./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec2_product03.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_05e201ea-3656-4950-b3bb-98e429bdc35f/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e201ea-3656-4950-b3bb-98e429bdc35f/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_05e201ea-3656-4950-b3bb-98e429bdc35f/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e201ea-3656-4950-b3bb-98e429bdc35f/bin/utaipan-I9t0OCRTmS/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec2_product03.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e201ea-3656-4950-b3bb-98e429bdc35f/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_05e201ea-3656-4950-b3bb-98e429bdc35f/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 859441835e916fdbcdc78c3c849990624cc8f637b8bbdd3bb312aaefa9b36e0f --- 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 08:01:37,329 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 08:01:37,331 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 08:01:37,354 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 08:01:37,354 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 08:01:37,360 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 08:01:37,363 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 08:01:37,368 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 08:01:37,374 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 08:01:37,375 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 08:01:37,376 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 08:01:37,377 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 08:01:37,377 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 08:01:37,378 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 08:01:37,379 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 08:01:37,381 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 08:01:37,381 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 08:01:37,382 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 08:01:37,384 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 08:01:37,386 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 08:01:37,387 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 08:01:37,389 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 08:01:37,390 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 08:01:37,391 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 08:01:37,394 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 08:01:37,395 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 08:01:37,395 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 08:01:37,396 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 08:01:37,397 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 08:01:37,398 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 08:01:37,398 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 08:01:37,399 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 08:01:37,400 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 08:01:37,400 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 08:01:37,401 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 08:01:37,402 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 08:01:37,403 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 08:01:37,403 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 08:01:37,403 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 08:01:37,404 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 08:01:37,405 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 08:01:37,406 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e201ea-3656-4950-b3bb-98e429bdc35f/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-19 08:01:37,440 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 08:01:37,441 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 08:01:37,442 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 08:01:37,442 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 08:01:37,443 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 08:01:37,443 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 08:01:37,443 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 08:01:37,444 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 08:01:37,444 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 08:01:37,444 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 08:01:37,445 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 08:01:37,445 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 08:01:37,446 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 08:01:37,446 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 08:01:37,446 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 08:01:37,446 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 08:01:37,446 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 08:01:37,447 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 08:01:37,447 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 08:01:37,448 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-19 08:01:37,448 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 08:01:37,448 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-19 08:01:37,448 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 08:01:37,450 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-19 08:01:37,450 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 08:01:37,450 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-19 08:01:37,451 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-19 08:01:37,451 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-19 08:01:37,451 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 08:01:37,451 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-19 08:01:37,451 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 08:01:37,452 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 08:01:37,452 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 08:01:37,452 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 08:01:37,453 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 08:01:37,453 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 08:01:37,453 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-19 08:01:37,453 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 08:01:37,453 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 08:01:37,454 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-19 08:01:37,454 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 08:01:37,454 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_05e201ea-3656-4950-b3bb-98e429bdc35f/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e201ea-3656-4950-b3bb-98e429bdc35f/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 859441835e916fdbcdc78c3c849990624cc8f637b8bbdd3bb312aaefa9b36e0f [2022-11-19 08:01:37,753 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 08:01:37,778 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 08:01:37,788 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 08:01:37,790 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 08:01:37,790 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 08:01:37,792 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e201ea-3656-4950-b3bb-98e429bdc35f/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/product-lines/elevator_spec2_product03.cil.c [2022-11-19 08:01:37,856 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e201ea-3656-4950-b3bb-98e429bdc35f/bin/utaipan-I9t0OCRTmS/data/a0e9a9465/09c6915a0bba48439019b3f0f6acba47/FLAG309c1f225 [2022-11-19 08:01:38,450 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 08:01:38,450 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e201ea-3656-4950-b3bb-98e429bdc35f/sv-benchmarks/c/product-lines/elevator_spec2_product03.cil.c [2022-11-19 08:01:38,485 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e201ea-3656-4950-b3bb-98e429bdc35f/bin/utaipan-I9t0OCRTmS/data/a0e9a9465/09c6915a0bba48439019b3f0f6acba47/FLAG309c1f225 [2022-11-19 08:01:38,655 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e201ea-3656-4950-b3bb-98e429bdc35f/bin/utaipan-I9t0OCRTmS/data/a0e9a9465/09c6915a0bba48439019b3f0f6acba47 [2022-11-19 08:01:38,658 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 08:01:38,659 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 08:01:38,661 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 08:01:38,661 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 08:01:38,665 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 08:01:38,666 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:01:38" (1/1) ... [2022-11-19 08:01:38,667 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@881637d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:01:38, skipping insertion in model container [2022-11-19 08:01:38,667 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:01:38" (1/1) ... [2022-11-19 08:01:38,677 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 08:01:38,761 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 08:01:39,097 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_05e201ea-3656-4950-b3bb-98e429bdc35f/sv-benchmarks/c/product-lines/elevator_spec2_product03.cil.c[29828,29841] [2022-11-19 08:01:39,305 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 08:01:39,314 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 08:01:39,364 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_05e201ea-3656-4950-b3bb-98e429bdc35f/sv-benchmarks/c/product-lines/elevator_spec2_product03.cil.c[29828,29841] [2022-11-19 08:01:39,413 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 08:01:39,437 INFO L208 MainTranslator]: Completed translation [2022-11-19 08:01:39,437 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:01:39 WrapperNode [2022-11-19 08:01:39,437 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 08:01:39,439 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 08:01:39,439 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 08:01:39,439 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 08:01:39,446 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:01:39" (1/1) ... [2022-11-19 08:01:39,481 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:01:39" (1/1) ... [2022-11-19 08:01:39,543 INFO L138 Inliner]: procedures = 92, calls = 336, calls flagged for inlining = 23, calls inlined = 20, statements flattened = 1071 [2022-11-19 08:01:39,543 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 08:01:39,544 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 08:01:39,545 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 08:01:39,545 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 08:01:39,554 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:01:39" (1/1) ... [2022-11-19 08:01:39,555 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:01:39" (1/1) ... [2022-11-19 08:01:39,561 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:01:39" (1/1) ... [2022-11-19 08:01:39,561 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:01:39" (1/1) ... [2022-11-19 