./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/Problem05_label45+token_ring.07.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_e1c508cd-fc13-4a53-b512-c475d34afd5c/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1c508cd-fc13-4a53-b512-c475d34afd5c/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_e1c508cd-fc13-4a53-b512-c475d34afd5c/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1c508cd-fc13-4a53-b512-c475d34afd5c/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/Problem05_label45+token_ring.07.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1c508cd-fc13-4a53-b512-c475d34afd5c/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_e1c508cd-fc13-4a53-b512-c475d34afd5c/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 ea2a15ada4a316287b701d4046ee75147e37e2af1b0a94d8406d231cafa83990 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 17:44:55,719 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 17:44:55,723 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 17:44:55,786 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 17:44:55,787 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 17:44:55,790 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 17:44:55,793 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 17:44:55,797 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 17:44:55,800 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 17:44:55,805 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 17:44:55,806 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 17:44:55,808 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 17:44:55,809 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 17:44:55,811 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 17:44:55,814 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 17:44:55,819 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 17:44:55,821 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 17:44:55,822 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 17:44:55,824 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 17:44:55,834 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 17:44:55,836 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 17:44:55,841 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 17:44:55,844 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 17:44:55,845 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 17:44:55,854 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 17:44:55,854 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 17:44:55,855 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 17:44:55,857 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 17:44:55,857 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 17:44:55,859 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 17:44:55,859 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 17:44:55,860 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 17:44:55,862 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 17:44:55,863 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 17:44:55,865 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 17:44:55,865 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 17:44:55,866 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 17:44:55,866 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 17:44:55,866 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 17:44:55,867 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 17:44:55,867 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 17:44:55,868 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1c508cd-fc13-4a53-b512-c475d34afd5c/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-25 17:44:55,913 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 17:44:55,914 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 17:44:55,915 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 17:44:55,915 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 17:44:55,916 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 17:44:55,922 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 17:44:55,922 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 17:44:55,922 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 17:44:55,922 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 17:44:55,923 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 17:44:55,924 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 17:44:55,924 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 17:44:55,924 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 17:44:55,924 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 17:44:55,924 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 17:44:55,925 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 17:44:55,925 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 17:44:55,925 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 17:44:55,926 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 17:44:55,926 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 17:44:55,926 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 17:44:55,926 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 17:44:55,927 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 17:44:55,927 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 17:44:55,927 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 17:44:55,927 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 17:44:55,929 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 17:44:55,929 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 17:44:55,929 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 17:44:55,929 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 17:44:55,930 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 17:44:55,930 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 17:44:55,930 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 17:44:55,930 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 17:44:55,930 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 17:44:55,931 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 17:44:55,931 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 17:44:55,931 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 17:44:55,931 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 17:44:55,931 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 17:44:55,932 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 17:44:55,932 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_e1c508cd-fc13-4a53-b512-c475d34afd5c/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1c508cd-fc13-4a53-b512-c475d34afd5c/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ea2a15ada4a316287b701d4046ee75147e37e2af1b0a94d8406d231cafa83990 [2021-11-25 17:44:56,200 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 17:44:56,225 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 17:44:56,227 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 17:44:56,228 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 17:44:56,229 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 17:44:56,230 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1c508cd-fc13-4a53-b512-c475d34afd5c/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/combinations/Problem05_label45+token_ring.07.cil-2.c [2021-11-25 17:44:56,305 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1c508cd-fc13-4a53-b512-c475d34afd5c/bin/utaipan-eEHZpOm5b7/data/3b78d4d31/b5de57d3bd794db1a8185916d0af94f6/FLAG87bf72e2b [2021-11-25 17:44:57,341 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 17:44:57,342 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1c508cd-fc13-4a53-b512-c475d34afd5c/sv-benchmarks/c/combinations/Problem05_label45+token_ring.07.cil-2.c [2021-11-25 17:44:57,406 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1c508cd-fc13-4a53-b512-c475d34afd5c/bin/utaipan-eEHZpOm5b7/data/3b78d4d31/b5de57d3bd794db1a8185916d0af94f6/FLAG87bf72e2b [2021-11-25 17:44:57,671 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1c508cd-fc13-4a53-b512-c475d34afd5c/bin/utaipan-eEHZpOm5b7/data/3b78d4d31/b5de57d3bd794db1a8185916d0af94f6 [2021-11-25 17:44:57,673 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 17:44:57,675 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 17:44:57,676 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 17:44:57,676 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 17:44:57,694 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 17:44:57,695 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:44:57" (1/1) ... [2021-11-25 17:44:57,696 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@44fc5daf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:44:57, skipping insertion in model container [2021-11-25 17:44:57,696 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:44:57" (1/1) ... [2021-11-25 17:44:57,703 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 17:44:57,916 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 17:45:00,322 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_e1c508cd-fc13-4a53-b512-c475d34afd5c/sv-benchmarks/c/combinations/Problem05_label45+token_ring.07.cil-2.c[380323,380336] [2021-11-25 17:45:00,356 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_e1c508cd-fc13-4a53-b512-c475d34afd5c/sv-benchmarks/c/combinations/Problem05_label45+token_ring.07.cil-2.c[383339,383352] [2021-11-25 17:45:00,656 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 17:45:00,666 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 17:45:01,985 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_e1c508cd-fc13-4a53-b512-c475d34afd5c/sv-benchmarks/c/combinations/Problem05_label45+token_ring.07.cil-2.c[380323,380336] [2021-11-25 17:45:01,991 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_e1c508cd-fc13-4a53-b512-c475d34afd5c/sv-benchmarks/c/combinations/Problem05_label45+token_ring.07.cil-2.c[383339,383352] [2021-11-25 17:45:02,015 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 17:45:02,144 INFO L208 MainTranslator]: Completed translation [2021-11-25 17:45:02,144 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:45:02 WrapperNode [2021-11-25 17:45:02,144 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 17:45:02,146 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 17:45:02,146 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 17:45:02,146 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 17:45:02,155 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:45:02" (1/1) ... [2021-11-25 17:45:02,294 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:45:02" (1/1) ... [2021-11-25 17:45:02,734 INFO L137 Inliner]: procedures = 58, calls = 63, calls flagged for inlining = 35, calls inlined = 35, statements flattened = 12914 [2021-11-25 17:45:02,735 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 17:45:02,736 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 17:45:02,737 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 17:45:02,737 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 17:45:02,746 