./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/Problem05_label46+token_ring.07.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0f8a17c6 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e173e06f-d421-459d-8e41-451c2a26a282/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e173e06f-d421-459d-8e41-451c2a26a282/bin/utaipan-UbGMyvGFUs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e173e06f-d421-459d-8e41-451c2a26a282/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e173e06f-d421-459d-8e41-451c2a26a282/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/Problem05_label46+token_ring.07.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e173e06f-d421-459d-8e41-451c2a26a282/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e173e06f-d421-459d-8e41-451c2a26a282/bin/utaipan-UbGMyvGFUs --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 23a748a14ab5667159adb09776d3545981eaa20034460211a51a13329e4251e4 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 14:43:23,748 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 14:43:23,751 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 14:43:23,800 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 14:43:23,801 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 14:43:23,806 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 14:43:23,809 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 14:43:23,814 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 14:43:23,817 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 14:43:23,824 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 14:43:23,825 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 14:43:23,828 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 14:43:23,828 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 14:43:23,832 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 14:43:23,835 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 14:43:23,840 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 14:43:23,842 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 14:43:23,844 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 14:43:23,847 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 14:43:23,857 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 14:43:23,859 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 14:43:23,861 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 14:43:23,865 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 14:43:23,867 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 14:43:23,878 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 14:43:23,878 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 14:43:23,879 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 14:43:23,881 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 14:43:23,882 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 14:43:23,884 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 14:43:23,886 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 14:43:23,887 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 14:43:23,889 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 14:43:23,891 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 14:43:23,893 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 14:43:23,893 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 14:43:23,894 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 14:43:23,895 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 14:43:23,895 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 14:43:23,896 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 14:43:23,897 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 14:43:23,899 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e173e06f-d421-459d-8e41-451c2a26a282/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-19 14:43:23,960 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 14:43:23,960 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 14:43:23,962 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 14:43:23,962 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 14:43:23,963 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 14:43:23,963 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 14:43:23,963 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 14:43:23,964 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-19 14:43:23,971 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 14:43:23,971 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 14:43:23,973 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-19 14:43:23,973 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-19 14:43:23,973 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 14:43:23,974 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-19 14:43:23,974 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-19 14:43:23,974 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-19 14:43:23,975 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 14:43:23,975 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 14:43:23,976 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 14:43:23,976 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 14:43:23,976 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 14:43:23,977 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 14:43:23,977 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 14:43:23,977 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 14:43:23,977 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 14:43:23,978 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 14:43:23,978 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 14:43:23,978 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 14:43:23,979 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 14:43:23,979 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 14:43:23,979 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 14:43:23,979 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:43:23,980 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 14:43:23,980 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 14:43:23,981 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 14:43:23,981 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-19 14:43:23,981 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 14:43:23,981 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 14:43:23,982 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 14:43:23,982 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 14:43:23,982 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_e173e06f-d421-459d-8e41-451c2a26a282/bin/utaipan-UbGMyvGFUs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e173e06f-d421-459d-8e41-451c2a26a282/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 23a748a14ab5667159adb09776d3545981eaa20034460211a51a13329e4251e4 [2021-11-19 14:43:24,358 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 14:43:24,406 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 14:43:24,409 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 14:43:24,410 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 14:43:24,412 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 14:43:24,413 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e173e06f-d421-459d-8e41-451c2a26a282/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/combinations/Problem05_label46+token_ring.07.cil-1.c [2021-11-19 14:43:24,483 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e173e06f-d421-459d-8e41-451c2a26a282/bin/utaipan-UbGMyvGFUs/data/30ad648d6/3c0a453ada9247d7a3fcc9e84fb24866/FLAG449d1b25f [2021-11-19 14:43:25,752 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 14:43:25,753 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e173e06f-d421-459d-8e41-451c2a26a282/sv-benchmarks/c/combinations/Problem05_label46+token_ring.07.cil-1.c [2021-11-19 14:43:25,815 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e173e06f-d421-459d-8e41-451c2a26a282/bin/utaipan-UbGMyvGFUs/data/30ad648d6/3c0a453ada9247d7a3fcc9e84fb24866/FLAG449d1b25f [2021-11-19 14:43:25,914 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e173e06f-d421-459d-8e41-451c2a26a282/bin/utaipan-UbGMyvGFUs/data/30ad648d6/3c0a453ada9247d7a3fcc9e84fb24866 [2021-11-19 14:43:25,917 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 14:43:25,920 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 14:43:25,924 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 14:43:25,925 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 14:43:25,929 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 14:43:25,930 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:43:25" (1/1) ... [2021-11-19 14:43:25,931 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@132a6786 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:43:25, skipping insertion in model container [2021-11-19 14:43:25,931 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:43:25" (1/1) ... [2021-11-19 14:43:25,941 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 14:43:26,243 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:43:29,067 WARN L230 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_e173e06f-d421-459d-8e41-451c2a26a282/sv-benchmarks/c/combinations/Problem05_label46+token_ring.07.cil-1.c[382357,382370] [2021-11-19 14:43:29,103 WARN L230 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_e173e06f-d421-459d-8e41-451c2a26a282/sv-benchmarks/c/combinations/Problem05_label46+token_ring.07.cil-1.c[383339,383352] [2021-11-19 14:43:29,454 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:43:29,466 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 14:43:30,961 WARN L230 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_e173e06f-d421-459d-8e41-451c2a26a282/sv-benchmarks/c/combinations/Problem05_label46+token_ring.07.cil-1.c[382357,382370] [2021-11-19 14:43:30,964 WARN L230 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_e173e06f-d421-459d-8e41-451c2a26a282/sv-benchmarks/c/combinations/Problem05_label46+token_ring.07.cil-1.c[383339,383352] [2021-11-19 14:43:31,010 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:43:31,118 INFO L208 MainTranslator]: Completed translation [2021-11-19 14:43:31,119 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:43:31 WrapperNode [2021-11-19 14:43:31,119 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 14:43:31,121 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 14:43:31,121 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 14:43:31,122 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 14:43:31,153 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:43:31" (1/1) ... [2021-11-19 14:43:31,400 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:43:31" (1/1) ... [2021-11-19 14:43:31,974 INFO L137 Inliner]: procedures = 58, calls = 62, calls flagged for inlining = 36, calls inlined = 36, statements flattened = 12909 [2021-11-19 14:43:31,975 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 14:43:31,976 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 14:43:31,976 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 14:43:31,976 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 14:43:31,987 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:43:31" (1/1) ... [2021-11-19 14:43:31,987 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:43:31" (1/1) ... [2021-11-19 14:43:32,051 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:43:31" (1/1) ... [2021-11-19 14:43:32,052 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:43:31" (1/1) ... [2021-11-19 14:43:32,464 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:43:31" (1/1) ... [2021-11-19 14:43:32,605 