./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec2_product11.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_002b7849-f6c5-40ba-b674-d77f65fb1243/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_002b7849-f6c5-40ba-b674-d77f65fb1243/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_002b7849-f6c5-40ba-b674-d77f65fb1243/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_002b7849-f6c5-40ba-b674-d77f65fb1243/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec2_product11.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_002b7849-f6c5-40ba-b674-d77f65fb1243/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_002b7849-f6c5-40ba-b674-d77f65fb1243/bin/utaipan-gh47qXpMRh --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 8e809cb7921b0f8738511433928ba20d09f78a0d0fe23412d97e6052fa9e13ec --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-14 14:31:11,961 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 14:31:11,963 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 14:31:11,976 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 14:31:11,976 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 14:31:11,977 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 14:31:11,978 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 14:31:11,979 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 14:31:11,980 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 14:31:11,980 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 14:31:11,981 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 14:31:11,982 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 14:31:11,982 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 14:31:11,982 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 14:31:11,983 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 14:31:11,984 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 14:31:11,984 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 14:31:11,985 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 14:31:11,986 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 14:31:11,987 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 14:31:11,988 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 14:31:11,989 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 14:31:11,990 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 14:31:11,990 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 14:31:11,993 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 14:31:11,993 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 14:31:11,993 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 14:31:11,994 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 14:31:11,994 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 14:31:11,994 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 14:31:11,995 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 14:31:11,995 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 14:31:11,996 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 14:31:11,996 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 14:31:11,997 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 14:31:11,997 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 14:31:11,997 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 14:31:11,998 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 14:31:11,998 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 14:31:11,998 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 14:31:11,999 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 14:31:11,999 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_002b7849-f6c5-40ba-b674-d77f65fb1243/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 14:31:12,014 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 14:31:12,015 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 14:31:12,015 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 14:31:12,015 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 14:31:12,015 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 14:31:12,016 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 14:31:12,016 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 14:31:12,016 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 14:31:12,016 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 14:31:12,016 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 14:31:12,016 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 14:31:12,016 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 14:31:12,016 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 14:31:12,016 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 14:31:12,016 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 14:31:12,016 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 14:31:12,017 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 14:31:12,017 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 14:31:12,017 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 14:31:12,017 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 14:31:12,017 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 14:31:12,017 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 14:31:12,017 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 14:31:12,018 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 14:31:12,018 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 14:31:12,018 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 14:31:12,018 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 14:31:12,018 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 14:31:12,018 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 14:31:12,018 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 14:31:12,018 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 14:31:12,019 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 14:31:12,019 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 14:31:12,019 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 14:31:12,019 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 14:31:12,019 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 14:31:12,019 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 14:31:12,019 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 14:31:12,019 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 14:31:12,019 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 14:31:12,020 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 14:31:12,020 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_002b7849-f6c5-40ba-b674-d77f65fb1243/bin/utaipan-gh47qXpMRh/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_002b7849-f6c5-40ba-b674-d77f65fb1243/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8e809cb7921b0f8738511433928ba20d09f78a0d0fe23412d97e6052fa9e13ec [2022-12-14 14:31:12,209 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 14:31:12,228 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 14:31:12,230 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 14:31:12,231 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 14:31:12,231 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 14:31:12,232 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_002b7849-f6c5-40ba-b674-d77f65fb1243/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/product-lines/elevator_spec2_product11.cil.c [2022-12-14 14:31:14,771 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 14:31:15,002 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 14:31:15,003 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_002b7849-f6c5-40ba-b674-d77f65fb1243/sv-benchmarks/c/product-lines/elevator_spec2_product11.cil.c [2022-12-14 14:31:15,028 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_002b7849-f6c5-40ba-b674-d77f65fb1243/bin/utaipan-gh47qXpMRh/data/9f4e1d227/1c7b99e7c9a04bd79cb076707bbf155a/FLAG218eacbf6 [2022-12-14 14:31:15,327 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_002b7849-f6c5-40ba-b674-d77f65fb1243/bin/utaipan-gh47qXpMRh/data/9f4e1d227/1c7b99e7c9a04bd79cb076707bbf155a [2022-12-14 14:31:15,329 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 14:31:15,330 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 14:31:15,330 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 14:31:15,331 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 14:31:15,334 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 14:31:15,334 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 02:31:15" (1/1) ... [2022-12-14 14:31:15,335 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@31bc2b6d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:31:15, skipping insertion in model container [2022-12-14 14:31:15,335 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 02:31:15" (1/1) ... [2022-12-14 14:31:15,342 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 14:31:15,390 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 14:31:15,503 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_002b7849-f6c5-40ba-b674-d77f65fb1243/sv-benchmarks/c/product-lines/elevator_spec2_product11.cil.c[1545,1558] [2022-12-14 14:31:15,759 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 14:31:15,772 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 14:31:15,784 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_002b7849-f6c5-40ba-b674-d77f65fb1243/sv-benchmarks/c/product-lines/elevator_spec2_product11.cil.c[1545,1558] [2022-12-14 14:31:15,872 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 14:31:15,905 INFO L208 MainTranslator]: Completed translation [2022-12-14 14:31:15,906 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:31:15 WrapperNode [2022-12-14 14:31:15,906 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 14:31:15,906 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 14:31:15,906 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 14:31:15,907 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 14:31:15,911 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:31:15" (1/1) ... [2022-12-14 14:31:15,929 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:31:15" (1/1) ... [2022-12-14 14:31:15,966 INFO L138 Inliner]: procedures = 93, calls = 338, calls flagged for inlining = 25, calls inlined = 22, statements flattened = 1129 [2022-12-14 14:31:15,967 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 14:31:15,967 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 14:31:15,968 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 14:31:15,968 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 14:31:15,977 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:31:15" (1/1) ... [2022-12-14 14:31:15,977 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:31:15" (1/1) ... [2022-12-14 14:31:15,982 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:31:15" (1/1) ... [2022-12-14 14:31:15,983 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:31:15" (1/1) ... [2022-12-14 14:31:15,993 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:31:15" (1/1) ... [2022-12-14 14:31:16,007 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:31:15" (1/1) ... [2022-12-14 14:31:16,014 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:31:15" (1/1) ... [2022-12-14 14:31:16,021 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:31:15" (1/1) ... [2022-12-14 14:31:16,031 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 14:31:16,032 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 14:31:16,032 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 14:31:16,032 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 14:31:16,033 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:31:15" (1/1) ... [2022-12-14 14:31:16,039 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 14:31:16,047 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_002b7849-f6c5-40ba-b674-d77f65fb1243/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:31:16,058 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_002b7849-f6c5-40ba-b674-d77f65fb1243/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 14:31:16,060 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_002b7849-f6c5-40ba-b674-d77f65fb1243/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 14:31:16,093 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 14:31:16,093 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2022-12-14 14:31:16,093 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2022-12-14 14:31:16,093 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2022-12-14 14:31:16,093 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2022-12-14 14:31:16,093 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2022-12-14 14:31:16,093 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2022-12-14 14:31:16,093 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2022-12-14 14:31:16,094 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2022-12-14 14:31:16,094 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2022-12-14 14:31:16,094 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2022-12-14 14:31:16,094 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2022-12-14 14:31:16,094 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2022-12-14 14:31:16,094 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2022-12-14 14:31:16,094 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2022-12-14 14:31:16,094 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2022-12-14 14:31:16,094 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2022-12-14 14:31:16,094 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2022-12-14 14:31:16,094 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2022-12-14 14:31:16,094 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2022-12-14 14:31:16,094 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2022-12-14 14:31:16,094 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2022-12-14 14:31:16,094 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2022-12-14 14:31:16,094 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2022-12-14 14:31:16,095 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2022-12-14 14:31:16,095 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2022-12-14 14:31:16,095 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2022-12-14 14:31:16,095 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2022-12-14 14:31:16,095 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2022-12-14 14:31:16,095 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__empty [2022-12-14 14:31:16,095 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__empty [2022-12-14 14:31:16,095 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2022-12-14 14:31:16,095 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2022-12-14 14:31:16,095 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2022-12-14 14:31:16,095 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2022-12-14 14:31:16,095 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2022-12-14 14:31:16,095 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2022-12-14 14:31:16,095 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2022-12-14 14:31:16,095 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2022-12-14 14:31:16,096 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 14:31:16,096 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2022-12-14 14:31:16,096 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2022-12-14 14:31:16,096 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2022-12-14 14:31:16,096 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2022-12-14 14:31:16,096 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2022-12-14 14:31:16,096 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2022-12-14 14:31:16,096 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 14:31:16,096 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 14:31:16,096 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2022-12-14 14:31:16,096 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2022-12-14 14:31:16,210 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 14:31:16,212 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 14:31:16,952 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 14:31:17,423 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 14:31:17,423 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-12-14 14:31:17,426 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 02:31:17 BoogieIcfgContainer [2022-12-14 14:31:17,426 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 14:31:17,428 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 