./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/Problem05_label48+token_ring.06.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8e183-df0a-4158-a466-8c6ee6125d25/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8e183-df0a-4158-a466-8c6ee6125d25/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8e183-df0a-4158-a466-8c6ee6125d25/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8e183-df0a-4158-a466-8c6ee6125d25/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/Problem05_label48+token_ring.06.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8e183-df0a-4158-a466-8c6ee6125d25/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8e183-df0a-4158-a466-8c6ee6125d25/bin/utaipan-eEHZpOm5b7 --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 f9cd80dbbe1b4066ac5bff4e37171791ef74a282de4eb4995f2a9b4ca41823fa --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 20:17:03,782 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 20:17:03,784 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 20:17:03,849 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 20:17:03,852 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 20:17:03,858 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 20:17:03,861 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 20:17:03,865 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 20:17:03,867 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 20:17:03,869 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 20:17:03,870 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 20:17:03,871 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 20:17:03,872 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 20:17:03,874 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 20:17:03,875 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 20:17:03,877 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 20:17:03,878 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 20:17:03,879 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 20:17:03,881 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 20:17:03,884 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 20:17:03,886 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 20:17:03,887 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 20:17:03,889 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 20:17:03,890 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 20:17:03,894 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 20:17:03,894 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 20:17:03,895 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 20:17:03,896 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 20:17:03,897 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 20:17:03,898 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 20:17:03,899 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 20:17:03,900 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 20:17:03,901 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 20:17:03,902 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 20:17:03,903 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 20:17:03,904 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 20:17:03,905 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 20:17:03,905 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 20:17:03,905 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 20:17:03,907 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 20:17:03,908 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 20:17:03,909 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8e183-df0a-4158-a466-8c6ee6125d25/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-25 20:17:03,936 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 20:17:03,937 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 20:17:03,937 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 20:17:03,938 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 20:17:03,938 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 20:17:03,939 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 20:17:03,939 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 20:17:03,939 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 20:17:03,940 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 20:17:03,940 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 20:17:03,940 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 20:17:03,940 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 20:17:03,941 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 20:17:03,941 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 20:17:03,941 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 20:17:03,942 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 20:17:03,942 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 20:17:03,942 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 20:17:03,943 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 20:17:03,943 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 20:17:03,943 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 20:17:03,944 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 20:17:03,944 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 20:17:03,944 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 20:17:03,944 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 20:17:03,945 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 20:17:03,945 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 20:17:03,945 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 20:17:03,945 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 20:17:03,946 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 20:17:03,946 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 20:17:03,946 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 20:17:03,946 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 20:17:03,947 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 20:17:03,947 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 20:17:03,947 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 20:17:03,947 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 20:17:03,948 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 20:17:03,948 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 20:17:03,948 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 20:17:03,948 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 20:17:03,949 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_01f8e183-df0a-4158-a466-8c6ee6125d25/bin/utaipan-eEHZpOm5b7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8e183-df0a-4158-a466-8c6ee6125d25/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f9cd80dbbe1b4066ac5bff4e37171791ef74a282de4eb4995f2a9b4ca41823fa [2021-11-25 20:17:04,220 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 20:17:04,242 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 20:17:04,245 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 20:17:04,246 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 20:17:04,247 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 20:17:04,249 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8e183-df0a-4158-a466-8c6ee6125d25/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/combinations/Problem05_label48+token_ring.06.cil-2.c [2021-11-25 20:17:04,307 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8e183-df0a-4158-a466-8c6ee6125d25/bin/utaipan-eEHZpOm5b7/data/3821c3b3a/3dac22558964448d9d26ead6cd60a1bb/FLAG1e90641f9 [2021-11-25 20:17:05,286 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 20:17:05,287 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8e183-df0a-4158-a466-8c6ee6125d25/sv-benchmarks/c/combinations/Problem05_label48+token_ring.06.cil-2.c [2021-11-25 20:17:05,356 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8e183-df0a-4158-a466-8c6ee6125d25/bin/utaipan-eEHZpOm5b7/data/3821c3b3a/3dac22558964448d9d26ead6cd60a1bb/FLAG1e90641f9 [2021-11-25 20:17:05,641 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8e183-df0a-4158-a466-8c6ee6125d25/bin/utaipan-eEHZpOm5b7/data/3821c3b3a/3dac22558964448d9d26ead6cd60a1bb [2021-11-25 20:17:05,644 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 20:17:05,648 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 20:17:05,650 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 20:17:05,650 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 20:17:05,654 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 20:17:05,655 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:17:05" (1/1) ... [2021-11-25 20:17:05,657 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1bdbf147 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:17:05, skipping insertion in model container [2021-11-25 20:17:05,657 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:17:05" (1/1) ... [2021-11-25 20:17:05,667 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 20:17:05,972 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 20:17:08,440 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_01f8e183-df0a-4158-a466-8c6ee6125d25/sv-benchmarks/c/combinations/Problem05_label48+token_ring.06.cil-2.c[375709,375722] [2021-11-25 20:17:08,523 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_01f8e183-df0a-4158-a466-8c6ee6125d25/sv-benchmarks/c/combinations/Problem05_label48+token_ring.06.cil-2.c[383339,383352] [2021-11-25 20:17:08,811 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 20:17:08,821 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 20:17:10,099 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_01f8e183-df0a-4158-a466-8c6ee6125d25/sv-benchmarks/c/combinations/Problem05_label48+token_ring.06.cil-2.c[375709,375722] [2021-11-25 20:17:10,112 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_01f8e183-df0a-4158-a466-8c6ee6125d25/sv-benchmarks/c/combinations/Problem05_label48+token_ring.06.cil-2.c[383339,383352] [2021-11-25 20:17:10,140 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 20:17:10,218 INFO L208 MainTranslator]: Completed translation [2021-11-25 20:17:10,218 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:17:10 WrapperNode [2021-11-25 20:17:10,219 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 20:17:10,220 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 20:17:10,220 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 20:17:10,220 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 20:17:10,228 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:17:10" (1/1) ... [2021-11-25 20:17:10,331 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:17:10" (1/1) ... [2021-11-25 20:17:10,817 INFO L137 Inliner]: procedures = 56, calls = 59, calls flagged for inlining = 34, calls inlined = 34, statements flattened = 12851 [2021-11-25 20:17:10,818 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 20:17:10,819 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 20:17:10,819 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 20:17:10,819 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 20:17:10,829 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:17:10" (1/1) ... [2021-11-25 20:17:10,829 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:17:10" (1/1) ... [2021-11-25 20:17:10,894 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:17:10" (1/1) ... [2021-11-25 20:17:10,894 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:17:10" (1/1) ... [2021-11-25 20:17:11,173 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:17:10" (1/1) ... [2021-11-25 20:17:11,280 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:17:10" (1/1) ... [2021-11-25 20:17:11,353 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:17:10" (1/1) ... [2021-11-25 20:17:11,440 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 20:17:11,441 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 20:17:11,441 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 20:17:11,441 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 20:17:11,442 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:17:10" (1/1) ... [2021-11-25 20:17:11,450 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 20:17:11,461 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8e183-df0a-4158-a466-8c6ee6125d25/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:17:11,479 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8e183-df0a-4158-a466-8c6ee6125d25/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 20:17:11,481 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8e183-df0a-4158-a466-8c6ee6125d25/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 20:17:11,520 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 20:17:11,520 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2021-11-25 20:17:11,520 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2021-11-25 20:17:11,521 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-11-25 20:17:11,521 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-11-25 20:17:11,521 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2021-11-25 20:17:11,521 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2021-11-25 20:17:11,521 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2021-11-25 20:17:11,522 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2021-11-25 20:17:11,522 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2021-11-25 20:17:11,522 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2021-11-25 20:17:11,522 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2021-11-25 20:17:11,522 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2021-11-25 20:17:11,522 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 20:17:11,523 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 20:17:11,523 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 