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:43:31" (1/1) ... [2021-11-19 14:43:32,749 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:43:31" (1/1) ... [2021-11-19 14:43:32,876 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 14:43:32,877 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 14:43:32,890 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 14:43:32,890 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 14:43:32,891 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:43:31" (1/1) ... [2021-11-19 14:43:32,900 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:43:32,928 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e173e06f-d421-459d-8e41-451c2a26a282/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:43:32,972 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e173e06f-d421-459d-8e41-451c2a26a282/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 14:43:33,046 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e173e06f-d421-459d-8e41-451c2a26a282/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 14:43:33,122 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 14:43:33,122 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2021-11-19 14:43:33,122 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2021-11-19 14:43:33,123 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-11-19 14:43:33,123 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-11-19 14:43:33,123 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2021-11-19 14:43:33,123 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2021-11-19 14:43:33,123 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2021-11-19 14:43:33,124 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2021-11-19 14:43:33,124 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2021-11-19 14:43:33,124 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2021-11-19 14:43:33,124 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2021-11-19 14:43:33,124 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2021-11-19 14:43:33,125 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-19 14:43:33,125 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 14:43:33,125 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 14:43:33,378 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 14:43:33,392 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 14:43:42,546 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 14:43:45,037 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 14:43:45,037 INFO L301 CfgBuilder]: Removed 11 assume(true) statements. [2021-11-19 14:43:45,044 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 02:43:45 BoogieIcfgContainer [2021-11-19 14:43:45,044 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 14:43:45,046 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 14:43:45,046 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 14:43:45,052 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 14:43:45,052 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 02:43:25" (1/3) ... [2021-11-19 14:43:45,053 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@178bfc66 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 02:43:45, skipping insertion in model container [2021-11-19 14:43:45,053 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:43:31" (2/3) ... [2021-11-19 14:43:45,054 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@178bfc66 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 02:43:45, skipping insertion in model container [2021-11-19 14:43:45,054 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 02:43:45" (3/3) ... [2021-11-19 14:43:45,056 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem05_label46+token_ring.07.cil-1.c [2021-11-19 14:43:45,062 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 14:43:45,062 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-19 14:43:45,127 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 14:43:45,135 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-11-19 14:43:45,135 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-19 14:43:45,196 INFO L276 IsEmpty]: Start isEmpty. Operand has 1776 states, 1746 states have (on average 1.9662084765177548) internal successors, (3433), 1749 states have internal predecessors, (3433), 21 states have call successors, (21), 6 states have call predecessors, (21), 6 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2021-11-19 14:43:45,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-19 14:43:45,207 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:43:45,208 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:43:45,208 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:43:45,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:43:45,214 INFO L85 PathProgramCache]: Analyzing trace with hash -1084369947, now seen corresponding path program 1 times [2021-11-19 14:43:45,225 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:43:45,226 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100995278] [2021-11-19 14:43:45,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:43:45,227 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:43:45,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:43:45,621 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:43:45,622 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:43:45,622 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100995278] [2021-11-19 14:43:45,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100995278] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 14:43:45,624 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:43:45,624 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 14:43:45,640 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421481435] [2021-11-19 14:43:45,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:43:45,645 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:43:45,645 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:43:45,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:43:45,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 14:43:45,684 INFO L87 Difference]: Start difference. First operand has 1776 states, 1746 states have (on average 1.9662084765177548) internal successors, (3433), 1749 states have internal predecessors, (3433), 21 states have call successors, (21), 6 states have call predecessors, (21), 6 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) Second operand has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-19 14:43:46,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:43:46,879 INFO L93 Difference]: Finished difference Result 3668 states and 7147 transitions. [2021-11-19 14:43:46,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:43:46,884 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 52 [2021-11-19 14:43:46,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:43:46,921 INFO L225 Difference]: With dead ends: 3668 [2021-11-19 14:43:46,921 INFO L226 Difference]: Without dead ends: 1891 [2021-11-19 14:43:46,937 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 14:43:46,941 INFO L933 BasicCegarLoop]: 3361 mSDtfsCounter, 3614 mSDsluCounter, 3561 mSDsCounter, 0 mSdLazyCounter, 646 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3614 SdHoareTripleChecker+Valid, 6644 SdHoareTripleChecker+Invalid, 660 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 646 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-19 14:43:46,942 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3614 Valid, 6644 Invalid, 660 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [14 Valid, 646 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-19 14:43:46,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1891 states. [2021-11-19 14:43:47,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1891 to 1890. [2021-11-19 14:43:47,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1890 states, 1838 states have (on average 1.9368879216539716) internal successors, (3560), 1841 states have internal predecessors, (3560), 38 states have call successors, (38), 12 states have call predecessors, (38), 12 states have return successors, (38), 37 states have call predecessors, (38), 38 states have call successors, (38) [2021-11-19 14:43:47,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1890 states to 1890 states and 3636 transitions. [2021-11-19 14:43:47,104 INFO L78 Accepts]: Start accepts. Automaton has 1890 states and 3636 transitions. Word has length 52 [2021-11-19 14:43:47,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:43:47,105 INFO L470 AbstractCegarLoop]: Abstraction has 1890 states and 3636 transitions. [2021-11-19 14:43:47,105 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-19 14:43:47,106 INFO L276 IsEmpty]: Start isEmpty. Operand 1890 states and 3636 transitions. [2021-11-19 14:43:47,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-19 14:43:47,120 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:43:47,121 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:43:47,121 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-19 14:43:47,122 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:43:47,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:43:47,125 INFO L85 PathProgramCache]: Analyzing trace with hash -1234208912, now seen corresponding path program 1 times [2021-11-19 14:43:47,126 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:43:47,126 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509285461] [2021-11-19 14:43:47,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:43:47,127 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:43:47,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:43:47,347 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 14:43:47,349 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:43:47,350 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509285461] [2021-11-19 14:43:47,350 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509285461] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 14:43:47,350 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382520197] [2021-11-19 14:43:47,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:43:47,352 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:43:47,352 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e173e06f-d421-459d-8e41-451c2a26a282/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:43:47,358 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e173e06f-d421-459d-8e41-451c2a26a282/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:43:47,363 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e173e06f-d421-459d-8e41-451c2a26a282/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-19 14:43:47,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:43:47,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 702 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 14:43:47,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:43:48,003 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-19 14:43:48,004 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:43:48,259 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-19 14:43:48,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [382520197] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:43:48,265 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-19 14:43:48,265 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5, 4] total 7 [2021-11-19 14:43:48,266 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983962442] [2021-11-19 14:43:48,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:43:48,269 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 14:43:48,269 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:43:48,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 14:43:48,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:43:48,277 INFO L87 Difference]: Start difference. First operand 1890 states and 3636 transitions. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 2 states have internal predecessors, (62), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-19 14:43:48,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:43:48,868 INFO L93 Difference]: Finished difference Result 2371 states and 4365 transitions. [2021-11-19 14:43:48,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:43:48,869 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 2 states have internal predecessors, (62), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 101 [2021-11-19 14:43:48,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:43:48,888 INFO L225 Difference]: With dead ends: 2371 [2021-11-19 14:43:48,889 INFO L226 Difference]: Without dead ends: 2127 [2021-11-19 14:43:48,891 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 199 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:43:48,893 INFO L933 BasicCegarLoop]: 3258 mSDtfsCounter, 3438 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3438 SdHoareTripleChecker+Valid, 3408 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-19 14:43:48,893 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3438 Valid, 3408 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 286 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-19 14:43:48,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2127 states. [2021-11-19 14:43:48,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2127 to 2123. [2021-11-19 14:43:48,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2123 states, 2027 states have (on average 1.892945239269857) internal successors, (3837), 2031 states have internal predecessors, (3837), 70 states have call successors, (70), 24 states have call predecessors, (70), 24 states have return successors, (70), 68 states have call predecessors, (70), 70 states have call successors, (70) [2021-11-19 14:43:48,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2123 states to 2123 states and 3977 transitions. [2021-11-19 14:43:48,995 INFO L78 Accepts]: Start accepts. Automaton has 2123 states and 3977 transitions. Word has length 101 [2021-11-19 14:43:48,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:43:48,996 INFO L470 AbstractCegarLoop]: Abstraction has 2123 states and 3977 transitions. [2021-11-19 14:43:48,996 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 2 states have internal predecessors, (62), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-19 14:43:48,997 INFO L276 IsEmpty]: Start isEmpty. Operand 2123 states and 3977 transitions. [2021-11-19 14:43:49,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-19 14:43:49,000 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:43:49,001 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:43:49,054 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e173e06f-d421-459d-8e41-451c2a26a282/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-11-19 14:43:49,220 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e173e06f-d421-459d-8e41-451c2a26a282/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:43:49,220 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:43:49,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:43:49,221 INFO L85 PathProgramCache]: Analyzing trace with hash 450337902, now seen corresponding path program 1 times [2021-11-19 14:43:49,221 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:43:49,222 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232332780] [2021-11-19 14:43:49,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:43:49,222 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:43:49,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:43:49,389 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 14:43:49,389 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:43:49,389 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232332780] [2021-11-19 14:43:49,389 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232332780] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 14:43:49,390 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596915159] [2021-11-19 14:43:49,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:43:49,390 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:43:49,390 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e173e06f-d421-459d-8e41-451c2a26a282/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:43:49,391 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e173e06f-d421-459d-8e41-451c2a26a282/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:43:49,394 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e173e06f-d421-459d-8e41-451c2a26a282/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-19 14:43:49,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:43:49,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 696 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 14:43:49,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:43:49,806 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-19 14:43:49,806 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:43:50,086 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-19 14:43:50,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [596915159] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:43:50,086 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-19 14:43:50,086 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5, 4] total 7 [2021-11-19 14:43:50,087 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29784980] [2021-11-19 14:43:50,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:43:50,089 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 14:43:50,089 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:43:50,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 14:43:50,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:43:50,090 INFO L87 Difference]: Start difference. First operand 2123 states and 3977 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 2 states have internal predecessors, (65), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-19 14:43:50,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:43:50,684 INFO L93 Difference]: Finished difference Result 3064 states and 5396 transitions. [2021-11-19 14:43:50,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:43:50,685 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 2 states have internal predecessors, (65), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 101 [2021-11-19 14:43:50,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:43:50,711 INFO L225 Difference]: With dead ends: 3064 [2021-11-19 14:43:50,711 INFO L226 Difference]: Without dead ends: 2587 [2021-11-19 14:43:50,715 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 199 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:43:50,718 INFO L933 BasicCegarLoop]: 3230 mSDtfsCounter, 3435 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3435 SdHoareTripleChecker+Valid, 3380 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 14:43:50,720 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3435 Valid, 3380 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-19 14:43:50,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2587 states. [2021-11-19 14:43:50,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2587 to 2581. [2021-11-19 14:43:50,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2581 states, 2399 states have (on average 1.8253438932888704) internal successors, (4379), 2405 states have internal predecessors, (4379), 132 states have call successors, (132), 48 states have call predecessors, (132), 48 states have return successors, (132), 128 states have call predecessors, (132), 132 states have call successors, (132) [2021-11-19 14:43:50,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2581 states to 2581 states and 4643 transitions. [2021-11-19 14:43:50,882 INFO L78 Accepts]: Start accepts. Automaton has 2581 states and 4643 transitions. Word has length 101 [2021-11-19 14:43:50,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:43:50,882 INFO L470 AbstractCegarLoop]: Abstraction has 2581 states and 4643 transitions. [2021-11-19 14:43:50,883 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 2 states have internal predecessors, (65), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-19 14:43:50,883 INFO L276 IsEmpty]: Start isEmpty. Operand 2581 states and 4643 transitions. [2021-11-19 14:43:50,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-19 14:43:50,888 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:43:50,888 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:43:50,925 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e173e06f-d421-459d-8e41-451c2a26a282/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-19 14:43:51,114 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e173e06f-d421-459d-8e41-451c2a26a282/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:43:51,115 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:43:51,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:43:51,115 INFO L85 PathProgramCache]: Analyzing trace with hash 953403440, now seen corresponding path program 1 times [2021-11-19 14:43:51,115 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:43:51,116 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572335096] [2021-11-19 14:43:51,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:43:51,116 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:43:51,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:43:51,247 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 14:43:51,247 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:43:51,248 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572335096] [2021-11-19 14:43:51,248 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572335096] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 14:43:51,248 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [604104981] [2021-11-19 14:43:51,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:43:51,248 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:43:51,249 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e173e06f-d421-459d-8e41-451c2a26a282/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:43:51,263 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e173e06f-d421-459d-8e41-451c2a26a282/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:43:51,300 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e173e06f-d421-459d-8e41-451c2a26a282/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-19 14:43:51,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:43:51,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 690 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 14:43:51,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:43:51,706 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-19 14:43:51,706 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:43:51,974 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-19 14:43:51,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [604104981] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:43:51,975 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-19 14:43:51,975 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5, 4] total 7 [2021-11-19 14:43:51,975 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755902936] [2021-11-19 14:43:51,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:43:51,977 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 14:43:51,977 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:43:51,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 14:43:51,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:43:51,979 INFO L87 Difference]: Start difference. First operand 2581 states and 4643 transitions. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 2 states have internal predecessors, (71), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-19 14:43:52,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:43:52,530 INFO L93 Difference]: Finished difference Result 4426 states and 7408 transitions. [2021-11-19 14:43:52,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:43:52,531 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 2 states have internal predecessors, (71), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 101 [2021-11-19 14:43:52,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:43:52,559 INFO L225 Difference]: With dead ends: 4426 [2021-11-19 14:43:52,560 INFO L226 Difference]: Without dead ends: 3491 [2021-11-19 14:43:52,571 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 199 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:43:52,575 INFO L933 BasicCegarLoop]: 3230 mSDtfsCounter, 3429 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3429 SdHoareTripleChecker+Valid, 3380 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 14:43:52,577 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3429 Valid, 3380 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-19 14:43:52,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3491 states. [2021-11-19 14:43:52,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3491 to 3481. [2021-11-19 14:43:52,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3481 states, 3131 states have (on average 1.7371446822101566) internal successors, (5439), 3141 states have internal predecessors, (5439), 252 states have call successors, (252), 96 states have call predecessors, (252), 96 states have return successors, (252), 244 states have call predecessors, (252), 252 states have call successors, (252) [2021-11-19 14:43:52,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3481 states to 3481 states and 5943 transitions. [2021-11-19 14:43:52,801 INFO L78 Accepts]: Start accepts. Automaton has 3481 states and 5943 transitions. Word has length 101 [2021-11-19 14:43:52,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:43:52,802 INFO L470 AbstractCegarLoop]: Abstraction has 3481 states and 5943 transitions. [2021-11-19 14:43:52,802 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 2 states have internal predecessors, (71), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-19 14:43:52,802 INFO L276 IsEmpty]: Start isEmpty. Operand 3481 states and 5943 transitions. [2021-11-19 14:43:52,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-19 14:43:52,810 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:43:52,810 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:43:52,854 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e173e06f-d421-459d-8e41-451c2a26a282/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-19 14:43:53,034 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e173e06f-d421-459d-8e41-451c2a26a282/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:43:53,035 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:43:53,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:43:53,035 INFO L85 PathProgramCache]: Analyzing trace with hash -482054798, now seen corresponding path program 1 times [2021-11-19 14:43:53,035 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:43:53,035 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425059744] [2021-11-19 14:43:53,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:43:53,036 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:43:53,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:43:53,115 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 14:43:53,116 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:43:53,116 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425059744] [2021-11-19 14:43:53,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425059744] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 14:43:53,116 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818164593] [2021-11-19 14:43:53,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:43:53,117 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:43:53,117 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e173e06f-d421-459d-8e41-451c2a26a282/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:43:53,118 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e173e06f-d421-459d-8e41-451c2a26a282/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:43:53,122 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e173e06f-d421-459d-8e41-451c2a26a282/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-19 14:43:53,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:43:53,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 684 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 14:43:53,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:43:53,473 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 14:43:53,473 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:43:53,677 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-19 14:43:53,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [818164593] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:43:53,678 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-19 14:43:53,678 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5, 4] total 7 [2021-11-19 14:43:53,678 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264042448] [2021-11-19 14:43:53,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:43:53,679 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 14:43:53,679 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:43:53,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 14:43:53,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:43:53,680 INFO L87 Difference]: Start difference. First operand 3481 states and 5943 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 2 states have internal predecessors, (77), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-19 14:43:54,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:43:54,283 INFO L93 Difference]: Finished difference Result 7102 states and 11332 transitions. [2021-11-19 14:43:54,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:43:54,284 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 2 states have internal predecessors, (77), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 101 [2021-11-19 14:43:54,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:43:54,324 INFO L225 Difference]: With dead ends: 7102 [2021-11-19 14:43:54,324 INFO L226 Difference]: Without dead ends: 5267 [2021-11-19 14:43:54,334 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 199 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:43:54,335 INFO L933 BasicCegarLoop]: 3230 mSDtfsCounter, 3423 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3423 SdHoareTripleChecker+Valid, 3380 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 14:43:54,335 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3423 Valid, 3380 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-19 14:43:54,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5267 states. [2021-11-19 14:43:54,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5267 to 5249. [2021-11-19 14:43:54,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5249 states, 4571 states have (on average 1.643185298621746) internal successors, (7511), 4589 states have internal predecessors, (7511), 484 states have call successors, (484), 192 states have call predecessors, (484), 192 states have return successors, (484), 468 states have call predecessors, (484), 484 states have call successors, (484) [2021-11-19 14:43:54,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5249 states to 5249 states and 8479 transitions. [2021-11-19 14:43:54,599 INFO L78 Accepts]: Start accepts. Automaton has 5249 states and 8479 transitions. Word has length 101 [2021-11-19 14:43:54,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:43:54,599 INFO L470 AbstractCegarLoop]: Abstraction has 5249 states and 8479 transitions. [2021-11-19 14:43:54,600 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 2 states have internal predecessors, (77), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-19 14:43:54,600 INFO L276 IsEmpty]: Start isEmpty. Operand 5249 states and 8479 transitions. [2021-11-19 14:43:54,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-19 14:43:54,609 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:43:54,609 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:43:54,647 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e173e06f-d421-459d-8e41-451c2a26a282/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-19 14:43:54,823 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e173e06f-d421-459d-8e41-451c2a26a282/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:43:54,823 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:43:54,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:43:54,824 INFO L85 PathProgramCache]: Analyzing trace with hash -1016943564, now seen corresponding path program 1 times [2021-11-19 14:43:54,824 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:43:54,824 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020196809] [2021-11-19 14:43:54,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:43:54,825 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:43:54,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:43:54,892 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-19 14:43:54,892 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:43:54,892 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020196809] [2021-11-19 14:43:54,893 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020196809] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 14:43:54,893 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:43:54,893 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 14:43:54,893 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401753970] [2021-11-19 14:43:54,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:43:54,894 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 14:43:54,894 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:43:54,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 14:43:54,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 14:43:54,895 INFO L87 Difference]: Start difference. First operand 5249 states and 8479 transitions. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-19 14:43:55,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:43:55,583 INFO L93 Difference]: Finished difference Result 8051 states and 12672 transitions. [2021-11-19 14:43:55,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:43:55,583 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 101 [2021-11-19 14:43:55,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:43:55,636 INFO L225 Difference]: With dead ends: 8051 [2021-11-19 14:43:55,636 INFO L226 Difference]: Without dead ends: 6209 [2021-11-19 14:43:55,645 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 14:43:55,649 INFO L933 BasicCegarLoop]: 3300 mSDtfsCounter, 82 mSDsluCounter, 3463 mSDsCounter, 0 mSdLazyCounter, 512 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 6522 SdHoareTripleChecker+Invalid, 512 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-19 14:43:55,649 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 6522 Invalid, 512 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 512 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-19 14:43:55,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6209 states. [2021-11-19 14:43:56,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6209 to 5889. [2021-11-19 14:43:56,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5889 states, 5179 states have (on average 1.6510909441977215) internal successors, (8551), 5197 states have internal predecessors, (8551), 500 states have call successors, (500), 208 states have call predecessors, (500), 208 states have return successors, (500), 484 states have call predecessors, (500), 500 states have call successors, (500) [2021-11-19 14:43:56,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5889 states to 5889 states and 9551 transitions. [2021-11-19 14:43:56,069 INFO L78 Accepts]: Start accepts. Automaton has 5889 states and 9551 transitions. Word has length 101 [2021-11-19 14:43:56,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:43:56,070 INFO L470 AbstractCegarLoop]: Abstraction has 5889 states and 9551 transitions. [2021-11-19 14:43:56,071 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-19 14:43:56,071 INFO L276 IsEmpty]: Start isEmpty. Operand 5889 states and 9551 transitions. [2021-11-19 14:43:56,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-11-19 14:43:56,087 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:43:56,088 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:43:56,088 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-19 14:43:56,088 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:43:56,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:43:56,089 INFO L85 PathProgramCache]: Analyzing trace with hash -1067885439, now seen corresponding path program 1 times [2021-11-19 14:43:56,089 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:43:56,089 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349655670] [2021-11-19 14:43:56,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:43:56,090 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:43:56,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:43:56,188 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-11-19 14:43:56,188 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:43:56,188 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349655670] [2021-11-19 14:43:56,190 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349655670] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 14:43:56,190 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:43:56,190 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 14:43:56,190 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473636069] [2021-11-19 14:43:56,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:43:56,191 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 14:43:56,191 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:43:56,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 14:43:56,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 14:43:56,192 INFO L87 Difference]: Start difference. First operand 5889 states and 9551 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-19 14:43:56,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:43:56,918 INFO L93 Difference]: Finished difference Result 14230 states and 22100 transitions. [2021-11-19 14:43:56,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:43:56,919 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 136 [2021-11-19 14:43:56,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:43:56,997 INFO L225 Difference]: With dead ends: 14230 [2021-11-19 14:43:56,998 INFO L226 Difference]: Without dead ends: 9987 [2021-11-19 14:43:57,017 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 14:43:57,018 INFO L933 BasicCegarLoop]: 3232 mSDtfsCounter, 3427 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3427 SdHoareTripleChecker+Valid, 3382 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 14:43:57,019 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3427 Valid, 3382 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 281 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-19 14:43:57,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9987 states. [2021-11-19 14:43:57,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9987 to 9937. [2021-11-19 14:43:57,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9937 states, 8555 states have (on average 1.5793103448275863) internal successors, (13511), 8589 states have internal predecessors, (13511), 964 states have call successors, (964), 416 states have call predecessors, (964), 416 states have return successors, (964), 932 states have call predecessors, (964), 964 states have call successors, (964) [2021-11-19 14:43:57,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9937 states to 9937 states and 15439 transitions. [2021-11-19 14:43:57,476 INFO L78 Accepts]: Start accepts. Automaton has 9937 states and 15439 transitions. Word has length 136 [2021-11-19 14:43:57,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:43:57,477 INFO L470 AbstractCegarLoop]: Abstraction has 9937 states and 15439 transitions. [2021-11-19 14:43:57,477 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-19 14:43:57,477 INFO L276 IsEmpty]: Start isEmpty. Operand 9937 states and 15439 transitions. [2021-11-19 14:43:57,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-11-19 14:43:57,511 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:43:57,512 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:43:57,512 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-19 14:43:57,512 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:43:57,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:43:57,513 INFO L85 PathProgramCache]: Analyzing trace with hash 979900197, now seen corresponding path program 1 times [2021-11-19 14:43:57,513 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:43:57,513 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34830851] [2021-11-19 14:43:57,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:43:57,514 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:43:57,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:43:57,610 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-11-19 14:43:57,610 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:43:57,610 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34830851] [2021-11-19 14:43:57,614 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34830851] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 14:43:57,614 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:43:57,615 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 14:43:57,615 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706915425] [2021-11-19 14:43:57,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:43:57,616 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 14:43:57,616 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:43:57,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 14:43:57,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 14:43:57,617 INFO L87 Difference]: Start difference. First operand 9937 states and 15439 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-19 14:43:58,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:43:58,534 INFO L93 Difference]: Finished difference Result 26230 states and 39732 transitions. [2021-11-19 14:43:58,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:43:58,535 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 136 [2021-11-19 14:43:58,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:43:58,633 INFO L225 Difference]: With dead ends: 26230 [2021-11-19 14:43:58,633 INFO L226 Difference]: Without dead ends: 17939 [2021-11-19 14:43:58,677 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 14:43:58,678 INFO L933 BasicCegarLoop]: 3232 mSDtfsCounter, 3429 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3429 SdHoareTripleChecker+Valid, 3382 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 14:43:58,678 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3429 Valid, 3382 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 281 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-19 14:43:58,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17939 states. [2021-11-19 14:43:59,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17939 to 17841. [2021-11-19 14:43:59,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17841 states, 15147 states have (on average 1.5257806826434277) internal successors, (23111), 15213 states have internal predecessors, (23111), 1860 states have call successors, (1860), 832 states have call predecessors, (1860), 832 states have return successors, (1860), 1796 states have call predecessors, (1860), 1860 states have call successors, (1860) [2021-11-19 14:43:59,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17841 states to 17841 states and 26831 transitions. [2021-11-19 14:43:59,628 INFO L78 Accepts]: Start accepts. Automaton has 17841 states and 26831 transitions. Word has length 136 [2021-11-19 14:43:59,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:43:59,630 INFO L470 AbstractCegarLoop]: Abstraction has 17841 states and 26831 transitions. [2021-11-19 14:43:59,631 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-19 14:43:59,631 INFO L276 IsEmpty]: Start isEmpty. Operand 17841 states and 26831 transitions. [2021-11-19 14:43:59,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-11-19 14:43:59,694 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:43:59,694 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:43:59,694 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-19 14:43:59,695 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:43:59,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:43:59,706 INFO L85 PathProgramCache]: Analyzing trace with hash -1927206958, now seen corresponding path program 1 times [2021-11-19 14:43:59,706 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:43:59,706 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051331182] [2021-11-19 14:43:59,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:43:59,707 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:43:59,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:43:59,788 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-11-19 14:43:59,788 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:43:59,788 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051331182] [2021-11-19 14:43:59,788 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051331182] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 14:43:59,789 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:43:59,789 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 14:43:59,789 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691576545] [2021-11-19 14:43:59,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:43:59,790 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 14:43:59,790 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:43:59,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 14:43:59,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 14:43:59,791 INFO L87 Difference]: Start difference. First operand 17841 states and 26831 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-19 14:44:01,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:44:01,288 INFO L93 Difference]: Finished difference Result 49654 states and 73812 transitions. [2021-11-19 14:44:01,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:44:01,289 