./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem03_label26.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_81d3b41f-bcac-465a-8850-e0ae37cad3d3/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81d3b41f-bcac-465a-8850-e0ae37cad3d3/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_81d3b41f-bcac-465a-8850-e0ae37cad3d3/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81d3b41f-bcac-465a-8850-e0ae37cad3d3/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem03_label26.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81d3b41f-bcac-465a-8850-e0ae37cad3d3/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_81d3b41f-bcac-465a-8850-e0ae37cad3d3/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 0887ed233b7d9ebaebc7d3592c7422f9d4fe2418c2eecfd5d225ad45a2570d74 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 19:22:25,701 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 19:22:25,704 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 19:22:25,737 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 19:22:25,738 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 19:22:25,739 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 19:22:25,741 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 19:22:25,744 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 19:22:25,746 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 19:22:25,748 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 19:22:25,749 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 19:22:25,750 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 19:22:25,751 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 19:22:25,753 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 19:22:25,754 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 19:22:25,756 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 19:22:25,757 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 19:22:25,758 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 19:22:25,761 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 19:22:25,763 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 19:22:25,765 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 19:22:25,767 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 19:22:25,768 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 19:22:25,770 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 19:22:25,773 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 19:22:25,774 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 19:22:25,774 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 19:22:25,776 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 19:22:25,776 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 19:22:25,777 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 19:22:25,779 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 19:22:25,780 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 19:22:25,782 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 19:22:25,783 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 19:22:25,785 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 19:22:25,786 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 19:22:25,787 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 19:22:25,788 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 19:22:25,788 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 19:22:25,789 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 19:22:25,790 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 19:22:25,791 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81d3b41f-bcac-465a-8850-e0ae37cad3d3/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-25 19:22:25,848 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 19:22:25,848 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 19:22:25,849 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 19:22:25,849 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 19:22:25,857 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 19:22:25,857 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 19:22:25,858 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 19:22:25,858 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 19:22:25,858 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 19:22:25,858 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 19:22:25,860 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 19:22:25,860 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 19:22:25,860 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 19:22:25,860 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 19:22:25,861 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 19:22:25,861 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 19:22:25,861 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 19:22:25,862 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 19:22:25,863 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 19:22:25,863 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 19:22:25,864 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 19:22:25,866 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 19:22:25,870 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 19:22:25,871 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 19:22:25,871 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 19:22:25,873 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 19:22:25,873 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 19:22:25,873 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 19:22:25,874 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 19:22:25,874 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 19:22:25,874 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 19:22:25,874 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 19:22:25,875 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 19:22:25,875 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 19:22:25,875 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 19:22:25,876 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 19:22:25,876 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 19:22:25,876 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 19:22:25,876 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 19:22:25,877 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 19:22:25,877 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 19:22:25,877 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_81d3b41f-bcac-465a-8850-e0ae37cad3d3/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81d3b41f-bcac-465a-8850-e0ae37cad3d3/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0887ed233b7d9ebaebc7d3592c7422f9d4fe2418c2eecfd5d225ad45a2570d74 [2021-11-25 19:22:26,167 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 19:22:26,211 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 19:22:26,214 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 19:22:26,216 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 19:22:26,218 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 19:22:26,220 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81d3b41f-bcac-465a-8850-e0ae37cad3d3/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/eca-rers2012/Problem03_label26.c [2021-11-25 19:22:26,315 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81d3b41f-bcac-465a-8850-e0ae37cad3d3/bin/utaipan-eEHZpOm5b7/data/8f22dc76a/3074e3e71bdf49c19144a515860e2215/FLAG151ea338a [2021-11-25 19:22:27,050 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 19:22:27,051 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81d3b41f-bcac-465a-8850-e0ae37cad3d3/sv-benchmarks/c/eca-rers2012/Problem03_label26.c [2021-11-25 19:22:27,080 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81d3b41f-bcac-465a-8850-e0ae37cad3d3/bin/utaipan-eEHZpOm5b7/data/8f22dc76a/3074e3e71bdf49c19144a515860e2215/FLAG151ea338a [2021-11-25 19:22:27,165 