./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec3_product17.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c986a09d-f159-4289-95a9-f0114d2f8c45/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c986a09d-f159-4289-95a9-f0114d2f8c45/bin/utaipan-I9t0OCRTmS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c986a09d-f159-4289-95a9-f0114d2f8c45/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c986a09d-f159-4289-95a9-f0114d2f8c45/bin/utaipan-I9t0OCRTmS/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec3_product17.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c986a09d-f159-4289-95a9-f0114d2f8c45/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c986a09d-f159-4289-95a9-f0114d2f8c45/bin/utaipan-I9t0OCRTmS --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 c169527384ebd2beb44494ef6b1cbc32334198d2b76d2236e6ced79c84ed026c --- 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-8393723 [2022-11-19 07:32:30,302 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 07:32:30,304 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 07:32:30,331 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 07:32:30,331 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 07:32:30,332 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 07:32:30,334 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 07:32:30,336 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 07:32:30,338 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 07:32:30,339 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 07:32:30,340 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 07:32:30,341 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 07:32:30,341 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 07:32:30,342 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 07:32:30,343 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 07:32:30,345 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 07:32:30,348 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 07:32:30,349 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 07:32:30,351 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 07:32:30,353 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 07:32:30,354 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 07:32:30,356 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 07:32:30,357 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 07:32:30,358 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 07:32:30,361 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 07:32:30,362 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 07:32:30,362 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 07:32:30,363 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 07:32:30,363 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 07:32:30,364 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 07:32:30,365 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 07:32:30,366 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 07:32:30,366 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 07:32:30,367 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 07:32:30,368 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 07:32:30,368 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 07:32:30,369 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 07:32:30,370 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 07:32:30,370 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 07:32:30,371 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 07:32:30,372 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 07:32:30,372 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c986a09d-f159-4289-95a9-f0114d2f8c45/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-19 07:32:30,398 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 07:32:30,399 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 07:32:30,399 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 07:32:30,399 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 07:32:30,400 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 07:32:30,400 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 07:32:30,400 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 07:32:30,401 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 07:32:30,401 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 07:32:30,401 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 07:32:30,401 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 07:32:30,402 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 07:32:30,402 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 07:32:30,402 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 07:32:30,402 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 07:32:30,402 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 07:32:30,403 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 07:32:30,403 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 07:32:30,403 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 07:32:30,404 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-19 07:32:30,404 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 07:32:30,404 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-19 07:32:30,404 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 07:32:30,404 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-19 07:32:30,404 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 07:32:30,405 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-19 07:32:30,405 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-19 07:32:30,405 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-19 07:32:30,405 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 07:32:30,405 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-19 07:32:30,406 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 07:32:30,406 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 07:32:30,406 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:32:30,406 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 07:32:30,406 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 07:32:30,407 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 07:32:30,407 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-19 07:32:30,407 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 07:32:30,407 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 07:32:30,407 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-19 07:32:30,407 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 07:32:30,408 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_c986a09d-f159-4289-95a9-f0114d2f8c45/bin/utaipan-I9t0OCRTmS/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c986a09d-f159-4289-95a9-f0114d2f8c45/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c169527384ebd2beb44494ef6b1cbc32334198d2b76d2236e6ced79c84ed026c [2022-11-19 07:32:30,691 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 07:32:30,712 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 07:32:30,715 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 07:32:30,716 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 07:32:30,717 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 07:32:30,718 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c986a09d-f159-4289-95a9-f0114d2f8c45/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/product-lines/elevator_spec3_product17.cil.c [2022-11-19 07:32:30,789 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c986a09d-f159-4289-95a9-f0114d2f8c45/bin/utaipan-I9t0OCRTmS/data/d2ca45dc8/aaa4f1ac02d04820855ff0409c310fe6/FLAG32944982c [2022-11-19 07:32:31,404 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 07:32:31,405 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c986a09d-f159-4289-95a9-f0114d2f8c45/sv-benchmarks/c/product-lines/elevator_spec3_product17.cil.c [2022-11-19 07:32:31,436 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c986a09d-f159-4289-95a9-f0114d2f8c45/bin/utaipan-I9t0OCRTmS/data/d2ca45dc8/aaa4f1ac02d04820855ff0409c310fe6/FLAG32944982c [2022-11-19 07:32:31,673 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c986a09d-f159-4289-95a9-f0114d2f8c45/bin/utaipan-I9t0OCRTmS/data/d2ca45dc8/aaa4f1ac02d04820855ff0409c310fe6 [2022-11-19 07:32:31,676 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 07:32:31,678 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 07:32:31,680 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 07:32:31,681 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 07:32:31,684 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 07:32:31,685 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:32:31" (1/1) ... [2022-11-19 07:32:31,686 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@79ac26b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:32:31, skipping insertion in model container [2022-11-19 07:32:31,686 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:32:31" (1/1) ... [2022-11-19 07:32:31,693 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 07:32:31,767 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 07:32:32,025 WARN L234 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_c986a09d-f159-4289-95a9-f0114d2f8c45/sv-benchmarks/c/product-lines/elevator_spec3_product17.cil.c[5770,5783] [2022-11-19 07:32:32,329 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:32:32,345 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 07:32:32,379 WARN L234 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_c986a09d-f159-4289-95a9-f0114d2f8c45/sv-benchmarks/c/product-lines/elevator_spec3_product17.cil.c[5770,5783] [2022-11-19 07:32:32,522 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:32:32,549 INFO L208 MainTranslator]: Completed translation [2022-11-19 07:32:32,550 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:32:32 WrapperNode [2022-11-19 07:32:32,550 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 07:32:32,551 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 07:32:32,551 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 07:32:32,551 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 07:32:32,558 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:32:32" (1/1) ... [2022-11-19 07:32:32,586 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:32:32" (1/1) ... [2022-11-19 07:32:32,646 INFO L138 Inliner]: procedures = 88, calls = 338, calls flagged for inlining = 23, calls inlined = 20, statements flattened = 798 [2022-11-19 07:32:32,663 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 07:32:32,664 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 07:32:32,664 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 07:32:32,664 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 07:32:32,674 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:32:32" (1/1) ... [2022-11-19 07:32:32,674 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:32:32" (1/1) ... [2022-11-19 07:32:32,680 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:32:32" (1/1) ... [2022-11-19 07:32:32,680 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:32:32" (1/1) ... [2022-11-19 07:32:32,728 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:32:32" (1/1) ... [2022-11-19 07:32:32,758 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:32:32" (1/1) ... [2022-11-19 07:32:32,762 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:32:32" (1/1) ... [2022-11-19 07:32:32,775 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:32:32" (1/1) ... [2022-11-19 07:32:32,791 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 07:32:32,799 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 07:32:32,800 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 07:32:32,800 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 07:32:32,801 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:32:32" (1/1) ... [2022-11-19 07:32:32,814 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:32:32,835 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c986a09d-f159-4289-95a9-f0114d2f8c45/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:32:32,856 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c986a09d-f159-4289-95a9-f0114d2f8c45/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 07:32:32,871 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c986a09d-f159-4289-95a9-f0114d2f8c45/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 07:32:32,908 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-19 07:32:32,909 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2022-11-19 07:32:32,909 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2022-11-19 07:32:32,909 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2022-11-19 07:32:32,909 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2022-11-19 07:32:32,909 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2022-11-19 07:32:32,909 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2022-11-19 07:32:32,910 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2022-11-19 07:32:32,910 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2022-11-19 07:32:32,910 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2022-11-19 07:32:32,910 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2022-11-19 07:32:32,910 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2022-11-19 07:32:32,911 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2022-11-19 07:32:32,911 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2022-11-19 07:32:32,911 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2022-11-19 07:32:32,911 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2022-11-19 07:32:32,911 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2022-11-19 07:32:32,912 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2022-11-19 07:32:32,912 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2022-11-19 07:32:32,912 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2022-11-19 07:32:32,912 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2022-11-19 07:32:32,912 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2022-11-19 07:32:32,912 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2022-11-19 07:32:32,912 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2022-11-19 07:32:32,913 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2022-11-19 07:32:32,913 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2022-11-19 07:32:32,913 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2022-11-19 07:32:32,913 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2022-11-19 07:32:32,914 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2022-11-19 07:32:32,914 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2022-11-19 07:32:32,914 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2022-11-19 07:32:32,914 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2022-11-19 07:32:32,914 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2022-11-19 07:32:32,914 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2022-11-19 07:32:32,915 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2022-11-19 07:32:32,915 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2022-11-19 07:32:32,915 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2022-11-19 07:32:32,915 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2022-11-19 07:32:32,915 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2022-11-19 07:32:32,915 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-19 07:32:32,916 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2022-11-19 07:32:32,916 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2022-11-19 07:32:32,916 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2022-11-19 07:32:32,917 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2022-11-19 07:32:32,917 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2022-11-19 07:32:32,917 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2022-11-19 07:32:32,918 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2022-11-19 07:32:32,918 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2022-11-19 07:32:32,919 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 07:32:32,920 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 07:32:32,920 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2022-11-19 07:32:32,920 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2022-11-19 07:32:33,098 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 07:32:33,101 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 07:32:34,348 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 07:32:35,066 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 07:32:35,066 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-19 07:32:35,071 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:32:35 