./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/Problem05_label46+token_ring.11.cil-2.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_19ffd25c-5d26-4631-b03e-8f1a8ac982a3/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ffd25c-5d26-4631-b03e-8f1a8ac982a3/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_19ffd25c-5d26-4631-b03e-8f1a8ac982a3/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ffd25c-5d26-4631-b03e-8f1a8ac982a3/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/Problem05_label46+token_ring.11.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ffd25c-5d26-4631-b03e-8f1a8ac982a3/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_19ffd25c-5d26-4631-b03e-8f1a8ac982a3/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 c748b455b85e8e0d3f42bb7ec9994b8706853b8413212fc1d08f459460f9e58b --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 15:00:05,606 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 15:00:05,608 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 15:00:05,673 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 15:00:05,675 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 15:00:05,681 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 15:00:05,684 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 15:00:05,687 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 15:00:05,690 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 15:00:05,692 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 15:00:05,694 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 15:00:05,696 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 15:00:05,697 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 15:00:05,698 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 15:00:05,701 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 15:00:05,703 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 15:00:05,704 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 15:00:05,706 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 15:00:05,709 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 15:00:05,713 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 15:00:05,716 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 15:00:05,718 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 15:00:05,720 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 15:00:05,722 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 15:00:05,727 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 15:00:05,728 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 15:00:05,728 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 15:00:05,730 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 15:00:05,731 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 15:00:05,733 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 15:00:05,733 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 15:00:05,735 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 15:00:05,736 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 15:00:05,737 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 15:00:05,739 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 15:00:05,740 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 15:00:05,741 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 15:00:05,742 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 15:00:05,742 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 15:00:05,744 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 15:00:05,745 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 15:00:05,747 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ffd25c-5d26-4631-b03e-8f1a8ac982a3/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-19 15:00:05,781 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 15:00:05,782 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 15:00:05,783 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 15:00:05,783 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 15:00:05,784 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 15:00:05,784 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 15:00:05,784 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 15:00:05,785 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-19 15:00:05,785 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 15:00:05,785 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 15:00:05,786 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-19 15:00:05,786 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-19 15:00:05,786 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 15:00:05,787 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-19 15:00:05,787 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-19 15:00:05,787 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-19 15:00:05,789 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 15:00:05,789 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 15:00:05,789 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 15:00:05,790 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 15:00:05,790 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 15:00:05,790 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 15:00:05,791 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 15:00:05,791 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 15:00:05,791 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 15:00:05,792 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 15:00:05,792 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 15:00:05,792 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 15:00:05,793 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 15:00:05,793 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 15:00:05,793 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 15:00:05,794 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 15:00:05,794 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 15:00:05,794 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 15:00:05,795 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 15:00:05,795 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-19 15:00:05,795 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 15:00:05,796 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 15:00:05,796 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 15:00:05,796 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 15:00:05,797 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_19ffd25c-5d26-4631-b03e-8f1a8ac982a3/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ffd25c-5d26-4631-b03e-8f1a8ac982a3/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c748b455b85e8e0d3f42bb7ec9994b8706853b8413212fc1d08f459460f9e58b [2021-11-19 15:00:06,172 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 15:00:06,221 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 15:00:06,225 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 15:00:06,226 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 15:00:06,227 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 15:00:06,229 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ffd25c-5d26-4631-b03e-8f1a8ac982a3/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/combinations/Problem05_label46+token_ring.11.cil-2.c [2021-11-19 15:00:06,309 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ffd25c-5d26-4631-b03e-8f1a8ac982a3/bin/utaipan-UbGMyvGFUs/data/74af2533b/a2a98c6764714d478aca61cb4414d085/FLAG493caba40 [2021-11-19 15:00:07,622 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 15:00:07,624 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ffd25c-5d26-4631-b03e-8f1a8ac982a3/sv-benchmarks/c/combinations/Problem05_label46+token_ring.11.cil-2.c [2021-11-19 15:00:07,694 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ffd25c-5d26-4631-b03e-8f1a8ac982a3/bin/utaipan-UbGMyvGFUs/data/74af2533b/a2a98c6764714d478aca61cb4414d085/FLAG493caba40 [2021-11-19 15:00:07,789 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ffd25c-5d26-4631-b03e-8f1a8ac982a3/bin/utaipan-UbGMyvGFUs/data/74af2533b/a2a98c6764714d478aca61cb4414d085 [2021-11-19 15:00:07,792 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 15:00:07,795 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 15:00:07,799 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 15:00:07,799 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 15:00:07,803 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 15:00:07,804 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 03:00:07" (1/1) ... [2021-11-19 15:00:07,807 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@13f34d60 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:00:07, skipping insertion in model container [2021-11-19 15:00:07,808 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 03:00:07" (1/1) ... [2021-11-19 15:00:07,817 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 15:00:08,136 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 15:00:11,040 