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81d3b41f-bcac-465a-8850-e0ae37cad3d3/bin/utaipan-eEHZpOm5b7/data/8f22dc76a/3074e3e71bdf49c19144a515860e2215 [2021-11-25 19:22:27,168 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 19:22:27,170 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 19:22:27,177 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 19:22:27,177 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 19:22:27,182 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 19:22:27,183 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 07:22:27" (1/1) ... [2021-11-25 19:22:27,185 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@49e94711 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:22:27, skipping insertion in model container [2021-11-25 19:22:27,186 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 07:22:27" (1/1) ... [2021-11-25 19:22:27,195 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 19:22:27,310 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 19:22:27,954 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_81d3b41f-bcac-465a-8850-e0ae37cad3d3/sv-benchmarks/c/eca-rers2012/Problem03_label26.c[55276,55289] [2021-11-25 19:22:28,006 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 19:22:28,017 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 19:22:28,341 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_81d3b41f-bcac-465a-8850-e0ae37cad3d3/sv-benchmarks/c/eca-rers2012/Problem03_label26.c[55276,55289] [2021-11-25 19:22:28,359 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 19:22:28,379 INFO L208 MainTranslator]: Completed translation [2021-11-25 19:22:28,380 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:22:28 WrapperNode [2021-11-25 19:22:28,380 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 19:22:28,381 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 19:22:28,381 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 19:22:28,381 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 19:22:28,389 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:22:28" (1/1) ... [2021-11-25 19:22:28,429 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:22:28" (1/1) ... [2021-11-25 19:22:28,522 INFO L137 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1771 [2021-11-25 19:22:28,522 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 19:22:28,523 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 19:22:28,523 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 19:22:28,523 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 19:22:28,531 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:22:28" (1/1) ... [2021-11-25 19:22:28,532 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:22:28" (1/1) ... [2021-11-25 19:22:28,539 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:22:28" (1/1) ... [2021-11-25 19:22:28,539 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:22:28" (1/1) ... [2021-11-25 19:22:28,589 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:22:28" (1/1) ... [2021-11-25 19:22:28,600 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:22:28" (1/1) ... [2021-11-25 19:22:28,619 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:22:28" (1/1) ... [2021-11-25 19:22:28,639 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 19:22:28,641 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 19:22:28,641 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 19:22:28,641 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 19:22:28,642 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:22:28" (1/1) ... [2021-11-25 19:22:28,650 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 19:22:28,663 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81d3b41f-bcac-465a-8850-e0ae37cad3d3/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:22:28,675 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81d3b41f-bcac-465a-8850-e0ae37cad3d3/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 19:22:28,711 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81d3b41f-bcac-465a-8850-e0ae37cad3d3/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 19:22:28,729 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 19:22:28,730 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 19:22:28,730 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 19:22:28,730 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 19:22:28,869 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 19:22:28,871 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 19:22:30,731 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 19:22:31,012 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 19:22:31,012 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-25 19:22:31,016 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 07:22:31 BoogieIcfgContainer [2021-11-25 19:22:31,016 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 19:22:31,018 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 19:22:31,018 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 19:22:31,021 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 19:22:31,022 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 07:22:27" (1/3) ... [2021-11-25 19:22:31,023 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@969f8b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 07:22:31, skipping insertion in model container [2021-11-25 19:22:31,023 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:22:28" (2/3) ... [2021-11-25 19:22:31,023 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@969f8b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 07:22:31, skipping insertion in model container [2021-11-25 19:22:31,023 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 07:22:31" (3/3) ... [2021-11-25 19:22:31,025 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem03_label26.c [2021-11-25 19:22:31,033 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 19:22:31,033 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-25 19:22:31,099 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 19:22:31,113 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 19:22:31,113 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-25 19:22:31,141 INFO L276 IsEmpty]: Start isEmpty. Operand has 148 states, 146 states have (on average 1.9726027397260273) internal successors, (288), 147 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:22:31,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-11-25 19:22:31,172 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:22:31,172 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:22:31,173 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:22:31,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:22:31,183 INFO L85 PathProgramCache]: Analyzing trace with hash -1724866312, now seen corresponding path program 1 times [2021-11-25 19:22:31,193 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:22:31,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098389754] [2021-11-25 19:22:31,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:22:31,195 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:22:31,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:22:31,860 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 19:22:31,861 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:22:31,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098389754] [2021-11-25 19:22:31,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098389754] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:22:31,863 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:22:31,863 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 19:22:31,865 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038778685] [2021-11-25 19:22:31,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:22:31,873 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:22:31,874 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:22:31,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:22:31,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:22:31,917 