./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/float-newlib/float_req_bl_1251.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_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/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_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-newlib/float_req_bl_1251.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/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_f521d0fe-485b-4a7f-a253-f634f6d3d39d/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 de540e539c3db6027c1fdb04fcc6cae02aafb8aa58950d31054b2b0b8391af6d --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 19:49:46,659 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 19:49:46,664 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 19:49:46,730 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 19:49:46,731 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 19:49:46,737 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 19:49:46,739 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 19:49:46,743 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 19:49:46,746 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 19:49:46,753 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 19:49:46,755 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 19:49:46,757 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 19:49:46,758 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 19:49:46,761 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 19:49:46,763 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 19:49:46,768 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 19:49:46,770 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 19:49:46,772 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 19:49:46,775 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 19:49:46,784 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 19:49:46,786 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 19:49:46,790 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 19:49:46,791 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 19:49:46,792 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 19:49:46,797 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 19:49:46,797 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 19:49:46,798 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 19:49:46,799 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 19:49:46,800 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 19:49:46,801 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 19:49:46,802 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 19:49:46,803 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 19:49:46,804 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 19:49:46,805 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 19:49:46,806 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 19:49:46,807 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 19:49:46,807 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 19:49:46,808 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 19:49:46,808 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 19:49:46,809 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 19:49:46,810 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 19:49:46,811 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-25 19:49:46,841 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 19:49:46,841 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 19:49:46,842 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 19:49:46,842 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 19:49:46,843 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 19:49:46,843 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 19:49:46,843 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 19:49:46,844 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 19:49:46,844 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 19:49:46,844 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 19:49:46,845 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 19:49:46,845 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 19:49:46,845 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 19:49:46,845 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 19:49:46,846 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 19:49:46,846 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 19:49:46,846 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 19:49:46,847 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 19:49:46,848 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 19:49:46,848 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 19:49:46,848 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 19:49:46,848 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 19:49:46,849 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 19:49:46,849 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 19:49:46,849 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 19:49:46,849 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 19:49:46,850 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 19:49:46,850 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 19:49:46,850 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 19:49:46,851 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 19:49:46,851 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 19:49:46,851 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 19:49:46,851 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 19:49:46,852 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 19:49:46,852 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 19:49:46,852 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 19:49:46,853 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 19:49:46,853 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 19:49:46,853 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 19:49:46,854 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 19:49:46,854 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 19:49:46,854 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_f521d0fe-485b-4a7f-a253-f634f6d3d39d/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> de540e539c3db6027c1fdb04fcc6cae02aafb8aa58950d31054b2b0b8391af6d [2021-11-25 19:49:47,185 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 19:49:47,226 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 19:49:47,229 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 19:49:47,231 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 19:49:47,232 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 19:49:47,234 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/float-newlib/float_req_bl_1251.c [2021-11-25 19:49:47,334 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/data/5703304ea/051fac31906a4532a9c056f09118f0a6/FLAGf97bf3f47 [2021-11-25 19:49:47,930 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 19:49:47,931 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/sv-benchmarks/c/float-newlib/float_req_bl_1251.c [2021-11-25 19:49:47,950 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/data/5703304ea/051fac31906a4532a9c056f09118f0a6/FLAGf97bf3f47 [2021-11-25 19:49:48,287 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/data/5703304ea/051fac31906a4532a9c056f09118f0a6 [2021-11-25 19:49:48,291 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 19:49:48,294 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 19:49:48,300 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 19:49:48,300 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 19:49:48,305 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 19:49:48,307 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 07:49:48" (1/1) ... [2021-11-25 19:49:48,308 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@338d22da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:49:48, skipping insertion in model container [2021-11-25 19:49:48,309 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 07:49:48" (1/1) ... [2021-11-25 19:49:48,319 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 19:49:48,343 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 19:49:48,688 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_f521d0fe-485b-4a7f-a253-f634f6d3d39d/sv-benchmarks/c/float-newlib/float_req_bl_1251.c[1980,1993] [2021-11-25 19:49:48,701 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_f521d0fe-485b-4a7f-a253-f634f6d3d39d/sv-benchmarks/c/float-newlib/float_req_bl_1251.c[2139,2152] [2021-11-25 19:49:48,703 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 19:49:48,716 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 19:49:48,766 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_f521d0fe-485b-4a7f-a253-f634f6d3d39d/sv-benchmarks/c/float-newlib/float_req_bl_1251.c[1980,1993] [2021-11-25 19:49:48,770 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_f521d0fe-485b-4a7f-a253-f634f6d3d39d/sv-benchmarks/c/float-newlib/float_req_bl_1251.c[2139,2152] [2021-11-25 19:49:48,773 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 19:49:48,792 INFO L208 MainTranslator]: Completed translation [2021-11-25 19:49:48,792 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:49:48 WrapperNode [2021-11-25 19:49:48,793 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 19:49:48,794 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 19:49:48,794 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 19:49:48,794 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 19:49:48,804 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:49:48" (1/1) ... [2021-11-25 19:49:48,826 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:49:48" (1/1) ... [2021-11-25 19:49:48,867 INFO L137 Inliner]: procedures = 18, calls = 22, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 107 [2021-11-25 19:49:48,867 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 19:49:48,869 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 19:49:48,870 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 19:49:48,870 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 19:49:48,881 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:49:48" (1/1) ... [2021-11-25 19:49:48,881 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:49:48" (1/1) ... [2021-11-25 19:49:48,897 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:49:48" (1/1) ... [2021-11-25 19:49:48,897 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:49:48" (1/1) ... [2021-11-25 19:49:48,906 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:49:48" (1/1) ... [2021-11-25 19:49:48,924 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:49:48" (1/1) ... [2021-11-25 19:49:48,926 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:49:48" (1/1) ... [2021-11-25 19:49:48,935 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 19:49:48,937 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 19:49:48,937 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 19:49:48,937 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 19:49:48,938 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:49:48" (1/1) ... [2021-11-25 19:49:48,951 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 19:49:48,965 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:49:48,978 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 19:49:48,997 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 19:49:49,040 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 19:49:49,041 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 19:49:49,041 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-25 19:49:49,041 INFO L130 BoogieDeclarations]: Found specification of procedure __fpclassify_float [2021-11-25 19:49:49,042 INFO L138 BoogieDeclarations]: Found implementation of procedure __fpclassify_float [2021-11-25 19:49:49,042 INFO L130 BoogieDeclarations]: Found specification of procedure isnan_float [2021-11-25 19:49:49,043 INFO L138 BoogieDeclarations]: Found implementation of procedure isnan_float [2021-11-25 19:49:49,043 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2021-11-25 19:49:49,043 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 19:49:49,043 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 19:49:49,044 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-25 19:49:49,044 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-25 19:49:49,173 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 19:49:49,175 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 19:49:49,451 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 19:49:49,576 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 19:49:49,576 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-25 19:49:49,579 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 07:49:49 BoogieIcfgContainer [2021-11-25 19:49:49,579 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 19:49:49,581 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 19:49:49,596 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 19:49:49,600 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 19:49:49,601 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 07:49:48" (1/3) ... [2021-11-25 19:49:49,602 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a8c1109 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 07:49:49, skipping insertion in model container [2021-11-25 19:49:49,602 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:49:48" (2/3) ... [2021-11-25 19:49:49,602 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a8c1109 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 07:49:49, skipping insertion in model container [2021-11-25 19:49:49,603 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 07:49:49" (3/3) ... [2021-11-25 19:49:49,604 INFO L111 eAbstractionObserver]: Analyzing ICFG float_req_bl_1251.c [2021-11-25 19:49:49,611 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 19:49:49,614 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-25 19:49:49,708 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 19:49:49,723 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 19:49:49,723 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-25 19:49:49,755 INFO L276 IsEmpty]: Start isEmpty. Operand has 47 states, 32 states have (on average 1.40625) internal successors, (45), 34 states have internal predecessors, (45), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-11-25 19:49:49,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-25 19:49:49,765 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:49:49,765 INFO L514 BasicCegarLoop]: trace histogram [2, 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 19:49:49,766 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:49:49,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:49:49,774 INFO L85 PathProgramCache]: Analyzing trace with hash -1393628457, now seen corresponding path program 1 times [2021-11-25 19:49:49,786 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:49:49,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690699374] [2021-11-25 19:49:49,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:49:49,788 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:49:49,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:49:50,119 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 19:49:50,120 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:49:50,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690699374] [2021-11-25 19:49:50,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690699374] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:49:50,122 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:49:50,122 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 19:49:50,124 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105117099] [2021-11-25 19:49:50,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:49:50,133 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:49:50,135 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:49:50,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:49:50,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:49:50,182 INFO L87 Difference]: Start difference. First operand has 47 states, 32 states have (on average 1.40625) internal successors, (45), 34 states have internal predecessors, (45), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-25 19:49:50,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:49:50,336 INFO L93 Difference]: Finished difference Result 89 states and 125 transitions. [2021-11-25 19:49:50,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 19:49:50,339 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2021-11-25 19:49:50,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:49:50,350 INFO L225 Difference]: With dead ends: 89 [2021-11-25 19:49:50,350 INFO L226 Difference]: Without dead ends: 53 [2021-11-25 19:49:50,355 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 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 19:49:50,366 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 16 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:49:50,370 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 151 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:49:50,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-11-25 19:49:50,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 46. [2021-11-25 19:49:50,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 32 states have (on average 1.21875) internal successors, (39), 33 states have internal predecessors, (39), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-11-25 19:49:50,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 59 transitions. [2021-11-25 19:49:50,441 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 59 transitions. Word has length 24 [2021-11-25 19:49:50,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:49:50,442 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 59 transitions. [2021-11-25 19:49:50,442 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-25 19:49:50,443 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 59 transitions. [2021-11-25 19:49:50,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-25 19:49:50,447 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:49:50,448 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 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 19:49:50,448 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 19:49:50,449 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:49:50,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:49:50,451 INFO L85 PathProgramCache]: Analyzing trace with hash 1422555787, now seen corresponding path program 1 times [2021-11-25 19:49:50,453 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:49:50,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041232611] [2021-11-25 19:49:50,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:49:50,454 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:49:50,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:49:50,625 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 19:49:50,625 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:49:50,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041232611] [2021-11-25 19:49:50,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041232611] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:49:50,626 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:49:50,627 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:49:50,627 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070980234] [2021-11-25 19:49:50,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:49:50,629 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:49:50,629 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:49:50,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:49:50,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:49:50,631 INFO L87 Difference]: Start difference. First operand 46 states and 59 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-25 19:49:50,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:49:50,660 INFO L93 Difference]: Finished difference Result 49 states and 62 transitions. [2021-11-25 19:49:50,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:49:50,661 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 29 [2021-11-25 19:49:50,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:49:50,663 INFO L225 Difference]: With dead ends: 49 [2021-11-25 19:49:50,664 INFO L226 Difference]: Without dead ends: 47 [2021-11-25 19:49:50,664 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 19:49:50,666 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 0 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 19:49:50,667 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 99 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 19:49:50,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-11-25 19:49:50,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2021-11-25 19:49:50,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-11-25 19:49:50,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 60 transitions. [2021-11-25 19:49:50,679 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 60 transitions. Word has length 29 [2021-11-25 19:49:50,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:49:50,680 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 60 transitions. [2021-11-25 19:49:50,681 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-25 19:49:50,681 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 60 transitions. [2021-11-25 19:49:50,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-25 19:49:50,683 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:49:50,684 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 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 19:49:50,684 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-25 19:49:50,684 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:49:50,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:49:50,685 INFO L85 PathProgramCache]: Analyzing trace with hash 1278819550, now seen corresponding path program 1 times [2021-11-25 19:49:50,686 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:49:50,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654792381] [2021-11-25 19:49:50,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:49:50,687 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:49:50,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-25 19:49:50,820 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-25 19:49:50,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-25 19:49:50,949 INFO L133 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-11-25 19:49:50,956 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-11-25 19:49:50,957 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2021-11-25 19:49:50,961 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2021-11-25 19:49:50,961 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-25 19:49:50,968 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2021-11-25 19:49:50,971 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-25 19:49:51,018 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.11 07:49:51 BoogieIcfgContainer [2021-11-25 19:49:51,018 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-25 19:49:51,019 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-25 19:49:51,019 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-25 19:49:51,019 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-25 19:49:51,020 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 07:49:49" (3/4) ... [2021-11-25 19:49:51,023 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-11-25 19:49:51,023 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-25 19:49:51,025 INFO L158 Benchmark]: Toolchain (without parser) took 2730.06ms. Allocated memory was 109.1MB in the beginning and 142.6MB in the end (delta: 33.6MB). Free memory was 72.7MB in the beginning and 103.0MB in the end (delta: -30.3MB). Peak memory consumption was 3.8MB. Max. memory is 16.1GB. [2021-11-25 19:49:51,025 INFO L158 Benchmark]: CDTParser took 0.39ms. Allocated memory is still 109.1MB. Free memory was 82.1MB in the beginning and 82.1MB in the end (delta: 28.3kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-25 19:49:51,026 INFO L158 Benchmark]: CACSL2BoogieTranslator took 493.10ms. Allocated memory is still 109.1MB. Free memory was 72.6MB in the beginning and 82.8MB in the end (delta: -10.