./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec3_product25.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e7fbc69 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4157ced1-4e63-4335-a64f-3f9b21ee947a/bin/utaipan-Q6hlc19bkW/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4157ced1-4e63-4335-a64f-3f9b21ee947a/bin/utaipan-Q6hlc19bkW/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4157ced1-4e63-4335-a64f-3f9b21ee947a/bin/utaipan-Q6hlc19bkW/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4157ced1-4e63-4335-a64f-3f9b21ee947a/bin/utaipan-Q6hlc19bkW/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec3_product25.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4157ced1-4e63-4335-a64f-3f9b21ee947a/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4157ced1-4e63-4335-a64f-3f9b21ee947a/bin/utaipan-Q6hlc19bkW --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 7dffe766d259411d55a5393012f150d80e63eb09c0b69cb40e513f715e96f78e --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-4e7fbc6 [2022-11-23 15:24:43,821 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 15:24:43,824 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 15:24:43,849 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 15:24:43,850 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 15:24:43,851 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 15:24:43,868 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 15:24:43,874 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 15:24:43,876 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 15:24:43,878 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 15:24:43,880 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 15:24:43,882 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 15:24:43,883 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 15:24:43,887 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 15:24:43,889 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 15:24:43,892 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 15:24:43,895 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 15:24:43,901 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 15:24:43,903 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 15:24:43,906 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 15:24:43,911 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 15:24:43,913 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 15:24:43,915 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 15:24:43,918 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 15:24:43,922 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 15:24:43,924 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 15:24:43,925 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 15:24:43,927 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 15:24:43,927 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 15:24:43,931 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 15:24:43,931 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 15:24:43,932 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 15:24:43,935 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 15:24:43,937 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 15:24:43,940 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 15:24:43,940 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 15:24:43,941 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 15:24:43,941 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 15:24:43,942 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 15:24:43,943 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 15:24:43,944 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 15:24:43,945 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4157ced1-4e63-4335-a64f-3f9b21ee947a/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-23 15:24:43,998 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 15:24:43,999 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 15:24:44,000 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 15:24:44,001 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 15:24:44,002 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 15:24:44,003 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 15:24:44,003 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-23 15:24:44,003 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-23 15:24:44,003 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-23 15:24:44,004 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-23 15:24:44,005 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-23 15:24:44,005 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-23 15:24:44,006 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-23 15:24:44,006 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-23 15:24:44,006 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-23 15:24:44,007 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-23 15:24:44,007 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-23 15:24:44,007 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-23 15:24:44,008 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 15:24:44,008 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 15:24:44,009 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 15:24:44,009 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 15:24:44,009 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 15:24:44,009 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-23 15:24:44,010 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 15:24:44,010 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-23 15:24:44,010 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 15:24:44,010 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-23 15:24:44,011 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 15:24:44,011 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-23 15:24:44,011 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 15:24:44,012 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 15:24:44,012 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 15:24:44,012 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 15:24:44,013 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-23 15:24:44,013 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 15:24:44,013 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-23 15:24:44,013 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-23 15:24:44,014 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 15:24:44,014 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-23 15:24:44,014 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-23 15:24:44,014 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_4157ced1-4e63-4335-a64f-3f9b21ee947a/bin/utaipan-Q6hlc19bkW/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4157ced1-4e63-4335-a64f-3f9b21ee947a/bin/utaipan-Q6hlc19bkW Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7dffe766d259411d55a5393012f150d80e63eb09c0b69cb40e513f715e96f78e [2022-11-23 15:24:44,419 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 15:24:44,467 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 15:24:44,471 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 15:24:44,472 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 15:24:44,473 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 15:24:44,475 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4157ced1-4e63-4335-a64f-3f9b21ee947a/bin/utaipan-Q6hlc19bkW/../../sv-benchmarks/c/product-lines/elevator_spec3_product25.cil.c [2022-11-23 15:24:48,151 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 15:24:48,593 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 15:24:48,594 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4157ced1-4e63-4335-a64f-3f9b21ee947a/sv-benchmarks/c/product-lines/elevator_spec3_product25.cil.c [2022-11-23 15:24:48,624 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4157ced1-4e63-4335-a64f-3f9b21ee947a/bin/utaipan-Q6hlc19bkW/data/e0d9e3873/bc35a05be9a146acbe4e7b9e56284a76/FLAG473a07bb2 [2022-11-23 15:24:48,640 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4157ced1-4e63-4335-a64f-3f9b21ee947a/bin/utaipan-Q6hlc19bkW/data/e0d9e3873/bc35a05be9a146acbe4e7b9e56284a76 [2022-11-23 15:24:48,644 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 15:24:48,645 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 15:24:48,647 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 15:24:48,648 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 15:24:48,652 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 15:24:48,653 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:24:48" (1/1) ... [2022-11-23 15:24:48,654 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@16321b84 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:24:48, skipping insertion in model container [2022-11-23 15:24:48,655 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:24:48" (1/1) ... [2022-11-23 15:24:48,664 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 15:24:48,733 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 15:24:49,170 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4157ced1-4e63-4335-a64f-3f9b21ee947a/sv-benchmarks/c/product-lines/elevator_spec3_product25.cil.c[27637,27650] [2022-11-23 15:24:49,332 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 15:24:49,345 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 15:24:49,454 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4157ced1-4e63-4335-a64f-3f9b21ee947a/sv-benchmarks/c/product-lines/elevator_spec3_product25.cil.c[27637,27650] [2022-11-23 15:24:49,567 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 15:24:49,596 INFO L208 MainTranslator]: Completed translation [2022-11-23 15:24:49,597 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:24:49 WrapperNode [2022-11-23 15:24:49,597 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 15:24:49,598 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 15:24:49,599 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 15:24:49,599 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 15:24:49,608 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:24:49" (1/1) ... [2022-11-23 15:24:49,642 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:24:49" (1/1) ... [2022-11-23 15:24:49,692 INFO L138 Inliner]: procedures = 89, calls = 340, calls flagged for inlining = 25, calls inlined = 22, statements flattened = 842 [2022-11-23 15:24:49,692 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 15:24:49,693 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 15:24:49,693 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 15:24:49,694 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 15:24:49,708 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:24:49" (1/1) ... [2022-11-23 15:24:49,709 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:24:49" (1/1) ... [2022-11-23 15:24:49,714 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:24:49" (1/1) ... [2022-11-23 15:24:49,714 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:24:49" (1/1) ... [2022-11-23 15:24:49,759 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:24:49" (1/1) ... [2022-11-23 15:24:49,771 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:24:49" (1/1) ... [2022-11-23 15:24:49,791 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:24:49" (1/1) ... [2022-11-23 15:24:49,796 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:24:49" (1/1) ... [2022-11-23 15:24:49,803 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 15:24:49,804 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 15:24:49,804 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 15:24:49,804 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 15:24:49,805 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:24:49" (1/1) ... [2022-11-23 15:24:49,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 15:24:49,843 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4157ced1-4e63-4335-a64f-3f9b21ee947a/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:24:49,860 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4157ced1-4e63-4335-a64f-3f9b21ee947a/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 15:24:49,872 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4157ced1-4e63-4335-a64f-3f9b21ee947a/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 15:24:49,917 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 15:24:49,917 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2022-11-23 15:24:49,917 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2022-11-23 15:24:49,917 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2022-11-23 15:24:49,918 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2022-11-23 15:24:49,918 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2022-11-23 15:24:49,918 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2022-11-23 15:24:49,918 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2022-11-23 15:24:49,918 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2022-11-23 15:24:49,919 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2022-11-23 15:24:49,919 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2022-11-23 15:24:49,919 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2022-11-23 15:24:49,919 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2022-11-23 15:24:49,919 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2022-11-23 15:24:49,919 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2022-11-23 15:24:49,920 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2022-11-23 15:24:49,920 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2022-11-23 15:24:49,920 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2022-11-23 15:24:49,920 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2022-11-23 15:24:49,920 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2022-11-23 15:24:49,921 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2022-11-23 15:24:49,921 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2022-11-23 15:24:49,922 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2022-11-23 15:24:49,922 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2022-11-23 15:24:49,922 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2022-11-23 15:24:49,923 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2022-11-23 15:24:49,923 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2022-11-23 15:24:49,924 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2022-11-23 15:24:49,924 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2022-11-23 15:24:49,924 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2022-11-23 15:24:49,924 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2022-11-23 15:24:49,924 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2022-11-23 15:24:49,925 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2022-11-23 15:24:49,925 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2022-11-23 15:24:49,925 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2022-11-23 15:24:49,925 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2022-11-23 15:24:49,925 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2022-11-23 15:24:49,926 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2022-11-23 15:24:49,926 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2022-11-23 15:24:49,926 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-23 15:24:49,926 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2022-11-23 15:24:49,926 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2022-11-23 15:24:49,927 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2022-11-23 15:24:49,927 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2022-11-23 15:24:49,927 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2022-11-23 15:24:49,927 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2022-11-23 15:24:49,928 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2022-11-23 15:24:49,928 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2022-11-23 15:24:49,928 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 15:24:49,928 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 15:24:49,929 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2022-11-23 15:24:49,929 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2022-11-23 15:24:50,145 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 15:24:50,148 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 15:24:51,753 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 15:24:52,877 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 15:24:52,878 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-23 15:24:52,883 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:24:52 BoogieIcfgContainer [2022-11-23 15:24:52,883 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 15:24:52,887 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 15:24:52,887 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 15:24:52,891 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 15:24:52,891 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 03:24:48" (1/3) ... [2022-11-23 15:24:52,894 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3927efe9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:24:52, skipping insertion in model container [2022-11-23 15:24:52,894 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:24:49" (2/3) ... [2022-11-23 15:24:52,895 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3927efe9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:24:52, skipping insertion in model container [2022-11-23 15:24:52,896 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:24:52" (3/3) ... [2022-11-23 15:24:52,901 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec3_product25.cil.c [2022-11-23 15:24:52,923 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 15:24:52,923 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-23 15:24:53,016 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 15:24:53,028 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;@137fba74, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 15:24:53,029 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-23 15:24:53,039 INFO L276 IsEmpty]: Start isEmpty. Operand has 383 states, 257 states have (on average 1.5914396887159532) internal successors, (409), 275 states have internal predecessors, (409), 100 states have call successors, (100), 24 states have call predecessors, (100), 24 states have return successors, (100), 97 states have call predecessors, (100), 100 states have call successors, (100) [2022-11-23 15:24:53,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-11-23 15:24:53,069 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:24:53,070 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:24:53,071 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:24:53,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:24:53,077 INFO L85 PathProgramCache]: Analyzing trace with hash 1886251950, now seen corresponding path program 1 times [2022-11-23 15:24:53,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:24:53,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177816288] [2022-11-23 15:24:53,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:24:53,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:24:53,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:24:54,239 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 15:24:54,240 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:24:54,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177816288] [2022-11-23 15:24:54,242 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177816288] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:24:54,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845709245] [2022-11-23 15:24:54,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:24:54,244 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:24:54,244 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4157ced1-4e63-4335-a64f-3f9b21ee947a/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:24:54,249 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4157ced1-4e63-4335-a64f-3f9b21ee947a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:24:54,291 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4157ced1-4e63-4335-a64f-3f9b21ee947a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-23 15:24:54,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:24:54,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 1524 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-23 15:24:54,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:24:54,972 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:24:54,972 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:24:54,973 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [845709245] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:24:54,973 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 15:24:54,974 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-23 15:24:54,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167922453] [2022-11-23 15:24:54,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:24:54,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:24:54,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:24:55,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:24:55,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-23 15:24:55,043 INFO L87 Difference]: Start difference. First operand has 383 states, 257 states have (on average 1.5914396887159532) internal successors, (409), 275 states have internal predecessors, (409), 100 states have call successors, (100), 24 states have call predecessors, (100), 24 states have return successors, (100), 97 states have call predecessors, (100), 100 states have call successors, (100) Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 3 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-23 15:24:55,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:24:55,621 INFO L93 Difference]: Finished difference Result 1074 states and 1734 transitions. [2022-11-23 15:24:55,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:24:55,625 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 3 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 64 [2022-11-23 15:24:55,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:24:55,660 INFO L225 Difference]: With dead ends: 1074 [2022-11-23 15:24:55,660 INFO L226 Difference]: Without dead ends: 693 [2022-11-23 15:24:55,680 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-23 15:24:55,685 INFO L413 NwaCegarLoop]: 995 mSDtfsCounter, 494 mSDsluCounter, 554 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 494 SdHoareTripleChecker+Valid, 1549 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-23 15:24:55,686 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [494 Valid, 1549 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-23 15:24:55,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 693 states. [2022-11-23 15:24:55,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 693 to 681. [2022-11-23 15:24:55,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 681 states, 462 states have (on average 1.5844155844155845) internal successors, (732), 493 states have internal predecessors, (732), 176 states have call successors, (176), 43 states have call predecessors, (176), 42 states have return successors, (178), 170 states have call predecessors, (178), 173 states have call successors, (178) [2022-11-23 15:24:55,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 681 states to 681 states and 1086 transitions. [2022-11-23 15:24:55,854 INFO L78 Accepts]: Start accepts. Automaton has 681 states and 1086 transitions. Word has length 64 [2022-11-23 15:24:55,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:24:55,855 INFO L495 AbstractCegarLoop]: Abstraction has 681 states and 1086 transitions. [2022-11-23 15:24:55,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 3 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-23 15:24:55,855 INFO L276 IsEmpty]: Start isEmpty. Operand 681 states and 1086 transitions. [2022-11-23 15:24:55,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-23 15:24:55,862 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:24:55,863 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:24:55,877 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4157ced1-4e63-4335-a64f-3f9b21ee947a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-23 