BoogieIcfgContainer [2022-11-19 07:32:35,071 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 07:32:35,075 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 07:32:35,075 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 07:32:35,079 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 07:32:35,079 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:32:31" (1/3) ... [2022-11-19 07:32:35,080 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68349308 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:32:35, skipping insertion in model container [2022-11-19 07:32:35,080 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:32:32" (2/3) ... [2022-11-19 07:32:35,081 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68349308 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:32:35, skipping insertion in model container [2022-11-19 07:32:35,081 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:32:35" (3/3) ... [2022-11-19 07:32:35,082 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec3_product17.cil.c [2022-11-19 07:32:35,102 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 07:32:35,103 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-19 07:32:35,204 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 07:32:35,215 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;@315f97dc, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 07:32:35,216 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-19 07:32:35,224 INFO L276 IsEmpty]: Start isEmpty. Operand has 383 states, 257 states have (on average 1.5914396887159532) internal successors, (409), 275 states have internal predecessors, (409), 100 states have call successors, (100), 24 states have call predecessors, (100), 24 states have return successors, (100), 97 states have call predecessors, (100), 100 states have call successors, (100) [2022-11-19 07:32:35,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-11-19 07:32:35,254 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:32:35,255 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:32:35,256 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:32:35,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:32:35,264 INFO L85 PathProgramCache]: Analyzing trace with hash -1922019369, now seen corresponding path program 1 times [2022-11-19 07:32:35,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:32:35,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951391911] [2022-11-19 07:32:35,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:32:35,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:32:35,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:32:36,107 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:32:36,108 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:32:36,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951391911] [2022-11-19 07:32:36,109 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951391911] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:32:36,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644704644] [2022-11-19 07:32:36,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:32:36,110 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:32:36,110 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c986a09d-f159-4289-95a9-f0114d2f8c45/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:32:36,119 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c986a09d-f159-4289-95a9-f0114d2f8c45/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:32:36,124 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c986a09d-f159-4289-95a9-f0114d2f8c45/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-19 07:32:36,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:32:36,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 1524 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 07:32:36,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:32:36,725 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:32:36,725 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:32:36,726 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [644704644] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:32:36,726 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:32:36,726 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-19 07:32:36,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521347770] [2022-11-19 07:32:36,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:32:36,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:32:36,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:32:36,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:32:36,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-19 07:32:36,767 INFO L87 Difference]: Start difference. First operand has 383 states, 257 states have (on average 1.5914396887159532) internal successors, (409), 275 states have internal predecessors, (409), 100 states have call successors, (100), 24 states have call predecessors, (100), 24 states have return successors, (100), 97 states have call predecessors, (100), 100 states have call successors, (100) Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 3 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-19 07:32:37,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:32:37,195 INFO L93 Difference]: Finished difference Result 1074 states and 1734 transitions. [2022-11-19 07:32:37,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:32:37,198 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 3 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 64 [2022-11-19 07:32:37,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:32:37,218 INFO L225 Difference]: With dead ends: 1074 [2022-11-19 07:32:37,218 INFO L226 Difference]: Without dead ends: 693 [2022-11-19 07:32:37,229 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-19 07:32:37,232 INFO L413 NwaCegarLoop]: 995 mSDtfsCounter, 494 mSDsluCounter, 554 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 494 SdHoareTripleChecker+Valid, 1549 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:32:37,233 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [494 Valid, 1549 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 07:32:37,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 693 states. [2022-11-19 07:32:37,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 693 to 681. [2022-11-19 07:32:37,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 681 states, 462 states have (on average 1.5844155844155845) internal successors, (732), 493 states have internal predecessors, (732), 176 states have call successors, (176), 43 states have call predecessors, (176), 42 states have return successors, (178), 170 states have call predecessors, (178), 173 states have call successors, (178) [2022-11-19 07:32:37,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 681 states to 681 states and 1086 transitions. [2022-11-19 07:32:37,462 INFO L78 Accepts]: Start accepts. Automaton has 681 states and 1086 transitions. Word has length 64 [2022-11-19 07:32:37,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:32:37,464 INFO L495 AbstractCegarLoop]: Abstraction has 681 states and 1086 transitions. [2022-11-19 07:32:37,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 3 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-19 07:32:37,465 INFO L276 IsEmpty]: Start isEmpty. Operand 681 states and 1086 transitions. [2022-11-19 07:32:37,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-19 07:32:37,475 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:32:37,475 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:32:37,492 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c986a09d-f159-4289-95a9-f0114d2f8c45/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-19 07:32:37,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c986a09d-f159-4289-95a9-f0114d2f8c45/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:32:37,688 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:32:37,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:32:37,688 INFO L85 PathProgramCache]: Analyzing trace with hash -210879891, now seen corresponding path program 1 times [2022-11-19 07:32:37,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:32:37,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447078344] [2022-11-19 07:32:37,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:32:37,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:32:37,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:32:38,125 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:32:38,125 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:32:38,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447078344] [2022-11-19 07:32:38,130 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447078344] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:32:38,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619688095] [2022-11-19 07:32:38,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:32:38,132 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:32:38,132 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c986a09d-f159-4289-95a9-f0114d2f8c45/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:32:38,133 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c986a09d-f159-4289-95a9-f0114d2f8c45/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:32:38,141 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c986a09d-f159-4289-95a9-f0114d2f8c45/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-19 07:32:38,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:32:38,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 1512 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 07:32:38,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:32:38,585 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:32:38,586 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:32:38,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1619688095] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:32:38,586 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:32:38,586 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-19 07:32:38,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681709818] [2022-11-19 07:32:38,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:32:38,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:32:38,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:32:38,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:32:38,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-19 07:32:38,589 INFO L87 Difference]: Start difference. First operand 681 states and 1086 transitions. Second operand has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-19 07:32:38,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:32:38,804 INFO L93 Difference]: Finished difference Result 1666 states and 2688 transitions. [2022-11-19 07:32:38,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:32:38,805 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 63 [2022-11-19 07:32:38,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:32:38,813 INFO L225 Difference]: With dead ends: 1666 [2022-11-19 07:32:38,813 INFO L226 Difference]: Without dead ends: 997 [2022-11-19 07:32:38,819 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-19 07:32:38,820 INFO L413 NwaCegarLoop]: 639 mSDtfsCounter, 550 mSDsluCounter, 476 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 550 SdHoareTripleChecker+Valid, 1115 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:32:38,821 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [550 Valid, 1115 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:32:38,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 997 states. [2022-11-19 07:32:38,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 997 to 973. [2022-11-19 07:32:38,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 973 states, 664 states have (on average 1.5933734939759037) internal successors, (1058), 710 states have internal predecessors, (1058), 249 states have call successors, (249), 59 states have call predecessors, (249), 59 states have return successors, (256), 242 states have call predecessors, (256), 246 states have call successors, (256) [2022-11-19 07:32:38,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 973 states to 973 states and 1563 transitions. [2022-11-19 07:32:38,893 INFO L78 Accepts]: Start accepts. Automaton has 973 states and 1563 transitions. Word has length 63 [2022-11-19 07:32:38,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:32:38,893 INFO L495 AbstractCegarLoop]: Abstraction has 973 states and 1563 transitions. [2022-11-19 07:32:38,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-19 07:32:38,894 INFO L276 IsEmpty]: Start isEmpty. Operand 973 states and 1563 transitions. [2022-11-19 07:32:38,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-11-19 07:32:38,898 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:32:38,898 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:32:38,915 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c986a09d-f159-4289-95a9-f0114d2f8c45/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-19 07:32:39,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c986a09d-f159-4289-95a9-f0114d2f8c45/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:32:39,106 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:32:39,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:32:39,106 INFO L85 PathProgramCache]: Analyzing trace with hash -463813269, now seen corresponding path program 1 times [2022-11-19 07:32:39,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:32:39,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998725295] [2022-11-19 07:32:39,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:32:39,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:32:39,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:32:39,585 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:32:39,585 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:32:39,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998725295] [2022-11-19 07:32:39,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998725295] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:32:39,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [184700520] [2022-11-19 07:32:39,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:32:39,586 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:32:39,586 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c986a09d-f159-4289-95a9-f0114d2f8c45/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:32:39,587 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c986a09d-f159-4289-95a9-f0114d2f8c45/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:32:39,615 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c986a09d-f159-4289-95a9-f0114d2f8c45/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-19 07:32:39,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:32:39,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 1523 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-19 07:32:39,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:32:40,044 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:32:40,044 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:32:40,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [184700520] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:32:40,045 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:32:40,045 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2022-11-19 07:32:40,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856737804] [2022-11-19 07:32:40,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:32:40,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:32:40,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:32:40,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:32:40,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-19 07:32:40,047 INFO L87 Difference]: Start difference. First operand 973 states and 1563 transitions. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 3 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-19 07:32:40,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:32:40,411 INFO L93 Difference]: Finished difference Result 2778 states and 4510 transitions. [2022-11-19 07:32:40,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:32:40,412 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 3 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) Word has length 64 [2022-11-19 07:32:40,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:32:40,428 INFO L225 Difference]: With dead ends: 2778 [2022-11-19 07:32:40,429 INFO L226 Difference]: Without dead ends: 1817 [2022-11-19 07:32:40,437 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-19 07:32:40,441 INFO L413 NwaCegarLoop]: 683 mSDtfsCounter, 481 mSDsluCounter, 490 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 481 SdHoareTripleChecker+Valid, 1173 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:32:40,443 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [481 Valid, 1173 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 07:32:40,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1817 states. [2022-11-19 07:32:40,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1817 to 1795. [2022-11-19 07:32:40,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1795 states, 1216 states have (on average 1.544407894736842) internal successors, (1878), 1306 states have internal predecessors, (1878), 468 states have call successors, (468), 112 states have call predecessors, (468), 110 states have return successors, (503), 451 states have call predecessors, (503), 464 states have call successors, (503) [2022-11-19 07:32:40,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1795 states to 1795 states and 2849 transitions. [2022-11-19 07:32:40,574 INFO L78 Accepts]: Start accepts. Automaton has 1795 states and 2849 transitions. Word has length 64 [2022-11-19 07:32:40,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:32:40,575 INFO L495 AbstractCegarLoop]: Abstraction has 1795 states and 2849 transitions. [2022-11-19 07:32:40,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 3 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-19 07:32:40,577 INFO L276 IsEmpty]: Start isEmpty. Operand 1795 states and 2849 transitions. [2022-11-19 07:32:40,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-19 07:32:40,581 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:32:40,586 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:32:40,600 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c986a09d-f159-4289-95a9-f0114d2f8c45/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-19 07:32:40,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c986a09d-f159-4289-95a9-f0114d2f8c45/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:32:40,795 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:32:40,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:32:40,796 INFO L85 PathProgramCache]: Analyzing trace with hash -1317339515, now seen corresponding path program 1 times [2022-11-19 07:32:40,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:32:40,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614115504] [2022-11-19 07:32:40,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:32:40,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:32:40,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:32:41,165 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:32:41,166 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:32:41,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614115504] [2022-11-19 07:32:41,166 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614115504] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:32:41,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295275817] [2022-11-19 07:32:41,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:32:41,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:32:41,167 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c986a09d-f159-4289-95a9-f0114d2f8c45/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:32:41,168 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c986a09d-f159-4289-95a9-f0114d2f8c45/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:32:41,195 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c986a09d-f159-4289-95a9-f0114d2f8c45/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-19 07:32:41,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:32:41,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 1539 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-19 07:32:41,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:32:41,592 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:32:41,592 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:32:41,592 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1295275817] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:32:41,593 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:32:41,593 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 10 [2022-11-19 07:32:41,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680872825] [2022-11-19 07:32:41,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:32:41,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:32:41,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:32:41,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:32:41,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-11-19 07:32:41,596 INFO L87 Difference]: Start difference. First operand 1795 states and 2849 transitions. Second operand has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-19 07:32:42,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:32:42,084 INFO L93 Difference]: Finished difference Result 3490 states and 5650 transitions. [2022-11-19 07:32:42,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 07:32:42,084 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 68 [2022-11-19 07:32:42,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:32:42,105 INFO L225 Difference]: With dead ends: 3490 [2022-11-19 07:32:42,105 INFO L226 Difference]: Without dead ends: 2337 [2022-11-19 07:32:42,113 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-11-19 07:32:42,115 INFO L413 NwaCegarLoop]: 624 mSDtfsCounter, 139 mSDsluCounter, 1135 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 1759 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 07:32:42,117 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 1759 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 07:32:42,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2337 states. [2022-11-19 07:32:42,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2337 to 2071. [2022-11-19 07:32:42,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2071 states, 1358 states have (on average 1.5316642120765833) internal successors, (2080), 1487 states have internal predecessors, (2080), 599 states have call successors, (599), 112 states have call predecessors, (599), 113 states have return successors, (646), 582 states have call predecessors, (646), 595 states have call successors, (646) [2022-11-19 07:32:42,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2071 states to 2071 states and 3325 transitions. [2022-11-19 07:32:42,280 INFO L78 Accepts]: Start accepts. Automaton has 2071 states and 3325 transitions. Word has length 68 [2022-11-19 07:32:42,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:32:42,281 INFO L495 AbstractCegarLoop]: Abstraction has 2071 states and 3325 transitions. [2022-11-19 07:32:42,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-19 07:32:42,282 INFO L276 IsEmpty]: Start isEmpty. Operand 2071 states and 3325 transitions. [2022-11-19 07:32:42,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-11-19 07:32:42,285 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:32:42,285 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:32:42,299 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c986a09d-f159-4289-95a9-f0114d2f8c45/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-19 07:32:42,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c986a09d-f159-4289-95a9-f0114d2f8c45/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:32:42,493 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:32:42,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:32:42,494 INFO L85 PathProgramCache]: Analyzing trace with hash -1485936470, now seen corresponding path program 1 times [2022-11-19 07:32:42,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:32:42,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113991258] [2022-11-19 07:32:42,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:32:42,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:32:42,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:32:42,979 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-19 07:32:42,980 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:32:42,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113991258] [2022-11-19 07:32:42,980 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113991258] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:32:42,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1476000330] [2022-11-19 07:32:42,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:32:42,981 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:32:42,981 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c986a09d-f159-4289-95a9-f0114d2f8c45/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:32:42,982 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c986a09d-f159-4289-95a9-f0114d2f8c45/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:32:43,011 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c986a09d-f159-4289-95a9-f0114d2f8c45/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-19 07:32:43,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:32:43,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 1550 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-19 07:32:43,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:32:43,532 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:32:43,532 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:32:43,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1476000330] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:32:43,533 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:32:43,533 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2022-11-19 07:32:43,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962687795] [2022-11-19 07:32:43,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:32:43,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 07:32:43,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:32:43,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 07:32:43,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-11-19 07:32:43,537 INFO L87 Difference]: Start difference. First operand 2071 states and 3325 transitions. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 4 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) [2022-11-19 07:32:44,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:32:44,413 INFO L93 Difference]: Finished difference Result 3726 states and 5957 transitions. [2022-11-19 07:32:44,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 07:32:44,415 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 4 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) Word has length 72 [2022-11-19 07:32:44,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:32:44,432 INFO L225 Difference]: With dead ends: 3726 [2022-11-19 07:32:44,432 INFO L226 Difference]: Without dead ends: 2306 [2022-11-19 07:32:44,443 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-11-19 07:32:44,444 INFO L413 NwaCegarLoop]: 708 mSDtfsCounter, 469 mSDsluCounter, 1617 mSDsCounter, 0 mSdLazyCounter, 539 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 477 SdHoareTripleChecker+Valid, 2325 SdHoareTripleChecker+Invalid, 545 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 539 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-19 07:32:44,444 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [477 Valid, 2325 Invalid, 545 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 539 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-19 07:32:44,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2306 states. [2022-11-19 07:32:44,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2306 to 2287. [2022-11-19 07:32:44,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2287 states, 1532 states have (on average 1.5163185378590078) internal successors, (2323), 1664 states have internal predecessors, (2323), 626 states have call successors, (626), 124 states have call predecessors, (626), 128 states have return successors, (676), 609 states have call predecessors, (676), 622 states have call successors, (676) [2022-11-19 07:32:44,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2287 states to 2287 states and 3625 transitions. [2022-11-19 07:32:44,611 INFO L78 Accepts]: Start accepts. Automaton has 2287 states and 3625 transitions. Word has length 72 [2022-11-19 07:32:44,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:32:44,612 INFO L495 AbstractCegarLoop]: Abstraction has 2287 states and 3625 transitions. [2022-11-19 07:32:44,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 4 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) [2022-11-19 07:32:44,612 INFO L276 IsEmpty]: Start isEmpty. Operand 2287 states and 3625 transitions. [2022-11-19 07:32:44,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-19 07:32:44,615 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:32:44,615 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:32:44,628 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c986a09d-f159-4289-95a9-f0114d2f8c45/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-19 07:32:44,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c986a09d-f159-4289-95a9-f0114d2f8c45/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:32:44,829 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:32:44,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:32:44,830 INFO L85 PathProgramCache]: Analyzing trace with hash 1163638822, now seen corresponding path program 1 times [2022-11-19 07:32:44,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:32:44,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250158171] [2022-11-19 07:32:44,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:32:44,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:32:44,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:32:45,185 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-19 07:32:45,185 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:32:45,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250158171] [2022-11-19 07:32:45,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250158171] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:32:45,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769757034] [2022-11-19 07:32:45,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:32:45,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:32:45,188 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c986a09d-f159-4289-95a9-f0114d2f8c45/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:32:45,191 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c986a09d-f159-4289-95a9-f0114d2f8c45/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:32:45,211 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c986a09d-f159-4289-95a9-f0114d2f8c45/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-19 07:32:45,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:32:45,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 1539 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 07:32:45,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:32:45,597 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:32:45,597 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:32:45,597 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [769757034] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:32:45,598 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:32:45,598 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2022-11-19 07:32:45,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020021690] [2022-11-19 07:32:45,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:32:45,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:32:45,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:32:45,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:32:45,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-19 07:32:45,600 INFO L87 Difference]: Start difference. First operand 2287 states and 3625 transitions. Second operand has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-19 07:32:45,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:32:45,957 INFO L93 Difference]: Finished difference Result 4310 states and 6908 transitions. [2022-11-19 07:32:45,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 07:32:45,958 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 73 [2022-11-19 07:32:45,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:32:45,973 INFO L225 Difference]: With dead ends: 4310 [2022-11-19 07:32:45,973 INFO L226 Difference]: Without dead ends: 2287 [2022-11-19 07:32:45,986 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-11-19 07:32:45,988 INFO L413 NwaCegarLoop]: 600 mSDtfsCounter, 273 mSDsluCounter, 952 