14:31:17,428 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 14:31:17,431 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 14:31:17,431 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 02:31:15" (1/3) ... [2022-12-14 14:31:17,431 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@584397e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 02:31:17, skipping insertion in model container [2022-12-14 14:31:17,431 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:31:15" (2/3) ... [2022-12-14 14:31:17,432 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@584397e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 02:31:17, skipping insertion in model container [2022-12-14 14:31:17,432 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 02:31:17" (3/3) ... [2022-12-14 14:31:17,433 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec2_product11.cil.c [2022-12-14 14:31:17,449 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 14:31:17,450 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 14:31:17,499 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 14:31:17,504 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;@2872f5c2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 14:31:17,504 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 14:31:17,509 INFO L276 IsEmpty]: Start isEmpty. Operand has 368 states, 249 states have (on average 1.6024096385542168) internal successors, (399), 270 states have internal predecessors, (399), 94 states have call successors, (94), 23 states have call predecessors, (94), 23 states have return successors, (94), 88 states have call predecessors, (94), 94 states have call successors, (94) [2022-12-14 14:31:17,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-12-14 14:31:17,527 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:31:17,528 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:31:17,528 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:31:17,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:31:17,532 INFO L85 PathProgramCache]: Analyzing trace with hash 1666484846, now seen corresponding path program 1 times [2022-12-14 14:31:17,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:31:17,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680263616] [2022-12-14 14:31:17,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:31:17,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:31:17,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:31:17,876 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 14:31:17,876 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:31:17,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680263616] [2022-12-14 14:31:17,877 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680263616] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:31:17,877 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:31:17,877 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 14:31:17,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83088902] [2022-12-14 14:31:17,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:31:17,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-12-14 14:31:17,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:31:17,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-12-14 14:31:17,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-14 14:31:17,912 INFO L87 Difference]: Start difference. First operand has 368 states, 249 states have (on average 1.6024096385542168) internal successors, (399), 270 states have internal predecessors, (399), 94 states have call successors, (94), 23 states have call predecessors, (94), 23 states have return successors, (94), 88 states have call predecessors, (94), 94 states have call successors, (94) Second operand has 2 states, 2 states have (on average 21.5) internal successors, (43), 2 states have internal predecessors, (43), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) [2022-12-14 14:31:18,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:31:18,035 INFO L93 Difference]: Finished difference Result 386 states and 614 transitions. [2022-12-14 14:31:18,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-12-14 14:31:18,037 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 21.5) internal successors, (43), 2 states have internal predecessors, (43), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) Word has length 77 [2022-12-14 14:31:18,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:31:18,052 INFO L225 Difference]: With dead ends: 386 [2022-12-14 14:31:18,052 INFO L226 Difference]: Without dead ends: 364 [2022-12-14 14:31:18,054 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-14 14:31:18,056 INFO L413 NwaCegarLoop]: 547 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 547 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 14:31:18,057 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 547 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 14:31:18,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2022-12-14 14:31:18,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 364. [2022-12-14 14:31:18,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 247 states have (on average 1.591093117408907) internal successors, (393), 266 states have internal predecessors, (393), 94 states have call successors, (94), 23 states have call predecessors, (94), 22 states have return successors, (89), 87 states have call predecessors, (89), 89 states have call successors, (89) [2022-12-14 14:31:18,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 576 transitions. [2022-12-14 14:31:18,105 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 576 transitions. Word has length 77 [2022-12-14 14:31:18,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:31:18,106 INFO L495 AbstractCegarLoop]: Abstraction has 364 states and 576 transitions. [2022-12-14 14:31:18,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 21.5) internal successors, (43), 2 states have internal predecessors, (43), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) [2022-12-14 14:31:18,106 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 576 transitions. [2022-12-14 14:31:18,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-12-14 14:31:18,109 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:31:18,110 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:31:18,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 14:31:18,110 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:31:18,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:31:18,111 INFO L85 PathProgramCache]: Analyzing trace with hash -608317935, now seen corresponding path program 1 times [2022-12-14 14:31:18,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:31:18,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115639716] [2022-12-14 14:31:18,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:31:18,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:31:18,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:31:18,516 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 14:31:18,516 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:31:18,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115639716] [2022-12-14 14:31:18,516 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115639716] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:31:18,517 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:31:18,517 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-14 14:31:18,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492541878] [2022-12-14 14:31:18,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:31:18,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 14:31:18,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:31:18,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 14:31:18,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-14 14:31:18,519 INFO L87 Difference]: Start difference. First operand 364 states and 576 transitions. Second operand has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 5 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2022-12-14 14:31:20,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:31:20,175 INFO L93 Difference]: Finished difference Result 1123 states and 1807 transitions. [2022-12-14 14:31:20,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-14 14:31:20,175 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 5 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) Word has length 78 [2022-12-14 14:31:20,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:31:20,180 INFO L225 Difference]: With dead ends: 1123 [2022-12-14 14:31:20,181 INFO L226 Difference]: Without dead ends: 775 [2022-12-14 14:31:20,184 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-12-14 14:31:20,184 INFO L413 NwaCegarLoop]: 374 mSDtfsCounter, 1135 mSDsluCounter, 1232 mSDsCounter, 0 mSdLazyCounter, 2445 mSolverCounterSat, 416 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1210 SdHoareTripleChecker+Valid, 1606 SdHoareTripleChecker+Invalid, 2861 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 416 IncrementalHoareTripleChecker+Valid, 2445 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-12-14 14:31:20,185 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1210 Valid, 1606 Invalid, 2861 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [416 Valid, 2445 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-12-14 14:31:20,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 775 states. [2022-12-14 14:31:20,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 775 to 726. [2022-12-14 14:31:20,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 726 states, 501 states have (on average 1.6027944111776447) internal successors, (803), 534 states have internal predecessors, (803), 182 states have call successors, (182), 42 states have call predecessors, (182), 42 states have return successors, (183), 174 states have call predecessors, (183), 177 states have call successors, (183) [2022-12-14 14:31:20,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 726 states to 726 states and 1168 transitions. [2022-12-14 14:31:20,248 INFO L78 Accepts]: Start accepts. Automaton has 726 states and 1168 transitions. Word has length 78 [2022-12-14 14:31:20,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:31:20,248 INFO L495 AbstractCegarLoop]: Abstraction has 726 states and 1168 transitions. [2022-12-14 14:31:20,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 5 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2022-12-14 14:31:20,249 INFO L276 IsEmpty]: Start isEmpty. Operand 726 states and 1168 transitions. [2022-12-14 14:31:20,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-12-14 14:31:20,252 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:31:20,252 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:31:20,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 14:31:20,252 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:31:20,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:31:20,253 INFO L85 PathProgramCache]: Analyzing trace with hash 815627838, now seen corresponding path program 1 times [2022-12-14 14:31:20,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:31:20,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018694260] [2022-12-14 14:31:20,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:31:20,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:31:20,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:31:20,518 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 14:31:20,518 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:31:20,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018694260] [2022-12-14 14:31:20,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018694260] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:31:20,519 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:31:20,519 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 14:31:20,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427397910] [2022-12-14 14:31:20,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:31:20,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 14:31:20,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:31:20,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 14:31:20,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 14:31:20,521 INFO L87 Difference]: Start difference. First operand 726 states and 1168 transitions. Second operand has 6 states, 6 states have (on average 7.666666666666667) internal successors, (46), 6 states have internal predecessors, (46), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) [2022-12-14 14:31:21,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:31:21,012 INFO L93 Difference]: Finished difference Result 797 states and 1280 transitions. [2022-12-14 14:31:21,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 14:31:21,013 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.666666666666667) internal successors, (46), 6 states have internal predecessors, (46), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) Word has length 82 [2022-12-14 14:31:21,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:31:21,017 INFO L225 Difference]: With dead ends: 797 [2022-12-14 14:31:21,017 INFO L226 Difference]: Without dead ends: 782 [2022-12-14 14:31:21,017 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-12-14 14:31:21,018 INFO L413 NwaCegarLoop]: 543 mSDtfsCounter, 670 mSDsluCounter, 1257 mSDsCounter, 0 mSdLazyCounter, 517 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 671 SdHoareTripleChecker+Valid, 1800 SdHoareTripleChecker+Invalid, 539 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 14:31:21,019 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [671 Valid, 1800 Invalid, 539 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 517 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 14:31:21,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 782 states. [2022-12-14 14:31:21,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 782 to 730. [2022-12-14 14:31:21,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 730 states, 505 states have (on average 1.598019801980198) internal successors, (807), 538 states have internal predecessors, (807), 182 states have call successors, (182), 42 states have call predecessors, (182), 42 states have return successors, (183), 174 states have call predecessors, (183), 177 states have call successors, (183) [2022-12-14 14:31:21,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 730 states to 730 states and 1172 transitions. [2022-12-14 14:31:21,052 INFO L78 Accepts]: Start accepts. Automaton has 730 states and 1172 transitions. Word has length 82 [2022-12-14 14:31:21,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:31:21,052 INFO L495 AbstractCegarLoop]: Abstraction has 730 states and 1172 transitions. [2022-12-14 14:31:21,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.666666666666667) internal successors, (46), 6 states have internal predecessors, (46), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) [2022-12-14 14:31:21,052 INFO L276 IsEmpty]: Start isEmpty. Operand 730 states and 1172 transitions. [2022-12-14 14:31:21,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-12-14 14:31:21,054 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:31:21,054 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:31:21,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-14 14:31:21,054 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:31:21,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:31:21,054 INFO L85 PathProgramCache]: Analyzing trace with hash -117914878, now seen corresponding path program 1 times [2022-12-14 14:31:21,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:31:21,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417505723] [2022-12-14 14:31:21,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:31:21,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:31:21,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:31:21,192 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 14:31:21,193 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:31:21,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417505723] [2022-12-14 14:31:21,193 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417505723] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:31:21,193 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:31:21,193 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 