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-25 19:49:51,027 INFO L158 Benchmark]: Boogie Procedure Inliner took 73.79ms. Allocated memory is still 109.1MB. Free memory was 82.8MB in the beginning and 81.2MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-25 19:49:51,027 INFO L158 Benchmark]: Boogie Preprocessor took 67.06ms. Allocated memory is still 109.1MB. Free memory was 81.2MB in the beginning and 79.7MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-25 19:49:51,028 INFO L158 Benchmark]: RCFGBuilder took 642.69ms. Allocated memory is still 109.1MB. Free memory was 79.7MB in the beginning and 63.9MB in the end (delta: 15.7MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2021-11-25 19:49:51,029 INFO L158 Benchmark]: TraceAbstraction took 1436.94ms. Allocated memory was 109.1MB in the beginning and 142.6MB in the end (delta: 33.6MB). Free memory was 63.5MB in the beginning and 103.0MB in the end (delta: -39.5MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-25 19:49:51,029 INFO L158 Benchmark]: Witness Printer took 4.95ms. Allocated memory is still 142.6MB. Free memory is still 103.0MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-25 19:49:51,033 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.39ms. Allocated memory is still 109.1MB. Free memory was 82.1MB in the beginning and 82.1MB in the end (delta: 28.3kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 493.10ms. Allocated memory is still 109.1MB. Free memory was 72.6MB in the beginning and 82.8MB in the end (delta: -10.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 73.79ms. Allocated memory is still 109.1MB. Free memory was 82.8MB in the beginning and 81.2MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 67.06ms. Allocated memory is still 109.1MB. Free memory was 81.2MB in the beginning and 79.7MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 642.69ms. Allocated memory is still 109.1MB. Free memory was 79.7MB in the beginning and 63.9MB in the end (delta: 15.7MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * TraceAbstraction took 1436.94ms. Allocated memory was 109.1MB in the beginning and 142.6MB in the end (delta: 33.6MB). Free memory was 63.5MB in the beginning and 103.0MB in the end (delta: -39.5MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 4.95ms. Allocated memory is still 142.6MB. Free memory is still 103.0MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 76]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 75. Possible FailurePath: [L66] float x = __VERIFIER_nondet_float(); [L67] float y = __VERIFIER_nondet_float(); [L69] CALL, EXPR isnan_float(x) VAL [\old(x)=2139095042] [L57] return x != x; [L69] RET, EXPR isnan_float(x) VAL [isnan_float(x)=1, x=2139095042] [L69] EXPR isnan_float(x) && !isnan_float(y) VAL [isnan_float(x)=1, isnan_float(x) && !isnan_float(y)=1, x=2139095042] [L69] CALL, EXPR isnan_float(y) VAL [\old(x)=2139095043] [L57] return x != x; [L69] RET, EXPR isnan_float(y) VAL [isnan_float(x)=1, isnan_float(x) && !isnan_float(y)=1, isnan_float(y)=0, x=2139095042, y=2139095043] [L69] EXPR isnan_float(x) && !isnan_float(y) VAL [isnan_float(x)=1, isnan_float(x) && !isnan_float(y)=1, isnan_float(y)=0, x=2139095042, y=2139095043] [L69-L70] (isnan_float(x) && !isnan_float(y)) || (!isnan_float(x) && isnan_float(y)) VAL [(isnan_float(x) && !isnan_float(y)) || (!isnan_float(x) && isnan_float(y))=1, isnan_float(x)=1, isnan_float(x) && !isnan_float(y)=1, isnan_float(y)=0, x=2139095042, y=2139095043] [L69-L70] COND TRUE (isnan_float(x) && !isnan_float(y)) || (!isnan_float(x) && isnan_float(y)) [L72] CALL, EXPR fmax_float(x, y) [L46] CALL, EXPR __fpclassify_float(x) VAL [\old(x)=2139095042] [L23] __uint32_t w; VAL [\old(x)=2139095042, x=2139095042] [L26] ieee_float_shape_type gf_u; [L27] gf_u.value = (x) [L28] EXPR gf_u.word [L28] (w) = gf_u.word [L31] COND FALSE !(w == 0x00000000 || w == 0x80000000) [L33-L34] COND FALSE !((w >= 0x00800000 && w <= 0x7f7fffff) || (w >= 0x80800000 && w <= 0xff7fffff)) [L36-L37] COND FALSE !((w >= 0x00000001 && w <= 0x007fffff) || (w >= 0x80000001 && w <= 0x807fffff)) [L39] COND FALSE !(w == 0x7f800000 || w == 0xff800000) [L42] return 0; [L46] RET, EXPR __fpclassify_float(x) VAL [\old(x)=2139095042, \old(y)=2139095043, __fpclassify_float(x)=0, x=2139095042, y=2139095043] [L46] COND TRUE __fpclassify_float(x) == 0 [L47] return y; VAL [\old(x)=2139095042, \old(y)=2139095043, \result=2139095043, x=2139095042, y=2139095043] [L72] RET, EXPR fmax_float(x, y) [L72] float res = fmax_float(x, y); [L75] CALL, EXPR isnan_float(x) VAL [\old(x)=2139095042] [L57] return x != x; [L75] RET, EXPR isnan_float(x) VAL [isnan_float(x)=1, res=2139095043, x=2139095042, y=2139095043] [L75] EXPR isnan_float(x) && !isnan_float(y) VAL [isnan_float(x)=1, isnan_float(x) && !isnan_float(y)=1, res=2139095043, x=2139095042, y=2139095043] [L75] CALL, EXPR isnan_float(y) VAL [\old(x)=2139095043] [L57] return x != x; [L75] RET, EXPR isnan_float(y) VAL [isnan_float(x)=1, isnan_float(x) && !isnan_float(y)=1, isnan_float(y)=0, res=2139095043, x=2139095042, y=2139095043] [L75] EXPR isnan_float(x) && !isnan_float(y) VAL [isnan_float(x)=1, isnan_float(x) && !isnan_float(y)=1, isnan_float(y)=0, res=2139095043, x=2139095042, y=2139095043] [L75] COND TRUE isnan_float(x) && !isnan_float(y) && res != y [L76] reach_error() VAL [res=2139095043, x=2139095042, y=2139095043] - UnprovableResult [Line: 82]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 47 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 1.3s, OverallIterations: 3, TraceHistogramMax: 4, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 18 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 16 mSDsluCounter, 250 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 151 mSDsCounter, 5 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 46 IncrementalHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 5 mSolverCounterUnsat, 110 mSDtfsCounter, 46 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=47occurred in iteration=0, InterpolantAutomatonStates: 8, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 2 MinimizatonAttempts, 7 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 86 NumberOfCodeBlocks, 86 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 51 ConstructedInterpolants, 0 QuantifiedInterpolants, 54 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 PerfectInterpolantSequences, 8/8 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-11-25 19:49:51,086 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/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_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-newlib/float_req_bl_1251.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/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 de540e539c3db6027c1fdb04fcc6cae02aafb8aa58950d31054b2b0b8391af6d --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 19:49:53,937 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 19:49:53,940 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 19:49:54,031 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 19:49:54,031 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 19:49:54,037 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 19:49:54,039 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 19:49:54,045 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 19:49:54,049 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 19:49:54,058 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 19:49:54,060 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 19:49:54,062 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 19:49:54,063 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 19:49:54,066 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 19:49:54,069 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 19:49:54,074 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 19:49:54,076 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 19:49:54,078 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 19:49:54,080 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 19:49:54,090 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 19:49:54,092 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 19:49:54,094 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 19:49:54,097 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 19:49:54,100 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 19:49:54,111 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 19:49:54,111 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 19:49:54,112 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 19:49:54,114 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 19:49:54,115 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 19:49:54,116 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 19:49:54,117 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 19:49:54,118 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 19:49:54,120 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 19:49:54,121 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 19:49:54,123 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 19:49:54,123 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 19:49:54,124 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 19:49:54,125 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 19:49:54,125 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 19:49:54,127 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 19:49:54,128 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 19:49:54,135 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-25 19:49:54,187 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 19:49:54,187 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 19:49:54,188 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 19:49:54,188 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 19:49:54,189 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 19:49:54,189 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 19:49:54,190 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 19:49:54,190 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 19:49:54,190 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 19:49:54,190 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 19:49:54,191 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 19:49:54,192 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 19:49:54,194 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 19:49:54,194 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 19:49:54,194 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 19:49:54,194 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 19:49:54,195 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 19:49:54,195 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 19:49:54,195 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 19:49:54,195 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-25 19:49:54,196 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-25 19:49:54,196 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-25 19:49:54,196 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 19:49:54,196 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 19:49:54,196 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 19:49:54,197 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 19:49:54,197 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 19:49:54,197 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-25 19:49:54,197 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 19:49:54,198 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 19:49:54,198 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 19:49:54,198 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 19:49:54,199 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 19:49:54,199 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-25 19:49:54,199 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-25 19:49:54,200 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 19:49:54,200 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 19:49:54,200 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 19:49:54,201 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_f521d0fe-485b-4a7f-a253-f634f6d3d39d/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> de540e539c3db6027c1fdb04fcc6cae02aafb8aa58950d31054b2b0b8391af6d [2021-11-25 19:49:54,676 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 19:49:54,720 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 19:49:54,724 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 19:49:54,726 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 19:49:54,727 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 19:49:54,728 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/float-newlib/float_req_bl_1251.c [2021-11-25 19:49:54,816 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/data/1aa11ff95/f26ab897b9364d92a551512ec964cec1/FLAG681679913 [2021-11-25 19:49:55,292 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 19:49:55,292 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/sv-benchmarks/c/float-newlib/float_req_bl_1251.c [2021-11-25 19:49:55,308 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/data/1aa11ff95/f26ab897b9364d92a551512ec964cec1/FLAG681679913 [2021-11-25 19:49:55,658 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/data/1aa11ff95/f26ab897b9364d92a551512ec964cec1 [2021-11-25 19:49:55,661 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 19:49:55,663 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 19:49:55,665 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 19:49:55,665 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 19:49:55,678 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 19:49:55,680 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 07:49:55" (1/1) ... [2021-11-25 19:49:55,682 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@36ed78e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:49:55, skipping insertion in model container [2021-11-25 19:49:55,682 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 07:49:55" (1/1) ... [2021-11-25 19:49:55,696 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 19:49:55,725 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 19:49:55,911 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_f521d0fe-485b-4a7f-a253-f634f6d3d39d/sv-benchmarks/c/float-newlib/float_req_bl_1251.c[1980,1993] [2021-11-25 19:49:55,915 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_f521d0fe-485b-4a7f-a253-f634f6d3d39d/sv-benchmarks/c/float-newlib/float_req_bl_1251.c[2139,2152] [2021-11-25 19:49:55,917 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 19:49:55,963 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 19:49:56,025 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_f521d0fe-485b-4a7f-a253-f634f6d3d39d/sv-benchmarks/c/float-newlib/float_req_bl_1251.c[1980,1993] [2021-11-25 19:49:56,029 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_f521d0fe-485b-4a7f-a253-f634f6d3d39d/sv-benchmarks/c/float-newlib/float_req_bl_1251.c[2139,2152] [2021-11-25 19:49:56,030 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 19:49:56,051 INFO L208 MainTranslator]: Completed translation [2021-11-25 19:49:56,051 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:49:56 WrapperNode [2021-11-25 19:49:56,052 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 19:49:56,053 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 19:49:56,053 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 19:49:56,053 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 19:49:56,062 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:49:56" (1/1) ... [2021-11-25 19:49:56,075 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:49:56" (1/1) ... [2021-11-25 19:49:56,101 INFO L137 Inliner]: procedures = 21, calls = 22, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 98 [2021-11-25 19:49:56,101 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 19:49:56,102 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 19:49:56,103 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 19:49:56,103 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 19:49:56,112 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:49:56" (1/1) ... [2021-11-25 19:49:56,113 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:49:56" (1/1) ... [2021-11-25 19:49:56,117 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:49:56" (1/1) ... [2021-11-25 19:49:56,118 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:49:56" (1/1) ... [2021-11-25 19:49:56,128 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:49:56" (1/1) ... [2021-11-25 19:49:56,133 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:49:56" (1/1) ... [2021-11-25 19:49:56,136 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:49:56" (1/1) ... [2021-11-25 19:49:56,141 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 19:49:56,142 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 19:49:56,142 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 19:49:56,142 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 19:49:56,143 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:49:56" (1/1) ... [2021-11-25 19:49:56,153 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 19:49:56,168 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:49:56,188 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 19:49:56,197 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 19:49:56,244 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 19:49:56,245 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-25 19:49:56,245 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-25 19:49:56,245 INFO L130 BoogieDeclarations]: Found specification of procedure __fpclassify_float [2021-11-25 19:49:56,246 INFO L138 BoogieDeclarations]: Found implementation of procedure __fpclassify_float [2021-11-25 19:49:56,246 INFO L130 BoogieDeclarations]: Found specification of procedure isnan_float [2021-11-25 19:49:56,246 INFO L138 BoogieDeclarations]: Found implementation of procedure isnan_float [2021-11-25 19:49:56,246 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-25 19:49:56,247 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 19:49:56,247 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 19:49:56,247 INFO L130 BoogieDeclarations]: Found specification of procedure write~intFLOATTYPE4 [2021-11-25 19:49:56,247 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-25 19:49:56,348 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 19:49:56,350 