./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec2_product29.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b5237d83 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_4cd9fe60-422b-4413-9743-302bbba75048/bin/utaipan-g80aRyZoba/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cd9fe60-422b-4413-9743-302bbba75048/bin/utaipan-g80aRyZoba/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cd9fe60-422b-4413-9743-302bbba75048/bin/utaipan-g80aRyZoba/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cd9fe60-422b-4413-9743-302bbba75048/bin/utaipan-g80aRyZoba/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec2_product29.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cd9fe60-422b-4413-9743-302bbba75048/bin/utaipan-g80aRyZoba/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cd9fe60-422b-4413-9743-302bbba75048/bin/utaipan-g80aRyZoba --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 a9d4bfafe2ee2b10c7451875462462bdbc63aaee25e1868c3faa4756fb5ebfc5 --- 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-b5237d8 [2022-11-22 02:45:56,815 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-22 02:45:56,817 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-22 02:45:56,852 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-22 02:45:56,852 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-22 02:45:56,853 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-22 02:45:56,859 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-22 02:45:56,863 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-22 02:45:56,865 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-22 02:45:56,871 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-22 02:45:56,873 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-22 02:45:56,875 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-22 02:45:56,876 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-22 02:45:56,878 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-22 02:45:56,881 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-22 02:45:56,883 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-22 02:45:56,885 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-22 02:45:56,886 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-22 02:45:56,887 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-22 02:45:56,894 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-22 02:45:56,896 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-22 02:45:56,898 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-22 02:45:56,900 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-22 02:45:56,901 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-22 02:45:56,912 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-22 02:45:56,912 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-22 02:45:56,912 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-22 02:45:56,914 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-22 02:45:56,915 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-22 02:45:56,915 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-22 02:45:56,916 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-22 02:45:56,917 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-22 02:45:56,918 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-22 02:45:56,920 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-22 02:45:56,921 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-22 02:45:56,921 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-22 02:45:56,922 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-22 02:45:56,922 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-22 02:45:56,922 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-22 02:45:56,924 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-22 02:45:56,925 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-22 02:45:56,926 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cd9fe60-422b-4413-9743-302bbba75048/bin/utaipan-g80aRyZoba/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-22 02:45:56,967 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-22 02:45:56,968 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-22 02:45:56,968 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-22 02:45:56,968 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-22 02:45:56,969 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-22 02:45:56,970 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-22 02:45:56,970 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-22 02:45:56,970 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-22 02:45:56,970 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-22 02:45:56,970 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-22 02:45:56,971 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-22 02:45:56,972 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-22 02:45:56,972 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-22 02:45:56,972 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-22 02:45:56,972 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-22 02:45:56,973 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-22 02:45:56,973 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-22 02:45:56,973 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-22 02:45:56,974 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-22 02:45:56,974 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-22 02:45:56,974 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-22 02:45:56,974 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-22 02:45:56,975 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-22 02:45:56,975 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-22 02:45:56,975 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-22 02:45:56,975 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-22 02:45:56,975 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-22 02:45:56,976 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-22 02:45:56,976 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-22 02:45:56,976 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-22 02:45:56,976 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-22 02:45:56,977 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-22 02:45:56,977 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 02:45:56,977 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-22 02:45:56,977 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-22 02:45:56,977 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-22 02:45:56,978 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-22 02:45:56,978 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-22 02:45:56,978 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-22 02:45:56,978 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-22 02:45:56,978 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-22 02:45:56,980 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_4cd9fe60-422b-4413-9743-302bbba75048/bin/utaipan-g80aRyZoba/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cd9fe60-422b-4413-9743-302bbba75048/bin/utaipan-g80aRyZoba Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a9d4bfafe2ee2b10c7451875462462bdbc63aaee25e1868c3faa4756fb5ebfc5 [2022-11-22 02:45:57,294 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-22 02:45:57,325 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-22 02:45:57,328 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-22 02:45:57,329 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-22 02:45:57,330 INFO L275 PluginConnector]: CDTParser initialized [2022-11-22 02:45:57,331 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cd9fe60-422b-4413-9743-302bbba75048/bin/utaipan-g80aRyZoba/../../sv-benchmarks/c/product-lines/elevator_spec2_product29.cil.c [2022-11-22 02:46:00,413 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-22 02:46:00,835 INFO L351 CDTParser]: Found 1 translation units. [2022-11-22 02:46:00,836 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cd9fe60-422b-4413-9743-302bbba75048/sv-benchmarks/c/product-lines/elevator_spec2_product29.cil.c [2022-11-22 02:46:00,861 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cd9fe60-422b-4413-9743-302bbba75048/bin/utaipan-g80aRyZoba/data/55fb1bd8e/269a8060719e449ea821426163357fb9/FLAGfb3b79e12 [2022-11-22 02:46:00,879 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cd9fe60-422b-4413-9743-302bbba75048/bin/utaipan-g80aRyZoba/data/55fb1bd8e/269a8060719e449ea821426163357fb9 [2022-11-22 02:46:00,881 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-22 02:46:00,883 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-22 02:46:00,887 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-22 02:46:00,887 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-22 02:46:00,891 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-22 02:46:00,892 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 02:46:00" (1/1) ... [2022-11-22 02:46:00,893 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1e37362f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:46:00, skipping insertion in model container [2022-11-22 02:46:00,894 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 02:46:00" (1/1) ... [2022-11-22 02:46:00,901 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-22 02:46:00,986 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-22 02:46:01,314 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_4cd9fe60-422b-4413-9743-302bbba75048/sv-benchmarks/c/product-lines/elevator_spec2_product29.cil.c[17414,17427] [2022-11-22 02:46:01,728 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 02:46:01,751 INFO L203 MainTranslator]: Completed pre-run [2022-11-22 02:46:01,813 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_4cd9fe60-422b-4413-9743-302bbba75048/sv-benchmarks/c/product-lines/elevator_spec2_product29.cil.c[17414,17427] [2022-11-22 02:46:01,972 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 02:46:01,998 INFO L208 MainTranslator]: Completed translation [2022-11-22 02:46:01,998 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:46:01 WrapperNode [2022-11-22 02:46:01,998 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-22 02:46:02,000 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-22 02:46:02,000 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-22 02:46:02,000 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-22 02:46:02,008 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:46:01" (1/1) ... [2022-11-22 02:46:02,048 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:46:01" (1/1) ... [2022-11-22 02:46:02,100 INFO L138 Inliner]: procedures = 93, calls = 341, calls flagged for inlining = 27, calls inlined = 24, statements flattened = 905 [2022-11-22 02:46:02,101 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-22 02:46:02,101 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-22 02:46:02,102 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-22 02:46:02,102 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-22 02:46:02,110 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:46:01" (1/1) ... [2022-11-22 02:46:02,111 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:46:01" (1/1) ... [2022-11-22 02:46:02,118 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:46:01" (1/1) ... [2022-11-22 02:46:02,118 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:46:01" (1/1) ... [2022-11-22 02:46:02,137 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:46:01" (1/1) ... [2022-11-22 02:46:02,152 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:46:01" (1/1) ... [2022-11-22 02:46:02,157 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:46:01" (1/1) ... [2022-11-22 02:46:02,162 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:46:01" (1/1) ... [2022-11-22 02:46:02,171 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-22 02:46:02,172 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-22 02:46:02,172 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-22 02:46:02,172 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-22 02:46:02,173 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:46:01" (1/1) ... [2022-11-22 02:46:02,180 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 02:46:02,192 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cd9fe60-422b-4413-9743-302bbba75048/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:46:02,240 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cd9fe60-422b-4413-9743-302bbba75048/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-22 02:46:02,267 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cd9fe60-422b-4413-9743-302bbba75048/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-22 02:46:02,291 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-22 02:46:02,292 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2022-11-22 02:46:02,292 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2022-11-22 02:46:02,292 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2022-11-22 02:46:02,292 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2022-11-22 02:46:02,293 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2022-11-22 02:46:02,293 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2022-11-22 02:46:02,293 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2022-11-22 02:46:02,293 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2022-11-22 02:46:02,293 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2022-11-22 02:46:02,294 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2022-11-22 02:46:02,294 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__empty [2022-11-22 02:46:02,294 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__empty [2022-11-22 02:46:02,294 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2022-11-22 02:46:02,294 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2022-11-22 02:46:02,295 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2022-11-22 02:46:02,295 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2022-11-22 02:46:02,295 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2022-11-22 02:46:02,295 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2022-11-22 02:46:02,295 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2022-11-22 02:46:02,296 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2022-11-22 02:46:02,296 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2022-11-22 02:46:02,297 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2022-11-22 02:46:02,297 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2022-11-22 02:46:02,297 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2022-11-22 02:46:02,298 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2022-11-22 02:46:02,298 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2022-11-22 02:46:02,299 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2022-11-22 02:46:02,299 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2022-11-22 02:46:02,299 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2022-11-22 02:46:02,300 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2022-11-22 02:46:02,301 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2022-11-22 02:46:02,301 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2022-11-22 02:46:02,301 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2022-11-22 