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_19ffd25c-5d26-4631-b03e-8f1a8ac982a3/sv-benchmarks/c/combinations/Problem05_label46+token_ring.11.cil-2.c[382357,382370] [2021-11-19 15:00:11,071 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_19ffd25c-5d26-4631-b03e-8f1a8ac982a3/sv-benchmarks/c/combinations/Problem05_label46+token_ring.11.cil-2.c[383339,383352] [2021-11-19 15:00:11,539 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 15:00:11,551 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 15:00:13,064 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_19ffd25c-5d26-4631-b03e-8f1a8ac982a3/sv-benchmarks/c/combinations/Problem05_label46+token_ring.11.cil-2.c[382357,382370] [2021-11-19 15:00:13,080 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_19ffd25c-5d26-4631-b03e-8f1a8ac982a3/sv-benchmarks/c/combinations/Problem05_label46+token_ring.11.cil-2.c[383339,383352] [2021-11-19 15:00:13,178 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 15:00:13,264 INFO L208 MainTranslator]: Completed translation [2021-11-19 15:00:13,264 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:00:13 WrapperNode [2021-11-19 15:00:13,264 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 15:00:13,265 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 15:00:13,266 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 15:00:13,266 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 15:00:13,278 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:00:13" (1/1) ... [2021-11-19 15:00:13,433 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:00:13" (1/1) ... [2021-11-19 15:00:14,097 INFO L137 Inliner]: procedures = 66, calls = 74, calls flagged for inlining = 44, calls inlined = 44, statements flattened = 13141 [2021-11-19 15:00:14,097 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 15:00:14,098 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 15:00:14,098 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 15:00:14,099 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 15:00:14,110 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:00:13" (1/1) ... [2021-11-19 15:00:14,111 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:00:13" (1/1) ... [2021-11-19 15:00:14,262 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:00:13" (1/1) ... [2021-11-19 15:00:14,263 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:00:13" (1/1) ... [2021-11-19 15:00:14,677 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:00:13" (1/1) ... [2021-11-19 15:00:14,819 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:00:13" (1/1) ... [2021-11-19 15:00:14,871 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:00:13" (1/1) ... [2021-11-19 15:00:14,947 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 15:00:14,948 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 15:00:14,948 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 15:00:14,948 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 15:00:14,949 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:00:13" (1/1) ... [2021-11-19 15:00:14,959 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 15:00:14,972 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ffd25c-5d26-4631-b03e-8f1a8ac982a3/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 15:00:14,992 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ffd25c-5d26-4631-b03e-8f1a8ac982a3/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 15:00:15,009 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ffd25c-5d26-4631-b03e-8f1a8ac982a3/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 15:00:15,044 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 15:00:15,045 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2021-11-19 15:00:15,045 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2021-11-19 15:00:15,045 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-11-19 15:00:15,045 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-11-19 15:00:15,045 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2021-11-19 15:00:15,045 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2021-11-19 15:00:15,046 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2021-11-19 15:00:15,046 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2021-11-19 15:00:15,046 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2021-11-19 15:00:15,046 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2021-11-19 15:00:15,046 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2021-11-19 15:00:15,046 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2021-11-19 15:00:15,046 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-19 15:00:15,047 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 15:00:15,047 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 15:00:15,201 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 15:00:15,203 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 15:00:24,761 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 15:00:27,994 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 15:00:27,994 INFO L301 CfgBuilder]: Removed 15 assume(true) statements. [2021-11-19 15:00:28,002 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 03:00:28 BoogieIcfgContainer [2021-11-19 15:00:28,002 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 15:00:28,007 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 15:00:28,007 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 15:00:28,012 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 15:00:28,012 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 03:00:07" (1/3) ... [2021-11-19 15:00:28,013 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@545efb55 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 03:00:28, skipping insertion in model container [2021-11-19 15:00:28,013 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:00:13" (2/3) ... [2021-11-19 15:00:28,014 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@545efb55 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 03:00:28, skipping insertion in model container [2021-11-19 15:00:28,014 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 03:00:28" (3/3) ... [2021-11-19 15:00:28,016 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem05_label46+token_ring.11.cil-2.c [2021-11-19 15:00:28,027 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 15:00:28,027 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-19 15:00:28,112 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 15:00:28,123 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 15:00:28,123 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-19 15:00:28,230 INFO L276 IsEmpty]: Start isEmpty. Operand has 1820 states, 1786 states have (on average 1.958006718924972) internal successors, (3497), 1789 states have internal predecessors, (3497), 25 states have call successors, (25), 6 states have call predecessors, (25), 6 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2021-11-19 15:00:28,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-19 15:00:28,255 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:00:28,256 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:00:28,256 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:00:28,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:00:28,268 INFO L85 PathProgramCache]: Analyzing trace with hash -310457698, now seen corresponding path program 1 times [2021-11-19 15:00:28,277 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 15:00:28,277 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642972444] [2021-11-19 15:00:28,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:00:28,279 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 15:00:28,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:00:28,819 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 15:00:28,819 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 15:00:28,820 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642972444] [2021-11-19 15:00:28,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642972444] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 15:00:28,821 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:00:28,821 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 15:00:28,823 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593847365] [2021-11-19 15:00:28,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 15:00:28,845 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 15:00:28,845 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 15:00:28,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 15:00:28,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 15:00:28,886 INFO L87 Difference]: Start difference. First operand has 1820 states, 1786 states have (on average 1.958006718924972) internal successors, (3497), 1789 states have internal predecessors, (3497), 25 states have call successors, (25), 6 states have call predecessors, (25), 6 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 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 