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 19:49:56,603 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 19:49:56,611 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 19:49:56,612 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-25 19:49:56,614 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 07:49:56 BoogieIcfgContainer [2021-11-25 19:49:56,615 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 19:49:56,617 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 19:49:56,617 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 19:49:56,621 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 19:49:56,621 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 07:49:55" (1/3) ... [2021-11-25 19:49:56,622 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d152f76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 07:49:56, skipping insertion in model container [2021-11-25 19:49:56,623 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:49:56" (2/3) ... [2021-11-25 19:49:56,623 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d152f76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 07:49:56, skipping insertion in model container [2021-11-25 19:49:56,624 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 07:49:56" (3/3) ... [2021-11-25 19:49:56,625 INFO L111 eAbstractionObserver]: Analyzing ICFG float_req_bl_1251.c [2021-11-25 19:49:56,632 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 19:49:56,633 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-25 19:49:56,698 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 19:49:56,707 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 19:49:56,708 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-25 19:49:56,736 INFO L276 IsEmpty]: Start isEmpty. Operand has 55 states, 40 states have (on average 1.475) internal successors, (59), 42 states have internal predecessors, (59), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-11-25 19:49:56,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-25 19:49:56,747 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:49:56,748 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-25 19:49:56,749 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:49:56,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:49:56,763 INFO L85 PathProgramCache]: Analyzing trace with hash 956195031, now seen corresponding path program 1 times [2021-11-25 19:49:56,778 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:49:56,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1894470999] [2021-11-25 19:49:56,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:49:56,808 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:49:56,808 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:49:56,813 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:49:56,861 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-25 19:49:56,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:49:56,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-25 19:49:56,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:49:57,067 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:49:57,067 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:49:57,069 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:49:57,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1894470999] [2021-11-25 19:49:57,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1894470999] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:49:57,070 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:49:57,072 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 19:49:57,075 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663635425] [2021-11-25 19:49:57,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:49:57,097 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-25 19:49:57,098 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:49:57,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-25 19:49:57,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-25 19:49:57,151 INFO L87 Difference]: Start difference. First operand has 55 states, 40 states have (on average 1.475) internal successors, (59), 42 states have internal predecessors, (59), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 2 states, 2 states have (on average 10.5) internal successors, (21), 2 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-25 19:49:57,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:49:57,200 INFO L93 Difference]: Finished difference Result 93 states and 134 transitions. [2021-11-25 19:49:57,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-25 19:49:57,203 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 10.5) internal successors, (21), 2 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 27 [2021-11-25 19:49:57,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:49:57,221 INFO L225 Difference]: With dead ends: 93 [2021-11-25 19:49:57,221 INFO L226 Difference]: Without dead ends: 51 [2021-11-25 19:49:57,232 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-25 19:49:57,242 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 19:49:57,244 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 19:49:57,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-11-25 19:49:57,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2021-11-25 19:49:57,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 37 states have (on average 1.3513513513513513) internal successors, (50), 38 states have internal predecessors, (50), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-11-25 19:49:57,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 70 transitions. [2021-11-25 19:49:57,331 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 70 transitions. Word has length 27 [2021-11-25 19:49:57,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:49:57,336 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 70 transitions. [2021-11-25 19:49:57,336 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 10.5) internal successors, (21), 2 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-25 19:49:57,337 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 70 transitions. [2021-11-25 19:49:57,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-25 19:49:57,342 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:49:57,344 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-25 19:49:57,367 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-25 19:49:57,559 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 19:49:57,560 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:49:57,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:49:57,561 INFO L85 PathProgramCache]: Analyzing trace with hash -1128254016, now seen corresponding path program 1 times [2021-11-25 19:49:57,562 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:49:57,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1401046241] [2021-11-25 19:49:57,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:49:57,563 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:49:57,564 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:49:57,572 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:49:57,583 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-25 19:49:57,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:49:57,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 19:49:57,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:49:57,868 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:49:57,868 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:49:57,869 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:49:57,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1401046241] [2021-11-25 19:49:57,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1401046241] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:49:57,869 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:49:57,870 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 19:49:57,870 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234589632] [2021-11-25 19:49:57,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:49:57,872 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:49:57,872 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:49:57,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:49:57,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:49:57,873 INFO L87 Difference]: Start difference. First operand 51 states and 70 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-25 19:49:57,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:49:57,972 INFO L93 Difference]: Finished difference Result 96 states and 131 transitions. [2021-11-25 19:49:57,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 19:49:57,973 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 28 [2021-11-25 19:49:57,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:49:57,975 INFO L225 Difference]: With dead ends: 96 [2021-11-25 19:49:57,975 INFO L226 Difference]: Without dead ends: 60 [2021-11-25 19:49:57,976 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 25 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 19:49:57,978 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 16 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:49:57,979 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 192 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:49:57,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-11-25 19:49:58,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 53. [2021-11-25 19:49:58,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 39 states have (on average 1.3333333333333333) internal successors, (52), 40 states have internal predecessors, (52), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-11-25 19:49:58,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 72 transitions. [2021-11-25 19:49:58,020 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 72 transitions. Word has length 28 [2021-11-25 19:49:58,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:49:58,020 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 72 transitions. [2021-11-25 19:49:58,021 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-25 19:49:58,021 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 72 transitions. [2021-11-25 19:49:58,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-25 19:49:58,023 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:49:58,023 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 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 19:49:58,042 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-25 19:49:58,224 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 19:49:58,224 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:49:58,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:49:58,225 INFO L85 PathProgramCache]: Analyzing trace with hash 987158491, now seen corresponding path program 1 times [2021-11-25 19:49:58,226 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:49:58,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1443215290] [2021-11-25 19:49:58,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:49:58,227 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:49:58,227 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:49:58,232 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:49:58,233 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-25 19:49:58,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:49:58,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 19:49:58,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:49:58,405 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-25 19:49:58,405 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:49:58,405 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:49:58,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1443215290] [2021-11-25 19:49:58,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1443215290] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:49:58,411 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:49:58,412 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 19:49:58,412 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157988980] [2021-11-25 19:49:58,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:49:58,413 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:49:58,413 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:49:58,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:49:58,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:49:58,419 INFO L87 Difference]: Start difference. First operand 53 states and 72 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-25 19:49:58,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:49:58,458 INFO L93 Difference]: Finished difference Result 76 states and 101 transitions. [2021-11-25 19:49:58,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:49:58,459 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 33 [2021-11-25 19:49:58,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:49:58,462 INFO L225 Difference]: With dead ends: 76 [2021-11-25 19:49:58,462 INFO L226 Difference]: Without dead ends: 56 [2021-11-25 19:49:58,463 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:49:58,464 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 0 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 19:49:58,465 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 200 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 19:49:58,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-11-25 19:49:58,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2021-11-25 19:49:58,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 41 states have (on average 1.3170731707317074) internal successors, (54), 42 states have internal predecessors, (54), 10 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (12), 11 states have call predecessors, (12), 10 states have call successors, (12) [2021-11-25 19:49:58,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 76 transitions. [2021-11-25 19:49:58,476 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 76 transitions. Word has length 33 [2021-11-25 19:49:58,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:49:58,477 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 76 transitions. [2021-11-25 19:49:58,477 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-25 19:49:58,477 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 76 transitions. [2021-11-25 19:49:58,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-25 19:49:58,479 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:49:58,479 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 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 19:49:58,496 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-25 19:49:58,694 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 19:49:58,695 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:49:58,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:49:58,696 INFO L85 PathProgramCache]: Analyzing trace with hash 871427583, now seen corresponding path program 1 times [2021-11-25 19:49:58,697 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:49:58,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1240496104] [2021-11-25 19:49:58,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:49:58,697 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:49:58,697 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:49:58,708 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:49:58,710 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-25 19:49:58,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:49:58,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 19:49:58,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:49:58,923 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-25 19:49:58,924 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:49:58,924 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:49:58,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1240496104] [2021-11-25 19:49:58,928 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1240496104] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:49:58,932 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:49:58,933 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 19:49:58,933 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671734417] [2021-11-25 19:49:58,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:49:58,934 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:49:58,934 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:49:58,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:49:58,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:49:58,939 INFO L87 Difference]: Start difference. First operand 56 states and 76 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-25 19:49:58,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:49:58,988 INFO L93 Difference]: Finished difference Result 79 states and 105 transitions. [2021-11-25 19:49:58,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:49:58,991 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 34 [2021-11-25 19:49:58,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:49:58,993 INFO L225 Difference]: With dead ends: 79 [2021-11-25 19:49:58,993 INFO L226 Difference]: Without dead ends: 59 [2021-11-25 19:49:58,994 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:49:58,995 INFO L933 BasicCegarLoop]: 73 mSDtfsCounter, 0 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 19:49:58,996 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 209 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 19:49:58,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-11-25 19:49:59,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 56. [2021-11-25 19:49:59,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 41 states have (on average 1.3170731707317074) internal successors, (54), 42 states have internal predecessors, (54), 10 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (12), 11 states have call predecessors, (12), 10 states have call successors, (12) [2021-11-25 19:49:59,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 76 transitions. [2021-11-25 19:49:59,027 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 76 transitions. Word has length 34 [2021-11-25 19:49:59,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:49:59,028 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 76 transitions. [2021-11-25 19:49:59,028 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-25 19:49:59,028 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 76 transitions. [2021-11-25 19:49:59,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-25 19:49:59,030 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:49:59,031 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 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 19:49:59,051 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-25 19:49:59,231 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 19:49:59,232 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:49:59,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:49:59,232 INFO L85 PathProgramCache]: Analyzing trace with hash 405124703, now seen corresponding path program 1 times [2021-11-25 19:49:59,233 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:49:59,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1747359528] [2021-11-25 19:49:59,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:49:59,233 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:49:59,234 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:49:59,237 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:49:59,238 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-25 19:49:59,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:49:59,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 19:49:59,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:49:59,462 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-25 19:49:59,463 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:49:59,463 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:49:59,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1747359528] [2021-11-25 19:49:59,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1747359528] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:49:59,464 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:49:59,464 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 19:49:59,464 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602621828] [2021-11-25 19:49:59,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:49:59,465 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:49:59,466 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:49:59,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:49:59,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:49:59,467 INFO L87 Difference]: Start difference. First operand 56 states and 76 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-25 19:49:59,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:49:59,525 INFO L93 Difference]: Finished difference Result 79 states and 105 transitions. [2021-11-25 19:49:59,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:49:59,526 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 35 [2021-11-25 19:49:59,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:49:59,528 INFO L225 Difference]: With dead ends: 79 [2021-11-25 19:49:59,528 INFO L226 Difference]: Without dead ends: 59 [2021-11-25 19:49:59,528 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:49:59,530 INFO L933 BasicCegarLoop]: 73 mSDtfsCounter, 0 