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 136 [2021-11-19 14:44:01,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:44:01,459 INFO L225 Difference]: With dead ends: 49654 [2021-11-19 14:44:01,460 INFO L226 Difference]: Without dead ends: 33459 [2021-11-19 14:44:01,542 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 14:44:01,544 INFO L933 BasicCegarLoop]: 3240 mSDtfsCounter, 3432 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3432 SdHoareTripleChecker+Valid, 3390 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 14:44:01,545 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3432 Valid, 3390 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 281 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-19 14:44:01,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33459 states. [2021-11-19 14:44:03,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33459 to 33265. [2021-11-19 14:44:03,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33265 states, 28011 states have (on average 1.4876655599585877) internal successors, (41671), 28141 states have internal predecessors, (41671), 3588 states have call successors, (3588), 1664 states have call predecessors, (3588), 1664 states have return successors, (3588), 3460 states have call predecessors, (3588), 3588 states have call successors, (3588) [2021-11-19 14:44:03,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33265 states to 33265 states and 48847 transitions. [2021-11-19 14:44:03,495 INFO L78 Accepts]: Start accepts. Automaton has 33265 states and 48847 transitions. Word has length 136 [2021-11-19 14:44:03,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:44:03,496 INFO L470 AbstractCegarLoop]: Abstraction has 33265 states and 48847 transitions. [2021-11-19 14:44:03,496 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-19 14:44:03,496 INFO L276 IsEmpty]: Start isEmpty. Operand 33265 states and 48847 transitions. [2021-11-19 14:44:03,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-11-19 14:44:03,654 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:44:03,654 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:44:03,655 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-19 14:44:03,655 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:44:03,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:44:03,656 INFO L85 PathProgramCache]: Analyzing trace with hash 8907911, now seen corresponding path program 1 times [2021-11-19 14:44:03,656 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:44:03,656 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274256085] [2021-11-19 14:44:03,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:44:03,657 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:44:03,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:44:03,890 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2021-11-19 14:44:03,891 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:44:03,891 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274256085] [2021-11-19 14:44:03,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274256085] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 14:44:03,891 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:44:03,891 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 14:44:03,892 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290422619] [2021-11-19 14:44:03,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:44:03,892 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 14:44:03,893 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:44:03,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 14:44:03,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 14:44:03,894 INFO L87 Difference]: Start difference. First operand 33265 states and 48847 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 3 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-19 14:44:06,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:44:06,185 INFO L93 Difference]: Finished difference Result 84725 states and 125265 transitions. [2021-11-19 14:44:06,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:44:06,185 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 3 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 156 [2021-11-19 14:44:06,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:44:06,597 INFO L225 Difference]: With dead ends: 84725 [2021-11-19 14:44:06,597 INFO L226 Difference]: Without dead ends: 53107 [2021-11-19 14:44:06,668 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 14:44:06,669 INFO L933 BasicCegarLoop]: 3255 mSDtfsCounter, 92 mSDsluCounter, 3459 mSDsCounter, 0 mSdLazyCounter, 496 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 6475 SdHoareTripleChecker+Invalid, 499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 496 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-19 14:44:06,670 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 6475 Invalid, 499 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 496 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-19 14:44:06,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53107 states. [2021-11-19 14:44:08,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53107 to 46585. [2021-11-19 14:44:08,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46585 states, 40559 states have (on average 1.5482383687960748) internal successors, (62795), 40690 states have internal predecessors, (62795), 3974 states have call successors, (3974), 2050 states have call predecessors, (3974), 2050 states have return successors, (3974), 3845 states have call predecessors, (3974), 3974 states have call successors, (3974) [2021-11-19 14:44:09,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46585 states to 46585 states and 70743 transitions. [2021-11-19 14:44:09,013 INFO L78 Accepts]: Start accepts. Automaton has 46585 states and 70743 transitions. Word has length 156 [2021-11-19 14:44:09,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:44:09,014 INFO L470 AbstractCegarLoop]: Abstraction has 46585 states and 70743 transitions. [2021-11-19 14:44:09,014 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 3 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-19 14:44:09,014 INFO L276 IsEmpty]: Start isEmpty. Operand 46585 states and 70743 transitions. [2021-11-19 14:44:09,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-11-19 14:44:09,156 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:44:09,157 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:44:09,157 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-19 14:44:09,158 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:44:09,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:44:09,158 INFO L85 PathProgramCache]: Analyzing trace with hash 888066141, now seen corresponding path program 2 times [2021-11-19 14:44:09,159 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:44:09,159 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470107829] [2021-11-19 14:44:09,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:44:09,159 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:44:09,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:44:09,261 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2021-11-19 14:44:09,261 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:44:09,261 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470107829] [2021-11-19 14:44:09,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470107829] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 14:44:09,262 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210096230] [2021-11-19 14:44:09,262 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 14:44:09,262 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:44:09,262 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e173e06f-d421-459d-8e41-451c2a26a282/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:44:09,267 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e173e06f-d421-459d-8e41-451c2a26a282/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:44:09,282 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e173e06f-d421-459d-8e41-451c2a26a282/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-19 14:44:09,664 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-19 14:44:09,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:44:09,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 905 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 14:44:09,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:44:10,026 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 84 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-19 14:44:10,027 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:44:10,360 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2021-11-19 14:44:10,361 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1210096230] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:44:10,361 INFO L186 FreeRefinementEngine]: Found 2 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:44:10,362 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5] total 7 [2021-11-19 14:44:10,365 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867555079] [2021-11-19 14:44:10,365 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:44:10,366 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:44:10,366 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:44:10,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:44:10,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:44:10,367 INFO L87 Difference]: Start difference. First operand 46585 states and 70743 transitions. Second operand has 4 states, 4 states have (on average 31.25) internal successors, (125), 4 states have internal predecessors, (125), 4 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2021-11-19 14:44:12,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:44:12,836 INFO L93 Difference]: Finished difference Result 91965 states and 139097 transitions. [2021-11-19 14:44:12,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:44:12,836 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 31.25) internal successors, (125), 4 states have internal predecessors, (125), 4 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) Word has length 156 [2021-11-19 14:44:12,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:44:13,199 INFO L225 Difference]: With dead ends: 91965 [2021-11-19 14:44:13,199 INFO L226 Difference]: Without dead ends: 69115 [2021-11-19 14:44:13,259 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 310 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:44:13,260 INFO L933 BasicCegarLoop]: 3343 mSDtfsCounter, 180 mSDsluCounter, 6969 mSDsCounter, 0 mSdLazyCounter, 772 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 9826 SdHoareTripleChecker+Invalid, 774 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 772 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-19 14:44:13,261 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [180 Valid, 9826 Invalid, 774 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 772 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-19 14:44:13,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69115 states. [2021-11-19 14:44:15,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69115 to 59129. [2021-11-19 14:44:15,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59129 states, 52335 states have (on average 1.5740708894621191) internal successors, (82379), 52466 states have internal predecessors, (82379), 4358 states have call successors, (4358), 2434 states have call predecessors, (4358), 2434 states have return