14:31:21,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044341200] [2022-12-14 14:31:21,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:31:21,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 14:31:21,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:31:21,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 14:31:21,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 14:31:21,195 INFO L87 Difference]: Start difference. First operand 730 states and 1172 transitions. Second operand has 5 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 3 states have call predecessors, (15), 1 states have call successors, (15) [2022-12-14 14:31:21,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:31:21,343 INFO L93 Difference]: Finished difference Result 749 states and 1196 transitions. [2022-12-14 14:31:21,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 14:31:21,343 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 3 states have call predecessors, (15), 1 states have call successors, (15) Word has length 87 [2022-12-14 14:31:21,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:31:21,349 INFO L225 Difference]: With dead ends: 749 [2022-12-14 14:31:21,350 INFO L226 Difference]: Without dead ends: 734 [2022-12-14 14:31:21,351 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-14 14:31:21,352 INFO L413 NwaCegarLoop]: 546 mSDtfsCounter, 30 mSDsluCounter, 1600 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 2146 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 14:31:21,352 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 2146 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 14:31:21,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 734 states. [2022-12-14 14:31:21,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 734 to 730. [2022-12-14 14:31:21,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 730 states, 505 states have (on average 1.5940594059405941) internal successors, (805), 538 states have internal predecessors, (805), 182 states have call successors, (182), 42 states have call predecessors, (182), 42 states have return successors, (183), 174 states have call predecessors, (183), 177 states have call successors, (183) [2022-12-14 14:31:21,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 730 states to 730 states and 1170 transitions. [2022-12-14 14:31:21,416 INFO L78 Accepts]: Start accepts. Automaton has 730 states and 1170 transitions. Word has length 87 [2022-12-14 14:31:21,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:31:21,417 INFO L495 AbstractCegarLoop]: Abstraction has 730 states and 1170 transitions. [2022-12-14 14:31:21,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 3 states have call predecessors, (15), 1 states have call successors, (15) [2022-12-14 14:31:21,417 INFO L276 IsEmpty]: Start isEmpty. Operand 730 states and 1170 transitions. [2022-12-14 14:31:21,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-12-14 14:31:21,420 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:31:21,420 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:31:21,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-14 14:31:21,421 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:31:21,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:31:21,421 INFO L85 PathProgramCache]: Analyzing trace with hash -1188324195, now seen corresponding path program 1 times [2022-12-14 14:31:21,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:31:21,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688331292] [2022-12-14 14:31:21,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:31:21,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:31:21,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:31:21,616 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-14 14:31:21,617 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:31:21,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688331292] [2022-12-14 14:31:21,617 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688331292] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:31:21,617 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:31:21,617 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 14:31:21,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392731000] [2022-12-14 14:31:21,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:31:21,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 14:31:21,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:31:21,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 14:31:21,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 14:31:21,619 INFO L87 Difference]: Start difference. First operand 730 states and 1170 transitions. Second operand has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-12-14 14:31:22,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:31:22,711 INFO L93 Difference]: Finished difference Result 2351 states and 3833 transitions. [2022-12-14 14:31:22,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 14:31:22,712 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 94 [2022-12-14 14:31:22,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:31:22,720 INFO L225 Difference]: With dead ends: 2351 [2022-12-14 14:31:22,720 INFO L226 Difference]: Without dead ends: 1637 [2022-12-14 14:31:22,723 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 14:31:22,723 INFO L413 NwaCegarLoop]: 318 mSDtfsCounter, 1148 mSDsluCounter, 385 mSDsCounter, 0 mSdLazyCounter, 921 mSolverCounterSat, 360 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1218 SdHoareTripleChecker+Valid, 703 SdHoareTripleChecker+Invalid, 1281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 360 IncrementalHoareTripleChecker+Valid, 921 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-12-14 14:31:22,724 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1218 Valid, 703 Invalid, 1281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [360 Valid, 921 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-12-14 14:31:22,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1637 states. [2022-12-14 14:31:22,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1637 to 1471. [2022-12-14 14:31:22,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1471 states, 1039 states have (on average 1.604427333974976) internal successors, (1667), 1102 states have internal predecessors, (1667), 351 states have call successors, (351), 75 states have call predecessors, (351), 80 states have return successors, (369), 329 states have call predecessors, (369), 346 states have call successors, (369) [2022-12-14 14:31:22,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1471 states to 1471 states and 2387 transitions. [2022-12-14 14:31:22,795 INFO L78 Accepts]: Start accepts. Automaton has 1471 states and 2387 transitions. Word has length 94 [2022-12-14 14:31:22,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:31:22,795 INFO L495 AbstractCegarLoop]: Abstraction has 1471 states and 2387 transitions. [2022-12-14 14:31:22,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-12-14 14:31:22,796 INFO L276 IsEmpty]: Start isEmpty. Operand 1471 states and 2387 transitions. [2022-12-14 14:31:22,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-12-14 14:31:22,797 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:31:22,797 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:31:22,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-14 14:31:22,798 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:31:22,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:31:22,798 INFO L85 PathProgramCache]: Analyzing trace with hash 1816520914, now seen corresponding path program 1 times [2022-12-14 14:31:22,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:31:22,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346922771] [2022-12-14 14:31:22,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:31:22,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:31:22,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:31:22,922 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-14 14:31:22,922 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:31:22,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346922771] [2022-12-14 14:31:22,922 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346922771] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:31:22,922 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:31:22,922 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 14:31:22,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585273453] [2022-12-14 14:31:22,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:31:22,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 14:31:22,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:31:22,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 14:31:22,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 14:31:22,924 INFO L87 Difference]: Start difference. First operand 1471 states and 2387 transitions. Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-12-14 14:31:24,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:31:24,087 INFO L93 Difference]: Finished difference Result 4506 states and 7427 transitions. [2022-12-14 14:31:24,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 14:31:24,088 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 95 [2022-12-14 14:31:24,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:31:24,106 INFO L225 Difference]: With dead ends: 4506 [2022-12-14 14:31:24,106 INFO L226 Difference]: Without dead ends: 3054 [2022-12-14 14:31:24,114 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 14:31:24,115 INFO L413 NwaCegarLoop]: 325 mSDtfsCounter, 1139 mSDsluCounter, 385 mSDsCounter, 0 mSdLazyCounter, 919 mSolverCounterSat, 359 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1208 SdHoareTripleChecker+Valid, 710 SdHoareTripleChecker+Invalid, 1278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 359 IncrementalHoareTripleChecker+Valid, 919 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-12-14 14:31:24,115 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1208 Valid, 710 Invalid, 1278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [359 Valid, 919 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-12-14 14:31:24,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3054 states. [2022-12-14 14:31:24,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3054 to 2841. [2022-12-14 14:31:24,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2841 states, 2029 states have (on average 1.6116313454903894) internal successors, (3270), 2159 states have internal predecessors, (3270), 652 states have call successors, (652), 141 states have call predecessors, (652), 159 states have return successors, (730), 602 states have call predecessors, (730), 647 states have call successors, (730) [2022-12-14 14:31:24,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2841 states to 2841 states and 4652 transitions. [2022-12-14 14:31:24,376 INFO L78 Accepts]: Start accepts. Automaton has 2841 states and 4652 transitions. Word has length 95 [2022-12-14 14:31:24,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:31:24,376 INFO L495 AbstractCegarLoop]: Abstraction has 2841 states and 4652 transitions. [2022-12-14 14:31:24,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-12-14 14:31:24,377 INFO L276 IsEmpty]: Start isEmpty. Operand 2841 states and 4652 transitions. [2022-12-14 14:31:24,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-12-14 14:31:24,380 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:31:24,380 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:31:24,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-14 14:31:24,380 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:31:24,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:31:24,381 INFO L85 PathProgramCache]: Analyzing trace with hash 477442687, now seen corresponding path program 1 times [2022-12-14 14:31:24,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:31:24,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960717868] [2022-12-14 14:31:24,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:31:24,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:31:24,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:31:24,507 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-14 14:31:24,507 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:31:24,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960717868] [2022-12-14 14:31:24,508 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960717868] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:31:24,508 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:31:24,508 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 14:31:24,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777543423] [2022-12-14 14:31:24,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:31:24,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 14:31:24,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:31:24,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 14:31:24,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 14:31:24,509 INFO L87 Difference]: Start difference. First operand 2841 states and 4652 transitions. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-12-14 14:31:25,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:31:25,680 INFO L93 Difference]: Finished difference Result 8658 states and 14491 transitions. [2022-12-14 14:31:25,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 14:31:25,680 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 96 [2022-12-14 14:31:25,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:31:25,702 INFO L225 Difference]: With dead ends: 8658 [2022-12-14 14:31:25,702 INFO L226 Difference]: Without dead ends: 5842 [2022-12-14 14:31:25,718 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 14:31:25,718 INFO L413 NwaCegarLoop]: 336 mSDtfsCounter, 1126 mSDsluCounter, 385 mSDsCounter, 0 mSdLazyCounter, 915 mSolverCounterSat, 359 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1194 SdHoareTripleChecker+Valid, 721 SdHoareTripleChecker+Invalid, 1274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 359 IncrementalHoareTripleChecker+Valid, 915 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-12-14 14:31:25,719 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1194 Valid, 721 Invalid, 1274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [359 Valid, 915 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-12-14 14:31:25,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5842 states. [2022-12-14 14:31:26,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5842 to 5526. [2022-12-14 14:31:26,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5526 states, 3964 states have (on average 1.612008072653885) internal successors, (6390), 4234 states have internal predecessors, (6390), 1238 states have call successors, (1238), 273 states have call predecessors, (1238), 323 states have return successors, (1528), 1132 states have call predecessors, (1528), 1233 states have call successors, (1528) [2022-12-14 14:31:26,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5526 states to 5526 states and 9156 transitions. [2022-12-14 14:31:26,228 INFO L78 Accepts]: Start accepts. Automaton has 5526 states and 9156 transitions. Word has length 96 [2022-12-14 14:31:26,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:31:26,228 INFO L495 AbstractCegarLoop]: Abstraction has 5526 states and 9156 transitions. [2022-12-14 14:31:26,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-12-14 14:31:26,229 INFO L276 IsEmpty]: Start isEmpty. Operand 5526 states and 9156 transitions. [2022-12-14 14:31:26,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-12-14 14:31:26,231 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:31:26,231 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:31:26,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-14 14:31:26,232 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:31:26,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:31:26,232 INFO L85 PathProgramCache]: Analyzing trace with hash 1915694516, now seen corresponding path program 1 times [2022-12-14 14:31:26,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:31:26,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404264784] [2022-12-14 14:31:26,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:31:26,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:31:26,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:31:26,407 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-14 