15:24:56,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4157ced1-4e63-4335-a64f-3f9b21ee947a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:24:56,075 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:24:56,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:24:56,077 INFO L85 PathProgramCache]: Analyzing trace with hash -932086722, now seen corresponding path program 1 times [2022-11-23 15:24:56,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:24:56,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666211349] [2022-11-23 15:24:56,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:24:56,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:24:56,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:24:56,810 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 15:24:56,810 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:24:56,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666211349] [2022-11-23 15:24:56,816 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666211349] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:24:56,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850850197] [2022-11-23 15:24:56,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:24:56,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:24:56,817 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4157ced1-4e63-4335-a64f-3f9b21ee947a/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:24:56,822 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4157ced1-4e63-4335-a64f-3f9b21ee947a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:24:56,860 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4157ced1-4e63-4335-a64f-3f9b21ee947a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-23 15:24:57,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:24:57,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 1512 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-23 15:24:57,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:24:57,409 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:24:57,409 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:24:57,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [850850197] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:24:57,410 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 15:24:57,410 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-23 15:24:57,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111065339] [2022-11-23 15:24:57,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:24:57,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:24:57,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:24:57,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:24:57,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-23 15:24:57,414 INFO L87 Difference]: Start difference. First operand 681 states and 1086 transitions. Second operand has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-23 15:24:57,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:24:57,748 INFO L93 Difference]: Finished difference Result 1666 states and 2688 transitions. [2022-11-23 15:24:57,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:24:57,749 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 63 [2022-11-23 15:24:57,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:24:57,763 INFO L225 Difference]: With dead ends: 1666 [2022-11-23 15:24:57,763 INFO L226 Difference]: Without dead ends: 997 [2022-11-23 15:24:57,768 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-23 15:24:57,770 INFO L413 NwaCegarLoop]: 639 mSDtfsCounter, 550 mSDsluCounter, 476 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 550 SdHoareTripleChecker+Valid, 1115 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 15:24:57,770 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [550 Valid, 1115 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 15:24:57,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 997 states. [2022-11-23 15:24:57,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 997 to 973. [2022-11-23 15:24:57,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 973 states, 664 states have (on average 1.5933734939759037) internal successors, (1058), 710 states have internal predecessors, (1058), 249 states have call successors, (249), 59 states have call predecessors, (249), 59 states have return successors, (256), 242 states have call predecessors, (256), 246 states have call successors, (256) [2022-11-23 15:24:57,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 973 states to 973 states and 1563 transitions. [2022-11-23 15:24:57,855 INFO L78 Accepts]: Start accepts. Automaton has 973 states and 1563 transitions. Word has length 63 [2022-11-23 15:24:57,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:24:57,856 INFO L495 AbstractCegarLoop]: Abstraction has 973 states and 1563 transitions. [2022-11-23 15:24:57,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-23 15:24:57,856 INFO L276 IsEmpty]: Start isEmpty. Operand 973 states and 1563 transitions. [2022-11-23 15:24:57,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-11-23 15:24:57,862 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:24:57,862 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:24:57,879 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4157ced1-4e63-4335-a64f-3f9b21ee947a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-23 15:24:58,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4157ced1-4e63-4335-a64f-3f9b21ee947a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:24:58,073 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:24:58,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:24:58,075 INFO L85 PathProgramCache]: Analyzing trace with hash -950509246, now seen corresponding path program 1 times [2022-11-23 15:24:58,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:24:58,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520583878] [2022-11-23 15:24:58,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:24:58,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:24:58,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:24:58,371 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 15:24:58,372 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:24:58,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520583878] [2022-11-23 15:24:58,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520583878] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:24:58,373 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:24:58,373 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 15:24:58,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314748424] [2022-11-23 15:24:58,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:24:58,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 15:24:58,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:24:58,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 15:24:58,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 15:24:58,376 INFO L87 Difference]: Start difference. First operand 973 states and 1563 transitions. Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-11-23 15:24:58,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:24:58,904 INFO L93 Difference]: Finished difference Result 2206 states and 3603 transitions. [2022-11-23 15:24:58,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 15:24:58,905 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 64 [2022-11-23 15:24:58,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:24:58,919 INFO L225 Difference]: With dead ends: 2206 [2022-11-23 15:24:58,919 INFO L226 Difference]: Without dead ends: 1245 [2022-11-23 15:24:58,928 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 [2022-11-23 15:24:58,932 INFO L413 NwaCegarLoop]: 624 mSDtfsCounter, 139 mSDsluCounter, 1135 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 1759 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-23 15:24:58,934 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 1759 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-23 15:24:58,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1245 states. [2022-11-23 15:24:59,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1245 to 979. [2022-11-23 15:24:59,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 979 states, 670 states have (on average 1.5880597014925373) internal successors, (1064), 716 states have internal predecessors, (1064), 249 states have call successors, (249), 59 states have call predecessors, (249), 59 states have return successors, (256), 242 states have call predecessors, (256), 246 states have call successors, (256) [2022-11-23 15:24:59,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 979 states to 979 states and 1569 transitions. [2022-11-23 15:24:59,031 INFO L78 Accepts]: Start accepts. Automaton has 979 states and 1569 transitions. Word has length 64 [2022-11-23 15:24:59,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:24:59,031 INFO L495 AbstractCegarLoop]: Abstraction has 979 states and 1569 transitions. [2022-11-23 15:24:59,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-11-23 15:24:59,032 INFO L276 IsEmpty]: Start isEmpty. Operand 979 states and 1569 transitions. [2022-11-23 15:24:59,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-23 15:24:59,037 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:24:59,037 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:24:59,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-23 15:24:59,037 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:24:59,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:24:59,038 INFO L85 PathProgramCache]: Analyzing trace with hash 1863073862, now seen corresponding path program 1 times [2022-11-23 15:24:59,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:24:59,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733096907] [2022-11-23 15:24:59,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:24:59,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:24:59,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:24:59,579 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 15:24:59,582 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:24:59,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733096907] [2022-11-23 15:24:59,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733096907] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:24:59,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268837029] [2022-11-23 15:24:59,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:24:59,590 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:24:59,591 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4157ced1-4e63-4335-a64f-3f9b21ee947a/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:24:59,594 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4157ced1-4e63-4335-a64f-3f9b21ee947a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:24:59,613 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4157ced1-4e63-4335-a64f-3f9b21ee947a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-23 15:25:00,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:25:00,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 1534 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-23 15:25:00,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:25:00,269 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 15:25:00,269 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:25:00,269 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1268837029] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:25:00,270 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 15:25:00,270 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-23 15:25:00,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645222968] [2022-11-23 15:25:00,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:25:00,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:25:00,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:25:00,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:25:00,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-23 15:25:00,274 INFO L87 Difference]: Start difference. First operand 979 states and 1569 transitions. Second operand has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 3 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 3 states have call successors, (12) [2022-11-23 15:25:00,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:25:00,780 INFO L93 Difference]: Finished difference Result 2796 states and 4528 transitions. [2022-11-23 15:25:00,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:25:00,781 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 3 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 3 states have call successors, (12) Word has length 68 [2022-11-23 15:25:00,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:25:00,796 INFO L225 Difference]: With dead ends: 2796 [2022-11-23 15:25:00,796 INFO L226 Difference]: Without dead ends: 1829 [2022-11-23 15:25:00,806 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-23 15:25:00,809 INFO L413 NwaCegarLoop]: 683 mSDtfsCounter, 478 mSDsluCounter, 490 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 478 SdHoareTripleChecker+Valid, 1173 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-23 15:25:00,811 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [478 Valid, 1173 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-23 15:25:00,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1829 states. [2022-11-23 15:25:00,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1829 to 1807. [2022-11-23 15:25:00,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1807 states, 1228 states have (on average 1.5390879478827362) internal successors, (1890), 1318 states have internal predecessors, (1890), 468 states have call successors, (468), 112 states have call predecessors, (468), 110 states have return successors, (503), 451 states have call predecessors, (503), 464 states have call successors, (503) [2022-11-23 15:25:00,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1807 states to 1807 states and 2861 transitions. [2022-11-23 15:25:00,980 INFO L78 Accepts]: Start accepts. Automaton has 1807 states and 2861 transitions. Word has length 68 [2022-11-23 15:25:00,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:25:00,981 INFO L495 AbstractCegarLoop]: Abstraction has 1807 states and 2861 transitions. [2022-11-23 15:25:00,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 3 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 3 states have call successors, (12) [2022-11-23 15:25:00,982 INFO L276 IsEmpty]: Start isEmpty. Operand 1807 states and 2861 transitions. [2022-11-23 15:25:00,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-11-23 15:25:00,986 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:25:00,987 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:25:01,002 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4157ced1-4e63-4335-a64f-3f9b21ee947a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-23 15:25:01,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4157ced1-4e63-4335-a64f-3f9b21ee947a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:25:01,198 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:25:01,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:25:01,199 INFO L85 PathProgramCache]: Analyzing trace with hash 784617895, now seen corresponding path program 1 times [2022-11-23 15:25:01,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:25:01,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308299303] [2022-11-23 15:25:01,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:25:01,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:25:01,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:25:01,783 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 15:25:01,784 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:25:01,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308299303] [2022-11-23 15:25:01,784 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308299303] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:25:01,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339092132] [2022-11-23 15:25:01,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:25:01,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:25:01,785 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4157ced1-4e63-4335-a64f-3f9b21ee947a/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:25:01,787 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4157ced1-4e63-4335-a64f-3f9b21ee947a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:25:01,796 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4157ced1-4e63-4335-a64f-3f9b21ee947a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-23 15:25:02,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:25:02,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 1550 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-23 15:25:02,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:25:02,496 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 15:25:02,497 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:25:02,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [339092132] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:25:02,497 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 15:25:02,497 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2022-11-23 15:25:02,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642158764] [2022-11-23 15:25:02,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:25:02,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 15:25:02,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:25:02,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 15:25:02,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-11-23 15:25:02,500 INFO L87 Difference]: Start difference. First operand 1807 states and 2861 transitions. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 4 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) [2022-11-23 15:25:03,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:25:03,617 INFO L93 Difference]: Finished difference Result 3198 states and 5029 transitions. [2022-11-23 15:25:03,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 15:25:03,619 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 4 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) Word has length 72 [2022-11-23 15:25:03,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:25:03,634 INFO L225 Difference]: With dead ends: 3198 [2022-11-23 15:25:03,634 INFO L226 Difference]: Without dead ends: 2042 [2022-11-23 15:25:03,642 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-11-23 15:25:03,643 INFO L413 NwaCegarLoop]: 708 mSDtfsCounter, 534 mSDsluCounter, 1323 mSDsCounter, 0 mSdLazyCounter, 521 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 542 SdHoareTripleChecker+Valid, 2031 SdHoareTripleChecker+Invalid, 527 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 521 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-23 15:25:03,644 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [542 Valid, 2031 Invalid, 527 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 521 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-23 15:25:03,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2042 states. [2022-11-23 15:25:03,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2042 to 2023. [2022-11-23 15:25:03,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2023 states, 1402 states have (on average 1.5213980028530671) internal successors, (2133), 1495 states have internal predecessors, (2133), 495 states have call successors, (495), 124 states have call predecessors, (495), 125 states have return successors, (533), 478 states have call predecessors, (533), 491 states have call successors, (533) [2022-11-23 15:25:03,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2023 states to 2023 states and 3161 transitions. [2022-11-23 15:25:03,810 INFO L78 Accepts]: Start accepts. Automaton has 2023 states and 3161 transitions. Word has length 72 [2022-11-23 15:25:03,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:25:03,811 INFO L495 AbstractCegarLoop]: Abstraction has 2023 states and 3161 transitions. [2022-11-23 15:25:03,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 4 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) [2022-11-23 15:25:03,812 INFO L276 IsEmpty]: Start isEmpty. Operand 2023 states and 3161 transitions. [2022-11-23 15:25:03,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-23 15:25:03,816 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:25:03,816 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:25:03,832 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4157ced1-4e63-4335-a64f-3f9b21ee947a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-23 15:25:04,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4157ced1-4e63-4335-a64f-3f9b21ee947a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:25:04,026 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:25:04,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:25:04,027 INFO L85 PathProgramCache]: Analyzing trace with hash -456121376, now seen corresponding path program 1 times [2022-11-23 15:25:04,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:25:04,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830031899] [2022-11-23 15:25:04,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:25:04,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:25:04,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:25:04,555 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 15:25:04,555 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:25:04,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830031899] [2022-11-23 15:25:04,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830031899] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:25:04,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1334208203] [2022-11-23 15:25:04,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:25:04,557 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:25:04,557 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4157ced1-4e63-4335-a64f-3f9b21ee947a/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:25:04,558 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4157ced1-4e63-4335-a64f-3f9b21ee947a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:25:04,589 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4157ced1-4e63-4335-a64f-3f9b21ee947a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-23 15:25:05,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:25:05,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 1539 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-23 15:25:05,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:25:05,100 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 15:25:05,100 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:25:05,100 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1334208203] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:25:05,101 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 15:25:05,101 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2022-11-23 15:25:05,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662516869] [2022-11-23 15:25:05,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:25:05,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 15:25:05,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:25:05,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 15:25:05,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-23 15:25:05,103 INFO L87 Difference]: Start difference. First operand 2023 states and 3161 transitions. Second operand has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-23 15:25:05,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:25:05,551 INFO L93 Difference]: Finished difference Result 3782 states and 5980 transitions. [2022-11-23 15:25:05,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 15:25:05,552 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 73 [2022-11-23 15:25:05,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:25:05,569 INFO L225 Difference]: With dead ends: 3782 [2022-11-23 15:25:05,569 INFO L226 Difference]: Without dead ends: 2023 [2022-11-23 15:25:05,581 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-11-23 15:25:05,582 INFO L413 NwaCegarLoop]: 597 mSDtfsCounter, 