20:17:11,647 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 20:17:11,658 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 20:17:18,960 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 20:17:21,319 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 20:17:21,319 INFO L301 CfgBuilder]: Removed 10 assume(true) statements. [2021-11-25 20:17:21,326 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:17:21 BoogieIcfgContainer [2021-11-25 20:17:21,327 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 20:17:21,331 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 20:17:21,331 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 20:17:21,335 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 20:17:21,335 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 08:17:05" (1/3) ... [2021-11-25 20:17:21,336 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b3becc8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:17:21, skipping insertion in model container [2021-11-25 20:17:21,336 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:17:10" (2/3) ... [2021-11-25 20:17:21,337 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b3becc8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:17:21, skipping insertion in model container [2021-11-25 20:17:21,337 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:17:21" (3/3) ... [2021-11-25 20:17:21,339 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem05_label48+token_ring.06.cil-2.c [2021-11-25 20:17:21,348 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 20:17:21,348 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-25 20:17:21,419 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 20:17:21,428 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 [2021-11-25 20:17:21,428 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-25 20:17:21,490 INFO L276 IsEmpty]: Start isEmpty. Operand has 1765 states, 1736 states have (on average 1.9683179723502304) internal successors, (3417), 1739 states have internal predecessors, (3417), 20 states have call successors, (20), 6 states have call predecessors, (20), 6 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2021-11-25 20:17:21,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-25 20:17:21,503 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:17:21,504 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] [2021-11-25 20:17:21,504 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:17:21,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:17:21,511 INFO L85 PathProgramCache]: Analyzing trace with hash -425683428, now seen corresponding path program 1 times [2021-11-25 20:17:21,521 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:17:21,522 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746617745] [2021-11-25 20:17:21,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:17:21,524 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:17:21,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:17:21,927 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:17:21,927 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:17:21,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746617745] [2021-11-25 20:17:21,928 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746617745] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:17:21,929 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:17:21,929 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 20:17:21,931 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729863054] [2021-11-25 20:17:21,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:17:21,936 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 20:17:21,936 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:17:21,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 20:17:21,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 20:17:21,986 INFO L87 Difference]: Start difference. First operand has 1765 states, 1736 states have (on average 1.9683179723502304) internal successors, (3417), 1739 states have internal predecessors, (3417), 20 states have call successors, (20), 6 states have call predecessors, (20), 6 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (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) [2021-11-25 20:17:22,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:17:22,964 INFO L93 Difference]: Finished difference Result 3635 states and 7091 transitions. [2021-11-25 20:17:22,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 20:17:22,967 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (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 49 [2021-11-25 20:17:22,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:17:22,999 INFO L225 Difference]: With dead ends: 3635 [2021-11-25 20:17:23,000 INFO L226 Difference]: Without dead ends: 1869 [2021-11-25 20:17:23,011 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 [2021-11-25 20:17:23,018 INFO L933 BasicCegarLoop]: 3331 mSDtfsCounter, 3581 mSDsluCounter, 3529 mSDsCounter, 0 mSdLazyCounter, 630 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3581 SdHoareTripleChecker+Valid, 6588 SdHoareTripleChecker+Invalid, 644 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 630 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-25 20:17:23,019 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3581 Valid, 6588 Invalid, 644 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 630 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-25 20:17:23,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1869 states. [2021-11-25 20:17:23,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1869 to 1868. [2021-11-25 20:17:23,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1868 states, 1818 states have (on average 1.9405940594059405) internal successors, (3528), 1821 states have internal predecessors, (3528), 36 states have call successors, (36), 12 states have call predecessors, (36), 12 states have return successors, (36), 35 states have call predecessors, (36), 36 states have call successors, (36) [2021-11-25 20:17:23,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1868 states to 1868 states and 3600 transitions. [2021-11-25 20:17:23,217 INFO L78 Accepts]: Start accepts. Automaton has 1868 states and 3600 transitions. Word has length 49 [2021-11-25 20:17:23,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:17:23,218 INFO L470 AbstractCegarLoop]: Abstraction has 1868 states and 3600 transitions. [2021-11-25 20:17:23,218 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (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) [2021-11-25 20:17:23,219 INFO L276 IsEmpty]: Start isEmpty. Operand 1868 states and 3600 transitions. [2021-11-25 20:17:23,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-11-25 20:17:23,238 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:17:23,238 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:17:23,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 20:17:23,240 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:17:23,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:17:23,242 INFO L85 PathProgramCache]: Analyzing trace with hash -779394507, now seen corresponding path program 1 times [2021-11-25 20:17:23,242 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:17:23,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387164222] [2021-11-25 20:17:23,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:17:23,243 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:17:23,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:17:23,466 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-25 20:17:23,467 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:17:23,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387164222] [2021-11-25 20:17:23,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387164222] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:17:23,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583225200] [2021-11-25 20:17:23,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:17:23,469 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:17:23,469 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8e183-df0a-4158-a466-8c6ee6125d25/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:17:23,477 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8e183-df0a-4158-a466-8c6ee6125d25/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:17:23,505 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8e183-df0a-4158-a466-8c6ee6125d25/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-25 20:17:23,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:17:23,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 630 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-25 20:17:23,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:17:23,852 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-25 20:17:23,852 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:17:23,852 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1583225200] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:17:23,853 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 20:17:23,853 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2021-11-25 20:17:23,854 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104995317] [2021-11-25 20:17:23,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:17:23,855 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:17:23,855 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:17:23,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:17:23,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-25 20:17:23,856 INFO L87 Difference]: Start difference. First operand 1868 states and 3600 transitions. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 2 states have internal predecessors, (67), 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) [2021-11-25 20:17:24,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:17:24,401 INFO L93 Difference]: Finished difference Result 2305 states and 4255 transitions. [2021-11-25 20:17:24,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:17:24,402 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 2 states have internal predecessors, (67), 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 94 [2021-11-25 20:17:24,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:17:24,424 INFO L225 Difference]: With dead ends: 2305 [2021-11-25 20:17:24,424 INFO L226 Difference]: Without dead ends: 2083 [2021-11-25 20:17:24,427 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-25 20:17:24,429 INFO L933 BasicCegarLoop]: 3241 mSDtfsCounter, 3411 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3411 SdHoareTripleChecker+Valid, 3376 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 20:17:24,430 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3411 Valid, 3376 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 280 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-25 20:17:24,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2083 states. [2021-11-25 20:17:24,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2083 to 2079. [2021-11-25 20:17:24,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2079 states, 1987 states have (on average 1.898842476094615) internal successors, (3773), 1991 states have internal predecessors, (3773), 66 states have call successors, (66), 24 states have call predecessors, (66), 24 states have return successors, (66), 64 states have call predecessors, (66), 66 states have call successors, (66) [2021-11-25 20:17:24,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2079 states to 2079 states and 3905 transitions. [2021-11-25 20:17:24,540 INFO L78 Accepts]: Start accepts. Automaton has 2079 states and 3905 transitions. Word has length 94 [2021-11-25 20:17:24,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:17:24,541 INFO L470 AbstractCegarLoop]: Abstraction has 2079 states and 3905 transitions. [2021-11-25 20:17:24,541 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 2 states have internal predecessors, (67), 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) [2021-11-25 20:17:24,541 INFO L276 IsEmpty]: Start isEmpty. Operand 2079 states and 3905 transitions. [2021-11-25 20:17:24,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-11-25 20:17:24,546 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:17:24,546 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:17:24,585 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8e183-df0a-4158-a466-8c6ee6125d25/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-25 20:17:24,759 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8e183-df0a-4158-a466-8c6ee6125d25/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:17:24,759 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:17:24,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:17:24,760 INFO L85 PathProgramCache]: Analyzing trace with hash 86743829, now seen corresponding path program 1 times [2021-11-25 20:17:24,760 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:17:24,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843485840] [2021-11-25 20:17:24,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:17:24,761 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:17:24,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:17:24,920 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-25 20:17:24,920 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:17:24,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843485840] [2021-11-25 20:17:24,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843485840] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:17:24,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802378562] [2021-11-25 20:17:24,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:17:24,924 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:17:24,925 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8e183-df0a-4158-a466-8c6ee6125d25/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:17:24,930 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8e183-df0a-4158-a466-8c6ee6125d25/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:17:24,949 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8e183-df0a-4158-a466-8c6ee6125d25/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-25 20:17:25,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:17:25,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 624 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-25 20:17:25,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:17:25,283 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-25 20:17:25,283 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:17:25,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [802378562] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:17:25,284 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 20:17:25,284 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2021-11-25 20:17:25,285 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61085144] [2021-11-25 20:17:25,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:17:25,285 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:17:25,286 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:17:25,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:17:25,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-25 20:17:25,287 INFO L87 Difference]: Start difference. First operand 2079 states and 3905 transitions. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 2 states have internal predecessors, (61), 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) [2021-11-25 20:17:25,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:17:25,788 INFO L93 Difference]: Finished difference Result 2932 states and 5176 transitions. [2021-11-25 20:17:25,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:17:25,789 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 2 states have internal predecessors, (61), 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 94 [2021-11-25 20:17:25,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:17:25,811 INFO L225 Difference]: With dead ends: 2932 [2021-11-25 20:17:25,811 INFO L226 Difference]: Without dead ends: 2499 [2021-11-25 20:17:25,815 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-25 20:17:25,818 INFO L933 BasicCegarLoop]: 3240 mSDtfsCounter, 3417 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3417 SdHoareTripleChecker+Valid, 3375 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 20:17:25,820 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3417 Valid, 3375 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 280 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-25 20:17:25,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2499 states. [2021-11-25 20:17:25,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2499 to 2493. [2021-11-25 20:17:25,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2493 states, 2319 states have (on average 1.833117723156533) internal successors, (4251), 2325 states have internal predecessors, (4251), 124 states have call successors, (124), 48 states have call predecessors, (124), 48 states have return successors, (124), 120 states have call predecessors, (124), 124 states have call successors, (124) [2021-11-25 20:17:25,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2493 states to 2493 states and 4499 transitions. [2021-11-25 20:17:25,953 INFO L78 Accepts]: Start accepts. Automaton has 2493 states and 4499 transitions. Word has length 94 [2021-11-25 20:17:25,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:17:25,954 INFO L470 AbstractCegarLoop]: Abstraction has 2493 states and 4499 transitions. [2021-11-25 20:17:25,954 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 2 states have internal predecessors, (61), 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) [2021-11-25 20:17:25,955 INFO L276 IsEmpty]: Start isEmpty. Operand 2493 states and 4499 transitions. [2021-11-25 20:17:25,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-11-25 20:17:25,959 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:17:25,959 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:17:26,001 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8e183-df0a-4158-a466-8c6ee6125d25/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-25 20:17:26,185 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8e183-df0a-4158-a466-8c6ee6125d25/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:17:26,185 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:17:26,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:17:26,186 INFO L85 PathProgramCache]: Analyzing trace with hash -1489654795, now seen corresponding path program 1 times [2021-11-25 20:17:26,186 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:17:26,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114265033] [2021-11-25 20:17:26,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:17:26,187 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:17:26,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:17:26,260 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-25 20:17:26,261 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:17:26,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114265033] [2021-11-25 20:17:26,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114265033] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:17:26,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714502118] [2021-11-25 20:17:26,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:17:26,262 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:17:26,263 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8e183-df0a-4158-a466-8c6ee6125d25/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:17:26,264 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8e183-df0a-4158-a466-8c6ee6125d25/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:17:26,295 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8e183-df0a-4158-a466-8c6ee6125d25/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-25 20:17:26,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:17:26,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 618 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-25 20:17:26,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:17:26,643 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-25 20:17:26,644 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:17:26,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [714502118] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:17:26,644 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 20:17:26,645 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2021-11-25 20:17:26,645 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360768176] [2021-11-25 20:17:26,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:17:26,647 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:17:26,647 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:17:26,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:17:26,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-25 20:17:26,648 INFO L87 Difference]: Start difference. First operand 2493 states and 4499 transitions. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 2 states have internal predecessors, (58), 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) [2021-11-25 20:17:27,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:17:27,152 INFO L93 Difference]: Finished difference Result 4162 states and 6968 transitions. [2021-11-25 20:17:27,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:17:27,155 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 2 states have internal predecessors, (58), 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 94 [2021-11-25 20:17:27,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:17:27,185 INFO L225 Difference]: With dead ends: 4162 [2021-11-25 20:17:27,185 INFO L226 Difference]: Without dead ends: 3315 [2021-11-25 20:17:27,194 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-25 20:17:27,198 INFO L933 BasicCegarLoop]: 3214 mSDtfsCounter, 3420 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3420 SdHoareTripleChecker+Valid, 3349 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 20:17:27,199 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3420 Valid, 3349 Invalid, 279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-25 20:17:27,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3315 states. [2021-11-25 20:17:27,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3315 to 3305. [2021-11-25 20:17:27,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3305 states, 2971 states have (on average 1.7445304611242005) internal successors, (5183), 2981 states have internal predecessors, (5183), 236 states have call successors, (236), 96 states have call predecessors, (236), 96 states have return successors, (236), 228 states have call predecessors, (236), 236 states have call successors, (236) [2021-11-25 20:17:27,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3305 states to 3305 states and 5655 transitions. [2021-11-25 20:17:27,418 INFO L78 Accepts]: Start accepts. Automaton has 3305 states and 5655 transitions. Word has length 94 [2021-11-25 20:17:27,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:17:27,419 INFO L470 AbstractCegarLoop]: Abstraction has 3305 states and 5655 transitions. [2021-11-25 20:17:27,419 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 2 states have internal predecessors, (58), 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) [2021-11-25 20:17:27,419 INFO L276 IsEmpty]: Start isEmpty. Operand 3305 states and 5655 transitions. [2021-11-25 20:17:27,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-11-25 20:17:27,433 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:17:27,433 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:17:27,473 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8e183-df0a-4158-a466-8c6ee6125d25/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-25 20:17:27,661 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8e183-df0a-4158-a466-8c6ee6125d25/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:17:27,661 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:17:27,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:17:27,662 INFO L85 PathProgramCache]: Analyzing trace with hash 1486319381, now seen corresponding path program 1 times [2021-11-25 20:17:27,662 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:17:27,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802332311] [2021-11-25 20:17:27,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:17:27,662 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:17:27,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:17:27,739 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-25 20:17:27,739 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:17:27,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802332311] [2021-11-25 20:17:27,739 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802332311] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:17:27,740 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:17:27,740 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 20:17:27,740 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095152101] [2021-11-25 20:17:27,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:17:27,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:17:27,742 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:17:27,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:17:27,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:17:27,743 INFO L87 Difference]: Start difference. First operand 3305 states and 5655 transitions. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-25 20:17:28,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:17:28,335 INFO L93 Difference]: Finished difference Result 4595 states and 7568 transitions. [2021-11-25 20:17:28,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:17:28,336 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 94 [2021-11-25 20:17:28,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:17:28,365 INFO L225 Difference]: With dead ends: 4595 [2021-11-25 20:17:28,365 INFO L226 Difference]: Without dead ends: 3745 [2021-11-25 20:17:28,370 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:17:28,371 INFO L933 BasicCegarLoop]: 3276 mSDtfsCounter, 73 mSDsluCounter, 3444 mSDsCounter, 0 mSdLazyCounter, 504 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 6482 SdHoareTripleChecker+Invalid, 504 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 504 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 20:17:28,372 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 6482 Invalid, 504 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 504 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-25 20:17:28,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3745 states. [2021-11-25 20:17:28,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3745 to 3589. [2021-11-25 20:17:28,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3589 states, 3239 states have (on average 1.7409694350108058) internal successors, (5639), 3249 states have internal predecessors, (5639), 244 states have call successors, (244), 104 states have call predecessors, (244), 104 states have return successors, (244), 236 states have call predecessors, (244), 244 states have call successors, (244) [2021-11-25 20:17:28,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3589 states to 3589 states and 6127 transitions. [2021-11-25 20:17:28,554 INFO L78 Accepts]: Start accepts. Automaton has 3589 states and 6127 transitions. Word has length 94 [2021-11-25 20:17:28,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:17:28,555 INFO L470 AbstractCegarLoop]: Abstraction has 3589 states and 6127 transitions. [2021-11-25 20:17:28,555 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-25 20:17:28,555 INFO L276 IsEmpty]: Start isEmpty. Operand 3589 states and 6127 transitions. [2021-11-25 20:17:28,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-11-25 20:17:28,565 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:17:28,565 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-25 20:17:28,565 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-25 20:17:28,566 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:17:28,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:17:28,566 INFO L85 PathProgramCache]: Analyzing trace with hash 1141340575, now seen corresponding path program 1 times [2021-11-25 20:17:28,566 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:17:28,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105279160] [2021-11-25 20:17:28,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:17:28,567 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:17:28,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:17:28,644 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-11-25 20:17:28,645 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:17:28,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105279160] [2021-11-25 20:17:28,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105279160] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:17:28,645 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:17:28,646 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 20:17:28,646 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901452163] [2021-11-25 20:17:28,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:17:28,647 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:17:28,647 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:17:28,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:17:28,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:17:28,648 INFO L87 Difference]: Start difference. First operand 3589 states and 6127 transitions. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-25 20:17:29,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:17:29,213 INFO L93 Difference]: Finished difference Result 7402 states and 11820 transitions. [2021-11-25 20:17:29,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:17:29,214 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 126 [2021-11-25 20:17:29,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:17:29,257 INFO L225 Difference]: With dead ends: 7402 [2021-11-25 20:17:29,258 INFO L226 Difference]: Without dead ends: 5459 [2021-11-25 20:17:29,268 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:17:29,269 INFO L933 BasicCegarLoop]: 3216 mSDtfsCounter, 3409 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3409 SdHoareTripleChecker+Valid, 3351 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 20:17:29,269 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3409 Valid, 3351 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-25 20:17:29,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5459 states. [2021-11-25 20:17:29,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5459 to 5433. [2021-11-25 20:17:29,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5433 states, 4755 states have (on average 1.6502628811777076) internal successors, (7847), 4773 states have internal predecessors, (7847), 468 states have call successors, (468), 208 states have call predecessors, (468), 208 states have return successors, (468), 452 states have call predecessors, (468), 468 states have call successors, (468) [2021-11-25 20:17:29,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5433 states to 5433 states and 8783 transitions. [2021-11-25 20:17:29,513 INFO L78 Accepts]: Start accepts. Automaton has 5433 states and 8783 transitions. Word has length 126 [2021-11-25 20:17:29,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:17:29,514 INFO L470 AbstractCegarLoop]: Abstraction has 5433 states and 8783 transitions. [2021-11-25 20:17:29,514 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-25 20:17:29,514 INFO L276 IsEmpty]: Start isEmpty. Operand 5433 states and 8783 transitions. [2021-11-25 20:17:29,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-11-25 20:17:29,529 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:17:29,529 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-25 20:17:29,529 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-25 20:17:29,530 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:17:29,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:17:29,530 INFO L85 PathProgramCache]: Analyzing trace with hash 1017395726, now seen corresponding path program 1 times [2021-11-25 20:17:29,530 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:17:29,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462628707] [2021-11-25 20:17:29,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:17:29,531 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:17:29,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:17:29,599 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-11-25 20:17:29,599 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:17:29,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462628707] [2021-11-25 20:17:29,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462628707] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:17:29,600 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:17:29,600 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 20:17:29,600 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572839162] [2021-11-25 20:17:29,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:17:29,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:17:29,601 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:17:29,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:17:29,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:17:29,602 INFO L87 Difference]: Start difference. First operand 5433 states and 8783 transitions. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-25 20:17:30,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:17:30,230 INFO L93 Difference]: Finished difference Result 12862 states and 19764 transitions. [2021-11-25 20:17:30,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:17:30,231 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 126 [2021-11-25 20:17:30,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:17:30,293 INFO L225 Difference]: With dead ends: 12862 [2021-11-25 20:17:30,294 INFO L226 Difference]: Without dead ends: 9075 [2021-11-25 20:17:30,312 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:17:30,313 INFO L933 BasicCegarLoop]: 3216 mSDtfsCounter, 3411 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3411 SdHoareTripleChecker+Valid, 3351 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 20:17:30,314 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3411 Valid, 3351 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-25 20:17:30,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9075 states. [2021-11-25 20:17:30,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9075 to 9025. [2021-11-25 20:17:30,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9025 states, 7707 states have (on average 1.5703905540417802) internal successors, (12103), 7741 states have internal predecessors, (12103), 900 states have call successors, (900), 416 states have call predecessors, (900), 416 states have return successors, (900), 868 states have call predecessors, (900), 900 states have call successors, (900) [2021-11-25 20:17:30,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9025 states to 9025 states and 13903 transitions. [2021-11-25 20:17:30,867 INFO L78 Accepts]: Start accepts. Automaton has 9025 states and 13903 transitions. Word has length 126 [2021-11-25 20:17:30,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:17:30,868 INFO L470 AbstractCegarLoop]: Abstraction has 9025 states and 13903 transitions. [2021-11-25 20:17:30,870 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-25 20:17:30,870 INFO L276 IsEmpty]: Start isEmpty. Operand 9025 states and 13903 transitions. [2021-11-25 20:17:30,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-11-25 20:17:30,899 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:17:30,899 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-25 20:17:30,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-25 20:17:30,899 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:17:30,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:17:30,900 INFO L85 PathProgramCache]: Analyzing trace with hash -1645758354, now seen corresponding path program 1 times [2021-11-25 20:17:30,901 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:17:30,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299074731] [2021-11-25 20:17:30,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:17:30,901 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:17:30,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:17:30,979 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-11-25 20:17:30,980 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:17:30,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299074731] [2021-11-25 20:17:30,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299074731] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:17:30,980 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:17:30,981 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 20:17:30,981 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141355276] [2021-11-25 20:17:30,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:17:30,982 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:17:30,982 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:17:30,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:17:30,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:17:30,984 INFO L87 Difference]: Start difference. First operand 9025 states and 13903 transitions. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-25 20:17:31,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:17:31,928 INFO L93 Difference]: Finished difference Result 23494 states and 35060 transitions. [2021-11-25 20:17:31,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:17:31,929 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 126 [2021-11-25 20:17:31,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:17:32,013 INFO L225 Difference]: With dead ends: 23494 [2021-11-25 20:17:32,013 INFO L226 Difference]: Without dead ends: 16115 [2021-11-25 20:17:32,053 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:17:32,054 INFO L933 BasicCegarLoop]: 3230 mSDtfsCounter, 3414 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3414 SdHoareTripleChecker+Valid, 3365 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 20:17:32,058 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3414 Valid, 3365 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-25 20:17:32,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16115 states. [2021-11-25 20:17:32,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16115 to 16017. [2021-11-25 20:17:32,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16017 states, 13451 states have (on average 1.5088097539216414) internal successors, (20295), 13517 states have internal predecessors, (20295), 1732 states have call successors, (1732), 832 states have call predecessors, (1732), 832 states have return successors, (1732), 1668 states have call predecessors, (1732), 1732 states have call successors, (1732) [2021-11-25 20:17:32,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16017 states to 16017 states and 23759 transitions. [2021-11-25 20:17:32,821 INFO L78 Accepts]: Start accepts. Automaton has 16017 states and 23759 transitions. Word has length 126 [2021-11-25 20:17:32,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:17:32,822 INFO L470 AbstractCegarLoop]: Abstraction has 16017 states and 23759 transitions. [2021-11-25 20:17:32,822 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-25 20:17:32,822 INFO L276 IsEmpty]: Start isEmpty. Operand 16017 states and 23759 transitions. [2021-11-25 20:17:32,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-11-25 20:17:32,886 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:17:32,886 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-25 20:17:32,887 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-25 20:17:32,887 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:17:32,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:17:32,887 INFO L85 PathProgramCache]: Analyzing trace with hash 664134474, now seen corresponding path program 1 times [2021-11-25 20:17:32,888 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:17:32,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329659269] [2021-11-25 20:17:32,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:17:32,888 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:17:32,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:17:32,996 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 20 proven. 