INFO L87 Difference]: Start difference. First operand has 148 states, 146 states have (on average 1.9726027397260273) internal successors, (288), 147 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 2 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:22:33,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:22:33,008 INFO L93 Difference]: Finished difference Result 440 states and 860 transitions. [2021-11-25 19:22:33,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:22:33,011 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 2 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 143 [2021-11-25 19:22:33,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:22:33,025 INFO L225 Difference]: With dead ends: 440 [2021-11-25 19:22:33,026 INFO L226 Difference]: Without dead ends: 289 [2021-11-25 19:22:33,029 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 19:22:33,033 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 25 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 454 mSolverCounterSat, 172 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 626 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 172 IncrementalHoareTripleChecker+Valid, 454 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-25 19:22:33,035 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 26 Invalid, 626 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [172 Valid, 454 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-25 19:22:33,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2021-11-25 19:22:33,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 289. [2021-11-25 19:22:33,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 288 states have (on average 1.90625) internal successors, (549), 288 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:22:33,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 549 transitions. [2021-11-25 19:22:33,095 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 549 transitions. Word has length 143 [2021-11-25 19:22:33,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:22:33,096 INFO L470 AbstractCegarLoop]: Abstraction has 289 states and 549 transitions. [2021-11-25 19:22:33,097 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 2 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:22:33,097 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 549 transitions. [2021-11-25 19:22:33,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-11-25 19:22:33,104 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:22:33,104 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:22:33,104 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 19:22:33,105 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:22:33,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:22:33,106 INFO L85 PathProgramCache]: Analyzing trace with hash 1190292224, now seen corresponding path program 1 times [2021-11-25 19:22:33,106 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:22:33,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138563376] [2021-11-25 19:22:33,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:22:33,107 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:22:33,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:22:33,259 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:22:33,259 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:22:33,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138563376] [2021-11-25 19:22:33,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138563376] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:22:33,260 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:22:33,260 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 19:22:33,261 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464433456] [2021-11-25 19:22:33,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:22:33,265 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:22:33,265 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:22:33,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:22:33,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:22:33,267 INFO L87 Difference]: Start difference. First operand 289 states and 549 transitions. Second operand has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 2 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:22:34,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:22:34,051 INFO L93 Difference]: Finished difference Result 865 states and 1645 transitions. [2021-11-25 19:22:34,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:22:34,053 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 2 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 148 [2021-11-25 19:22:34,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:22:34,058 INFO L225 Difference]: With dead ends: 865 [2021-11-25 19:22:34,058 INFO L226 Difference]: Without dead ends: 577 [2021-11-25 19:22:34,060 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 19:22:34,062 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 166 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 489 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 489 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-25 19:22:34,063 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 48 Invalid, 580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 489 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-25 19:22:34,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577 states. [2021-11-25 19:22:34,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577 to 575. [2021-11-25 19:22:34,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 575 states, 574 states have (on average 1.7421602787456445) internal successors, (1000), 574 states have internal predecessors, (1000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:22:34,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 575 states to 575 states and 1000 transitions. [2021-11-25 19:22:34,098 INFO L78 Accepts]: Start accepts. Automaton has 575 states and 1000 transitions. Word has length 148 [2021-11-25 19:22:34,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:22:34,098 INFO L470 AbstractCegarLoop]: Abstraction has 575 states and 1000 transitions. [2021-11-25 19:22:34,099 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 2 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:22:34,099 INFO L276 IsEmpty]: Start isEmpty. Operand 575 states and 1000 transitions. [2021-11-25 19:22:34,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-11-25 19:22:34,104 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:22:34,105 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:22:34,105 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-25 19:22:34,105 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:22:34,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:22:34,106 INFO L85 PathProgramCache]: Analyzing trace with hash -1888117797, now seen corresponding path program 1 times [2021-11-25 19:22:34,107 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:22:34,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301311253] [2021-11-25 19:22:34,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:22:34,107 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:22:34,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:22:34,412 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:22:34,412 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:22:34,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301311253] [2021-11-25 19:22:34,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301311253] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:22:34,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096326516] [2021-11-25 19:22:34,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:22:34,415 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:22:34,415 