08:01:39,578 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:01:39" (1/1) ... [2022-11-19 08:01:39,590 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:01:39" (1/1) ... [2022-11-19 08:01:39,608 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:01:39" (1/1) ... [2022-11-19 08:01:39,612 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:01:39" (1/1) ... [2022-11-19 08:01:39,631 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 08:01:39,631 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 08:01:39,632 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 08:01:39,632 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 08:01:39,633 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:01:39" (1/1) ... [2022-11-19 08:01:39,641 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 08:01:39,654 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e201ea-3656-4950-b3bb-98e429bdc35f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:01:39,676 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e201ea-3656-4950-b3bb-98e429bdc35f/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 08:01:39,684 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e201ea-3656-4950-b3bb-98e429bdc35f/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 08:01:39,714 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-19 08:01:39,714 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2022-11-19 08:01:39,715 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2022-11-19 08:01:39,715 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2022-11-19 08:01:39,715 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2022-11-19 08:01:39,715 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2022-11-19 08:01:39,715 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2022-11-19 08:01:39,715 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2022-11-19 08:01:39,716 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2022-11-19 08:01:39,716 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2022-11-19 08:01:39,716 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2022-11-19 08:01:39,716 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2022-11-19 08:01:39,716 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2022-11-19 08:01:39,717 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2022-11-19 08:01:39,717 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2022-11-19 08:01:39,717 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2022-11-19 08:01:39,717 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2022-11-19 08:01:39,717 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2022-11-19 08:01:39,717 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2022-11-19 08:01:39,718 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2022-11-19 08:01:39,718 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2022-11-19 08:01:39,718 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2022-11-19 08:01:39,718 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2022-11-19 08:01:39,718 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2022-11-19 08:01:39,718 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2022-11-19 08:01:39,719 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2022-11-19 08:01:39,719 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2022-11-19 08:01:39,719 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2022-11-19 08:01:39,719 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2022-11-19 08:01:39,719 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2022-11-19 08:01:39,719 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2022-11-19 08:01:39,720 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2022-11-19 08:01:39,720 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2022-11-19 08:01:39,720 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2022-11-19 08:01:39,720 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2022-11-19 08:01:39,720 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2022-11-19 08:01:39,720 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2022-11-19 08:01:39,721 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__base [2022-11-19 08:01:39,721 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__base [2022-11-19 08:01:39,721 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-19 08:01:39,721 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2022-11-19 08:01:39,721 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2022-11-19 08:01:39,721 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2022-11-19 08:01:39,722 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2022-11-19 08:01:39,722 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2022-11-19 08:01:39,722 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2022-11-19 08:01:39,722 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 08:01:39,722 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 08:01:39,723 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2022-11-19 08:01:39,723 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2022-11-19 08:01:39,866 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 08:01:39,869 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 08:01:41,127 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 08:01:41,872 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 08:01:41,872 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-19 08:01:41,877 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:01:41 BoogieIcfgContainer [2022-11-19 08:01:41,878 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 08:01:41,881 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 08:01:41,881 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 08:01:41,885 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 08:01:41,885 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 08:01:38" (1/3) ... [2022-11-19 08:01:41,886 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@309cbc6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:01:41, skipping insertion in model container [2022-11-19 08:01:41,886 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:01:39" (2/3) ... [2022-11-19 08:01:41,887 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@309cbc6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:01:41, skipping insertion in model container [2022-11-19 08:01:41,887 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:01:41" (3/3) ... [2022-11-19 08:01:41,888 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec2_product03.cil.c [2022-11-19 08:01:41,943 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 08:01:41,943 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-19 08:01:42,040 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 08:01:42,048 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;@36834837, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 08:01:42,049 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-19 08:01:42,055 INFO L276 IsEmpty]: Start isEmpty. Operand has 368 states, 249 states have (on average 1.6024096385542168) internal successors, (399), 270 states have internal predecessors, (399), 94 states have call successors, (94), 23 states have call predecessors, (94), 23 states have return successors, (94), 88 states have call predecessors, (94), 94 states have call successors, (94) [2022-11-19 08:01:42,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-11-19 08:01:42,088 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:01:42,089 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-19 08:01:42,090 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:01:42,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:01:42,096 INFO L85 PathProgramCache]: Analyzing trace with hash -22457928, now seen corresponding path program 1 times [2022-11-19 08:01:42,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:01:42,106 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263592543] [2022-11-19 08:01:42,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:01:42,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:01:42,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:01:42,569 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-19 08:01:42,570 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:01:42,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263592543] [2022-11-19 08:01:42,572 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263592543] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:01:42,572 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:01:42,572 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 08:01:42,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714356708] [2022-11-19 08:01:42,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:01:42,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-19 08:01:42,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:01:42,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-19 08:01:42,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-19 08:01:42,618 INFO L87 Difference]: Start difference. First operand has 368 states, 249 states have (on average 1.6024096385542168) internal successors, (399), 270 states have internal predecessors, (399), 94 states have call successors, (94), 23 states have call predecessors, (94), 23 states have return successors, (94), 88 states have call predecessors, (94), 94 states have call successors, (94) Second operand has 2 states, 2 states have (on average 22.5) internal successors, (45), 2 states have internal predecessors, (45), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 1 states have call successors, (12) [2022-11-19 08:01:42,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:01:42,817 INFO L93 Difference]: Finished difference Result 386 states and 614 transitions. [2022-11-19 08:01:42,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-19 08:01:42,820 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 22.5) internal successors, (45), 2 states have internal predecessors, (45), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 1 states have call successors, (12) Word has length 76 [2022-11-19 08:01:42,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:01:42,836 INFO L225 Difference]: With dead ends: 386 [2022-11-19 08:01:42,837 INFO L226 Difference]: Without dead ends: 364 [2022-11-19 08:01:42,840 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-19 08:01:42,843 INFO L413 NwaCegarLoop]: 547 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 547 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:01:42,844 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 547 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:01:42,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2022-11-19 08:01:42,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 364. [2022-11-19 08:01:42,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 247 states have (on average 