14:31:26,407 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:31:26,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404264784] [2022-12-14 14:31:26,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404264784] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:31:26,407 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:31:26,407 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 14:31:26,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771289353] [2022-12-14 14:31:26,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:31:26,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 14:31:26,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:31:26,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 14:31:26,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 14:31:26,409 INFO L87 Difference]: Start difference. First operand 5526 states and 9156 transitions. Second operand has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-12-14 14:31:27,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:31:27,740 INFO L93 Difference]: Finished difference Result 16815 states and 28906 transitions. [2022-12-14 14:31:27,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 14:31:27,742 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 97 [2022-12-14 14:31:27,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:31:27,795 INFO L225 Difference]: With dead ends: 16815 [2022-12-14 14:31:27,795 INFO L226 Difference]: Without dead ends: 11326 [2022-12-14 14:31:27,816 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 14:31:27,816 INFO L413 NwaCegarLoop]: 348 mSDtfsCounter, 1113 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 914 mSolverCounterSat, 358 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1180 SdHoareTripleChecker+Valid, 730 SdHoareTripleChecker+Invalid, 1272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 358 IncrementalHoareTripleChecker+Valid, 914 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-12-14 14:31:27,817 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1180 Valid, 730 Invalid, 1272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [358 Valid, 914 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-12-14 14:31:27,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11326 states. [2022-12-14 14:31:28,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11326 to 10795. [2022-12-14 14:31:28,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10795 states, 7751 states have (on average 1.608824667784802) internal successors, (12470), 8313 states have internal predecessors, (12470), 2380 states have call successors, (2380), 537 states have call predecessors, (2380), 663 states have return successors, (3422), 2162 states have call predecessors, (3422), 2375 states have call successors, (3422) [2022-12-14 14:31:28,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10795 states to 10795 states and 18272 transitions. [2022-12-14 14:31:28,482 INFO L78 Accepts]: Start accepts. Automaton has 10795 states and 18272 transitions. Word has length 97 [2022-12-14 14:31:28,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:31:28,482 INFO L495 AbstractCegarLoop]: Abstraction has 10795 states and 18272 transitions. [2022-12-14 14:31:28,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-12-14 14:31:28,483 INFO L276 IsEmpty]: Start isEmpty. Operand 10795 states and 18272 transitions. [2022-12-14 14:31:28,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-12-14 14:31:28,484 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:31:28,484 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:31:28,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-14 14:31:28,485 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:31:28,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:31:28,485 INFO L85 PathProgramCache]: Analyzing trace with hash -743135135, now seen corresponding path program 1 times [2022-12-14 14:31:28,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:31:28,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36289108] [2022-12-14 14:31:28,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:31:28,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:31:28,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:31:28,611 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-14 14:31:28,611 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:31:28,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36289108] [2022-12-14 14:31:28,611 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36289108] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:31:28,611 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:31:28,611 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 14:31:28,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384771358] [2022-12-14 14:31:28,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:31:28,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 14:31:28,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:31:28,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 14:31:28,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 14:31:28,613 INFO L87 Difference]: Start difference. First operand 10795 states and 18272 transitions. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-12-14 14:31:30,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:31:30,665 INFO L93 Difference]: Finished difference Result 32920 states and 59442 transitions. [2022-12-14 14:31:30,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 14:31:30,666 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 98 [2022-12-14 14:31:30,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:31:30,747 INFO L225 Difference]: With dead ends: 32920 [2022-12-14 14:31:30,748 INFO L226 Difference]: Without dead ends: 22176 [2022-12-14 14:31:30,800 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 14:31:30,801 INFO L413 NwaCegarLoop]: 358 mSDtfsCounter, 1104 mSDsluCounter, 386 mSDsCounter, 0 mSdLazyCounter, 911 mSolverCounterSat, 355 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1170 SdHoareTripleChecker+Valid, 744 SdHoareTripleChecker+Invalid, 1266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 355 IncrementalHoareTripleChecker+Valid, 911 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-12-14 14:31:30,801 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1170 Valid, 744 Invalid, 1266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [355 Valid, 911 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-12-14 14:31:30,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22176 states. [2022-12-14 14:31:32,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22176 to 21104. [2022-12-14 14:31:32,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21104 states, 15181 states have (on average 1.607601607272248) internal successors, (24405), 16305 states have internal predecessors, (24405), 4604 states have call successors, (4604), 1063 states have call predecessors, (4604), 1318 states have return successors, (8041), 4161 states have call predecessors, (8041), 4599 states have call successors, (8041) [2022-12-14 14:31:32,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21104 states to 21104 states and 37050 transitions. [2022-12-14 14:31:32,273 INFO L78 Accepts]: Start accepts. Automaton has 21104 states and 37050 transitions. Word has length 98 [2022-12-14 14:31:32,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:31:32,273 INFO L495 AbstractCegarLoop]: Abstraction has 21104 states and 37050 transitions. [2022-12-14 14:31:32,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-12-14 14:31:32,273 INFO L276 IsEmpty]: Start isEmpty. Operand 21104 states and 37050 transitions. [2022-12-14 14:31:32,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-12-14 14:31:32,278 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:31:32,278 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:31:32,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-14 14:31:32,278 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:31:32,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:31:32,279 INFO L85 PathProgramCache]: Analyzing trace with hash -1161157665, now seen corresponding path program 1 times [2022-12-14 14:31:32,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:31:32,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934604101] [2022-12-14 14:31:32,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:31:32,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:31:32,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:31:32,385 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-12-14 14:31:32,385 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:31:32,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934604101] [2022-12-14 14:31:32,385 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934604101] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:31:32,385 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:31:32,385 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 14:31:32,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322948510] [2022-12-14 14:31:32,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:31:32,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 14:31:32,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:31:32,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 14:31:32,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 14:31:32,387 INFO L87 Difference]: Start difference. First operand 21104 states and 37050 transitions. Second operand has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 2 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2022-12-14 14:31:33,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:31:33,860 INFO L93 Difference]: Finished difference Result 45467 states and 83079 transitions. [2022-12-14 14:31:33,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 14:31:33,861 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 2 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) Word has length 142 [2022-12-14 14:31:33,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:31:33,950 INFO L225 Difference]: With dead ends: 45467 [2022-12-14 14:31:33,951 INFO L226 Difference]: Without dead ends: 24380 [2022-12-14 14:31:34,012 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 14:31:34,013 INFO L413 NwaCegarLoop]: 618 mSDtfsCounter, 110 mSDsluCounter, 1118 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 1736 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 14:31:34,013 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 1736 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 14:31:34,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24380 states. [2022-12-14 14:31:35,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24380 to 21344. [2022-12-14 14:31:35,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21344 states, 15404 states have (on average 1.6018566606076343) internal successors, (24675), 16512 states have internal predecessors, (24675), 4621 states have call successors, (4621), 1063 states have call predecessors, (4621), 1318 states have return successors, (8058), 4178 states have call predecessors, (8058), 4616 states have call successors, (8058) [2022-12-14 14:31:35,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21344 states to 21344 states and 37354 transitions. [2022-12-14 14:31:35,561 INFO L78 Accepts]: Start accepts. Automaton has 21344 states and 37354 transitions. Word has length 142 [2022-12-14 14:31:35,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:31:35,562 INFO L495 AbstractCegarLoop]: Abstraction has 21344 states and 37354 transitions. [2022-12-14 14:31:35,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 2 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2022-12-14 14:31:35,562 INFO L276 IsEmpty]: Start isEmpty. Operand 21344 states and 37354 transitions. [2022-12-14 14:31:35,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-12-14 14:31:35,573 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:31:35,573 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:31:35,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-14 14:31:35,573 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:31:35,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:31:35,574 INFO L85 PathProgramCache]: Analyzing trace with hash 1559500915, now seen corresponding path program 1 times [2022-12-14 14:31:35,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:31:35,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462988904] [2022-12-14 14:31:35,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:31:35,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:31:35,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:31:35,766 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-12-14 14:31:35,767 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:31:35,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462988904] [2022-12-14 14:31:35,767 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462988904] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:31:35,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674030274] [2022-12-14 14:31:35,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:31:35,767 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:31:35,767 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_002b7849-f6c5-40ba-b674-d77f65fb1243/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:31:35,769 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_002b7849-f6c5-40ba-b674-d77f65fb1243/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:31:35,769 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_002b7849-f6c5-40ba-b674-d77f65fb1243/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 14:31:36,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:31:36,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 1820 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 14:31:36,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:31:36,139 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-12-14 14:31:36,139 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 14:31:36,139 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [674030274] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:31:36,139 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 14:31:36,139 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-12-14 14:31:36,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440918509] [2022-12-14 14:31:36,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:31:36,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 14:31:36,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:31:36,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 14:31:36,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-14 14:31:36,141 INFO L87 Difference]: Start difference. First operand 21344 states and 37354 transitions. Second operand has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2022-12-14 14:31:37,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:31:37,429 INFO L93 Difference]: Finished difference Result 45167 states and 82294 transitions. [2022-12-14 14:31:37,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 14:31:37,429 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) Word has length 145 [2022-12-14 14:31:37,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:31:37,526 INFO L225 Difference]: With dead ends: 45167 [2022-12-14 14:31:37,526 INFO L226 Difference]: Without dead ends: 23840 [2022-12-14 14:31:37,593 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-12-14 14:31:37,594 INFO L413 NwaCegarLoop]: 477 mSDtfsCounter, 213 mSDsluCounter, 930 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 1407 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 14:31:37,594 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 1407 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 14:31:37,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23840 states. [2022-12-14 14:31:38,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23840 to 23840. [2022-12-14 14:31:38,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23840 states, 17836 states have (on average 1.6453801300740076) internal successors, (29347), 18944 states have internal predecessors, (29347), 4621 states have call successors, (4621), 1127 states have call predecessors, (4621), 1382 states have return successors, (8058), 4178 states have call predecessors, (8058), 4616 states have call successors, (8058) [2022-12-14 