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:49:59,530 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 209 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:49:59,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-11-25 19:49:59,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 56. [2021-11-25 19:49:59,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 41 states have (on average 1.3170731707317074) internal successors, (54), 42 states have internal predecessors, (54), 10 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (12), 11 states have call predecessors, (12), 10 states have call successors, (12) [2021-11-25 19:49:59,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 76 transitions. [2021-11-25 19:49:59,547 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 76 transitions. Word has length 35 [2021-11-25 19:49:59,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:49:59,547 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 76 transitions. [2021-11-25 19:49:59,548 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-25 19:49:59,548 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 76 transitions. [2021-11-25 19:49:59,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-25 19:49:59,550 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:49:59,550 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 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 19:49:59,582 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-25 19:49:59,782 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 19:49:59,783 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:49:59,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:49:59,784 INFO L85 PathProgramCache]: Analyzing trace with hash 1955992579, now seen corresponding path program 1 times [2021-11-25 19:49:59,784 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:49:59,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [27613309] [2021-11-25 19:49:59,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:49:59,785 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:49:59,785 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:49:59,790 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:49:59,791 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-25 19:49:59,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:49:59,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 19:49:59,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:49:59,968 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-25 19:49:59,969 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:49:59,969 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:49:59,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [27613309] [2021-11-25 19:49:59,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [27613309] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:49:59,970 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:49:59,970 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 19:49:59,970 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898671699] [2021-11-25 19:49:59,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:49:59,971 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:49:59,971 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:49:59,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:49:59,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:49:59,973 INFO L87 Difference]: Start difference. First operand 56 states and 76 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-25 19:50:00,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:50:00,017 INFO L93 Difference]: Finished difference Result 79 states and 105 transitions. [2021-11-25 19:50:00,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:50:00,018 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 36 [2021-11-25 19:50:00,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:50:00,025 INFO L225 Difference]: With dead ends: 79 [2021-11-25 19:50:00,026 INFO L226 Difference]: Without dead ends: 59 [2021-11-25 19:50:00,028 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:50:00,033 INFO L933 BasicCegarLoop]: 73 mSDtfsCounter, 0 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 19:50:00,034 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 209 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 19:50:00,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-11-25 19:50:00,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 56. [2021-11-25 19:50:00,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 41 states have (on average 1.3170731707317074) internal successors, (54), 42 states have internal predecessors, (54), 10 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (12), 11 states have call predecessors, (12), 10 states have call successors, (12) [2021-11-25 19:50:00,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 76 transitions. [2021-11-25 19:50:00,058 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 76 transitions. Word has length 36 [2021-11-25 19:50:00,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:50:00,058 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 76 transitions. [2021-11-25 19:50:00,059 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-25 19:50:00,059 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 76 transitions. [2021-11-25 19:50:00,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-25 19:50:00,061 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:50:00,061 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 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 19:50:00,076 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-25 19:50:00,264 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 19:50:00,265 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:50:00,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:50:00,266 INFO L85 PathProgramCache]: Analyzing trace with hash 1662589572, now seen corresponding path program 1 times [2021-11-25 19:50:00,266 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:50:00,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [941683203] [2021-11-25 19:50:00,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:50:00,267 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:50:00,267 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:50:00,268 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:50:00,269 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-25 19:50:00,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:50:00,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-25 19:50:00,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:50:00,756 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-25 19:50:00,757 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:50:01,217 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-25 19:50:01,217 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:50:01,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [941683203] [2021-11-25 19:50:01,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [941683203] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:50:01,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1417006616] [2021-11-25 19:50:01,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:50:01,218 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 19:50:01,219 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 19:50:01,224 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 19:50:01,253 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2021-11-25 19:50:01,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:50:01,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-25 19:50:01,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:50:01,474 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-25 19:50:01,474 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:50:01,475 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1417006616] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:50:01,475 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-25 19:50:01,482 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8, 9] total 14 [2021-11-25 19:50:01,482 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613562200] [2021-11-25 19:50:01,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:50:01,483 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:50:01,483 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:50:01,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:50:01,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-11-25 19:50:01,485 INFO L87 Difference]: Start difference. First operand 56 states and 76 transitions. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-25 19:50:01,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:50:01,503 INFO L93 Difference]: Finished difference Result 59 states and 79 transitions. [2021-11-25 19:50:01,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:50:01,504 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 36 [2021-11-25 19:50:01,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:50:01,506 INFO L225 Difference]: With dead ends: 59 [2021-11-25 19:50:01,507 INFO L226 Difference]: Without dead ends: 57 [2021-11-25 19:50:01,507 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-11-25 19:50:01,510 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 0 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 19:50:01,510 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 132 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 19:50:01,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-11-25 19:50:01,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2021-11-25 19:50:01,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 42 states have (on average 1.3095238095238095) internal successors, (55), 43 states have internal predecessors, (55), 10 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (12), 11 states have call predecessors, (12), 10 states have call successors, (12) [2021-11-25 19:50:01,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 77 transitions. [2021-11-25 19:50:01,533 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 77 transitions. Word has length 36 [2021-11-25 19:50:01,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:50:01,533 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 77 transitions. [2021-11-25 19:50:01,533 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-25 19:50:01,533 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 77 transitions. [2021-11-25 19:50:01,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-25 19:50:01,535 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:50:01,535 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:50:01,547 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-25 19:50:01,737 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (9)] Forceful destruction successful, exit code 0 [2021-11-25 19:50:01,937 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt [2021-11-25 19:50:01,937 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:50:01,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:50:01,938 INFO L85 PathProgramCache]: Analyzing trace with hash -490349503, now seen corresponding path program 1 times [2021-11-25 19:50:01,938 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:50:01,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1740173832] [2021-11-25 19:50:01,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:50:01,939 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:50:01,939 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:50:01,940 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:50:01,949 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-25 19:50:02,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:50:02,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-25 19:50:02,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:50:02,775 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-25 19:50:02,776 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:50:03,162 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-25 19:50:03,162 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:50:03,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1740173832] [2021-11-25 19:50:03,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1740173832] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:50:03,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1386635760] [2021-11-25 19:50:03,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:50:03,164 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 19:50:03,164 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 19:50:03,165 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 19:50:03,184 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2021-11-25 19:50:03,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:50:03,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-25 19:50:03,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:50:04,065 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-25 19:50:04,065 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:50:04,282 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-25 19:50:04,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1386635760] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:50:04,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136431022] [2021-11-25 19:50:04,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:50:04,283 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:50:04,283 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:50:04,288 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:50:04,304 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-25 19:50:04,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:50:04,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-25 19:50:04,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:50:05,024 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-25 19:50:05,024 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:50:05,518 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-25 19:50:05,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1136431022] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-25 19:50:05,518 INFO L186 FreeRefinementEngine]: Found 1 perfect and 5 imperfect interpolant sequences. [2021-11-25 19:50:05,518 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9, 9, 9, 9, 10] total 28 [2021-11-25 19:50:05,519 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119097632] [2021-11-25 19:50:05,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:50:05,519 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-25 19:50:05,520 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:50:05,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-25 19:50:05,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=655, Unknown=0, NotChecked=0, Total=756 [2021-11-25 19:50:05,521 INFO L87 Difference]: Start difference. First operand 57 states and 77 transitions. Second operand has 8 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 3 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2021-11-25 19:50:06,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:50:06,445 INFO L93 Difference]: Finished difference Result 75 states and 100 transitions. [2021-11-25 19:50:06,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-25 19:50:06,446 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 3 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 41 [2021-11-25 19:50:06,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:50:06,448 INFO L225 Difference]: With dead ends: 75 [2021-11-25 19:50:06,448 INFO L226 Difference]: Without dead ends: 73 [2021-11-25 19:50:06,449 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=144, Invalid=978, Unknown=0, NotChecked=0, Total=1122 [2021-11-25 19:50:06,450 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 52 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-25 19:50:06,450 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 333 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-25 19:50:06,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-11-25 19:50:06,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 63. [2021-11-25 19:50:06,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 46 states have (on average 1.3043478260869565) internal successors, (60), 47 states have internal predecessors, (60), 12 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (14), 13 states have call predecessors, (14), 12 states have call successors, (14) [2021-11-25 19:50:06,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 86 transitions. [2021-11-25 19:50:06,460 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 86 transitions. Word has length 41 [2021-11-25 19:50:06,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:50:06,461 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 86 transitions. [2021-11-25 19:50:06,461 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 3 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2021-11-25 19:50:06,461 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 86 transitions. [2021-11-25 19:50:06,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-25 19:50:06,463 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:50:06,463 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:50:06,476 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-25 19:50:06,676 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 0 [2021-11-25 19:50:06,904 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-25 19:50:07,073 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:50:07,073 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:50:07,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:50:07,074 INFO L85 PathProgramCache]: Analyzing trace with hash 1869413518, now seen corresponding path program 1 times [2021-11-25 19:50:07,074 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:50:07,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [498990467] [2021-11-25 19:50:07,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:50:07,075 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:50:07,075 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:50:07,076 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:50:07,078 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-25 19:50:07,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:50:07,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-25 19:50:07,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:50:07,492 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-25 19:50:07,493 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:50:07,858 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-25 19:50:07,859 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:50:07,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [498990467] [2021-11-25 19:50:07,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [498990467] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:50:07,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1640074585] [2021-11-25 19:50:07,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:50:07,860 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 19:50:07,861 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 19:50:07,863 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 19:50:07,865 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2021-11-25 19:50:08,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:50:08,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-25 19:50:08,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:50:08,161 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-25 19:50:08,162 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:50:08,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1640074585] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:50:08,162 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-25 19:50:08,162 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8, 9] total 14 [2021-11-25 19:50:08,163 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640579328] [2021-11-25 19:50:08,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:50:08,164 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:50:08,165 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:50:08,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:50:08,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-11-25 19:50:08,166 INFO L87 Difference]: Start difference. First operand 63 states and 86 transitions. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-11-25 19:50:08,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:50:08,188 INFO L93 Difference]: Finished difference Result 66 states and 88 transitions. [2021-11-25 19:50:08,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:50:08,189 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 43 [2021-11-25 19:50:08,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:50:08,195 INFO L225 Difference]: With dead ends: 66 [2021-11-25 19:50:08,195 INFO L226 Difference]: Without dead ends: 63 [2021-11-25 19:50:08,196 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-11-25 19:50:08,200 INFO L933 BasicCegarLoop]: 70 mSDtfsCounter, 0 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 19:50:08,200 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 134 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 19:50:08,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-11-25 19:50:08,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2021-11-25 19:50:08,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 46 states have (on average 1.2826086956521738) internal successors, (59), 47 states have internal predecessors, (59), 12 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (14), 13 states have call predecessors, (14), 12 states have call successors, (14) [2021-11-25 19:50:08,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 85 transitions. [2021-11-25 19:50:08,222 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 85 transitions. Word has length 43 [2021-11-25 19:50:08,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:50:08,223 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 85 transitions. [2021-11-25 19:50:08,223 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-11-25 19:50:08,223 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 85 transitions. [2021-11-25 19:50:08,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-25 19:50:08,229 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:50:08,230 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 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] [2021-11-25 19:50:08,237 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (14)] Forceful destruction successful, exit code 0 [2021-11-25 19:50:08,452 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-25 19:50:08,643 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 19:50:08,643 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:50:08,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:50:08,644 INFO L85 PathProgramCache]: Analyzing trace with hash 972082008, now seen corresponding path program 1 times [2021-11-25 19:50:08,644 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:50:08,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1398822434] [2021-11-25 19:50:08,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:50:08,644 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:50:08,645 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:50:08,645 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:50:08,648 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-25 19:50:08,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:50:08,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 19:50:08,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:50:08,810 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-25 19:50:08,810 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:50:08,810 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:50:08,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1398822434] [2021-11-25 19:50:08,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1398822434] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:50:08,811 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:50:08,811 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 19:50:08,811 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237826028] [2021-11-25 19:50:08,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:50:08,811 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:50:08,812 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:50:08,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:50:08,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:50:08,813 INFO L87 Difference]: Start difference. First operand 63 states and 85 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-25 19:50:08,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:50:08,834 INFO L93 Difference]: Finished difference Result 87 states and 114 transitions. [2021-11-25 19:50:08,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:50:08,847 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 46 [2021-11-25 19:50:08,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:50:08,848 INFO L225 Difference]: With dead ends: 87 [2021-11-25 19:50:08,849 INFO L226 Difference]: Without dead ends: 66 [2021-11-25 19:50:08,849 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:50:08,850 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 0 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 19:50:08,851 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 197 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 19:50:08,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-11-25 19:50:08,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2021-11-25 19:50:08,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 48 states have (on average 1.2708333333333333) internal successors, (61), 49 states have internal predecessors, (61), 12 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (16), 14 states have call predecessors, (16), 12 states have call successors, (16) [2021-11-25 19:50:08,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 89 transitions. [2021-11-25 19:50:08,860 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 89 transitions. Word has length 46 [2021-11-25 19:50:08,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:50:08,861 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 89 transitions. [2021-11-25 19:50:08,861 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-25 19:50:08,861 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 89 transitions. [2021-11-25 19:50:08,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-25 19:50:08,871 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:50:08,871 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 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] [2021-11-25 19:50:08,891 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-25 19:50:09,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 19:50:09,088 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:50:09,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:50:09,089 INFO L85 PathProgramCache]: Analyzing trace with hash 411048800, now seen corresponding path program 1 times [2021-11-25 19:50:09,089 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:50:09,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [135383821] [2021-11-25 19:50:09,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:50:09,090 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:50:09,090 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:50:09,091 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:50:09,126 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-25 19:50:09,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:50:09,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 19:50:09,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:50:09,286 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-25 19:50:09,286 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:50:09,286 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:50:09,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [135383821] [2021-11-25 19:50:09,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [135383821] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:50:09,287 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:50:09,287 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 19:50:09,287 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299759898] [2021-11-25 19:50:09,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:50:09,288 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:50:09,288 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:50:09,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:50:09,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:50:09,289 INFO L87 Difference]: Start difference. First operand 66 states and 89 transitions. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-25 19:50:09,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:50:09,313 INFO L93 Difference]: Finished difference Result 90 states and 118 transitions. [2021-11-25 19:50:09,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:50:09,314 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 47 [2021-11-25 19:50:09,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:50:09,316 INFO L225 Difference]: With dead ends: 90 [2021-11-25 19:50:09,316 INFO L226 Difference]: Without dead ends: 69 [2021-11-25 19:50:09,316 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:50:09,317 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 0 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 19:50:09,318 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 206 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 19:50:09,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-11-25 19:50:09,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 66. [2021-11-25 19:50:09,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 48 states have (on average 1.2708333333333333) internal successors, (61), 49 states have internal predecessors, (61), 12 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (16), 14 states have call predecessors, (16), 12 states have call successors, (16) [2021-11-25 19:50:09,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 89 transitions. [2021-11-25 19:50:09,327 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 89 transitions. Word has length 47 [2021-11-25 19:50:09,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:50:09,328 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 89 transitions. [2021-11-25 19:50:09,328 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-25 19:50:09,328 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 89 transitions. [2021-11-25 19:50:09,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-25 19:50:09,329 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:50:09,330 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 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] [2021-11-25 19:50:09,349 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-25 19:50:09,545 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 19:50:09,545 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:50:09,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:50:09,546 INFO L85 PathProgramCache]: Analyzing trace with hash -877982242, now seen corresponding path program 1 times [2021-11-25 19:50:09,546 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:50:09,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [510386136] [2021-11-25 19:50:09,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:50:09,547 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:50:09,547 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:50:09,548 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:50:09,549 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-25 19:50:09,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:50:09,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-25 19:50:09,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:50:09,908 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-25 19:50:09,908 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:50:10,056 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:50:10,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [510386136] [2021-11-25 19:50:10,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [510386136] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:50:10,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [583536809] [2021-11-25 19:50:10,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:50:10,057 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 19:50:10,057 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 19:50:10,058 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 19:50:10,059 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2021-11-25 19:50:10,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:50:10,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-25 19:50:10,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:50:10,576 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-25 19:50:10,577 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:50:10,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [583536809] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:50:10,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674537627] [2021-11-25 19:50:10,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:50:10,648 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:50:10,649 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:50:10,653 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:50:10,661 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-25 19:50:10,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:50:10,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-25 19:50:10,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:50:11,074 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-25 19:50:11,074 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:50:11,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1674537627] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:50:11,428 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:50:11,428 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 8 [2021-11-25 19:50:11,428 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701166189] [2021-11-25 19:50:11,429 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:50:11,429 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-25 19:50:11,430 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:50:11,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-25 19:50:11,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-11-25 19:50:11,431 INFO L87 Difference]: Start difference. First operand 66 states and 89 transitions. Second operand has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 5 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2021-11-25 19:50:12,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:50:12,527 INFO L93 Difference]: Finished difference Result 127 states and 172 transitions. [2021-11-25 19:50:12,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-25 19:50:12,528 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 5 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) Word has length 48 [2021-11-25 19:50:12,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:50:12,529 INFO L225 Difference]: With dead ends: 127 [2021-11-25 19:50:12,530 INFO L226 Difference]: Without dead ends: 105 [2021-11-25 19:50:12,530 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-11-25 19:50:12,531 INFO L933 BasicCegarLoop]: 82 mSDtfsCounter, 87 mSDsluCounter, 326 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 408 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-25 19:50:12,532 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 408 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-25 19:50:12,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-11-25 19:50:12,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 80. [2021-11-25 19:50:12,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 58 states have (on average 1.2758620689655173) internal successors, (74), 57 states have internal predecessors, (74), 16 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (24), 20 states have call predecessors, (24), 16 states have call successors, (24) [2021-11-25 19:50:12,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 114 transitions. [2021-11-25 19:50:12,545 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 114 transitions. Word has length 48 [2021-11-25 19:50:12,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:50:12,546 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 114 transitions. [2021-11-25 19:50:12,546 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 5 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2021-11-25 19:50:12,546 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 114 transitions. [2021-11-25 19:50:12,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-25 19:50:12,548 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:50:12,548 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 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] [2021-11-25 19:50:12,589 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2021-11-25 19:50:12,767 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (18)] Forceful destruction successful, exit code 0 [2021-11-25 19:50:12,975 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-25 19:50:13,165 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 19:50:13,165 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:50:13,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:50:13,166 INFO L85 PathProgramCache]: Analyzing trace with hash -1899050596, now seen corresponding path program 1 times [2021-11-25 19:50:13,166 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:50:13,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1626076942] [2021-11-25 19:50:13,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:50:13,166 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:50:13,167 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:50:13,167 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:50:13,170 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-25 19:50:13,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:50:13,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-25 19:50:13,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:50:13,834 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-25 19:50:13,834 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:50:13,834 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:50:13,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1626076942] [2021-11-25 19:50:13,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1626076942] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:50:13,835 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:50:13,835 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-25 19:50:13,835 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868394215] [2021-11-25 19:50:13,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:50:13,836 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-25 19:50:13,836 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:50:13,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-25 19:50:13,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-11-25 19:50:13,837 INFO L87 Difference]: Start difference. First operand 80 states and 114 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 3 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-25 19:50:15,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:50:15,238 INFO L93 Difference]: Finished difference Result 124 states and 170 transitions. [2021-11-25 19:50:15,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-25 19:50:15,238 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 3 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 48 [2021-11-25 19:50:15,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:50:15,240 INFO L225 Difference]: With dead ends: 124 [2021-11-25 19:50:15,240 INFO L226 Difference]: Without dead ends: 122 [2021-11-25 19:50:15,240 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-11-25 19:50:15,241 INFO L933 BasicCegarLoop]: 84 mSDtfsCounter, 79 mSDsluCounter, 525 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 609 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-25 19:50:15,241 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 609 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-25 19:50:15,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-11-25 19:50:15,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 87. [2021-11-25 19:50:15,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 64 states have (on average 1.265625) internal successors, (81), 62 states have internal predecessors, (81), 16 states have call successors, (16), 2 states have call predecessors, (16), 5 states have return successors, (28), 22 states have call predecessors, (28), 16 states have call successors, (28) [2021-11-25 19:50:15,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 125 transitions. [2021-11-25 19:50:15,255 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 125 transitions. Word has length 48 [2021-11-25 19:50:15,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:50:15,256 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 125 transitions. [2021-11-25 19:50:15,256 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 3 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-25 19:50:15,257 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 125 transitions. [2021-11-25 19:50:15,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-25 19:50:15,258 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:50:15,259 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 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] [2021-11-25 19:50:15,293 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-25 19:50:15,474 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 19:50:15,475 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:50:15,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:50:15,475 INFO L85 PathProgramCache]: Analyzing trace with hash 505566420, now seen corresponding path program 1 times [2021-11-25 19:50:15,476 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:50:15,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [866776693] [2021-11-25 19:50:15,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:50:15,477 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:50:15,477 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:50:15,478 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:50:15,513 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-25 19:50:15,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:50:15,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 