02:46:02,301 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2022-11-22 02:46:02,301 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2022-11-22 02:46:02,302 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2022-11-22 02:46:02,302 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2022-11-22 02:46:02,302 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2022-11-22 02:46:02,302 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-22 02:46:02,302 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2022-11-22 02:46:02,302 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2022-11-22 02:46:02,303 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2022-11-22 02:46:02,303 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2022-11-22 02:46:02,303 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2022-11-22 02:46:02,304 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2022-11-22 02:46:02,304 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2022-11-22 02:46:02,305 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2022-11-22 02:46:02,305 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-22 02:46:02,305 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-22 02:46:02,305 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2022-11-22 02:46:02,305 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2022-11-22 02:46:02,517 INFO L235 CfgBuilder]: Building ICFG [2022-11-22 02:46:02,520 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-22 02:46:03,960 INFO L276 CfgBuilder]: Performing block encoding [2022-11-22 02:46:04,826 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-22 02:46:04,826 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-22 02:46:04,831 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 02:46:04 BoogieIcfgContainer [2022-11-22 02:46:04,831 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-22 02:46:04,834 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-22 02:46:04,834 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-22 02:46:04,837 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-22 02:46:04,838 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 02:46:00" (1/3) ... [2022-11-22 02:46:04,840 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8997abd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 02:46:04, skipping insertion in model container [2022-11-22 02:46:04,840 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:46:01" (2/3) ... [2022-11-22 02:46:04,841 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8997abd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 02:46:04, skipping insertion in model container [2022-11-22 02:46:04,842 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 02:46:04" (3/3) ... [2022-11-22 02:46:04,843 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec2_product29.cil.c [2022-11-22 02:46:04,863 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-22 02:46:04,863 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-22 02:46:04,939 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-22 02:46:04,947 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;@6bb257d5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-22 02:46:04,947 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-22 02:46:04,955 INFO L276 IsEmpty]: Start isEmpty. Operand has 374 states, 253 states have (on average 1.5968379446640317) internal successors, (404), 274 states have internal predecessors, (404), 95 states have call successors, (95), 24 states have call predecessors, (95), 24 states have return successors, (95), 89 states have call predecessors, (95), 95 states have call successors, (95) [2022-11-22 02:46:04,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-11-22 02:46:04,997 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:46:04,997 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:46:04,998 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:46:05,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:46:05,006 INFO L85 PathProgramCache]: Analyzing trace with hash -847922989, now seen corresponding path program 1 times [2022-11-22 02:46:05,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:46:05,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935824147] [2022-11-22 02:46:05,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:46:05,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:46:05,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:46:05,897 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:46:05,897 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:46:05,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935824147] [2022-11-22 02:46:05,898 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935824147] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:46:05,899 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:46:05,899 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-22 02:46:05,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820711289] [2022-11-22 02:46:05,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:46:05,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 02:46:05,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:46:05,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 02:46:05,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-22 02:46:05,953 INFO L87 Difference]: Start difference. First operand has 374 states, 253 states have (on average 1.5968379446640317) internal successors, (404), 274 states have internal predecessors, (404), 95 states have call successors, (95), 24 states have call predecessors, (95), 24 states have return successors, (95), 89 states have call predecessors, (95), 95 states have call successors, (95) Second operand has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-22 02:46:06,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:46:06,583 INFO L93 Difference]: Finished difference Result 844 states and 1368 transitions. [2022-11-22 02:46:06,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 02:46:06,585 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 65 [2022-11-22 02:46:06,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:46:06,601 INFO L225 Difference]: With dead ends: 844 [2022-11-22 02:46:06,602 INFO L226 Difference]: Without dead ends: 483 [2022-11-22 02:46:06,609 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-22 02:46:06,612 INFO L413 NwaCegarLoop]: 646 mSDtfsCounter, 282 mSDsluCounter, 1669 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 2315 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-22 02:46:06,613 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [282 Valid, 2315 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-22 02:46:06,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2022-11-22 02:46:06,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 373. [2022-11-22 02:46:06,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 373 states, 254 states have (on average 1.578740157480315) internal successors, (401), 273 states have internal predecessors, (401), 95 states have call successors, (95), 24 states have call predecessors, (95), 23 states have return successors, (90), 88 states have call predecessors, (90), 90 states have call successors, (90) [2022-11-22 02:46:06,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 373 states to 373 states and 586 transitions. [2022-11-22 02:46:06,691 INFO L78 Accepts]: Start accepts. Automaton has 373 states and 586 transitions. Word has length 65 [2022-11-22 02:46:06,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:46:06,692 INFO L495 AbstractCegarLoop]: Abstraction has 373 states and 586 transitions. [2022-11-22 02:46:06,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-22 02:46:06,693 INFO L276 IsEmpty]: Start isEmpty. Operand 373 states and 586 transitions. [2022-11-22 02:46:06,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-22 02:46:06,697 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:46:06,697 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:46:06,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-22 02:46:06,698 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:46:06,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:46:06,699 INFO L85 PathProgramCache]: Analyzing trace with hash 249604261, now seen corresponding path program 1 times [2022-11-22 02:46:06,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:46:06,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542403713] [2022-11-22 02:46:06,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:46:06,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:46:06,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:46:07,237 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 02:46:07,238 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:46:07,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542403713] [2022-11-22 02:46:07,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542403713] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:46:07,240 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:46:07,240 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-22 02:46:07,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597860073] [2022-11-22 02:46:07,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:46:07,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-22 02:46:07,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:46:07,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-22 02:46:07,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-22 02:46:07,244 INFO L87 Difference]: Start difference. First operand 373 states and 586 transitions. Second operand has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 9 states have internal predecessors, (44), 6 states have call successors, (12), 3 states have call predecessors, (12), 4 states have return successors, (11), 6 states have call predecessors, (11), 5 states have call successors, (11) [2022-11-22 02:46:11,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:46:11,037 INFO L93 Difference]: Finished difference Result 1280 states and 2045 transitions. [2022-11-22 02:46:11,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-22 02:46:11,038 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 9 states have internal predecessors, (44), 6 states have call successors, (12), 3 states have call predecessors, (12), 4 states have return successors, (11), 6 states have call predecessors, (11), 5 states have call successors, (11) Word has length 68 [2022-11-22 02:46:11,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:46:11,045 INFO L225 Difference]: With dead ends: 1280 [2022-11-22 02:46:11,045 INFO L226 Difference]: Without dead ends: 923 [2022-11-22 02:46:11,047 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=115, Invalid=437, Unknown=0, NotChecked=0, Total=552 [2022-11-22 02:46:11,049 INFO L413 NwaCegarLoop]: 397 mSDtfsCounter, 1733 mSDsluCounter, 2128 mSDsCounter, 0 mSdLazyCounter, 3931 mSolverCounterSat, 584 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1798 SdHoareTripleChecker+Valid, 2525 SdHoareTripleChecker+Invalid, 4515 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 584 IncrementalHoareTripleChecker+Valid, 3931 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-11-22 02:46:11,049 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1798 Valid, 2525 Invalid, 4515 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [584 Valid, 3931 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-11-22 02:46:11,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 923 states. [2022-11-22 02:46:11,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 923 to 867. [2022-11-22 02:46:11,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 867 states, 611 states have (on average 1.5973813420621932) internal successors, (976), 642 states have internal predecessors, (976), 203 states have call successors, (203), 48 states have call predecessors, (203), 52 states have return successors, (210), 201 states have call predecessors, (210), 198 states have call successors, (210) [2022-11-22 02:46:11,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 867 states to 867 states and 1389 transitions. [2022-11-22 02:46:11,153 INFO L78 Accepts]: Start accepts. Automaton has 867 states and 1389 transitions. Word has length 68 [2022-11-22 02:46:11,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:46:11,155 INFO L495 AbstractCegarLoop]: Abstraction has 867 states and 1389 transitions. [2022-11-22 02:46:11,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 9 states have internal predecessors, (44), 6 states have call successors, (12), 3 states have call predecessors, (12), 4 states have return successors, (11), 6 states have call predecessors, (11), 5 states have call successors, (11) [2022-11-22 02:46:11,156 INFO L276 IsEmpty]: Start isEmpty. Operand 867 states and 1389 transitions. [2022-11-22 02:46:11,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-22 02:46:11,163 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:46:11,164 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:46:11,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-22 02:46:11,164 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:46:11,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:46:11,174 INFO L85 PathProgramCache]: Analyzing trace with hash -1662862818, now seen corresponding path program 1 times [2022-11-22 02:46:11,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:46:11,174 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715427015] [2022-11-22 02:46:11,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:46:11,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:46:11,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:46:12,481 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 02:46:12,482 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:46:12,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715427015] [2022-11-22 02:46:12,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715427015] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:46:12,484 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:46:12,484 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-22 02:46:12,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873632627] [2022-11-22 02:46:12,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:46:12,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-22 02:46:12,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:46:12,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-22 02:46:12,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-22 02:46:12,487 INFO L87 Difference]: Start difference. First operand 867 states and 1389 transitions. Second operand has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 6 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) [2022-11-22 02:46:17,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:46:17,289 INFO L93 Difference]: Finished difference Result 3774 states and 6176 transitions. [2022-11-22 02:46:17,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-22 02:46:17,291 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 6 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) Word has length 73 [2022-11-22 02:46:17,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:46:17,311 