successors, (4358), 4229 states have call predecessors, (4358), 4358 states have call successors, (4358) [2021-11-19 14:44:16,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59129 states to 59129 states and 91095 transitions. [2021-11-19 14:44:16,155 INFO L78 Accepts]: Start accepts. Automaton has 59129 states and 91095 transitions. Word has length 156 [2021-11-19 14:44:16,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:44:16,156 INFO L470 AbstractCegarLoop]: Abstraction has 59129 states and 91095 transitions. [2021-11-19 14:44:16,156 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.25) internal successors, (125), 4 states have internal predecessors, (125), 4 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2021-11-19 14:44:16,156 INFO L276 IsEmpty]: Start isEmpty. Operand 59129 states and 91095 transitions. [2021-11-19 14:44:16,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-11-19 14:44:16,299 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:44:16,299 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:44:16,344 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e173e06f-d421-459d-8e41-451c2a26a282/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-19 14:44:16,514 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e173e06f-d421-459d-8e41-451c2a26a282/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-19 14:44:16,514 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:44:16,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:44:16,515 INFO L85 PathProgramCache]: Analyzing trace with hash -1776291278, now seen corresponding path program 3 times [2021-11-19 14:44:16,515 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:44:16,515 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245659535] [2021-11-19 14:44:16,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:44:16,516 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:44:16,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:44:16,622 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 10 proven. 49 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-11-19 14:44:16,622 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:44:16,623 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245659535] [2021-11-19 14:44:16,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245659535] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 14:44:16,623 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188897047] [2021-11-19 14:44:16,623 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-19 14:44:16,624 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:44:16,624 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e173e06f-d421-459d-8e41-451c2a26a282/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:44:16,625 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e173e06f-d421-459d-8e41-451c2a26a282/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:44:16,648 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e173e06f-d421-459d-8e41-451c2a26a282/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-19 14:44:16,806 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-19 14:44:16,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:44:16,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 553 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:44:16,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:44:17,454 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 77 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-19 14:44:17,454 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:44:17,862 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-19 14:44:17,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1188897047] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:44:17,863 INFO L186 FreeRefinementEngine]: Found 2 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:44:17,863 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 4] imperfect sequences [6] total 8 [2021-11-19 14:44:17,864 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954659826] [2021-11-19 14:44:17,865 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:44:17,865 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:44:17,866 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:44:17,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:44:17,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-19 14:44:17,867 INFO L87 Difference]: Start difference. First operand 59129 states and 91095 transitions. Second operand has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-19 14:44:20,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:44:20,460 INFO L93 Difference]: Finished difference Result 88477 states and 137113 transitions. [2021-11-19 14:44:20,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:44:20,461 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 156 [2021-11-19 14:44:20,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:44:20,671 INFO L225 Difference]: With dead ends: 88477 [2021-11-19 14:44:20,672 INFO L226 Difference]: Without dead ends: 59259 [2021-11-19 14:44:20,737 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 312 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-19 14:44:20,739 INFO L933 BasicCegarLoop]: 3358 mSDtfsCounter, 3595 mSDsluCounter, 3554 mSDsCounter, 0 mSdLazyCounter, 630 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3595 SdHoareTripleChecker+Valid, 6642 SdHoareTripleChecker+Invalid, 633 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 630 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-19 14:44:20,739 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3595 Valid, 6642 Invalid, 633 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 630 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-19 14:44:20,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59259 states. [2021-11-19 14:44:22,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59259 to 58809. [2021-11-19 14:44:22,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58809 states, 52015 states have (on average 1.564068057291166) internal successors, (81355), 52146 states have internal predecessors, (81355), 4358 states have call successors, (4358), 2434 states have call predecessors, (4358), 2434 states have return successors, (4358), 4229 states have call predecessors, (4358), 4358 states have call successors, (4358) [2021-11-19 14:44:22,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58809 states to 58809 states and 90071 transitions. [2021-11-19 14:44:22,900 INFO L78 Accepts]: Start accepts. Automaton has 58809 states and 90071 transitions. Word has length 156 [2021-11-19 14:44:22,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:44:22,901 INFO L470 AbstractCegarLoop]: Abstraction has 58809 states and 90071 transitions. [2021-11-19 14:44:22,901 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-19 14:44:22,901 INFO L276 IsEmpty]: Start isEmpty. Operand 58809 states and 90071 transitions. [2021-11-19 14:44:23,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-11-19 14:44:23,018 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:44:23,018 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:44:23,056 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e173e06f-d421-459d-8e41-451c2a26a282/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-19 14:44:23,234 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e173e06f-d421-459d-8e41-451c2a26a282/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-19 14:44:23,234 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:44:23,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:44:23,235 INFO L85 PathProgramCache]: Analyzing trace with hash 1995355347, now seen corresponding path program 1 times [2021-11-19 14:44:23,235 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:44:23,235 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493894106] [2021-11-19 14:44:23,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:44:23,236 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:44:23,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:44:23,360 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 10 proven. 48 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-11-19 14:44:23,360 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:44:23,360 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493894106] [2021-11-19 14:44:23,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493894106] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 14:44:23,361 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468649553] [2021-11-19 14:44:23,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:44:23,361 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:44:23,361 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e173e06f-d421-459d-8e41-451c2a26a282/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:44:23,362 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e173e06f-d421-459d-8e41-451c2a26a282/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:44:23,761 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e173e06f-d421-459d-8e41-451c2a26a282/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-19 14:44:23,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:44:23,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 911 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 14:44:23,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:44:24,230 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 76 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-19 14:44:24,231 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:44:24,527 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-19 14:44:24,527 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [468649553] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:44:24,527 INFO L186 FreeRefinementEngine]: Found 2 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:44:24,527 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 4] imperfect sequences [6] total 8 [2021-11-19 14:44:24,528 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531147846] [2021-11-19 14:44:24,528 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:44:24,530 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:44:24,530 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:44:24,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:44:24,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-19 14:44:24,531 INFO L87 Difference]: Start difference. First operand 58809 states and 90071 transitions. Second operand has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-19 14:44:26,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:44:26,807 INFO L93 Difference]: Finished difference Result 95989 states and 144626 transitions. [2021-11-19 14:44:26,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:44:26,808 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 156 [2021-11-19 14:44:26,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:44:27,006 INFO L225 Difference]: With dead ends: 95989 [2021-11-19 14:44:27,007 INFO L226 Difference]: Without dead ends: 67251 [2021-11-19 14:44:27,087 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 311 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-19 14:44:27,088 INFO L933 BasicCegarLoop]: 3257 mSDtfsCounter, 3464 mSDsluCounter, 3460 mSDsCounter, 0 mSdLazyCounter, 557 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3464 SdHoareTripleChecker+Valid, 6469 SdHoareTripleChecker+Invalid, 562 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 557 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-19 14:44:27,089 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3464 