276 mSDsluCounter, 952 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 287 SdHoareTripleChecker+Valid, 1549 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-23 15:25:05,582 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [287 Valid, 1549 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-23 15:25:05,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2023 states. [2022-11-23 15:25:05,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2023 to 2023. [2022-11-23 15:25:05,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2023 states, 1402 states have (on average 1.4828815977175465) internal successors, (2079), 1495 states have internal predecessors, (2079), 495 states have call successors, (495), 124 states have call predecessors, (495), 125 states have return successors, (533), 478 states have call predecessors, (533), 491 states have call successors, (533) [2022-11-23 15:25:05,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2023 states to 2023 states and 3107 transitions. [2022-11-23 15:25:05,818 INFO L78 Accepts]: Start accepts. Automaton has 2023 states and 3107 transitions. Word has length 73 [2022-11-23 15:25:05,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:25:05,819 INFO L495 AbstractCegarLoop]: Abstraction has 2023 states and 3107 transitions. [2022-11-23 15:25:05,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-23 15:25:05,819 INFO L276 IsEmpty]: Start isEmpty. Operand 2023 states and 3107 transitions. [2022-11-23 15:25:05,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-11-23 15:25:05,824 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:25:05,824 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:25:05,835 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4157ced1-4e63-4335-a64f-3f9b21ee947a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-23 15:25:06,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4157ced1-4e63-4335-a64f-3f9b21ee947a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-23 15:25:06,034 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:25:06,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:25:06,035 INFO L85 PathProgramCache]: Analyzing trace with hash -511609884, now seen corresponding path program 1 times [2022-11-23 15:25:06,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:25:06,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123992560] [2022-11-23 15:25:06,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:25:06,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:25:06,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:25:06,602 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-23 15:25:06,602 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:25:06,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123992560] [2022-11-23 15:25:06,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123992560] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:25:06,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191545762] [2022-11-23 15:25:06,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:25:06,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:25:06,604 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4157ced1-4e63-4335-a64f-3f9b21ee947a/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:25:06,605 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4157ced1-4e63-4335-a64f-3f9b21ee947a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:25:06,613 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4157ced1-4e63-4335-a64f-3f9b21ee947a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-23 15:25:07,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:25:07,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 1549 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-23 15:25:07,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:25:07,421 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-23 15:25:07,421 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:25:07,854 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-23 15:25:07,855 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [191545762] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-23 15:25:07,855 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-23 15:25:07,855 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [6, 9] total 16 [2022-11-23 15:25:07,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139302087] [2022-11-23 15:25:07,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:25:07,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-23 15:25:07,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:25:07,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-23 15:25:07,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2022-11-23 15:25:07,863 INFO L87 Difference]: Start difference. First operand 2023 states and 3107 transitions. Second operand has 9 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 4 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (13), 4 states have call predecessors, (13), 3 states have call successors, (13) [2022-11-23 15:25:13,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:25:13,006 INFO L93 Difference]: Finished difference Result 4825 states and 7674 transitions. [2022-11-23 15:25:13,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-23 15:25:13,007 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 4 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (13), 4 states have call predecessors, (13), 3 states have call successors, (13) Word has length 75 [2022-11-23 15:25:13,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:25:13,035 INFO L225 Difference]: With dead ends: 4825 [2022-11-23 15:25:13,035 INFO L226 Difference]: Without dead ends: 3670 [2022-11-23 15:25:13,046 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 144 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=145, Invalid=725, Unknown=0, NotChecked=0, Total=870 [2022-11-23 15:25:13,048 INFO L413 NwaCegarLoop]: 657 mSDtfsCounter, 2269 mSDsluCounter, 2450 mSDsCounter, 0 mSdLazyCounter, 2780 mSolverCounterSat, 1037 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2349 SdHoareTripleChecker+Valid, 3107 SdHoareTripleChecker+Invalid, 3817 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1037 IncrementalHoareTripleChecker+Valid, 2780 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-11-23 15:25:13,048 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2349 Valid, 3107 Invalid, 3817 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1037 Valid, 2780 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2022-11-23 15:25:13,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3670 states. [2022-11-23 15:25:13,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3670 to 3559. [2022-11-23 15:25:13,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3559 states, 2529 states have (on average 1.4887307236061684) internal successors, (3765), 2672 states have internal predecessors, (3765), 802 states have call successors, (802), 216 states have call predecessors, (802), 227 states have return successors, (973), 778 states have call predecessors, (973), 797 states have call successors, (973) [2022-11-23 15:25:13,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3559 states to 3559 states and 5540 transitions. [2022-11-23 15:25:13,415 INFO L78 Accepts]: Start accepts. Automaton has 3559 states and 5540 transitions. Word has length 75 [2022-11-23 15:25:13,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:25:13,415 INFO L495 AbstractCegarLoop]: Abstraction has 3559 states and 5540 transitions. [2022-11-23 15:25:13,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 4 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (13), 4 states have call predecessors, (13), 3 states have call successors, (13) [2022-11-23 15:25:13,416 INFO L276 IsEmpty]: Start isEmpty. Operand 3559 states and 5540 transitions. [2022-11-23 15:25:13,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-11-23 15:25:13,426 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:25:13,427 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:25:13,442 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4157ced1-4e63-4335-a64f-3f9b21ee947a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-23 15:25:13,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4157ced1-4e63-4335-a64f-3f9b21ee947a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-23 15:25:13,637 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:25:13,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:25:13,637 INFO L85 PathProgramCache]: Analyzing trace with hash 841097752, now seen corresponding path program 1 times [2022-11-23 15:25:13,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:25:13,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871334254] [2022-11-23 15:25:13,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:25:13,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:25:13,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:25:14,011 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-23 15:25:14,011 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:25:14,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871334254] [2022-11-23 15:25:14,012 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871334254] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:25:14,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19639835] [2022-11-23 15:25:14,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:25:14,012 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:25:14,013 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4157ced1-4e63-4335-a64f-3f9b21ee947a/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:25:14,014 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4157ced1-4e63-4335-a64f-3f9b21ee947a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:25:14,042 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4157ced1-4e63-4335-a64f-3f9b21ee947a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-23 15:25:14,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:25:14,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 1551 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-23 15:25:14,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:25:14,536 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-23 15:25:14,537 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:25:14,537 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [19639835] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:25:14,537 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 15:25:14,537 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2022-11-23 15:25:14,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017411392] [2022-11-23 15:25:14,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:25:14,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 15:25:14,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:25:14,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 15:25:14,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-23 15:25:14,540 INFO L87 Difference]: Start difference. First operand 3559 states and 5540 transitions. Second operand has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 4 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) [2022-11-23 15:25:15,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:25:15,636 INFO L93 Difference]: Finished difference Result 7442 states and 11785 transitions. [2022-11-23 15:25:15,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 15:25:15,637 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 4 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) Word has length 76 [2022-11-23 15:25:15,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:25:15,668 INFO L225 Difference]: With dead ends: 7442 [2022-11-23 15:25:15,669 INFO L226 Difference]: Without dead ends: 3895 [2022-11-23 15:25:15,693 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-11-23 15:25:15,695 INFO L413 NwaCegarLoop]: 706 mSDtfsCounter, 586 mSDsluCounter, 1220 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 642 SdHoareTripleChecker+Valid, 1926 SdHoareTripleChecker+Invalid, 453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-23 15:25:15,695 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [642 Valid, 1926 Invalid, 453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 316 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-23 15:25:15,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3895 states. [2022-11-23 15:25:16,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3895 to 3513. [2022-11-23 15:25:16,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3513 states, 2483 states have (on average 1.4800644381796215) internal successors, (3675), 2630 states have internal predecessors, (3675), 809 states have call successors, (809), 204 states have call predecessors, (809), 220 states have return successors, (1073), 774 states have call predecessors, (1073), 804 states have call successors, (1073) [2022-11-23 15:25:16,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3513 states to 3513 states and 5557 transitions. [2022-11-23 15:25:16,071 INFO L78 Accepts]: Start accepts. Automaton has 3513 states and 5557 transitions. Word has length 76 [2022-11-23 15:25:16,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:25:16,072 INFO L495 AbstractCegarLoop]: Abstraction has 3513 states and 5557 transitions. [2022-11-23 15:25:16,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 4 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) [2022-11-23 15:25:16,094 INFO L276 IsEmpty]: Start isEmpty. Operand 3513 states and 5557 transitions. [2022-11-23 15:25:16,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-11-23 15:25:16,097 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:25:16,098 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:25:16,108 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4157ced1-4e63-4335-a64f-3f9b21ee947a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-23 15:25:16,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4157ced1-4e63-4335-a64f-3f9b21ee947a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:25:16,307 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:25:16,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:25:16,308 INFO L85 PathProgramCache]: Analyzing trace with hash 2063686312, now seen corresponding path program 1 times [2022-11-23 15:25:16,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:25:16,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876475663] [2022-11-23 15:25:16,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:25:16,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:25:16,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:25:16,598 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 15:25:16,599 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:25:16,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876475663] [2022-11-23 15:25:16,599 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876475663] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:25:16,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840770826] [2022-11-23 15:25:16,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:25:16,600 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:25:16,600 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4157ced1-4e63-4335-a64f-3f9b21ee947a/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:25:16,602 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4157ced1-4e63-4335-a64f-3f9b21ee947a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:25:16,637 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4157ced1-4e63-4335-a64f-3f9b21ee947a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-23 15:25:17,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:25:17,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 1539 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-23 15:25:17,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:25:17,228 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 15:25:17,229 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:25:17,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [840770826] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:25:17,229 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 15:25:17,229 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-23 15:25:17,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799590679] [2022-11-23 15:25:17,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:25:17,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:25:17,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:25:17,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:25:17,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-23 15:25:17,236 INFO L87 Difference]: Start difference. First operand 3513 states and 5557 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2022-11-23 15:25:17,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:25:17,820 INFO L93 Difference]: Finished difference Result 7855 states and 12548 transitions. [2022-11-23 15:25:17,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:25:17,821 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 75 [2022-11-23 15:25:17,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:25:17,867 INFO L225 Difference]: With dead ends: 7855 [2022-11-23 15:25:17,867 INFO L226 Difference]: Without dead ends: 4354 [2022-11-23 15:25:17,897 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-23 15:25:17,900 INFO L413 NwaCegarLoop]: 769 mSDtfsCounter, 528 mSDsluCounter, 463 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 528 SdHoareTripleChecker+Valid, 1232 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 15:25:17,900 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [528 Valid, 1232 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 15:25:17,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4354 states. [2022-11-23 15:25:18,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4354 to 3468. [2022-11-23 15:25:18,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3468 states, 2453 states have (on average 1.4757439869547493) internal successors, (3620), 2598 states have internal predecessors, (3620), 800 states have call successors, (800), 201 states have call predecessors, (800), 214 states have return successors, (1033), 764 states have call predecessors, (1033), 795 states have call successors, (1033) [2022-11-23 15:25:18,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3468 states to 3468 states and 5453 transitions. [2022-11-23 15:25:18,344 INFO L78 Accepts]: Start accepts. Automaton has 3468 states and 5453 transitions. Word has length 75 [2022-11-23 15:25:18,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:25:18,345 INFO L495 AbstractCegarLoop]: Abstraction has 3468 states and 5453 transitions. [2022-11-23 15:25:18,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2022-11-23 15:25:18,346 INFO L276 IsEmpty]: Start isEmpty. Operand 3468 states and 5453 transitions. [2022-11-23 15:25:18,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-11-23 15:25:18,350 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:25:18,350 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:25:18,365 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4157ced1-4e63-4335-a64f-3f9b21ee947a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-23 15:25:18,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4157ced1-4e63-4335-a64f-3f9b21ee947a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:25:18,566 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:25:18,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:25:18,567 INFO L85 PathProgramCache]: Analyzing trace with hash -660152346, now seen corresponding path program 1 times [2022-11-23 15:25:18,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:25:18,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662124583] [2022-11-23 15:25:18,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:25:18,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:25:18,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:25:19,002 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-23 15:25:19,003 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:25:19,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662124583] [2022-11-23 15:25:19,003 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662124583] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:25:19,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951226785] [2022-11-23 15:25:19,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:25:19,004 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:25:19,004 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4157ced1-4e63-4335-a64f-3f9b21ee947a/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:25:19,005 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4157ced1-4e63-4335-a64f-3f9b21ee947a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:25:19,017 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4157ced1-4e63-4335-a64f-3f9b21ee947a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-23 15:25:19,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:25:19,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 1566 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-23 15:25:19,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:25:19,617 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-23 15:25:19,617 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:25:19,618 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1951226785] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:25:19,618 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 15:25:19,618 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2022-11-23 15:25:19,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580769528] [2022-11-23 15:25:19,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:25:19,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 15:25:19,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:25:19,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 15:25:19,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-23 15:25:19,620 INFO L87 Difference]: Start difference. First operand 3468 states and 5453 transitions. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 4 states have call successors, (16), 3 states have call predecessors, (16), 4 states have return successors, (14), 3 states have call predecessors, (14), 4 states have call successors, (14) [2022-11-23 15:25:20,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:25:20,653 INFO L93 Difference]: Finished difference Result 6364 states and 10040 transitions. [2022-11-23 15:25:20,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 15:25:20,654 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 4 states have call successors, (16), 3 states have call predecessors, (16), 4 states have return successors, (14), 3 states have call predecessors, (14), 4 states have call successors, (14) Word has length 79 [2022-11-23 15:25:20,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:25:20,698 INFO L225 Difference]: With dead ends: 6364 [2022-11-23 15:25:20,698 INFO L226 Difference]: Without dead ends: 3489 [2022-11-23 15:25:20,713 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-11-23 15:25:20,713 INFO L413 NwaCegarLoop]: 730 mSDtfsCounter, 414 mSDsluCounter, 1827 mSDsCounter, 0 mSdLazyCounter, 363 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 414 SdHoareTripleChecker+Valid, 2557 SdHoareTripleChecker+Invalid, 369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 363 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-23 15:25:20,715 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [414 Valid, 2557 Invalid, 369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 363 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-23 15:25:20,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3489 states. [2022-11-23 15:25:20,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3489 to 3472. [2022-11-23 15:25:21,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3472 states, 2453 states have (on average 1.4757439869547493) internal successors, (3620), 2602 states have internal predecessors, (3620), 804 states have call successors, (804), 201 states have call predecessors, (804), 214 states have return successors, (1037), 764 states have call predecessors, (1037), 799 states have call successors, (1037) [2022-11-23 15:25:21,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3472 states to 3472 states and 5461 transitions. [2022-11-23 15:25:21,042 INFO L78 Accepts]: Start accepts. Automaton has 3472 states and 5461 transitions. Word has length 79 [2022-11-23 15:25:21,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:25:21,043 INFO L495 AbstractCegarLoop]: Abstraction has 3472 states and 5461 transitions. [2022-11-23 15:25:21,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 4 states have call successors, (16), 3 states have call predecessors, (16), 4 states have return successors, (14), 3 states have call predecessors, (14), 4 states have call successors, (14) [2022-11-23 15:25:21,043 INFO L276 IsEmpty]: Start isEmpty. Operand 3472 states and 5461 transitions. [2022-11-23 15:25:21,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-11-23 15:25:21,047 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:25:21,048 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:25:21,063 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4157ced1-4e63-4335-a64f-3f9b21ee947a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-23 15:25:21,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4157ced1-4e63-4335-a64f-3f9b21ee947a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-23 15:25:21,262 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:25:21,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:25:21,262 INFO L85 PathProgramCache]: Analyzing trace with hash -1812611093, now seen corresponding path program 1 times [2022-11-23 15:25:21,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:25:21,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304267713] [2022-11-23 15:25:21,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:25:21,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:25:21,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:25:21,777 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-23 15:25:21,778 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:25:21,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304267713] [2022-11-23 15:25:21,778 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304267713] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:25:21,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519701984] [2022-11-23 15:25:21,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:25:21,779 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:25:21,779 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4157ced1-4e63-4335-a64f-3f9b21ee947a/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:25:21,782 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4157ced1-4e63-4335-a64f-3f9b21ee947a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:25:21,788 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4157ced1-4e63-4335-a64f-3f9b21ee947a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-23 15:25:22,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:25:22,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 1638 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-23 15:25:22,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:25:22,288 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-23 15:25:22,288 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:25:22,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [519701984] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:25:22,289 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 15:25:22,289 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2022-11-23 15:25:22,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848912141] [2022-11-23 15:25:22,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:25:22,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 15:25:22,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:25:22,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 15:25:22,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-23 15:25:22,291 INFO L87 Difference]: Start difference. First operand 3472 states and 5461 transitions. Second operand has 5 states, 5 states have (on average 11.4) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 3 states have call predecessors, (18), 2 states have call successors, (18) [2022-11-23 15:25:22,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:25:22,801 INFO L93 Difference]: Finished difference Result 6681 states and 10752 transitions. [2022-11-23 15:25:22,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 15:25:22,802 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 3 states have call predecessors, (18), 2 states have call successors, (18) Word has length 99 [2022-11-23 15:25:22,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:25:22,834 INFO L225 Difference]: With dead ends: 6681 [2022-11-23 15:25:22,834 INFO L226 Difference]: Without dead ends: 3663 [2022-11-23 15:25:22,856 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-23 15:25:22,857 INFO L413 NwaCegarLoop]: 564 mSDtfsCounter, 13 mSDsluCounter, 1660 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 2224 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 15:25:22,858 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 2224 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 15:25:22,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3663 states. [2022-11-23 15:25:23,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3663 to 3546. [2022-11-23 15:25:23,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3546 states, 2503 states have (on average 1.4662405113863364) internal successors, (3670), 2661 states have internal predecessors, (3670), 808 states have call successors, (808), 201 states have call predecessors, (808), 234 states have return successors, (1159), 779 states have call predecessors, (1159), 803 states have call successors, (1159) [2022-11-23 15:25:23,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3546 states to 3546 states and 5637 transitions. [2022-11-23 15:25:23,342 INFO L78 Accepts]: Start accepts. Automaton has 3546 states and 5637 transitions. Word has length 99 [2022-11-23 15:25:23,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:25:23,343 INFO L495 AbstractCegarLoop]: Abstraction has 3546 states and 5637 transitions. [2022-11-23 15:25:23,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 3 states have call predecessors, (18), 2 states have call successors, (18) [2022-11-23 15:25:23,343 INFO L276 IsEmpty]: Start isEmpty. Operand 3546 states and 5637 transitions. [2022-11-23 15:25:23,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-11-23 15:25:23,356 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:25:23,357 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:25:23,367 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4157ced1-4e63-4335-a64f-3f9b21ee947a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-23 15:25:23,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4157ced1-4e63-4335-a64f-3f9b21ee947a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:25:23,567 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:25:23,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:25:23,568 INFO L85 PathProgramCache]: Analyzing trace with hash 546420303, now seen corresponding path program 1 times [2022-11-23 15:25:23,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:25:23,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525229861] [2022-11-23 15:25:23,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:25:23,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:25:23,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:25:24,039 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-23 15:25:24,039 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:25:24,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525229861] [2022-11-23 15:25:24,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525229861] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:25:24,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576901696] [2022-11-23 15:25:24,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:25:24,041 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:25:24,041 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4157ced1-4e63-4335-a64f-3f9b21ee947a/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:25:24,042 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4157ced1-4e63-4335-a64f-3f9b21ee947a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:25:24,067 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4157ced1-4e63-4335-a64f-3f9b21ee947a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-23 15:25:24,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:25:24,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 1875 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-23 15:25:24,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:25:24,707 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-23 15:25:24,707 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:25:24,708 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1576901696] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:25:24,708 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 15:25:24,708 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 14 [2022-11-23 15:25:24,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441690609] [2022-11-23 15:25:24,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:25:24,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-23 15:25:24,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:25:24,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-23 15:25:24,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2022-11-23 15:25:24,711 INFO L87 Difference]: Start difference. First operand 3546 states and 5637 transitions. Second operand has 8 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 5 states have call successors, (21), 4 states have call predecessors, (21), 5 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) [2022-11-23 15:25:29,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:25:29,763 INFO L93 Difference]: Finished difference Result 7879 states and 12725 transitions. [2022-11-23 15:25:29,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-23 15:25:29,765 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 5 states have call successors, (21), 4 states have call predecessors, (21), 5 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) Word has length 117 [2022-11-23 15:25:29,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:25:29,830 INFO L225 Difference]: With dead ends: 7879 [2022-11-23 15:25:29,830 INFO L226 Difference]: Without dead ends: 4229 [2022-11-23 15:25:29,856 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2022-11-23 15:25:29,857 INFO L413 NwaCegarLoop]: 396 mSDtfsCounter, 1582 mSDsluCounter, 1143 mSDsCounter, 0 mSdLazyCounter, 3706 mSolverCounterSat, 1056 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1615 SdHoareTripleChecker+Valid, 1539 SdHoareTripleChecker+Invalid, 4762 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1056 IncrementalHoareTripleChecker+Valid, 3706 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-11-23 15:25:29,858 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1615 Valid, 1539 Invalid, 4762 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1056 Valid, 3706 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2022-11-23 15:25:29,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4229 states. [2022-11-23 15:25:30,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4229 to 3541. [2022-11-23 15:25:30,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3541 states, 2498 states have (on average 1.466773418734988) internal successors, (3664), 2656 states have internal predecessors, (3664), 808 states have call successors, (808), 201 states have call predecessors, (808), 234 states have return successors, (1159), 779 states have call predecessors, (1159), 803 states have call successors, (1159) [2022-11-23 15:25:30,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3541 states to 3541 states and 5631 transitions. [2022-11-23 15:25:30,287 INFO L78 Accepts]: Start accepts. Automaton has 3541 states and 5631 transitions. Word has length 117 [2022-11-23 15:25:30,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:25:30,288 INFO L495 AbstractCegarLoop]: Abstraction has 3541 states and 5631 transitions. [2022-11-23 15:25:30,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 5 states have call successors, (21), 4 states have call predecessors, (21), 5 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) [2022-11-23 15:25:30,289 INFO L276 IsEmpty]: Start isEmpty. Operand 3541 states and 5631 transitions. [2022-11-23 15:25:30,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-11-23 15:25:30,300 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:25:30,301 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:25:30,319 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4157ced1-4e63-4335-a64f-3f9b21ee947a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-23 15:25:30,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4157ced1-4e63-4335-a64f-3f9b21ee947a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-23 15:25:30,521 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:25:30,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:25:30,522 INFO L85 PathProgramCache]: Analyzing trace with hash 1284255827, now seen corresponding path program 1 times [2022-11-23 15:25:30,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:25:30,522 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983930101] [2022-11-23 15:25:30,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:25:30,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:25:30,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:25:31,113 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 22 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-23 15:25:31,114 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:25:31,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983930101] [2022-11-23 15:25:31,114 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983930101] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:25:31,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639610018] [2022-11-23 15:25:31,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:25:31,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:25:31,116 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4157ced1-4e63-4335-a64f-3f9b21ee947a/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:25:31,118 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4157ced1-4e63-4335-a64f-3f9b21ee947a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:25:31,141 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4157ced1-4e63-4335-a64f-3f9b21ee947a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-23 15:25:31,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:25:31,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 1886 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-23 15:25:31,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:25:31,743 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-23 15:25:31,743 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:25:31,743 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [639610018] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:25:31,743 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 15:25:31,744 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2022-11-23 15:25:31,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952880256] [2022-11-23 15:25:31,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:25:31,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:25:31,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:25:31,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:25:31,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-23 15:25:31,749 INFO L87 Difference]: Start difference. First operand 3541 states and 5631 transitions. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 3 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) [2022-11-23 15:25:32,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:25:32,452 INFO L93 Difference]: Finished difference Result 8268 states and 13378 transitions. [2022-11-23 15:25:32,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:25:32,453 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 3 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) Word has length 118 [2022-11-23 15:25:32,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:25:32,501 INFO L225 Difference]: With dead ends: 8268 [2022-11-23 15:25:32,502 INFO L226 Difference]: Without dead ends: 4739 [2022-11-23 15:25:32,530 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-23 15:25:32,531 INFO L413 NwaCegarLoop]: 674 mSDtfsCounter, 466 mSDsluCounter, 537 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 466 SdHoareTripleChecker+Valid, 1211 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 15:25:32,532 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [466 Valid, 1211 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 15:25:32,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4739 states. [2022-11-23 15:25:33,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4739 to 4671. [2022-11-23 15:25:33,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4671 states, 3305 states have (on average 1.4686838124054462) internal successors, (4854), 3519 states have internal predecessors, (4854), 1055 states have call successors, (1055), 263 states have call predecessors, (1055), 310 states have return successors, (1504), 1020 states have call predecessors, (1504), 1050 states have call successors, (1504) [2022-11-23 15:25:33,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4671 states to 4671 states and 7413 transitions. [2022-11-23 15:25:33,137 INFO L78 Accepts]: Start accepts. Automaton has 4671 states and 7413 transitions. Word has length 118 [2022-11-23 15:25:33,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:25:33,138 INFO L495 AbstractCegarLoop]: Abstraction has 4671 states and 7413 transitions. [2022-11-23 15:25:33,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 3 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) [2022-11-23 15:25:33,139 INFO L276 IsEmpty]: Start isEmpty. Operand 4671 states and 7413 transitions. [2022-11-23 15:25:33,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-11-23 15:25:33,153 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:25:33,153 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:25:33,170 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4157ced1-4e63-4335-a64f-3f9b21ee947a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-23 15:25:33,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4157ced1-4e63-4335-a64f-3f9b21ee947a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-23 15:25:33,364 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:25:33,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:25:33,365 INFO L85 PathProgramCache]: Analyzing trace with hash -431328819, now seen corresponding path program 1 times [2022-11-23 15:25:33,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:25:33,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377086510] [2022-11-23 15:25:33,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:25:33,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:25:33,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:25:33,851 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 25 proven. 3 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-23 15:25:33,852 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:25:33,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377086510] [2022-11-23 15:25:33,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377086510] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:25:33,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397625132] [2022-11-23 15:25:33,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:25:33,854 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:25:33,854 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4157ced1-4e63-4335-a64f-3f9b21ee947a/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:25:33,855 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4157ced1-4e63-4335-a64f-3f9b21ee947a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:25:33,893 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4157ced1-4e63-4335-a64f-3f9b21ee947a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-23 15:25:34,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:25:34,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 1901 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-23 15:25:34,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:25:34,590 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-23 15:25:34,590 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:25:34,590 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1397625132] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:25:34,591 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 15:25:34,591 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 10 [2022-11-23 15:25:34,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177335391] [2022-11-23 15:25:34,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:25:34,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 15:25:34,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:25:34,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 15:25:34,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-23 15:25:34,594 INFO L87 Difference]: Start difference. First operand 4671 states and 7413 transitions. Second operand has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 4 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2022-11-23 15:25:36,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:25:36,594 INFO L93 Difference]: Finished difference Result 9373 states and 15236 transitions. [2022-11-23 15:25:36,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 15:25:36,595 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 4 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) Word has length 123 [2022-11-23 15:25:36,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:25:36,635 INFO L225 Difference]: With dead ends: 9373 [2022-11-23 15:25:36,635 INFO L226 Difference]: Without dead ends: 5565 [2022-11-23 15:25:36,663 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2022-11-23 15:25:36,664 INFO L413 NwaCegarLoop]: 601 mSDtfsCounter, 681 mSDsluCounter, 580 mSDsCounter, 0 mSdLazyCounter, 617 mSolverCounterSat, 162 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 736 SdHoareTripleChecker+Valid, 1181 SdHoareTripleChecker+Invalid, 779 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 162 IncrementalHoareTripleChecker+Valid, 617 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-23 15:25:36,664 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [736 Valid, 1181 Invalid, 779 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [162 Valid, 617 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-23 15:25:36,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5565 states. [2022-11-23 15:25:37,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5565 to 5449. [2022-11-23 15:25:37,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5449 states, 3753 states have (on average 1.4628297362110312) internal successors, (5490), 4013 states have internal predecessors, (5490), 1318 states have call successors, (1318), 339 states have call predecessors, (1318), 377 states have return successors, (1814), 1276 states have call predecessors, (1814), 1311 states have call successors, (1814) [2022-11-23 15:25:37,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5449 states to 5449 states and 8622 transitions. [2022-11-23 15:25:37,334 INFO L78 Accepts]: Start accepts. Automaton has 5449 states and 8622 transitions. Word has length 123 [2022-11-23 15:25:37,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:25:37,334 INFO L495 AbstractCegarLoop]: Abstraction has 5449 states and 8622 transitions. [2022-11-23 15:25:37,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 4 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2022-11-23 15:25:37,335 INFO L276 IsEmpty]: Start isEmpty. Operand 5449 states and 8622 transitions. [2022-11-23 15:25:37,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-23 15:25:37,346 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:25:37,346 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:25:37,362 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4157ced1-4e63-4335-a64f-3f9b21ee947a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-23 15:25:37,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4157ced1-4e63-4335-a64f-3f9b21ee947a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-23 15:25:37,557 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:25:37,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:25:37,557 INFO L85 PathProgramCache]: Analyzing trace with hash -986205705, now seen corresponding path program 1 times [2022-11-23 15:25:37,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:25:37,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133174070] [2022-11-23 15:25:37,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:25:37,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:25:37,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:25:37,995 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 19 proven. 