15:00:30,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:00:30,222 INFO L93 Difference]: Finished difference Result 3800 states and 7371 transitions. [2021-11-19 15:00:30,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 15:00:30,226 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 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 64 [2021-11-19 15:00:30,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:00:30,267 INFO L225 Difference]: With dead ends: 3800 [2021-11-19 15:00:30,267 INFO L226 Difference]: Without dead ends: 1979 [2021-11-19 15:00:30,282 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 15:00:30,286 INFO L933 BasicCegarLoop]: 3481 mSDtfsCounter, 3746 mSDsluCounter, 3689 mSDsCounter, 0 mSdLazyCounter, 710 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3746 SdHoareTripleChecker+Valid, 6868 SdHoareTripleChecker+Invalid, 724 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 710 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-19 15:00:30,288 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3746 Valid, 6868 Invalid, 724 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 710 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-19 15:00:30,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1979 states. [2021-11-19 15:00:30,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1979 to 1978. [2021-11-19 15:00:30,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1978 states, 1918 states have (on average 1.9228362877997915) internal successors, (3688), 1921 states have internal predecessors, (3688), 46 states have call successors, (46), 12 states have call predecessors, (46), 12 states have return successors, (46), 45 states have call predecessors, (46), 46 states have call successors, (46) [2021-11-19 15:00:30,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1978 states to 1978 states and 3780 transitions. [2021-11-19 15:00:30,477 INFO L78 Accepts]: Start accepts. Automaton has 1978 states and 3780 transitions. Word has length 64 [2021-11-19 15:00:30,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:00:30,478 INFO L470 AbstractCegarLoop]: Abstraction has 1978 states and 3780 transitions. [2021-11-19 15:00:30,478 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 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 15:00:30,479 INFO L276 IsEmpty]: Start isEmpty. Operand 1978 states and 3780 transitions. [2021-11-19 15:00:30,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-11-19 15:00:30,490 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:00:30,490 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, 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] [2021-11-19 15:00:30,491 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-19 15:00:30,491 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:00:30,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:00:30,493 INFO L85 PathProgramCache]: Analyzing trace with hash 1281392806, now seen corresponding path program 1 times [2021-11-19 15:00:30,493 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 15:00:30,493 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333203998] [2021-11-19 15:00:30,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:00:30,494 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 15:00:30,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:00:30,841 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 15:00:30,841 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 15:00:30,842 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333203998] [2021-11-19 15:00:30,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333203998] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 15:00:30,842 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400611193] [2021-11-19 15:00:30,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:00:30,843 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 15:00:30,843 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ffd25c-5d26-4631-b03e-8f1a8ac982a3/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 15:00:30,849 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ffd25c-5d26-4631-b03e-8f1a8ac982a3/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 15:00:30,851 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ffd25c-5d26-4631-b03e-8f1a8ac982a3/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-19 15:00:31,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:00:31,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 978 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 15:00:31,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:00:31,549 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-19 15:00:31,549 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:00:31,957 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-19 15:00:31,957 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1400611193] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 15:00:31,957 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-19 15:00:31,958 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5, 4] total 7 [2021-11-19 15:00:31,959 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243334318] [2021-11-19 15:00:31,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 15:00:31,960 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 15:00:31,960 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 15:00:31,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 15:00:31,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-19 15:00:31,962 INFO L87 Difference]: Start difference. First operand 1978 states and 3780 transitions. Second operand has 3 states, 3 states have (on average 29.0) internal successors, (87), 2 states have internal predecessors, (87), 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 15:00:32,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:00:32,677 INFO L93 Difference]: Finished difference Result 2635 states and 4805 transitions. [2021-11-19 15:00:32,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 15:00:32,679 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 2 states have internal predecessors, (87), 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 129 [2021-11-19 15:00:32,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:00:32,733 INFO L225 Difference]: With dead ends: 2635 [2021-11-19 15:00:32,734 INFO L226 Difference]: Without dead ends: 2303 [2021-11-19 15:00:32,738 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 255 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 15:00:32,741 INFO L933 BasicCegarLoop]: 3326 mSDtfsCounter, 3501 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 310 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3501 SdHoareTripleChecker+Valid, 3536 SdHoareTripleChecker+Invalid, 312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-19 15:00:32,754 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3501 Valid, 3536 Invalid, 312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 310 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-19 15:00:32,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2303 states. [2021-11-19 15:00:32,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2303 to 2299. [2021-11-19 15:00:32,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2299 states, 2187 states have (on average 1.8715134887974394) internal successors, (4093), 2191 states have internal predecessors, (4093), 86 states have call successors, (86), 24 states have call predecessors, (86), 24 states have return successors, (86), 84 states have call predecessors, (86), 86 states have call successors, (86) [2021-11-19 15:00:32,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2299 states to 2299 states and 4265 transitions. [2021-11-19 15:00:32,897 INFO L78 Accepts]: Start accepts. Automaton has 2299 states and 4265 transitions. Word has length 129 [2021-11-19 15:00:32,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:00:32,898 INFO L470 AbstractCegarLoop]: Abstraction has 2299 states and 4265 transitions. [2021-11-19 15:00:32,899 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 2 states have internal predecessors, (87), 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 15:00:32,899 INFO L276 IsEmpty]: Start isEmpty. Operand 2299 states and 4265 transitions. [2021-11-19 15:00:32,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-11-19 15:00:32,908 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:00:32,909 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, 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] [2021-11-19 15:00:32,949 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ffd25c-5d26-4631-b03e-8f1a8ac982a3/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-11-19 15:00:33,125 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ffd25c-5d26-4631-b03e-8f1a8ac982a3/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-11-19 15:00:33,126 