INFO L225 Difference]: With dead ends: 3774 [2022-11-22 02:46:17,311 INFO L226 Difference]: Without dead ends: 2924 [2022-11-22 02:46:17,316 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2022-11-22 02:46:17,317 INFO L413 NwaCegarLoop]: 556 mSDtfsCounter, 2606 mSDsluCounter, 1087 mSDsCounter, 0 mSdLazyCounter, 2882 mSolverCounterSat, 1174 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2713 SdHoareTripleChecker+Valid, 1643 SdHoareTripleChecker+Invalid, 4056 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1174 IncrementalHoareTripleChecker+Valid, 2882 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:46:17,317 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2713 Valid, 1643 Invalid, 4056 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1174 Valid, 2882 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2022-11-22 02:46:17,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2924 states. [2022-11-22 02:46:17,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2924 to 2652. [2022-11-22 02:46:17,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2652 states, 1862 states have (on average 1.5918367346938775) internal successors, (2964), 1975 states have internal predecessors, (2964), 645 states have call successors, (645), 128 states have call predecessors, (645), 144 states have return successors, (696), 619 states have call predecessors, (696), 640 states have call successors, (696) [2022-11-22 02:46:17,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2652 states to 2652 states and 4305 transitions. [2022-11-22 02:46:17,641 INFO L78 Accepts]: Start accepts. Automaton has 2652 states and 4305 transitions. Word has length 73 [2022-11-22 02:46:17,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:46:17,642 INFO L495 AbstractCegarLoop]: Abstraction has 2652 states and 4305 transitions. [2022-11-22 02:46:17,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 6 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) [2022-11-22 02:46:17,642 INFO L276 IsEmpty]: Start isEmpty. Operand 2652 states and 4305 transitions. [2022-11-22 02:46:17,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-11-22 02:46:17,646 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:46:17,646 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:46:17,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-22 02:46:17,647 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:46:17,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:46:17,647 INFO L85 PathProgramCache]: Analyzing trace with hash -2120546044, now seen corresponding path program 1 times [2022-11-22 02:46:17,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:46:17,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825341821] [2022-11-22 02:46:17,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:46:17,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:46:17,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:46:17,904 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 02:46:17,904 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:46:17,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825341821] [2022-11-22 02:46:17,905 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825341821] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:46:17,905 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:46:17,905 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-22 02:46:17,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096500523] [2022-11-22 02:46:17,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:46:17,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-22 02:46:17,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:46:17,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-22 02:46:17,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-22 02:46:17,907 INFO L87 Difference]: Start difference. First operand 2652 states and 4305 transitions. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 5 states have internal predecessors, (46), 2 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (12), 4 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-22 02:46:18,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:46:18,468 INFO L93 Difference]: Finished difference Result 4528 states and 7355 transitions. [2022-11-22 02:46:18,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-22 02:46:18,468 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 5 states have internal predecessors, (46), 2 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (12), 4 states have call predecessors, (12), 2 states have call successors, (12) Word has length 72 [2022-11-22 02:46:18,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:46:18,489 INFO L225 Difference]: With dead ends: 4528 [2022-11-22 02:46:18,489 INFO L226 Difference]: Without dead ends: 2919 [2022-11-22 02:46:18,498 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-22 02:46:18,499 INFO L413 NwaCegarLoop]: 593 mSDtfsCounter, 42 mSDsluCounter, 2886 mSDsCounter, 0 mSdLazyCounter, 264 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 3479 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 02:46:18,499 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 3479 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 264 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 02:46:18,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2919 states. [2022-11-22 02:46:18,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2919 to 2725. [2022-11-22 02:46:18,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2725 states, 1913 states have (on average 1.5760585467851542) internal successors, (3015), 2028 states have internal predecessors, (3015), 645 states have call successors, (645), 128 states have call predecessors, (645), 166 states have return successors, (743), 639 states have call predecessors, (743), 640 states have call successors, (743) [2022-11-22 02:46:18,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2725 states to 2725 states and 4403 transitions. [2022-11-22 02:46:18,812 INFO L78 Accepts]: Start accepts. Automaton has 2725 states and 4403 transitions. Word has length 72 [2022-11-22 02:46:18,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:46:18,813 INFO L495 AbstractCegarLoop]: Abstraction has 2725 states and 4403 transitions. [2022-11-22 02:46:18,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 5 states have internal predecessors, (46), 2 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (12), 4 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-22 02:46:18,813 INFO L276 IsEmpty]: Start isEmpty. Operand 2725 states and 4403 transitions. [2022-11-22 02:46:18,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-22 02:46:18,816 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:46:18,816 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:46:18,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-22 02:46:18,817 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:46:18,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:46:18,817 INFO L85 PathProgramCache]: Analyzing trace with hash 460163070, now seen corresponding path program 1 times [2022-11-22 02:46:18,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:46:18,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263863520] [2022-11-22 02:46:18,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:46:18,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:46:18,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:46:19,060 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 02:46:19,060 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:46:19,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263863520] [2022-11-22 02:46:19,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263863520] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:46:19,061 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:46:19,061 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-22 02:46:19,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106264737] [2022-11-22 02:46:19,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:46:19,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-22 02:46:19,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:46:19,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-22 02:46:19,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-22 02:46:19,064 INFO L87 Difference]: Start difference. First operand 2725 states and 4403 transitions. Second operand has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (12), 4 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-22 02:46:19,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:46:19,570 INFO L93 Difference]: Finished difference Result 4626 states and 7478 transitions. [2022-11-22 02:46:19,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-22 02:46:19,571 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (12), 4 states have call predecessors, (12), 2 states have call successors, (12) Word has length 73 [2022-11-22 02:46:19,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:46:19,590 INFO L225 Difference]: With dead ends: 4626 [2022-11-22 02:46:19,591 INFO L226 Difference]: Without dead ends: 2970 [2022-11-22 02:46:19,598 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-22 02:46:19,602 INFO L413 NwaCegarLoop]: 597 mSDtfsCounter, 41 mSDsluCounter, 2901 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 3498 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 02:46:19,603 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 3498 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 02:46:19,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2970 states. [2022-11-22 02:46:19,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2970 to 2736. [2022-11-22 02:46:19,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2736 states, 1924 states have (on average 1.5727650727650728) internal successors, (3026), 2028 states have internal predecessors, (3026), 645 states have call successors, (645), 128 states have call predecessors, (645), 166 states have return successors, (743), 650 states have call predecessors, (743), 640 states have call successors, (743) [2022-11-22 02:46:19,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2736 states to 2736 states and 4414 transitions. [2022-11-22 02:46:19,896 INFO L78 Accepts]: Start accepts. Automaton has 2736 states and 4414 transitions. Word has length 73 [2022-11-22 02:46:19,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:46:19,898 INFO L495 AbstractCegarLoop]: Abstraction has 2736 states and 4414 transitions. [2022-11-22 02:46:19,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (12), 4 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-22 02:46:19,898 INFO L276 IsEmpty]: Start isEmpty. Operand 2736 states and 4414 transitions. [2022-11-22 02:46:19,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-11-22 02:46:19,901 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:46:19,902 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:46:19,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-22 02:46:19,902 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:46:19,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:46:19,903 INFO L85 PathProgramCache]: Analyzing trace with hash -407194107, now seen corresponding path program 1 times [2022-11-22 02:46:19,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:46:19,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8780659] [2022-11-22 02:46:19,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:46:19,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:46:19,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:46:20,240 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 02:46:20,241 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:46:20,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8780659] [2022-11-22 02:46:20,241 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8780659] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:46:20,241 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:46:20,242 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-22 02:46:20,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277323444] [2022-11-22 02:46:20,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:46:20,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-22 02:46:20,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:46:20,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-22 02:46:20,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-11-22 02:46:20,243 INFO L87 Difference]: Start difference. First operand 2736 states and 4414 transitions. Second operand has 8 states, 8 states have (on average 6.375) internal successors, (51), 8 states have internal predecessors, (51), 8 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (13), 7 states have call predecessors, (13), 7 states have call successors, (13) [2022-11-22 02:46:23,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:46:23,414 INFO L93 Difference]: Finished difference Result 6186 states and 10031 transitions. [2022-11-22 02:46:23,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-22 02:46:23,415 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.375) internal successors, (51), 8 states have internal predecessors, (51), 8 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (13), 7 states have call predecessors, (13), 7 states have call successors, (13) Word has length 79 [2022-11-22 02:46:23,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:46:23,446 INFO L225 Difference]: With dead ends: 6186 [2022-11-22 02:46:23,446 INFO L226 Difference]: Without dead ends: 4163 [2022-11-22 02:46:23,462 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-11-22 02:46:23,464 INFO L413 NwaCegarLoop]: 527 mSDtfsCounter, 1955 mSDsluCounter, 913 mSDsCounter, 0 mSdLazyCounter, 2711 mSolverCounterSat, 815 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2119 SdHoareTripleChecker+Valid, 1440 SdHoareTripleChecker+Invalid, 3526 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 815 IncrementalHoareTripleChecker+Valid, 2711 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-22 02:46:23,465 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2119 Valid, 1440 Invalid, 3526 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [815 Valid, 2711 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-11-22 02:46:23,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4163 states. [2022-11-22 02:46:23,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4163 to 3987. [2022-11-22 02:46:23,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3987 states, 2754 states have (on average 1.532316630355846) internal successors, (4220), 2918 states have internal predecessors, (4220), 970 states have call successors, (970), 210 states have call predecessors, (970), 262 states have return successors, (1138), 964 states have call predecessors, (1138), 965 states have call successors, (1138) [2022-11-22 02:46:23,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3987 states to 3987 states and 6328 transitions. [2022-11-22 02:46:23,959 INFO L78 Accepts]: Start accepts. Automaton has 3987 states and 6328 transitions. Word has length 79 [2022-11-22 02:46:23,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:46:23,959 