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 1552 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:32:45,989 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [284 Valid, 1552 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 07:32:45,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2287 states. [2022-11-19 07:32:46,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2287 to 2287. [2022-11-19 07:32:46,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2287 states, 1532 states have (on average 1.481070496083551) internal successors, (2269), 1664 states have internal predecessors, (2269), 626 states have call successors, (626), 124 states have call predecessors, (626), 128 states have return successors, (676), 609 states have call predecessors, (676), 622 states have call successors, (676) [2022-11-19 07:32:46,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2287 states to 2287 states and 3571 transitions. [2022-11-19 07:32:46,233 INFO L78 Accepts]: Start accepts. Automaton has 2287 states and 3571 transitions. Word has length 73 [2022-11-19 07:32:46,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:32:46,234 INFO L495 AbstractCegarLoop]: Abstraction has 2287 states and 3571 transitions. [2022-11-19 07:32:46,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-19 07:32:46,234 INFO L276 IsEmpty]: Start isEmpty. Operand 2287 states and 3571 transitions. [2022-11-19 07:32:46,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-11-19 07:32:46,238 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:32:46,238 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:32:46,252 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c986a09d-f159-4289-95a9-f0114d2f8c45/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-19 07:32:46,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c986a09d-f159-4289-95a9-f0114d2f8c45/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-19 07:32:46,452 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:32:46,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:32:46,453 INFO L85 PathProgramCache]: Analyzing trace with hash -84286950, now seen corresponding path program 1 times [2022-11-19 07:32:46,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:32:46,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321365196] [2022-11-19 07:32:46,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:32:46,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:32:46,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:32:46,884 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-19 07:32:46,885 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:32:46,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321365196] [2022-11-19 07:32:46,885 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321365196] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:32:46,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363136546] [2022-11-19 07:32:46,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:32:46,886 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:32:46,886 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c986a09d-f159-4289-95a9-f0114d2f8c45/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:32:46,887 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c986a09d-f159-4289-95a9-f0114d2f8c45/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:32:46,904 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c986a09d-f159-4289-95a9-f0114d2f8c45/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-19 07:32:47,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:32:47,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 1549 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-19 07:32:47,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:32:47,583 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 07:32:47,583 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:32:47,896 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-19 07:32:47,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [363136546] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-19 07:32:47,897 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-19 07:32:47,897 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [6, 9] total 16 [2022-11-19 07:32:47,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163044866] [2022-11-19 07:32:47,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:32:47,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-19 07:32:47,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:32:47,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-19 07:32:47,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2022-11-19 07:32:47,899 INFO L87 Difference]: Start difference. First operand 2287 states and 3571 transitions. Second operand has 9 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 4 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (13), 4 states have call predecessors, (13), 3 states have call successors, (13) [2022-11-19 07:32:52,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:32:52,017 INFO L93 Difference]: Finished difference Result 5633 states and 9097 transitions. [2022-11-19 07:32:52,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-19 07:32:52,019 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 4 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (13), 4 states have call predecessors, (13), 3 states have call successors, (13) Word has length 75 [2022-11-19 07:32:52,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:32:52,054 INFO L225 Difference]: With dead ends: 5633 [2022-11-19 07:32:52,055 INFO L226 Difference]: Without dead ends: 4214 [2022-11-19 07:32:52,067 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 144 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=145, Invalid=725, Unknown=0, NotChecked=0, Total=870 [2022-11-19 07:32:52,068 INFO L413 NwaCegarLoop]: 680 mSDtfsCounter, 2927 mSDsluCounter, 2169 mSDsCounter, 0 mSdLazyCounter, 2529 mSolverCounterSat, 1391 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3007 SdHoareTripleChecker+Valid, 2849 SdHoareTripleChecker+Invalid, 3920 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1391 IncrementalHoareTripleChecker+Valid, 2529 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-11-19 07:32:52,068 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3007 Valid, 2849 Invalid, 3920 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1391 Valid, 2529 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-11-19 07:32:52,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4214 states. [2022-11-19 07:32:52,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4214 to 3559. [2022-11-19 07:32:52,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3559 states, 2529 states have (on average 1.4887307236061684) internal successors, (3765), 2672 states have internal predecessors, (3765), 802 states have call successors, (802), 216 states have call predecessors, (802), 227 states have return successors, (973), 778 states have call predecessors, (973), 797 states have call successors, (973) [2022-11-19 07:32:52,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3559 states to 3559 states and 5540 transitions. [2022-11-19 07:32:52,452 INFO L78 Accepts]: Start accepts. Automaton has 3559 states and 5540 transitions. Word has length 75 [2022-11-19 07:32:52,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:32:52,452 INFO L495 AbstractCegarLoop]: Abstraction has 3559 states and 5540 transitions. [2022-11-19 07:32:52,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 4 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (13), 4 states have call predecessors, (13), 3 states have call successors, (13) [2022-11-19 07:32:52,453 INFO L276 IsEmpty]: Start isEmpty. Operand 3559 states and 5540 transitions. [2022-11-19 07:32:52,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-11-19 07:32:52,459 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:32:52,459 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:32:52,473 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c986a09d-f159-4289-95a9-f0114d2f8c45/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-19 07:32:52,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c986a09d-f159-4289-95a9-f0114d2f8c45/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:32:52,668 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:32:52,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:32:52,669 INFO L85 PathProgramCache]: Analyzing trace with hash -874265375, now seen corresponding path program 1 times [2022-11-19 07:32:52,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:32:52,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217185173] [2022-11-19 07:32:52,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:32:52,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:32:52,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:32:52,987 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-19 07:32:52,987 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:32:52,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217185173] [2022-11-19 07:32:52,988 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217185173] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:32:52,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [523031437] [2022-11-19 07:32:52,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:32:52,988 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:32:52,988 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c986a09d-f159-4289-95a9-f0114d2f8c45/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:32:52,991 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c986a09d-f159-4289-95a9-f0114d2f8c45/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:32:53,015 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c986a09d-f159-4289-95a9-f0114d2f8c45/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-19 07:32:53,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:32:53,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 1551 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-19 07:32:53,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:32:53,420 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 07:32:53,420 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:32:53,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [523031437] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:32:53,420 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:32:53,421 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2022-11-19 07:32:53,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345947678] [2022-11-19 07:32:53,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:32:53,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:32:53,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:32:53,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:32:53,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-19 07:32:53,424 INFO L87 Difference]: Start difference. First operand 3559 states and 5540 transitions. Second operand has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 4 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) [2022-11-19 07:32:54,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:32:54,363 INFO L93 Difference]: Finished difference Result 7442 states and 11785 transitions. [2022-11-19 07:32:54,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 07:32:54,364 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 4 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) Word has length 76 [2022-11-19 07:32:54,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:32:54,394 INFO L225 Difference]: With dead ends: 7442 [2022-11-19 07:32:54,394 INFO L226 Difference]: Without dead ends: 3895 [2022-11-19 07:32:54,419 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-11-19 07:32:54,420 INFO L413 NwaCegarLoop]: 706 mSDtfsCounter, 586 mSDsluCounter, 1216 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 642 SdHoareTripleChecker+Valid, 1922 SdHoareTripleChecker+Invalid, 453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 07:32:54,421 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [642 Valid, 1922 Invalid, 453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 316 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-19 07:32:54,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3895 states. [2022-11-19 07:32:54,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3895 to 3513. [2022-11-19 07:32:54,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3513 states, 2483 states have (on average 1.4800644381796215) internal successors, (3675), 2630 states have internal predecessors, (3675), 809 states have call successors, (809), 204 states have call predecessors, (809), 220 states have return successors, (1073), 774 states have call predecessors, (1073), 804 states have call successors, (1073) [2022-11-19 07:32:54,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3513 states to 3513 states and 5557 transitions. [2022-11-19 07:32:54,768 INFO L78 Accepts]: Start accepts. Automaton has 3513 states and 5557 transitions. Word has length 76 [2022-11-19 07:32:54,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:32:54,768 INFO L495 AbstractCegarLoop]: Abstraction has 3513 states and 5557 transitions. [2022-11-19 07:32:54,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 4 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) [2022-11-19 07:32:54,769 INFO L276 IsEmpty]: Start isEmpty. Operand 3513 states and 5557 transitions. [2022-11-19 07:32:54,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-11-19 07:32:54,772 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:32:54,772 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:32:54,788 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c986a09d-f159-4289-95a9-f0114d2f8c45/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-19 07:32:54,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c986a09d-f159-4289-95a9-f0114d2f8c45/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:32:54,980 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:32:54,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:32:54,981 INFO L85 PathProgramCache]: Analyzing trace with hash -1558675849, now seen corresponding path program 1 times [2022-11-19 07:32:54,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:32:54,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002619793] [2022-11-19 07:32:54,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:32:54,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:32:55,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:32:55,225 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-19 07:32:55,225 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:32:55,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002619793] [2022-11-19 07:32:55,226 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002619793] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:32:55,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072286626] [2022-11-19 07:32:55,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:32:55,226 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:32:55,226 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c986a09d-f159-4289-95a9-f0114d2f8c45/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:32:55,227 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c986a09d-f159-4289-95a9-f0114d2f8c45/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:32:55,253 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c986a09d-f159-4289-95a9-f0114d2f8c45/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-19 07:32:55,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:32:55,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 1539 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 07:32:55,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:32:55,686 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:32:55,686 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:32:55,686 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2072286626] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:32:55,687 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:32:55,687 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-19 07:32:55,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068064492] [2022-11-19 07:32:55,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:32:55,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:32:55,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:32:55,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:32:55,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-19 07:32:55,690 INFO L87 Difference]: Start difference. First operand 3513 states