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:00:33,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:00:33,127 INFO L85 PathProgramCache]: Analyzing trace with hash 770009192, now seen corresponding path program 1 times [2021-11-19 15:00:33,127 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 15:00:33,127 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217394490] [2021-11-19 15:00:33,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:00:33,128 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 15:00:33,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:00:33,327 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 15:00:33,327 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 15:00:33,327 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217394490] [2021-11-19 15:00:33,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217394490] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 15:00:33,328 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703506135] [2021-11-19 15:00:33,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:00:33,329 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 15:00:33,329 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ffd25c-5d26-4631-b03e-8f1a8ac982a3/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 15:00:33,330 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ffd25c-5d26-4631-b03e-8f1a8ac982a3/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 15:00:33,353 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ffd25c-5d26-4631-b03e-8f1a8ac982a3/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-19 15:00:33,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:00:33,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 972 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 15:00:33,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:00:33,864 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-19 15:00:33,865 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:00:34,175 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-19 15:00:34,175 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1703506135] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 15:00:34,175 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-19 15:00:34,176 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5, 4] total 7 [2021-11-19 15:00:34,176 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036013358] [2021-11-19 15:00:34,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 15:00:34,177 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 15:00:34,177 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 15:00:34,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 15:00:34,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-19 15:00:34,178 INFO L87 Difference]: Start difference. First operand 2299 states and 4265 transitions. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 2 states have internal predecessors, (81), 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 15:00:34,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:00:34,805 INFO L93 Difference]: Finished difference Result 3592 states and 6276 transitions. [2021-11-19 15:00:34,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 15:00:34,806 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 2 states have internal predecessors, (81), 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 129 [2021-11-19 15:00:34,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:00:34,831 INFO L225 Difference]: With dead ends: 3592 [2021-11-19 15:00:34,831 INFO L226 Difference]: Without dead ends: 2939 [2021-11-19 15:00:34,837 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 255 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 15:00:34,838 INFO L933 BasicCegarLoop]: 3325 mSDtfsCounter, 3507 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 310 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3507 SdHoareTripleChecker+Valid, 3535 SdHoareTripleChecker+Invalid, 312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-19 15:00:34,839 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3507 Valid, 3535 Invalid, 312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 310 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-19 15:00:34,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2939 states. [2021-11-19 15:00:34,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2939 to 2933. [2021-11-19 15:00:34,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2933 states, 2719 states have (on average 1.7988230967267378) internal successors, (4891), 2725 states have internal predecessors, (4891), 164 states have call successors, (164), 48 states have call predecessors, (164), 48 states have return successors, (164), 160 states have call predecessors, (164), 164 states have call successors, (164) [2021-11-19 15:00:34,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2933 states to 2933 states and 5219 transitions. [2021-11-19 15:00:34,994 INFO L78 Accepts]: Start accepts. Automaton has 2933 states and 5219 transitions. Word has length 129 [2021-11-19 15:00:34,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:00:34,995 INFO L470 AbstractCegarLoop]: Abstraction has 2933 states and 5219 transitions. [2021-11-19 15:00:34,995 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 2 states have internal predecessors, (81), 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 15:00:34,995 INFO L276 IsEmpty]: Start isEmpty. Operand 2933 states and 5219 transitions. [2021-11-19 15:00:35,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-11-19 15:00:35,002 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:00:35,002 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, 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] [2021-11-19 15:00:35,049 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ffd25c-5d26-4631-b03e-8f1a8ac982a3/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-19 15:00:35,217 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ffd25c-5d26-4631-b03e-8f1a8ac982a3/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 15:00:35,217 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:00:35,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:00:35,218 INFO L85 PathProgramCache]: Analyzing trace with hash -1302726998, now seen corresponding path program 1 times [2021-11-19 15:00:35,218 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 15:00:35,218 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010112115] [2021-11-19 15:00:35,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:00:35,219 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 15:00:35,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:00:35,365 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 15:00:35,365 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 15:00:35,366 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010112115] [2021-11-19 15:00:35,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010112115] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 15:00:35,373 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788020041] [2021-11-19 15:00:35,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:00:35,373 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 15:00:35,374 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ffd25c-5d26-4631-b03e-8f1a8ac982a3/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 15:00:35,375 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ffd25c-5d26-4631-b03e-8f1a8ac982a3/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 15:00:35,397 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ffd25c-5d26-4631-b03e-8f1a8ac982a3/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-19 15:00:35,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:00:35,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 966 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 15:00:35,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:00:35,966 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-19 15:00:35,967 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:00:36,325 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-19 15:00:36,325 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1788020041] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 15:00:36,326 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-19 15:00:36,326 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5, 4] total 7 [2021-11-19 15:00:36,326 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620032030] [2021-11-19 15:00:36,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 15:00:36,327 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 15:00:36,328 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 15:00:36,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 15:00:36,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-19 15:00:36,329 INFO L87 Difference]: Start difference. First operand 2933 states and 5219 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 2 states have internal