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81d3b41f-bcac-465a-8850-e0ae37cad3d3/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:22:34,417 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81d3b41f-bcac-465a-8850-e0ae37cad3d3/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:22:34,422 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81d3b41f-bcac-465a-8850-e0ae37cad3d3/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-25 19:22:34,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:22:34,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-25 19:22:34,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:22:35,023 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-25 19:22:35,023 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:22:35,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1096326516] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:22:35,024 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 19:22:35,024 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2021-11-25 19:22:35,025 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227710760] [2021-11-25 19:22:35,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:22:35,031 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:22:35,032 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:22:35,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:22:35,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:22:35,033 INFO L87 Difference]: Start difference. First operand 575 states and 1000 transitions. Second operand has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 2 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:22:35,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:22:35,925 INFO L93 Difference]: Finished difference Result 1721 states and 2997 transitions. [2021-11-25 19:22:35,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:22:35,926 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 2 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 150 [2021-11-25 19:22:35,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:22:35,933 INFO L225 Difference]: With dead ends: 1721 [2021-11-25 19:22:35,933 INFO L226 Difference]: Without dead ends: 1147 [2021-11-25 19:22:35,935 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:22:35,937 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 34 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 512 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 598 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-25 19:22:35,937 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 67 Invalid, 598 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 512 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-25 19:22:35,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1147 states. [2021-11-25 19:22:35,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1147 to 1147. [2021-11-25 19:22:35,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1147 states, 1146 states have (on average 1.6404886561954626) internal successors, (1880), 1146 states have internal predecessors, (1880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:22:35,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1147 states to 1147 states and 1880 transitions. [2021-11-25 19:22:35,992 INFO L78 Accepts]: Start accepts. Automaton has 1147 states and 1880 transitions. Word has length 150 [2021-11-25 19:22:35,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:22:35,994 INFO L470 AbstractCegarLoop]: Abstraction has 1147 states and 1880 transitions. [2021-11-25 19:22:35,995 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 2 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:22:35,995 INFO L276 IsEmpty]: Start isEmpty. Operand 1147 states and 1880 transitions. [2021-11-25 19:22:36,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-11-25 19:22:36,006 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:22:36,007 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:22:36,045 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81d3b41f-bcac-465a-8850-e0ae37cad3d3/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-25 19:22:36,222 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81d3b41f-bcac-465a-8850-e0ae37cad3d3/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:22:36,222 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:22:36,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:22:36,223 INFO L85 PathProgramCache]: Analyzing trace with hash 1698059713, now seen corresponding path program 1 times [2021-11-25 19:22:36,223 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:22:36,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236411212] [2021-11-25 19:22:36,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:22:36,224 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:22:36,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:22:36,311 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-25 19:22:36,312 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:22:36,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236411212] [2021-11-25 19:22:36,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236411212] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:22:36,313 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:22:36,313 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 19:22:36,313 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915334090] [2021-11-25 19:22:36,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:22:36,314 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:22:36,314 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:22:36,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:22:36,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:22:36,316 INFO L87 Difference]: Start difference. First operand 1147 states and 1880 transitions. Second operand has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 2 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:22:37,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:22:37,102 INFO L93 Difference]: Finished difference Result 2865 states and 4674 transitions. [2021-11-25 19:22:37,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:22:37,103 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 2 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 160 [2021-11-25 19:22:37,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:22:37,114 INFO L225 Difference]: With dead ends: 2865 [2021-11-25 19:22:37,115 INFO L226 Difference]: Without dead ends: 1719 [2021-11-25 19:22:37,117 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 19:22:37,118 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 155 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 455 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 606 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-25 19:22:37,119 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 36 Invalid, 606 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 455 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-25 19:22:37,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1719 states. [2021-11-25 19:22:37,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1719 to 1719. [2021-11-25 19:22:37,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1719 states, 1718 states have (on average 1.5954598370197905) internal successors, (2741), 1718 states have internal predecessors, (2741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:22:37,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1719 states to 1719 states and 2741 transitions. [2021-11-25 19:22:37,216 INFO L78 Accepts]: Start accepts. Automaton has 1719 states and 2741 transitions. Word has length 160 [2021-11-25 19:22:37,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:22:37,217 INFO L470 AbstractCegarLoop]: Abstraction has 1719 states and 2741 transitions. [2021-11-25 19:22:37,218 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 2 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:22:37,218 