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:45:02" (1/1) ... [2021-11-25 17:45:02,747 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:45:02" (1/1) ... [2021-11-25 17:45:02,920 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:45:02" (1/1) ... [2021-11-25 17:45:02,921 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:45:02" (1/1) ... [2021-11-25 17:45:03,095 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:45:02" (1/1) ... [2021-11-25 17:45:03,154 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:45:02" (1/1) ... [2021-11-25 17:45:03,239 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:45:02" (1/1) ... [2021-11-25 17:45:03,346 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 17:45:03,348 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 17:45:03,348 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 17:45:03,348 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 17:45:03,349 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:45:02" (1/1) ... [2021-11-25 17:45:03,356 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 17:45:03,367 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1c508cd-fc13-4a53-b512-c475d34afd5c/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 17:45:03,379 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1c508cd-fc13-4a53-b512-c475d34afd5c/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 17:45:03,407 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1c508cd-fc13-4a53-b512-c475d34afd5c/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 17:45:03,426 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 17:45:03,426 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2021-11-25 17:45:03,427 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2021-11-25 17:45:03,427 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-11-25 17:45:03,427 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-11-25 17:45:03,427 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2021-11-25 17:45:03,427 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2021-11-25 17:45:03,427 INFO L130 BoogieDeclarations]: Found specification of procedure error [2021-11-25 17:45:03,428 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2021-11-25 17:45:03,428 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2021-11-25 17:45:03,428 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2021-11-25 17:45:03,428 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2021-11-25 17:45:03,428 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2021-11-25 17:45:03,428 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2021-11-25 17:45:03,429 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2021-11-25 17:45:03,429 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 17:45:03,429 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 17:45:03,429 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 17:45:03,615 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 17:45:03,617 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 17:45:11,235 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 17:45:13,447 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 17:45:13,448 INFO L301 CfgBuilder]: Removed 11 assume(true) statements. [2021-11-25 17:45:13,457 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:45:13 BoogieIcfgContainer [2021-11-25 17:45:13,457 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 17:45:13,459 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 17:45:13,459 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 17:45:13,463 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 17:45:13,463 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 05:44:57" (1/3) ... [2021-11-25 17:45:13,464 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11fbdf53 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:45:13, skipping insertion in model container [2021-11-25 17:45:13,464 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:45:02" (2/3) ... [2021-11-25 17:45:13,465 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11fbdf53 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:45:13, skipping insertion in model container [2021-11-25 17:45:13,465 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:45:13" (3/3) ... [2021-11-25 17:45:13,466 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem05_label45+token_ring.07.cil-2.c [2021-11-25 17:45:13,477 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 17:45:13,477 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-25 17:45:13,545 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 17:45:13,555 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 17:45:13,555 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-25 17:45:13,621 INFO L276 IsEmpty]: Start isEmpty. Operand has 1782 states, 1749 states have (on average 1.9662664379645511) internal successors, (3439), 1754 states have internal predecessors, (3439), 23 states have call successors, (23), 7 states have call predecessors, (23), 7 states have return successors, (23), 22 states have call predecessors, (23), 23 states have call successors, (23) [2021-11-25 17:45:13,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-25 17:45:13,631 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:45:13,631 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 17:45:13,632 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 17:45:13,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:45:13,637 INFO L85 PathProgramCache]: Analyzing trace with hash 193661949, now seen corresponding path program 1 times [2021-11-25 17:45:13,647 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:45:13,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919079090] [2021-11-25 17:45:13,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:45:13,649 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:45:13,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:45:14,107 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 17:45:14,107 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:45:14,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919079090] [2021-11-25 17:45:14,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919079090] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:45:14,109 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:45:14,109 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 17:45:14,110 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361907838] [2021-11-25 17:45:14,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:45:14,115 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 17:45:14,116 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:45:14,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 17:45:14,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 17:45:14,150 INFO L87 Difference]: Start difference. First operand has 1782 states, 1749 states have (on average 1.9662664379645511) internal successors, (3439), 1754 states have internal predecessors, (3439), 23 states have call successors, (23), 7 states have call predecessors, (23), 7 states have return successors, (23), 22 states have call predecessors, (23), 23 states have call successors, (23) Second operand has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-25 17:45:15,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:45:15,102 INFO L93 Difference]: Finished difference Result 3679 states and 7167 transitions. [2021-11-25 17:45:15,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 17:45:15,105 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 53 [2021-11-25 17:45:15,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:45:15,138 INFO L225 Difference]: With dead ends: 3679 [2021-11-25 17:45:15,138 INFO L226 Difference]: Without dead ends: 1896 [2021-11-25 17:45:15,150 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 17:45:15,157 INFO L933 BasicCegarLoop]: 3368 mSDtfsCounter, 3622 mSDsluCounter, 3567 mSDsCounter, 0 mSdLazyCounter, 650 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3622 SdHoareTripleChecker+Valid, 6656 SdHoareTripleChecker+Invalid, 664 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 650 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-25 17:45:15,159 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3622 Valid, 6656 Invalid, 664 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 650 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-25 17:45:15,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1896 states. [2021-11-25 17:45:15,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1896 to 1895. [2021-11-25 17:45:15,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1895 states, 1841 states have (on average 1.9369907658881043) internal successors, (3566), 1845 states have internal predecessors, (3566), 40 states have call successors, (40), 13 states have call predecessors, (40), 12 states have return successors, (38), 37 states have call predecessors, (38), 38 states have call successors, (38) [2021-11-25 17:45:15,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1895 states to 1895 states and 3644 transitions. [2021-11-25 17:45:15,330 INFO L78 Accepts]: Start accepts. Automaton has 1895 states and 3644 transitions. Word has length 53 [2021-11-25 17:45:15,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:45:15,331 INFO L470 AbstractCegarLoop]: Abstraction has 1895 states and 3644 transitions. [2021-11-25 17:45:15,332 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-25 17:45:15,332 INFO L276 IsEmpty]: Start isEmpty. Operand 1895 states and 3644 transitions. [2021-11-25 17:45:15,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-11-25 17:45:15,340 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:45:15,340 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 17:45:15,340 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 17:45:15,341 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 17:45:15,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:45:15,342 INFO L85 PathProgramCache]: Analyzing trace with hash -884054711, now seen corresponding path program 1 times [2021-11-25 17:45:15,342 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:45:15,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282478296] [2021-11-25 17:45:15,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:45:15,343 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:45:15,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:45:15,529 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-25 17:45:15,530 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:45:15,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282478296] [2021-11-25 17:45:15,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282478296] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 17:45:15,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010593355] [2021-11-25 17:45:15,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:45:15,532 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 17:45:15,532 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1c508cd-fc13-4a53-b512-c475d34afd5c/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 17:45:15,537 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1c508cd-fc13-4a53-b512-c475d34afd5c/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 17:45:15,562 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1c508cd-fc13-4a53-b512-c475d34afd5c/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-25 17:45:15,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:45:15,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 709 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-25 17:45:15,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:45:15,947 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-25 17:45:15,947 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 17:45:15,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2010593355] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:45:15,948 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 17:45:15,948 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2021-11-25 17:45:15,949 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395914949] [2021-11-25 17:45:15,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:45:15,950 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 17:45:15,950 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:45:15,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 17:45:15,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-25 17:45:15,952 INFO L87 Difference]: Start difference. First operand 1895 states and 3644 transitions. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 2 states have internal predecessors, (71), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-25 17:45:16,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:45:16,416 INFO L93 Difference]: Finished difference Result 2386 states and 4389 transitions. [2021-11-25 17:45:16,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 17:45:16,417 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 2 states have internal predecessors, (71), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 102 [2021-11-25 17:45:16,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:45:16,438 INFO L225 Difference]: With dead ends: 2386 [2021-11-25 17:45:16,438 INFO L226 Difference]: Without dead ends: 2137 [2021-11-25 17:45:16,441 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 102 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 17:45:16,443 INFO L933 BasicCegarLoop]: 3272 mSDtfsCounter, 3437 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3437 SdHoareTripleChecker+Valid, 3429 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 17:45:16,444 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3437 Valid, 3429 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-25 17:45:16,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2137 states. [2021-11-25 17:45:16,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2137 to 2131. [2021-11-25 17:45:16,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2131 states, 2033 states have (on average 1.8932611903590753) internal successors, (3849), 2038 states have internal predecessors, (3849), 72 states have call successors, (72), 25 states have call predecessors, (72), 24 states have return successors, (70), 68 states have call predecessors, (70), 70 states have call successors, (70) [2021-11-25 17:45:16,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2131 states to 2131 states and 3991 transitions. [2021-11-25 17:45:16,551 INFO L78 Accepts]: Start accepts. Automaton has 2131 states and 3991 transitions. Word has length 102 [2021-11-25 17:45:16,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:45:16,553 INFO L470 AbstractCegarLoop]: Abstraction has 2131 states and 3991 transitions. [2021-11-25 17:45:16,553 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 2 states have internal predecessors, (71), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-25 17:45:16,553 INFO L276 IsEmpty]: Start isEmpty. Operand 2131 states and 3991 transitions. [2021-11-25 17:45:16,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-11-25 17:45:16,562 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:45:16,563 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 17:45:16,589 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1c508cd-fc13-4a53-b512-c475d34afd5c/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-25 17:45:16,767 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1c508cd-fc13-4a53-b512-c475d34afd5c/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 17:45:16,768 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 17:45:16,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:45:16,769 INFO L85 PathProgramCache]: Analyzing trace with hash 1861380167, now seen corresponding path program 1 times [2021-11-25 17:45:16,769 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:45:16,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280915250] [2021-11-25 17:45:16,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:45:16,770 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:45:16,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:45:16,860 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-25 17:45:16,861 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:45:16,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280915250] [2021-11-25 17:45:16,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280915250] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 17:45:16,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086567310] [2021-11-25 17:45:16,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:45:16,862 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 17:45:16,862 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1c508cd-fc13-4a53-b512-c475d34afd5c/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 17:45:16,863 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1c508cd-fc13-4a53-b512-c475d34afd5c/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 17:45:16,890 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1c508cd-fc13-4a53-b512-c475d34afd5c/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-25 17:45:17,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:45:17,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 703 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-25 17:45:17,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:45:17,305 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-25 17:45:17,305 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 17:45:17,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2086567310] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:45:17,306 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 17:45:17,306 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2021-11-25 17:45:17,306 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433192093] [2021-11-25 17:45:17,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:45:17,307 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 17:45:17,307 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:45:17,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 17:45:17,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-25 17:45:17,308 INFO L87 Difference]: Start difference. First operand 2131 states and 3991 transitions. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 2 states have internal predecessors, (62), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-25 17:45:17,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:45:17,769 INFO L93 Difference]: Finished difference Result 3088 states and 5438 transitions. [2021-11-25 17:45:17,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 17:45:17,770 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 2 states have internal predecessors, (62), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 102 [2021-11-25 17:45:17,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:45:17,789 INFO L225 Difference]: With dead ends: 3088 [2021-11-25 17:45:17,789 INFO L226 Difference]: Without dead ends: 2603 [2021-11-25 17:45:17,792 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 102 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 17:45:17,793 INFO L933 BasicCegarLoop]: 3260 mSDtfsCounter, 3446 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3446 SdHoareTripleChecker+Valid, 3417 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 17:45:17,794 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3446 Valid, 3417 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 286 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-25 17:45:17,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2603 states. [2021-11-25 17:45:17,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2603 to 2595. [2021-11-25 17:45:17,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2595 states, 2411 states have (on average 1.8262131895479055) internal successors, (4403), 2418 states have internal predecessors, (4403), 134 states have call successors, (134), 49 states have call predecessors, (134), 48 states have return successors, (132), 128 states have call predecessors, (132), 132 states have call successors, (132) [2021-11-25 17:45:17,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2595 states to 2595 states and 4669 transitions. [2021-11-25 17:45:17,909 INFO L78 Accepts]: Start accepts. Automaton has 2595 states and 4669 transitions. Word has length 102 [2021-11-25 17:45:17,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:45:17,912 INFO L470 AbstractCegarLoop]: Abstraction has 2595 states and 4669 transitions. [2021-11-25 17:45:17,913 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 2 states have internal predecessors, (62), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-25 17:45:17,913 INFO L276 IsEmpty]: Start isEmpty. Operand 2595 states and 4669 transitions. [2021-11-25 17:45:17,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-11-25 17:45:17,919 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:45:17,919 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 17:45:17,959 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1c508cd-fc13-4a53-b512-c475d34afd5c/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-25 17:45:18,143 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1c508cd-fc13-4a53-b512-c475d34afd5c/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 17:45:18,143 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 17:45:18,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:45:18,144 INFO L85 PathProgramCache]: Analyzing trace with hash -1752243447, now seen corresponding path program 1 times [2021-11-25 17:45:18,144 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:45:18,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102603541] [2021-11-25 17:45:18,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:45:18,145 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:45:18,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:45:18,249 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-25 17:45:18,250 