]: Start isEmpty. Operand 110282 states and 172119 transitions. [2022-12-14 11:20:15,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2022-12-14 11:20:15,385 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:20:15,386 INFO L195 NwaCegarLoop]: trace histogram [7, 5, 5, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-12-14 11:20:15,393 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b0a25a5-ced8-42b4-ac3f-92a03c866488/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-12-14 11:20:15,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b0a25a5-ced8-42b4-ac3f-92a03c866488/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:20:15,587 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:20:15,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:20:15,589 INFO L85 PathProgramCache]: Analyzing trace with hash -1644899701, now seen corresponding path program 1 times [2022-12-14 11:20:15,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:20:15,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560830287] [2022-12-14 11:20:15,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:20:15,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:20:15,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:20:16,670 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2022-12-14 11:20:16,670 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:20:16,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560830287] [2022-12-14 11:20:16,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560830287] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:20:16,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731219603] [2022-12-14 11:20:16,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:20:16,671 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:20:16,671 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b0a25a5-ced8-42b4-ac3f-92a03c866488/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:20:16,671 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b0a25a5-ced8-42b4-ac3f-92a03c866488/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:20:16,672 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b0a25a5-ced8-42b4-ac3f-92a03c866488/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-14 11:20:16,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:20:16,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 2085 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-14 11:20:16,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:20:17,076 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 101 proven. 2 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-12-14 11:20:17,076 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:20:17,399 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 40 proven. 2 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2022-12-14 11:20:17,399 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1731219603] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:20:17,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1869515840] [2022-12-14 11:20:17,402 INFO L159 IcfgInterpreter]: Started Sifa with 99 locations of interest [2022-12-14 11:20:17,402 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 11:20:17,402 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 11:20:17,403 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 11:20:17,403 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 11:20:22,992 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 678 for LOIs [2022-12-14 11:22:06,280 INFO L197 IcfgInterpreter]: Interpreting procedure __automaton_fail with input of size 36 for LOIs [2022-12-14 11:22:06,282 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection with input of size 52 for LOIs [2022-12-14 11:22:06,439 INFO L197 IcfgInterpreter]: Interpreting procedure isExecutiveFloorCalling with input of size 451 for LOIs [2022-12-14 11:22:07,647 INFO L197 IcfgInterpreter]: Interpreting procedure initTopDown with input of size 597 for LOIs [2022-12-14 11:22:09,692 INFO L197 IcfgInterpreter]: Interpreting procedure initFloors with input of size 571 for LOIs [2022-12-14 11:22:09,887 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 83 for LOIs [2022-12-14 11:22:09,895 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedAtCurrentFloor__wrappee__base with input of size 425 for LOIs [2022-12-14 11:22:10,526 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 63 for LOIs [2022-12-14 11:22:10,540 INFO L197 IcfgInterpreter]: Interpreting procedure buttonForFloorIsPressed with input of size 62 for LOIs [2022-12-14 11:22:10,553 INFO L197 IcfgInterpreter]: Interpreting procedure continueInDirection with input of size 62 for LOIs [2022-12-14 11:22:10,567 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentHeading with input of size 55 for LOIs [2022-12-14 11:22:10,571 INFO L197 IcfgInterpreter]: Interpreting procedure bobCall with input of size 571 for LOIs [2022-12-14 11:22:13,865 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 575 for LOIs [2022-12-14 11:22:14,434 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 503 for LOIs [2022-12-14 11:22:14,576 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 11:23:00,079 WARN L233 SmtUtils]: Spent 7.94s on a formula simplification. DAG size of input: 625 DAG size of output: 598 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 11:23:09,403 WARN L233 SmtUtils]: Spent 8.58s on a formula simplification. DAG size of input: 644 DAG size of output: 605 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 11:23:18,093 WARN L233 SmtUtils]: Spent 8.29s on a formula simplification. DAG size of input: 649 DAG size of output: 603 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 11:23:28,212 WARN L233 SmtUtils]: Spent 9.39s on a formula simplification. DAG size of input: 663 DAG size of output: 615 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 11:23:37,471 WARN L233 SmtUtils]: Spent 8.81s on a formula simplification. DAG size of input: 663 DAG size of output: 605 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 11:23:47,096 WARN L233 SmtUtils]: Spent 8.71s on a formula simplification. DAG