INFO L495 AbstractCegarLoop]: Abstraction has 3987 states and 6328 transitions. [2022-11-22 02:46:23,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.375) internal successors, (51), 8 states have internal predecessors, (51), 8 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (13), 7 states have call predecessors, (13), 7 states have call successors, (13) [2022-11-22 02:46:23,960 INFO L276 IsEmpty]: Start isEmpty. Operand 3987 states and 6328 transitions. [2022-11-22 02:46:23,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-11-22 02:46:23,968 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:46:23,968 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:46:23,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-22 02:46:23,969 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:46:23,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:46:23,969 INFO L85 PathProgramCache]: Analyzing trace with hash -403940076, now seen corresponding path program 1 times [2022-11-22 02:46:23,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:46:23,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081935183] [2022-11-22 02:46:23,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:46:23,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:46:24,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:46:24,301 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 02:46:24,301 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:46:24,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081935183] [2022-11-22 02:46:24,301 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081935183] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:46:24,302 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:46:24,302 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-22 02:46:24,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191578748] [2022-11-22 02:46:24,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:46:24,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-22 02:46:24,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:46:24,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-22 02:46:24,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-22 02:46:24,304 INFO L87 Difference]: Start difference. First operand 3987 states and 6328 transitions. Second operand has 7 states, 7 states have (on average 7.714285714285714) internal successors, (54), 7 states have internal predecessors, (54), 5 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2022-11-22 02:46:26,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:46:26,840 INFO L93 Difference]: Finished difference Result 7540 states and 12021 transitions. [2022-11-22 02:46:26,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-22 02:46:26,843 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.714285714285714) internal successors, (54), 7 states have internal predecessors, (54), 5 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) Word has length 82 [2022-11-22 02:46:26,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:46:26,869 INFO L225 Difference]: With dead ends: 7540 [2022-11-22 02:46:26,870 INFO L226 Difference]: Without dead ends: 4493 [2022-11-22 02:46:26,883 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-11-22 02:46:26,884 INFO L413 NwaCegarLoop]: 377 mSDtfsCounter, 991 mSDsluCounter, 1233 mSDsCounter, 0 mSdLazyCounter, 2468 mSolverCounterSat, 392 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1067 SdHoareTripleChecker+Valid, 1610 SdHoareTripleChecker+Invalid, 2860 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 392 IncrementalHoareTripleChecker+Valid, 2468 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-11-22 02:46:26,885 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1067 Valid, 1610 Invalid, 2860 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [392 Valid, 2468 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-11-22 02:46:26,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4493 states. [2022-11-22 02:46:27,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4493 to 4068. [2022-11-22 02:46:27,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4068 states, 2808 states have (on average 1.5263532763532763) internal successors, (4286), 2984 states have internal predecessors, (4286), 973 states have call successors, (973), 225 states have call predecessors, (973), 286 states have return successors, (1172), 964 states have call predecessors, (1172), 968 states have call successors, (1172) [2022-11-22 02:46:27,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4068 states to 4068 states and 6431 transitions. [2022-11-22 02:46:27,442 INFO L78 Accepts]: Start accepts. Automaton has 4068 states and 6431 transitions. Word has length 82 [2022-11-22 02:46:27,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:46:27,442 INFO L495 AbstractCegarLoop]: Abstraction has 4068 states and 6431 transitions. [2022-11-22 02:46:27,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.714285714285714) internal successors, (54), 7 states have internal predecessors, (54), 5 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2022-11-22 02:46:27,443 INFO L276 IsEmpty]: Start isEmpty. Operand 4068 states and 6431 transitions. [2022-11-22 02:46:27,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-11-22 02:46:27,446 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:46:27,446 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:46:27,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-22 02:46:27,447 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:46:27,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:46:27,448 INFO L85 PathProgramCache]: Analyzing trace with hash -1278460408, now seen corresponding path program 1 times [2022-11-22 02:46:27,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:46:27,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558919464] [2022-11-22 02:46:27,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:46:27,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:46:27,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:46:27,714 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-22 02:46:27,715 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:46:27,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558919464] [2022-11-22 02:46:27,715 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558919464] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:46:27,715 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:46:27,715 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-22 02:46:27,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990642963] [2022-11-22 02:46:27,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:46:27,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-22 02:46:27,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:46:27,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-22 02:46:27,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-22 02:46:27,717 INFO L87 Difference]: Start difference. First operand 4068 states and 6431 transitions. Second operand has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-22 02:46:28,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:46:28,738 INFO L93 Difference]: Finished difference Result 4172 states and 6593 transitions. [2022-11-22 02:46:28,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 02:46:28,739 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) Word has length 86 [2022-11-22 02:46:28,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:46:28,766 INFO L225 Difference]: With dead ends: 4172 [2022-11-22 02:46:28,766 INFO L226 Difference]: Without dead ends: 4157 [2022-11-22 02:46:28,769 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-11-22 02:46:28,770 INFO L413 NwaCegarLoop]: 546 mSDtfsCounter, 677 mSDsluCounter, 1262 mSDsCounter, 0 mSdLazyCounter, 537 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 678 SdHoareTripleChecker+Valid, 1808 SdHoareTripleChecker+Invalid, 559 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 537 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-22 02:46:28,770 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [678 Valid, 1808 Invalid, 559 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 537 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-22 02:46:28,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4157 states. [2022-11-22 02:46:29,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4157 to 4074. [2022-11-22 02:46:29,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4074 states, 2814 states have (on average 1.5252309879175552) internal successors, (4292), 2990 states have internal predecessors, (4292), 973 states have call successors, (973), 225 states have call predecessors, (973), 286 states have return successors, (1172), 964 states have call predecessors, (1172), 968 states have call successors, (1172) [2022-11-22 02:46:29,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4074 states to 4074 states and 6437 transitions. [2022-11-22 02:46:29,278 INFO L78 Accepts]: Start accepts. Automaton has 4074 states and 6437 transitions. Word has length 86 [2022-11-22 02:46:29,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:46:29,279 INFO L495 AbstractCegarLoop]: Abstraction has 4074 states and 6437 transitions. [2022-11-22 02:46:29,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-22 02:46:29,280 INFO L276 IsEmpty]: Start isEmpty. Operand 4074 states and 6437 transitions. [2022-11-22 02:46:29,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-11-22 02:46:29,282 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:46:29,283 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:46:29,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-22 02:46:29,283 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:46:29,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:46:29,284 INFO L85 PathProgramCache]: Analyzing trace with hash 1192687189, now seen corresponding path program 1 times [2022-11-22 02:46:29,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:46:29,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195600546] [2022-11-22 02:46:29,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:46:29,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:46:29,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:46:30,246 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-22 02:46:30,247 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:46:30,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195600546] [2022-11-22 02:46:30,247 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195600546] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:46:30,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148682685] [2022-11-22 02:46:30,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:46:30,247 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:46:30,248 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cd9fe60-422b-4413-9743-302bbba75048/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:46:30,254 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cd9fe60-422b-4413-9743-302bbba75048/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:46:30,290 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cd9fe60-422b-4413-9743-302bbba75048/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-22 02:46:30,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:46:30,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 1438 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-22 02:46:30,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:46:30,736 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-22 02:46:30,736 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:46:30,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1148682685] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:46:30,737 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 02:46:30,737 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [16] total 19 [2022-11-22 02:46:30,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773144536] [2022-11-22 02:46:30,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:46:30,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 02:46:30,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:46:30,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 02:46:30,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2022-11-22 02:46:30,739 INFO L87 Difference]: Start difference. First operand 4074 states and 6437 transitions. Second operand has 5 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 3 states have call predecessors, (15), 1 states have call successors, (15) [2022-11-22 02:46:31,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:46:31,277 INFO L93 Difference]: Finished difference Result 4095 states and 6464 transitions. [2022-11-22 02:46:31,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-22 02:46:31,278 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 3 states have call predecessors, (15), 1 states have call successors, (15) Word has length 91 [2022-11-22 02:46:31,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:46:31,303 INFO L225 Difference]: With dead ends: 4095 [2022-11-22 02:46:31,303 INFO L226 Difference]: Without dead ends: 4080 [2022-11-22 02:46:31,307 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2022-11-22 02:46:31,307 INFO L413 NwaCegarLoop]: 549 mSDtfsCounter, 30 mSDsluCounter, 1609 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 2158 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:46:31,308 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 2158 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 02:46:31,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4080 states. [2022-11-22 02:46:31,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4080 to 4074. [2022-11-22 02:46:31,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4074 states, 2814 states have (on average 1.5223880597014925) internal successors, (4284), 2990 states have internal predecessors, (4284), 973 states have call successors, (973), 225 states have call predecessors, (973), 286 states have return successors, (1172), 964 states have call predecessors, (1172), 968 states have call successors, (1172) [2022-11-22 02:46:31,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4074 states to 4074 states and 6429 transitions. [2022-11-22 02:46:31,830 INFO L78 Accepts]: Start accepts. Automaton has 4074 states and 6429 transitions. Word has length 91 [2022-11-22 02:46:31,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:46:31,831 INFO L495 AbstractCegarLoop]: Abstraction has 4074 states and 6429 transitions. [2022-11-22 02:46:31,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 3 states have call predecessors, (15), 1 states have call successors, (15) [2022-11-22 02:46:31,831 INFO L276 IsEmpty]: Start isEmpty. Operand 4074 states and 6429 transitions. [2022-11-22 02:46:31,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-11-22 02:46:31,835 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:46:31,835 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:46:31,849 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cd9fe60-422b-4413-9743-302bbba75048/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-22 