predecessors, (78), 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 15:00:37,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:00:37,016 INFO L93 Difference]: Finished difference Result 5482 states and 9168 transitions. [2021-11-19 15:00:37,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 15:00:37,017 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 2 states have internal predecessors, (78), 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 129 [2021-11-19 15:00:37,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:00:37,056 INFO L225 Difference]: With dead ends: 5482 [2021-11-19 15:00:37,056 INFO L226 Difference]: Without dead ends: 4195 [2021-11-19 15:00:37,066 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 255 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 15:00:37,069 INFO L933 BasicCegarLoop]: 3294 mSDtfsCounter, 3510 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3510 SdHoareTripleChecker+Valid, 3504 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-19 15:00:37,070 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3510 Valid, 3504 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-19 15:00:37,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4195 states. [2021-11-19 15:00:37,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4195 to 4185. [2021-11-19 15:00:37,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4185 states, 3771 states have (on average 1.7138690002651817) internal successors, (6463), 3781 states have internal predecessors, (6463), 316 states have call successors, (316), 96 states have call predecessors, (316), 96 states have return successors, (316), 308 states have call predecessors, (316), 316 states have call successors, (316) [2021-11-19 15:00:37,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4185 states to 4185 states and 7095 transitions. [2021-11-19 15:00:37,305 INFO L78 Accepts]: Start accepts. Automaton has 4185 states and 7095 transitions. Word has length 129 [2021-11-19 15:00:37,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:00:37,306 INFO L470 AbstractCegarLoop]: Abstraction has 4185 states and 7095 transitions. [2021-11-19 15:00:37,306 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 2 states have internal predecessors, (78), 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 15:00:37,307 INFO L276 IsEmpty]: Start isEmpty. Operand 4185 states and 7095 transitions. [2021-11-19 15:00:37,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-11-19 15:00:37,317 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:00:37,317 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, 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] [2021-11-19 15:00:37,359 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ffd25c-5d26-4631-b03e-8f1a8ac982a3/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-19 15:00:37,533 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ffd25c-5d26-4631-b03e-8f1a8ac982a3/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 15:00:37,533 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:00:37,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:00:37,534 INFO L85 PathProgramCache]: Analyzing trace with hash -1441748696, now seen corresponding path program 1 times [2021-11-19 15:00:37,534 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 15:00:37,534 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616600101] [2021-11-19 15:00:37,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:00:37,535 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 15:00:37,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:00:37,680 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 15:00:37,680 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 15:00:37,681 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616600101] [2021-11-19 15:00:37,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616600101] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 15:00:37,681 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343551375] [2021-11-19 15:00:37,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:00:37,681 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 15:00:37,682 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ffd25c-5d26-4631-b03e-8f1a8ac982a3/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 15:00:37,683 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ffd25c-5d26-4631-b03e-8f1a8ac982a3/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 15:00:37,709 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ffd25c-5d26-4631-b03e-8f1a8ac982a3/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-19 15:00:37,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:00:37,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 960 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 15:00:37,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:00:38,218 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-19 15:00:38,218 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:00:38,473 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-19 15:00:38,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [343551375] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 15:00:38,473 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-19 15:00:38,474 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5, 4] total 7 [2021-11-19 15:00:38,474 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808291234] [2021-11-19 15:00:38,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 15:00:38,475 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 15:00:38,475 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 15:00:38,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 15:00:38,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-19 15:00:38,476 INFO L87 Difference]: Start difference. First operand 4185 states and 7095 transitions. Second operand has 3 states, 3 states have (on average 33.0) internal successors, (99), 2 states have internal predecessors, (99), 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 15:00:39,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:00:39,382 INFO L93 Difference]: Finished difference Result 9214 states and 14852 transitions. [2021-11-19 15:00:39,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 15:00:39,383 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 2 states have internal predecessors, (99), 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 129 [2021-11-19 15:00:39,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:00:39,446 INFO L225 Difference]: With dead ends: 9214 [2021-11-19 15:00:39,446 INFO L226 Difference]: Without dead ends: 6675 [2021-11-19 15:00:39,461 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 255 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 15:00:39,464 INFO L933 BasicCegarLoop]: 3294 mSDtfsCounter, 3489 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3489 SdHoareTripleChecker+Valid, 3504 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-19 15:00:39,467 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3489 Valid, 3504 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-19 15:00:39,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6675 states. [2021-11-19 15:00:39,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6675 to 6657. [2021-11-19 15:00:39,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6657 states, 5851 states have (on average 1.6337378225944283) internal successors, (9559), 5869 states have internal predecessors, (9559), 612 states have call successors, (612), 192 states have call predecessors, (612), 192 states have return successors, (612), 596 states have call predecessors, (612), 612 states have call successors, (612) [2021-11-19 15:00:39,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6657 states to 6657 states and 10783 transitions. [2021-11-19 15:00:39,892 INFO L78 Accepts]: Start accepts. Automaton has 6657 states and 10783 transitions. Word has length 129 [2021-11-19 15:00:39,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:00:39,893 INFO L470 AbstractCegarLoop]: Abstraction has 6657 states and 10783 transitions. [2021-11-19 15:00:39,893 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 2 states have internal predecessors, (99), 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 15:00:39,894 INFO L276 IsEmpty]: Start isEmpty. Operand 6657 states and 10783 transitions. [2021-11-19 15:00:39,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-11-19 15:00:39,911 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:00:39,911 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, 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] [2021-11-19 15:00:39,958 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ffd25c-5d26-4631-b03e-8f1a8ac982a3/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-19 15:00:40,137 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ffd25c-5d26-4631-b03e-8f1a8ac982a3/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 