6 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2021-11-25 20:17:32,997 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:17:32,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329659269] [2021-11-25 20:17:32,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329659269] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:17:32,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547272844] [2021-11-25 20:17:32,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:17:32,998 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:17:32,998 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8e183-df0a-4158-a466-8c6ee6125d25/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:17:32,999 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8e183-df0a-4158-a466-8c6ee6125d25/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:17:33,021 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8e183-df0a-4158-a466-8c6ee6125d25/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-25 20:17:33,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:17:33,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 817 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-25 20:17:33,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:17:33,461 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 79 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-25 20:17:33,461 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:17:33,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [547272844] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:17:33,462 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 20:17:33,462 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2021-11-25 20:17:33,462 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21164893] [2021-11-25 20:17:33,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:17:33,463 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:17:33,463 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:17:33,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:17:33,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-25 20:17:33,465 INFO L87 Difference]: Start difference. First operand 16017 states and 23759 transitions. Second operand has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-25 20:17:34,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:17:34,739 INFO L93 Difference]: Finished difference Result 29013 states and 42769 transitions. [2021-11-25 20:17:34,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:17:34,740 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 145 [2021-11-25 20:17:34,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:17:34,828 INFO L225 Difference]: With dead ends: 29013 [2021-11-25 20:17:34,828 INFO L226 Difference]: Without dead ends: 21635 [2021-11-25 20:17:34,852 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-25 20:17:34,855 INFO L933 BasicCegarLoop]: 3305 mSDtfsCounter, 110 mSDsluCounter, 3445 mSDsCounter, 0 mSdLazyCounter, 508 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 6513 SdHoareTripleChecker+Invalid, 508 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 508 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-25 20:17:34,855 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 6513 Invalid, 508 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 508 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-25 20:17:34,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21635 states. [2021-11-25 20:17:35,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21635 to 18913. [2021-11-25 20:17:35,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18913 states, 16155 states have (on average 1.5355617455896007) internal successors, (24807), 16221 states have internal predecessors, (24807), 1828 states have call successors, (1828), 928 states have call predecessors, (1828), 928 states have return successors, (1828), 1764 states have call predecessors, (1828), 1828 states have call successors, (1828) [2021-11-25 20:17:35,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18913 states to 18913 states and 28463 transitions. [2021-11-25 20:17:35,896 INFO L78 Accepts]: Start accepts. Automaton has 18913 states and 28463 transitions. Word has length 145 [2021-11-25 20:17:35,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:17:35,897 INFO L470 AbstractCegarLoop]: Abstraction has 18913 states and 28463 transitions. [2021-11-25 20:17:35,897 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-25 20:17:35,897 INFO L276 IsEmpty]: Start isEmpty. Operand 18913 states and 28463 transitions. [2021-11-25 20:17:35,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-11-25 20:17:35,957 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:17:35,957 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-25 20:17:35,997 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8e183-df0a-4158-a466-8c6ee6125d25/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-25 20:17:36,185 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8e183-df0a-4158-a466-8c6ee6125d25/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-11-25 20:17:36,185 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:17:36,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:17:36,185 INFO L85 PathProgramCache]: Analyzing trace with hash -1411834222, now seen corresponding path program 2 times [2021-11-25 20:17:36,186 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:17:36,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794969098] [2021-11-25 20:17:36,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:17:36,186 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:17:36,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:17:36,299 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-25 20:17:36,299 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:17:36,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794969098] [2021-11-25 20:17:36,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794969098] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:17:36,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920977113] [2021-11-25 20:17:36,300 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 20:17:36,300 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:17:36,300 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8e183-df0a-4158-a466-8c6ee6125d25/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:17:36,301 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8e183-df0a-4158-a466-8c6ee6125d25/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:17:36,321 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8e183-df0a-4158-a466-8c6ee6125d25/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-25 20:17:36,448 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-25 20:17:36,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 20:17:36,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 531 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 20:17:36,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:17:36,714 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-25 20:17:36,714 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:17:36,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1920977113] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:17:36,715 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 20:17:36,715 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-11-25 20:17:36,715 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726771976] [2021-11-25 20:17:36,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:17:36,716 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:17:36,716 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:17:36,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:17:36,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-25 20:17:36,717 INFO L87 Difference]: Start difference. First operand 18913 states and 28463 transitions. Second operand has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-25 20:17:38,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:17:38,037 INFO L93 Difference]: Finished difference Result 29253 states and 44337 transitions. [2021-11-25 20:17:38,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:17:38,038 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 145 [2021-11-25 20:17:38,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:17:38,119 INFO L225 Difference]: With dead ends: 29253 [2021-11-25 20:17:38,119 INFO L226 Difference]: Without dead ends: 18979 [2021-11-25 20:17:38,159 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-25 20:17:38,159 INFO L933 BasicCegarLoop]: 3325 mSDtfsCounter, 141 mSDsluCounter, 3432 mSDsCounter, 0 mSdLazyCounter, 512 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 6518 SdHoareTripleChecker+Invalid, 515 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-25 20:17:38,161 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 6518 Invalid, 515 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 512 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-25 20:17:38,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18979 states. [2021-11-25 20:17:39,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18979 to 18849. [2021-11-25 20:17:39,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18849 states, 16091 states have (on average 1.5217823628115095) internal successors, (24487), 16157 states have internal predecessors, (24487), 1828 states have call successors, (1828), 928 states have call predecessors, (1828), 928 states have return successors, (1828), 1764 states have call predecessors, (1828), 1828 states have call successors, (1828) [2021-11-25 20:17:39,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18849 states to 18849 states and 28143 transitions. [2021-11-25 20:17:39,135 INFO L78 Accepts]: Start accepts. Automaton has 18849 states and 28143 transitions. Word has length 145 [2021-11-25 20:17:39,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:17:39,135 INFO L470 AbstractCegarLoop]: Abstraction has 18849 states and 28143 transitions. [2021-11-25 20:17:39,136 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-25 20:17:39,136 INFO L276 IsEmpty]: Start isEmpty. Operand 18849 states and 28143 transitions. [2021-11-25 20:17:39,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-11-25 20:17:39,179 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:17:39,180 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-25 20:17:39,221 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8e183-df0a-4158-a466-8c6ee6125d25/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-25 20:17:39,397 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8e183-df0a-4158-a466-8c6ee6125d25/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-25 20:17:39,397 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:17:39,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:17:39,397 INFO L85 PathProgramCache]: Analyzing trace with hash -931520620, now seen corresponding path program 1 times [2021-11-25 20:17:39,398 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:17:39,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324348919] [2021-11-25 20:17:39,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:17:39,398 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:17:39,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:17:39,516 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 10 proven. 43 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-25 20:17:39,516 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:17:39,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324348919] [2021-11-25 20:17:39,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324348919] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:17:39,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004178748] [2021-11-25 20:17:39,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:17:39,517 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:17:39,518 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8e183-df0a-4158-a466-8c6ee6125d25/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:17:39,521 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8e183-df0a-4158-a466-8c6ee6125d25/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:17:39,544 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8e183-df0a-4158-a466-8c6ee6125d25/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-25 20:17:39,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:17:39,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 823 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 20:17:39,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:17:39,981 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 80 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-25 20:17:39,981 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:17:39,982 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2004178748] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:17:39,982 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 20:17:39,982 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-11-25 20:17:39,984 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163142769] [2021-11-25 20:17:39,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:17:39,985 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:17:39,985 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:17:39,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:17:39,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-25 20:17:39,987 INFO L87 Difference]: Start difference. First operand 18849 states and 28143 transitions. Second operand has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-25 20:17:41,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:17:41,140 INFO L93 Difference]: Finished difference Result 27757 states and 41601 transitions. [2021-11-25 20:17:41,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:17:41,141 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 145 [2021-11-25 20:17:41,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:17:41,210 