19:50:15,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:50:15,691 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-25 19:50:15,691 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:50:15,692 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:50:15,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [866776693] [2021-11-25 19:50:15,692 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [866776693] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:50:15,692 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:50:15,692 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 19:50:15,693 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882001190] [2021-11-25 19:50:15,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:50:15,694 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:50:15,695 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:50:15,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:50:15,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:50:15,696 INFO L87 Difference]: Start difference. First operand 87 states and 125 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-25 19:50:15,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:50:15,758 INFO L93 Difference]: Finished difference Result 112 states and 158 transitions. [2021-11-25 19:50:15,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:50:15,758 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 48 [2021-11-25 19:50:15,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:50:15,760 INFO L225 Difference]: With dead ends: 112 [2021-11-25 19:50:15,760 INFO L226 Difference]: Without dead ends: 91 [2021-11-25 19:50:15,761 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:50:15,761 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 0 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:50:15,762 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 206 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:50:15,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-11-25 19:50:15,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 87. [2021-11-25 19:50:15,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 64 states have (on average 1.265625) internal successors, (81), 62 states have internal predecessors, (81), 16 states have call successors, (16), 2 states have call predecessors, (16), 5 states have return successors, (28), 22 states have call predecessors, (28), 16 states have call successors, (28) [2021-11-25 19:50:15,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 125 transitions. [2021-11-25 19:50:15,777 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 125 transitions. Word has length 48 [2021-11-25 19:50:15,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:50:15,778 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 125 transitions. [2021-11-25 19:50:15,778 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-25 19:50:15,778 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 125 transitions. [2021-11-25 19:50:15,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-25 19:50:15,779 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:50:15,780 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:50:15,801 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-25 19:50:15,996 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 19:50:15,996 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:50:15,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:50:15,997 INFO L85 PathProgramCache]: Analyzing trace with hash 2112773896, now seen corresponding path program 1 times [2021-11-25 19:50:15,997 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:50:15,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1700283642] [2021-11-25 19:50:15,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:50:15,997 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:50:15,998 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:50:15,998 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:50:16,001 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-25 19:50:16,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:50:16,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-25 19:50:16,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:50:16,397 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 20 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-25 19:50:16,398 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:50:16,806 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-25 19:50:16,806 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:50:16,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1700283642] [2021-11-25 19:50:16,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1700283642] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:50:16,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [44102956] [2021-11-25 19:50:16,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:50:16,807 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 19:50:16,807 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 19:50:16,809 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 19:50:16,821 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2021-11-25 19:50:17,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:50:17,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-25 19:50:17,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:50:17,652 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-25 19:50:17,652 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:50:18,215 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-25 19:50:18,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [44102956] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:50:18,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342197403] [2021-11-25 19:50:18,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:50:18,216 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:50:18,216 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:50:18,221 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:50:18,240 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-25 19:50:18,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:50:18,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-25 19:50:18,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:50:18,738 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-25 19:50:18,738 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:50:19,232 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-25 19:50:19,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1342197403] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:50:19,232 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-25 19:50:19,232 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9, 10, 12, 12] total 27 [2021-11-25 19:50:19,233 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665795694] [2021-11-25 19:50:19,233 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-25 19:50:19,234 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-25 19:50:19,234 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:50:19,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-25 19:50:19,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=625, Unknown=0, NotChecked=0, Total=702 [2021-11-25 19:50:19,235 INFO L87 Difference]: Start difference. First operand 87 states and 125 transitions. Second operand has 27 states, 27 states have (on average 2.4814814814814814) internal successors, (67), 17 states have internal predecessors, (67), 4 states have call successors, (13), 2 states have call predecessors, (13), 6 states have return successors, (21), 14 states have call predecessors, (21), 4 states have call successors, (21) [2021-11-25 19:50:21,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:50:21,020 INFO L93 Difference]: Finished difference Result 161 states and 224 transitions. [2021-11-25 19:50:21,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-25 19:50:21,020 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.4814814814814814) internal successors, (67), 17 states have internal predecessors, (67), 4 states have call successors, (13), 2 states have call predecessors, (13), 6 states have return successors, (21), 14 states have call predecessors, (21), 4 states have call successors, (21) Word has length 48 [2021-11-25 19:50:21,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:50:21,022 INFO L225 Difference]: With dead ends: 161 [2021-11-25 19:50:21,023 INFO L226 Difference]: Without dead ends: 133 [2021-11-25 19:50:21,024 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=268, Invalid=1454, Unknown=0, NotChecked=0, Total=1722 [2021-11-25 19:50:21,025 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 207 mSDsluCounter, 1146 mSDsCounter, 0 mSdLazyCounter, 609 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 1224 SdHoareTripleChecker+Invalid, 722 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 609 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-25 19:50:21,025 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [212 Valid, 1224 Invalid, 722 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 609 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-25 19:50:21,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-11-25 19:50:21,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 112. [2021-11-25 19:50:21,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 83 states have (on average 1.216867469879518) internal successors, (101), 80 states have internal predecessors, (101), 22 states have call successors, (22), 2 states have call predecessors, (22), 5 states have return successors, (39), 29 states have call predecessors, (39), 22 states have call successors, (39) [2021-11-25 19:50:21,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 162 transitions. [2021-11-25 19:50:21,041 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 162 transitions. Word has length 48 [2021-11-25 19:50:21,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:50:21,042 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 162 transitions. [2021-11-25 19:50:21,042 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.4814814814814814) internal successors, (67), 17 states have internal predecessors, (67), 4 states have call successors, (13), 2 states have call predecessors, (13), 6 states have return successors, (21), 14 states have call predecessors, (21), 4 states have call successors, (21) [2021-11-25 19:50:21,042 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 162 transitions. [2021-11-25 19:50:21,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-25 19:50:21,044 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:50:21,045 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 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] [2021-11-25 19:50:21,061 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (23)] Forceful destruction successful, exit code 0 [2021-11-25 19:50:21,275 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-11-25 19:50:21,458 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (22)] Ended with exit code 0 [2021-11-25 19:50:21,648 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 19:50:21,648 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:50:21,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:50:21,649 INFO L85 PathProgramCache]: Analyzing trace with hash 113915812, now seen corresponding path program 1 times [2021-11-25 19:50:21,649 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:50:21,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [329177993] [2021-11-25 19:50:21,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:50:21,649 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:50:21,650 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:50:21,651 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:50:21,653 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-25 19:50:21,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:50:21,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-25 19:50:21,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:50:22,398 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-25 19:50:22,398 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:50:22,762 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-25 19:50:22,762 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:50:22,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [329177993] [2021-11-25 19:50:22,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [329177993] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:50:22,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [522595326] [2021-11-25 19:50:22,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:50:22,763 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 19:50:22,763 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 19:50:22,764 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 19:50:22,776 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2021-11-25 19:50:23,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:50:23,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-25 19:50:23,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:50:23,730 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-25 19:50:23,730 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:50:23,971 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-25 19:50:23,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [522595326] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:50:23,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703859302] [2021-11-25 19:50:23,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:50:23,972 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:50:23,972 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:50:23,977 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:50:23,999 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-25 19:50:24,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:50:24,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-25 19:50:24,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:50:24,905 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-25 19:50:24,905 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:50:25,186 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-25 19:50:25,187 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [703859302] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:50:25,187 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-25 19:50:25,187 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10, 10, 14, 13] total 24 [2021-11-25 19:50:25,187 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911856743] [2021-11-25 19:50:25,187 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-25 19:50:25,188 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-25 19:50:25,188 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:50:25,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-25 19:50:25,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2021-11-25 19:50:25,189 INFO L87 Difference]: Start difference. First operand 112 states and 162 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 19 states have internal predecessors, (54), 5 states have call successors, (10), 1 states have call predecessors, (10), 4 states have return successors, (14), 10 states have call predecessors, (14), 5 states have call successors, (14) [2021-11-25 19:50:26,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:50:26,345 INFO L93 Difference]: Finished difference Result 125 states and 175 transitions. [2021-11-25 19:50:26,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-25 19:50:26,345 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 19 states have internal predecessors, (54), 5 states have call successors, (10), 1 states have call predecessors, (10), 4 states have return successors, (14), 10 states have call predecessors, (14), 5 states have call successors, (14) Word has length 49 [2021-11-25 19:50:26,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:50:26,347 INFO L225 Difference]: With dead ends: 125 [2021-11-25 19:50:26,347 INFO L226 Difference]: Without dead ends: 113 [2021-11-25 19:50:26,349 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 266 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=205, Invalid=917, Unknown=0, NotChecked=0, Total=1122 [2021-11-25 19:50:26,349 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 97 mSDsluCounter, 716 mSDsCounter, 0 mSdLazyCounter, 383 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 785 SdHoareTripleChecker+Invalid, 426 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 383 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-25 19:50:26,350 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 785 Invalid, 426 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 383 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-25 19:50:26,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-11-25 19:50:26,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 109. [2021-11-25 19:50:26,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 80 states have (on average 1.2125) internal successors, (97), 78 states have internal predecessors, (97), 22 states have call successors, (22), 2 states have call predecessors, (22), 5 states have return successors, (38), 28 states have call predecessors, (38), 22 states have call successors, (38) [2021-11-25 19:50:26,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 157 transitions. [2021-11-25 19:50:26,363 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 157 transitions. Word has length 49 [2021-11-25 19:50:26,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:50:26,363 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 157 transitions. [2021-11-25 19:50:26,364 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 19 states have internal predecessors, (54), 5 states have call successors, (10), 1 states have call predecessors, (10), 4 states have return successors, (14), 10 states have call predecessors, (14), 5 states have call successors, (14) [2021-11-25 19:50:26,364 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 157 transitions. [2021-11-25 19:50:26,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-25 19:50:26,366 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:50:26,366 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 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] [2021-11-25 19:50:26,384 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-25 19:50:26,607 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-11-25 19:50:26,783 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (26)] Forceful destruction successful, exit code 0 [2021-11-25 19:50:26,981 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt [2021-11-25 19:50:26,981 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:50:26,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:50:26,982 INFO L85 PathProgramCache]: Analyzing trace with hash -552676772, now seen corresponding path program 1 times [2021-11-25 19:50:26,982 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:50:26,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [946032856] [2021-11-25 19:50:26,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:50:26,983 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:50:26,983 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:50:26,984 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:50:27,024 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-25 19:50:27,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:50:27,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 19:50:27,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:50:27,205 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-25 19:50:27,205 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:50:27,206 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:50:27,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [946032856] [2021-11-25 19:50:27,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [946032856] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:50:27,206 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:50:27,206 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 19:50:27,206 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191068] [2021-11-25 19:50:27,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:50:27,207 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:50:27,207 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:50:27,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:50:27,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:50:27,208 INFO L87 Difference]: Start difference. First operand 109 states and 157 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-25 19:50:27,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:50:27,270 INFO L93 Difference]: Finished difference Result 144 states and 200 transitions. [2021-11-25 19:50:27,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:50:27,271 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 49 [2021-11-25 19:50:27,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:50:27,273 INFO L225 Difference]: With dead ends: 144 [2021-11-25 19:50:27,273 INFO L226 Difference]: Without dead ends: 111 [2021-11-25 19:50:27,273 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:50:27,274 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 0 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:50:27,275 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 206 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:50:27,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-11-25 