size of input: 664 DAG size of output: 604 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 11:23:57,742 WARN L233 SmtUtils]: Spent 9.52s on a formula simplification. DAG size of input: 672 DAG size of output: 610 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 11:24:08,489 WARN L233 SmtUtils]: Spent 10.24s on a formula simplification. DAG size of input: 666 DAG size of output: 615 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 11:24:18,401 WARN L233 SmtUtils]: Spent 8.79s on a formula simplification. DAG size of input: 664 DAG size of output: 607 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 11:24:28,843 WARN L233 SmtUtils]: Spent 9.86s on a formula simplification. DAG size of input: 674 DAG size of output: 612 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 11:24:37,457 WARN L233 SmtUtils]: Spent 8.04s on a formula simplification. DAG size of input: 671 DAG size of output: 609 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 11:24:46,483 WARN L233 SmtUtils]: Spent 7.81s on a formula simplification. DAG size of input: 669 DAG size of output: 610 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 11:24:56,636 WARN L233 SmtUtils]: Spent 9.52s on a formula simplification. DAG size of input: 680 DAG size of output: 617 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 11:25:06,289 WARN L233 SmtUtils]: Spent 9.03s on a formula simplification. DAG size of input: 677 DAG size of output: 617 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 11:25:24,567 WARN L233 SmtUtils]: Spent 5.10s on a formula simplification. DAG size of input: 684 DAG size of output: 592 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 11:26:06,607 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2304739#(and (= ~executiveFloor~0 4) (<= ~floorButtons_2~0 2147483647) (<= ~floorButtons_0~0 0) (<= 0 ~floorButtons_1~0) (= ~head~0.offset 0) (= ~currentHeading~0 1) (<= 0 (+ ~floorButtons_2~0 2147483648)) (<= 0 ~floorButtons_0~0) (= ~head~0.base 0) (= |#NULL.offset| 0) (= 0 (+ ~expectedDirection~0 1)) (<= 0 |#StackHeapBarrier|) (<= ~floorButtons_1~0 0) (= ~cleanupTimeShifts~0 12) (= |#NULL.base| 0))' at error location [2022-12-14 11:26:06,608 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 11:26:06,608 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 11:26:06,608 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 12, 12] total 35 [2022-12-14 11:26:06,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304886339] [2022-12-14 11:26:06,608 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 11:26:06,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-12-14 11:26:06,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:26:06,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-12-14 11:26:06,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1307, Invalid=10683, Unknown=0, NotChecked=0, Total=11990 [2022-12-14 11:26:06,610 INFO L87 Difference]: Start difference. First operand 110282 states and 172119 transitions. Second operand has 35 states, 29 states have (on average 6.344827586206897) internal successors, (184), 29 states have internal predecessors, (184), 12 states have call successors, (67), 10 states have call predecessors, (67), 12 states have return successors, (68), 15 states have call predecessors, (68), 11 states have call successors, (68) [2022-12-14 11:26:43,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:26:43,136 INFO L93 Difference]: Finished difference Result 291688 states and 490979 transitions. [2022-12-14 11:26:43,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 139 states. [2022-12-14 11:26:43,137 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 29 states have (on average 6.344827586206897) internal successors, (184), 29 states have internal predecessors, (184), 12 states have call successors, (67), 10 states have call predecessors, (67), 12 states have return successors, (68), 15 states have call predecessors, (68), 11 states have call successors, (68) Word has length 189 [2022-12-14 11:26:43,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:26:44,509 INFO L225 Difference]: With dead ends: 291688 [2022-12-14 11:26:44,510 INFO L226 Difference]: Without dead ends: 181042 [2022-12-14 11:26:45,460 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 762 GetRequests, 506 SyntacticMatches, 22 SemanticMatches, 234 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25243 ImplicationChecksByTransitivity, 235.8s TimeCoverageRelationStatistics Valid=5363, Invalid=50097, Unknown=0, NotChecked=0, Total=55460 [2022-12-14 11:26:45,460 INFO L413 NwaCegarLoop]: 680 mSDtfsCounter, 15598 mSDsluCounter, 7633 mSDsCounter, 0 mSdLazyCounter, 27710 mSolverCounterSat, 10377 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15645 SdHoareTripleChecker+Valid, 8313 SdHoareTripleChecker+Invalid, 38087 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 10377 IncrementalHoareTripleChecker+Valid, 27710 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.1s IncrementalHoareTripleChecker+Time [2022-12-14 11:26:45,460 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15645 Valid, 8313 Invalid, 38087 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [10377 Valid, 27710 Invalid, 0 Unknown, 0 Unchecked, 15.1s Time] [2022-12-14 11:26:45,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181042 states. [2022-12-14 11:27:00,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181042 to 164708. [2022-12-14 11:27:00,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164708 states, 114801 states have (on average 1.412113134903006) internal successors, (162112), 121193 states have internal predecessors, (162112), 35858 states have call successors, (35858), 12984 states have call predecessors, (35858), 14048 states have return successors, (64007), 33926 states have call predecessors, (64007), 35692 states have call successors, (64007) [2022-12-14 11:27:02,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164708 states to 164708 states and 261977 transitions. [2022-12-14 11:27:02,397 INFO L78 Accepts]: Start accepts. Automaton has 164708 states and 261977 transitions. Word has