14:31:39,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23840 states to 23840 states and 42026 transitions. [2022-12-14 14:31:39,043 INFO L78 Accepts]: Start accepts. Automaton has 23840 states and 42026 transitions. Word has length 145 [2022-12-14 14:31:39,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:31:39,044 INFO L495 AbstractCegarLoop]: Abstraction has 23840 states and 42026 transitions. [2022-12-14 14:31:39,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2022-12-14 14:31:39,044 INFO L276 IsEmpty]: Start isEmpty. Operand 23840 states and 42026 transitions. [2022-12-14 14:31:39,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2022-12-14 14:31:39,048 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:31:39,049 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:31:39,058 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_002b7849-f6c5-40ba-b674-d77f65fb1243/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 14:31:39,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_002b7849-f6c5-40ba-b674-d77f65fb1243/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-12-14 14:31:39,249 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:31:39,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:31:39,250 INFO L85 PathProgramCache]: Analyzing trace with hash -1527978535, now seen corresponding path program 1 times [2022-12-14 14:31:39,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:31:39,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120494397] [2022-12-14 14:31:39,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:31:39,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:31:39,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:31:39,361 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-12-14 14:31:39,361 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:31:39,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120494397] [2022-12-14 14:31:39,361 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120494397] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:31:39,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107040663] [2022-12-14 14:31:39,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:31:39,361 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:31:39,361 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_002b7849-f6c5-40ba-b674-d77f65fb1243/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:31:39,362 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_002b7849-f6c5-40ba-b674-d77f65fb1243/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:31:39,363 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_002b7849-f6c5-40ba-b674-d77f65fb1243/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 14:31:39,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:31:39,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 1825 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 14:31:39,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:31:39,644 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-12-14 14:31:39,645 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 14:31:39,645 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1107040663] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:31:39,645 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 14:31:39,645 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-12-14 14:31:39,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148117943] [2022-12-14 14:31:39,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:31:39,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 14:31:39,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:31:39,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 14:31:39,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-14 14:31:39,647 INFO L87 Difference]: Start difference. First operand 23840 states and 42026 transitions. Second operand has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 2 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2022-12-14 14:31:41,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:31:41,146 INFO L93 Difference]: Finished difference Result 50159 states and 91572 transitions. [2022-12-14 14:31:41,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 14:31:41,147 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 2 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) Word has length 150 [2022-12-14 14:31:41,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:31:41,258 INFO L225 Difference]: With dead ends: 50159 [2022-12-14 14:31:41,258 INFO L226 Difference]: Without dead ends: 26336 [2022-12-14 14:31:41,335 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-12-14 14:31:41,336 INFO L413 NwaCegarLoop]: 477 mSDtfsCounter, 211 mSDsluCounter, 930 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 1407 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 14:31:41,336 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [211 Valid, 1407 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 14:31:41,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26336 states. [2022-12-14 14:31:42,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26336 to 26336. [2022-12-14 14:31:42,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26336 states, 20268 states have (on average 1.6784586540359188) internal successors, (34019), 21376 states have internal predecessors, (34019), 4621 states have call successors, (4621), 1191 states have call predecessors, (4621), 1446 states have return successors, (8058), 4178 states have call predecessors, (8058), 4616 states have call successors, (8058) [2022-12-14 14:31:43,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26336 states to 26336 states and 46698 transitions. [2022-12-14 14:31:43,053 INFO L78 Accepts]: Start accepts. Automaton has 26336 states and 46698 transitions. Word has length 150 [2022-12-14 14:31:43,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:31:43,053 INFO L495 AbstractCegarLoop]: Abstraction has 26336 states and 46698 transitions. [2022-12-14 14:31:43,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 2 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2022-12-14 14:31:43,053 INFO L276 IsEmpty]: Start isEmpty. Operand 26336 states and 46698 transitions. [2022-12-14 14:31:43,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2022-12-14 14:31:43,058 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:31:43,058 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:31:43,065 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_002b7849-f6c5-40ba-b674-d77f65fb1243/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 14:31:43,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_002b7849-f6c5-40ba-b674-d77f65fb1243/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-12-14 14:31:43,258 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:31:43,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:31:43,259 INFO L85 PathProgramCache]: Analyzing trace with hash 2118645721, now seen corresponding path program 1 times [2022-12-14 14:31:43,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:31:43,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279691020] [2022-12-14 14:31:43,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:31:43,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:31:43,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:31:43,372 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-12-14 14:31:43,372 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:31:43,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279691020] [2022-12-14 14:31:43,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279691020] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:31:43,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299060858] [2022-12-14 14:31:43,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:31:43,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:31:43,373 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_002b7849-f6c5-40ba-b674-d77f65fb1243/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:31:43,374 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_002b7849-f6c5-40ba-b674-d77f65fb1243/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:31:43,374 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_002b7849-f6c5-40ba-b674-d77f65fb1243/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 14:31:43,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:31:43,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 1829 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 14:31:43,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:31:43,650 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 69 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-14 14:31:43,651 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 14:31:43,651 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1299060858] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:31:43,651 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 14:31:43,651 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-12-14 14:31:43,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59658619] [2022-12-14 14:31:43,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:31:43,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 14:31:43,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:31:43,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 14:31:43,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-14 14:31:43,653 INFO L87 Difference]: Start difference. First operand 26336 states and 46698 transitions. Second operand has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 2 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2022-12-14 14:31:44,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:31:44,773 INFO L93 Difference]: Finished difference Result 55151 states and 100850 transitions. [2022-12-14 14:31:44,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 14:31:44,774 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 2 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) Word has length 154 [2022-12-14 14:31:44,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:31:44,870 INFO L225 Difference]: With dead ends: 55151 [2022-12-14 14:31:44,870 INFO L226 Difference]: Without dead ends: 28832 [2022-12-14 14:31:44,941 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-12-14 14:31:44,941 INFO L413 NwaCegarLoop]: 477 mSDtfsCounter, 209 mSDsluCounter, 930 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 1407 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 14:31:44,941 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [209 Valid, 1407 Invalid, 246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 14:31:44,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28832 states. [2022-12-14 14:31:46,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28832 to 28832. [2022-12-14 14:31:46,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28832 states, 22700 states have (on average 1.7044493392070486) internal successors, (38691), 23808 states have internal predecessors, (38691), 4621 states have call successors, (4621), 1255 states have call predecessors, (4621), 1510 states have return successors, (8058), 4178 states have call predecessors, (8058), 4616 states have call successors, (8058) [2022-12-14 14:31:46,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28832 states to 28832 states and 51370 transitions. [2022-12-14 14:31:46,134 INFO L78 Accepts]: Start accepts. Automaton has 28832 states and 51370 transitions. Word has length 154 [2022-12-14 14:31:46,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:31:46,135 INFO L495 AbstractCegarLoop]: Abstraction has 28832 states and 51370 transitions. [2022-12-14 14:31:46,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 2 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2022-12-14 14:31:46,135 INFO L276 IsEmpty]: Start isEmpty. Operand 28832 states and 51370 transitions. [2022-12-14 14:31:46,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-12-14 14:31:46,139 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:31:46,139 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:31:46,146 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_002b7849-f6c5-40ba-b674-d77f65fb1243/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 14:31:46,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_002b7849-f6c5-40ba-b674-d77f65fb1243/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-12-14 14:31:46,340 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:31:46,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:31:46,341 INFO L85 PathProgramCache]: Analyzing trace with hash -2091514093, now seen corresponding path program 1 times [2022-12-14 14:31:46,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:31:46,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953097288] [2022-12-14 14:31:46,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:31:46,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:31:46,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:31:47,649 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 2 proven. 40 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-12-14 14:31:47,649 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:31:47,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953097288] [2022-12-14 14:31:47,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953097288] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:31:47,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225286491] [2022-12-14 14:31:47,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:31:47,649 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:31:47,650 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_002b7849-f6c5-40ba-b674-d77f65fb1243/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:31:47,650 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_002b7849-f6c5-40ba-b674-d77f65fb1243/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:31:47,651 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_002b7849-f6c5-40ba-b674-d77f65fb1243/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 14:31:47,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:31:47,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 1832 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 14:31:47,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:31:47,944 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-12-14 14:31:47,944 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 14:31:47,944 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [225286491] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:31:47,944 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 14:31:47,944 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [26] total 28 [2022-12-14 14:31:47,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149856380] [2022-12-14 14:31:47,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:31:47,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 14:31:47,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:31:47,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 14:31:47,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=667, Unknown=0, NotChecked=0, Total=756 [2022-12-14 14:31:47,945 INFO L87 Difference]: Start difference. First operand 28832 states and 51370 transitions. Second operand has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 2 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2022-12-14 14:31:49,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:31:49,094 INFO L93 Difference]: Finished difference Result 60143 states and 110128 transitions. [2022-12-14 14:31:49,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 14:31:49,094 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 2 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) Word has length 157 [2022-12-14 14:31:49,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:31:49,195 INFO L225 Difference]: With dead ends: 60143 [2022-12-14 14:31:49,195 INFO L226 Difference]: Without dead ends: 31328 [2022-12-14 14:31:49,268 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=93, Invalid=719, Unknown=0, NotChecked=0, Total=812 [2022-12-14 14:31:49,268 INFO L413 NwaCegarLoop]: 477 mSDtfsCounter, 207 mSDsluCounter, 930 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 1407 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 14:31:49,268 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [207 Valid, 1407 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 14:31:49,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31328 states. [2022-12-14 14:31:50,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31328 to 31328. [2022-12-14 14:31:50,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31328 states, 25132 states have (on average 1.7254098360655739) internal successors, (43363), 26240 states have internal predecessors, (43363), 4621 states have call successors, (4621), 1319 states have call predecessors, (4621), 1574 states have return successors, (8058), 4178 states have call predecessors, (8058), 4616 states have call successors, (8058) [2022-12-14 14:31:50,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31328 states to 31328 states and 56042 transitions. [2022-12-14 14:31:50,506 INFO L78 Accepts]: Start accepts. Automaton has 31328 states and 56042 transitions. Word has length 157 [2022-12-14 14:31:50,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:31:50,507 INFO L495 AbstractCegarLoop]: Abstraction has 31328 states and 56042 transitions. [2022-12-14 14:31:50,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 2 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2022-12-14 14:31:50,507 INFO L276 IsEmpty]: Start isEmpty. Operand 31328 states and 56042 transitions. [2022-12-14 14:31:50,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2022-12-14 14:31:50,511 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:31:50,511 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:31:50,518 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_002b7849-f6c5-40ba-b674-d77f65fb1243/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 14:31:50,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_002b7849-f6c5-40ba-b674-d77f65fb1243/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-12-14 14:31:50,713 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:31:50,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:31:50,714 INFO L85 PathProgramCache]: Analyzing trace with hash 1237276195, now seen corresponding path program 1 times [2022-12-14 14:31:50,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:31:50,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019422041] [2022-12-14 14:31:50,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:31:50,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:31:50,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:31:52,029 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 2 proven. 