02:46:32,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cd9fe60-422b-4413-9743-302bbba75048/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:46:32,044 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:46:32,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:46:32,044 INFO L85 PathProgramCache]: Analyzing trace with hash -1661371554, now seen corresponding path program 1 times [2022-11-22 02:46:32,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:46:32,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558814423] [2022-11-22 02:46:32,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:46:32,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:46:32,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:46:34,133 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-22 02:46:34,134 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:46:34,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558814423] [2022-11-22 02:46:34,134 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558814423] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:46:34,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153878542] [2022-11-22 02:46:34,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:46:34,135 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:46:34,135 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cd9fe60-422b-4413-9743-302bbba75048/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:46:34,136 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cd9fe60-422b-4413-9743-302bbba75048/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:46:34,162 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cd9fe60-422b-4413-9743-302bbba75048/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-22 02:46:34,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:46:34,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 1468 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-22 02:46:34,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:46:35,379 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 02:46:35,379 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:46:35,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [153878542] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:46:35,380 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 02:46:35,380 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [24] total 29 [2022-11-22 02:46:35,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189283368] [2022-11-22 02:46:35,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:46:35,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-22 02:46:35,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:46:35,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-22 02:46:35,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=744, Unknown=0, NotChecked=0, Total=812 [2022-11-22 02:46:35,383 INFO L87 Difference]: Start difference. First operand 4074 states and 6429 transitions. Second operand has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 6 states have internal predecessors, (62), 5 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2022-11-22 02:46:37,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:46:37,781 INFO L93 Difference]: Finished difference Result 9411 states and 14818 transitions. [2022-11-22 02:46:37,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 02:46:37,782 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 6 states have internal predecessors, (62), 5 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) Word has length 98 [2022-11-22 02:46:37,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:46:37,810 INFO L225 Difference]: With dead ends: 9411 [2022-11-22 02:46:37,810 INFO L226 Difference]: Without dead ends: 5353 [2022-11-22 02:46:37,832 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=78, Invalid=852, Unknown=0, NotChecked=0, Total=930 [2022-11-22 02:46:37,833 INFO L413 NwaCegarLoop]: 379 mSDtfsCounter, 851 mSDsluCounter, 1058 mSDsCounter, 0 mSdLazyCounter, 1527 mSolverCounterSat, 365 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 851 SdHoareTripleChecker+Valid, 1437 SdHoareTripleChecker+Invalid, 1892 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 365 IncrementalHoareTripleChecker+Valid, 1527 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-22 02:46:37,833 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [851 Valid, 1437 Invalid, 1892 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [365 Valid, 1527 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-22 02:46:37,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5353 states. [2022-11-22 02:46:38,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5353 to 5302. [2022-11-22 02:46:38,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5302 states, 3692 states have (on average 1.5159804983748646) internal successors, (5597), 3896 states have internal predecessors, (5597), 1235 states have call successors, (1235), 298 states have call predecessors, (1235), 374 states have return successors, (1487), 1214 states have call predecessors, (1487), 1230 states have call successors, (1487) [2022-11-22 02:46:38,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5302 states to 5302 states and 8319 transitions. [2022-11-22 02:46:38,523 INFO L78 Accepts]: Start accepts. Automaton has 5302 states and 8319 transitions. Word has length 98 [2022-11-22 02:46:38,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:46:38,524 INFO L495 AbstractCegarLoop]: Abstraction has 5302 states and 8319 transitions. [2022-11-22 02:46:38,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 6 states have internal predecessors, (62), 5 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2022-11-22 02:46:38,525 INFO L276 IsEmpty]: Start isEmpty. Operand 5302 states and 8319 transitions. [2022-11-22 02:46:38,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-11-22 02:46:38,528 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:46:38,528 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:46:38,537 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cd9fe60-422b-4413-9743-302bbba75048/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-22 02:46:38,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cd9fe60-422b-4413-9743-302bbba75048/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:46:38,737 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:46:38,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:46:38,737 INFO L85 PathProgramCache]: Analyzing trace with hash -179589231, now seen corresponding path program 1 times [2022-11-22 02:46:38,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:46:38,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680554911] [2022-11-22 02:46:38,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:46:38,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:46:38,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:46:39,447 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 02:46:39,447 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:46:39,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680554911] [2022-11-22 02:46:39,448 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680554911] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:46:39,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88190690] [2022-11-22 02:46:39,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:46:39,448 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:46:39,449 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cd9fe60-422b-4413-9743-302bbba75048/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:46:39,451 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cd9fe60-422b-4413-9743-302bbba75048/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:46:39,482 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cd9fe60-422b-4413-9743-302bbba75048/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-22 02:46:39,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:46:39,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 1472 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-22 02:46:39,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:46:42,300 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:46:42,300 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:46:45,161 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-22 02:46:45,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [88190690] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:46:45,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1704062884] [2022-11-22 02:46:45,191 INFO L159 IcfgInterpreter]: Started Sifa with 94 locations of interest [2022-11-22 02:46:45,191 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:46:45,195 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:46:45,201 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:46:45,201 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:46:51,198 INFO L197 IcfgInterpreter]: Interpreting procedure cleanup with input of size 588 for LOIs [2022-11-22 02:48:20,709 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 588 for LOIs [2022-11-22 02:48:29,442 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection with input of size 114 for LOIs [2022-11-22 02:48:30,123 INFO L197 IcfgInterpreter]: Interpreting procedure buttonForFloorIsPressed with input of size 87 for LOIs [2022-11-22 02:48:30,143 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection__wrappee__empty with input of size 128 for LOIs [2022-11-22 02:48:30,811 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 35 for LOIs [2022-11-22 02:48:30,832 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 82 for LOIs [2022-11-22 02:48:30,841 INFO L197 IcfgInterpreter]: Interpreting procedure bigMacCall with input of size 581 for LOIs [2022-11-22 02:48:34,622 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 585 for LOIs [2022-11-22 02:48:35,246 INFO L197 IcfgInterpreter]: Interpreting procedure isBlocked with input of size 453 for LOIs [2022-11-22 02:48:35,539 INFO L197 IcfgInterpreter]: Interpreting procedure continueInDirection with input of size 107 for LOIs [2022-11-22 02:48:35,963 INFO L197 IcfgInterpreter]: Interpreting procedure isTopFloor with input of size 105 for LOIs [2022-11-22 02:48:35,986 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 513 for LOIs [2022-11-22 02:48:36,144 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:48:59,280 WARN L233 SmtUtils]: Spent 7.42s on a formula simplification. DAG size of input: 653 DAG size of output: 600 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:49:07,114 WARN L233 SmtUtils]: Spent 7.48s on a formula simplification. DAG size of input: 653 DAG size of output: 600 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:49:16,403 WARN L233 SmtUtils]: Spent 5.63s on a formula simplification. DAG size of input: 780 DAG size of output: 602 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:50:09,713 WARN L233 SmtUtils]: Spent 5.84s on a formula simplification. DAG size of input: 541 DAG size of output: 475 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:50:16,229 WARN L233 SmtUtils]: Spent 5.76s on a formula simplification. DAG size of input: 543 DAG size of output: 477 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:50:22,795 WARN L233 SmtUtils]: Spent 5.80s on a formula simplification. DAG size of input: 546 DAG size of output: 480 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:50:40,588 WARN L233 SmtUtils]: Spent 6.19s on a formula simplification. DAG size of input: 555 DAG size of output: 483 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:50:47,302 WARN L233 SmtUtils]: Spent 5.87s on a formula simplification. DAG size of input: 555 DAG size of output: 482 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:50:55,132 WARN L233 SmtUtils]: Spent 6.96s on a formula simplification. DAG size of input: 558 DAG size of output: 503 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:51:02,386 WARN L233 SmtUtils]: Spent 6.37s on a formula simplification. DAG size of input: 561 DAG size of output: 494 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:51:09,727 WARN L233 SmtUtils]: Spent 6.43s on a formula simplification. DAG size of input: 567 DAG size of output: 500 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:51:17,391 WARN L233 SmtUtils]: Spent 6.70s on a formula simplification. DAG size of input: 583 DAG size of output: 510 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:51:17,395 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1704062884] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:51:17,395 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-22 02:51:17,396 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [67] imperfect sequences [11, 12, 12] total 94 [2022-11-22 02:51:17,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808999231] [2022-11-22 02:51:17,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:51:17,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-11-22 02:51:17,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:51:17,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-11-22 02:51:17,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=696, Invalid=8046, Unknown=0, NotChecked=0, Total=8742 [2022-11-22 02:51:17,400 INFO L87 Difference]: Start difference. First operand 5302 states and 8319 transitions. Second operand has 68 states, 56 states have (on average 1.125) internal successors, (63), 44 states have internal predecessors, (63), 17 states have call successors, (17), 13 states have call predecessors, (17), 13 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-11-22 02:51:24,291 WARN L233 SmtUtils]: Spent 6.27s on a formula simplification. DAG size of input: 618 DAG size of output: 583 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:51:31,039 WARN L233 SmtUtils]: Spent 6.39s on a formula simplification. DAG size of input: 624 DAG size of output: 589 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:51:37,583 WARN L233 SmtUtils]: Spent 5.34s on a formula simplification. DAG size of input: 602 DAG size of output: 591 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:51:43,494 WARN L233 SmtUtils]: Spent 5.64s on a formula simplification. DAG size of input: 614 DAG size of output: 603 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:51:50,485 WARN L233 SmtUtils]: Spent 6.66s on a formula simplification. DAG size of input: 656 DAG size of output: 620 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:51:57,808 WARN L233 SmtUtils]: Spent 6.89s on a formula simplification. DAG size of input: 652 DAG size of output: 616 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:52:04,521 WARN L233 SmtUtils]: Spent 6.34s on a formula simplification. DAG size of input: 635 DAG size of output: 602 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:52:11,254 WARN L233 SmtUtils]: Spent 6.40s on a formula simplification. DAG size of input: 641 DAG size of output: 608 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:52:18,677 WARN L233 SmtUtils]: Spent 6.99s on a formula simplification. DAG size of input: 671 DAG size of output: 619 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:52:25,794 WARN L233 SmtUtils]: Spent 6.71s on a formula simplification. DAG size of input: 658 DAG size of output: 622 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:52:33,025 