15:00:40,137 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:00:40,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:00:40,138 INFO L85 PathProgramCache]: Analyzing trace with hash -1477336086, now seen corresponding path program 1 times [2021-11-19 15:00:40,138 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 15:00:40,138 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135486611] [2021-11-19 15:00:40,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:00:40,139 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 15:00:40,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:00:40,241 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 15:00:40,242 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 15:00:40,242 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135486611] [2021-11-19 15:00:40,242 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135486611] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 15:00:40,242 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056757865] [2021-11-19 15:00:40,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:00:40,243 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 15:00:40,243 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ffd25c-5d26-4631-b03e-8f1a8ac982a3/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 15:00:40,246 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ffd25c-5d26-4631-b03e-8f1a8ac982a3/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 15:00:40,269 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ffd25c-5d26-4631-b03e-8f1a8ac982a3/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-19 15:00:40,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:00:40,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 954 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 15:00:40,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:00:40,862 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 15:00:40,863 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:00:41,190 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-11-19 15:00:41,190 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1056757865] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 15:00:41,190 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-19 15:00:41,191 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5, 4] total 7 [2021-11-19 15:00:41,191 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424150915] [2021-11-19 15:00:41,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 15:00:41,192 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 15:00:41,192 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 15:00:41,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 15:00:41,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-19 15:00:41,193 INFO L87 Difference]: Start difference. First operand 6657 states and 10783 transitions. Second operand has 3 states, 3 states have (on average 35.0) internal successors, (105), 2 states have internal predecessors, (105), 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 15:00:42,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:00:42,203 INFO L93 Difference]: Finished difference Result 16582 states and 26020 transitions. [2021-11-19 15:00:42,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 15:00:42,204 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 2 states have internal predecessors, (105), 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 129 [2021-11-19 15:00:42,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:00:42,321 INFO L225 Difference]: With dead ends: 16582 [2021-11-19 15:00:42,323 INFO L226 Difference]: Without dead ends: 11571 [2021-11-19 15:00:42,353 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 255 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 15:00:42,354 INFO L933 BasicCegarLoop]: 3294 mSDtfsCounter, 3483 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3483 SdHoareTripleChecker+Valid, 3504 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-19 15:00:42,355 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3483 Valid, 3504 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-19 15:00:42,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11571 states. [2021-11-19 15:00:43,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11571 to 11537. [2021-11-19 15:00:43,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11537 states, 9963 states have (on average 1.571313861286761) internal successors, (15655), 9997 states have internal predecessors, (15655), 1188 states have call successors, (1188), 384 states have call predecessors, (1188), 384 states have return successors, (1188), 1156 states have call predecessors, (1188), 1188 states have call successors, (1188) [2021-11-19 15:00:43,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11537 states to 11537 states and 18031 transitions. [2021-11-19 15:00:43,375 INFO L78 Accepts]: Start accepts. Automaton has 11537 states and 18031 transitions. Word has length 129 [2021-11-19 15:00:43,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:00:43,377 INFO L470 AbstractCegarLoop]: Abstraction has 11537 states and 18031 transitions. [2021-11-19 15:00:43,378 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 2 states have internal predecessors, (105), 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 15:00:43,378 INFO L276 IsEmpty]: Start isEmpty. Operand 11537 states and 18031 transitions. [2021-11-19 15:00:43,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-11-19 15:00:43,407 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:00:43,407 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, 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] [2021-11-19 15:00:43,454 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ffd25c-5d26-4631-b03e-8f1a8ac982a3/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-19 15:00:43,629 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ffd25c-5d26-4631-b03e-8f1a8ac982a3/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 15:00:43,630 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:00:43,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:00:43,630 INFO L85 PathProgramCache]: Analyzing trace with hash -171026388, now seen corresponding path program 1 times [2021-11-19 15:00:43,630 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 15:00:43,630 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117809173] [2021-11-19 15:00:43,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:00:43,631 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 15:00:43,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:00:43,803 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 15:00:43,804 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 15:00:43,804 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117809173] [2021-11-19 15:00:43,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117809173] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 15:00:43,804 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [717741599] [2021-11-19 15:00:43,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:00:43,805 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 15:00:43,805 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ffd25c-5d26-4631-b03e-8f1a8ac982a3/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 15:00:43,810 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ffd25c-5d26-4631-b03e-8f1a8ac982a3/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 15:00:43,827 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ffd25c-5d26-4631-b03e-8f1a8ac982a3/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-19 15:00:44,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:00:44,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 948 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 15:00:44,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:00:44,334 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-19 15:00:44,335 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:00:44,605 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-19 15:00:44,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [717741599] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 15:00:44,605 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-19 15:00:44,605 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5, 4] total 7 [2021-11-19 15:00:44,606 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089530817] [2021-11-19 15:00:44,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 15:00:44,607 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 15:00:44,607 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 15:00:44,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 15:00:44,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-19 15:00:44,608 INFO L87 Difference]: Start difference. First operand 11537 states and 18031 transitions. Second operand has 3 states, 3 states have (on average 31.0) internal successors, (93), 2 