INFO L225 Difference]: With dead ends: 27757 [2021-11-25 20:17:41,211 INFO L226 Difference]: Without dead ends: 18915 [2021-11-25 20:17:41,232 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-25 20:17:41,233 INFO L933 BasicCegarLoop]: 3313 mSDtfsCounter, 138 mSDsluCounter, 3431 mSDsCounter, 0 mSdLazyCounter, 512 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 6505 SdHoareTripleChecker+Invalid, 514 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-25 20:17:41,234 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 6505 Invalid, 514 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 512 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-25 20:17:41,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18915 states. [2021-11-25 20:17:42,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18915 to 18689. [2021-11-25 20:17:42,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18689 states, 15931 states have (on average 1.5049274998430733) internal successors, (23975), 15997 states have internal predecessors, (23975), 1828 states have call successors, (1828), 928 states have call predecessors, (1828), 928 states have return successors, (1828), 1764 states have call predecessors, (1828), 1828 states have call successors, (1828) [2021-11-25 20:17:42,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18689 states to 18689 states and 27631 transitions. [2021-11-25 20:17:42,181 INFO L78 Accepts]: Start accepts. Automaton has 18689 states and 27631 transitions. Word has length 145 [2021-11-25 20:17:42,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:17:42,181 INFO L470 AbstractCegarLoop]: Abstraction has 18689 states and 27631 transitions. [2021-11-25 20:17:42,182 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-25 20:17:42,182 INFO L276 IsEmpty]: Start isEmpty. Operand 18689 states and 27631 transitions. [2021-11-25 20:17:42,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-11-25 20:17:42,223 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:17:42,223 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:17:42,269 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8e183-df0a-4158-a466-8c6ee6125d25/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-25 20:17:42,437 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8e183-df0a-4158-a466-8c6ee6125d25/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:17:42,437 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:17:42,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:17:42,437 INFO L85 PathProgramCache]: Analyzing trace with hash 180009554, now seen corresponding path program 1 times [2021-11-25 20:17:42,438 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:17:42,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831962266] [2021-11-25 20:17:42,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:17:42,438 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:17:42,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:17:42,535 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 10 proven. 41 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-25 20:17:42,536 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:17:42,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831962266] [2021-11-25 20:17:42,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831962266] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:17:42,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367923093] [2021-11-25 20:17:42,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:17:42,537 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:17:42,537 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8e183-df0a-4158-a466-8c6ee6125d25/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:17:42,538 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8e183-df0a-4158-a466-8c6ee6125d25/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:17:42,559 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8e183-df0a-4158-a466-8c6ee6125d25/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-25 20:17:42,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:17:42,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 829 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-25 20:17:42,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:17:42,997 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 70 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-25 20:17:42,997 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:17:42,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1367923093] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:17:42,998 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 20:17:42,998 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-11-25 20:17:42,998 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422307102] [2021-11-25 20:17:42,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:17:42,999 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:17:42,999 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:17:43,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:17:43,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-25 20:17:43,000 INFO L87 Difference]: Start difference. First operand 18689 states and 27631 transitions. Second operand has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-25 20:17:44,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:17:44,163 INFO L93 Difference]: Finished difference Result 31061 states and 44714 transitions. [2021-11-25 20:17:44,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:17:44,164 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 145 [2021-11-25 20:17:44,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:17:44,226 INFO L225 Difference]: With dead ends: 31061 [2021-11-25 20:17:44,226 INFO L226 Difference]: Without dead ends: 22459 [2021-11-25 20:17:44,245 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-25 20:17:44,245 INFO L933 BasicCegarLoop]: 3220 mSDtfsCounter, 3417 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3417 SdHoareTripleChecker+Valid, 3259 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-25 20:17:44,246 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3417 Valid, 3259 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-25 20:17:44,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22459 states. [2021-11-25 20:17:44,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22459 to 22459. [2021-11-25 20:17:44,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22459 states, 19321 states have (on average 1.4494591377257906) internal successors, (28005), 19387 states have internal predecessors, (28005), 1954 states have call successors, (1954), 1182 states have call predecessors, (1954), 1182 states have return successors, (1954), 1890 states have call predecessors, (1954), 1954 states have call successors, (1954) [2021-11-25 20:17:45,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22459 states to 22459 states and 31913 transitions. [2021-11-25 20:17:45,013 INFO L78 Accepts]: Start accepts. Automaton has 22459 states and 31913 transitions. Word has length 145 [2021-11-25 20:17:45,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:17:45,014 INFO L470 AbstractCegarLoop]: Abstraction has 22459 states and 31913 transitions. [2021-11-25 20:17:45,014 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-25 20:17:45,015 INFO L276 IsEmpty]: Start isEmpty. Operand 22459 states and 31913 transitions. [2021-11-25 20:17:45,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-11-25 20:17:45,078 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:17:45,078 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:17:45,120 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8e183-df0a-4158-a466-8c6ee6125d25/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-25 20:17:45,305 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8e183-df0a-4158-a466-8c6ee6125d25/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-25 20:17:45,305 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:17:45,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:17:45,306 INFO L85 PathProgramCache]: Analyzing trace with hash -2019754395, now seen corresponding path program 1 times [2021-11-25 20:17:45,306 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:17:45,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997629192] [2021-11-25 20:17:45,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:17:45,306 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:17:45,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:17:45,417 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 10 proven. 42 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-25 20:17:45,418 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:17:45,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997629192] [2021-11-25 20:17:45,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997629192] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:17:45,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031832912] [2021-11-25 20:17:45,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:17:45,418 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:17:45,419 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8e183-df0a-4158-a466-8c6ee6125d25/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:17:45,421 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8e183-df0a-4158-a466-8c6ee6125d25/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:17:45,441 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8e183-df0a-4158-a466-8c6ee6125d25/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-25 20:17:45,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:17:45,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 828 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-25 20:17:45,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:17:46,032 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 87 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-25 20:17:46,032 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:17:46,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2031832912] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:17:46,033 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 20:17:46,033 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2021-11-25 20:17:46,033 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445175659] [2021-11-25 20:17:46,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:17:46,034 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 20:17:46,034 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:17:46,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 20:17:46,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-25 20:17:46,035 INFO L87 Difference]: Start difference. First operand 22459 states and 31913 transitions. Second operand has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-25 20:17:48,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:17:48,034 INFO L93 Difference]: Finished difference Result 64557 states and 89721 transitions. [2021-11-25 20:17:48,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 20:17:48,034 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) Word has length 146 [2021-11-25 20:17:48,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:17:48,174 INFO L225 Difference]: With dead ends: 64557 [2021-11-25 20:17:48,174 INFO L226 Difference]: Without dead ends: 43745 [2021-11-25 20:17:48,214 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-11-25 20:17:48,215 INFO L933 BasicCegarLoop]: 3357 mSDtfsCounter, 3435 mSDsluCounter, 3754 mSDsCounter, 0 mSdLazyCounter, 575 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3435 SdHoareTripleChecker+Valid, 6825 SdHoareTripleChecker+Invalid, 578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 575 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-25 20:17:48,215 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3435 Valid, 6825 Invalid, 578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 575 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-25 20:17:48,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43745 states. [2021-11-25 20:17:49,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43745 to 43679. [2021-11-25 20:17:49,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43679 states, 37413 states have (on average 1.4130115200598723) internal successors, (52865), 37607 states have internal predecessors, (52865), 3838 states have call successors, (3838), 2362 states have call predecessors, (3838), 2426 states have return successors, (4030), 3710 states have call predecessors, (4030), 3838 states have call successors, (4030) [2021-11-25 20:17:49,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43679 states to 43679 states and 60733 transitions. [2021-11-25 20:17:49,869 INFO L78 Accepts]: Start accepts. Automaton has 43679 states and 60733 transitions. Word has length 146 [2021-11-25 20:17:49,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:17:49,870 INFO L470 AbstractCegarLoop]: Abstraction has 43679 states and 60733 transitions. [2021-11-25 20:17:49,870 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-25 20:17:49,871 INFO L276 IsEmpty]: Start isEmpty. Operand 43679 states and 60733 transitions. [2021-11-25 20:17:49,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-11-25 20:17:49,952 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:17:49,953 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:17:49,991 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8e183-df0a-4158-a466-8c6ee6125d25/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-25 20:17:50,169 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8e183-df0a-4158-a466-8c6ee6125d25/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-25 20:17:50,169 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:17:50,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:17:50,169 INFO L85 PathProgramCache]: Analyzing trace with hash -1425966138, now seen corresponding path program 1 times [2021-11-25 20:17:50,169 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:17:50,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670213553] [2021-11-25 20:17:50,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:17:50,170 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:17:50,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:17:50,256 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 10 proven. 