length 189 [2022-12-14 11:27:02,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:27:02,397 INFO L495 AbstractCegarLoop]: Abstraction has 164708 states and 261977 transitions. [2022-12-14 11:27:02,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 29 states have (on average 6.344827586206897) internal successors, (184), 29 states have internal predecessors, (184), 12 states have call successors, (67), 10 states have call predecessors, (67), 12 states have return successors, (68), 15 states have call predecessors, (68), 11 states have call successors, (68) [2022-12-14 11:27:02,397 INFO L276 IsEmpty]: Start isEmpty. Operand 164708 states and 261977 transitions. [2022-12-14 11:27:02,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2022-12-14 11:27:02,413 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:27:02,413 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:27:02,420 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b0a25a5-ced8-42b4-ac3f-92a03c866488/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-12-14 11:27:02,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b0a25a5-ced8-42b4-ac3f-92a03c866488/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:27:02,615 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:27:02,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:27:02,616 INFO L85 PathProgramCache]: Analyzing trace with hash 1765441935, now seen corresponding path program 1 times [2022-12-14 11:27:02,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:27:02,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927012429] [2022-12-14 11:27:02,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:27:02,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:27:02,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:27:03,185 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 13 proven. 11 refuted. 0 times theorem prover too weak. 160 trivial. 0 not checked. [2022-12-14 11:27:03,185 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:27:03,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927012429] [2022-12-14 11:27:03,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927012429] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:27:03,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367691149] [2022-12-14 11:27:03,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:27:03,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:27:03,185 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b0a25a5-ced8-42b4-ac3f-92a03c866488/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:27:03,186 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b0a25a5-ced8-42b4-ac3f-92a03c866488/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:27:03,187 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b0a25a5-ced8-42b4-ac3f-92a03c866488/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-14 11:27:03,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:27:03,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 2152 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-14 11:27:03,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:27:03,546 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 112 proven. 6 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-12-14 11:27:03,547 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:27:03,996 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 13 proven. 11 refuted. 0 times theorem prover too weak. 160 trivial. 0 not checked. [2022-12-14 11:27:03,996 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1367691149] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:27:03,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [603123093] [2022-12-14 11:27:04,000 INFO L159 IcfgInterpreter]: Started Sifa with 118 locations of interest [2022-12-14 11:27:04,000 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 11:27:04,000 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 11:27:04,001 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 11:27:04,001 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 11:27:09,862 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 673 for LOIs [2022-12-14 11:27:19,420 INFO L197 IcfgInterpreter]: Interpreting procedure __automaton_fail with input of size 29 for LOIs [2022-12-14 11:27:19,422 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection with input of size 72 for LOIs [2022-12-14 11:27:19,725 INFO L197 IcfgInterpreter]: Interpreting procedure isExecutiveFloorCalling with input of size 32 for LOIs [2022-12-14 11:27:19,744 INFO L197 IcfgInterpreter]: Interpreting procedure initTopDown with input of size 597 for LOIs [2022-12-14 11:27:21,833 INFO L197 IcfgInterpreter]: Interpreting procedure initFloors with input of size 571 for LOIs [2022-12-14 11:27:22,031 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 48 for LOIs [2022-12-14 11:27:22,035 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedAtCurrentFloor__wrappee__base with input of size 49 for LOIs [2022-12-14 11:27:22,132 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 48 for LOIs [2022-12-14 11:27:22,143 INFO L197 IcfgInterpreter]: Interpreting procedure buttonForFloorIsPressed with input of size 58 for LOIs [2022-12-14 11:27:22,156 INFO L197 IcfgInterpreter]: Interpreting procedure continueInDirection with input of size 84 for LOIs [2022-12-14 11:27:22,264 INFO L197 IcfgInterpreter]: Interpreting procedure getReverseHeading with input of size 79 for LOIs [2022-12-14 11:27:22,284 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentHeading with input of size 54 for LOIs [2022-12-14 11:27:22,292 INFO L197 IcfgInterpreter]: Interpreting procedure bobCall with input of size 571 for LOIs [2022-12-14 11:27:26,259 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 575 for LOIs [2022-12-14 11:27:26,821 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 503 for LOIs [2022-12-14 11:27:26,969 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 11:28:05,835 WARN L233 SmtUtils]: Spent 5.20s on a formula simplification. DAG size of input: 673 DAG size of output: 571 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)