states have internal predecessors, (93), 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 15:00:45,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:00:45,891 INFO L93 Difference]: Finished difference Result 31126 states and 47956 transitions. [2021-11-19 15:00:45,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 15:00:45,891 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 2 states have internal predecessors, (93), 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 129 [2021-11-19 15:00:45,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:00:46,004 INFO L225 Difference]: With dead ends: 31126 [2021-11-19 15:00:46,004 INFO L226 Difference]: Without dead ends: 21235 [2021-11-19 15:00:46,057 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 255 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 15:00:46,058 INFO L933 BasicCegarLoop]: 3294 mSDtfsCounter, 3495 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3495 SdHoareTripleChecker+Valid, 3504 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-19 15:00:46,059 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3495 Valid, 3504 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-19 15:00:46,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21235 states. [2021-11-19 15:00:47,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21235 to 21169. [2021-11-19 15:00:47,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21169 states, 18091 states have (on average 1.5286606599966834) internal successors, (27655), 18157 states have internal predecessors, (27655), 2308 states have call successors, (2308), 768 states have call predecessors, (2308), 768 states have return successors, (2308), 2244 states have call predecessors, (2308), 2308 states have call successors, (2308) [2021-11-19 15:00:47,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21169 states to 21169 states and 32271 transitions. [2021-11-19 15:00:47,400 INFO L78 Accepts]: Start accepts. Automaton has 21169 states and 32271 transitions. Word has length 129 [2021-11-19 15:00:47,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:00:47,401 INFO L470 AbstractCegarLoop]: Abstraction has 21169 states and 32271 transitions. [2021-11-19 15:00:47,401 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 2 states have internal predecessors, (93), 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 15:00:47,401 INFO L276 IsEmpty]: Start isEmpty. Operand 21169 states and 32271 transitions. [2021-11-19 15:00:47,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-11-19 15:00:47,455 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:00:47,458 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, 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] [2021-11-19 15:00:47,504 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ffd25c-5d26-4631-b03e-8f1a8ac982a3/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-19 15:00:47,673 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19ffd25c-5d26-4631-b03e-8f1a8ac982a3/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-19 15:00:47,673 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:00:47,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:00:47,674 INFO L85 PathProgramCache]: Analyzing trace with hash -133908114, now seen corresponding path program 1 times [2021-11-19 15:00:47,674 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 15:00:47,674 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750185940] [2021-11-19 15:00:47,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:00:47,675 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 15:00:47,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:00:47,869 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-19 15:00:47,869 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 15:00:47,869 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750185940] [2021-11-19 15:00:47,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750185940] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 15:00:47,870 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:00:47,870 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-19 15:00:47,870 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976742001] [2021-11-19 15:00:47,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 15:00:47,871 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 15:00:47,871 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 15:00:47,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 15:00:47,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-19 15:00:47,873 INFO L87 Difference]: Start difference. First operand 21169 states and 32271 transitions. Second operand has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-19 15:00:50,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:00:50,780 INFO L93 Difference]: Finished difference Result 66869 states and 100498 transitions. [2021-11-19 15:00:50,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 15:00:50,781 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 129 [2021-11-19 15:00:50,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:00:51,274 INFO L225 Difference]: With dead ends: 66869 [2021-11-19 15:00:51,275 INFO L226 Difference]: Without dead ends: 47347 [2021-11-19 15:00:51,344 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-11-19 15:00:51,345 INFO L933 BasicCegarLoop]: 3306 mSDtfsCounter, 4189 mSDsluCounter, 7037 mSDsCounter, 0 mSdLazyCounter, 916 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4209 SdHoareTripleChecker+Valid, 9835 SdHoareTripleChecker+Invalid, 1056 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 916 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-19 15:00:51,346 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4209 Valid, 9835 Invalid, 1056 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 916 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-19 15:00:51,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47347 states. [2021-11-19 15:00:53,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47347 to 39921. [2021-11-19 15:00:53,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39921 states, 33899 states have (on average 1.5011357267176022) internal successors, (50887), 34029 states have internal predecessors, (50887), 4484 states have call successors, (4484), 1536 states have call predecessors, (4484), 1536 states have return successors, (4484), 4356 states have call predecessors, (4484), 4484 states have call successors, (4484) [2021-11-19 15:00:53,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39921 states to 39921 states and 59855 transitions. [2021-11-19 15:00:53,974 INFO L78 Accepts]: Start accepts. Automaton has 39921 states and 59855 transitions. Word has length 129 [2021-11-19 15:00:53,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:00:53,976 INFO L470 AbstractCegarLoop]: Abstraction has 39921 states and 59855 transitions. [2021-11-19 15:00:53,976 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-19 15:00:53,976 INFO L276 IsEmpty]: Start isEmpty. Operand 39921 states and 59855 transitions. [2021-11-19 15:00:54,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-11-19 15:00:54,068 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:00:54,068 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, 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] [2021-11-19 15:00:54,068 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-19 15:00:54,068 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:00:54,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:00:54,069 INFO L85 PathProgramCache]: Analyzing trace with hash 812135549, now seen corresponding path program 1 times [2021-11-19 15:00:54,069 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 15:00:54,070 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507717230] [2021-11-19 15:00:54,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:00:54,070 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 15:00:54,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:00:54,467 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-19 15:00:54,467 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 15:00:54,467 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507717230] [2021-11-19 15:00:54,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507717230] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 15:00:54,467 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:00:54,468 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-19 15:00:54,468 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769488492] [2021-11-19 15:00:54,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 15:00:54,469 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 15:00:54,469 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 15:00:54,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 15:00:54,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-19 15:00:54,470 INFO L87 Difference]: Start difference. First operand 