40 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2022-12-14 14:31:52,029 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:31:52,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019422041] [2022-12-14 14:31:52,029 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019422041] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:31:52,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27248318] [2022-12-14 14:31:52,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:31:52,030 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:31:52,030 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_002b7849-f6c5-40ba-b674-d77f65fb1243/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:31:52,031 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_002b7849-f6c5-40ba-b674-d77f65fb1243/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:31:52,031 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_002b7849-f6c5-40ba-b674-d77f65fb1243/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 14:31:52,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:31:52,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 1834 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 14:31:52,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:31:52,348 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2022-12-14 14:31:52,348 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 14:31:52,348 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [27248318] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:31:52,348 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 14:31:52,348 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [26] total 28 [2022-12-14 14:31:52,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913538169] [2022-12-14 14:31:52,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:31:52,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 14:31:52,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:31:52,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 14:31:52,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=667, Unknown=0, NotChecked=0, Total=756 [2022-12-14 14:31:52,350 INFO L87 Difference]: Start difference. First operand 31328 states and 56042 transitions. Second operand has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2022-12-14 14:31:53,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:31:53,749 INFO L93 Difference]: Finished difference Result 65135 states and 119406 transitions. [2022-12-14 14:31:53,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 14:31:53,750 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) Word has length 159 [2022-12-14 14:31:53,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:31:53,854 INFO L225 Difference]: With dead ends: 65135 [2022-12-14 14:31:53,854 INFO L226 Difference]: Without dead ends: 33824 [2022-12-14 14:31:53,926 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=93, Invalid=719, Unknown=0, NotChecked=0, Total=812 [2022-12-14 14:31:53,926 INFO L413 NwaCegarLoop]: 477 mSDtfsCounter, 205 mSDsluCounter, 930 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 1407 SdHoareTripleChecker+Invalid, 244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 14:31:53,926 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [205 Valid, 1407 Invalid, 244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 14:31:53,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33824 states. [2022-12-14 14:31:55,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33824 to 33824. [2022-12-14 14:31:55,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33824 states, 27564 states have (on average 1.742671600638514) internal successors, (48035), 28672 states have internal predecessors, (48035), 4621 states have call successors, (4621), 1383 states have call predecessors, (4621), 1638 states have return successors, (8058), 4178 states have call predecessors, (8058), 4616 states have call successors, (8058) [2022-12-14 14:31:55,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33824 states to 33824 states and 60714 transitions. [2022-12-14 14:31:55,177 INFO L78 Accepts]: Start accepts. Automaton has 33824 states and 60714 transitions. Word has length 159 [2022-12-14 14:31:55,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:31:55,177 INFO L495 AbstractCegarLoop]: Abstraction has 33824 states and 60714 transitions. [2022-12-14 14:31:55,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2022-12-14 14:31:55,177 INFO L276 IsEmpty]: Start isEmpty. Operand 33824 states and 60714 transitions. [2022-12-14 14:31:55,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2022-12-14 14:31:55,181 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:31:55,181 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:31:55,188 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_002b7849-f6c5-40ba-b674-d77f65fb1243/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-12-14 14:31:55,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_002b7849-f6c5-40ba-b674-d77f65fb1243/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-12-14 14:31:55,383 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:31:55,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:31:55,383 INFO L85 PathProgramCache]: Analyzing trace with hash 1821848402, now seen corresponding path program 1 times [2022-12-14 14:31:55,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:31:55,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716248767] [2022-12-14 14:31:55,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:31:55,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:31:55,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:31:56,426 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 2 proven. 38 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-12-14 14:31:56,426 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:31:56,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716248767] [2022-12-14 14:31:56,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716248767] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:31:56,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641940670] [2022-12-14 14:31:56,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:31:56,427 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:31:56,427 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_002b7849-f6c5-40ba-b674-d77f65fb1243/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:31:56,427 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_002b7849-f6c5-40ba-b674-d77f65fb1243/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:31:56,428 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_002b7849-f6c5-40ba-b674-d77f65fb1243/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 14:31:56,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:31:56,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 1831 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-14 14:31:56,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:31:56,707 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-12-14 14:31:56,707 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 14:31:56,707 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1641940670] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:31:56,708 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 14:31:56,708 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [26] total 28 [2022-12-14 14:31:56,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041188898] [2022-12-14 14:31:56,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:31:56,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 14:31:56,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:31:56,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 14:31:56,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=668, Unknown=0, NotChecked=0, Total=756 [2022-12-14 14:31:56,709 INFO L87 Difference]: Start difference. First operand 33824 states and 60714 transitions. Second operand has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (24), 2 states have call predecessors, (24), 1 states have call successors, (24) [2022-12-14 14:31:57,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:31:57,912 INFO L93 Difference]: Finished difference Result 35444 states and 66357 transitions. [2022-12-14 14:31:57,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 14:31:57,913 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (24), 2 states have call predecessors, (24), 1 states have call successors, (24) Word has length 159 [2022-12-14 14:31:57,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:31:58,028 INFO L225 Difference]: With dead ends: 35444 [2022-12-14 14:31:58,028 INFO L226 Difference]: Without dead ends: 35287 [2022-12-14 14:31:58,045 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=92, Invalid=720, Unknown=0, NotChecked=0, Total=812 [2022-12-14 14:31:58,046 INFO L413 NwaCegarLoop]: 581 mSDtfsCounter, 44 mSDsluCounter, 1109 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 1690 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 14:31:58,046 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 1690 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 14:31:58,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35287 states. [2022-12-14 14:31:59,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35287 to 33948. [2022-12-14 14:31:59,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33948 states, 27688 states have (on average 1.7393455648656457) internal successors, (48159), 28796 states have internal predecessors, (48159), 4621 states have call successors, (4621), 1383 states have call predecessors, (4621), 1638 states have return successors, (8058), 4178 states have call predecessors, (8058), 4616 states have call successors, (8058) [2022-12-14 14:31:59,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33948 states to 33948 states and 60838 transitions. [2022-12-14 14:31:59,397 INFO L78 Accepts]: Start accepts. Automaton has 33948 states and 60838 transitions. Word has length 159 [2022-12-14 14:31:59,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:31:59,397 INFO L495 AbstractCegarLoop]: Abstraction has 33948 states and 60838 transitions. [2022-12-14 14:31:59,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (24), 2 states have call predecessors, (24), 1 states have call successors, (24) [2022-12-14 14:31:59,398 INFO L276 IsEmpty]: Start isEmpty. Operand 33948 states and 60838 transitions. [2022-12-14 14:31:59,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-12-14 14:31:59,441 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:31:59,441 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 5, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:31:59,447 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_002b7849-f6c5-40ba-b674-d77f65fb1243/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-12-14 14:31:59,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_002b7849-f6c5-40ba-b674-d77f65fb1243/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-12-14 14:31:59,644 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:31:59,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:31:59,645 INFO L85 PathProgramCache]: Analyzing trace with hash 1920921683, now seen corresponding path program 1 times [2022-12-14 14:31:59,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:31:59,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531444337] [2022-12-14 14:31:59,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:31:59,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:31:59,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:32:00,784 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 2 proven. 38 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-12-14 14:32:00,784 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:32:00,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531444337] [2022-12-14 14:32:00,784 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531444337] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:32:00,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1317614996] [2022-12-14 14:32:00,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:32:00,784 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:32:00,785 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_002b7849-f6c5-40ba-b674-d77f65fb1243/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:32:00,785 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_002b7849-f6c5-40ba-b674-d77f65fb1243/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:32:00,786 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_002b7849-f6c5-40ba-b674-d77f65fb1243/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 14:32:01,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:32:01,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 1895 conjuncts, 28 conjunts are in the unsatisfiable core [2022-12-14 14:32:01,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:32:01,898 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 64 proven. 