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:45:18,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102603541] [2021-11-25 17:45:18,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102603541] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 17:45:18,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453392842] [2021-11-25 17:45:18,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:45:18,256 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 17:45:18,256 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1c508cd-fc13-4a53-b512-c475d34afd5c/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 17:45:18,260 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1c508cd-fc13-4a53-b512-c475d34afd5c/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 17:45:18,267 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1c508cd-fc13-4a53-b512-c475d34afd5c/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-25 17:45:18,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:45:18,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 697 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-25 17:45:18,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:45:18,663 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-25 17:45:18,663 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 17:45:18,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [453392842] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:45:18,664 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 17:45:18,664 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2021-11-25 17:45:18,664 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242963156] [2021-11-25 17:45:18,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:45:18,665 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 17:45:18,666 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:45:18,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 17:45:18,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-25 17:45:18,667 INFO L87 Difference]: Start difference. First operand 2595 states and 4669 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 2 states have internal predecessors, (65), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-25 17:45:19,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:45:19,152 INFO L93 Difference]: Finished difference Result 4468 states and 7486 transitions. [2021-11-25 17:45:19,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 17:45:19,153 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 2 states have internal predecessors, (65), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 102 [2021-11-25 17:45:19,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:45:19,177 INFO L225 Difference]: With dead ends: 4468 [2021-11-25 17:45:19,177 INFO L226 Difference]: Without dead ends: 3519 [2021-11-25 17:45:19,182 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 102 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 17:45:19,183 INFO L933 BasicCegarLoop]: 3270 mSDtfsCounter, 3443 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3443 SdHoareTripleChecker+Valid, 3427 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 17:45:19,184 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3443 Valid, 3427 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-25 17:45:19,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3519 states. [2021-11-25 17:45:19,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3519 to 3507. [2021-11-25 17:45:19,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3507 states, 3155 states have (on average 1.7391442155309034) internal successors, (5487), 3166 states have internal predecessors, (5487), 254 states have call successors, (254), 97 states have call predecessors, (254), 96 states have return successors, (252), 244 states have call predecessors, (252), 252 states have call successors, (252) [2021-11-25 17:45:19,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3507 states to 3507 states and 5993 transitions. [2021-11-25 17:45:19,424 INFO L78 Accepts]: Start accepts. Automaton has 3507 states and 5993 transitions. Word has length 102 [2021-11-25 17:45:19,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:45:19,424 INFO L470 AbstractCegarLoop]: Abstraction has 3507 states and 5993 transitions. [2021-11-25 17:45:19,425 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 2 states have internal predecessors, (65), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-25 17:45:19,425 INFO L276 IsEmpty]: Start isEmpty. Operand 3507 states and 5993 transitions. [2021-11-25 17:45:19,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-11-25 17:45:19,431 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:45:19,432 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 17:45:19,469 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1c508cd-fc13-4a53-b512-c475d34afd5c/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-25 17:45:19,655 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1c508cd-fc13-4a53-b512-c475d34afd5c/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 17:45:19,656 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 17:45:19,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:45:19,656 INFO L85 PathProgramCache]: Analyzing trace with hash 957886343, now seen corresponding path program 1 times [2021-11-25 17:45:19,657 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:45:19,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873715111] [2021-11-25 17:45:19,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:45:19,657 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:45:19,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:45:19,781 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-25 17:45:19,781 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:45:19,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873715111] [2021-11-25 17:45:19,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873715111] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 17:45:19,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636591201] [2021-11-25 17:45:19,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:45:19,783 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 17:45:19,783 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1c508cd-fc13-4a53-b512-c475d34afd5c/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 17:45:19,784 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1c508cd-fc13-4a53-b512-c475d34afd5c/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 17:45:19,799 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1c508cd-fc13-4a53-b512-c475d34afd5c/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-25 17:45:19,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:45:19,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 691 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-25 17:45:19,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:45:20,148 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-25 17:45:20,148 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 17:45:20,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1636591201] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:45:20,149 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 17:45:20,149 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2021-11-25 17:45:20,149 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059299803] [2021-11-25 17:45:20,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:45:20,150 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 17:45:20,150 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:45:20,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 17:45:20,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-25 17:45:20,151 INFO L87 Difference]: Start difference. First operand 3507 states and 5993 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 2 states have internal predecessors, (77), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-25 17:45:20,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:45:20,717 INFO L93 Difference]: Finished difference Result 7180 states and 11482 transitions. [2021-11-25 17:45:20,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 17:45:20,718 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 2 states have internal predecessors, (77), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 102 [2021-11-25 17:45:20,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:45:20,754 INFO L225 Difference]: With dead ends: 7180 [2021-11-25 17:45:20,754 INFO L226 Difference]: Without dead ends: 5319 [2021-11-25 17:45:20,763 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 102 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 17:45:20,764 INFO L933 BasicCegarLoop]: 3237 mSDtfsCounter, 3431 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3431 SdHoareTripleChecker+Valid, 3394 SdHoareTripleChecker+Invalid, 287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 17:45:20,764 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3431 Valid, 3394 Invalid, 287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 285 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-25 17:45:20,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5319 states. [2021-11-25 17:45:20,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5319 to 5299. [2021-11-25 17:45:20,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5299 states, 4619 states have (on average 1.6468932669408962) internal successors, (7607), 4638 states have internal predecessors, (7607), 486 states have call successors, (486), 193 states have call predecessors, (486), 192 states have return successors, (484), 468 states have call predecessors, (484), 484 states have call successors, (484) [2021-11-25 17:45:20,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5299 states to 5299 states and 8577 transitions. [2021-11-25 17:45:20,991 INFO L78 Accepts]: Start accepts. Automaton has 5299 states and 8577 transitions. Word has length 102 [2021-11-25 17:45:20,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:45:20,992 INFO L470 AbstractCegarLoop]: Abstraction has 5299 states and 8577 transitions. [2021-11-25 17:45:20,992 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 2 states have internal predecessors, (77), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-25 17:45:20,993 INFO L276 IsEmpty]: Start isEmpty. Operand 5299 states and 8577 transitions. [2021-11-25 17:45:21,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-11-25 17:45:21,002 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:45:21,003 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 17:45:21,043 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1c508cd-fc13-4a53-b512-c475d34afd5c/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-25 17:45:21,227 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1c508cd-fc13-4a53-b512-c475d34afd5c/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 17:45:21,228 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 17:45:21,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:45:21,228 INFO L85 PathProgramCache]: Analyzing trace with hash 1556203781, now seen corresponding path program 1 times [2021-11-25 17:45:21,228 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:45:21,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332386685] [2021-11-25 17:45:21,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:45:21,229 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:45:21,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:45:21,297 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-25 17:45:21,297 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:45:21,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332386685] [2021-11-25 17:45:21,297 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332386685] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:45:21,298 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:45:21,298 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 17:45:21,298 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858574412] [2021-11-25 17:45:21,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:45:21,299 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 17:45:21,299 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:45:21,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 17:45:21,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 17:45:21,300 INFO L87 Difference]: Start difference. First operand 5299 states and 8577 transitions. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-25 17:45:21,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:45:21,915 INFO L93 Difference]: Finished difference Result 8151 states and 12868 transitions. [2021-11-25 17:45:21,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 17:45:21,916 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 102 [2021-11-25 17:45:21,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:45:21,961 INFO L225 Difference]: With dead ends: 8151 [2021-11-25 17:45:21,961 INFO L226 Difference]: Without dead ends: 6259 [2021-11-25 17:45:21,970 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 17:45:21,971 INFO L933 BasicCegarLoop]: 3307 mSDtfsCounter, 82 mSDsluCounter, 3471 mSDsCounter, 0 mSdLazyCounter, 514 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 6536 SdHoareTripleChecker+Invalid, 514 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 514 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 17:45:21,971 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 6536 Invalid, 514 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 514 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-25 17:45:21,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6259 states. [2021-11-25 17:45:22,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6259 to 5939. [2021-11-25 17:45:22,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5939 states, 5227 states have (on average 1.6542950066960016) internal successors, (8647), 5246 states have internal predecessors, (8647), 502 states have call successors, (502), 209 states have call predecessors, (502), 208 states have return successors, (500), 484 states have call predecessors, (500), 500 states have call successors, (500) [2021-11-25 17:45:22,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5939 states to 5939 states and 9649 transitions. [2021-11-25 17:45:22,235 INFO L78 Accepts]: Start accepts. Automaton has 5939 states and 9649 transitions. Word has length 102 [2021-11-25 17:45:22,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:45:22,236 INFO L470 AbstractCegarLoop]: Abstraction has 5939 states and 9649 transitions. [2021-11-25 17:45:22,236 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-25 17:45:22,236 INFO L276 IsEmpty]: Start isEmpty. Operand 5939 states and 9649 transitions. [2021-11-25 17:45:22,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-11-25 17:45:22,254 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:45:22,254 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 17:45:22,254 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-25 17:45:22,254 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 17:45:22,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:45:22,255 INFO L85 PathProgramCache]: Analyzing trace with hash -1856769528, now seen corresponding path program 1 times [2021-11-25 17:45:22,255 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:45:22,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356120827] [2021-11-25 17:45:22,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:45:22,256 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:45:22,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:45:22,344 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-11-25 17:45:22,345 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:45:22,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356120827] [2021-11-25 17:45:22,345 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356120827] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:45:22,345 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:45:22,351 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 17:45:22,351 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995960734] [2021-11-25 17:45:22,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:45:22,352 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 17:45:22,352 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:45:22,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 17:45:22,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 17:45:22,353 INFO L87 Difference]: Start difference. First operand 5939 states and 9649 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-25 17:45:23,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:45:23,239 INFO L93 Difference]: Finished difference Result 14380 states and 22394 transitions. [2021-11-25 17:45:23,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 17:45:23,240 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 137 [2021-11-25 17:45:23,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:45:23,314 INFO L225 Difference]: With dead ends: 14380 [2021-11-25 17:45:23,314 INFO L226 Difference]: Without dead ends: 10087 [2021-11-25 17:45:23,332 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 17:45:23,333 INFO L933 BasicCegarLoop]: 3239 mSDtfsCounter, 3435 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3435 SdHoareTripleChecker+Valid, 3396 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 17:45:23,334 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3435 Valid, 3396 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-25 17:45:23,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10087 states. [2021-11-25 17:45:23,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10087 to 10035. [2021-11-25 17:45:23,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10035 states, 8651 states have (on average 1.5839787307825686) internal successors, (13703), 8686 states have internal predecessors, (13703), 966 states have call successors, (966), 417 states have call predecessors, (966), 416 states have return successors, (964), 932 states have call predecessors, (964), 964 states have call successors, (964) [2021-11-25 17:45:23,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10035 states to 10035 states and 15633 transitions. [2021-11-25 17:45:23,866 INFO L78 Accepts]: Start accepts. Automaton has 10035 states and 15633 transitions. Word has length 137 [2021-11-25 17:45:23,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:45:23,866 INFO L470 AbstractCegarLoop]: Abstraction has 10035 states and 15633 transitions. [2021-11-25 17:45:23,867 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-25 17:45:23,868 INFO L276 IsEmpty]: Start isEmpty. Operand 10035 states and 15633 transitions. [2021-11-25 17:45:23,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-11-25 17:45:23,902 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:45:23,903 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 17:45:23,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-25 17:45:23,903 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 17:45:23,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:45:23,904 INFO L85 PathProgramCache]: Analyzing trace with hash -1823698140, now seen corresponding path program 1 times [2021-11-25 17:45:23,904 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:45:23,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087048991] [2021-11-25 17:45:23,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:45:23,905 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:45:23,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:45:24,004 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-11-25 17:45:24,005 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:45:24,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087048991] [2021-11-25 17:45:24,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087048991] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:45:24,005 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:45:24,006 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 17:45:24,006 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059935290] [2021-11-25 17:45:24,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:45:24,007 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 17:45:24,007 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:45:24,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 17:45:24,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 17:45:24,008 INFO L87 Difference]: Start difference. First operand 10035 states and 15633 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-25 17:45:24,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:45:24,994 INFO L93 Difference]: Finished difference Result 26524 states and 40314 transitions. [2021-11-25 17:45:24,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 17:45:24,995 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 137 [2021-11-25 17:45:24,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:45:25,079 INFO L225 Difference]: With dead ends: 26524 [2021-11-25 17:45:25,079 INFO L226 Difference]: Without dead ends: 18135 [2021-11-25 17:45:25,120 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 17:45:25,121 INFO L933 BasicCegarLoop]: 3239 mSDtfsCounter, 3437 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3437 SdHoareTripleChecker+Valid, 3396 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 17:45:25,121 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3437 Valid, 3396 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-25 17:45:25,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18135 states. [2021-11-25 17:45:25,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18135 to 18035. [2021-11-25 17:45:25,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18035 states, 15339 states have (on average 1.5317165395397354) internal successors, (23495), 15406 states have internal predecessors, (23495), 1862 states have call successors, (1862), 833 states have call