and 5557 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2022-11-19 07:32:56,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:32:56,162 INFO L93 Difference]: Finished difference Result 7855 states and 12548 transitions. [2022-11-19 07:32:56,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:32:56,162 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 75 [2022-11-19 07:32:56,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:32:56,200 INFO L225 Difference]: With dead ends: 7855 [2022-11-19 07:32:56,200 INFO L226 Difference]: Without dead ends: 4354 [2022-11-19 07:32:56,224 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-19 07:32:56,225 INFO L413 NwaCegarLoop]: 670 mSDtfsCounter, 528 mSDsluCounter, 463 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 528 SdHoareTripleChecker+Valid, 1133 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:32:56,225 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [528 Valid, 1133 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:32:56,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4354 states. [2022-11-19 07:32:56,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4354 to 3468. [2022-11-19 07:32:56,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3468 states, 2453 states have (on average 1.4757439869547493) internal successors, (3620), 2598 states have internal predecessors, (3620), 800 states have call successors, (800), 201 states have call predecessors, (800), 214 states have return successors, (1033), 764 states have call predecessors, (1033), 795 states have call successors, (1033) [2022-11-19 07:32:56,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3468 states to 3468 states and 5453 transitions. [2022-11-19 07:32:56,590 INFO L78 Accepts]: Start accepts. Automaton has 3468 states and 5453 transitions. Word has length 75 [2022-11-19 07:32:56,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:32:56,590 INFO L495 AbstractCegarLoop]: Abstraction has 3468 states and 5453 transitions. [2022-11-19 07:32:56,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2022-11-19 07:32:56,591 INFO L276 IsEmpty]: Start isEmpty. Operand 3468 states and 5453 transitions. [2022-11-19 07:32:56,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-11-19 07:32:56,593 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:32:56,593 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:32:56,606 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c986a09d-f159-4289-95a9-f0114d2f8c45/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-19 07:32:56,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c986a09d-f159-4289-95a9-f0114d2f8c45/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:32:56,801 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:32:56,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:32:56,802 INFO L85 PathProgramCache]: Analyzing trace with hash -1607611056, now seen corresponding path program 1 times [2022-11-19 07:32:56,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:32:56,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696606087] [2022-11-19 07:32:56,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:32:56,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:32:56,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:32:57,182 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-19 07:32:57,183 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:32:57,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696606087] [2022-11-19 07:32:57,183 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696606087] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:32:57,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685915485] [2022-11-19 07:32:57,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:32:57,184 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:32:57,184 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c986a09d-f159-4289-95a9-f0114d2f8c45/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:32:57,185 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c986a09d-f159-4289-95a9-f0114d2f8c45/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:32:57,215 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c986a09d-f159-4289-95a9-f0114d2f8c45/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-19 07:32:57,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:32:57,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 1566 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-19 07:32:57,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:32:57,737 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 07:32:57,737 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:32:57,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [685915485] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:32:57,737 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:32:57,737 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2022-11-19 07:32:57,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055641897] [2022-11-19 07:32:57,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:32:57,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 07:32:57,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:32:57,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 07:32:57,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-19 07:32:57,740 INFO L87 Difference]: Start difference. First operand 3468 states and 5453 transitions. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 4 states have call successors, (16), 3 states have call predecessors, (16), 4 states have return successors, (14), 3 states have call predecessors, (14), 4 states have call successors, (14) [2022-11-19 07:32:58,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:32:58,653 INFO L93 Difference]: Finished difference Result 6364 states and 10040 transitions. [2022-11-19 07:32:58,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 07:32:58,654 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 4 states have call successors, (16), 3 states have call predecessors, (16), 4 states have return successors, (14), 3 states have call predecessors, (14), 4 states have call successors, (14) Word has length 79 [2022-11-19 07:32:58,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:32:58,683 INFO L225 Difference]: With dead ends: 6364 [2022-11-19 07:32:58,690 INFO L226 Difference]: Without dead ends: 3489 [2022-11-19 07:32:58,703 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-11-19 07:32:58,704 INFO L413 NwaCegarLoop]: 730 mSDtfsCounter, 414 mSDsluCounter, 1827 mSDsCounter, 0 mSdLazyCounter, 363 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 414 SdHoareTripleChecker+Valid, 2557 SdHoareTripleChecker+Invalid, 369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 363 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-19 07:32:58,705 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [414 Valid, 2557 Invalid, 369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 363 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-19 07:32:58,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3489 states. [2022-11-19 07:32:58,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3489 to 3472. [2022-11-19 07:32:58,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3472 states, 2453 states have (on average 1.4757439869547493) internal successors, (3620), 2602 states have internal predecessors, (3620), 804 states have call successors, (804), 201 states have call predecessors, (804), 214 states have return successors, (1037), 764 states have call predecessors, (1037), 799 states have call successors, (1037) [2022-11-19 07:32:59,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3472 states to 3472 states and 5461 transitions. [2022-11-19 07:32:59,001 INFO L78 Accepts]: Start accepts. Automaton has 3472 states and 5461 transitions. Word has length 79 [2022-11-19 07:32:59,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:32:59,002 INFO L495 AbstractCegarLoop]: Abstraction has 3472 states and 5461 transitions. [2022-11-19 07:32:59,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 4 states have call successors, (16), 3 states have call predecessors, (16), 4 states have return successors, (14), 3 states have call predecessors, (14), 4 states have call successors, (14) [2022-11-19 07:32:59,002 INFO L276 IsEmpty]: Start isEmpty. Operand 3472 states and 5461 transitions. [2022-11-19 07:32:59,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-11-19 07:32:59,007 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:32:59,007 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:32:59,021 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c986a09d-f159-4289-95a9-f0114d2f8c45/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-19 07:32:59,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c986a09d-f159-4289-95a9-f0114d2f8c45/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-19 07:32:59,216 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:32:59,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:32:59,216 INFO L85 PathProgramCache]: Analyzing trace with hash 1380506028, now seen corresponding path program 1 times [2022-11-19 07:32:59,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:32:59,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530772198] [2022-11-19 07:32:59,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:32:59,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:32:59,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:32:59,620 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-19 07:32:59,620 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:32:59,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530772198] [2022-11-19 07:32:59,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530772198] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:32:59,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98115662] [2022-11-19 07:32:59,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:32:59,621 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:32:59,621 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c986a09d-f159-4289-95a9-f0114d2f8c45/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:32:59,623 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c986a09d-f159-4289-95a9-f0114d2f8c45/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:32:59,631 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c986a09d-f159-4289-95a9-f0114d2f8c45/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-19 07:33:00,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:33:00,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 1638 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-19 07:33:00,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:33:00,100 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-19 07:33:00,100 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:33:00,100 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [98115662] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:33:00,101 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:33:00,101 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2022-11-19 07:33:00,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484360171] [2022-11-19 07:33:00,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:33:00,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 07:33:00,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:33:00,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 07:33:00,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-19 07:33:00,103 INFO L87 Difference]: Start difference. First operand 3472 states and 5461 transitions. Second operand has 5 states, 5 states have (on average 11.4) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 3 states have call predecessors, (18), 2 states have call successors, (18) [2022-11-19 07:33:00,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:33:00,571 INFO L93 Difference]: Finished difference Result 6681 states and 10752 transitions. [2022-11-19 07:33:00,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 07:33:00,571 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 3 states have call predecessors, (18), 2 states have call successors, (18) Word has length 99 [2022-11-19 07:33:00,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:33:00,596 INFO L225 Difference]: With dead ends: 6681 [2022-11-19 07:33:00,596 INFO L226 Difference]: Without dead ends: 3663 [2022-11-19 07:33:00,613 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-19 07:33:00,614 INFO L413 NwaCegarLoop]: 564 mSDtfsCounter, 13 mSDsluCounter, 1660 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 2224 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:33:00,614 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 2224 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 07:33:00,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3663 states. [2022-11-19 07:33:00,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3663 to 3546. [2022-11-19 07:33:00,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3546 states, 2503 states have (on average 1.4662405113863364) internal successors, (3670), 2661 states have internal predecessors, (3670), 808 states have call successors, (808), 201 states have call predecessors, (808), 234 states have return successors, (1159), 779 states have call predecessors, (1159), 803 states have call successors, (1159) [2022-11-19 07:33:00,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3546 states to 3546 states and 5637 transitions. [2022-11-19 07:33:00,895 INFO L78 Accepts]: Start accepts. Automaton has 3546 states and 5637 transitions. Word has length 99 [2022-11-19 07:33:00,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:33:00,896 INFO L495 AbstractCegarLoop]: Abstraction has 3546 states and 5637 transitions. [2022-11-19 07:33:00,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 3 states have call predecessors, (18), 2 states have call successors, (18) [2022-11-19 07:33:00,896 INFO L276 IsEmpty]: Start isEmpty. Operand 3546 states and 5637 transitions. [2022-11-19 07:33:00,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-11-19 07:33:00,903 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:33:00,904 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:33:00,920 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c986a09d-f159-4289-95a9-f0114d2f8c45/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-19 07:33:01,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c986a09d-f159-4289-95a9-f0114d2f8c45/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:33:01,112 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:33:01,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:33:01,112 INFO L85 PathProgramCache]: Analyzing trace with hash 509025896, now seen corresponding path program 1 times [2022-11-19 07:33:01,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:33:01,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443968341] [2022-11-19 07:33:01,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:33:01,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:33:01,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:33:01,426 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-19 07:33:01,426 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:33:01,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443968341] [2022-11-19 07:33:01,427 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443968341] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:33:01,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66706406] [2022-11-19 07:33:01,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:33:01,427 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:33:01,427 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c986a09d-f159-4289-95a9-f0114d2f8c45/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:33:01,431 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c986a09d-f159-4289-95a9-f0114d2f8c45/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:33:01,459 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c986a09d-f159-4289-95a9-f0114d2f8c45/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-19 07:33:01,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:33:01,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 1875 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-19 07:33:01,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:33:01,980 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-19 07:33:01,980 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:33:01,980 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [66706406] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:33:01,981 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:33:01,981 