43 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-25 20:17:50,256 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:17:50,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670213553] [2021-11-25 20:17:50,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670213553] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:17:50,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609420534] [2021-11-25 20:17:50,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:17:50,257 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:17:50,258 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8e183-df0a-4158-a466-8c6ee6125d25/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:17:50,259 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8e183-df0a-4158-a466-8c6ee6125d25/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:17:50,272 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8e183-df0a-4158-a466-8c6ee6125d25/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-25 20:17:50,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:17:50,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 825 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 20:17:50,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:17:50,891 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-25 20:17:50,892 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:17:50,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [609420534] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:17:50,892 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 20:17:50,892 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-11-25 20:17:50,893 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946448942] [2021-11-25 20:17:50,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:17:50,893 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:17:50,893 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:17:50,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:17:50,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-25 20:17:50,894 INFO L87 Difference]: Start difference. First operand 43679 states and 60733 transitions. Second operand has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-25 20:17:53,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:17:53,183 INFO L93 Difference]: Finished difference Result 101577 states and 142240 transitions. [2021-11-25 20:17:53,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:17:53,184 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 146 [2021-11-25 20:17:53,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:17:53,408 INFO L225 Difference]: With dead ends: 101577 [2021-11-25 20:17:53,408 INFO L226 Difference]: Without dead ends: 59545 [2021-11-25 20:17:53,480 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-25 20:17:53,481 INFO L933 BasicCegarLoop]: 3225 mSDtfsCounter, 75 mSDsluCounter, 3434 mSDsCounter, 0 mSdLazyCounter, 489 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 6422 SdHoareTripleChecker+Invalid, 491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 489 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 20:17:53,481 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 6422 Invalid, 491 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 489 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-25 20:17:53,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59545 states. [2021-11-25 20:17:55,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59545 to 49227. [2021-11-25 20:17:55,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49227 states, 42571 states have (on average 1.438890324399239) internal successors, (61255), 42767 states have internal predecessors, (61255), 4033 states have call successors, (4033), 2557 states have call predecessors, (4033), 2621 states have return successors, (4225), 3903 states have call predecessors, (4225), 4033 states have call successors, (4225) [2021-11-25 20:17:55,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49227 states to 49227 states and 69513 transitions. [2021-11-25 20:17:55,802 INFO L78 Accepts]: Start accepts. Automaton has 49227 states and 69513 transitions. Word has length 146 [2021-11-25 20:17:55,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:17:55,804 INFO L470 AbstractCegarLoop]: Abstraction has 49227 states and 69513 transitions. [2021-11-25 20:17:55,804 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-25 20:17:55,805 INFO L276 IsEmpty]: Start isEmpty. Operand 49227 states and 69513 transitions. [2021-11-25 20:17:56,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-11-25 20:17:56,071 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:17:56,071 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:17:56,095 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8e183-df0a-4158-a466-8c6ee6125d25/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-25 20:17:56,273 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8e183-df0a-4158-a466-8c6ee6125d25/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-25 20:17:56,273 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:17:56,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:17:56,273 INFO L85 PathProgramCache]: Analyzing trace with hash 115381327, now seen corresponding path program 1 times [2021-11-25 20:17:56,274 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:17:56,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797286855] [2021-11-25 20:17:56,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:17:56,274 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:17:56,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:17:56,358 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 13 proven. 43 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-25 20:17:56,358 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:17:56,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797286855] [2021-11-25 20:17:56,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797286855] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:17:56,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972189825] [2021-11-25 20:17:56,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:17:56,359 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:17:56,360 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8e183-df0a-4158-a466-8c6ee6125d25/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:17:56,361 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8e183-df0a-4158-a466-8c6ee6125d25/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:17:56,389 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8e183-df0a-4158-a466-8c6ee6125d25/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-25 20:17:56,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:17:56,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 832 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-25 20:17:56,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:17:56,887 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-25 20:17:56,887 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:17:56,887 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [972189825] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:17:56,887 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 20:17:56,888 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 7 [2021-11-25 20:17:56,888 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694220351] [2021-11-25 20:17:56,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:17:56,889 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 20:17:56,889 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:17:56,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 20:17:56,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-25 20:17:56,890 INFO L87 Difference]: Start difference. First operand 49227 states and 69513 transitions. Second operand has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 6 states have internal predecessors, (92), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-25 20:17:59,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:17:59,327 INFO L93 Difference]: Finished difference Result 87102 states and 121700 transitions. [2021-11-25 20:17:59,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-25 20:17:59,328 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 6 states have internal predecessors, (92), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 147 [2021-11-25 20:17:59,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:17:59,480 INFO L225 Difference]: With dead ends: 87102 [2021-11-25 20:17:59,480 INFO L226 Difference]: Without dead ends: 39522 [2021-11-25 20:17:59,559 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-11-25 20:17:59,560 INFO L933 BasicCegarLoop]: 3209 mSDtfsCounter, 7086 mSDsluCounter, 6780 mSDsCounter, 0 mSdLazyCounter, 779 mSolverCounterSat, 169 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7101 SdHoareTripleChecker+Valid, 9522 SdHoareTripleChecker+Invalid, 948 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 169 IncrementalHoareTripleChecker+Valid, 779 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-25 20:17:59,561 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7101 Valid, 9522 Invalid, 948 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [169 Valid, 779 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-25 20:17:59,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39522 states. [2021-11-25 20:18:01,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39522 to 38140. [2021-11-25 20:18:01,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38140 states, 33039 states have (on average 1.4396622173794607) internal successors, (47565), 33202 states have internal predecessors, (47565), 3049 states have call successors, (3049), 1922 states have call predecessors, (3049), 2050 states have return successors, (3177), 3016 states have call predecessors, (3177), 3049 states have call successors, (3177) [2021-11-25 20:18:01,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38140 states to 38140 states and 53791 transitions. [2021-11-25 20:18:01,311 INFO L78 Accepts]: Start accepts. Automaton has 38140 states and 53791 transitions. Word has length 147 [2021-11-25 20:18:01,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:18:01,312 INFO L470 AbstractCegarLoop]: Abstraction has 38140 states and 53791 transitions. [2021-11-25 20:18:01,312 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 6 states have internal predecessors, (92), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-25 20:18:01,312 INFO L276 IsEmpty]: Start isEmpty. Operand 38140 states and 53791 transitions. [2021-11-25 20:18:01,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-11-25 20:18:01,368 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:18:01,368 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-25 20:18:01,393 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8e183-df0a-4158-a466-8c6ee6125d25/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-25 20:18:01,569 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8e183-df0a-4158-a466-8c6ee6125d25/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:18:01,569 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:18:01,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:18:01,569 INFO L85 PathProgramCache]: Analyzing trace with hash -1300214877, now seen corresponding path program 2 times [2021-11-25 20:18:01,570 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:18:01,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941183699] [2021-11-25 20:18:01,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:18:01,570 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:18:01,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:18:01,652 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 14 proven. 