19:50:27,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 107. [2021-11-25 19:50:27,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 79 states have (on average 1.2151898734177216) internal successors, (96), 76 states have internal predecessors, (96), 22 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (32), 28 states have call predecessors, (32), 22 states have call successors, (32) [2021-11-25 19:50:27,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 150 transitions. [2021-11-25 19:50:27,287 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 150 transitions. Word has length 49 [2021-11-25 19:50:27,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:50:27,287 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 150 transitions. [2021-11-25 19:50:27,288 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-25 19:50:27,288 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 150 transitions. [2021-11-25 19:50:27,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-25 19:50:27,290 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:50:27,290 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 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] [2021-11-25 19:50:27,313 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-11-25 19:50:27,504 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 19:50:27,504 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:50:27,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:50:27,505 INFO L85 PathProgramCache]: Analyzing trace with hash -1549749125, now seen corresponding path program 1 times [2021-11-25 19:50:27,505 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:50:27,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1909327524] [2021-11-25 19:50:27,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:50:27,505 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:50:27,506 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:50:27,507 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:50:27,508 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-11-25 19:50:27,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:50:27,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-25 19:50:27,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:50:28,515 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-25 19:50:28,515 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:50:28,515 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:50:28,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1909327524] [2021-11-25 19:50:28,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1909327524] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:50:28,516 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:50:28,516 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-11-25 19:50:28,516 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178004163] [2021-11-25 19:50:28,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:50:28,520 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-25 19:50:28,520 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:50:28,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-25 19:50:28,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-11-25 19:50:28,522 INFO L87 Difference]: Start difference. First operand 107 states and 150 transitions. Second operand has 14 states, 14 states have (on average 2.5) internal successors, (35), 13 states have internal predecessors, (35), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-25 19:50:29,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:50:29,686 INFO L93 Difference]: Finished difference Result 135 states and 188 transitions. [2021-11-25 19:50:29,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-25 19:50:29,690 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 13 states have internal predecessors, (35), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 49 [2021-11-25 19:50:29,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:50:29,691 INFO L225 Difference]: With dead ends: 135 [2021-11-25 19:50:29,692 INFO L226 Difference]: Without dead ends: 118 [2021-11-25 19:50:29,693 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2021-11-25 19:50:29,693 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 69 mSDsluCounter, 588 mSDsCounter, 0 mSdLazyCounter, 370 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 663 SdHoareTripleChecker+Invalid, 452 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 370 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 73 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-25 19:50:29,694 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 663 Invalid, 452 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 370 Invalid, 0 Unknown, 73 Unchecked, 0.7s Time] [2021-11-25 19:50:29,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-11-25 19:50:29,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 95. [2021-11-25 19:50:29,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 71 states have (on average 1.2253521126760563) internal successors, (87), 68 states have internal predecessors, (87), 18 states have call successors, (18), 2 states have call predecessors, (18), 4 states have return successors, (26), 24 states have call predecessors, (26), 18 states have call successors, (26) [2021-11-25 19:50:29,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 131 transitions. [2021-11-25 19:50:29,706 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 131 transitions. Word has length 49 [2021-11-25 19:50:29,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:50:29,707 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 131 transitions. [2021-11-25 19:50:29,707 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 13 states have internal predecessors, (35), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-25 19:50:29,707 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 131 transitions. [2021-11-25 19:50:29,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-25 19:50:29,709 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:50:29,709 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 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] [2021-11-25 19:50:29,735 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2021-11-25 19:50:29,924 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 19:50:29,924 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:50:29,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:50:29,925 INFO L85 PathProgramCache]: Analyzing trace with hash 1053759293, now seen corresponding path program 1 times [2021-11-25 19:50:29,925 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:50:29,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1592572914] [2021-11-25 19:50:29,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:50:29,925 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:50:29,926 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:50:29,926 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:50:29,927 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-11-25 19:50:30,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:50:30,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-25 19:50:30,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:50:30,309 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-25 19:50:30,309 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:50:30,309 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:50:30,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1592572914] [2021-11-25 19:50:30,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1592572914] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:50:30,310 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:50:30,310 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-25 19:50:30,310 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146910586] [2021-11-25 19:50:30,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:50:30,311 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-25 19:50:30,311 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:50:30,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-25 19:50:30,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-25 19:50:30,312 INFO L87 Difference]: Start difference. First operand 95 states and 131 transitions. Second operand has 8 states, 8 states have (on average 3.625) internal successors, (29), 6 states have internal predecessors, (29), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-25 19:50:30,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:50:30,752 INFO L93 Difference]: Finished difference Result 164 states and 220 transitions. [2021-11-25 19:50:30,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-25 19:50:30,753 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 6 states have internal predecessors, (29), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 50 [2021-11-25 19:50:30,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:50:30,754 INFO L225 Difference]: With dead ends: 164 [2021-11-25 19:50:30,755 INFO L226 Difference]: Without dead ends: 111 [2021-11-25 19:50:30,755 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-11-25 19:50:30,756 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 54 mSDsluCounter, 298 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 352 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 19:50:30,756 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 352 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 19:50:30,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-11-25 19:50:30,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 95. [2021-11-25 19:50:30,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 71 states have (on average 1.2112676056338028) internal successors, (86), 68 states have internal predecessors, (86), 18 states have call successors, (18), 2 states have call predecessors, (18), 4 states have return successors, (26), 24 states have call predecessors, (26), 18 states have call successors, (26) [2021-11-25 19:50:30,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 130 transitions. [2021-11-25 19:50:30,774 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 130 transitions. Word has length 50 [2021-11-25 19:50:30,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:50:30,774 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 130 transitions. [2021-11-25 19:50:30,775 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 6 states have internal predecessors, (29), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-25 19:50:30,775 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 130 transitions. [2021-11-25 19:50:30,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-25 19:50:30,777 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:50:30,778 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:50:30,800 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2021-11-25 19:50:30,994 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 19:50:30,994 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:50:30,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:50:30,995 INFO L85 PathProgramCache]: Analyzing trace with hash -147301104, now seen corresponding path program 1 times [2021-11-25 19:50:30,995 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:50:30,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [397134322] [2021-11-25 19:50:30,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:50:30,995 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:50:30,995 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:50:30,996 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:50:30,999 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-11-25 19:50:31,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:50:31,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-25 19:50:31,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:50:31,372 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-25 19:50:31,372 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:50:31,372 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:50:31,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [397134322] [2021-11-25 19:50:31,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [397134322] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:50:31,372 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:50:31,372 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-25 19:50:31,373 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120531534] [2021-11-25 19:50:31,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:50:31,373 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-25 19:50:31,373 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:50:31,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-25 19:50:31,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-25 19:50:31,374 INFO L87 Difference]: Start difference. First operand 95 states and 130 transitions. Second operand has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 3 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2021-11-25 19:50:32,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:50:32,138 INFO L93 Difference]: Finished difference Result 154 states and 205 transitions. [2021-11-25 19:50:32,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 19:50:32,139 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 3 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) Word has length 55 [2021-11-25 19:50:32,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:50:32,140 INFO L225 Difference]: With dead ends: 154 [2021-11-25 19:50:32,140 INFO L226 Difference]: Without dead ends: 132 [2021-11-25 19:50:32,141 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-25 19:50:32,142 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 20 mSDsluCounter, 275 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 337 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-25 19:50:32,142 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 337 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-25 19:50:32,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-11-25 19:50:32,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 95. [2021-11-25 19:50:32,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 71 states have (on average 1.1830985915492958) internal successors, (84), 68 states have internal predecessors, (84), 18 states have call successors, (18), 2 states have call predecessors, (18), 4 states have return successors, (26), 24 states have call predecessors, (26), 18 states have call successors, (26) [2021-11-25 19:50:32,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 128 transitions. [2021-11-25 19:50:32,154 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 128 transitions. Word has length 55 [2021-11-25 19:50:32,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:50:32,155 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 128 transitions. [2021-11-25 19:50:32,155 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 3 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2021-11-25 19:50:32,155 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 128 transitions. [2021-11-25 19:50:32,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-25 19:50:32,156 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:50:32,157 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:50:32,170 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2021-11-25 19:50:32,368 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 19:50:32,368 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:50:32,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:50:32,369 INFO L85 PathProgramCache]: Analyzing trace with hash -1451512262, now seen corresponding path program 1 times [2021-11-25 19:50:32,369 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:50:32,370 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [384256109] [2021-11-25 19:50:32,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:50:32,370 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:50:32,370 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:50:32,371 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:50:32,373 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-11-25 19:50:32,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:50:32,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-25 19:50:32,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:50:33,283 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 27 proven. 4 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-25 19:50:33,283 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:50:34,942 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-25 19:50:34,942 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:50:34,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [384256109] [2021-11-25 19:50:34,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [384256109] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:50:34,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [760692762] [2021-11-25 19:50:34,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:50:34,943 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 19:50:34,943 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 19:50:34,945 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 19:50:34,946 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (33)] Waiting until timeout for monitored process [2021-11-25 19:50:35,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:50:35,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-25 19:50:35,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:50:35,749 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 27 proven. 4 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-25 19:50:35,749 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:50:37,321 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-25 19:50:37,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [760692762] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:50:37,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352649793] [2021-11-25 19:50:37,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:50:37,322 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:50:37,322 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:50:37,322 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:50:37,323 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-11-25 19:50:37,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:50:37,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 39 conjunts are in the unsatisfiable core [2021-11-25 19:50:37,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:50:38,114 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 29 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-25 19:50:38,114 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:50:39,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [352649793] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:50:39,027 INFO L186 FreeRefinementEngine]: Found 0 perfect and 5 imperfect interpolant sequences. [2021-11-25 19:50:39,027 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13, 13, 16] total 28 [2021-11-25 19:50:39,027 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022773111] [2021-11-25 19:50:39,027 INFO L85 oduleStraightlineAll]: Using 5 imperfect interpolants to construct interpolant automaton [2021-11-25 19:50:39,028 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-25 19:50:39,028 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:50:39,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-25 19:50:39,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=879, Unknown=0, NotChecked=0, Total=992 [2021-11-25 19:50:39,029 INFO L87 Difference]: Start difference. First operand 95 states and 128 transitions. Second operand has 28 states, 26 states have (on average 2.230769230769231) internal successors, (58), 23 states have internal predecessors, (58), 5 states have call successors, (12), 2 states have call predecessors, (12), 7 states have return successors, (16), 7 states have call predecessors, (16), 5 states have call successors, (16) [2021-11-25 19:50:41,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:50:41,011 INFO L93 Difference]: Finished difference Result 201 states and 274 transitions. [2021-11-25 19:50:41,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-25 19:50:41,012 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 26 states have (on average 2.230769230769231) internal successors, (58), 23 states have internal predecessors, (58), 5 states have call successors, (12), 2 states have call predecessors, (12), 7 states have return successors, (16), 7 states have call predecessors, (16), 5 states have call successors, (16) Word has length 55 [2021-11-25 19:50:41,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:50:41,013 INFO L225 Difference]: With dead ends: 201 [2021-11-25 19:50:41,014 INFO L226 Difference]: Without dead ends: 135 [2021-11-25 19:50:41,015 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 261 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=302, Invalid=1954, Unknown=0, NotChecked=0, Total=2256 [2021-11-25 19:50:41,016 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 148 mSDsluCounter, 479 mSDsCounter, 0 mSdLazyCounter, 621 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 519 SdHoareTripleChecker+Invalid, 760 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 621 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 90 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-25 