INFO L276 IsEmpty]: Start isEmpty. Operand 1719 states and 2741 transitions. [2021-11-25 19:22:37,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2021-11-25 19:22:37,224 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:22:37,224 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:22:37,224 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-25 19:22:37,225 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:22:37,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:22:37,226 INFO L85 PathProgramCache]: Analyzing trace with hash -801828674, now seen corresponding path program 1 times [2021-11-25 19:22:37,226 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:22:37,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082880241] [2021-11-25 19:22:37,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:22:37,228 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:22:37,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:22:37,318 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-25 19:22:37,318 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:22:37,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082880241] [2021-11-25 19:22:37,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082880241] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:22:37,319 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:22:37,319 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:22:37,319 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446648288] [2021-11-25 19:22:37,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:22:37,320 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:22:37,321 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:22:37,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:22:37,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:22:37,326 INFO L87 Difference]: Start difference. First operand 1719 states and 2741 transitions. Second operand has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:22:38,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:22:38,114 INFO L93 Difference]: Finished difference Result 5153 states and 8220 transitions. [2021-11-25 19:22:38,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:22:38,114 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 163 [2021-11-25 19:22:38,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:22:38,133 INFO L225 Difference]: With dead ends: 5153 [2021-11-25 19:22:38,134 INFO L226 Difference]: Without dead ends: 3435 [2021-11-25 19:22:38,137 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 19:22:38,138 INFO L933 BasicCegarLoop]: 259 mSDtfsCounter, 150 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 426 mSolverCounterSat, 163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 589 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 426 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-25 19:22:38,139 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 262 Invalid, 589 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [163 Valid, 426 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-25 19:22:38,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3435 states. [2021-11-25 19:22:38,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3435 to 3435. [2021-11-25 19:22:38,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3435 states, 3434 states have (on average 1.3768200349446709) internal successors, (4728), 3434 states have internal predecessors, (4728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:22:38,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3435 states to 3435 states and 4728 transitions. [2021-11-25 19:22:38,225 INFO L78 Accepts]: Start accepts. Automaton has 3435 states and 4728 transitions. Word has length 163 [2021-11-25 19:22:38,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:22:38,226 INFO L470 AbstractCegarLoop]: Abstraction has 3435 states and 4728 transitions. [2021-11-25 19:22:38,226 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:22:38,226 INFO L276 IsEmpty]: Start isEmpty. Operand 3435 states and 4728 transitions. [2021-11-25 19:22:38,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2021-11-25 19:22:38,234 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:22:38,234 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:22:38,234 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-25 19:22:38,234 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:22:38,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:22:38,235 INFO L85 PathProgramCache]: Analyzing trace with hash -1619860097, now seen corresponding path program 1 times [2021-11-25 19:22:38,235 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:22:38,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502938740] [2021-11-25 19:22:38,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:22:38,236 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:22:38,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:22:38,311 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:22:38,311 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:22:38,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502938740] [2021-11-25 19:22:38,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502938740] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:22:38,312 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:22:38,312 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:22:38,313 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946375650] [2021-11-25 19:22:38,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:22:38,313 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:22:38,313 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:22:38,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:22:38,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:22:38,314 INFO L87 Difference]: Start difference. First operand 3435 states and 4728 transitions. Second operand has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:22:39,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:22:39,152 INFO L93 Difference]: Finished difference Result 10158 states and 14019 transitions. [2021-11-25 19:22:39,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:22:39,153 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 168 [2021-11-25 19:22:39,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:22:39,189 INFO L225 Difference]: With dead ends: 10158 [2021-11-25 19:22:39,189 INFO L226 Difference]: Without dead ends: 6724 [2021-11-25 19:22:39,194 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 19:22:39,195 INFO L933 BasicCegarLoop]: 73 mSDtfsCounter, 150 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 508 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 592 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 508 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-25 19:22:39,196 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 76 Invalid, 592 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 508 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-25 19:22:39,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6724 states. [2021-11-25 19:22:39,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6724 to 6724. [2021-11-25 19:22:39,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6724 states, 6723 states have (on average 1.3263424066636917) internal successors, (8917), 6723 states have internal predecessors, (8917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:22:39,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6724 states to 6724 states and 8917 transitions. [2021-11-25 19:22:39,376 INFO L78 Accepts]: Start accepts. Automaton has 6724 states and 8917 transitions. Word has length 168 [2021-11-25 19:22:39,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:22:39,377 INFO L470 AbstractCegarLoop]: Abstraction has 6724 states and 8917 transitions. [2021-11-25 19:22:39,377 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:22:39,377 