3 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-23 15:25:37,995 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:25:37,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133174070] [2022-11-23 15:25:37,996 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133174070] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:25:37,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411651668] [2022-11-23 15:25:37,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:25:37,996 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:25:37,997 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4157ced1-4e63-4335-a64f-3f9b21ee947a/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:25:37,998 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4157ced1-4e63-4335-a64f-3f9b21ee947a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:25:38,021 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4157ced1-4e63-4335-a64f-3f9b21ee947a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-23 15:25:38,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:25:38,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 1903 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-23 15:25:38,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:25:38,574 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-23 15:25:38,574 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:25:38,575 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1411651668] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:25:38,575 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 15:25:38,575 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 10 [2022-11-23 15:25:38,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337507912] [2022-11-23 15:25:38,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:25:38,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 15:25:38,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:25:38,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 15:25:38,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-23 15:25:38,577 INFO L87 Difference]: Start difference. First operand 5449 states and 8622 transitions. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 4 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2022-11-23 15:25:40,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:25:40,814 INFO L93 Difference]: Finished difference Result 13085 states and 21137 transitions. [2022-11-23 15:25:40,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 15:25:40,815 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 4 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) Word has length 124 [2022-11-23 15:25:40,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:25:40,883 INFO L225 Difference]: With dead ends: 13085 [2022-11-23 15:25:40,884 INFO L226 Difference]: Without dead ends: 8477 [2022-11-23 15:25:40,926 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2022-11-23 15:25:40,927 INFO L413 NwaCegarLoop]: 862 mSDtfsCounter, 555 mSDsluCounter, 766 mSDsCounter, 0 mSdLazyCounter, 748 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 615 SdHoareTripleChecker+Valid, 1628 SdHoareTripleChecker+Invalid, 899 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 748 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-23 15:25:40,927 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [615 Valid, 1628 Invalid, 899 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 748 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-23 15:25:40,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8477 states. [2022-11-23 15:25:41,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8477 to 8459. [2022-11-23 15:25:41,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8459 states, 5713 states have (on average 1.465604761071241) internal successors, (8373), 6147 states have internal predecessors, (8373), 2160 states have call successors, (2160), 545 states have call predecessors, (2160), 585 states have return successors, (2844), 2090 states have call predecessors, (2844), 2149 states have call successors, (2844) [2022-11-23 15:25:41,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8459 states to 8459 states and 13377 transitions. [2022-11-23 15:25:41,974 INFO L78 Accepts]: Start accepts. Automaton has 8459 states and 13377 transitions. Word has length 124 [2022-11-23 15:25:41,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:25:41,975 INFO L495 AbstractCegarLoop]: Abstraction has 8459 states and 13377 transitions. [2022-11-23 15:25:41,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 4 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2022-11-23 15:25:41,975 INFO L276 IsEmpty]: Start isEmpty. Operand 8459 states and 13377 transitions. [2022-11-23 15:25:41,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-11-23 15:25:41,989 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:25:41,989 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:25:41,999 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4157ced1-4e63-4335-a64f-3f9b21ee947a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-23 15:25:42,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4157ced1-4e63-4335-a64f-3f9b21ee947a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:25:42,199 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:25:42,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:25:42,199 INFO L85 PathProgramCache]: Analyzing trace with hash 1579359259, now seen corresponding path program 1 times [2022-11-23 15:25:42,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:25:42,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799802007] [2022-11-23 15:25:42,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:25:42,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:25:42,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:25:42,655 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 19 proven. 3 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-23 15:25:42,655 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:25:42,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799802007] [2022-11-23 15:25:42,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799802007] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:25:42,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1738529155] [2022-11-23 15:25:42,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:25:42,656 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:25:42,657 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4157ced1-4e63-4335-a64f-3f9b21ee947a/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:25:42,658 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4157ced1-4e63-4335-a64f-3f9b21ee947a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:25:42,665 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4157ced1-4e63-4335-a64f-3f9b21ee947a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-23 15:25:43,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:25:43,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 1904 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-23 15:25:43,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:25:43,396 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-23 15:25:43,397 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:25:43,397 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1738529155] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:25:43,397 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 15:25:43,397 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [8] total 15 [2022-11-23 15:25:43,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551584498] [2022-11-23 15:25:43,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:25:43,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-23 15:25:43,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:25:43,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-23 15:25:43,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2022-11-23 15:25:43,400 INFO L87 Difference]: Start difference. First operand 8459 states and 13377 transitions. Second operand has 9 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 3 states have call successors, (23), 3 states have call predecessors, (23), 5 states have return successors, (21), 5 states have call predecessors, (21), 3 states have call successors, (21) [2022-11-23 15:25:46,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:25:46,318 INFO L93 Difference]: Finished difference Result 21090 states and 33776 transitions. [2022-11-23 15:25:46,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-23 15:25:46,319 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 3 states have call successors, (23), 3 states have call predecessors, (23), 5 states have return successors, (21), 5 states have call predecessors, (21), 3 states have call successors, (21) Word has length 125 [2022-11-23 15:25:46,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:25:46,450 INFO L225 Difference]: With dead ends: 21090 [2022-11-23 15:25:46,450 INFO L226 Difference]: Without dead ends: 13494 [2022-11-23 15:25:46,536 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2022-11-23 15:25:46,537 INFO L413 NwaCegarLoop]: 693 mSDtfsCounter, 663 mSDsluCounter, 3690 mSDsCounter, 0 mSdLazyCounter, 1000 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 722 SdHoareTripleChecker+Valid, 4383 SdHoareTripleChecker+Invalid, 1132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 1000 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:25:46,537 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [722 Valid, 4383 Invalid, 1132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 1000 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-23 15:25:46,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13494 states. [2022-11-23 15:25:48,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13494 to 12003. [2022-11-23 15:25:48,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12003 states, 8049 states have (on average 1.4678842092185365) internal successors, (11815), 8678 states have internal predecessors, (11815), 3141 states have call successors, (3141), 759 states have call predecessors, (3141), 812 states have return successors, (4275), 3057 states have call predecessors, (4275), 3124 states have call successors, (4275) [2022-11-23 15:25:48,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12003 states to 12003 states and 19231 transitions. [2022-11-23 15:25:48,396 INFO L78 Accepts]: Start accepts. Automaton has 12003 states and 19231 transitions. Word has length 125 [2022-11-23 15:25:48,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:25:48,396 INFO L495 AbstractCegarLoop]: Abstraction has 12003 states and 19231 transitions. [2022-11-23 15:25:48,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 3 states have call successors, (23), 3 states have call predecessors, (23), 5 states have return successors, (21), 5 states have call predecessors, (21), 3 states have call successors, (21) [2022-11-23 15:25:48,397 INFO L276 IsEmpty]: Start isEmpty. Operand 12003 states and 19231 transitions. [2022-11-23 15:25:48,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-11-23 15:25:48,413 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:25:48,414 INFO L195 NwaCegarLoop]: trace histogram [7, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:25:48,431 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4157ced1-4e63-4335-a64f-3f9b21ee947a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-23 15:25:48,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4157ced1-4e63-4335-a64f-3f9b21ee947a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-23 15:25:48,626 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:25:48,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:25:48,627 INFO L85 PathProgramCache]: Analyzing trace with hash 582913744, now seen corresponding path program 1 times [2022-11-23 15:25:48,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:25:48,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284735988] [2022-11-23 15:25:48,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:25:48,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:25:48,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:25:50,347 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 23 proven. 3 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-11-23 15:25:50,347 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:25:50,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284735988] [2022-11-23 15:25:50,347 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284735988] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:25:50,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969306406] [2022-11-23 15:25:50,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:25:50,348 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:25:50,348 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4157ced1-4e63-4335-a64f-3f9b21ee947a/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:25:50,350 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4157ced1-4e63-4335-a64f-3f9b21ee947a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:25:50,373 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4157ced1-4e63-4335-a64f-3f9b21ee947a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-23 15:25:50,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:25:50,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 1950 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-23 15:25:50,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:25:51,098 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-23 15:25:51,099 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:25:51,099 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1969306406] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:25:51,099 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 15:25:51,099 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [18] total 24 [2022-11-23 15:25:51,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997822564] [2022-11-23 15:25:51,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:25:51,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-23 15:25:51,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:25:51,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-23 15:25:51,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2022-11-23 15:25:51,101 INFO L87 Difference]: Start difference. First operand 12003 states and 19231 transitions. Second operand has 8 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 4 states have call successors, (25), 3 states have call predecessors, (25), 5 states have return successors, (24), 5 states have call predecessors, (24), 4 states have call successors, (24) [2022-11-23 15:25:54,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:25:54,581 INFO L93 Difference]: Finished difference Result 23995 states and 39051 transitions. [2022-11-23 15:25:54,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-23 15:25:54,582 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 4 states have call successors, (25), 3 states have call predecessors, (25), 5 states have return successors, (24), 5 states have call predecessors, (24), 4 states have call successors, (24) Word has length 141 [2022-11-23 15:25:54,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:25:54,717 INFO L225 Difference]: With dead ends: 23995 [2022-11-23 15:25:54,717 INFO L226 Difference]: Without dead ends: 11097 [2022-11-23 15:25:54,910 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=80, Invalid=676, Unknown=0, NotChecked=0, Total=756 [2022-11-23 15:25:54,911 INFO L413 NwaCegarLoop]: 628 mSDtfsCounter, 761 mSDsluCounter, 2248 mSDsCounter, 0 mSdLazyCounter, 1554 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 822 SdHoareTripleChecker+Valid, 2876 SdHoareTripleChecker+Invalid, 1701 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 1554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-23 15:25:54,911 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [822 Valid, 2876 Invalid, 1701 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 1554 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-23 15:25:54,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11097 states. [2022-11-23 15:25:56,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11097 to 10547. [2022-11-23 15:25:56,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10547 states, 7133 states have (on average 1.4657226973223048) internal successors, (10455), 7643 states have internal predecessors, (10455), 2657 states have call successors, (2657), 710 states have call predecessors, (2657), 756 states have return successors, (3666), 2613 states have call predecessors, (3666), 2635 states have call successors, (3666) [2022-11-23 15:25:56,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10547 states to 10547 states and 16778 transitions. [2022-11-23 15:25:56,779 INFO L78 Accepts]: Start accepts. Automaton has 10547 states and 16778 transitions. Word has length 141 [2022-11-23 15:25:56,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:25:56,780 INFO L495 AbstractCegarLoop]: Abstraction has 10547 states and 16778 transitions. [2022-11-23 15:25:56,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 4 states have call successors, (25), 3 states have call predecessors, (25), 5 states have return successors, (24), 5 states have call predecessors, (24), 4 states have call successors, (24) [2022-11-23 15:25:56,780 INFO L276 IsEmpty]: Start isEmpty. Operand 10547 states and 16778 transitions. [2022-11-23 15:25:56,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-11-23 15:25:56,794 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:25:56,794 INFO L195 NwaCegarLoop]: trace histogram [5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:25:56,810 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4157ced1-4e63-4335-a64f-3f9b21ee947a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-23 15:25:57,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4157ced1-4e63-4335-a64f-3f9b21ee947a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-23 15:25:57,005 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:25:57,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:25:57,006 INFO L85 PathProgramCache]: Analyzing trace with hash 1353747635, now seen corresponding path program 1 times [2022-11-23 15:25:57,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:25:57,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784335058] [2022-11-23 15:25:57,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:25:57,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:25:57,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:25:57,400 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-23 15:25:57,400 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:25:57,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784335058] [2022-11-23 15:25:57,401 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784335058] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:25:57,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833673974] [2022-11-23 15:25:57,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:25:57,401 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:25:57,402 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4157ced1-4e63-4335-a64f-3f9b21ee947a/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:25:57,403 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4157ced1-4e63-4335-a64f-3f9b21ee947a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:25:57,410 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4157ced1-4e63-4335-a64f-3f9b21ee947a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-23 15:25:57,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:25:57,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 1700 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-23 15:25:57,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:25:58,071 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-23 15:25:58,071 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:25:58,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [833673974] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:25:58,072 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 15:25:58,072 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2022-11-23 15:25:58,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799183848] [2022-11-23 15:25:58,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:25:58,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 15:25:58,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:25:58,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 15:25:58,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-23 15:25:58,075 INFO L87 Difference]: Start difference. First operand 10547 states and 16778 transitions. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 4 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2022-11-23 15:25:59,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:25:59,970 INFO L93 Difference]: Finished difference Result 21676 states and 35081 transitions. [2022-11-23 15:25:59,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 15:25:59,971 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 4 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) Word has length 130 [2022-11-23 15:25:59,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:26:00,053 INFO L225 Difference]: With dead ends: 21676 [2022-11-23 15:26:00,054 INFO L226 Difference]: Without dead ends: 10547 [2022-11-23 15:26:00,192 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-11-23 15:26:00,193 INFO L413 NwaCegarLoop]: 617 mSDtfsCounter, 174 mSDsluCounter, 952 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 1569 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 15:26:00,193 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [184 Valid, 1569 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 15:26:00,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10547 states. [2022-11-23 15:26:01,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10547 to 10547. [2022-11-23 15:26:01,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10547 states, 7133 states have (on average 1.4455348380765456) internal successors, (10311), 7643 states have internal predecessors, (10311), 2657 states have call successors, (2657), 710 states have call predecessors, (2657), 756 states have return successors, (3666), 2613 states have call predecessors, (3666), 2635 states have call successors, (3666) [2022-11-23 15:26:01,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10547 states to 10547 states and 16634 transitions. [2022-11-23 15:26:01,748 INFO L78 Accepts]: Start accepts. Automaton has 10547 states and 16634 transitions. Word has length 130 [2022-11-23 15:26:01,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:26:01,749 INFO L495 AbstractCegarLoop]: Abstraction has 10547 states and 16634 transitions. [2022-11-23 15:26:01,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 4 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2022-11-23 15:26:01,750 INFO L276 IsEmpty]: Start isEmpty. Operand 10547 states and 16634 transitions. [2022-11-23 15:26:01,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2022-11-23 15:26:01,767 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:26:01,768 INFO L195 NwaCegarLoop]: trace histogram [7, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:26:01,787 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4157ced1-4e63-4335-a64f-3f9b21ee947a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-23 15:26:01,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4157ced1-4e63-4335-a64f-3f9b21ee947a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-23 15:26:01,980 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:26:01,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:26:01,981 INFO L85 PathProgramCache]: Analyzing trace with hash -1574030691, now seen corresponding path program 1 times [2022-11-23 15:26:01,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:26:01,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726969340] [2022-11-23 15:26:01,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:26:01,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:26:02,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:26:03,633 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 23 proven. 