1.591093117408907) internal successors, (393), 266 states have internal predecessors, (393), 94 states have call successors, (94), 23 states have call predecessors, (94), 22 states have return successors, (89), 87 states have call predecessors, (89), 89 states have call successors, (89) [2022-11-19 08:01:42,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 576 transitions. [2022-11-19 08:01:42,976 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 576 transitions. Word has length 76 [2022-11-19 08:01:42,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:01:42,979 INFO L495 AbstractCegarLoop]: Abstraction has 364 states and 576 transitions. [2022-11-19 08:01:42,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 22.5) internal successors, (45), 2 states have internal predecessors, (45), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 1 states have call successors, (12) [2022-11-19 08:01:42,981 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 576 transitions. [2022-11-19 08:01:42,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-11-19 08:01:42,991 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:01:42,992 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-19 08:01:42,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-19 08:01:42,993 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:01:42,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:01:42,994 INFO L85 PathProgramCache]: Analyzing trace with hash 1412848271, now seen corresponding path program 1 times [2022-11-19 08:01:42,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:01:42,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858432667] [2022-11-19 08:01:42,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:01:42,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:01:43,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:01:43,717 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-19 08:01:43,717 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:01:43,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858432667] [2022-11-19 08:01:43,718 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858432667] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:01:43,718 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:01:43,718 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-19 08:01:43,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594234797] [2022-11-19 08:01:43,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:01:43,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-19 08:01:43,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:01:43,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-19 08:01:43,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-19 08:01:43,723 INFO L87 Difference]: Start difference. First operand 364 states and 576 transitions. Second operand has 8 states, 8 states have (on average 5.75) internal successors, (46), 8 states have internal predecessors, (46), 6 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) [2022-11-19 08:01:46,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:01:46,927 INFO L93 Difference]: Finished difference Result 1248 states and 2004 transitions. [2022-11-19 08:01:46,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-19 08:01:46,928 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.75) internal successors, (46), 8 states have internal predecessors, (46), 6 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) Word has length 77 [2022-11-19 08:01:46,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:01:46,946 INFO L225 Difference]: With dead ends: 1248 [2022-11-19 08:01:46,947 INFO L226 Difference]: Without dead ends: 900 [2022-11-19 08:01:46,960 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2022-11-19 08:01:46,962 INFO L413 NwaCegarLoop]: 397 mSDtfsCounter, 1949 mSDsluCounter, 1740 mSDsCounter, 0 mSdLazyCounter, 2967 mSolverCounterSat, 577 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2015 SdHoareTripleChecker+Valid, 2137 SdHoareTripleChecker+Invalid, 3544 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 577 IncrementalHoareTripleChecker+Valid, 2967 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-11-19 08:01:46,963 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2015 Valid, 2137 Invalid, 3544 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [577 Valid, 2967 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-11-19 08:01:46,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 900 states. [2022-11-19 08:01:47,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 900 to 842. [2022-11-19 08:01:47,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 842 states, 591 states have (on average 1.6125211505922166) internal successors, (953), 626 states have internal predecessors, (953), 201 states have call successors, (201), 47 states have call predecessors, (201), 49 states have return successors, (202), 193 states have call predecessors, (202), 196 states have call successors, (202) [2022-11-19 08:01:47,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 842 states to 842 states and 1356 transitions. [2022-11-19 08:01:47,080 INFO L78 Accepts]: Start accepts. Automaton has 842 states and 1356 transitions. Word has length 77 [2022-11-19 08:01:47,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:01:47,080 INFO L495 AbstractCegarLoop]: Abstraction has 842 states and 1356 transitions. [2022-11-19 08:01:47,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.75) internal successors, (46), 8 states have internal predecessors, (46), 6 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) [2022-11-19 08:01:47,081 INFO L276 IsEmpty]: Start isEmpty. Operand 842 states and 1356 transitions. [2022-11-19 08:01:47,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-11-19 08:01:47,084 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:01:47,084 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-19 08:01:47,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-19 08:01:47,085 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:01:47,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:01:47,085 INFO L85 PathProgramCache]: Analyzing trace with hash 2043519656, now seen corresponding path program 1 times [2022-11-19 08:01:47,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:01:47,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646698027] [2022-11-19 08:01:47,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:01:47,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:01:47,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:01:47,434 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-19 08:01:47,435 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:01:47,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646698027] [2022-11-19 08:01:47,436 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646698027] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:01:47,437 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:01:47,437 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-19 08:01:47,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960469536] [2022-11-19 08:01:47,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:01:47,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-19 08:01:47,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:01:47,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-19 08:01:47,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-19 08:01:47,442 INFO L87 Difference]: Start difference. First operand 842 states and 1356 transitions. Second operand has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 5 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2022-11-19 08:01:49,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:01:49,804 INFO L93 Difference]: Finished difference Result 1469 states and 2367 transitions. [2022-11-19 08:01:49,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-19 08:01:49,805 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 5 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) Word has length 78 [2022-11-19 08:01:49,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:01:49,811 INFO L225 Difference]: With dead ends: 1469 [2022-11-19 08:01:49,812 INFO L226 Difference]: Without dead ends: 967 [2022-11-19 08:01:49,814 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-11-19 08:01:49,815 INFO L413 NwaCegarLoop]: 374 mSDtfsCounter, 1135 mSDsluCounter, 1232 mSDsCounter, 0 mSdLazyCounter, 2445 mSolverCounterSat, 416 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1210 SdHoareTripleChecker+Valid, 1606 SdHoareTripleChecker+Invalid, 2861 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 416 IncrementalHoareTripleChecker+Valid, 2445 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:01:49,816 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1210 Valid, 1606 Invalid, 2861 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [416 Valid, 2445 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-11-19 08:01:49,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 967 states. [2022-11-19 08:01:49,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 967 to 858. [2022-11-19 08:01:49,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 858 states, 601 states have (on average 1.605657237936772) internal successors, (965), 639 states have internal predecessors, (965), 203 states have call successors, (203), 50 states have call predecessors, (203), 53 states have return successors, (210), 193 states have call predecessors, (210), 198 states have call successors, (210) [2022-11-19 08:01:49,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 858 states to 858 states and 1378 transitions. [2022-11-19 08:01:49,932 INFO L78 Accepts]: Start accepts. Automaton has 858 states and 1378 transitions. Word has length 78 [2022-11-19 08:01:49,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:01:49,933 INFO L495 AbstractCegarLoop]: Abstraction has 858 states and 1378 transitions. [2022-11-19 08:01:49,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 5 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2022-11-19 08:01:49,933 INFO L276 IsEmpty]: Start isEmpty. Operand 858 states and 1378 transitions. [2022-11-19 08:01:49,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-11-19 08:01:49,936 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:01:49,937 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-19 08:01:49,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-19 08:01:49,937 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:01:49,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:01:49,938 INFO L85 PathProgramCache]: Analyzing trace with hash -623604157, now seen corresponding path program 1 times [2022-11-19 08:01:49,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:01:49,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196355162] [2022-11-19 08:01:49,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:01:49,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:01:49,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:01:50,217 