INFO L276 IsEmpty]: Start isEmpty. Operand 6724 states and 8917 transitions. [2021-11-25 19:22:39,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2021-11-25 19:22:39,389 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:22:39,390 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:22:39,390 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-25 19:22:39,390 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:22:39,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:22:39,391 INFO L85 PathProgramCache]: Analyzing trace with hash 172360892, now seen corresponding path program 1 times [2021-11-25 19:22:39,391 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:22:39,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15502511] [2021-11-25 19:22:39,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:22:39,392 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:22:39,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:22:39,497 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 37 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:22:39,497 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:22:39,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15502511] [2021-11-25 19:22:39,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15502511] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:22:39,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528784175] [2021-11-25 19:22:39,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:22:39,500 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:22:39,501 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81d3b41f-bcac-465a-8850-e0ae37cad3d3/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:22:39,506 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81d3b41f-bcac-465a-8850-e0ae37cad3d3/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:22:39,530 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81d3b41f-bcac-465a-8850-e0ae37cad3d3/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-25 19:22:39,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:22:39,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 19:22:39,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:22:40,000 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-25 19:22:40,001 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:22:40,001 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [528784175] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:22:40,001 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 19:22:40,002 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-11-25 19:22:40,002 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926258779] [2021-11-25 19:22:40,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:22:40,003 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:22:40,003 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:22:40,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:22:40,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:22:40,004 INFO L87 Difference]: Start difference. First operand 6724 states and 8917 transitions. Second operand has 3 states, 3 states have (on average 58.666666666666664) internal successors, (176), 3 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:22:40,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:22:40,843 INFO L93 Difference]: Finished difference Result 18738 states and 24905 transitions. [2021-11-25 19:22:40,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:22:40,844 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 58.666666666666664) internal successors, (176), 3 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 181 [2021-11-25 19:22:40,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:22:40,923 INFO L225 Difference]: With dead ends: 18738 [2021-11-25 19:22:40,924 INFO L226 Difference]: Without dead ends: 12015 [2021-11-25 19:22:40,933 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:22:40,933 INFO L933 BasicCegarLoop]: 278 mSDtfsCounter, 5 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 438 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 563 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 438 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-25 19:22:40,934 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 294 Invalid, 563 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 438 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-25 19:22:40,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12015 states. [2021-11-25 19:22:41,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12015 to 12015. [2021-11-25 19:22:41,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12015 states, 12014 states have (on average 1.3030630930580989) internal successors, (15655), 12014 states have internal predecessors, (15655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:22:41,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12015 states to 12015 states and 15655 transitions. [2021-11-25 19:22:41,232 INFO L78 Accepts]: Start accepts. Automaton has 12015 states and 15655 transitions. Word has length 181 [2021-11-25 19:22:41,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:22:41,233 INFO L470 AbstractCegarLoop]: Abstraction has 12015 states and 15655 transitions. [2021-11-25 19:22:41,233 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 58.666666666666664) internal successors, (176), 3 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:22:41,233 INFO L276 IsEmpty]: Start isEmpty. Operand 12015 states and 15655 transitions. [2021-11-25 19:22:41,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2021-11-25 19:22:41,254 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:22:41,255 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:22:41,296 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81d3b41f-bcac-465a-8850-e0ae37cad3d3/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-25 19:22:41,482 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81d3b41f-bcac-465a-8850-e0ae37cad3d3/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:22:41,482 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:22:41,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:22:41,483 INFO L85 PathProgramCache]: Analyzing trace with hash 1108927299, now seen corresponding path program 1 times [2021-11-25 19:22:41,483 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:22:41,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485760038] [2021-11-25 19:22:41,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:22:41,483 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:22:41,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:22:41,584 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 53 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-25 19:22:41,584 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:22:41,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485760038] [2021-11-25 19:22:41,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485760038] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:22:41,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041803691] [2021-11-25 19:22:41,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:22:41,585 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:22:41,585 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81d3b41f-bcac-465a-8850-e0ae37cad3d3/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:22:41,586 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81d3b41f-bcac-465a-8850-e0ae37cad3d3/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:22:41,588 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81d3b41f-bcac-465a-8850-e0ae37cad3d3/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-25 19:22:41,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:22:41,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 442 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 19:22:41,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:22:42,272 