WARN L233 SmtUtils]: Spent 6.81s on a formula simplification. DAG size of input: 662 DAG size of output: 626 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:52:40,294 WARN L233 SmtUtils]: Spent 6.85s on a formula simplification. DAG size of input: 664 DAG size of output: 628 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:53:06,471 WARN L233 SmtUtils]: Spent 5.09s on a formula simplification. DAG size of input: 536 DAG size of output: 526 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:53:11,827 WARN L233 SmtUtils]: Spent 5.15s on a formula simplification. DAG size of input: 538 DAG size of output: 528 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:53:17,346 WARN L233 SmtUtils]: Spent 5.23s on a formula simplification. DAG size of input: 541 DAG size of output: 531 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:53:32,404 WARN L233 SmtUtils]: Spent 5.37s on a formula simplification. DAG size of input: 545 DAG size of output: 533 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:53:38,177 WARN L233 SmtUtils]: Spent 5.30s on a formula simplification. DAG size of input: 542 DAG size of output: 534 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:53:54,514 WARN L233 SmtUtils]: Spent 6.11s on a formula simplification. DAG size of input: 566 DAG size of output: 552 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:54:00,613 WARN L233 SmtUtils]: Spent 5.63s on a formula simplification. DAG size of input: 557 DAG size of output: 543 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:54:06,824 WARN L233 SmtUtils]: Spent 5.89s on a formula simplification. DAG size of input: 563 DAG size of output: 549 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:54:13,316 WARN L233 SmtUtils]: Spent 6.06s on a formula simplification. DAG size of input: 573 DAG size of output: 559 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:54:52,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:54:52,575 INFO L93 Difference]: Finished difference Result 11426 states and 17902 transitions. [2022-11-22 02:54:52,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-11-22 02:54:52,576 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 56 states have (on average 1.125) internal successors, (63), 44 states have internal predecessors, (63), 17 states have call successors, (17), 13 states have call predecessors, (17), 13 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) Word has length 99 [2022-11-22 02:54:52,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:54:52,612 INFO L225 Difference]: With dead ends: 11426 [2022-11-22 02:54:52,613 INFO L226 Difference]: Without dead ends: 6124 [2022-11-22 02:54:52,640 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 211 SyntacticMatches, 6 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5573 ImplicationChecksByTransitivity, 314.6s TimeCoverageRelationStatistics Valid=1093, Invalid=13913, Unknown=0, NotChecked=0, Total=15006 [2022-11-22 02:54:52,644 INFO L413 NwaCegarLoop]: 534 mSDtfsCounter, 854 mSDsluCounter, 7331 mSDsCounter, 0 mSdLazyCounter, 16466 mSolverCounterSat, 212 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 58.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 866 SdHoareTripleChecker+Valid, 7865 SdHoareTripleChecker+Invalid, 16678 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.3s SdHoareTripleChecker+Time, 212 IncrementalHoareTripleChecker+Valid, 16466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 61.0s IncrementalHoareTripleChecker+Time [2022-11-22 02:54:52,644 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [866 Valid, 7865 Invalid, 16678 Unknown, 0 Unchecked, 0.3s Time], IncrementalHoareTripleChecker [212 Valid, 16466 Invalid, 0 Unknown, 0 Unchecked, 61.0s Time] [2022-11-22 02:54:52,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6124 states. [2022-11-22 02:54:53,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6124 to 5889. [2022-11-22 02:54:53,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5889 states, 4144 states have (on average 1.5060328185328185) internal successors, (6241), 4349 states have internal predecessors, (6241), 1324 states have call successors, (1324), 335 states have call predecessors, (1324), 420 states have return successors, (1601), 1311 states have call predecessors, (1601), 1319 states have call successors, (1601) [2022-11-22 02:54:53,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5889 states to 5889 states and 9166 transitions. [2022-11-22 02:54:53,777 INFO L78 Accepts]: Start accepts. Automaton has 5889 states and 9166 transitions. Word has length 99 [2022-11-22 02:54:53,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:54:53,778 INFO L495 AbstractCegarLoop]: Abstraction has 5889 states and 9166 transitions. [2022-11-22 02:54:53,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 56 states have (on average 1.125) internal successors, (63), 44 states have internal predecessors, (63), 17 states have call successors, (17), 13 states have call predecessors, (17), 13 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-11-22 02:54:53,778 INFO L276 IsEmpty]: Start isEmpty. Operand 5889 states and 9166 transitions. [2022-11-22 02:54:53,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-11-22 02:54:53,782 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:54:53,782 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:54:53,791 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cd9fe60-422b-4413-9743-302bbba75048/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-22 02:54:53,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cd9fe60-422b-4413-9743-302bbba75048/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-22 02:54:53,991 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:54:53,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:54:53,991 INFO L85 PathProgramCache]: Analyzing trace with hash 1798907305, now seen corresponding path program 1 times [2022-11-22 02:54:53,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:54:53,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074802382] [2022-11-22 02:54:53,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:54:53,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:54:54,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:54:54,260 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-22 02:54:54,260 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:54:54,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074802382] [2022-11-22 02:54:54,261 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074802382] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:54:54,261 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:54:54,261 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-22 02:54:54,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700849293] [2022-11-22 02:54:54,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:54:54,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-22 02:54:54,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:54:54,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-22 02:54:54,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-22 02:54:54,263 INFO L87 Difference]: Start difference. First operand 5889 states and 9166 transitions. Second operand has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 5 states have internal predecessors, (66), 2 states have call successors, (18), 2 states have call predecessors, (18), 4 states have return successors, (18), 4 states have call predecessors, (18), 2 states have call successors, (18) [2022-11-22 02:54:55,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:54:55,794 INFO L93 Difference]: Finished difference Result 10593 states and 16637 transitions. [2022-11-22 02:54:55,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-22 02:54:55,795 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 5 states have internal predecessors, (66), 2 states have call successors, (18), 2 states have call predecessors, (18), 4 states have return successors, (18), 4 states have call predecessors, (18), 2 states have call successors, (18) Word has length 108 [2022-11-22 02:54:55,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:54:55,833 INFO L225 Difference]: With dead ends: 10593 [2022-11-22 02:54:55,833 INFO L226 Difference]: Without dead ends: 6508 [2022-11-22 02:54:55,852 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-22 02:54:55,853 INFO L413 NwaCegarLoop]: 592 mSDtfsCounter, 37 mSDsluCounter, 2890 mSDsCounter, 0 mSdLazyCounter, 264 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 3482 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 02:54:55,853 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 3482 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 264 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 02:54:55,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6508 states. [2022-11-22 02:54:57,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6508 to 6077. [2022-11-22 02:54:57,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6077 states, 4278 states have (on average 1.4967274427302477) internal successors, (6403), 4494 states have internal predecessors, (6403), 1336 states have call successors, (1336), 335 states have call predecessors, (1336), 462 states have return successors, (1682), 1354 states have call predecessors, (1682), 1331 states have call successors, (1682) [2022-11-22 02:54:57,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6077 states to 6077 states and 9421 transitions. [2022-11-22 02:54:57,063 INFO L78 Accepts]: Start accepts. Automaton has 6077 states and 9421 transitions. Word has length 108 [2022-11-22 02:54:57,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:54:57,064 INFO L495 AbstractCegarLoop]: Abstraction has 6077 states and 9421 transitions. [2022-11-22 02:54:57,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 5 states have internal predecessors, (66), 2 states have call successors, (18), 2 states have call predecessors, (18), 4 states have return successors, (18), 4 states have call predecessors, (18), 2 states have call successors, (18) [2022-11-22 02:54:57,064 INFO L276 IsEmpty]: Start isEmpty. Operand 6077 states and 9421 transitions. [2022-11-22 02:54:57,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-11-22 02:54:57,068 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:54:57,068 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:54:57,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-22 02:54:57,069 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:54:57,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:54:57,069 INFO L85 PathProgramCache]: Analyzing trace with hash 1585589939, now seen corresponding path program 1 times [2022-11-22 02:54:57,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:54:57,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325927442] [2022-11-22 02:54:57,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:54:57,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:54:57,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:54:57,312 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-22 02:54:57,312 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:54:57,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325927442] [2022-11-22 02:54:57,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325927442] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:54:57,312 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:54:57,313 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-22 02:54:57,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746608586] [2022-11-22 02:54:57,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:54:57,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-22 02:54:57,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:54:57,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-22 02:54:57,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-22 02:54:57,315 INFO L87 Difference]: Start difference. First operand 6077 states and 9421 transitions. Second operand has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 5 states have internal predecessors, (68), 2 states have call successors, (19), 2 states have call predecessors, (19), 4 states have return successors, (18), 4 states have call predecessors, (18), 2 states have call successors, (18) [2022-11-22 02:54:58,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:54:58,879 INFO L93 Difference]: Finished difference Result 10792 states and 16888 transitions. [2022-11-22 02:54:58,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-22 02:54:58,880 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 5 states have internal predecessors, (68), 2 states have call successors, (19), 2 states have call predecessors, (19), 4 states have return successors, (18), 4 states have call predecessors, (18), 2 states have call successors, (18) Word has length 109 [2022-11-22 02:54:58,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:54:58,916 INFO L225 Difference]: With dead ends: 10792 [2022-11-22 02:54:58,917 INFO L226 Difference]: Without dead ends: 6559 [2022-11-22 02:54:58,934 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-22 02:54:58,937 INFO L413 NwaCegarLoop]: 597 mSDtfsCounter, 36 mSDsluCounter, 2910 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 3507 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 02:54:58,937 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 3507 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 02:54:58,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6559 states. [2022-11-22 02:54:59,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6559 to 6080. [2022-11-22 02:54:59,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6080 states, 4297 states have (on average 1.5003490807540145) internal successors, (6447), 4481 states have internal predecessors, (6447), 1345 states have call successors, (1345), 332 states have call predecessors, (1345), 437 states have return successors, (1650), 1373 states have call predecessors, (1650), 1340 states have call successors, (1650) [2022-11-22 02:54:59,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6080 states to 6080 states and 9442 transitions. [2022-11-22 02:55:00,000 INFO L78 Accepts]: Start accepts. Automaton has 6080 states and 9442 transitions. Word has length 109 [2022-11-22 02:55:00,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:55:00,001 INFO L495 AbstractCegarLoop]: Abstraction has 6080 states and 9442 transitions. [2022-11-22 02:55:00,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 5 states have internal predecessors, (68), 2 states have call successors, (19), 2 states have call predecessors, (19), 4 states have return successors, (18), 4 states have call predecessors, (18), 2 states have call successors, (18) [2022-11-22 02:55:00,001 INFO L276 IsEmpty]: Start isEmpty. Operand 6080 states and 9442 transitions. [2022-11-22 02:55:00,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-11-22 02:55:00,006 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:55:00,006 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2022-11-22 02:55:00,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-22 02:55:00,007 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:55:00,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:55:00,007 