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 14 [2022-11-19 07:33:01,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392028678] [2022-11-19 07:33:01,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:33:01,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-19 07:33:01,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:33:01,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-19 07:33:01,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2022-11-19 07:33:01,983 INFO L87 Difference]: Start difference. First operand 3546 states and 5637 transitions. Second operand has 8 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 5 states have call successors, (21), 4 states have call predecessors, (21), 5 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) [2022-11-19 07:33:05,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:33:05,772 INFO L93 Difference]: Finished difference Result 7879 states and 12725 transitions. [2022-11-19 07:33:05,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-19 07:33:05,773 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 5 states have call successors, (21), 4 states have call predecessors, (21), 5 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) Word has length 117 [2022-11-19 07:33:05,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:33:05,803 INFO L225 Difference]: With dead ends: 7879 [2022-11-19 07:33:05,803 INFO L226 Difference]: Without dead ends: 4229 [2022-11-19 07:33:05,822 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2022-11-19 07:33:05,822 INFO L413 NwaCegarLoop]: 409 mSDtfsCounter, 1624 mSDsluCounter, 1141 mSDsCounter, 0 mSdLazyCounter, 3724 mSolverCounterSat, 1063 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1657 SdHoareTripleChecker+Valid, 1550 SdHoareTripleChecker+Invalid, 4787 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1063 IncrementalHoareTripleChecker+Valid, 3724 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:33:05,823 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1657 Valid, 1550 Invalid, 4787 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1063 Valid, 3724 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-11-19 07:33:05,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4229 states. [2022-11-19 07:33:06,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4229 to 3541. [2022-11-19 07:33:06,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3541 states, 2498 states have (on average 1.466773418734988) internal successors, (3664), 2656 states have internal predecessors, (3664), 808 states have call successors, (808), 201 states have call predecessors, (808), 234 states have return successors, (1159), 779 states have call predecessors, (1159), 803 states have call successors, (1159) [2022-11-19 07:33:06,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3541 states to 3541 states and 5631 transitions. [2022-11-19 07:33:06,155 INFO L78 Accepts]: Start accepts. Automaton has 3541 states and 5631 transitions. Word has length 117 [2022-11-19 07:33:06,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:33:06,155 INFO L495 AbstractCegarLoop]: Abstraction has 3541 states and 5631 transitions. [2022-11-19 07:33:06,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 5 states have call successors, (21), 4 states have call predecessors, (21), 5 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) [2022-11-19 07:33:06,156 INFO L276 IsEmpty]: Start isEmpty. Operand 3541 states and 5631 transitions. [2022-11-19 07:33:06,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-11-19 07:33:06,166 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:33:06,166 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:33:06,184 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c986a09d-f159-4289-95a9-f0114d2f8c45/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-19 07:33:06,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c986a09d-f159-4289-95a9-f0114d2f8c45/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-19 07:33:06,376 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:33:06,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:33:06,377 INFO L85 PathProgramCache]: Analyzing trace with hash 501530342, now seen corresponding path program 1 times [2022-11-19 07:33:06,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:33:06,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926269183] [2022-11-19 07:33:06,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:33:06,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:33:06,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:33:06,841 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 22 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-19 07:33:06,841 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:33:06,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926269183] [2022-11-19 07:33:06,842 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926269183] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:33:06,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757011292] [2022-11-19 07:33:06,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:33:06,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:33:06,842 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c986a09d-f159-4289-95a9-f0114d2f8c45/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:33:06,843 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c986a09d-f159-4289-95a9-f0114d2f8c45/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:33:06,866 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c986a09d-f159-4289-95a9-f0114d2f8c45/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-19 07:33:07,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:33:07,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 1886 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 07:33:07,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:33:07,312 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-19 07:33:07,313 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:33:07,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1757011292] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:33:07,313 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:33:07,313 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2022-11-19 07:33:07,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216603648] [2022-11-19 07:33:07,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:33:07,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:33:07,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:33:07,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:33:07,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-19 07:33:07,316 INFO L87 Difference]: Start difference. First operand 3541 states and 5631 transitions. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 3 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) [2022-11-19 07:33:07,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:33:07,833 INFO L93 Difference]: Finished difference Result 8268 states and 13378 transitions. [2022-11-19 07:33:07,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:33:07,834 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 3 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) Word has length 118 [2022-11-19 07:33:07,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:33:07,869 INFO L225 Difference]: With dead ends: 8268 [2022-11-19 07:33:07,869 INFO L226 Difference]: Without dead ends: 4739 [2022-11-19 07:33:07,890 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-19 07:33:07,892 INFO L413 NwaCegarLoop]: 778 mSDtfsCounter, 466 mSDsluCounter, 537 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 466 SdHoareTripleChecker+Valid, 1315 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:33:07,892 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [466 Valid, 1315 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:33:07,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4739 states. [2022-11-19 07:33:08,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4739 to 4671. [2022-11-19 07:33:08,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4671 states, 3305 states have (on average 1.4686838124054462) internal successors, (4854), 3519 states have internal predecessors, (4854), 1055 states have call successors, (1055), 263 states have call predecessors, (1055), 310 states have return successors, (1504), 1020 states have call predecessors, (1504), 1050 states have call successors, (1504) [2022-11-19 07:33:08,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4671 states to 4671 states and 7413 transitions. [2022-11-19 07:33:08,455 INFO L78 Accepts]: Start accepts. Automaton has 4671 states and 7413 transitions. Word has length 118 [2022-11-19 07:33:08,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:33:08,456 INFO L495 AbstractCegarLoop]: Abstraction has 4671 states and 7413 transitions. [2022-11-19 07:33:08,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 3 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) [2022-11-19 07:33:08,456 INFO L276 IsEmpty]: Start isEmpty. Operand 4671 states and 7413 transitions. [2022-11-19 07:33:08,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-11-19 07:33:08,466 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:33:08,467 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:33:08,488 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c986a09d-f159-4289-95a9-f0114d2f8c45/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-19 07:33:08,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c986a09d-f159-4289-95a9-f0114d2f8c45/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:33:08,676 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:33:08,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:33:08,676 INFO L85 PathProgramCache]: Analyzing trace with hash -2077296492, now seen corresponding path program 1 times [2022-11-19 07:33:08,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:33:08,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143489208] [2022-11-19 07:33:08,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:33:08,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:33:08,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:33:09,050 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 25 proven. 3 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-19 07:33:09,050 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:33:09,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143489208] [2022-11-19 07:33:09,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143489208] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:33:09,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287113749] [2022-11-19 07:33:09,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:33:09,052 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:33:09,052 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c986a09d-f159-4289-95a9-f0114d2f8c45/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:33:09,053 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c986a09d-f159-4289-95a9-f0114d2f8c45/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:33:09,080 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c986a09d-f159-4289-95a9-f0114d2f8c45/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-19 07:33:09,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:33:09,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 1901 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-19 07:33:09,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:33:09,549 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-19 07:33:09,549 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:33:09,550 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [287113749] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:33:09,550 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:33:09,550 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 10 [2022-11-19 07:33:09,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75206689] [2022-11-19 07:33:09,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:33:09,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:33:09,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:33:09,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:33:09,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-19 07:33:09,552 INFO L87 Difference]: Start difference. First operand 4671 states and 7413 transitions. Second operand has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 4 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2022-11-19 07:33:11,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:33:11,033 INFO L93 Difference]: Finished difference Result 9373 states and 15236 transitions. [2022-11-19 07:33:11,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 07:33:11,035 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 4 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) Word has length 123 [2022-11-19 07:33:11,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:33:11,074 INFO L225 Difference]: With dead ends: 9373 [2022-11-19 07:33:11,074 INFO L226 Difference]: Without dead ends: 5565 [2022-11-19 07:33:11,105 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2022-11-19 07:33:11,105 INFO L413 NwaCegarLoop]: 601 mSDtfsCounter, 681 mSDsluCounter, 580 mSDsCounter, 0 mSdLazyCounter, 617 mSolverCounterSat, 162 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 736 SdHoareTripleChecker+Valid, 1181 SdHoareTripleChecker+Invalid, 779 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 162 IncrementalHoareTripleChecker+Valid, 617 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-19 07:33:11,106 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [736 Valid, 1181 Invalid, 779 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [162 Valid, 617 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-19 07:33:11,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5565 states. [2022-11-19 07:33:11,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5565 to 5449. [2022-11-19 07:33:11,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5449 states, 3753 states have (on average 1.4628297362110312) internal successors, (5490), 4013 states have internal predecessors, (5490), 1318 states have call successors, (1318), 339 states have call predecessors, (1318), 377 states have return successors, (1814), 1276 states have call predecessors, (1814), 1311 states have call successors, (1814) [2022-11-19 07:33:11,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5449 states to 5449 states and 8622 transitions. [2022-11-19 07:33:11,681 INFO L78 Accepts]: Start accepts. Automaton has 5449 states and 8622 transitions. Word has length 123 [2022-11-19 07:33:11,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:33:11,684 INFO L495 AbstractCegarLoop]: Abstraction has 5449 states and 8622 transitions. [2022-11-19 07:33:11,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 4 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2022-11-19 07:33:11,685 INFO L276 IsEmpty]: Start isEmpty. Operand 5449 states and 8622 transitions. [2022-11-19 07:33:11,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-19 07:33:11,694 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:33:11,694 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:33:11,703 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c986a09d-f159-4289-95a9-f0114d2f8c45/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-19 07:33:11,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c986a09d-f159-4289-95a9-f0114d2f8c45/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:33:11,902 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:33:11,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:33:11,903 INFO L85 PathProgramCache]: Analyzing trace with hash 1745899087, now seen corresponding path program 1 times [2022-11-19 07:33:11,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:33:11,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944654545] [2022-11-19 07:33:11,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:33:11,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:33:11,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:33:12,316 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 19 proven. 