43 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-25 20:18:01,653 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:18:01,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941183699] [2021-11-25 20:18:01,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941183699] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:18:01,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693258651] [2021-11-25 20:18:01,654 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 20:18:01,654 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:18:01,654 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8e183-df0a-4158-a466-8c6ee6125d25/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:18:01,655 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8e183-df0a-4158-a466-8c6ee6125d25/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:18:01,684 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8e183-df0a-4158-a466-8c6ee6125d25/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-25 20:18:01,866 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-25 20:18:01,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 20:18:01,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 778 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 20:18:01,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:18:02,072 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-25 20:18:02,072 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:18:02,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1693258651] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:18:02,073 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 20:18:02,073 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-11-25 20:18:02,074 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612577295] [2021-11-25 20:18:02,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:18:02,074 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:18:02,075 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:18:02,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:18:02,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-25 20:18:02,075 INFO L87 Difference]: Start difference. First operand 38140 states and 53791 transitions. Second operand has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-25 20:18:03,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:18:03,664 INFO L93 Difference]: Finished difference Result 50539 states and 71165 transitions. [2021-11-25 20:18:03,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:18:03,665 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 148 [2021-11-25 20:18:03,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:18:03,791 INFO L225 Difference]: With dead ends: 50539 [2021-11-25 20:18:03,791 INFO L226 Difference]: Without dead ends: 36572 [2021-11-25 20:18:03,834 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-25 20:18:03,837 INFO L933 BasicCegarLoop]: 3219 mSDtfsCounter, 40 mSDsluCounter, 3433 mSDsCounter, 0 mSdLazyCounter, 493 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 6415 SdHoareTripleChecker+Invalid, 493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 493 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-25 20:18:03,837 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 6415 Invalid, 493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 493 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-25 20:18:03,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36572 states. [2021-11-25 20:18:05,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36572 to 34460. [2021-11-25 20:18:05,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34460 states, 29743 states have (on average 1.4625626197760817) internal successors, (43501), 29810 states have internal predecessors, (43501), 2921 states have call successors, (2921), 1794 states have call predecessors, (2921), 1794 states have return successors, (2921), 2856 states have call predecessors, (2921), 2921 states have call successors, (2921) [2021-11-25 20:18:05,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34460 states to 34460 states and 49343 transitions. [2021-11-25 20:18:05,577 INFO L78 Accepts]: Start accepts. Automaton has 34460 states and 49343 transitions. Word has length 148 [2021-11-25 20:18:05,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:18:05,577 INFO L470 AbstractCegarLoop]: Abstraction has 34460 states and 49343 transitions. [2021-11-25 20:18:05,578 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-25 20:18:05,578 INFO L276 IsEmpty]: Start isEmpty. Operand 34460 states and 49343 transitions. [2021-11-25 20:18:05,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-11-25 20:18:05,630 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:18:05,630 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-25 20:18:05,657 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8e183-df0a-4158-a466-8c6ee6125d25/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-25 20:18:05,833 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8e183-df0a-4158-a466-8c6ee6125d25/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-25 20:18:05,833 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:18:05,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:18:05,833 INFO L85 PathProgramCache]: Analyzing trace with hash 1761465248, now seen corresponding path program 1 times [2021-11-25 20:18:05,834 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:18:05,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201036277] [2021-11-25 20:18:05,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:18:05,834 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:18:05,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:18:05,911 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 15 proven. 43 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-25 20:18:05,912 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:18:05,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201036277] [2021-11-25 20:18:05,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201036277] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:18:05,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000886236] [2021-11-25 20:18:05,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:18:05,913 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:18:05,913 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8e183-df0a-4158-a466-8c6ee6125d25/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:18:05,914 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8e183-df0a-4158-a466-8c6ee6125d25/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:18:05,925 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8e183-df0a-4158-a466-8c6ee6125d25/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-25 20:18:06,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:18:06,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 839 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-25 20:18:06,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:18:06,352 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-25 20:18:06,352 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:18:06,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2000886236] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:18:06,353 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 20:18:06,353 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2021-11-25 20:18:06,353 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390509502] [2021-11-25 20:18:06,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:18:06,353 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 20:18:06,354 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:18:06,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 20:18:06,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-11-25 20:18:06,354 INFO L87 Difference]: Start difference. First operand 34460 states and 49343 transitions. Second operand has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-25 20:18:08,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:18:08,862 INFO L93 Difference]: Finished difference Result 82716 states and 117005 transitions. [2021-11-25 20:18:08,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-25 20:18:08,862 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 148 [2021-11-25 20:18:08,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:18:09,045 INFO L225 Difference]: With dead ends: 82716 [2021-11-25 20:18:09,045 INFO L226 Difference]: Without dead ends: 49954 [2021-11-25 20:18:09,125 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-11-25 20:18:09,126 INFO L933 BasicCegarLoop]: 3200 mSDtfsCounter, 7072 mSDsluCounter, 6769 mSDsCounter, 0 mSdLazyCounter, 797 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7087 SdHoareTripleChecker+Valid, 9503 SdHoareTripleChecker+Invalid, 929 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 797 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-25 20:18:09,126 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7087 Valid, 9503 Invalid, 929 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 797 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-25 20:18:09,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49954 states. [2021-11-25 20:18:11,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49954 to 49952. [2021-11-25 20:18:11,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49952 states, 42939 states have (on average 1.438529076131256) internal successors, (61769), 43038 states have internal predecessors, (61769), 4325 states have call successors, (4325), 2686 states have call predecessors, (4325), 2686 states have return successors, (4325), 4228 states have call predecessors, (4325), 4325 states have call successors, (4325) [2021-11-25 20:18:11,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49952 states to 49952 states and 70419 transitions. [2021-11-25 20:18:11,585 INFO L78 Accepts]: Start accepts. Automaton has 49952 states and 70419 transitions. Word has length 148 [2021-11-25 20:18:11,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:18:11,585 INFO L470 AbstractCegarLoop]: Abstraction has 49952 states and 70419 transitions. [2021-11-25 20:18:11,585 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-25 20:18:11,586 INFO L276 IsEmpty]: Start isEmpty. Operand 49952 states and 70419 transitions. [2021-11-25 20:18:11,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-11-25 20:18:11,667 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:18:11,667 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-25 20:18:11,693 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8e183-df0a-4158-a466-8c6ee6125d25/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-25 20:18:11,867 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8e183-df0a-4158-a466-8c6ee6125d25/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-25 20:18:11,868 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:18:11,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:18:11,868 INFO L85 PathProgramCache]: Analyzing trace with hash 36777486, now seen corresponding path program 1 times [2021-11-25 20:18:11,868 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:18:11,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418701561] [2021-11-25 20:18:11,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:18:11,868 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:18:11,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:18:11,955 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 15 proven. 43 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-25 20:18:11,955 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:18:11,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418701561] [2021-11-25 20:18:11,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418701561] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:18:11,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358956266] [2021-11-25 20:18:11,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:18:11,956 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:18:11,957 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8e183-df0a-4158-a466-8c6ee6125d25/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:18:11,957 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8e183-df0a-4158-a466-8c6ee6125d25/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:18:11,963 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01f8e183-df0a-4158-a466-8c6ee6125d25/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-25 20:18:12,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:18:12,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 853 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-25 20:18:12,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:18:12,417 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 66 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-25 20:18:12,417 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:18:12,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [358956266] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:18:12,417 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 20:18:12,417 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2021-11-25 20:18:12,418 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771344191] [2021-11-25 20:18:12,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:18:12,418 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 20:18:12,418 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:18:12,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 20:18:12,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-11-25 20:18:12,419 INFO L87 Difference]: Start difference. First operand 49952 states and 70419 transitions. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-25 20:18:16,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:18:16,222 INFO L93 Difference]: Finished difference Result 120784 states and 168585 transitions. [2021-11-25 20:18:16,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-25 20:18:16,222 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 150 [2021-11-25 20:18:16,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:18:16,423 INFO L225 Difference]: With dead ends: 120784 [2021-11-25 20:18:16,423 INFO L226 Difference]: Without dead ends: 72530 [2021-11-25 20:18:16,499 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-11-25 20:18:16,500 INFO L933 BasicCegarLoop]: 3205 mSDtfsCounter, 3717 mSDsluCounter, 6848 mSDsCounter, 0 mSdLazyCounter, 830 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3732 SdHoareTripleChecker+Valid, 9572 SdHoareTripleChecker+Invalid, 945 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 830 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-25 20:18:16,501 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3732 Valid, 9572 Invalid, 945 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 830 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-25 20:18:16,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72530 states.