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-25 19:22:42,272 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:22:42,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1041803691] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:22:42,273 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 19:22:42,273 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-11-25 19:22:42,273 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184672449] [2021-11-25 19:22:42,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:22:42,274 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:22:42,274 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:22:42,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:22:42,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-25 19:22:42,275 INFO L87 Difference]: Start difference. First operand 12015 states and 15655 transitions. Second operand has 4 states, 4 states have (on average 44.75) internal successors, (179), 3 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:22:43,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:22:43,305 INFO L93 Difference]: Finished difference Result 36043 states and 46670 transitions. [2021-11-25 19:22:43,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:22:43,306 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 44.75) internal successors, (179), 3 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 191 [2021-11-25 19:22:43,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:22:43,361 INFO L225 Difference]: With dead ends: 36043 [2021-11-25 19:22:43,361 INFO L226 Difference]: Without dead ends: 24029 [2021-11-25 19:22:43,378 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 189 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 19:22:43,379 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 543 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 625 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 543 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 741 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 625 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-25 19:22:43,379 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [543 Valid, 221 Invalid, 741 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 625 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-25 19:22:43,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24029 states. [2021-11-25 19:22:43,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24029 to 23026. [2021-11-25 19:22:43,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23026 states, 23025 states have (on average 1.2969815418023887) internal successors, (29863), 23025 states have internal predecessors, (29863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:22:43,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23026 states to 23026 states and 29863 transitions. [2021-11-25 19:22:43,897 INFO L78 Accepts]: Start accepts. Automaton has 23026 states and 29863 transitions. Word has length 191 [2021-11-25 19:22:43,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:22:43,898 INFO L470 AbstractCegarLoop]: Abstraction has 23026 states and 29863 transitions. [2021-11-25 19:22:43,898 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 44.75) internal successors, (179), 3 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:22:43,899 INFO L276 IsEmpty]: Start isEmpty. Operand 23026 states and 29863 transitions. [2021-11-25 19:22:43,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2021-11-25 19:22:43,923 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:22:43,924 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:22:43,962 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81d3b41f-bcac-465a-8850-e0ae37cad3d3/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-25 19:22:44,141 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81d3b41f-bcac-465a-8850-e0ae37cad3d3/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:22:44,142 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:22:44,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:22:44,142 INFO L85 PathProgramCache]: Analyzing trace with hash -49854660, now seen corresponding path program 1 times [2021-11-25 19:22:44,143 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:22:44,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269959441] [2021-11-25 19:22:44,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:22:44,143 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:22:44,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:22:44,249 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 47 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:22:44,249 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:22:44,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269959441] [2021-11-25 19:22:44,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269959441] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:22:44,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204485533] [2021-11-25 19:22:44,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:22:44,250 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:22:44,251 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81d3b41f-bcac-465a-8850-e0ae37cad3d3/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:22:44,252 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81d3b41f-bcac-465a-8850-e0ae37cad3d3/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:22:44,270 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81d3b41f-bcac-465a-8850-e0ae37cad3d3/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-25 19:22:44,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:22:44,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-25 19:22:44,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:22:44,758 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-25 19:22:44,759 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:22:44,759 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1204485533] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:22:44,759 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 19:22:44,759 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-11-25 19:22:44,760 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303411283] [2021-11-25 19:22:44,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:22:44,760 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:22:44,761 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:22:44,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:22:44,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:22:44,762 INFO L87 Difference]: Start difference. First operand 23026 states and 29863 transitions. Second operand has 3 states, 3 states have (on average 62.0) internal successors, (186), 3 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:22:45,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:22:45,748 INFO L93 Difference]: Finished difference Result 53487 states and 70636 transitions. [2021-11-25 19:22:45,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:22:45,749 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 62.0) internal successors, (186), 3 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 191 [2021-11-25 19:22:45,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:22:45,812 INFO L225 Difference]: With dead ends: 53487 [2021-11-25 19:22:45,812 INFO L226 Difference]: Without dead ends: 30462 [2021-11-25 19:22:45,838 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:22:45,841 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 47 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 493 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 589 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 493 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-25 19:22:45,841 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 23 Invalid, 589 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 