8 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-12-14 14:32:01,898 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 14:32:26,980 WARN L233 SmtUtils]: Spent 24.53s on a formula simplification. DAG size of input: 1441 DAG size of output: 51 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-12-14 14:32:52,242 WARN L233 SmtUtils]: Spent 24.77s on a formula simplification. DAG size of input: 1446 DAG size of output: 56 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-12-14 14:33:19,239 WARN L233 SmtUtils]: Spent 26.24s on a formula simplification. DAG size of input: 1441 DAG size of output: 51 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-12-14 14:33:45,864 WARN L233 SmtUtils]: Spent 26.11s on a formula simplification. DAG size of input: 1446 DAG size of output: 56 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-12-14 14:34:11,510 WARN L233 SmtUtils]: Spent 25.02s on a formula simplification. DAG size of input: 1441 DAG size of output: 51 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-12-14 14:34:11,936 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2022-12-14 14:34:11,936 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1317614996] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-14 14:34:11,936 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-14 14:34:11,937 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [26, 14] total 47 [2022-12-14 14:34:11,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775329574] [2022-12-14 14:34:11,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:34:11,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-14 14:34:11,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:34:11,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-14 14:34:11,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=1985, Unknown=0, NotChecked=0, Total=2162 [2022-12-14 14:34:11,939 INFO L87 Difference]: Start difference. First operand 33948 states and 60838 transitions. Second operand has 11 states, 8 states have (on average 12.25) internal successors, (98), 10 states have internal predecessors, (98), 8 states have call successors, (29), 3 states have call predecessors, (29), 5 states have return successors, (28), 8 states have call predecessors, (28), 7 states have call successors, (28) [2022-12-14 14:34:17,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:34:17,425 INFO L93 Difference]: Finished difference Result 71626 states and 164580 transitions. [2022-12-14 14:34:17,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-12-14 14:34:17,425 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 8 states have (on average 12.25) internal successors, (98), 10 states have internal predecessors, (98), 8 states have call successors, (29), 3 states have call predecessors, (29), 5 states have return successors, (28), 8 states have call predecessors, (28), 7 states have call successors, (28) Word has length 182 [2022-12-14 14:34:17,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:34:17,650 INFO L225 Difference]: With dead ends: 71626 [2022-12-14 14:34:17,650 INFO L226 Difference]: Without dead ends: 46364 [2022-12-14 14:34:17,804 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 407 GetRequests, 347 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 927 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=336, Invalid=3446, Unknown=0, NotChecked=0, Total=3782 [2022-12-14 14:34:17,805 INFO L413 NwaCegarLoop]: 907 mSDtfsCounter, 1487 mSDsluCounter, 2875 mSDsCounter, 0 mSdLazyCounter, 5151 mSolverCounterSat, 409 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1586 SdHoareTripleChecker+Valid, 3782 SdHoareTripleChecker+Invalid, 5560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 409 IncrementalHoareTripleChecker+Valid, 5151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-12-14 14:34:17,805 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1586 Valid, 3782 Invalid, 5560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [409 Valid, 5151 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-12-14 14:34:17,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46364 states. [2022-12-14 14:34:20,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46364 to 40553. [2022-12-14 14:34:20,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40553 states, 32264 states have (on average 1.6805107860153732) internal successors, (54220), 33722 states have internal predecessors, (54220), 6140 states have call successors, (6140), 1703 states have call predecessors, (6140), 2148 states have return successors, (12244), 5536 states have call predecessors, (12244), 6135 states have call successors, (12244) [2022-12-14 14:34:20,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40553 states to 40553 states and 72604 transitions. [2022-12-14 14:34:20,446 INFO L78 Accepts]: Start accepts. Automaton has 40553 states and 72604 transitions. Word has length 182 [2022-12-14 14:34:20,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:34:20,446 INFO L495 AbstractCegarLoop]: Abstraction has 40553 states and 72604 transitions. [2022-12-14 14:34:20,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 8 states have (on average 12.25) internal successors, (98), 10 states have internal predecessors, (98), 8 states have call successors, (29), 3 states have call predecessors, (29), 5 states have return successors, (28), 8 states have call predecessors, (28), 7 states have call successors, (28) [2022-12-14 14:34:20,446 INFO L276 IsEmpty]: Start isEmpty. Operand 40553 states and 72604 transitions. [2022-12-14 14:34:20,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-12-14 14:34:20,457 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:34:20,458 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 5, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:34:20,464 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_002b7849-f6c5-40ba-b674-d77f65fb1243/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-12-14 14:34:20,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_002b7849-f6c5-40ba-b674-d77f65fb1243/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-12-14 14:34:20,659 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:34:20,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:34:20,660 INFO L85 PathProgramCache]: Analyzing trace with hash -1604006116, now seen corresponding path program 1 times [2022-12-14 14:34:20,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:34:20,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680374849] [2022-12-14 14:34:20,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:34:20,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:34:20,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:34:22,115 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 2 proven. 40 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-12-14 14:34:22,115 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:34:22,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680374849] [2022-12-14 14:34:22,115 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680374849] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:34:22,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916330072] [2022-12-14 14:34:22,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:34:22,115 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:34:22,116 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_002b7849-f6c5-40ba-b674-d77f65fb1243/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:34:22,116 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_002b7849-f6c5-40ba-b674-d77f65fb1243/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:34:22,117 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_002b7849-f6c5-40ba-b674-d77f65fb1243/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 14:34:22,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:34:22,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 1895 conjuncts, 28 conjunts are in the unsatisfiable core [2022-12-14 14:34:22,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:34:23,019 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 42 proven. 12 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-12-14 14:34:23,020 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 14:34:47,696 WARN L233 SmtUtils]: Spent 24.15s on a formula simplification. DAG size of input: 1441 DAG size of output: 51 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-12-14 14:35:12,937 WARN L233 SmtUtils]: Spent 24.75s on a formula simplification. DAG size of input: 1446 DAG size of output: 56 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-12-14 14:35:37,268 WARN L233 SmtUtils]: Spent 23.59s on a formula simplification. DAG size of input: 1441 DAG size of output: 51 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-12-14 14:36:02,464 WARN L233 SmtUtils]: Spent 24.63s on a formula simplification. DAG size of input: 1446 DAG size of output: 56 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-12-14 14:36:27,615 WARN L233 SmtUtils]: Spent 24.62s on a formula simplification. DAG size of input: 1441 DAG size of output: 51 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-12-14 14:36:28,007 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2022-12-14 14:36:28,008 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1916330072] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-14 14:36:28,008 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-14 14:36:28,008 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [30, 14] total 50 [2022-12-14 14:36:28,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299014414] [2022-12-14 14:36:28,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:36:28,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-14 14:36:28,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:36:28,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-14 14:36:28,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=2260, Unknown=0, NotChecked=0, Total=2450 [2022-12-14 14:36:28,009 INFO L87 Difference]: Start difference. First operand 40553 states and 72604 transitions. Second operand has 11 states, 8 states have (on average 12.25) internal successors, (98), 10 states have internal predecessors, (98), 8 states have call successors, (29), 3 states have call predecessors, (29), 5 states have return successors, (28), 8 states have call predecessors, (28), 7 states have call successors, (28) [2022-12-14 14:36:34,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:36:34,308 INFO L93 Difference]: Finished difference Result 90155 states and 210748 transitions. [2022-12-14 14:36:34,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-12-14 14:36:34,309 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 8 states have (on average 12.25) internal successors, (98), 10 states have internal predecessors, (98), 8 states have call successors, (29), 3 states have call predecessors, (29), 5 states have return successors, (28), 8 states have call predecessors, (28), 7 states have call successors, (28) Word has length 182 [2022-12-14 14:36:34,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:36:34,596 INFO L225 Difference]: With dead ends: 90155 [2022-12-14 14:36:34,596 INFO L226 Difference]: Without dead ends: 57188 [2022-12-14 14:36:34,808 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 411 GetRequests, 347 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1067 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=349, Invalid=3811, Unknown=0, NotChecked=0, Total=4160 [2022-12-14 14:36:34,809 INFO L413 NwaCegarLoop]: 828 mSDtfsCounter, 2398 mSDsluCounter, 2038 mSDsCounter, 0 mSdLazyCounter, 3662 mSolverCounterSat, 750 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2489 SdHoareTripleChecker+Valid, 2866 SdHoareTripleChecker+Invalid, 4412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 750 IncrementalHoareTripleChecker+Valid, 3662 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-12-14 14:36:34,809 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2489 Valid, 2866 Invalid, 4412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [750 Valid, 3662 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-12-14 14:36:34,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57188 states. [2022-12-14 14:36:38,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57188 to 45563. [2022-12-14 14:36:38,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45563 states, 35848 states have (on average 1.6320017853157778) internal successors, (58504), 37528 states have internal predecessors, (58504), 7086 states have call successors, (7086), 1959 states have call predecessors, (7086), 2628 states have return successors, (15697), 6483 states have call predecessors, (15697), 7081 states have call successors, (15697) [2022-12-14 14:36:38,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45563 states to 45563 states and 81287 transitions. [2022-12-14 14:36:38,432 INFO L78 Accepts]: Start accepts. Automaton has 45563 states and 81287 transitions. Word has length 182 [2022-12-14 14:36:38,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:36:38,432 INFO L495 AbstractCegarLoop]: Abstraction has 45563 states and 81287 transitions. [2022-12-14 14:36:38,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 8 states have (on average 12.25) internal successors, (98), 10 states have internal predecessors, (98), 8 states have call successors, (29), 3 states have call predecessors, (29), 5 states have return successors, (28), 8 states have call predecessors, (28), 7 states have call successors, (28) [2022-12-14 14:36:38,433 INFO L276 IsEmpty]: Start isEmpty. Operand 45563 states and 81287 transitions. [2022-12-14 14:36:38,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-12-14 14:36:38,445 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:36:38,445 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 5, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:36:38,451 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_002b7849-f6c5-40ba-b674-d77f65fb1243/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-14 14:36:38,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_002b7849-f6c5-40ba-b674-d77f65fb1243/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-12-14 14:36:38,647 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:36:38,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:36:38,648 INFO L85 PathProgramCache]: Analyzing trace with hash 112420195, now seen corresponding path program 1 times [2022-12-14 14:36:38,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:36:38,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529428318] [2022-12-14 14:36:38,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:36:38,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:36:38,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:36:38,854 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2022-12-14 14:36:38,854 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:36:38,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529428318] [2022-12-14 14:36:38,854 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529428318] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:36:38,854 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:36:38,854 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-12-14 14:36:38,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882842908] [2022-12-14 14:36:38,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:36:38,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 14:36:38,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:36:38,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 14:36:38,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-12-14 14:36:38,856 INFO L87 Difference]: Start difference. First operand 45563 states and 81287 transitions. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 6 states have call successors, (29), 3 states have call predecessors, (29), 3 states have return successors, (28), 6 states have call predecessors, (28), 5 states have call successors, (28) [2022-12-14 14:36:44,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:36:44,587 INFO L93 Difference]: Finished difference Result 111469 states and 204978 transitions. [2022-12-14 14:36:44,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-14 14:36:44,588 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 6 states have call successors, (29), 3 states have call predecessors, (29), 3 states have return successors, (28), 6 states have call predecessors, (28), 5 states have call successors, (28) Word has length 182 [2022-12-14 14:36:44,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:36:44,795 INFO L225 Difference]: With dead ends: 111469 [2022-12-14 14:36:44,796 INFO L226 Difference]: Without dead ends: 59906 [2022-12-14 14:36:44,931 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2022-12-14 14:36:44,931 INFO L413 NwaCegarLoop]: 361 mSDtfsCounter, 1711 mSDsluCounter, 1286 mSDsCounter, 0 mSdLazyCounter, 3511 mSolverCounterSat, 743 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1746 SdHoareTripleChecker+Valid, 1647 SdHoareTripleChecker+Invalid, 4254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 743 IncrementalHoareTripleChecker+Valid, 3511 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-12-14 14:36:44,932 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1746 Valid, 1647 Invalid, 4254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [743 Valid, 3511 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-12-14 14:36:44,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59906 states. [2022-12-14 14:36:48,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59906 to 53271. [2022-12-14 14:36:48,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53271 states, 40827 states have (on average 1.5577436500355157) internal successors, (63598), 43033 states have internal predecessors, (63598), 8597 states have call successors, (8597), 2889 states have call predecessors, (8597), 3846 states have return successors, (17725), 7761 states have call predecessors, (17725), 8592 states have call successors, (17725) [2022-12-14 14:36:48,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53271 states to 53271 states and 89920 transitions. [2022-12-14 14:36:48,587 INFO L78 Accepts]: Start accepts. Automaton has 53271 states and 89920 transitions. Word has length 182 [2022-12-14 14:36:48,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:36:48,587 INFO L495 AbstractCegarLoop]: Abstraction has 53271 states and 89920 transitions. [2022-12-14 14:36:48,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 6 states have call successors, (29), 3 states have call predecessors, (29), 3 states have return successors, (28), 6 states have call predecessors, (28), 5 states have call successors, (28) [2022-12-14 14:36:48,588 INFO L276 IsEmpty]: Start isEmpty. Operand 53271 states and 89920 transitions. [2022-12-14 14:36:48,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2022-12-14 14:36:48,601 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:36:48,601 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 5, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:36:48,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-12-14 14:36:48,601 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:36:48,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:36:48,602 INFO L85 PathProgramCache]: Analyzing trace with hash 1521296030, now seen corresponding path program 1 times [2022-12-14 14:36:48,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:36:48,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121970420] [2022-12-14 14:36:48,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:36:48,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:36:48,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:36:48,811 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2022-12-14 14:36:48,811 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:36:48,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121970420] [2022-12-14 14:36:48,811 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121970420] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:36:48,811 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:36:48,812 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-12-14 14:36:48,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828341183] [2022-12-14 14:36:48,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:36:48,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 14:36:48,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:36:48,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 14:36:48,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-12-14 14:36:48,813 INFO L87 Difference]: Start difference. First operand 53271 states and 89920 transitions. Second operand has 8 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 5 states have call successors, (29), 3 states have call predecessors, (29), 3 states have return successors, (28), 6 states have call predecessors, (28), 4 states have call successors, (28) [2022-12-14 14:36:54,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:36:54,373 INFO L93 Difference]: Finished difference Result 120985 states and 206056 transitions. [2022-12-14 14:36:54,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-14 14:36:54,373 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 5 states have call successors, (29), 3 states have call predecessors, (29), 3 states have return successors, (28), 6 states have call predecessors, (28), 4 states have call successors, (28) Word has length 183 [2022-12-14 14:36:54,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:36:54,588 INFO L225 Difference]: With dead ends: 120985 [2022-12-14 14:36:54,588 INFO L226 Difference]: Without dead ends: 67733 [2022-12-14 14:36:54,730 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2022-12-14 14:36:54,730 INFO L413 NwaCegarLoop]: 281 mSDtfsCounter, 1115 mSDsluCounter, 1004 mSDsCounter, 0 mSdLazyCounter, 3786 mSolverCounterSat, 476 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1178 SdHoareTripleChecker+Valid, 1285 SdHoareTripleChecker+Invalid, 4262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 476 IncrementalHoareTripleChecker+Valid, 3786 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-12-14 14:36:54,730 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1178 Valid, 1285 Invalid, 4262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [476 Valid, 3786 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-12-14 14:36:54,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67733 states. [2022-12-14 14:36:58,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67733 to 65013. [2022-12-14 14:36:58,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65013 states, 51835 states have (on average 1.6180380052088357) internal successors, (83871), 54174 states have internal predecessors, (83871), 8771 states have call successors, (8771), 3329 states have call predecessors, (8771), 4406 states have return successors, (15014), 7934 states have call predecessors, (15014), 8766 states have call successors, (15014) [2022-12-14 14:36:58,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65013 states to 65013 states and 107656 transitions. [2022-12-14 14:36:58,707 INFO L78 Accepts]: Start accepts. Automaton has 65013 states and 107656 transitions. Word has length 183 [2022-12-14 14:36:58,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:36:58,708 INFO L495 AbstractCegarLoop]: Abstraction has 65013 states and 107656 transitions. [2022-12-14 14:36:58,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 5 states have call successors, (29), 3 states have call predecessors, (29), 3 states have return successors, (28), 6 states have call predecessors, (28), 4 states have call successors, (28) [2022-12-14 14:36:58,708 INFO L276 IsEmpty]: Start isEmpty. Operand 65013 states and 107656 transitions. [2022-12-14 14:36:58,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2022-12-14 14:36:58,713 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:36:58,713 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 5, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:36:58,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-12-14 14:36:58,713 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:36:58,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:36:58,713 INFO L85 PathProgramCache]: Analyzing trace with hash 1751876834, now seen corresponding path program 1 times [2022-12-14 14:36:58,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:36:58,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659752692] [2022-12-14 14:36:58,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:36:58,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:36:58,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:36:59,378 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 4 proven. 20 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2022-12-14 14:36:59,378 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:36:59,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659752692] [2022-12-14 14:36:59,378 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659752692] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:36:59,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699685874] [2022-12-14 14:36:59,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:36:59,378 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:36:59,378 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_002b7849-f6c5-40ba-b674-d77f65fb1243/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:36:59,379 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_002b7849-f6c5-40ba-b674-d77f65fb1243/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:36:59,380 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_002b7849-f6c5-40ba-b674-d77f65fb1243/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-14 14:36:59,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:36:59,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 1904 conjuncts, 49 conjunts are in the unsatisfiable core [2022-12-14 14:36:59,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:37:00,079 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2022-12-14 14:37:00,079 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 14:37:00,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1699685874] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:37:00,079 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 14:37:00,079 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [14] total 24 [2022-12-14 14:37:00,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456312784] [2022-12-14 14:37:00,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:37:00,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-14 14:37:00,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:37:00,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-14 14:37:00,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2022-12-14 14:37:00,080 INFO L87 Difference]: Start difference. First operand 65013 states and 107656 transitions. Second operand has 12 states, 9 states have (on average 10.777777777777779) internal successors, (97), 10 states have internal predecessors, (97), 6 states have call successors, (29), 3 states have call predecessors, (29), 6 states have return successors, (28), 7 states have call predecessors, (28), 5 states have call successors, (28) [2022-12-14 14:37:05,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:37:05,254 INFO L93 Difference]: Finished difference Result 132037 states and 218549 transitions. [2022-12-14 14:37:05,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-14 14:37:05,255 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 9 states have (on average 10.777777777777779) internal successors, (97), 10 states have internal predecessors, (97), 6 states have call successors, (29), 3 states have call predecessors, (29), 6 states have return successors, (28), 7 states have call predecessors, (28), 5 states have call successors, (28) Word has length 185 [2022-12-14 14:37:05,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:37:05,473 INFO L225 Difference]: With dead ends: 132037 [2022-12-14 14:37:05,473 INFO L226 Difference]: Without dead ends: 67339 [2022-12-14 14:37:05,592 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=115, Invalid=815, Unknown=0, NotChecked=0, Total=930 [2022-12-14 14:37:05,592 INFO L413 NwaCegarLoop]: 235 mSDtfsCounter, 1226 mSDsluCounter, 1151 mSDsCounter, 0 mSdLazyCounter, 3351 mSolverCounterSat, 586 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1226 SdHoareTripleChecker+Valid, 1386 SdHoareTripleChecker+Invalid, 3937 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 586 IncrementalHoareTripleChecker+Valid, 3351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-12-14 14:37:05,592 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1226 Valid, 1386 Invalid, 3937 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [586 Valid, 3351 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-12-14 14:37:05,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67339 states. [2022-12-14 14:37:09,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67339 to 65258. [2022-12-14 14:37:09,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65258 states, 52092 states have (on average 1.6136066958458113) internal successors, (84056), 54426 states have internal predecessors, (84056), 8631 states have call successors, (8631), 3329 states have call predecessors, (8631), 4534 states have return successors, (15006), 7924 states have call predecessors, (15006), 8626 states have call successors, (15006) [2022-12-14 14:37:09,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65258 states to 65258 states and 107693 transitions. [2022-12-14 14:37:09,768 INFO L78 Accepts]: Start accepts. Automaton has 65258 states and 107693 transitions. Word has length 185 [2022-12-14 14:37:09,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:37:09,768 INFO L495 AbstractCegarLoop]: Abstraction has 65258 states and 107693 transitions. [2022-12-14 14:37:09,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 9 states have (on average 10.777777777777779) internal successors, (97), 10 states have internal predecessors, (97), 6 states have call successors, (29), 3 states have call predecessors, (29), 6 states have return successors, (28), 7 states have call predecessors, (28), 5 states have call successors, (28) [2022-12-14 14:37:09,769 INFO L276 IsEmpty]: Start isEmpty. Operand 65258 states and 107693 transitions. [2022-12-14 14:37:09,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2022-12-14 14:37:09,773 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:37:09,773 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 5, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:37:09,781 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_002b7849-f6c5-40ba-b674-d77f65fb1243/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-14 14:37:09,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_002b7849-f6c5-40ba-b674-d77f65fb1243/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:37:09,975 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:37:09,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:37:09,975 INFO L85 PathProgramCache]: Analyzing trace with hash -222469233, now seen corresponding path program 1 times [2022-12-14 14:37:09,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:37:09,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155642098] [2022-12-14 14:37:09,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:37:09,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:37:10,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:37:10,874 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 2 proven. 36 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2022-12-14 14:37:10,874 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:37:10,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155642098] [2022-12-14 14:37:10,874 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155642098] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:37:10,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930357263] [2022-12-14 14:37:10,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:37:10,874 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:37:10,875 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_002b7849-f6c5-40ba-b674-d77f65fb1243/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:37:10,875 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_002b7849-f6c5-40ba-b674-d77f65fb1243/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:37:10,877 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_002b7849-f6c5-40ba-b674-d77f65fb1243/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-14 14:37:11,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:37:11,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 1904 conjuncts, 55 conjunts are in the unsatisfiable core [2022-12-14 14:37:11,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:37:11,674 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2022-12-14 14:37:11,674 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 14:37:13,801 WARN L176 XnfTransformerHelper]: Simplifying conjuction of 9813 disjunctions. This might take some time... [2022-12-14 14:37:19,879 INFO L192 XnfTransformerHelper]: Simplified to conjuction of 9813 disjunctions. [2022-12-14 14:37:20,156 WARN L176 XnfTransformerHelper]: Simplifying conjuction of 9813 disjunctions. This might take some time... [2022-12-14 14:37:26,182 INFO L192 XnfTransformerHelper]: Simplified to conjuction of 9813 disjunctions. [2022-12-14 14:37:26,457 WARN L176 XnfTransformerHelper]: Simplifying conjuction of 9813 disjunctions. This might take some time... [2022-12-14 14:37:32,297 INFO L192 XnfTransformerHelper]: Simplified to conjuction of 9813 disjunctions. [2022-12-14 14:37:32,381 WARN L176 XnfTransformerHelper]: Simplifying conjuction of 49188 disjunctions. This might take some time... [2022-12-14 14:40:05,275 INFO L192 XnfTransformerHelper]: Simplified to conjuction of 49188 disjunctions.