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-19 08:01:50,217 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:01:50,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196355162] [2022-11-19 08:01:50,217 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196355162] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:01:50,218 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:01:50,218 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-19 08:01:50,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453972139] [2022-11-19 08:01:50,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:01:50,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 08:01:50,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:01:50,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 08:01:50,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:01:50,219 INFO L87 Difference]: Start difference. First operand 858 states and 1378 transitions. Second operand has 6 states, 6 states have (on average 7.666666666666667) internal successors, (46), 6 states have internal predecessors, (46), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-19 08:01:51,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:01:51,060 INFO L93 Difference]: Finished difference Result 929 states and 1490 transitions. [2022-11-19 08:01:51,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 08:01:51,061 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.666666666666667) internal successors, (46), 6 states have internal predecessors, (46), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) Word has length 82 [2022-11-19 08:01:51,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:01:51,067 INFO L225 Difference]: With dead ends: 929 [2022-11-19 08:01:51,068 INFO L226 Difference]: Without dead ends: 914 [2022-11-19 08:01:51,069 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-11-19 08:01:51,081 INFO L413 NwaCegarLoop]: 543 mSDtfsCounter, 670 mSDsluCounter, 1257 mSDsCounter, 0 mSdLazyCounter, 517 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 671 SdHoareTripleChecker+Valid, 1800 SdHoareTripleChecker+Invalid, 539 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-19 08:01:51,081 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [671 Valid, 1800 Invalid, 539 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 517 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-19 08:01:51,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 914 states. [2022-11-19 08:01:51,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 914 to 862. [2022-11-19 08:01:51,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 862 states, 605 states have (on average 1.6016528925619835) internal successors, (969), 643 states have internal predecessors, (969), 203 states have call successors, (203), 50 states have call predecessors, (203), 53 states have return successors, (210), 193 states have call predecessors, (210), 198 states have call successors, (210) [2022-11-19 08:01:51,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 862 states to 862 states and 1382 transitions. [2022-11-19 08:01:51,163 INFO L78 Accepts]: Start accepts. Automaton has 862 states and 1382 transitions. Word has length 82 [2022-11-19 08:01:51,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:01:51,166 INFO L495 AbstractCegarLoop]: Abstraction has 862 states and 1382 transitions. [2022-11-19 08:01:51,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.666666666666667) internal successors, (46), 6 states have internal predecessors, (46), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-19 08:01:51,171 INFO L276 IsEmpty]: Start isEmpty. Operand 862 states and 1382 transitions. [2022-11-19 08:01:51,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-11-19 08:01:51,174 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:01:51,175 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-19 08:01:51,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-19 08:01:51,175 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:01:51,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:01:51,175 INFO L85 PathProgramCache]: Analyzing trace with hash 698247476, now seen corresponding path program 1 times [2022-11-19 08:01:51,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:01:51,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796159607] [2022-11-19 08:01:51,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:01:51,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:01:51,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:01:51,399 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-19 08:01:51,399 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:01:51,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796159607] [2022-11-19 08:01:51,399 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796159607] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:01:51,400 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:01:51,400 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 08:01:51,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397869651] [2022-11-19 08:01:51,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:01:51,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 08:01:51,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:01:51,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 08:01:51,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:01:51,402 INFO L87 Difference]: Start difference. First operand 862 states and 1382 transitions. Second operand has 5 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 3 states have call predecessors, (15), 1 states have call successors, (15) [2022-11-19 08:01:51,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:01:51,591 INFO L93 Difference]: Finished difference Result 881 states and 1406 transitions. [2022-11-19 08:01:51,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 08:01:51,591 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 3 states have call predecessors, (15), 1 states have call successors, (15) Word has length 87 [2022-11-19 08:01:51,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:01:51,598 INFO L225 Difference]: With dead ends: 881 [2022-11-19 08:01:51,598 INFO L226 Difference]: Without dead ends: 866 [2022-11-19 08:01:51,599 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:01:51,602 INFO L413 NwaCegarLoop]: 546 mSDtfsCounter, 30 mSDsluCounter, 1600 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 2146 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:01:51,603 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 2146 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:01:51,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 866 states. [2022-11-19 08:01:51,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 866 to 862. [2022-11-19 08:01:51,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 862 states, 605 states have (on average 1.5983471074380164) internal successors, (967), 643 states have internal predecessors, (967), 203 states have call successors, (203), 50 states have call predecessors, (203), 53 states have return successors, (210), 193 states have call predecessors, (210), 198 states have call successors, (210) [2022-11-19 08:01:51,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 862 states to 862 states and 1380 transitions. [2022-11-19 08:01:51,700 INFO L78 Accepts]: Start accepts. Automaton has 862 states and 1380 transitions. Word has length 87 [2022-11-19 08:01:51,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:01:51,701 INFO L495 AbstractCegarLoop]: Abstraction has 862 states and 1380 transitions. [2022-11-19 08:01:51,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 3 states have call predecessors, (15), 1 states have call successors, (15) [2022-11-19 08:01:51,701 INFO L276 IsEmpty]: Start isEmpty. Operand 862 states and 1380 transitions. [2022-11-19 08:01:51,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-11-19 08:01:51,704 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:01:51,704 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:01:51,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-19 08:01:51,704 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:01:51,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:01:51,705 INFO L85 PathProgramCache]: Analyzing trace with hash -1812553363, now seen corresponding path program 1 times [2022-11-19 08:01:51,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:01:51,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79987927] [2022-11-19 08:01:51,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:01:51,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:01:51,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:01:51,988 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-19 08:01:51,988 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:01:51,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79987927] [2022-11-19 08:01:51,989 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79987927] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:01:51,989 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:01:51,989 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 08:01:51,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961920942] [2022-11-19 08:01:51,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:01:51,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 08:01:51,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:01:51,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 08:01:51,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:01:51,991 INFO L87 Difference]: Start difference. First operand 862 states and 1380 transitions. Second operand has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-19 08:01:53,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:01:53,637 INFO L93 Difference]: Finished difference Result 2747 states and 4463 transitions. [2022-11-19 08:01:53,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 08:01:53,638 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 94 [2022-11-19 08:01:53,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:01:53,652 INFO L225 Difference]: With dead ends: 2747 [2022-11-19 08:01:53,652 INFO L226 Difference]: Without dead ends: 1901 [2022-11-19 08:01:53,657 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:01:53,658 INFO L413 NwaCegarLoop]: 318 mSDtfsCounter, 1148 mSDsluCounter, 388 mSDsCounter, 0 mSdLazyCounter, 921 mSolverCounterSat, 360 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1218 SdHoareTripleChecker+Valid, 706 SdHoareTripleChecker+Invalid, 1281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 360 IncrementalHoareTripleChecker+Valid, 921 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-19 08:01:53,659 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1218 Valid, 706 Invalid, 