predecessors, (1862), 832 states have return successors, (1860), 1796 states have call predecessors, (1860), 1860 states have call successors, (1860) [2021-11-25 17:45:25,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18035 states to 18035 states and 27217 transitions. [2021-11-25 17:45:25,946 INFO L78 Accepts]: Start accepts. Automaton has 18035 states and 27217 transitions. Word has length 137 [2021-11-25 17:45:25,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:45:25,948 INFO L470 AbstractCegarLoop]: Abstraction has 18035 states and 27217 transitions. [2021-11-25 17:45:25,948 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-25 17:45:25,948 INFO L276 IsEmpty]: Start isEmpty. Operand 18035 states and 27217 transitions. [2021-11-25 17:45:26,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-11-25 17:45:26,008 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:45:26,009 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 17:45:26,009 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-25 17:45:26,009 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 17:45:26,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:45:26,010 INFO L85 PathProgramCache]: Analyzing trace with hash -1754244087, now seen corresponding path program 1 times [2021-11-25 17:45:26,010 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:45:26,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897842933] [2021-11-25 17:45:26,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:45:26,011 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:45:26,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:45:26,103 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-11-25 17:45:26,104 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:45:26,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897842933] [2021-11-25 17:45:26,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897842933] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:45:26,104 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:45:26,104 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 17:45:26,105 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830942367] [2021-11-25 17:45:26,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:45:26,105 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 17:45:26,105 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:45:26,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 17:45:26,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 17:45:26,107 INFO L87 Difference]: Start difference. First operand 18035 states and 27217 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-25 17:45:27,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:45:27,578 INFO L93 Difference]: Finished difference Result 50236 states and 74970 transitions. [2021-11-25 17:45:27,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 17:45:27,579 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 137 [2021-11-25 17:45:27,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:45:27,717 INFO L225 Difference]: With dead ends: 50236 [2021-11-25 17:45:27,718 INFO L226 Difference]: Without dead ends: 33847 [2021-11-25 17:45:27,777 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 17:45:27,779 INFO L933 BasicCegarLoop]: 3260 mSDtfsCounter, 3440 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 284 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3440 SdHoareTripleChecker+Valid, 3417 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 17:45:27,780 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3440 Valid, 3417 Invalid, 286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 284 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-25 17:45:27,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33847 states. [2021-11-25 17:45:29,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33847 to 33651. [2021-11-25 17:45:29,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33651 states, 28395 states have (on average 1.4945941186828666) internal successors, (42439), 28526 states have internal predecessors, (42439), 3590 states have call successors, (3590), 1665 states have call predecessors, (3590), 1664 states have return successors, (3588), 3460 states have call predecessors, (3588), 3588 states have call successors, (3588) [2021-11-25 17:45:29,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33651 states to 33651 states and 49617 transitions. [2021-11-25 17:45:29,176 INFO L78 Accepts]: Start accepts. Automaton has 33651 states and 49617 transitions. Word has length 137 [2021-11-25 17:45:29,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:45:29,176 INFO L470 AbstractCegarLoop]: Abstraction has 33651 states and 49617 transitions. [2021-11-25 17:45:29,177 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-25 17:45:29,177 INFO L276 IsEmpty]: Start isEmpty. Operand 33651 states and 49617 transitions. [2021-11-25 17:45:29,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-11-25 17:45:29,282 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:45:29,282 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 17:45:29,282 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-25 17:45:29,282 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 17:45:29,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:45:29,283 INFO L85 PathProgramCache]: Analyzing trace with hash 1524936194, now seen corresponding path program 1 times [2021-11-25 17:45:29,283 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:45:29,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954635466] [2021-11-25 17:45:29,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:45:29,284 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:45:29,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:45:29,412 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 10 proven. 49 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-11-25 17:45:29,412 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:45:29,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954635466] [2021-11-25 17:45:29,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954635466] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 17:45:29,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979740253] [2021-11-25 17:45:29,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:45:29,413 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 17:45:29,414 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1c508cd-fc13-4a53-b512-c475d34afd5c/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 17:45:29,414 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1c508cd-fc13-4a53-b512-c475d34afd5c/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 17:45:29,438 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1c508cd-fc13-4a53-b512-c475d34afd5c/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-25 17:45:29,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:45:29,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 915 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 17:45:29,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:45:29,859 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 87 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-25 17:45:29,859 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 17:45:29,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [979740253] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:45:29,860 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 17:45:29,860 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-11-25 17:45:29,860 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390783931] [2021-11-25 17:45:29,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:45:29,861 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 17:45:29,861 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:45:29,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 17:45:29,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-25 17:45:29,862 INFO L87 Difference]: Start difference. First operand 33651 states and 49617 transitions. Second operand has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-25 17:45:31,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:45:31,731 INFO L93 Difference]: Finished difference Result 50171 states and 74711 transitions. [2021-11-25 17:45:31,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 17:45:31,731 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 157 [2021-11-25 17:45:31,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:45:31,860 INFO L225 Difference]: With dead ends: 50171 [2021-11-25 17:45:31,860 INFO L226 Difference]: Without dead ends: 33783 [2021-11-25 17:45:31,902 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 159 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 17:45:31,902 INFO L933 BasicCegarLoop]: 3353 mSDtfsCounter, 164 mSDsluCounter, 3458 mSDsCounter, 0 mSdLazyCounter, 523 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 6568 SdHoareTripleChecker+Invalid, 525 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 523 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-25 17:45:31,904 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 6568 Invalid, 525 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 523 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-25 17:45:31,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33783 states. [2021-11-25 17:45:33,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33783 to 33523. [2021-11-25 17:45:33,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33523 states, 28267 states have (on average 1.4787207698022429) internal successors, (41799), 28398 states have internal predecessors, (41799), 3590 states have call successors, (3590), 1665 states have call predecessors, (3590), 1664 states have return successors, (3588), 3460 states have call predecessors, (3588), 3588 states have call successors, (3588) [2021-11-25 17:45:33,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33523 states to 33523 states and 48977 transitions. [2021-11-25 17:45:33,397 INFO L78 Accepts]: Start accepts. Automaton has 33523 states and 48977 transitions. Word has length 157 [2021-11-25 17:45:33,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:45:33,398 INFO L470 AbstractCegarLoop]: Abstraction has 33523 states and 48977 transitions. [2021-11-25 17:45:33,398 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-25 17:45:33,399 INFO L276 IsEmpty]: Start isEmpty. Operand 33523 states and 48977 transitions. [2021-11-25 17:45:33,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-11-25 17:45:33,467 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:45:33,467 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 17:45:33,508 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1c508cd-fc13-4a53-b512-c475d34afd5c/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-25 17:45:33,696 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1c508cd-fc13-4a53-b512-c475d34afd5c/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-25 17:45:33,696 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 17:45:33,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:45:33,696 INFO L85 PathProgramCache]: Analyzing trace with hash 1021870656, now seen corresponding path program 1 times [2021-11-25 17:45:33,696 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:45:33,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593239955] [2021-11-25 17:45:33,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:45:33,697 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:45:33,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:45:33,790 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 10 proven. 