39921 states and 59855 transitions. Second operand has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-19 15:00:58,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:00:58,797 INFO L93 Difference]: Finished difference Result 125941 states and 187986 transitions. [2021-11-19 15:00:58,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 15:00:58,800 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 130 [2021-11-19 15:00:58,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:00:59,461 INFO L225 Difference]: With dead ends: 125941 [2021-11-19 15:00:59,461 INFO L226 Difference]: Without dead ends: 87667 [2021-11-19 15:00:59,575 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-11-19 15:00:59,578 INFO L933 BasicCegarLoop]: 3276 mSDtfsCounter, 4153 mSDsluCounter, 6998 mSDsCounter, 0 mSdLazyCounter, 902 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4173 SdHoareTripleChecker+Valid, 9771 SdHoareTripleChecker+Invalid, 1054 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 902 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-19 15:00:59,578 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4173 Valid, 9771 Invalid, 1054 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 902 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-19 15:00:59,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87667 states. [2021-11-19 15:01:03,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87667 to 76657. [2021-11-19 15:01:03,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76657 states, 64875 states have (on average 1.4828362235067438) internal successors, (96199), 65133 states have internal predecessors, (96199), 8708 states have call successors, (8708), 3072 states have call predecessors, (8708), 3072 states have return successors, (8708), 8452 states have call predecessors, (8708), 8708 states have call successors, (8708) [2021-11-19 15:01:04,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76657 states to 76657 states and 113615 transitions. [2021-11-19 15:01:04,190 INFO L78 Accepts]: Start accepts. Automaton has 76657 states and 113615 transitions. Word has length 130 [2021-11-19 15:01:04,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:01:04,191 INFO L470 AbstractCegarLoop]: Abstraction has 76657 states and 113615 transitions. [2021-11-19 15:01:04,192 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-19 15:01:04,192 INFO L276 IsEmpty]: Start isEmpty. Operand 76657 states and 113615 transitions. [2021-11-19 15:01:04,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-11-19 15:01:04,341 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:01:04,342 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, 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 15:01:04,342 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-19 15:01:04,342 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:01:04,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:01:04,343 INFO L85 PathProgramCache]: Analyzing trace with hash -2087773234, now seen corresponding path program 1 times [2021-11-19 15:01:04,343 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 15:01:04,343 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224280186] [2021-11-19 15:01:04,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:01:04,344 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 15:01:04,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:01:04,531 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-19 15:01:04,531 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 15:01:04,532 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224280186] [2021-11-19 15:01:04,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224280186] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 15:01:04,532 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:01:04,532 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-19 15:01:04,535 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594391814] [2021-11-19 15:01:04,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 15:01:04,536 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 15:01:04,536 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 15:01:04,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 15:01:04,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-19 15:01:04,537 INFO L87 Difference]: Start difference. First operand 76657 states and 113615 transitions. Second operand has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-19 15:01:13,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:01:13,132 INFO L93 Difference]: Finished difference Result 264565 states and 390098 transitions. [2021-11-19 15:01:13,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 15:01:13,132 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 131 [2021-11-19 15:01:13,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:01:14,493 INFO L225 Difference]: With dead ends: 264565 [2021-11-19 15:01:14,503 INFO L226 Difference]: Without dead ends: 189555 [2021-11-19 15:01:14,860 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-11-19 15:01:14,860 INFO L933 BasicCegarLoop]: 3296 mSDtfsCounter, 4307 mSDsluCounter, 7045 mSDsCounter, 0 mSdLazyCounter, 919 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4327 SdHoareTripleChecker+Valid, 9830 SdHoareTripleChecker+Invalid, 1059 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 919 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-19 15:01:14,861 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4327 Valid, 9830 Invalid, 1059 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 919 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-19 15:01:15,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189555 states. [2021-11-19 15:01:22,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189555 to 148593. [2021-11-19 15:01:22,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148593 states, 125547 states have (on average 1.4697205030785283) internal successors, (184519), 126061 states have internal predecessors, (184519), 16900 states have call successors, (16900), 6144 states have call predecessors, (16900), 6144 states have return successors, (16900), 16388 states have call predecessors, (16900), 16900 states have call successors, (16900) [2021-11-19 15:01:23,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148593 states to 148593 states and 218319 transitions. [2021-11-19 15:01:23,618 INFO L78 Accepts]: Start accepts. Automaton has 148593 states and 218319 transitions. Word has length 131 [2021-11-19 15:01:23,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:01:23,619 INFO L470 AbstractCegarLoop]: Abstraction has 148593 states and 218319 transitions. [2021-11-19 15:01:23,620 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-19 15:01:23,620 INFO L276 IsEmpty]: Start isEmpty. Operand 148593 states and 218319 transitions. [2021-11-19 15:01:23,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-11-19 15:01:23,896 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:01:23,897 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, 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] [2021-11-19 15:01:23,897 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-19 15:01:23,897 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:01:23,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:01:23,898 INFO L85 PathProgramCache]: Analyzing trace with hash -1060533863, now seen corresponding path program 1 times [2021-11-19 15:01:23,898 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 15:01:23,898 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796845787] [2021-11-19 15:01:23,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:01:23,899 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 15:01:23,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:01:24,077 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-19 15:01:24,078 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 15:01:24,078 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796845787] [2021-11-19 15:01:24,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796845787] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 15:01:24,078 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:01:24,078 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-19 15:01:24,079 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689070740] [2021-11-19 15:01:24,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 15:01:24,080 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 15:01:24,080 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 15:01:24,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 15:01:24,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-19 15:01:24,081 INFO L87 Difference]: Start difference. First operand 148593 states and 218319 transitions. Second operand has 6 states, 6 states have (on average 13.0) internal successors, (78), 6 states have internal predecessors, (78), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8)