1281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [360 Valid, 921 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-19 08:01:53,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1901 states. [2022-11-19 08:01:53,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1901 to 1735. [2022-11-19 08:01:53,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1735 states, 1239 states have (on average 1.6069410815173526) internal successors, (1991), 1312 states have internal predecessors, (1991), 393 states have call successors, (393), 91 states have call predecessors, (393), 102 states have return successors, (423), 367 states have call predecessors, (423), 388 states have call successors, (423) [2022-11-19 08:01:53,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1735 states to 1735 states and 2807 transitions. [2022-11-19 08:01:53,794 INFO L78 Accepts]: Start accepts. Automaton has 1735 states and 2807 transitions. Word has length 94 [2022-11-19 08:01:53,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:01:53,795 INFO L495 AbstractCegarLoop]: Abstraction has 1735 states and 2807 transitions. [2022-11-19 08:01:53,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-19 08:01:53,796 INFO L276 IsEmpty]: Start isEmpty. Operand 1735 states and 2807 transitions. [2022-11-19 08:01:53,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-11-19 08:01:53,798 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:01:53,799 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:01:53,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-19 08:01:53,799 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:01:53,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:01:53,800 INFO L85 PathProgramCache]: Analyzing trace with hash -354714150, now seen corresponding path program 1 times [2022-11-19 08:01:53,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:01:53,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24181967] [2022-11-19 08:01:53,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:01:53,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:01:53,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:01:54,109 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-19 08:01:54,109 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:01:54,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24181967] [2022-11-19 08:01:54,110 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24181967] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:01:54,110 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:01:54,110 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 08:01:54,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390074806] [2022-11-19 08:01:54,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:01:54,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 08:01:54,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:01:54,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 08:01:54,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:01:54,113 INFO L87 Difference]: Start difference. First operand 1735 states and 2807 transitions. Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-19 08:01:55,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:01:55,868 INFO L93 Difference]: Finished difference Result 5298 states and 8687 transitions. [2022-11-19 08:01:55,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 08:01:55,871 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 95 [2022-11-19 08:01:55,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:01:55,896 INFO L225 Difference]: With dead ends: 5298 [2022-11-19 08:01:55,896 INFO L226 Difference]: Without dead ends: 3582 [2022-11-19 08:01:55,906 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:01:55,907 INFO L413 NwaCegarLoop]: 325 mSDtfsCounter, 1139 mSDsluCounter, 385 mSDsCounter, 0 mSdLazyCounter, 919 mSolverCounterSat, 359 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1208 SdHoareTripleChecker+Valid, 710 SdHoareTripleChecker+Invalid, 1278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 359 IncrementalHoareTripleChecker+Valid, 919 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-19 08:01:55,907 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1208 Valid, 710 Invalid, 1278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [359 Valid, 919 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-19 08:01:55,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3582 states. [2022-11-19 08:01:56,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3582 to 3369. [2022-11-19 08:01:56,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3369 states, 2429 states have (on average 1.6130094689172498) internal successors, (3918), 2579 states have internal predecessors, (3918), 736 states have call successors, (736), 173 states have call predecessors, (736), 203 states have return successors, (838), 678 states have call predecessors, (838), 731 states have call successors, (838) [2022-11-19 08:01:56,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3369 states to 3369 states and 5492 transitions. [2022-11-19 08:01:56,232 INFO L78 Accepts]: Start accepts. Automaton has 3369 states and 5492 transitions. Word has length 95 [2022-11-19 08:01:56,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:01:56,233 INFO L495 AbstractCegarLoop]: Abstraction has 3369 states and 5492 transitions. [2022-11-19 08:01:56,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-19 08:01:56,233 INFO L276 IsEmpty]: Start isEmpty. Operand 3369 states and 5492 transitions. [2022-11-19 08:01:56,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-11-19 08:01:56,236 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:01:56,236 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:01:56,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-19 08:01:56,237 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:01:56,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:01:56,237 INFO L85 PathProgramCache]: Analyzing trace with hash 1888632399, now seen corresponding path program 1 times [2022-11-19 08:01:56,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:01:56,238 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192010771] [2022-11-19 08:01:56,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:01:56,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:01:56,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:01:56,450 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-19 08:01:56,450 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:01:56,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192010771] [2022-11-19 08:01:56,450 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192010771] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:01:56,450 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:01:56,450 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 08:01:56,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431936872] [2022-11-19 08:01:56,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:01:56,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 08:01:56,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:01:56,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 08:01:56,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:01:56,452 INFO L87 Difference]: Start difference. First operand 3369 states and 5492 transitions. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-19 08:01:58,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:01:58,464 INFO L93 Difference]: Finished difference Result 10242 states and 17011 transitions. [2022-11-19 08:01:58,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 08:01:58,465 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 96 [2022-11-19 08:01:58,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:01:58,522 INFO L225 Difference]: With dead ends: 10242 [2022-11-19 08:01:58,522 INFO L226 Difference]: Without dead ends: 6898 [2022-11-19 08:01:58,541 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:01:58,542 INFO L413 NwaCegarLoop]: 341 mSDtfsCounter, 1122 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 916 mSolverCounterSat, 359 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1190 SdHoareTripleChecker+Valid, 723 SdHoareTripleChecker+Invalid, 1275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 359 IncrementalHoareTripleChecker+Valid, 916 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-19 08:01:58,542 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1190 Valid, 723 Invalid, 1275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [359 Valid, 916 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-19 08:01:58,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6898 states. [2022-11-19 08:01:59,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6898 to 6582. [2022-11-19 08:01:59,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6582 states, 4764 states have (on average 1.6133501259445844) internal successors, (7686), 5074 states have internal predecessors, (7686), 1406 states have call successors, (1406), 337 states have call predecessors, (1406), 411 states have return successors, (1744), 1284 states have call predecessors, (1744), 1401 states have call successors, (1744) [2022-11-19 08:01:59,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6582 states to 6582 states and 10836 transitions. [2022-11-19 08:01:59,257 INFO L78 Accepts]: Start accepts. Automaton has 6582 states and 10836 transitions. Word has length 96 [2022-11-19 08:01:59,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:01:59,258 INFO L495 AbstractCegarLoop]: Abstraction has 6582 states and 10836 transitions. [2022-11-19 08:01:59,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-19 08:01:59,258 INFO L276 IsEmpty]: Start isEmpty. Operand 6582 states and 10836 transitions. [2022-11-19 08:01:59,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-11-19 08:01:59,262 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:01:59,262 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:01:59,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-19 08:01:59,262 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:01:59,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:01:59,263 INFO L85 PathProgramCache]: Analyzing trace with hash -1582064708, now seen corresponding path program 1 times [2022-11-19 08:01:59,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:01:59,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298288363] [2022-11-19 08:01:59,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:01:59,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:01:59,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:01:59,460 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-19 08:01:59,460 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:01:59,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298288363] [2022-11-19 08:01:59,461 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298288363] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:01:59,461 