3 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-19 07:33:12,316 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:33:12,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944654545] [2022-11-19 07:33:12,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944654545] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:33:12,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084242122] [2022-11-19 07:33:12,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:33:12,317 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:33:12,317 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c986a09d-f159-4289-95a9-f0114d2f8c45/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:33:12,318 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c986a09d-f159-4289-95a9-f0114d2f8c45/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:33:12,343 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c986a09d-f159-4289-95a9-f0114d2f8c45/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-19 07:33:12,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:33:12,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 1903 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-19 07:33:12,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:33:12,799 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-19 07:33:12,799 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:33:12,800 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2084242122] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:33:12,800 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:33:12,800 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 10 [2022-11-19 07:33:12,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656564432] [2022-11-19 07:33:12,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:33:12,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:33:12,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:33:12,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:33:12,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-19 07:33:12,802 INFO L87 Difference]: Start difference. First operand 5449 states and 8622 transitions. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 4 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2022-11-19 07:33:14,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:33:14,463 INFO L93 Difference]: Finished difference Result 13085 states and 21137 transitions. [2022-11-19 07:33:14,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 07:33:14,464 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 4 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) Word has length 124 [2022-11-19 07:33:14,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:33:14,522 INFO L225 Difference]: With dead ends: 13085 [2022-11-19 07:33:14,522 INFO L226 Difference]: Without dead ends: 8477 [2022-11-19 07:33:14,560 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2022-11-19 07:33:14,560 INFO L413 NwaCegarLoop]: 862 mSDtfsCounter, 555 mSDsluCounter, 766 mSDsCounter, 0 mSdLazyCounter, 748 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 615 SdHoareTripleChecker+Valid, 1628 SdHoareTripleChecker+Invalid, 899 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 748 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-19 07:33:14,561 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [615 Valid, 1628 Invalid, 899 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 748 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-19 07:33:14,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8477 states. [2022-11-19 07:33:15,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8477 to 8459. [2022-11-19 07:33:15,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8459 states, 5713 states have (on average 1.465604761071241) internal successors, (8373), 6147 states have internal predecessors, (8373), 2160 states have call successors, (2160), 545 states have call predecessors, (2160), 585 states have return successors, (2844), 2090 states have call predecessors, (2844), 2149 states have call successors, (2844) [2022-11-19 07:33:15,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8459 states to 8459 states and 13377 transitions. [2022-11-19 07:33:15,569 INFO L78 Accepts]: Start accepts. Automaton has 8459 states and 13377 transitions. Word has length 124 [2022-11-19 07:33:15,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:33:15,569 INFO L495 AbstractCegarLoop]: Abstraction has 8459 states and 13377 transitions. [2022-11-19 07:33:15,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 4 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2022-11-19 07:33:15,570 INFO L276 IsEmpty]: Start isEmpty. Operand 8459 states and 13377 transitions. [2022-11-19 07:33:15,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-11-19 07:33:15,590 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:33:15,590 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:33:15,602 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c986a09d-f159-4289-95a9-f0114d2f8c45/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-19 07:33:15,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c986a09d-f159-4289-95a9-f0114d2f8c45/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-19 07:33:15,798 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:33:15,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:33:15,800 INFO L85 PathProgramCache]: Analyzing trace with hash 1249849006, now seen corresponding path program 1 times [2022-11-19 07:33:15,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:33:15,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867152113] [2022-11-19 07:33:15,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:33:15,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:33:15,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:33:16,253 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 19 proven. 3 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-19 07:33:16,253 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:33:16,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867152113] [2022-11-19 07:33:16,254 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867152113] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:33:16,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34295040] [2022-11-19 07:33:16,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:33:16,254 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:33:16,254 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c986a09d-f159-4289-95a9-f0114d2f8c45/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:33:16,256 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c986a09d-f159-4289-95a9-f0114d2f8c45/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:33:16,275 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c986a09d-f159-4289-95a9-f0114d2f8c45/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-19 07:33:16,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:33:16,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 1904 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-19 07:33:16,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:33:16,779 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-19 07:33:16,780 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:33:16,780 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [34295040] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:33:16,780 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:33:16,780 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [8] total 15 [2022-11-19 07:33:16,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175913358] [2022-11-19 07:33:16,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:33:16,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-19 07:33:16,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:33:16,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-19 07:33:16,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2022-11-19 07:33:16,782 INFO L87 Difference]: Start difference. First operand 8459 states and 13377 transitions. Second operand has 9 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 3 states have call successors, (23), 3 states have call predecessors, (23), 5 states have return successors, (21), 5 states have call predecessors, (21), 3 states have call successors, (21) [2022-11-19 07:33:18,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:33:18,897 INFO L93 Difference]: Finished difference Result 21090 states and 33776 transitions. [2022-11-19 07:33:18,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-19 07:33:18,898 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 3 states have call successors, (23), 3 states have call predecessors, (23), 5 states have return successors, (21), 5 states have call predecessors, (21), 3 states have call successors, (21) Word has length 125 [2022-11-19 07:33:18,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:33:18,997 INFO L225 Difference]: With dead ends: 21090 [2022-11-19 07:33:18,997 INFO L226 Difference]: Without dead ends: 13494 [2022-11-19 07:33:19,062 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2022-11-19 07:33:19,063 INFO L413 NwaCegarLoop]: 693 mSDtfsCounter, 663 mSDsluCounter, 3690 mSDsCounter, 0 mSdLazyCounter, 1000 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 722 SdHoareTripleChecker+Valid, 4383 SdHoareTripleChecker+Invalid, 1132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 1000 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-19 07:33:19,064 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [722 Valid, 4383 Invalid, 1132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 1000 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-19 07:33:19,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13494 states. [2022-11-19 07:33:20,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13494 to 12003. [2022-11-19 07:33:20,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12003 states, 8049 states have (on average 1.4678842092185365) internal successors, (11815), 8678 states have internal predecessors, (11815), 3141 states have call successors, (3141), 759 states have call predecessors, (3141), 812 states have return successors, (4275), 3057 states have call predecessors, (4275), 3124 states have call successors, (4275) [2022-11-19 07:33:20,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12003 states to 12003 states and 19231 transitions. [2022-11-19 07:33:20,482 INFO L78 Accepts]: Start accepts. Automaton has 12003 states and 19231 transitions. Word has length 125 [2022-11-19 07:33:20,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:33:20,482 INFO L495 AbstractCegarLoop]: Abstraction has 12003 states and 19231 transitions. [2022-11-19 07:33:20,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 3 states have call successors, (23), 3 states have call predecessors, (23), 5 states have return successors, (21), 5 states have call predecessors, (21), 3 states have call successors, (21) [2022-11-19 07:33:20,483 INFO L276 IsEmpty]: Start isEmpty. Operand 12003 states and 19231 transitions. [2022-11-19 07:33:20,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-11-19 07:33:20,506 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:33:20,506 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:33:20,519 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c986a09d-f159-4289-95a9-f0114d2f8c45/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-11-19 07:33:20,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c986a09d-f159-4289-95a9-f0114d2f8c45/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-19 07:33:20,714 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:33:20,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:33:20,715 INFO L85 PathProgramCache]: Analyzing trace with hash 406811950, now seen corresponding path program 1 times [2022-11-19 07:33:20,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:33:20,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874859942] [2022-11-19 07:33:20,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:33:20,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:33:20,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:33:21,236 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 25 proven. 3 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-19 07:33:21,236 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:33:21,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874859942] [2022-11-19 07:33:21,236 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874859942] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:33:21,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688082638] [2022-11-19 07:33:21,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:33:21,237 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:33:21,237 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c986a09d-f159-4289-95a9-f0114d2f8c45/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:33:21,238 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c986a09d-f159-4289-95a9-f0114d2f8c45/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:33:21,267 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c986a09d-f159-4289-95a9-f0114d2f8c45/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-19 07:33:21,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:33:21,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 1917 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-19 07:33:21,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:33:21,818 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 55 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-19 07:33:21,818 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:33:22,163 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 29 proven. 2 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-19 07:33:22,163 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [688082638] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:33:22,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1278867829] [2022-11-19 07:33:22,186 INFO L159 IcfgInterpreter]: Started Sifa with 79 locations of interest [2022-11-19 07:33:22,187 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:33:22,191 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:33:22,197 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:33:22,197 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:33:31,287 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 689 for LOIs [2022-11-19 07:34:24,497 INFO L197 IcfgInterpreter]: Interpreting procedure __automaton_fail with input of size 32 for LOIs [2022-11-19 07:34:24,501 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection with input of size 45 for LOIs [2022-11-19 07:34:24,756 INFO L197 IcfgInterpreter]: Interpreting procedure isTopFloor with input of size 39 for LOIs [2022-11-19 07:34:24,759 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 452 for LOIs [2022-11-19 07:34:24,931 INFO L197 IcfgInterpreter]: Interpreting procedure buttonForFloorIsPressed with input of size 88 for LOIs [2022-11-19 07:34:24,951 INFO L197 IcfgInterpreter]: Interpreting procedure initTopDown with input of size 599 for LOIs [2022-11-19 07:34:27,152 INFO L197 IcfgInterpreter]: Interpreting procedure initFloors with input of size 573 for LOIs [2022-11-19 07:34:27,373 INFO L197 IcfgInterpreter]: Interpreting procedure continueInDirection with input of size 42 for LOIs [2022-11-19 07:34:27,384 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentHeading with input of size 33 for LOIs [2022-11-19 07:34:27,387 INFO L197 IcfgInterpreter]: Interpreting procedure bobCall with input of size 573 for LOIs [2022-11-19 07:34:31,133 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 577 for LOIs [2022-11-19 07:34:31,750 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 505 for LOIs [2022-11-19 07:34:31,899 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:35:05,665 WARN L233 SmtUtils]: Spent 7.25s on a formula simplification. DAG size of input: 645 DAG size of output: 592 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:35:13,177 WARN L233 SmtUtils]: Spent 7.19s on a formula simplification. DAG size of input: 645 DAG size of output: 592 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:35:22,134 WARN L233 SmtUtils]: Spent 5.41s on a formula simplification. DAG size of input: 772 DAG size of output: 594 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:35:36,244 WARN L233 SmtUtils]: Spent 7.76s on a formula simplification. DAG size of input: 689 DAG size of output: 620 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:35:51,235 WARN L233 SmtUtils]: Spent 14.59s on a formula simplification. DAG size of input: 641 DAG size of output: 615 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:36:08,553 WARN L233 SmtUtils]: Spent 16.57s on a formula simplification. DAG size of input: 678 DAG size of output: 625 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:36:24,754 WARN L233 SmtUtils]: Spent 15.68s on a formula simplification. DAG size of input: 678 DAG size of output: 619 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:36:41,473 