9 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-11-23 15:26:03,633 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:26:03,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726969340] [2022-11-23 15:26:03,633 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726969340] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:26:03,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384789871] [2022-11-23 15:26:03,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:26:03,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:26:03,634 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4157ced1-4e63-4335-a64f-3f9b21ee947a/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:26:03,636 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4157ced1-4e63-4335-a64f-3f9b21ee947a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:26:03,640 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4157ced1-4e63-4335-a64f-3f9b21ee947a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-23 15:26:04,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:26:04,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 1966 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-23 15:26:04,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:26:04,406 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 66 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-23 15:26:04,406 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:26:04,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1384789871] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:26:04,407 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 15:26:04,407 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [18] total 24 [2022-11-23 15:26:04,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991331211] [2022-11-23 15:26:04,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:26:04,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-23 15:26:04,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:26:04,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-23 15:26:04,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=491, Unknown=0, NotChecked=0, Total=552 [2022-11-23 15:26:04,410 INFO L87 Difference]: Start difference. First operand 10547 states and 16634 transitions. Second operand has 8 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 4 states have call successors, (26), 3 states have call predecessors, (26), 5 states have return successors, (25), 5 states have call predecessors, (25), 4 states have call successors, (25) [2022-11-23 15:26:07,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:26:07,409 INFO L93 Difference]: Finished difference Result 20152 states and 31844 transitions. [2022-11-23 15:26:07,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-23 15:26:07,410 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 4 states have call successors, (26), 3 states have call predecessors, (26), 5 states have return successors, (25), 5 states have call predecessors, (25), 4 states have call successors, (25) Word has length 148 [2022-11-23 15:26:07,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:26:07,506 INFO L225 Difference]: With dead ends: 20152 [2022-11-23 15:26:07,506 INFO L226 Difference]: Without dead ends: 10620 [2022-11-23 15:26:07,583 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=81, Invalid=731, Unknown=0, NotChecked=0, Total=812 [2022-11-23 15:26:07,584 INFO L413 NwaCegarLoop]: 630 mSDtfsCounter, 640 mSDsluCounter, 2623 mSDsCounter, 0 mSdLazyCounter, 1482 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 696 SdHoareTripleChecker+Valid, 3253 SdHoareTripleChecker+Invalid, 1610 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 1482 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-23 15:26:07,585 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [696 Valid, 3253 Invalid, 1610 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 1482 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-23 15:26:07,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10620 states. [2022-11-23 15:26:09,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10620 to 10526. [2022-11-23 15:26:09,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10526 states, 7127 states have (on average 1.4457696085309386) internal successors, (10304), 7624 states have internal predecessors, (10304), 2643 states have call successors, (2643), 714 states have call predecessors, (2643), 755 states have return successors, (3592), 2607 states have call predecessors, (3592), 2621 states have call successors, (3592) [2022-11-23 15:26:09,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10526 states to 10526 states and 16539 transitions. [2022-11-23 15:26:09,326 INFO L78 Accepts]: Start accepts. Automaton has 10526 states and 16539 transitions. Word has length 148 [2022-11-23 15:26:09,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:26:09,327 INFO L495 AbstractCegarLoop]: Abstraction has 10526 states and 16539 transitions. [2022-11-23 15:26:09,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 4 states have call successors, (26), 3 states have call predecessors, (26), 5 states have return successors, (25), 5 states have call predecessors, (25), 4 states have call successors, (25) [2022-11-23 15:26:09,328 INFO L276 IsEmpty]: Start isEmpty. Operand 10526 states and 16539 transitions. [2022-11-23 15:26:09,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-11-23 15:26:09,349 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:26:09,350 INFO L195 NwaCegarLoop]: trace histogram [5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:26:09,368 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4157ced1-4e63-4335-a64f-3f9b21ee947a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-23 15:26:09,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4157ced1-4e63-4335-a64f-3f9b21ee947a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:26:09,561 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:26:09,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:26:09,561 INFO L85 PathProgramCache]: Analyzing trace with hash -901727569, now seen corresponding path program 1 times [2022-11-23 15:26:09,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:26:09,562 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126389611] [2022-11-23 15:26:09,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:26:09,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:26:09,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:26:10,099 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-23 15:26:10,099 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:26:10,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126389611] [2022-11-23 15:26:10,100 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126389611] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:26:10,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22219964] [2022-11-23 15:26:10,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:26:10,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:26:10,101 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4157ced1-4e63-4335-a64f-3f9b21ee947a/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:26:10,102 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4157ced1-4e63-4335-a64f-3f9b21ee947a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:26:10,111 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4157ced1-4e63-4335-a64f-3f9b21ee947a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-23 15:26:10,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:26:10,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 1704 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-23 15:26:10,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:26:10,945 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 17 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-23 15:26:10,946 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:26:11,659 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-11-23 15:26:11,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [22219964] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:26:11,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1135000097] [2022-11-23 15:26:11,699 INFO L159 IcfgInterpreter]: Started Sifa with 115 locations of interest [2022-11-23 15:26:11,699 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:26:11,704 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:26:11,713 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:26:11,714 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:26:18,959 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 572 for LOIs [2022-11-23 15:26:23,678 INFO L197 IcfgInterpreter]: Interpreting procedure buttonForFloorIsPressed with input of size 439 for LOIs [2022-11-23 15:26:23,801 INFO L197 IcfgInterpreter]: Interpreting procedure initTopDown with input of size 599 for LOIs [2022-11-23 15:26:26,270 INFO L197 IcfgInterpreter]: Interpreting procedure initFloors with input of size 573 for LOIs [2022-11-23 15:26:26,551 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentHeading with input of size 437 for LOIs [2022-11-23 15:26:26,634 INFO L197 IcfgInterpreter]: Interpreting procedure bobCall with input of size 573 for LOIs [2022-11-23 15:26:31,009 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 577 for LOIs [2022-11-23 15:26:31,800 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 505 for LOIs [2022-11-23 15:26:31,959 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:26:37,390 WARN L233 SmtUtils]: Spent 5.29s on a formula simplification. DAG size of input: 514 DAG size of output: 509 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:26:54,871 WARN L233 SmtUtils]: Spent 5.16s on a formula simplification. DAG size of input: 513 DAG size of output: 509 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:27:03,440 WARN L233 SmtUtils]: Spent 5.58s on a formula simplification. DAG size of input: 545 DAG size of output: 512 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:27:12,500 WARN L233 SmtUtils]: Spent 8.75s on a formula simplification. DAG size of input: 645 DAG size of output: 592 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:27:21,776 WARN L233 SmtUtils]: Spent 8.92s on a formula simplification. DAG size of input: 645 DAG size of output: 592 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:27:32,190 WARN L233 SmtUtils]: Spent 6.19s on a formula simplification. DAG size of input: 772 DAG size of output: 594 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:27:48,115 WARN L233 SmtUtils]: Spent 5.81s on a formula simplification. DAG size of input: 585 DAG size of output: 580 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:27:58,642 WARN L233 SmtUtils]: Spent 6.32s on a formula simplification. DAG size of input: 626 DAG size of output: 595 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:28:05,346 WARN L233 SmtUtils]: Spent 6.32s on a formula simplification. DAG size of input: 626 DAG size of output: 594 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:28:17,740 WARN L233 SmtUtils]: Spent 6.09s on a formula simplification. DAG size of input: 630 DAG size of output: 596 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:28:24,387 WARN L233 SmtUtils]: Spent 6.20s on a formula simplification. DAG size of input: 630 DAG size of output: 596 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:28:24,395 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1135000097] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:28:24,396 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-23 15:28:24,396 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [6, 6, 7] total 36 [2022-11-23 15:28:24,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717065723] [2022-11-23 15:28:24,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:28:24,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-23 15:28:24,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:28:24,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-23 15:28:24,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=1120, Unknown=0, NotChecked=0, Total=1260 [2022-11-23 15:28:24,398 INFO L87 Difference]: Start difference. First operand 10526 states and 16539 transitions. Second operand has 25 states, 18 states have (on average 4.444444444444445) internal successors, (80), 14 states have internal predecessors, (80), 9 states have call successors, (23), 8 states have call predecessors, (23), 8 states have return successors, (21), 8 states have call predecessors, (21), 8 states have call successors, (21) [2022-11-23 15:28:31,241 WARN L233 SmtUtils]: Spent 6.10s on a formula simplification. DAG size of input: 610 DAG size of output: 575 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:28:37,761 WARN L233 SmtUtils]: Spent 6.26s on a formula simplification. DAG size of input: 616 DAG size of output: 581 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:28:43,908 WARN L233 SmtUtils]: Spent 5.14s on a formula simplification. DAG size of input: 594 DAG size of output: 576 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:28:49,517 WARN L233 SmtUtils]: Spent 5.03s on a formula simplification. DAG size of input: 592 DAG size of output: 574 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:28:55,068 WARN L233 SmtUtils]: Spent 5.29s on a formula simplification. DAG size of input: 598 DAG size of output: 580 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:29:18,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:29:18,087 INFO L93 Difference]: Finished difference Result 21162 states and 33254 transitions. [2022-11-23 15:29:18,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-23 15:29:18,088 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 18 states have (on average 4.444444444444445) internal successors, (80), 14 states have internal predecessors, (80), 9 states have call successors, (23), 8 states have call predecessors, (23), 8 states have return successors, (21), 8 states have call predecessors, (21), 8 states have call successors, (21) Word has length 134 [2022-11-23 15:29:18,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:29:18,197 INFO L225 Difference]: With dead ends: 21162 [2022-11-23 15:29:18,198 INFO L226 Difference]: Without dead ends: 10648 [2022-11-23 15:29:18,284 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 412 GetRequests, 369 SyntacticMatches, 4 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 141.4s TimeCoverageRelationStatistics Valid=175, Invalid=1465, Unknown=0, NotChecked=0, Total=1640 [2022-11-23 15:29:18,286 INFO L413 NwaCegarLoop]: 577 mSDtfsCounter, 298 mSDsluCounter, 2865 mSDsCounter, 0 mSdLazyCounter, 3959 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 312 SdHoareTripleChecker+Valid, 3442 SdHoareTripleChecker+Invalid, 4043 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 3959 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 23.5s IncrementalHoareTripleChecker+Time [2022-11-23 15:29:18,286 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [312 Valid, 3442 Invalid, 4043 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [84 Valid, 3959 Invalid, 0 Unknown, 0 Unchecked, 23.5s Time] [2022-11-23 15:29:18,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10648 states. [2022-11-23 15:29:19,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10648 to 10569. [2022-11-23 15:29:19,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10569 states, 7160 states have (on average 1.444413407821229) internal successors, (10342), 7656 states have internal predecessors, (10342), 2649 states have call successors, (2649), 719 states have call predecessors, (2649), 759 states have return successors, (3597), 2613 states have call predecessors, (3597), 2627 states have call successors, (3597) [2022-11-23 15:29:19,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10569 states to 10569 states and 16588 transitions. [2022-11-23 15:29:19,572 INFO L78 Accepts]: Start accepts. Automaton has 10569 states and 16588 transitions. Word has length 134 [2022-11-23 15:29:19,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:29:19,573 INFO L495 AbstractCegarLoop]: Abstraction has 10569 states and 16588 transitions. [2022-11-23 15:29:19,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 18 states have (on average 4.444444444444445) internal successors, (80), 14 states have internal predecessors, (80), 9 states have call successors, (23), 8 states have call predecessors, (23), 8 states have return successors, (21), 8 states have call predecessors, (21), 8 states have call successors, (21) [2022-11-23 15:29:19,573 INFO L276 IsEmpty]: Start isEmpty. Operand 10569 states and 16588 transitions. [2022-11-23 15:29:19,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2022-11-23 15:29:19,588 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:29:19,589 INFO L195 NwaCegarLoop]: trace histogram [7, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:29:19,605 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4157ced1-4e63-4335-a64f-3f9b21ee947a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-23 15:29:19,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4157ced1-4e63-4335-a64f-3f9b21ee947a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:29:19,798 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:29:19,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:29:19,798 INFO L85 PathProgramCache]: Analyzing trace with hash -1372281923, now seen corresponding path program 1 times [2022-11-23 15:29:19,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:29:19,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369804652] [2022-11-23 15:29:19,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:29:19,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:29:19,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:29:20,769 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 20 proven. 3 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2022-11-23 15:29:20,769 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:29:20,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369804652] [2022-11-23 15:29:20,770 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369804652] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:29:20,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566904406] [2022-11-23 15:29:20,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:29:20,770 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:29:20,770 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4157ced1-4e63-4335-a64f-3f9b21ee947a/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:29:20,778 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4157ced1-4e63-4335-a64f-3f9b21ee947a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:29:20,780 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4157ced1-4e63-4335-a64f-3f9b21ee947a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-23 15:29:21,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:29:21,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 1937 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-23 15:29:21,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:29:21,323 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-23 15:29:21,324 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:29:21,324 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [566904406] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:29:21,324 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 15:29:21,324 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [18] total 24 [2022-11-23 15:29:21,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432372021] [2022-11-23 15:29:21,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:29:21,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-23 15:29:21,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:29:21,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-23 15:29:21,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2022-11-23 15:29:21,326 INFO L87 Difference]: Start difference. First operand 10569 states and 16588 transitions. Second operand has 8 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 3 states have call successors, (24), 3 states have call predecessors, (24), 5 states have return successors, (23), 4 states have call predecessors, (23), 3 states have call successors, (23) [2022-11-23 15:29:23,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:29:23,865 INFO L93 Difference]: Finished difference Result 19323 states and 30435 transitions. [2022-11-23 15:29:23,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-23 15:29:23,866 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 3 states have call successors, (24), 3 states have call predecessors, (24), 5 states have return successors, (23), 4 states have call predecessors, (23), 3 states have call successors, (23) Word has length 139 [2022-11-23 15:29:23,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:29:23,954 INFO L225 Difference]: With dead ends: 19323 [2022-11-23 15:29:23,954 INFO L226 Difference]: Without dead ends: 9664 [2022-11-23 15:29:24,051 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=80, Invalid=676, Unknown=0, NotChecked=0, Total=756 [2022-11-23 15:29:24,052 INFO L413 NwaCegarLoop]: 943 mSDtfsCounter, 719 mSDsluCounter, 2792 mSDsCounter, 0 mSdLazyCounter, 1700 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 781 SdHoareTripleChecker+Valid, 3735 SdHoareTripleChecker+Invalid, 1844 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 1700 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-23 15:29:24,052 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [781 Valid, 3735 Invalid, 1844 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 1700 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-23 15:29:24,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9664 states. [2022-11-23 15:29:25,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9664 to 9572. [2022-11-23 15:29:25,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9572 states, 6508 states have (on average 1.4379225568531038) internal successors, (9358), 6951 states have internal predecessors, (9358), 2364 states have call successors, (2364), 655 states have call predecessors, (2364), 699 states have return successors, (3221), 2325 states have call predecessors, (3221), 2343 states have call successors, (3221) [2022-11-23 15:29:25,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9572 states to 9572 states and 14943 transitions. [2022-11-23 15:29:25,549 INFO L78 Accepts]: Start accepts. Automaton has 9572 states and 14943 transitions. Word has length 139 [2022-11-23 15:29:25,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:29:25,550 INFO L495 AbstractCegarLoop]: Abstraction has 9572 states and 14943 transitions. [2022-11-23 15:29:25,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 3 states have call successors, (24), 3 states have call predecessors, (24), 5 states have return successors, (23), 4 states have call predecessors, (23), 3 states have call successors, (23) [2022-11-23 15:29:25,551 INFO L276 IsEmpty]: Start isEmpty. Operand 9572 states and 14943 transitions. [2022-11-23 15:29:25,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-11-23 15:29:25,567 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:29:25,567 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:29:25,581 