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:01:59,461 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 08:01:59,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409604221] [2022-11-19 08:01:59,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:01:59,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 08:01:59,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:01:59,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 08:01:59,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:01:59,463 INFO L87 Difference]: Start difference. First operand 6582 states and 10836 transitions. Second operand has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-19 08:02:02,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:02:02,196 INFO L93 Difference]: Finished difference Result 19983 states and 33946 transitions. [2022-11-19 08:02:02,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 08:02:02,197 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 97 [2022-11-19 08:02:02,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:02:02,290 INFO L225 Difference]: With dead ends: 19983 [2022-11-19 08:02:02,290 INFO L226 Difference]: Without dead ends: 13438 [2022-11-19 08:02:02,327 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:02:02,328 INFO L413 NwaCegarLoop]: 353 mSDtfsCounter, 1109 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 913 mSolverCounterSat, 358 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1176 SdHoareTripleChecker+Valid, 735 SdHoareTripleChecker+Invalid, 1271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 358 IncrementalHoareTripleChecker+Valid, 913 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-19 08:02:02,328 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1176 Valid, 735 Invalid, 1271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [358 Valid, 913 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-19 08:02:02,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13438 states. [2022-11-19 08:02:03,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13438 to 12907. [2022-11-19 08:02:03,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12907 states, 9351 states have (on average 1.6107368195914875) internal successors, (15062), 9993 states have internal predecessors, (15062), 2716 states have call successors, (2716), 665 states have call predecessors, (2716), 839 states have return successors, (3854), 2466 states have call predecessors, (3854), 2711 states have call successors, (3854) [2022-11-19 08:02:03,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12907 states to 12907 states and 21632 transitions. [2022-11-19 08:02:03,716 INFO L78 Accepts]: Start accepts. Automaton has 12907 states and 21632 transitions. Word has length 97 [2022-11-19 08:02:03,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:02:03,717 INFO L495 AbstractCegarLoop]: Abstraction has 12907 states and 21632 transitions. [2022-11-19 08:02:03,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-19 08:02:03,718 INFO L276 IsEmpty]: Start isEmpty. Operand 12907 states and 21632 transitions. [2022-11-19 08:02:03,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-11-19 08:02:03,721 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:02:03,721 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:02:03,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-19 08:02:03,721 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:02:03,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:02:03,727 INFO L85 PathProgramCache]: Analyzing trace with hash -1799488719, now seen corresponding path program 1 times [2022-11-19 08:02:03,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:02:03,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678953258] [2022-11-19 08:02:03,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:02:03,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:02:03,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:02:03,958 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-19 08:02:03,959 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:02:03,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678953258] [2022-11-19 08:02:03,959 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678953258] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:02:03,959 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:02:03,960 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 08:02:03,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791739336] [2022-11-19 08:02:03,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:02:03,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 08:02:03,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:02:03,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 08:02:03,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:02:03,961 INFO L87 Difference]: Start difference. First operand 12907 states and 21632 transitions. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-19 08:02:07,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:02:07,761 INFO L93 Difference]: Finished difference Result 39256 states and 69522 transitions. [2022-11-19 08:02:07,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 08:02:07,762 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 98 [2022-11-19 08:02:07,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:02:07,937 INFO L225 Difference]: With dead ends: 39256 [2022-11-19 08:02:07,937 INFO L226 Difference]: Without dead ends: 26400 [2022-11-19 08:02:08,003 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:02:08,004 INFO L413 NwaCegarLoop]: 363 mSDtfsCounter, 1100 mSDsluCounter, 386 mSDsCounter, 0 mSdLazyCounter, 911 mSolverCounterSat, 355 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1166 SdHoareTripleChecker+Valid, 749 SdHoareTripleChecker+Invalid, 1266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 355 IncrementalHoareTripleChecker+Valid, 911 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-19 08:02:08,005 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1166 Valid, 749 Invalid, 1266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [355 Valid, 911 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-11-19 08:02:08,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26400 states. [2022-11-19 08:02:10,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26400 to 25328. [2022-11-19 08:02:10,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25328 states, 18381 states have (on average 1.609760078341766) internal successors, (29589), 19665 states have internal predecessors, (29589), 5276 states have call successors, (5276), 1319 states have call predecessors, (5276), 1670 states have return successors, (8905), 4769 states have call predecessors, (8905), 5271 states have call successors, (8905) [2022-11-19 08:02:10,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25328 states to 25328 states and 43770 transitions. [2022-11-19 08:02:10,937 INFO L78 Accepts]: Start accepts. Automaton has 25328 states and 43770 transitions. Word has length 98 [2022-11-19 08:02:10,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:02:10,940 INFO L495 AbstractCegarLoop]: Abstraction has 25328 states and 43770 transitions. [2022-11-19 08:02:10,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-19 08:02:10,940 INFO L276 IsEmpty]: Start isEmpty. Operand 25328 states and 43770 transitions. [2022-11-19 08:02:10,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-11-19 08:02:10,952 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:02:10,953 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 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] [2022-11-19 08:02:10,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-19 08:02:10,953 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:02:10,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:02:10,954 INFO L85 PathProgramCache]: Analyzing trace with hash 2030100833, now seen corresponding path program 1 times [2022-11-19 08:02:10,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:02:10,954 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692121329] [2022-11-19 08:02:10,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:02:10,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:02:11,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:02:11,206 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-11-19 08:02:11,206 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:02:11,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692121329] [2022-11-19 08:02:11,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692121329] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:02:11,206 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:02:11,207 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 08:02:11,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613271578] [2022-11-19 08:02:11,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:02:11,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 08:02:11,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:02:11,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 08:02:11,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:02:11,210 INFO L87 Difference]: Start difference. First operand 25328 states and 43770 transitions. Second operand has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 2 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2022-11-19 08:02:13,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:02:13,653 INFO L93 Difference]: Finished difference Result 54299 states and 97351 transitions. [2022-11-19 08:02:13,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 08:02:13,653 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 2 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) Word has length 142 [2022-11-19 08:02:13,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:02:13,867 INFO L225 Difference]: With dead ends: 54299 [2022-11-19 08:02:13,868 INFO L226 Difference]: Without dead ends: 28988 [2022-11-19 08:02:14,005 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:02:14,006 INFO L413 NwaCegarLoop]: 603 mSDtfsCounter, 123 mSDsluCounter, 1112 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 1715 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:02:14,007 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 1715 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:02:14,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28988 states. [2022-11-19 08:02:16,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28988 to 25568. [2022-11-19 08:02:16,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25568 states, 18604 states have (on average 1.6049774242098473) internal successors, (29859), 19872 states have internal predecessors, (29859), 5293 states have call successors, (5293), 1319 states have call predecessors, (5293), 1670 states have return successors, (8922), 4786 states have call predecessors, (8922), 5288 states