WARN L233 SmtUtils]: Spent 15.67s on a formula simplification. DAG size of input: 679 DAG size of output: 615 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:36:58,842 WARN L233 SmtUtils]: Spent 16.07s on a formula simplification. DAG size of input: 690 DAG size of output: 615 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:37:15,286 WARN L233 SmtUtils]: Spent 15.82s on a formula simplification. DAG size of input: 677 DAG size of output: 615 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:37:23,312 WARN L233 SmtUtils]: Spent 7.47s on a formula simplification. DAG size of input: 678 DAG size of output: 586 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:37:49,225 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '251129#(and (= ~head~0.offset 0) (= ~currentHeading~0 1) (<= ~floorButtons_0~0 2147483647) (= ~head~0.base 0) (= |#NULL.offset| 0) (= 0 (+ ~expectedDirection~0 1)) (<= 0 (+ ~floorButtons_0~0 2147483648)) (<= 0 |#StackHeapBarrier|) (= ~maximumWeight~0 100) (= ~cleanupTimeShifts~0 12) (= ~currentFloorID~0 1) (= |#NULL.base| 0))' at error location [2022-11-19 07:37:49,225 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:37:49,225 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:37:49,225 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2022-11-19 07:37:49,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068823644] [2022-11-19 07:37:49,226 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:37:49,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-19 07:37:49,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:37:49,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-19 07:37:49,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=492, Invalid=5514, Unknown=0, NotChecked=0, Total=6006 [2022-11-19 07:37:49,229 INFO L87 Difference]: Start difference. First operand 12003 states and 19231 transitions. Second operand has 19 states, 16 states have (on average 7.875) internal successors, (126), 16 states have internal predecessors, (126), 8 states have call successors, (49), 4 states have call predecessors, (49), 10 states have return successors, (48), 11 states have call predecessors, (48), 8 states have call successors, (48) [2022-11-19 07:38:14,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:38:14,097 INFO L93 Difference]: Finished difference Result 56628 states and 99380 transitions. [2022-11-19 07:38:14,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-11-19 07:38:14,098 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 16 states have (on average 7.875) internal successors, (126), 16 states have internal predecessors, (126), 8 states have call successors, (49), 4 states have call predecessors, (49), 10 states have return successors, (48), 11 states have call predecessors, (48), 8 states have call successors, (48) Word has length 127 [2022-11-19 07:38:14,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:38:14,439 INFO L225 Difference]: With dead ends: 56628 [2022-11-19 07:38:14,439 INFO L226 Difference]: Without dead ends: 39622 [2022-11-19 07:38:14,677 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 512 GetRequests, 333 SyntacticMatches, 12 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11648 ImplicationChecksByTransitivity, 200.3s TimeCoverageRelationStatistics Valid=1590, Invalid=26802, Unknown=0, NotChecked=0, Total=28392 [2022-11-19 07:38:14,679 INFO L413 NwaCegarLoop]: 819 mSDtfsCounter, 5743 mSDsluCounter, 7550 mSDsCounter, 0 mSdLazyCounter, 22234 mSolverCounterSat, 3894 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5897 SdHoareTripleChecker+Valid, 8369 SdHoareTripleChecker+Invalid, 26128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 3894 IncrementalHoareTripleChecker+Valid, 22234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.4s IncrementalHoareTripleChecker+Time [2022-11-19 07:38:14,680 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5897 Valid, 8369 Invalid, 26128 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [3894 Valid, 22234 Invalid, 0 Unknown, 0 Unchecked, 16.4s Time] [2022-11-19 07:38:14,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39622 states. [2022-11-19 07:38:18,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39622 to 31137. [2022-11-19 07:38:18,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31137 states, 21057 states have (on average 1.4607493945006411) internal successors, (30759), 22929 states have internal predecessors, (30759), 8077 states have call successors, (8077), 1756 states have call predecessors, (8077), 2002 states have return successors, (13141), 7469 states have call predecessors, (13141), 8049 states have call successors, (13141) [2022-11-19 07:38:18,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31137 states to 31137 states and 51977 transitions. [2022-11-19 07:38:18,973 INFO L78 Accepts]: Start accepts. Automaton has 31137 states and 51977 transitions. Word has length 127 [2022-11-19 07:38:18,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:38:18,974 INFO L495 AbstractCegarLoop]: Abstraction has 31137 states and 51977 transitions. [2022-11-19 07:38:18,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 16 states have (on average 7.875) internal successors, (126), 16 states have internal predecessors, (126), 8 states have call successors, (49), 4 states have call predecessors, (49), 10 states have return successors, (48), 11 states have call predecessors, (48), 8 states have call successors, (48) [2022-11-19 07:38:18,975 INFO L276 IsEmpty]: Start isEmpty. Operand 31137 states and 51977 transitions. [2022-11-19 07:38:18,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-11-19 07:38:18,998 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:38:18,999 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:38:19,014 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c986a09d-f159-4289-95a9-f0114d2f8c45/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-19 07:38:19,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c986a09d-f159-4289-95a9-f0114d2f8c45/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:38:19,214 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:38:19,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:38:19,215 INFO L85 PathProgramCache]: Analyzing trace with hash -1628437606, now seen corresponding path program 1 times [2022-11-19 07:38:19,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:38:19,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553545416] [2022-11-19 07:38:19,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:38:19,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:38:19,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:38:20,223 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-19 07:38:20,224 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:38:20,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553545416] [2022-11-19 07:38:20,224 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553545416] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:38:20,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570998223] [2022-11-19 07:38:20,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:38:20,225 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:38:20,225 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c986a09d-f159-4289-95a9-f0114d2f8c45/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:38:20,226 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c986a09d-f159-4289-95a9-f0114d2f8c45/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:38:20,247 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c986a09d-f159-4289-95a9-f0114d2f8c45/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-19 07:38:20,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:38:20,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 1716 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 07:38:20,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:38:20,772 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-19 07:38:20,773 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:38:20,773 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [570998223] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:38:20,773 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:38:20,773 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10] total 12 [2022-11-19 07:38:20,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873464043] [2022-11-19 07:38:20,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:38:20,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:38:20,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:38:20,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:38:20,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2022-11-19 07:38:20,775 INFO L87 Difference]: Start difference. First operand 31137 states and 51977 transitions. Second operand has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 4 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) [2022-11-19 07:38:24,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:38:24,442 INFO L93 Difference]: Finished difference Result 62894 states and 107805 transitions. [2022-11-19 07:38:24,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 07:38:24,443 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 4 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) Word has length 136 [2022-11-19 07:38:24,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:38:24,901 INFO L225 Difference]: With dead ends: 62894 [2022-11-19 07:38:24,902 INFO L226 Difference]: Without dead ends: 29088 [2022-11-19 07:38:25,286 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2022-11-19 07:38:25,287 INFO L413 NwaCegarLoop]: 617 mSDtfsCounter, 174 mSDsluCounter, 952 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 1569 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:38:25,287 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [184 Valid, 1569 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 07:38:25,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29088 states. [2022-11-19 07:38:28,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29088 to 29031. [2022-11-19 07:38:28,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29031 states, 19311 states have (on average 1.4475169592460255) internal successors, (27953), 21158 states have internal predecessors, (27953), 7790 states have call successors, (7790), 1711 states have call predecessors, (7790), 1929 states have return successors, (12500), 7179 states have call predecessors, (12500), 7762 states have call successors, (12500) [2022-11-19 07:38:28,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29031 states to 29031 states and 48243 transitions. [2022-11-19 07:38:28,842 INFO L78 Accepts]: Start accepts. Automaton has 29031 states and 48243 transitions. Word has length 136 [2022-11-19 07:38:28,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:38:28,842 INFO L495 AbstractCegarLoop]: Abstraction has 29031 states and 48243 transitions. [2022-11-19 07:38:28,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 4 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) [2022-11-19 07:38:28,843 INFO L276 IsEmpty]: Start isEmpty. Operand 29031 states and 48243 transitions. [2022-11-19 07:38:28,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-11-19 07:38:28,866 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:38:28,867 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:38:28,876 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c986a09d-f159-4289-95a9-f0114d2f8c45/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-19 07:38:29,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c986a09d-f159-4289-95a9-f0114d2f8c45/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-19 07:38:29,078 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:38:29,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:38:29,078 INFO L85 PathProgramCache]: Analyzing trace with hash 533944406, now seen corresponding path program 1 times [2022-11-19 07:38:29,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:38:29,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124436035] [2022-11-19 07:38:29,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:38:29,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:38:29,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:38:29,753 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-19 07:38:29,754 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:38:29,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124436035] [2022-11-19 07:38:29,754 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124436035] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:38:29,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700827062] [2022-11-19 07:38:29,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:38:29,754 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:38:29,754 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c986a09d-f159-4289-95a9-f0114d2f8c45/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:38:29,756 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c986a09d-f159-4289-95a9-f0114d2f8c45/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:38:29,767 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c986a09d-f159-4289-95a9-f0114d2f8c45/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-19 07:38:30,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:38:30,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 1720 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-19 07:38:30,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:38:30,437 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 20 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-19 07:38:30,438 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:38:31,059 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-19 07:38:31,059 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [700827062] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:38:31,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [769908709] [2022-11-19 07:38:31,064 INFO L159 IcfgInterpreter]: Started Sifa with 119 locations of interest [2022-11-19 07:38:31,064 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:38:31,065 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:38:31,065 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:38:31,065 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:38:36,025 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 572 for LOIs [2022-11-19 07:38:42,960 INFO L197 IcfgInterpreter]: Interpreting procedure buttonForFloorIsPressed with input of size 499 for LOIs [2022-11-19 07:38:43,674 INFO L197 IcfgInterpreter]: Interpreting procedure initTopDown with input of size 599 for LOIs [2022-11-19 07:38:46,157 INFO L197 IcfgInterpreter]: Interpreting procedure initFloors with input of size 573 for LOIs [2022-11-19 07:38:46,441 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentHeading with input of size 437 for LOIs [2022-11-19 07:38:46,533 INFO L197 IcfgInterpreter]: Interpreting procedure bobCall with input of size 573 for LOIs [2022-11-19 07:38:50,753 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 577 for LOIs [2022-11-19 07:38:51,490 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 505 for LOIs [2022-11-19 07:38:51,651 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:39:28,228 WARN L233 SmtUtils]: Spent 7.42s on a formula simplification. DAG size of input: 645 DAG size of output: 592 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:39:36,097 WARN L233 SmtUtils]: Spent 7.52s on a formula simplification. DAG size of input: 645 DAG size of output: 592 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:39:45,620 WARN L233 SmtUtils]: Spent 5.72s on a formula simplification. DAG size of input: 772 DAG size of output: 594 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:40:00,542 WARN L233 SmtUtils]: Spent 5.27s on a formula simplification. DAG size of input: 585 DAG size of output: 580 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:40:11,537 WARN L233 SmtUtils]: Spent 6.68s on a formula simplification. DAG size of input: 626 DAG size of output: 597 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:40:18,331 WARN L233 SmtUtils]: Spent 6.31s on a formula simplification. DAG size of input: 624 DAG size of output: 596 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:40:29,938 WARN L233 SmtUtils]: Spent 10.16s on a formula simplification. DAG size of input: 499 DAG size of output: 442 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:40:41,123 WARN L233 SmtUtils]: Spent 10.63s on a formula simplification. DAG size of input: 535 DAG size of output: 450 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)