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4157ced1-4e63-4335-a64f-3f9b21ee947a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-23 15:29:25,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4157ced1-4e63-4335-a64f-3f9b21ee947a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-11-23 15:29:25,777 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:29:25,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:29:25,778 INFO L85 PathProgramCache]: Analyzing trace with hash 1750863251, now seen corresponding path program 1 times [2022-11-23 15:29:25,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:29:25,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285176327] [2022-11-23 15:29:25,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:29:25,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:29:25,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:29:26,375 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-23 15:29:26,375 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:29:26,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285176327] [2022-11-23 15:29:26,375 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285176327] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:29:26,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [538948237] [2022-11-23 15:29:26,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:29:26,375 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:29:26,376 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4157ced1-4e63-4335-a64f-3f9b21ee947a/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:29:26,376 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4157ced1-4e63-4335-a64f-3f9b21ee947a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:29:26,379 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4157ced1-4e63-4335-a64f-3f9b21ee947a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-23 15:29:26,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:29:26,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 1720 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-23 15:29:26,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:29:26,904 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 20 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-23 15:29:26,904 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:29:27,431 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-23 15:29:27,431 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [538948237] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:29:27,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1124279619] [2022-11-23 15:29:27,435 INFO L159 IcfgInterpreter]: Started Sifa with 119 locations of interest [2022-11-23 15:29:27,436 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:29:27,436 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:29:27,437 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:29:27,437 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:29:32,279 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 572 for LOIs [2022-11-23 15:29:39,448 INFO L197 IcfgInterpreter]: Interpreting procedure buttonForFloorIsPressed with input of size 499 for LOIs [2022-11-23 15:29:39,780 INFO L197 IcfgInterpreter]: Interpreting procedure initTopDown with input of size 599 for LOIs [2022-11-23 15:29:42,115 INFO L197 IcfgInterpreter]: Interpreting procedure initFloors with input of size 573 for LOIs [2022-11-23 15:29:42,388 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentHeading with input of size 437 for LOIs [2022-11-23 15:29:42,518 INFO L197 IcfgInterpreter]: Interpreting procedure bobCall with input of size 573 for LOIs [2022-11-23 15:29:46,838 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 577 for LOIs [2022-11-23 15:29:47,566 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 505 for LOIs [2022-11-23 15:29:47,711 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:30:21,704 WARN L233 SmtUtils]: Spent 7.31s on a formula simplification. DAG size of input: 645 DAG size of output: 592 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:30:29,335 WARN L233 SmtUtils]: Spent 7.26s on a formula simplification. DAG size of input: 645 DAG size of output: 592 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:30:38,572 WARN L233 SmtUtils]: Spent 5.70s on a formula simplification. DAG size of input: 772 DAG size of output: 594 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:30:54,414 WARN L233 SmtUtils]: Spent 5.75s on a formula simplification. DAG size of input: 585 DAG size of output: 580 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:31:06,438 WARN L233 SmtUtils]: Spent 7.19s on a formula simplification. DAG size of input: 626 DAG size of output: 595 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:31:13,839 WARN L233 SmtUtils]: Spent 6.90s on a formula simplification. DAG size of input: 626 DAG size of output: 594 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:31:24,819 WARN L233 SmtUtils]: Spent 10.42s on a formula simplification. DAG size of input: 499 DAG size of output: 442 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:31:36,367 WARN L233 SmtUtils]: Spent 10.94s on a formula simplification. DAG size of input: 535 DAG size of output: 450 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:31:43,732 WARN L233 SmtUtils]: Spent 6.79s on a formula simplification. DAG size of input: 630 DAG size of output: 596 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:31:51,241 WARN L233 SmtUtils]: Spent 6.96s on a formula simplification. DAG size of input: 630 DAG size of output: 596 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:31:59,630 WARN L233 SmtUtils]: Spent 6.58s on a formula simplification. DAG size of input: 633 DAG size of output: 598 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:32:06,765 WARN L233 SmtUtils]: Spent 6.56s on a formula simplification. DAG size of input: 631 DAG size of output: 597 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:32:06,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1124279619] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:32:06,772 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-23 15:32:06,772 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [10, 6, 7] total 42 [2022-11-23 15:32:06,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350101189] [2022-11-23 15:32:06,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:32:06,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-23 15:32:06,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:32:06,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-23 15:32:06,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=1525, Unknown=0, NotChecked=0, Total=1722 [2022-11-23 15:32:06,774 INFO L87 Difference]: Start difference. First operand 9572 states and 14943 transitions. Second operand has 27 states, 20 states have (on average 4.15) internal successors, (83), 15 states have internal predecessors, (83), 10 states have call successors, (24), 8 states have call predecessors, (24), 8 states have return successors, (22), 9 states have call predecessors, (22), 9 states have call successors, (22) [2022-11-23 15:32:14,452 WARN L233 SmtUtils]: Spent 6.62s on a formula simplification. DAG size of input: 610 DAG size of output: 575 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:32:21,179 WARN L233 SmtUtils]: Spent 6.42s on a formula simplification. DAG size of input: 616 DAG size of output: 581 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:32:27,747 WARN L233 SmtUtils]: Spent 5.51s on a formula simplification. DAG size of input: 594 DAG size of output: 576 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:32:40,692 WARN L233 SmtUtils]: Spent 12.26s on a formula simplification. DAG size of input: 596 DAG size of output: 578 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:32:54,459 WARN L233 SmtUtils]: Spent 13.34s on a formula simplification. DAG size of input: 602 DAG size of output: 584 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:33:24,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:33:24,741 INFO L93 Difference]: Finished difference Result 19132 states and 29787 transitions. [2022-11-23 15:33:24,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-23 15:33:24,745 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 20 states have (on average 4.15) internal successors, (83), 15 states have internal predecessors, (83), 10 states have call successors, (24), 8 states have call predecessors, (24), 8 states have return successors, (22), 9 states have call predecessors, (22), 9 states have call successors, (22) Word has length 140 [2022-11-23 15:33:24,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:33:24,821 INFO L225 Difference]: With dead ends: 19132 [2022-11-23 15:33:24,821 INFO L226 Difference]: Without dead ends: 9641 [2022-11-23 15:33:24,872 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 434 GetRequests, 383 SyntacticMatches, 6 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 424 ImplicationChecksByTransitivity, 184.5s TimeCoverageRelationStatistics Valid=238, Invalid=1924, Unknown=0, NotChecked=0, Total=2162 [2022-11-23 15:33:24,873 INFO L413 NwaCegarLoop]: 574 mSDtfsCounter, 173 mSDsluCounter, 3606 mSDsCounter, 0 mSdLazyCounter, 4755 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 30.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 4180 SdHoareTripleChecker+Invalid, 4798 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 4755 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 31.4s IncrementalHoareTripleChecker+Time [2022-11-23 15:33:24,873 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [187 Valid, 4180 Invalid, 4798 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [43 Valid, 4755 Invalid, 0 Unknown, 0 Unchecked, 31.4s Time] [2022-11-23 15:33:24,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9641 states. [2022-11-23 15:33:25,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9641 to 9574. [2022-11-23 15:33:25,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9574 states, 6509 states have (on average 1.4377016438777077) internal successors, (9358), 6952 states have internal predecessors, (9358), 2364 states have call successors, (2364), 656 states have call predecessors, (2364), 700 states have return successors, (3221), 2325 states have call predecessors, (3221), 2343 states have call successors, (3221) [2022-11-23 15:33:25,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9574 states to 9574 states and 14943 transitions. [2022-11-23 15:33:25,890 INFO L78 Accepts]: Start accepts. Automaton has 9574 states and 14943 transitions. Word has length 140 [2022-11-23 15:33:25,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:33:25,890 INFO L495 AbstractCegarLoop]: Abstraction has 9574 states and 14943 transitions. [2022-11-23 15:33:25,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 20 states have (on average 4.15) internal successors, (83), 15 states have internal predecessors, (83), 10 states have call successors, (24), 8 states have call predecessors, (24), 8 states have return successors, (22), 9 states have call predecessors, (22), 9 states have call successors, (22) [2022-11-23 15:33:25,891 INFO L276 IsEmpty]: Start isEmpty. Operand 9574 states and 14943 transitions. [2022-11-23 15:33:25,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-11-23 15:33:25,900 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:33:25,900 INFO L195 NwaCegarLoop]: trace histogram [7, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:33:25,907 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4157ced1-4e63-4335-a64f-3f9b21ee947a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-23 15:33:26,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4157ced1-4e63-4335-a64f-3f9b21ee947a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:33:26,101 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:33:26,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:33:26,101 INFO L85 PathProgramCache]: Analyzing trace with hash -1968403628, now seen corresponding path program 1 times [2022-11-23 15:33:26,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:33:26,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907287117] [2022-11-23 15:33:26,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:33:26,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:33:26,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:33:27,322 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 20 proven. 3 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-11-23 15:33:27,322 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:33:27,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907287117] [2022-11-23 15:33:27,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907287117] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:33:27,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390773976] [2022-11-23 15:33:27,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:33:27,323 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:33:27,323 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4157ced1-4e63-4335-a64f-3f9b21ee947a/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:33:27,325 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4157ced1-4e63-4335-a64f-3f9b21ee947a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:33:27,336 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4157ced1-4e63-4335-a64f-3f9b21ee947a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-23 15:33:27,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:33:27,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 1952 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-23 15:33:27,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:33:27,961 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-23 15:33:27,961 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:33:27,961 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1390773976] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:33:27,961 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 15:33:27,961 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [18] total 24 [2022-11-23 15:33:27,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259352408] [2022-11-23 15:33:27,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:33:27,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-23 15:33:27,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:33:27,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-23 15:33:27,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=491, Unknown=0, NotChecked=0, Total=552 [2022-11-23 15:33:27,963 INFO L87 Difference]: Start difference. First operand 9574 states and 14943 transitions. Second operand has 8 states, 7 states have (on average 12.142857142857142) internal successors, (85), 7 states have internal predecessors, (85), 3 states have call successors, (25), 3 states have call predecessors, (25), 5 states have return successors, (24), 4 states have call predecessors, (24), 3 states have call successors, (24) [2022-11-23 15:33:30,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:33:30,661 INFO L93 Difference]: Finished difference Result 18260 states and 28429 transitions. [2022-11-23 15:33:30,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-23 15:33:30,662 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 12.142857142857142) internal successors, (85), 7 states have internal predecessors, (85), 3 states have call successors, (25), 3 states have call predecessors, (25), 5 states have return successors, (24), 4 states have call predecessors, (24), 3 states have call successors, (24) Word has length 142 [2022-11-23 15:33:30,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:33:30,721 INFO L225 Difference]: With dead ends: 18260 [2022-11-23 15:33:30,721 INFO L226 Difference]: Without dead ends: 9600 [2022-11-23 15:33:30,776 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=77, Invalid=679, Unknown=0, NotChecked=0, Total=756 [2022-11-23 15:33:30,777 INFO L413 NwaCegarLoop]: 949 mSDtfsCounter, 560 mSDsluCounter, 3982 mSDsCounter, 0 mSdLazyCounter, 1796 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 616 SdHoareTripleChecker+Valid, 4931 SdHoareTripleChecker+Invalid, 1922 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 1796 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-23 15:33:30,777 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [616 Valid, 4931 Invalid, 1922 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 1796 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-23 15:33:30,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9600 states. [2022-11-23 15:33:31,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9600 to 9594. [2022-11-23 15:33:31,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9594 states, 6529 states have (on average 1.436360851585235) internal successors, (9378), 6962 states have internal predecessors, (9378), 2364 states have call successors, (2364), 666 states have call predecessors, (2364), 700 states have return successors, (3201), 2325 states have call predecessors, (3201), 2343 states have call successors, (3201) [2022-11-23 15:33:31,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9594 states to 9594 states and 14943 transitions. [2022-11-23 15:33:31,731 INFO L78 Accepts]: Start accepts. Automaton has 9594 states and 14943 transitions. Word has length 142 [2022-11-23 15:33:31,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:33:31,731 INFO L495 AbstractCegarLoop]: Abstraction has 9594 states and 14943 transitions. [2022-11-23 15:33:31,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 12.142857142857142) internal successors, (85), 7 states have internal predecessors, (85), 3 states have call successors, (25), 3 states have call predecessors, (25), 5 states have return successors, (24), 4 states have call predecessors, (24), 3 states have call successors, (24) [2022-11-23 15:33:31,732 INFO L276 IsEmpty]: Start isEmpty. Operand 9594 states and 14943 transitions. [2022-11-23 15:33:31,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-11-23 15:33:31,740 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:33:31,741 INFO L195 NwaCegarLoop]: trace histogram [7, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:33:31,749 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4157ced1-4e63-4335-a64f-3f9b21ee947a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-11-23 15:33:31,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4157ced1-4e63-4335-a64f-3f9b21ee947a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-11-23 15:33:31,942 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:33:31,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:33:31,942 INFO L85 PathProgramCache]: Analyzing trace with hash 1949535122, now seen corresponding path program 1 times [2022-11-23 15:33:31,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:33:31,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845704521] [2022-11-23 15:33:31,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:33:31,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:33:31,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:33:33,103 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 20 proven. 3 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-11-23 15:33:33,103 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:33:33,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845704521] [2022-11-23 15:33:33,104 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845704521] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:33:33,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617089303] [2022-11-23 15:33:33,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:33:33,105 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:33:33,105 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4157ced1-4e63-4335-a64f-3f9b21ee947a/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:33:33,114 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4157ced1-4e63-4335-a64f-3f9b21ee947a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:33:33,116 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4157ced1-4e63-4335-a64f-3f9b21ee947a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-23 15:33:33,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:33:33,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 1969 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-23 15:33:33,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:33:33,878 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 53 proven. 4 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-23 15:33:33,878 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:33:34,575 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-11-23 15:33:34,575 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [617089303] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:33:34,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [947705394] [2022-11-23 15:33:34,588 INFO L159 IcfgInterpreter]: Started Sifa with 98 locations of interest [2022-11-23 15:33:34,588 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:33:34,590 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:33:34,590 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:33:34,590 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:33:42,339 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 675 for LOIs [2022-11-23 15:33:52,534 INFO L197 IcfgInterpreter]: Interpreting procedure __automaton_fail with input of size 29 for LOIs [2022-11-23 15:33:52,540 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection with input of size 42 for LOIs [2022-11-23 15:33:52,720 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 66 for LOIs [2022-11-23 15:33:52,738 INFO L197 IcfgInterpreter]: Interpreting procedure buttonForFloorIsPressed with input of size 59 for LOIs [2022-11-23 15:33:52,757 INFO L197 IcfgInterpreter]: Interpreting procedure initTopDown with input of size 599 for LOIs [2022-11-23 15:33:55,035 INFO L197 IcfgInterpreter]: Interpreting procedure initFloors with input of size 573 for LOIs [2022-11-23 15:33:55,264 INFO L197 IcfgInterpreter]: Interpreting procedure continueInDirection with input of size 39 for LOIs [2022-11-23 15:33:55,362 INFO L197 IcfgInterpreter]: Interpreting procedure isTopFloor with input of size 59 for LOIs [2022-11-23 15:33:55,374 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentHeading with input of size 78 for LOIs [2022-11-23 15:33:55,387 INFO L197 IcfgInterpreter]: Interpreting procedure bobCall with input of size 573 for LOIs [2022-11-23 15:33:59,541 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 577 for LOIs [2022-11-23 15:34:00,212 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 505 for LOIs [2022-11-23 15:34:00,371 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:34:36,975 WARN L233 SmtUtils]: Spent 7.13s on a formula simplification. DAG size of input: 645 DAG size of output: 592 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:34:44,505 WARN L233 SmtUtils]: Spent 7.13s on a formula simplification. DAG size of input: 645 DAG size of output: 592 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:34:53,488 WARN L233 SmtUtils]: Spent 5.37s on a formula simplification. DAG size of input: 772 DAG size of output: 594 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:35:06,866 WARN L233 SmtUtils]: Spent 6.98s on a formula simplification. DAG size of input: 675 DAG size of output: 571 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:35:14,779 WARN L233 SmtUtils]: Spent 7.39s on a formula simplification. DAG size of input: 672 DAG size of output: 576 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:35:45,664 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '552828#(and (= ~currentHeading~0 0) (= ~head~0.offset 0) (<= ~floorButtons_0~0 2147483647) (= ~expectedDirection~0 1) (= ~head~0.base 0) (= |#NULL.offset| 0) (<= 0 (+ ~floorButtons_0~0 2147483648)) (<= 0 |#StackHeapBarrier|) (= ~maximumWeight~0 100) (= ~cleanupTimeShifts~0 12) (= |#NULL.base| 0))' at error location [2022-11-23 15:35:45,664 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 15:35:45,664 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 15:35:45,664 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 9, 10] total 29 [2022-11-23 15:35:45,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027474820] [2022-11-23 15:35:45,665 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 