47 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-11-25 17:45:33,790 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:45:33,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593239955] [2021-11-25 17:45:33,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593239955] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 17:45:33,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695783712] [2021-11-25 17:45:33,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:45:33,791 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 17:45:33,791 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1c508cd-fc13-4a53-b512-c475d34afd5c/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 17:45:33,792 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1c508cd-fc13-4a53-b512-c475d34afd5c/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 17:45:33,811 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1c508cd-fc13-4a53-b512-c475d34afd5c/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-25 17:45:33,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:45:33,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 921 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-25 17:45:33,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:45:34,272 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 77 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-25 17:45:34,272 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 17:45:34,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1695783712] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:45:34,272 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 17:45:34,273 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-11-25 17:45:34,275 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648887226] [2021-11-25 17:45:34,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:45:34,276 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 17:45:34,276 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:45:34,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 17:45:34,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-25 17:45:34,277 INFO L87 Difference]: Start difference. First operand 33523 states and 48977 transitions. Second operand has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-25 17:45:36,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:45:36,173 INFO L93 Difference]: Finished difference Result 58161 states and 83086 transitions. [2021-11-25 17:45:36,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 17:45:36,173 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 157 [2021-11-25 17:45:36,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:45:36,328 INFO L225 Difference]: With dead ends: 58161 [2021-11-25 17:45:36,328 INFO L226 Difference]: Without dead ends: 41965 [2021-11-25 17:45:36,374 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 159 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 17:45:36,374 INFO L933 BasicCegarLoop]: 3246 mSDtfsCounter, 3443 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3443 SdHoareTripleChecker+Valid, 3290 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 17:45:36,375 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3443 Valid, 3290 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-25 17:45:36,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41965 states. [2021-11-25 17:45:37,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41965 to 41965. [2021-11-25 17:45:37,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41965 states, 35945 states have (on average 1.4227569898455974) internal successors, (51141), 36076 states have internal predecessors, (51141), 3844 states have call successors, (3844), 2175 states have call predecessors, (3844), 2174 states have return successors, (3842), 3714 states have call predecessors, (3842), 3842 states have call successors, (3842) [2021-11-25 17:45:38,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41965 states to 41965 states and 58827 transitions. [2021-11-25 17:45:38,060 INFO L78 Accepts]: Start accepts. Automaton has 41965 states and 58827 transitions. Word has length 157 [2021-11-25 17:45:38,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:45:38,061 INFO L470 AbstractCegarLoop]: Abstraction has 41965 states and 58827 transitions. [2021-11-25 17:45:38,062 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-25 17:45:38,062 INFO L276 IsEmpty]: Start isEmpty. Operand 41965 states and 58827 transitions. [2021-11-25 17:45:38,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2021-11-25 17:45:38,159 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:45:38,160 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 17:45:38,197 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1c508cd-fc13-4a53-b512-c475d34afd5c/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-25 17:45:38,387 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1c508cd-fc13-4a53-b512-c475d34afd5c/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 17:45:38,388 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 17:45:38,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:45:38,388 INFO L85 PathProgramCache]: Analyzing trace with hash 488397173, now seen corresponding path program 1 times [2021-11-25 17:45:38,389 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:45:38,389 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933987813] [2021-11-25 17:45:38,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:45:38,389 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:45:38,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:45:38,522 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 10 proven. 48 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-11-25 17:45:38,523 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:45:38,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933987813] [2021-11-25 17:45:38,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933987813] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 17:45:38,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282132287] [2021-11-25 17:45:38,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:45:38,524 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 17:45:38,524 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1c508cd-fc13-4a53-b512-c475d34afd5c/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 17:45:38,525 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1c508cd-fc13-4a53-b512-c475d34afd5c/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 17:45:38,543 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1c508cd-fc13-4a53-b512-c475d34afd5c/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-25 17:45:38,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:45:38,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 920 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-25 17:45:38,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:45:39,042 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 97 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-25 17:45:39,042 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 17:45:39,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [282132287] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:45:39,042 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 17:45:39,043 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2021-11-25 17:45:39,043 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737169180] [2021-11-25 17:45:39,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:45:39,044 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 17:45:39,044 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:45:39,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 17:45:39,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-25 17:45:39,045 INFO L87 Difference]: Start difference. First operand 41965 states and 58827 transitions. Second operand has 4 states, 4 states have (on average 31.75) internal successors, (127), 4 states have internal predecessors, (127), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-25 17:45:42,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:45:42,137 INFO L93 Difference]: Finished difference Result 124387 states and 172223 transitions. [2021-11-25 17:45:42,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 17:45:42,138 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 31.75) internal successors, (127), 4 states have internal predecessors, (127), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) Word has length 158 [2021-11-25 17:45:42,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:45:42,565 INFO L225 Difference]: With dead ends: 124387 [2021-11-25 17:45:42,566 INFO L226 Difference]: Without dead ends: 84069 [2021-11-25 17:45:42,673 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 160 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 17:45:42,673 INFO L933 BasicCegarLoop]: 3408 mSDtfsCounter, 3465 mSDsluCounter, 3835 mSDsCounter, 0 mSdLazyCounter, 596 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3465 SdHoareTripleChecker+Valid, 6945 SdHoareTripleChecker+Invalid, 599 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 596 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-25 17:45:42,674 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3465 Valid, 6945 Invalid, 599 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 596 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-25 17:45:42,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84069 states. [2021-11-25 17:45:45,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84069 to 83937. [2021-11-25 17:45:45,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83937 states, 71909 states have (on average 1.4000055625860464) internal successors, (100673), 72296 states have internal predecessors, (100673), 7552 states have call successors, (7552), 4347 states have call predecessors, (7552), 4474 states have return successors, (7934), 7294 states have call predecessors, (7934), 7550 states have call successors, (7934) [2021-11-25 17:45:46,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83937 states to 83937 states and 116159 transitions. [2021-11-25 17:45:46,324 INFO L78 Accepts]: Start accepts. Automaton has 83937 states and 116159 transitions. Word has length 158 [2021-11-25 17:45:46,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:45:46,325 INFO L470 AbstractCegarLoop]: Abstraction has 83937 states and 116159 transitions. [2021-11-25 17:45:46,326 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.75) internal successors, (127), 4 states have internal predecessors, (127), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-25 17:45:46,326 INFO L276 IsEmpty]: Start isEmpty. Operand 83937 states and 116159 transitions. [2021-11-25 17:45:46,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2021-11-25 17:45:46,512 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:45:46,513 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, 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 17:45:46,551 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1c508cd-fc13-4a53-b512-c475d34afd5c/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-25 17:45:46,727 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1c508cd-fc13-4a53-b512-c475d34afd5c/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 17:45:46,728 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 17:45:46,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:45:46,728 INFO L85 PathProgramCache]: Analyzing trace with hash -1807106776, now seen corresponding path program 1 times [2021-11-25 17:45:46,728 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:45:46,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467795030] [2021-11-25 17:45:46,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:45:46,729 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:45:46,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:45:46,830 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 10 proven. 