have call successors, (8922) [2022-11-19 08:02:16,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25568 states to 25568 states and 44074 transitions. [2022-11-19 08:02:16,739 INFO L78 Accepts]: Start accepts. Automaton has 25568 states and 44074 transitions. Word has length 142 [2022-11-19 08:02:16,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:02:16,742 INFO L495 AbstractCegarLoop]: Abstraction has 25568 states and 44074 transitions. [2022-11-19 08:02:16,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 2 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2022-11-19 08:02:16,743 INFO L276 IsEmpty]: Start isEmpty. Operand 25568 states and 44074 transitions. [2022-11-19 08:02:16,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-11-19 08:02:16,752 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:02:16,753 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:02:16,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-19 08:02:16,753 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:02:16,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:02:16,754 INFO L85 PathProgramCache]: Analyzing trace with hash 202313354, now seen corresponding path program 1 times [2022-11-19 08:02:16,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:02:16,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473624754] [2022-11-19 08:02:16,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:02:16,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:02:16,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:02:16,939 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-11-19 08:02:16,940 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:02:16,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473624754] [2022-11-19 08:02:16,940 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473624754] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:02:16,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702405953] [2022-11-19 08:02:16,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:02:16,941 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:02:16,941 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e201ea-3656-4950-b3bb-98e429bdc35f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:02:16,947 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e201ea-3656-4950-b3bb-98e429bdc35f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:02:16,979 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e201ea-3656-4950-b3bb-98e429bdc35f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-19 08:02:17,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:02:17,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 1820 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 08:02:17,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:02:17,689 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-19 08:02:17,689 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:02:17,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [702405953] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:02:17,690 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 08:02:17,690 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-11-19 08:02:17,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262585619] [2022-11-19 08:02:17,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:02:17,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 08:02:17,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:02:17,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 08:02:17,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:02:17,692 INFO L87 Difference]: Start difference. First operand 25568 states and 44074 transitions. Second operand has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2022-11-19 08:02:20,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:02:20,506 INFO L93 Difference]: Finished difference Result 53615 states and 95734 transitions. [2022-11-19 08:02:20,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 08:02:20,507 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), 2 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) Word has length 145 [2022-11-19 08:02:20,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:02:20,644 INFO L225 Difference]: With dead ends: 53615 [2022-11-19 08:02:20,645 INFO L226 Difference]: Without dead ends: 28064 [2022-11-19 08:02:20,744 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-19 08:02:20,745 INFO L413 NwaCegarLoop]: 477 mSDtfsCounter, 213 mSDsluCounter, 930 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 1407 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 08:02:20,745 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 1407 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 08:02:20,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28064 states. [2022-11-19 08:02:23,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28064 to 28064. [2022-11-19 08:02:23,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28064 states, 21036 states have (on average 1.6415193002471953) internal successors, (34531), 22304 states have internal predecessors, (34531), 5293 states have call successors, (5293), 1383 states have call predecessors, (5293), 1734 states have return successors, (8922), 4786 states have call predecessors, (8922), 5288 states have call successors, (8922) [2022-11-19 08:02:23,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28064 states to 28064 states and 48746 transitions. [2022-11-19 08:02:23,199 INFO L78 Accepts]: Start accepts. Automaton has 28064 states and 48746 transitions. Word has length 145 [2022-11-19 08:02:23,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:02:23,200 INFO L495 AbstractCegarLoop]: Abstraction has 28064 states and 48746 transitions. [2022-11-19 08:02:23,200 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), 2 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2022-11-19 08:02:23,200 INFO L276 IsEmpty]: Start isEmpty. Operand 28064 states and 48746 transitions. [2022-11-19 08:02:23,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2022-11-19 08:02:23,212 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:02:23,212 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:02:23,228 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e201ea-3656-4950-b3bb-98e429bdc35f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-19 08:02:23,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e201ea-3656-4950-b3bb-98e429bdc35f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-19 08:02:23,421 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:02:23,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:02:23,422 INFO L85 PathProgramCache]: Analyzing trace with hash 607829302, now seen corresponding path program 1 times [2022-11-19 08:02:23,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:02:23,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282707871] [2022-11-19 08:02:23,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:02:23,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:02:23,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:02:23,605 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-11-19 08:02:23,605 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:02:23,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282707871] [2022-11-19 08:02:23,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282707871] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:02:23,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [355911545] [2022-11-19 08:02:23,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:02:23,606 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:02:23,606 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e201ea-3656-4950-b3bb-98e429bdc35f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:02:23,608 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e201ea-3656-4950-b3bb-98e429bdc35f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:02:23,637 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e201ea-3656-4950-b3bb-98e429bdc35f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-19 08:02:24,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:02:24,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 1825 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 08:02:24,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:02:24,078 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-11-19 08:02:24,079 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:02:24,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [355911545] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:02:24,079 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 08:02:24,079 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-11-19 08:02:24,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32280177] [2022-11-19 08:02:24,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:02:24,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 08:02:24,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:02:24,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 08:02:24,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:02:24,081 INFO L87 Difference]: Start difference. First operand 28064 states and 48746 transitions. Second operand has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 2 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2022-11-19 08:02:26,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:02:26,712 INFO L93 Difference]: Finished difference Result 58607 states and 105012 transitions. [2022-11-19 08:02:26,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 08:02:26,712 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 2 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) Word has length 150 [2022-11-19 08:02:26,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:02:26,866 INFO L225 Difference]: With dead ends: 58607 [2022-11-19 08:02:26,866 INFO L226 Difference]: Without dead ends: 30560 [2022-11-19 08:02:27,078 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-19 08:02:27,078 INFO L413 NwaCegarLoop]: 477 mSDtfsCounter, 211 mSDsluCounter, 930 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 1407 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 08:02:27,079 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [211 Valid, 1407 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 08:02:27,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30560 states. [2022-11-19 08:02:28,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30560 to 30560. [2022-11-19 08:02:28,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30560 states, 23468 states have (on average 1.67048747230271) internal successors, (39203), 24736 states have internal predecessors, (39203), 5293 states have call successors, (5293), 1447 states have call predecessors, (5293), 1798 states have return successors, (8922), 4786 states have call predecessors, (8922), 5288 states have call successors, (8922) [2022-11-19 