15:35:45,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-23 15:35:45,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:35:45,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-23 15:35:45,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=854, Invalid=10918, Unknown=0, NotChecked=0, Total=11772 [2022-11-23 15:35:45,670 INFO L87 Difference]: Start difference. First operand 9594 states and 14943 transitions. Second operand has 29 states, 21 states have (on average 8.523809523809524) internal successors, (179), 26 states have internal predecessors, (179), 15 states have call successors, (67), 9 states have call predecessors, (67), 15 states have return successors, (66), 16 states have call predecessors, (66), 15 states have call successors, (66) [2022-11-23 15:36:08,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:36:08,496 INFO L93 Difference]: Finished difference Result 26959 states and 44106 transitions. [2022-11-23 15:36:08,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-11-23 15:36:08,497 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 21 states have (on average 8.523809523809524) internal successors, (179), 26 states have internal predecessors, (179), 15 states have call successors, (67), 9 states have call predecessors, (67), 15 states have return successors, (66), 16 states have call predecessors, (66), 15 states have call successors, (66) Word has length 146 [2022-11-23 15:36:08,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:36:08,654 INFO L225 Difference]: With dead ends: 26959 [2022-11-23 15:36:08,654 INFO L226 Difference]: Without dead ends: 17978 [2022-11-23 15:36:08,752 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 582 GetRequests, 373 SyntacticMatches, 9 SemanticMatches, 200 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16947 ImplicationChecksByTransitivity, 109.0s TimeCoverageRelationStatistics Valid=3338, Invalid=37264, Unknown=0, NotChecked=0, Total=40602 [2022-11-23 15:36:08,753 INFO L413 NwaCegarLoop]: 526 mSDtfsCounter, 11577 mSDsluCounter, 5937 mSDsCounter, 0 mSdLazyCounter, 18878 mSolverCounterSat, 8505 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11577 SdHoareTripleChecker+Valid, 6463 SdHoareTripleChecker+Invalid, 27383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 8505 IncrementalHoareTripleChecker+Valid, 18878 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.5s IncrementalHoareTripleChecker+Time [2022-11-23 15:36:08,753 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11577 Valid, 6463 Invalid, 27383 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [8505 Valid, 18878 Invalid, 0 Unknown, 0 Unchecked, 16.5s Time] [2022-11-23 15:36:08,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17978 states. [2022-11-23 15:36:10,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17978 to 15654. [2022-11-23 15:36:10,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15654 states, 10590 states have (on average 1.4367327667610954) internal successors, (15215), 11313 states have internal predecessors, (15215), 3910 states have call successors, (3910), 1090 states have call predecessors, (3910), 1153 states have return successors, (5586), 3874 states have call predecessors, (5586), 3878 states have call successors, (5586) [2022-11-23 15:36:10,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15654 states to 15654 states and 24711 transitions. [2022-11-23 15:36:10,323 INFO L78 Accepts]: Start accepts. Automaton has 15654 states and 24711 transitions. Word has length 146 [2022-11-23 15:36:10,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:36:10,324 INFO L495 AbstractCegarLoop]: Abstraction has 15654 states and 24711 transitions. [2022-11-23 15:36:10,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 21 states have (on average 8.523809523809524) internal successors, (179), 26 states have internal predecessors, (179), 15 states have call successors, (67), 9 states have call predecessors, (67), 15 states have return successors, (66), 16 states have call predecessors, (66), 15 states have call successors, (66) [2022-11-23 15:36:10,325 INFO L276 IsEmpty]: Start isEmpty. Operand 15654 states and 24711 transitions. [2022-11-23 15:36:10,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-11-23 15:36:10,329 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:36:10,330 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:36:10,338 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4157ced1-4e63-4335-a64f-3f9b21ee947a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-11-23 15:36:10,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4157ced1-4e63-4335-a64f-3f9b21ee947a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-11-23 15:36:10,530 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:36:10,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:36:10,531 INFO L85 PathProgramCache]: Analyzing trace with hash -3062931, now seen corresponding path program 1 times [2022-11-23 15:36:10,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:36:10,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383499062] [2022-11-23 15:36:10,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:36:10,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:36:10,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:36:10,681 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-23 15:36:10,681 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:36:10,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383499062] [2022-11-23 15:36:10,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383499062] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:36:10,682 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:36:10,682 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 15:36:10,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946398212] [2022-11-23 15:36:10,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:36:10,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 15:36:10,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:36:10,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 15:36:10,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 15:36:10,683 INFO L87 Difference]: Start difference. First operand 15654 states and 24711 transitions. Second operand has 5 states, 5 states have (on average 17.4) internal successors, (87), 4 states have internal predecessors, (87), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 3 states have call predecessors, (23), 2 states have call successors, (23) [2022-11-23 15:36:12,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:36:12,562 INFO L93 Difference]: Finished difference Result 30624 states and 49568 transitions. [2022-11-23 15:36:12,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 15:36:12,563 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.4) internal successors, (87), 4 states have internal predecessors, (87), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 3 states have call predecessors, (23), 2 states have call successors, (23) Word has length 146 [2022-11-23 15:36:12,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:36:12,668 INFO L225 Difference]: With dead ends: 30624 [2022-11-23 15:36:12,668 INFO L226 Difference]: Without dead ends: 15843 [2022-11-23 15:36:12,789 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 15:36:12,789 INFO L413 NwaCegarLoop]: 561 mSDtfsCounter, 12 mSDsluCounter, 1648 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 2209 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:36:12,790 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 2209 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:36:12,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15843 states. [2022-11-23 15:36:14,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15843 to 15583. [2022-11-23 15:36:14,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15583 states, 10555 states have (on average 1.4356229275225012) internal successors, (15153), 11298 states have internal predecessors, (15153), 3852 states have call successors, (3852), 1057 states have call predecessors, (3852), 1175 states have return successors, (5497), 3851 states have call predecessors, (5497), 3822 states have call successors, (5497) [2022-11-23 15:36:14,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15583 states to 15583 states and 24502 transitions. [2022-11-23 15:36:14,346 INFO L78 Accepts]: Start accepts. Automaton has 15583 states and 24502 transitions. Word has length 146 [2022-11-23 15:36:14,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:36:14,346 INFO L495 AbstractCegarLoop]: Abstraction has 15583 states and 24502 transitions. [2022-11-23 15:36:14,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.4) internal successors, (87), 4 states have internal predecessors, (87), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 3 states have call predecessors, (23), 2 states have call successors, (23) [2022-11-23 15:36:14,347 INFO L276 IsEmpty]: Start isEmpty. Operand 15583 states and 24502 transitions. [2022-11-23 15:36:14,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2022-11-23 15:36:14,351 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:36:14,352 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:36:14,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-11-23 15:36:14,352 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:36:14,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:36:14,353 INFO L85 PathProgramCache]: Analyzing trace with hash -187259725, now seen corresponding path program 1 times [2022-11-23 15:36:14,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:36:14,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423692866] [2022-11-23 15:36:14,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:36:14,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:36:14,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:36:14,530 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-11-23 15:36:14,531 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:36:14,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423692866] [2022-11-23 15:36:14,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423692866] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:36:14,532 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:36:14,532 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 15:36:14,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102091475] [2022-11-23 15:36:14,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:36:14,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 15:36:14,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:36:14,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 15:36:14,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 15:36:14,534 INFO L87 Difference]: Start difference. First operand 15583 states and 24502 transitions. Second operand has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 3 states have call successors, (24), 3 states have call predecessors, (24), 3 states have return successors, (22), 3 states have call predecessors, (22), 3 states have call successors, (22) [2022-11-23 15:36:19,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:36:19,352 INFO L93 Difference]: Finished difference Result 54068 states and 88306 transitions. [2022-11-23 15:36:19,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 15:36:19,353 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 3 states have call successors, (24), 3 states have call predecessors, (24), 3 states have return successors, (22), 3 states have call predecessors, (22), 3 states have call successors, (22) Word has length 152 [2022-11-23 15:36:19,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:36:19,625 INFO L225 Difference]: With dead ends: 54068 [2022-11-23 15:36:19,625 INFO L226 Difference]: Without dead ends: 38460 [2022-11-23 15:36:19,812 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 15:36:19,813 INFO L413 NwaCegarLoop]: 1166 mSDtfsCounter, 1047 mSDsluCounter, 1141 mSDsCounter, 0 mSdLazyCounter, 533 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1047 SdHoareTripleChecker+Valid, 2307 SdHoareTripleChecker+Invalid, 548 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 533 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-23 15:36:19,813 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1047 Valid, 2307 Invalid, 548 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 533 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-23 15:36:19,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38460 states. [2022-11-23 15:36:23,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38460 to 30237. [2022-11-23 15:36:23,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30237 states, 20742 states have (on average 1.4325040979654806) internal successors, (29713), 22210 states have internal predecessors, (29713), 7032 states have call successors, (7032), 2277 states have call predecessors, (7032), 2462 states have return successors, (11289), 6685 states have call predecessors, (11289), 6969 states have call successors, (11289) [2022-11-23 15:36:23,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30237 states to 30237 states and 48034 transitions. [2022-11-23 15:36:23,476 INFO L78 Accepts]: Start accepts. Automaton has 30237 states and 48034 transitions. Word has length 152 [2022-11-23 15:36:23,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:36:23,476 INFO L495 AbstractCegarLoop]: Abstraction has 30237 states and 48034 transitions. [2022-11-23 15:36:23,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 3 states have call successors, (24), 3 states have call predecessors, (24), 3 states have return successors, (22), 3 states have call predecessors, (22), 3 states have call successors, (22) [2022-11-23 15:36:23,477 INFO L276 IsEmpty]: Start isEmpty. Operand 30237 states and 48034 transitions. [2022-11-23 15:36:23,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-11-23 15:36:23,482 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:36:23,482 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:36:23,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-11-23 15:36:23,483 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:36:23,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:36:23,483 INFO L85 PathProgramCache]: Analyzing trace with hash -411775234, now seen corresponding path program 1 times [2022-11-23 15:36:23,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:36:23,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164485432] [2022-11-23 15:36:23,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:36:23,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:36:23,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:36:23,788 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-11-23 15:36:23,788 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:36:23,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164485432] [2022-11-23 15:36:23,789 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164485432] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:36:23,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000682759] [2022-11-23 15:36:23,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:36:23,789 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:36:23,789 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4157ced1-4e63-4335-a64f-3f9b21ee947a/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:36:23,790 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4157ced1-4e63-4335-a64f-3f9b21ee947a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:36:23,795 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4157ced1-4e63-4335-a64f-3f9b21ee947a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-11-23 15:36:24,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:36:24,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 1743 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-23 15:36:24,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:36:24,334 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-11-23 15:36:24,334 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:36:24,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1000682759] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:36:24,334 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 15:36:24,334 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 11 [2022-11-23 15:36:24,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505652403] [2022-11-23 15:36:24,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:36:24,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 15:36:24,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:36:24,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 15:36:24,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-11-23 15:36:24,337 INFO L87 Difference]: Start difference. First operand 30237 states and 48034 transitions. Second operand has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 5 states have internal predecessors, (100), 2 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (23), 3 states have call predecessors, (23), 2 states have call successors, (23) [2022-11-23 15:36:28,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:36:28,633 INFO L93 Difference]: Finished difference Result 59154 states and 95952 transitions. [2022-11-23 15:36:28,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-23 15:36:28,634 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 5 states have internal predecessors, (100), 2 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (23), 3 states have call predecessors, (23), 2 states have call successors, (23) Word has length 156 [2022-11-23 15:36:28,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:36:28,854 INFO L225 Difference]: With dead ends: 59154 [2022-11-23 15:36:28,854 INFO L226 Difference]: Without dead ends: 30498 [2022-11-23 15:36:29,359 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2022-11-23 15:36:29,359 INFO L413 NwaCegarLoop]: 689 mSDtfsCounter, 472 mSDsluCounter, 2330 mSDsCounter, 0 mSdLazyCounter, 628 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 476 SdHoareTripleChecker+Valid, 3019 SdHoareTripleChecker+Invalid, 637 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 628 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-23 15:36:29,359 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [476 Valid, 3019 Invalid, 637 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 628 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-23 15:36:29,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30498 states. [2022-11-23 15:36:32,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30498 to 30203. [2022-11-23 15:36:32,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30203 states, 20722 states have (on average 1.4326319853296015) internal successors, (29687), 22187 states have internal predecessors, (29687), 7025 states have call successors, (7025), 2273 states have call predecessors, (7025), 2455 states have return successors, (11287), 6678 states have call predecessors, (11287), 6962 states have call successors, (11287) [2022-11-23 15:36:32,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30203 states to 30203 states and 47999 transitions. [2022-11-23 15:36:32,581 INFO L78 Accepts]: Start accepts. Automaton has 30203 states and 47999 transitions. Word has length 156 [2022-11-23 15:36:32,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:36:32,582 INFO L495 AbstractCegarLoop]: Abstraction has 30203 states and 47999 transitions. [2022-11-23 15:36:32,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 5 states have internal predecessors, (100), 2 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (23), 3 states have call predecessors, (23), 2 states have call successors, (23) [2022-11-23 15:36:32,583 INFO L276 IsEmpty]: Start isEmpty. Operand 30203 states and 47999 transitions. [2022-11-23 15:36:32,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2022-11-23 15:36:32,592 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:36:32,593 INFO L195 NwaCegarLoop]: trace histogram [7, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:36:32,605 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4157ced1-4e63-4335-a64f-3f9b21ee947a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-11-23 15:36:32,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4157ced1-4e63-4335-a64f-3f9b21ee947a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-11-23 15:36:32,801 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:36:32,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:36:32,802 INFO L85 PathProgramCache]: Analyzing trace with hash 1098707613, now seen corresponding path program 1 times [2022-11-23 15:36:32,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:36:32,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435605361] [2022-11-23 15:36:32,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:36:32,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:36:32,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:36:33,164 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 17 proven. 1 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-11-23 15:36:33,164 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:36:33,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435605361] [2022-11-23 15:36:33,165 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435605361] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:36:33,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [507788154] [2022-11-23 15:36:33,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:36:33,165 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:36:33,166 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4157ced1-4e63-4335-a64f-3f9b21ee947a/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:36:33,167 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4157ced1-4e63-4335-a64f-3f9b21ee947a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:36:33,180 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4157ced1-4e63-4335-a64f-3f9b21ee947a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-11-23 15:36:33,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:36:33,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 1756 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-23 15:36:33,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:36:33,785 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 49 proven. 1 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-23 15:36:33,785 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:36:34,388 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2022-11-23 15:36:34,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [507788154] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:36:34,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [360002417] [2022-11-23 15:36:34,391 INFO L159 IcfgInterpreter]: Started Sifa with 120 locations of interest [2022-11-23 15:36:34,392 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:36:34,392 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:36:34,393 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:36:34,393 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:36:38,630 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 572 for LOIs [2022-11-23 15:36:45,878 INFO L197 IcfgInterpreter]: Interpreting procedure buttonForFloorIsPressed with input of size 60 for LOIs [2022-11-23 15:36:45,891 INFO L197 IcfgInterpreter]: Interpreting procedure initTopDown with input of size 599 for LOIs [2022-11-23 15:36:47,879 INFO L197 IcfgInterpreter]: Interpreting procedure initFloors with input of size 573 for LOIs [2022-11-23 15:36:48,069 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentHeading with input of size 437 for LOIs [2022-11-23 15:36:48,136 INFO L197 IcfgInterpreter]: Interpreting procedure bobCall with input of size 573 for LOIs [2022-11-23 15:36:51,382 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 577 for LOIs [2022-11-23 15:36:51,951 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 505 for LOIs [2022-11-23 15:36:52,085 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:37:25,324 WARN L233 SmtUtils]: Spent 7.08s on a formula simplification. DAG size of input: 645 DAG size of output: 592 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:37:32,771 WARN L233 SmtUtils]: Spent 7.11s on a formula simplification. DAG size of input: 645 DAG size of output: 592 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)