INFO L85 PathProgramCache]: Analyzing trace with hash 1538438724, now seen corresponding path program 1 times [2022-11-22 02:55:00,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:55:00,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284269267] [2022-11-22 02:55:00,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:55:00,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:55:00,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:55:00,653 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-22 02:55:00,653 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:55:00,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284269267] [2022-11-22 02:55:00,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284269267] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:55:00,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425175936] [2022-11-22 02:55:00,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:55:00,654 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:55:00,654 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cd9fe60-422b-4413-9743-302bbba75048/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:55:00,655 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cd9fe60-422b-4413-9743-302bbba75048/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:55:00,666 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cd9fe60-422b-4413-9743-302bbba75048/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-22 02:55:01,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:55:01,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 1565 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-22 02:55:01,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:55:01,423 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-22 02:55:01,423 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:55:02,539 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-22 02:55:02,539 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1425175936] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:55:02,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1030526074] [2022-11-22 02:55:02,543 INFO L159 IcfgInterpreter]: Started Sifa with 101 locations of interest [2022-11-22 02:55:02,544 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:55:02,544 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:55:02,545 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:55:02,545 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:55:06,282 INFO L197 IcfgInterpreter]: Interpreting procedure cleanup with input of size 588 for LOIs [2022-11-22 02:55:07,297 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 588 for LOIs [2022-11-22 02:55:12,987 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection with input of size 113 for LOIs [2022-11-22 02:55:13,816 INFO L197 IcfgInterpreter]: Interpreting procedure buttonForFloorIsPressed with input of size 87 for LOIs [2022-11-22 02:55:13,850 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection__wrappee__empty with input of size 111 for LOIs [2022-11-22 02:55:14,491 INFO L197 IcfgInterpreter]: Interpreting procedure isTopFloor with input of size 101 for LOIs [2022-11-22 02:55:14,503 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 533 for LOIs [2022-11-22 02:55:14,832 INFO L197 IcfgInterpreter]: Interpreting procedure bigMacCall with input of size 581 for LOIs [2022-11-22 02:55:18,826 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 585 for LOIs [2022-11-22 02:55:19,523 INFO L197 IcfgInterpreter]: Interpreting procedure getReverseHeading with input of size 87 for LOIs [2022-11-22 02:55:19,533 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 513 for LOIs [2022-11-22 02:55:19,689 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:55:43,526 WARN L233 SmtUtils]: Spent 7.59s on a formula simplification. DAG size of input: 653 DAG size of output: 600 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:55:51,518 WARN L233 SmtUtils]: Spent 7.56s on a formula simplification. DAG size of input: 653 DAG size of output: 600 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:56:01,147 WARN L233 SmtUtils]: Spent 5.72s on a formula simplification. DAG size of input: 780 DAG size of output: 602 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:56:53,162 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1030526074] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:56:53,162 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-22 02:56:53,162 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [13, 13, 13] total 76 [2022-11-22 02:56:53,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495216627] [2022-11-22 02:56:53,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:56:53,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-11-22 02:56:53,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:56:53,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-11-22 02:56:53,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=520, Invalid=5180, Unknown=0, NotChecked=0, Total=5700 [2022-11-22 02:56:53,166 INFO L87 Difference]: Start difference. First operand 6080 states and 9442 transitions. Second operand has 47 states, 34 states have (on average 2.0) internal successors, (68), 29 states have internal predecessors, (68), 14 states have call successors, (19), 11 states have call predecessors, (19), 10 states have return successors, (18), 11 states have call predecessors, (18), 14 states have call successors, (18) [2022-11-22 02:57:00,281 WARN L233 SmtUtils]: Spent 6.36s on a formula simplification. DAG size of input: 618 DAG size of output: 583 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:57:07,185 WARN L233 SmtUtils]: Spent 6.50s on a formula simplification. DAG size of input: 624 DAG size of output: 589 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:57:16,663 WARN L233 SmtUtils]: Spent 7.95s on a formula simplification. DAG size of input: 661 DAG size of output: 591 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:57:25,300 WARN L233 SmtUtils]: Spent 8.18s on a formula simplification. DAG size of input: 673 DAG size of output: 598 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:57:32,579 WARN L233 SmtUtils]: Spent 6.78s on a formula simplification. DAG size of input: 656 DAG size of output: 620 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:57:39,754 WARN L233 SmtUtils]: Spent 6.66s on a formula simplification. DAG size of input: 652 DAG size of output: 616 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:57:46,491 WARN L233 SmtUtils]: Spent 6.32s on a formula simplification. DAG size of input: 635 DAG size of output: 602 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:57:53,401 WARN L233 SmtUtils]: Spent 6.49s on a formula simplification. DAG size of input: 641 DAG size of output: 608 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:58:01,072 WARN L233 SmtUtils]: Spent 7.12s on a formula simplification. DAG size of input: 671 DAG size of output: 619 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:58:08,389 WARN L233 SmtUtils]: Spent 6.80s on a formula simplification. DAG size of input: 658 DAG size of output: 622 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:58:15,855 WARN L233 SmtUtils]: Spent 6.94s on a formula simplification. DAG size of input: 662 DAG size of output: 626 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:58:23,350 WARN L233 SmtUtils]: Spent 6.97s on a formula simplification. DAG size of input: 664 DAG size of output: 628 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:59:08,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:59:08,360 INFO L93 Difference]: Finished difference Result 10490 states and 16367 transitions. [2022-11-22 02:59:08,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-11-22 02:59:08,361 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 34 states have (on average 2.0) internal successors, (68), 29 states have internal predecessors, (68), 14 states have call successors, (19), 11 states have call predecessors, (19), 10 states have return successors, (18), 11 states have call predecessors, (18), 14 states have call successors, (18) Word has length 121 [2022-11-22 02:59:08,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:59:08,390 INFO L225 Difference]: With dead ends: 10490 [2022-11-22 02:59:08,390 INFO L226 Difference]: Without dead ends: 6065 [2022-11-22 02:59:08,407 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 390 GetRequests, 290 SyntacticMatches, 12 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2510 ImplicationChecksByTransitivity, 183.2s TimeCoverageRelationStatistics Valid=706, Invalid=7304, Unknown=0, NotChecked=0, Total=8010 [2022-11-22 02:59:08,407 INFO L413 NwaCegarLoop]: 478 mSDtfsCounter, 176 mSDsluCounter, 6970 mSDsCounter, 0 mSdLazyCounter, 10150 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 42.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 7448 SdHoareTripleChecker+Invalid, 10188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 10150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 44.7s IncrementalHoareTripleChecker+Time [2022-11-22 02:59:08,408 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [182 Valid, 7448 Invalid, 10188 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [38 Valid, 10150 Invalid, 0 Unknown, 0 Unchecked, 44.7s Time] [2022-11-22 02:59:08,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6065 states. [2022-11-22 02:59:09,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6065 to 5998. [2022-11-22 02:59:09,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5998 states, 4235 states have (on average 1.5036599763872491) internal successors, (6368), 4420 states have internal predecessors, (6368), 1333 states have call successors, (1333), 328 states have call predecessors, (1333), 429 states have return successors, (1632), 1356 states have call predecessors, (1632), 1328 states have call successors, (1632) [2022-11-22 02:59:09,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5998 states to 5998 states and 9333 transitions. [2022-11-22 02:59:09,535 INFO L78 Accepts]: Start accepts. Automaton has 5998 states and 9333 transitions. Word has length 121 [2022-11-22 02:59:09,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:59:09,535 INFO L495 AbstractCegarLoop]: Abstraction has 5998 states and 9333 transitions. [2022-11-22 02:59:09,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 34 states have (on average 2.0) internal successors, (68), 29 states have internal predecessors, (68), 14 states have call successors, (19), 11 states have call predecessors, (19), 10 states have return successors, (18), 11 states have call predecessors, (18), 14 states have call successors, (18) [2022-11-22 02:59:09,536 INFO L276 IsEmpty]: Start isEmpty. Operand 5998 states and 9333 transitions. [2022-11-22 02:59:09,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-11-22 02:59:09,540 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:59:09,540 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 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] [2022-11-22 02:59:09,549 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cd9fe60-422b-4413-9743-302bbba75048/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-22 02:59:09,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cd9fe60-422b-4413-9743-302bbba75048/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-22 02:59:09,746 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:59:09,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:59:09,746 INFO L85 PathProgramCache]: Analyzing trace with hash 713606034, now seen corresponding path program 1 times [2022-11-22 02:59:09,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:59:09,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307525591] [2022-11-22 02:59:09,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:59:09,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:59:09,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:59:10,008 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-11-22 02:59:10,008 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:59:10,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307525591] [2022-11-22 02:59:10,008 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307525591] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:59:10,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160325810] [2022-11-22 02:59:10,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:59:10,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:59:10,009 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cd9fe60-422b-4413-9743-302bbba75048/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:59:10,010 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cd9fe60-422b-4413-9743-302bbba75048/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:59:10,032 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cd9fe60-422b-4413-9743-302bbba75048/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-22 02:59:10,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:59:10,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 1533 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-22 02:59:10,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:59:10,402 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-22 02:59:10,402 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:59:10,402 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [160325810] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:59:10,402 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 02:59:10,403 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2022-11-22 02:59:10,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291035625] [2022-11-22 02:59:10,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:59:10,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 02:59:10,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:59:10,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 02:59:10,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-11-22 02:59:10,406 INFO L87 Difference]: Start difference. First operand 5998 states and 9333 transitions. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-22 02:59:11,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:59:11,677 INFO L93 Difference]: Finished difference Result 11923 states and 18866 transitions. [2022-11-22 02:59:11,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 02:59:11,678 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 118 [2022-11-22 02:59:11,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:59:11,701 INFO L225 Difference]: With dead ends: 11923 [2022-11-22 02:59:11,702 INFO L226 Difference]: Without dead ends: 6466 [2022-11-22 02:59:11,717 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-11-22 02:59:11,718 INFO L413 NwaCegarLoop]: 480 mSDtfsCounter, 213 mSDsluCounter, 936 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 1416 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-22 02:59:11,719 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 1416 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 251 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-22 02:59:11,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6466 states. [2022-11-22 02:59:12,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6466 to 6466. [2022-11-22 02:59:12,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6466 states, 4691 states have (on average 1.5442336388829674) internal successors, (7244), 4876 states have internal predecessors, (7244), 1333 states have call successors, (1333), 340 states have call predecessors, (1333), 441 states have return successors, (1632), 1356 states have call predecessors, (1632), 1328 states have call successors, (1632) [2022-11-22 02:59:12,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6466 states to 6466 states and 10209 transitions. [2022-11-22 02:59:12,771 INFO L78 Accepts]: Start accepts. Automaton has 6466 states and 10209 transitions. Word has length 118 [2022-11-22 02:59:12,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:59:12,771 INFO L495 AbstractCegarLoop]: Abstraction has 6466 states and 10209 transitions. [2022-11-22 02:59:12,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-22 02:59:12,772 INFO L276 IsEmpty]: Start isEmpty. Operand 6466 states and 10209 transitions. [2022-11-22 02:59:12,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-11-22 02:59:12,776 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:59:12,776 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:59:12,787 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cd9fe60-422b-4413-9743-302bbba75048/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-11-22 02:59:12,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cd9fe60-422b-4413-9743-302bbba75048/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:59:12,986 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:59:12,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:59:12,987 INFO L85 PathProgramCache]: Analyzing trace with hash -178289604, now seen corresponding path program 1 times [2022-11-22 02:59:12,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:59:12,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121784632] [2022-11-22 02:59:12,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:59:12,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:59:13,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:59:13,121 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-11-22 02:59:13,122 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:59:13,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121784632] [2022-11-22 02:59:13,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121784632] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:59:13,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083265177] [2022-11-22 02:59:13,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:59:13,123 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:59:13,123 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cd9fe60-422b-4413-9743-302bbba75048/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:59:13,124 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cd9fe60-422b-4413-9743-302bbba75048/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:59:13,146 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cd9fe60-422b-4413-9743-302bbba75048/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-22 02:59:13,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:59:13,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 1538 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-22 02:59:13,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:59:13,508 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-22 02:59:13,509 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:59:13,509 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2083265177] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:59:13,509 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 02:59:13,509 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-11-22 02:59:13,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951695782] [2022-11-22 02:59:13,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:59:13,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 02:59:13,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:59:13,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 02:59:13,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-22 02:59:13,511 INFO L87 Difference]: Start difference. First operand 6466 states and 10209 transitions. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-22 02:59:14,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:59:14,813 INFO L93 Difference]: Finished difference Result 12859 states and 20603 transitions. [2022-11-22 02:59:14,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 02:59:14,814 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 123 [2022-11-22 02:59:14,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:59:14,841 INFO L225 Difference]: With dead ends: 12859 [2022-11-22 02:59:14,842 INFO L226 Difference]: Without dead ends: 6934 [2022-11-22 02:59:14,862 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-22 02:59:14,862 INFO L413 NwaCegarLoop]: 480 mSDtfsCounter, 211 mSDsluCounter, 936 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 1416 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 02:59:14,863 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [211 Valid, 1416 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 02:59:14,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6934 states. [2022-11-22 02:59:16,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6934 to 6934. [2022-11-22 02:59:16,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6934 states, 5147 states have (on average 1.577618029920342) internal successors, (8120), 5332 states have internal predecessors, (8120), 1333 states have call successors, (1333), 352 states have call predecessors, (1333), 453 states have return successors, (1632), 1356 states have call predecessors, (1632), 1328 states have call successors, (1632) [2022-11-22 02:59:16,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6934 states to 6934 states and 11085 transitions. [2022-11-22 02:59:16,085 INFO L78 Accepts]: Start accepts. Automaton has 6934 states and 11085 transitions. Word has length 123 [2022-11-22 02:59:16,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:59:16,086 INFO L495 AbstractCegarLoop]: Abstraction has 6934 states and 11085 transitions. [2022-11-22 02:59:16,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-22 02:59:16,086 INFO L276 IsEmpty]: Start isEmpty. Operand 6934 states and 11085 transitions. [2022-11-22 02:59:16,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-11-22 02:59:16,091 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:59:16,092 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 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] [2022-11-22 02:59:16,100 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cd9fe60-422b-4413-9743-302bbba75048/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-22 02:59:16,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cd9fe60-422b-4413-9743-302bbba75048/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-22 02:59:16,302 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:59:16,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:59:16,303 INFO L85 PathProgramCache]: Analyzing trace with hash 70581612, now seen corresponding path program 1 times [2022-11-22 02:59:16,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:59:16,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3622477] [2022-11-22 02:59:16,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:59:16,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:59:16,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:59:16,432 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-11-22 02:59:16,432 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:59:16,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3622477] [2022-11-22 02:59:16,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3622477] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:59:16,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834748009] [2022-11-22 02:59:16,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:59:16,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:59:16,433 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cd9fe60-422b-4413-9743-302bbba75048/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:59:16,434 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cd9fe60-422b-4413-9743-302bbba75048/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:59:16,458 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cd9fe60-422b-4413-9743-302bbba75048/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-22 02:59:16,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:59:16,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 1542 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-22 02:59:16,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:59:16,796 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-22 02:59:16,796 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:59:16,797 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1834748009] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:59:16,797 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 02:59:16,797 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-11-22 02:59:16,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939632071] [2022-11-22 02:59:16,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:59:16,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 02:59:16,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:59:16,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 02:59:16,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-22 02:59:16,799 INFO L87 Difference]: Start difference. First operand 6934 states and 11085 transitions. Second operand has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-22 02:59:18,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:59:18,159 INFO L93 Difference]: Finished difference Result 13795 states and 22340 transitions. [2022-11-22 02:59:18,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 02:59:18,160 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 127 [2022-11-22 02:59:18,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:59:18,187 INFO L225 Difference]: With dead ends: 13795 [2022-11-22 02:59:18,187 INFO L226 Difference]: Without dead ends: 7402 [2022-11-22 02:59:18,209 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-22 02:59:18,209 INFO L413 NwaCegarLoop]: 480 mSDtfsCounter, 209 mSDsluCounter, 936 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 1416 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 02:59:18,210 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [209 Valid, 1416 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 02:59:18,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7402 states. [2022-11-22 02:59:19,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7402 to 7402. [2022-11-22 02:59:19,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7402 states, 5603 states have (on average 1.605568445475638) internal successors, (8996), 5788 states have internal predecessors, (8996), 1333 states have call successors, (1333), 364 states have call predecessors, (1333), 465 states have return successors, (1632), 1356 states have call predecessors, (1632), 1328 states have call successors, (1632) [2022-11-22 02:59:19,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7402 states to 7402 states and 11961 transitions. [2022-11-22 02:59:19,433 INFO L78 Accepts]: Start accepts. Automaton has 7402 states and 11961 transitions. Word has length 127 [2022-11-22 02:59:19,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:59:19,433 INFO L495 AbstractCegarLoop]: Abstraction has 7402 states and 11961 transitions. [2022-11-22 02:59:19,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-22 02:59:19,434 INFO L276 IsEmpty]: Start isEmpty. Operand 7402 states and 11961 transitions. [2022-11-22 02:59:19,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-11-22 02:59:19,439 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:59:19,439 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:59:19,455 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cd9fe60-422b-4413-9743-302bbba75048/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-11-22 02:59:19,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cd9fe60-422b-4413-9743-302bbba75048/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-22 02:59:19,647 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:59:19,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:59:19,648 INFO L85 PathProgramCache]: Analyzing trace with hash -786349454, now seen corresponding path program 1 times [2022-11-22 02:59:19,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:59:19,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361066809] [2022-11-22 02:59:19,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:59:19,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:59:19,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:59:19,779 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2022-11-22 02:59:19,780 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:59:19,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361066809] [2022-11-22 02:59:19,780 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361066809] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:59:19,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165598284] [2022-11-22 02:59:19,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:59:19,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:59:19,781 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cd9fe60-422b-4413-9743-302bbba75048/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:59:19,782 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cd9fe60-422b-4413-9743-302bbba75048/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:59:19,811 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cd9fe60-422b-4413-9743-302bbba75048/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-22 02:59:20,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:59:20,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 1545 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-22 02:59:20,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:59:20,184 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-11-22 02:59:20,185 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:59:20,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1165598284] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:59:20,185 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 02:59:20,185 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-11-22 02:59:20,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538748853] [2022-11-22 02:59:20,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:59:20,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 02:59:20,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:59:20,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 02:59:20,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-22 02:59:20,191 INFO L87 Difference]: Start difference. First operand 7402 states and 11961 transitions. Second operand has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16)