08:02:29,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30560 states to 30560 states and 53418 transitions. [2022-11-19 08:02:29,006 INFO L78 Accepts]: Start accepts. Automaton has 30560 states and 53418 transitions. Word has length 150 [2022-11-19 08:02:29,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:02:29,007 INFO L495 AbstractCegarLoop]: Abstraction has 30560 states and 53418 transitions. [2022-11-19 08:02:29,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 2 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2022-11-19 08:02:29,007 INFO L276 IsEmpty]: Start isEmpty. Operand 30560 states and 53418 transitions. [2022-11-19 08:02:29,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2022-11-19 08:02:29,017 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:02:29,017 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:02:29,032 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e201ea-3656-4950-b3bb-98e429bdc35f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-19 08:02:29,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e201ea-3656-4950-b3bb-98e429bdc35f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-19 08:02:29,226 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:02:29,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:02:29,227 INFO L85 PathProgramCache]: Analyzing trace with hash -916472458, now seen corresponding path program 1 times [2022-11-19 08:02:29,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:02:29,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349529565] [2022-11-19 08:02:29,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:02:29,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:02:29,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:02:29,407 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-11-19 08:02:29,408 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:02:29,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349529565] [2022-11-19 08:02:29,408 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349529565] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:02:29,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047250585] [2022-11-19 08:02:29,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:02:29,409 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:02:29,409 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e201ea-3656-4950-b3bb-98e429bdc35f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:02:29,410 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e201ea-3656-4950-b3bb-98e429bdc35f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:02:29,438 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e201ea-3656-4950-b3bb-98e429bdc35f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-19 08:02:29,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:02:29,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 1829 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 08:02:29,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:02:29,907 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 69 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-19 08:02:29,908 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:02:29,908 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2047250585] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:02:29,908 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 08:02:29,908 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-11-19 08:02:29,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392200160] [2022-11-19 08:02:29,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:02:29,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 08:02:29,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:02:29,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 08:02:29,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:02:29,915 INFO L87 Difference]: Start difference. First operand 30560 states and 53418 transitions. Second operand has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 2 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2022-11-19 08:02:32,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:02:32,608 INFO L93 Difference]: Finished difference Result 63599 states and 114290 transitions. [2022-11-19 08:02:32,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 08:02:32,609 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 2 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) Word has length 154 [2022-11-19 08:02:32,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:02:32,718 INFO L225 Difference]: With dead ends: 63599 [2022-11-19 08:02:32,718 INFO L226 Difference]: Without dead ends: 33056 [2022-11-19 08:02:32,780 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-19 08:02:32,781 INFO L413 NwaCegarLoop]: 477 mSDtfsCounter, 209 mSDsluCounter, 930 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 1407 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:02:32,781 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [209 Valid, 1407 Invalid, 246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 08:02:32,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33056 states. [2022-11-19 08:02:35,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33056 to 33056. [2022-11-19 08:02:35,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33056 states, 25900 states have (on average 1.694015444015444) internal successors, (43875), 27168 states have internal predecessors, (43875), 5293 states have call successors, (5293), 1511 states have call predecessors, (5293), 1862 states have return successors, (8922), 4786 states have call predecessors, (8922), 5288 states have call successors, (8922) [2022-11-19 08:02:35,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33056 states to 33056 states and 58090 transitions. [2022-11-19 08:02:35,351 INFO L78 Accepts]: Start accepts. Automaton has 33056 states and 58090 transitions. Word has length 154 [2022-11-19 08:02:35,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:02:35,351 INFO L495 AbstractCegarLoop]: Abstraction has 33056 states and 58090 transitions. [2022-11-19 08:02:35,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 2 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2022-11-19 08:02:35,351 INFO L276 IsEmpty]: Start isEmpty. Operand 33056 states and 58090 transitions. [2022-11-19 08:02:35,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-11-19 08:02:35,364 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:02:35,364 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:02:35,373 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e201ea-3656-4950-b3bb-98e429bdc35f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-19 08:02:35,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e201ea-3656-4950-b3bb-98e429bdc35f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-19 08:02:35,573 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:02:35,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:02:35,573 INFO L85 PathProgramCache]: Analyzing trace with hash -759326038, now seen corresponding path program 1 times [2022-11-19 08:02:35,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:02:35,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724989104] [2022-11-19 08:02:35,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:02:35,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:02:35,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:02:38,358 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 2 proven. 40 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-11-19 08:02:38,359 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:02:38,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724989104] [2022-11-19 08:02:38,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724989104] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:02:38,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183879281] [2022-11-19 08:02:38,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:02:38,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:02:38,360 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e201ea-3656-4950-b3bb-98e429bdc35f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:02:38,363 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e201ea-3656-4950-b3bb-98e429bdc35f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:02:38,365 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e201ea-3656-4950-b3bb-98e429bdc35f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-19 08:02:38,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:02:38,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 1832 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 08:02:38,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:02:38,863 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-19 08:02:38,863 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:02:38,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1183879281] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:02:38,863 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 08:02:38,863 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [26] total 28 [2022-11-19 08:02:38,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686882863] [2022-11-19 08:02:38,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:02:38,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 08:02:38,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:02:38,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 08:02:38,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=667, Unknown=0, NotChecked=0, Total=756 [2022-11-19 08:02:38,866 INFO L87 Difference]: Start difference. First operand 33056 states and 58090 transitions. Second operand has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 2 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2022-11-19 08:02:40,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:02:40,651 INFO L93 Difference]: Finished difference Result 68591 states and 123568 transitions. [2022-11-19 08:02:40,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 08:02:40,652 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 2 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) Word has length 157 [2022-11-19 08:02:40,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:02:40,768 INFO L225 Difference]: With dead ends: 68591 [2022-11-19 08:02:40,768 INFO L226 Difference]: Without dead ends: 35552 [2022-11-19 08:02:40,835 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=93, Invalid=719, Unknown=0, NotChecked=0, Total=812 [2022-11-19 08:02:40,835 INFO L413 NwaCegarLoop]: 477 mSDtfsCounter, 207 mSDsluCounter, 930 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 1407 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:02:40,836 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [207 Valid, 1407 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 08:02:40,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35552 states.