Valid, 6469 Invalid, 562 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 557 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-19 14:44:27,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67251 states. [2021-11-19 14:44:29,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67251 to 67251. [2021-11-19 14:44:29,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67251 states, 59693 states have (on average 1.519390883353157) internal successors, (90697), 59824 states have internal predecessors, (90697), 4612 states have call successors, (4612), 2944 states have call predecessors, (4612), 2944 states have return successors, (4612), 4483 states have call predecessors, (4612), 4612 states have call successors, (4612) [2021-11-19 14:44:29,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67251 states to 67251 states and 99921 transitions. [2021-11-19 14:44:29,973 INFO L78 Accepts]: Start accepts. Automaton has 67251 states and 99921 transitions. Word has length 156 [2021-11-19 14:44:29,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:44:29,974 INFO L470 AbstractCegarLoop]: Abstraction has 67251 states and 99921 transitions. [2021-11-19 14:44:29,974 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-19 14:44:29,974 INFO L276 IsEmpty]: Start isEmpty. Operand 67251 states and 99921 transitions. [2021-11-19 14:44:30,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-11-19 14:44:30,133 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:44:30,133 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:44:30,173 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e173e06f-d421-459d-8e41-451c2a26a282/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-19 14:44:30,346 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e173e06f-d421-459d-8e41-451c2a26a282/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:44:30,346 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:44:30,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:44:30,347 INFO L85 PathProgramCache]: Analyzing trace with hash 1690649005, now seen corresponding path program 1 times [2021-11-19 14:44:30,347 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:44:30,347 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519757351] [2021-11-19 14:44:30,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:44:30,348 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:44:30,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:44:30,426 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 10 proven. 47 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-11-19 14:44:30,427 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:44:30,427 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519757351] [2021-11-19 14:44:30,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519757351] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 14:44:30,427 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768284793] [2021-11-19 14:44:30,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:44:30,427 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:44:30,428 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e173e06f-d421-459d-8e41-451c2a26a282/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:44:30,429 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e173e06f-d421-459d-8e41-451c2a26a282/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:44:30,445 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e173e06f-d421-459d-8e41-451c2a26a282/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-19 14:44:30,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:44:30,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 914 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-19 14:44:30,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:44:30,906 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 93 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-19 14:44:30,906 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:44:31,293 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 38 proven. 19 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-11-19 14:44:31,293 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [768284793] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:44:31,293 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-19 14:44:31,294 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 4] total 8 [2021-11-19 14:44:31,294 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311158604] [2021-11-19 14:44:31,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:44:31,295 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:44:31,295 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:44:31,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:44:31,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-19 14:44:31,296 INFO L87 Difference]: Start difference. First operand 67251 states and 99921 transitions. Second operand has 4 states, 4 states have (on average 30.75) internal successors, (123), 4 states have internal predecessors, (123), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-19 14:44:35,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:44:35,766 INFO L93 Difference]: Finished difference Result 199673 states and 294097 transitions. [2021-11-19 14:44:35,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 14:44:35,766 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 30.75) internal successors, (123), 4 states have internal predecessors, (123), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) Word has length 156 [2021-11-19 14:44:35,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:44:36,308 INFO L225 Difference]: With dead ends: 199673 [2021-11-19 14:44:36,308 INFO L226 Difference]: Without dead ends: 134069 [2021-11-19 14:44:36,444 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 320 GetRequests, 312 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:44:36,445 INFO L933 BasicCegarLoop]: 3384 mSDtfsCounter, 3460 mSDsluCounter, 3806 mSDsCounter, 0 mSdLazyCounter, 591 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3460 SdHoareTripleChecker+Valid, 6895 SdHoareTripleChecker+Invalid, 597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 591 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-19 14:44:36,445 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3460 Valid, 6895 Invalid, 597 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 591 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-19 14:44:36,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134069 states. [2021-11-19 14:44:41,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134069 to 133547. [2021-11-19 14:44:41,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133547 states, 118315 states have (on average 1.487072645057685) internal successors, (175943), 118831 states have internal predecessors, (175943), 9089 states have call successors, (9089), 5885 states have call predecessors, (9089), 6141 states have return successors, (10749), 8831 states have call predecessors, (10749), 9089 states have call successors, (10749) [2021-11-19 14:44:41,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133547 states to 133547 states and 195781 transitions. [2021-11-19 14:44:41,898 INFO L78 Accepts]: Start accepts. Automaton has 133547 states and 195781 transitions. Word has length 156 [2021-11-19 14:44:41,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:44:41,899 INFO L470 AbstractCegarLoop]: Abstraction has 133547 states and 195781 transitions. [2021-11-19 14:44:41,899 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.75) internal successors, (123), 4 states have internal predecessors, (123), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-19 14:44:41,900 INFO L276 IsEmpty]: Start isEmpty. Operand 133547 states and 195781 transitions. [2021-11-19 14:44:42,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-11-19 14:44:42,131 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:44:42,131 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:44:42,171 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e173e06f-d421-459d-8e41-451c2a26a282/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-19 14:44:42,354 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e173e06f-d421-459d-8e41-451c2a26a282/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-19 14:44:42,354 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:44:42,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:44:42,355 INFO L85 PathProgramCache]: Analyzing trace with hash -151664786, now seen corresponding path program 2 times [2021-11-19 14:44:42,355 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:44:42,355 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492255489] [2021-11-19 14:44:42,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:44:42,355 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:44:42,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:44:42,449 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 10 proven. 48 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-11-19 14:44:42,449 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:44:42,450 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492255489] [2021-11-19 14:44:42,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492255489] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 14:44:42,450 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191848396] [2021-11-19 14:44:42,450 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 14:44:42,450 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:44:42,451 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e173e06f-d421-459d-8e41-451c2a26a282/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:44:42,452 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e173e06f-d421-459d-8e41-451c2a26a282/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:44:42,472 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e173e06f-d421-459d-8e41-451c2a26a282/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-19 14:44:42,617 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-19 14:44:42,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:44:42,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 596 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:44:42,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:44:42,978 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 93 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-19 14:44:42,979 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:44:43,346 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 55 proven. 19 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-19 14:44:43,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1191848396] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:44:43,347 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-19 14:44:43,347 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6, 4] total 8 [2021-11-19 14:44:43,347 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721390199] [2021-11-19 14:44:43,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:44:43,348 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 14:44:43,348 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:44:43,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 14:44:43,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-19 14:44:43,349 INFO L87 Difference]: Start difference. First operand 133547 states and 195781 transitions. Second operand has 3 states, 3 states have (on average 41.0) internal successors, (123), 3 states have internal predecessors, (123), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10)