49 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-11-25 17:45:46,830 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:45:46,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467795030] [2021-11-25 17:45:46,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467795030] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 17:45:46,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143088347] [2021-11-25 17:45:46,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:45:46,831 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 17:45:46,832 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1c508cd-fc13-4a53-b512-c475d34afd5c/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 17:45:46,832 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1c508cd-fc13-4a53-b512-c475d34afd5c/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 17:45:46,849 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1c508cd-fc13-4a53-b512-c475d34afd5c/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-25 17:45:47,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:45:47,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 917 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 17:45:47,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:45:47,280 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 80 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-25 17:45:47,281 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 17:45:47,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1143088347] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:45:47,281 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 17:45:47,281 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-11-25 17:45:47,282 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131000152] [2021-11-25 17:45:47,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:45:47,283 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 17:45:47,283 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:45:47,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 17:45:47,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-25 17:45:47,284 INFO L87 Difference]: Start difference. First operand 83937 states and 116159 transitions. Second operand has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-25 17:45:50,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:45:50,983 INFO L93 Difference]: Finished difference Result 193485 states and 271012 transitions. [2021-11-25 17:45:50,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 17:45:50,984 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 158 [2021-11-25 17:45:50,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:45:51,689 INFO L225 Difference]: With dead ends: 193485 [2021-11-25 17:45:51,690 INFO L226 Difference]: Without dead ends: 111195 [2021-11-25 17:45:51,869 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 160 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 17:45:51,870 INFO L933 BasicCegarLoop]: 3249 mSDtfsCounter, 93 mSDsluCounter, 3454 mSDsCounter, 0 mSdLazyCounter, 496 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 6463 SdHoareTripleChecker+Invalid, 498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 496 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 17:45:51,871 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 6463 Invalid, 498 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 496 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-25 17:45:51,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111195 states. [2021-11-25 17:45:55,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111195 to 92909. [2021-11-25 17:45:55,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92909 states, 80363 states have (on average 1.4280079140898174) internal successors, (114759), 80752 states have internal predecessors, (114759), 7811 states have call successors, (7811), 4606 states have call predecessors, (7811), 4733 states have return successors, (8193), 7551 states have call predecessors, (8193), 7809 states have call successors, (8193) [2021-11-25 17:45:55,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92909 states to 92909 states and 130763 transitions. [2021-11-25 17:45:55,773 INFO L78 Accepts]: Start accepts. Automaton has 92909 states and 130763 transitions. Word has length 158 [2021-11-25 17:45:55,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:45:55,774 INFO L470 AbstractCegarLoop]: Abstraction has 92909 states and 130763 transitions. [2021-11-25 17:45:55,774 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-25 17:45:55,774 INFO L276 IsEmpty]: Start isEmpty. Operand 92909 states and 130763 transitions. [2021-11-25 17:45:56,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2021-11-25 17:45:56,077 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:45:56,078 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, 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 17:45:56,119 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1c508cd-fc13-4a53-b512-c475d34afd5c/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-25 17:45:56,303 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1c508cd-fc13-4a53-b512-c475d34afd5c/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-25 17:45:56,304 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 17:45:56,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:45:56,304 INFO L85 PathProgramCache]: Analyzing trace with hash 1634739577, now seen corresponding path program 2 times [2021-11-25 17:45:56,304 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:45:56,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336360646] [2021-11-25 17:45:56,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:45:56,305 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:45:56,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:45:56,388 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2021-11-25 17:45:56,388 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:45:56,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336360646] [2021-11-25 17:45:56,388 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336360646] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 17:45:56,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093652353] [2021-11-25 17:45:56,389 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 17:45:56,389 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 17:45:56,389 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1c508cd-fc13-4a53-b512-c475d34afd5c/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 17:45:56,390 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1c508cd-fc13-4a53-b512-c475d34afd5c/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 17:45:56,411 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1c508cd-fc13-4a53-b512-c475d34afd5c/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-25 17:45:56,571 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-25 17:45:56,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 17:45:56,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 914 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-25 17:45:56,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:45:56,813 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 84 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-25 17:45:56,814 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 17:45:56,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1093652353] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:45:56,814 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 17:45:56,814 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2021-11-25 17:45:56,814 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602499147] [2021-11-25 17:45:56,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:45:56,815 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 17:45:56,815 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:45:56,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 17:45:56,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-25 17:45:56,816 INFO L87 Difference]: Start difference. First operand 92909 states and 130763 transitions. Second operand has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-25 17:46:00,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:46:00,679 INFO L93 Difference]: Finished difference Result 177327 states and 251589 transitions. [2021-11-25 17:46:00,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 17:46:00,690 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 158 [2021-11-25 17:46:00,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:46:01,138 INFO L225 Difference]: With dead ends: 177327 [2021-11-25 17:46:01,138 INFO L226 Difference]: Without dead ends: 130891 [2021-11-25 17:46:01,250 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 158 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 17:46:01,251 INFO L933 BasicCegarLoop]: 3351 mSDtfsCounter, 132 mSDsluCounter, 3471 mSDsCounter, 0 mSdLazyCounter, 520 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 6581 SdHoareTripleChecker+Invalid, 520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 520 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 17:46:01,253 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 6581 Invalid, 520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 520 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-25 17:46:01,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130891 states.