493 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-25 19:22:45,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30462 states. [2021-11-25 19:22:46,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30462 to 30462. [2021-11-25 19:22:46,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30462 states, 30461 states have (on average 1.3321296083516627) internal successors, (40578), 30461 states have internal predecessors, (40578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:22:46,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30462 states to 30462 states and 40578 transitions. [2021-11-25 19:22:46,529 INFO L78 Accepts]: Start accepts. Automaton has 30462 states and 40578 transitions. Word has length 191 [2021-11-25 19:22:46,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:22:46,530 INFO L470 AbstractCegarLoop]: Abstraction has 30462 states and 40578 transitions. [2021-11-25 19:22:46,530 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 62.0) internal successors, (186), 3 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:22:46,530 INFO L276 IsEmpty]: Start isEmpty. Operand 30462 states and 40578 transitions. [2021-11-25 19:22:46,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2021-11-25 19:22:46,556 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:22:46,556 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:22:46,596 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81d3b41f-bcac-465a-8850-e0ae37cad3d3/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-25 19:22:46,778 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81d3b41f-bcac-465a-8850-e0ae37cad3d3/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:22:46,779 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:22:46,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:22:46,779 INFO L85 PathProgramCache]: Analyzing trace with hash -1836560088, now seen corresponding path program 1 times [2021-11-25 19:22:46,779 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:22:46,779 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064221053] [2021-11-25 19:22:46,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:22:46,780 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:22:46,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:22:46,921 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 56 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-25 19:22:46,921 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:22:46,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064221053] [2021-11-25 19:22:46,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064221053] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:22:46,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876731681] [2021-11-25 19:22:46,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:22:46,923 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:22:46,923 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81d3b41f-bcac-465a-8850-e0ae37cad3d3/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:22:46,924 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81d3b41f-bcac-465a-8850-e0ae37cad3d3/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:22:46,944 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81d3b41f-bcac-465a-8850-e0ae37cad3d3/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-25 19:22:47,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:22:47,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 453 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 19:22:47,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:22:47,692 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 56 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-25 19:22:47,693 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:22:48,028 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 56 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-25 19:22:48,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [876731681] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:22:48,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1526387151] [2021-11-25 19:22:48,065 INFO L159 IcfgInterpreter]: Started Sifa with 145 locations of interest [2021-11-25 19:22:48,065 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:22:48,145 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:22:48,150 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:22:48,151 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:31:47,272 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 14 [2021-11-25 19:31:48,236 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 87424 conjuctions. This might take some time... [2021-11-25 19:32:25,205 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 1472 conjuctions. [2021-11-25 19:32:25,280 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 14 [2021-11-25 19:32:25,907 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 87424 conjuctions. This might take some time... [2021-11-25 19:33:00,721 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 1472 conjuctions. [2021-11-25 19:33:04,082 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 14 [2021-11-25 19:33:04,803 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 87424 conjuctions. This might take some time... [2021-11-25 19:33:36,632 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 1472 conjuctions. [2021-11-25 19:35:22,032 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:36:01,008 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '215263#(and (<= 26 ~z~0) (<= 5 ~e~0) (<= 25 ~y~0) (<= ~a0~0 1) (<= ~a7~0 0) (<= ~c~0 3) (<= ~e~0 5) (<= 6 ~f~0) (<= 0 |#NULL.base|) (<= ~a1~0 1) (<= ~w~0 23) (<= ~u~0 21) (<= 1 ~a1~0) (<= 1 ~a16~0) (<= |ULTIMATE.start_calculate_output_~input#1| 6) (<= ~a10~0 1) (<= 1 |ULTIMATE.start_calculate_output_~input#1|) (<= |ULTIMATE.start_main_~input~0#1| 6) (<= ~a20~0 0) (<= ~a27~0 1) (<= 0 ~a7~0) (<= ~a9~0 1) (<= ~a4~0 1) (<= 0 ~a17~0) (<= 0 ~a23~0) (<= 0 ~a20~0) (<= ~a13~0 1) (<= 0 ~a14~0) (<= ~x~0 24) (<= ~b~0 2) (<= ~a2~0 0) (<= 1 ~a22~0) (<= 1 ~a4~0) (<= ~a21~0 1) (<= 3 ~c~0) (<= 1 ~a24~0) (<= ~a3~0 0) (<= 1 ~a0~0) (<= ~a28~0 1) (<= |ULTIMATE.start_calculate_output_#in~input#1| 6) (<= ~a18~0 1) (<= 1 ~a21~0) (<= 0 ~a19~0) (<= |#NULL.offset| 0) (<= ~v~0 22) (<= ~a15~0 1) (<= ~a22~0 1) (<= 1 |ULTIMATE.start_main_~input~0#1|) (<= 1 ~a5~0) (<= 1 ~a12~0) (<= ~a5~0 1) (<= ~a~0 1) (<= 4 ~d~0) (<= 0 ~a11~0) (<= 23 ~w~0) (<= ~a17~0 0) (<= ~a23~0 0) (<= ~a24~0 1) (<= ~z~0 26) (<= 21 ~u~0) (<= 2 ~b~0) (<= 0 (+ |ULTIMATE.start_main_~output~0#1| 1)) (<= 1 ~a18~0) (<= 1 |ULTIMATE.start_calculate_output_#in~input#1|) (<= ~a12~0 1) (<= 1 ~a9~0) (<= |#NULL.base| 0) (<= ~a8~0 0) (<= ~a14~0 0) (<= 1 ~a29~0) (<= ~y~0 25) (<= 1 ~a13~0) (<= 1 ~a28~0) (<= 0 ~a6~0) (<= 1 ~a~0) (<= 22 ~v~0) (<= 1 ~a10~0) (<= 0 ~a2~0) (<= 1 ~a15~0) (<= 0 |#NULL.offset|) (<= ~d~0 4) (<= 0 |#StackHeapBarrier|) (<= ~a25~0 0) (<= ~a29~0 1) (<= 0 ~a8~0) (<= ~f~0 6) (<= 0 ~a26~0) (<= 0 ~a3~0) (<= ~a16~0 1) (<= 0 ~a25~0) (<= 24 ~x~0) (<= ~a19~0 0))' at error location [2021-11-25 19:36:01,008 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:36:01,010 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:36:01,010 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4, 4] total 6 [2021-11-25 19:36:01,011 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902596634] [2021-11-25 19:36:01,011 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:36:01,015 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 19:36:01,015 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:36:01,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 19:36:01,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-11-25 19:36:01,017 INFO L87 Difference]: Start difference. First operand 30462 states and 40578 transitions. Second operand has 6 states, 6 states have (on average 61.666666666666664) internal successors, (370), 6 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)