19:50:41,016 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 519 Invalid, 760 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 621 Invalid, 0 Unknown, 90 Unchecked, 0.9s Time] [2021-11-25 19:50:41,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-11-25 19:50:41,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 97. [2021-11-25 19:50:41,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 72 states have (on average 1.1666666666666667) internal successors, (84), 71 states have internal predecessors, (84), 19 states have call successors, (19), 2 states have call predecessors, (19), 4 states have return successors, (27), 23 states have call predecessors, (27), 19 states have call successors, (27) [2021-11-25 19:50:41,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 130 transitions. [2021-11-25 19:50:41,029 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 130 transitions. Word has length 55 [2021-11-25 19:50:41,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:50:41,029 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 130 transitions. [2021-11-25 19:50:41,030 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 26 states have (on average 2.230769230769231) internal successors, (58), 23 states have internal predecessors, (58), 5 states have call successors, (12), 2 states have call predecessors, (12), 7 states have return successors, (16), 7 states have call predecessors, (16), 5 states have call successors, (16) [2021-11-25 19:50:41,030 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 130 transitions. [2021-11-25 19:50:41,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-25 19:50:41,031 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:50:41,032 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 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] [2021-11-25 19:50:41,046 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (33)] Forceful destruction successful, exit code 0 [2021-11-25 19:50:41,245 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (32)] Ended with exit code 0 [2021-11-25 19:50:41,460 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-11-25 19:50:41,635 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:50:41,636 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:50:41,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:50:41,636 INFO L85 PathProgramCache]: Analyzing trace with hash -1847293526, now seen corresponding path program 1 times [2021-11-25 19:50:41,636 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:50:41,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1610803403] [2021-11-25 19:50:41,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:50:41,637 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:50:41,637 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:50:41,638 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:50:41,639 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2021-11-25 19:50:41,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:50:41,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-25 19:50:41,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:50:41,982 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 20 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-25 19:50:41,982 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:50:42,415 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-25 19:50:42,416 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:50:42,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1610803403] [2021-11-25 19:50:42,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1610803403] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:50:42,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1767185690] [2021-11-25 19:50:42,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:50:42,417 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 19:50:42,417 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 19:50:42,424 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 19:50:42,436 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (36)] Waiting until timeout for monitored process [2021-11-25 19:50:42,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:50:42,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 19:50:42,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:50:42,803 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-25 19:50:42,804 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:50:42,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1767185690] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:50:42,804 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-25 19:50:42,804 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [9, 10] total 14 [2021-11-25 19:50:42,805 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270994744] [2021-11-25 19:50:42,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:50:42,805 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:50:42,805 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:50:42,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:50:42,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-11-25 19:50:42,806 INFO L87 Difference]: Start difference. First operand 97 states and 130 transitions. Second operand has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-25 19:50:42,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:50:42,926 INFO L93 Difference]: Finished difference Result 146 states and 188 transitions. [2021-11-25 19:50:42,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:50:42,933 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 56 [2021-11-25 19:50:42,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:50:42,934 INFO L225 Difference]: With dead ends: 146 [2021-11-25 19:50:42,934 INFO L226 Difference]: Without dead ends: 93 [2021-11-25 19:50:42,938 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-11-25 19:50:42,939 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 4 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:50:42,940 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 180 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:50:42,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-11-25 19:50:42,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2021-11-25 19:50:42,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 69 states have (on average 1.144927536231884) internal successors, (79), 68 states have internal predecessors, (79), 18 states have call successors, (18), 2 states have call predecessors, (18), 4 states have return successors, (24), 22 states have call predecessors, (24), 18 states have call successors, (24) [2021-11-25 19:50:42,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 121 transitions. [2021-11-25 19:50:42,960 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 121 transitions. Word has length 56 [2021-11-25 19:50:42,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:50:42,960 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 121 transitions. [2021-11-25 19:50:42,961 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-25 19:50:42,961 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 121 transitions. [2021-11-25 19:50:42,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-25 19:50:42,962 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:50:42,962 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 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] [2021-11-25 19:50:42,968 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (36)] Forceful destruction successful, exit code 0 [2021-11-25 19:50:43,174 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (35)] Ended with exit code 0 [2021-11-25 19:50:43,365 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 19:50:43,365 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:50:43,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:50:43,366 INFO L85 PathProgramCache]: Analyzing trace with hash 1290194610, now seen corresponding path program 1 times [2021-11-25 19:50:43,366 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:50:43,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [838780738] [2021-11-25 19:50:43,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:50:43,366 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:50:43,367 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:50:43,367 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:50:43,372 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2021-11-25 19:50:43,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:50:43,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-25 19:50:43,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:50:43,697 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-25 19:50:43,698 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:50:44,123 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-25 19:50:44,123 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:50:44,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [838780738] [2021-11-25 19:50:44,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [838780738] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:50:44,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [431302284] [2021-11-25 19:50:44,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:50:44,124 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 19:50:44,124 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 19:50:44,125 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 19:50:44,126 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (38)] Waiting until timeout for monitored process [2021-11-25 19:50:44,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:50:44,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-25 19:50:44,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:50:45,043 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-25 19:50:45,044 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:50:45,579 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-25 19:50:45,579 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [431302284] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-25 19:50:45,579 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:50:45,579 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [8, 9, 11] total 26 [2021-11-25 19:50:45,579 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600788527] [2021-11-25 19:50:45,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:50:45,580 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-25 19:50:45,580 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:50:45,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-25 19:50:45,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=582, Unknown=0, NotChecked=0, Total=650 [2021-11-25 19:50:45,581 INFO L87 Difference]: Start difference. First operand 93 states and 121 transitions. Second operand has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 3 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2021-11-25 19:50:46,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:50:46,399 INFO L93 Difference]: Finished difference Result 116 states and 149 transitions. [2021-11-25 19:50:46,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-25 19:50:46,400 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 3 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) Word has length 56 [2021-11-25 19:50:46,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:50:46,401 INFO L225 Difference]: With dead ends: 116 [2021-11-25 19:50:46,401 INFO L226 Difference]: Without dead ends: 114 [2021-11-25 19:50:46,402 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=115, Invalid=941, Unknown=0, NotChecked=0, Total=1056 [2021-11-25 19:50:46,403 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 43 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 19:50:46,403 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 354 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-25 19:50:46,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-11-25 19:50:46,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 85. [2021-11-25 19:50:46,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 62 states have (on average 1.1612903225806452) internal successors, (72), 62 states have internal predecessors, (72), 18 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (20), 20 states have call predecessors, (20), 18 states have call successors, (20) [2021-11-25 19:50:46,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 110 transitions. [2021-11-25 19:50:46,417 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 110 transitions. Word has length 56 [2021-11-25 19:50:46,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:50:46,418 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 110 transitions. [2021-11-25 19:50:46,418 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 3 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2021-11-25 19:50:46,418 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 110 transitions. [2021-11-25 19:50:46,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-25 19:50:46,420 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:50:46,420 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 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] [2021-11-25 19:50:46,427 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (38)] Forceful destruction successful, exit code 0 [2021-11-25 19:50:46,635 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (37)] Ended with exit code 0 [2021-11-25 19:50:46,823 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 19:50:46,823 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:50:46,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:50:46,824 INFO L85 PathProgramCache]: Analyzing trace with hash -373470327, now seen corresponding path program 1 times [2021-11-25 19:50:46,824 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:50:46,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1463968658] [2021-11-25 19:50:46,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:50:46,824 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:50:46,825 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:50:46,825 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:50:46,826 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2021-11-25 19:50:46,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:50:46,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-25 19:50:46,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:50:47,165 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-25 19:50:47,165 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:50:47,486 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-25 19:50:47,486 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:50:47,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1463968658] [2021-11-25 19:50:47,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1463968658] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:50:47,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2121526319] [2021-11-25 19:50:47,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:50:47,487 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 19:50:47,487 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 19:50:47,488 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 19:50:47,489 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (40)] Waiting until timeout for monitored process [2021-11-25 19:50:47,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:50:47,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-25 19:50:47,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:50:48,104 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-25 19:50:48,105 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:50:48,339 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-25 19:50:48,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2121526319] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:50:48,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603014159] [2021-11-25 19:50:48,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:50:48,340 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:50:48,340 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:50:48,340 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:50:48,342 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-11-25 19:50:48,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:50:48,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-25 19:50:48,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:50:48,801 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-25 19:50:48,801 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:50:49,202 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-25 19:50:49,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [603014159] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:50:49,202 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-25 19:50:49,203 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8, 9, 11, 10] total 23 [2021-11-25 19:50:49,203 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947932756] [2021-11-25 19:50:49,203 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-25 19:50:49,204 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-25 19:50:49,204 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:50:49,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-25 19:50:49,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=448, Unknown=0, NotChecked=0, Total=506 [2021-11-25 19:50:49,205 INFO L87 Difference]: Start difference. First operand 85 states and 110 transitions. Second operand has 23 states, 23 states have (on average 2.739130434782609) internal successors, (63), 15 states have internal predecessors, (63), 4 states have call successors, (14), 2 states have call predecessors, (14), 6 states have return successors, (20), 12 states have call predecessors, (20), 4 states have call successors, (20) [2021-11-25 19:50:50,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:50:50,753 INFO L93 Difference]: Finished difference Result 113 states and 142 transitions. [2021-11-25 19:50:50,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-25 19:50:50,754 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.739130434782609) internal successors, (63), 15 states have internal predecessors, (63), 4 states have call successors, (14), 2 states have call predecessors, (14), 6 states have return successors, (20), 12 states have call predecessors, (20), 4 states have call successors, (20) Word has length 56 [2021-11-25 19:50:50,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:50:50,755 INFO L225 Difference]: With dead ends: 113 [2021-11-25 19:50:50,755 INFO L226 Difference]: Without dead ends: 94 [2021-11-25 19:50:50,756 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 346 GetRequests, 310 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=237, Invalid=1169, Unknown=0, NotChecked=0, Total=1406 [2021-11-25 19:50:50,758 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 160 mSDsluCounter, 527 mSDsCounter, 0 mSdLazyCounter, 396 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 571 SdHoareTripleChecker+Invalid, 494 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-25 19:50:50,758 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 571 Invalid, 494 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 396 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-25 19:50:50,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-11-25 19:50:50,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 72. [2021-11-25 19:50:50,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 53 states have (on average 1.1320754716981132) internal successors, (60), 52 states have internal predecessors, (60), 15 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (17), 17 states have call predecessors, (17), 15 states have call successors, (17) [2021-11-25 19:50:50,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 92 transitions. [2021-11-25 19:50:50,784 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 92 transitions. Word has length 56 [2021-11-25 19:50:50,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:50:50,785 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 92 transitions. [2021-11-25 19:50:50,785 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.739130434782609) internal successors, (63), 15 states have internal predecessors, (63), 4 states have call successors, (14), 2 states have call predecessors, (14), 6 states have return successors, (20), 12 states have call predecessors, (20), 4 states have call successors, (20) [2021-11-25 19:50:50,785 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 92 transitions. [2021-11-25 19:50:50,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-25 19:50:50,787 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:50:50,787 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:50:50,830 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2021-11-25 19:50:51,017 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (39)] Forceful destruction successful, exit code 0 [2021-11-25 19:50:51,208 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (40)] Forceful destruction successful, exit code 0 [2021-11-25 19:50:51,400 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt [2021-11-25 19:50:51,401 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:50:51,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:50:51,401 INFO L85 PathProgramCache]: Analyzing trace with hash 253909467, now seen corresponding path program 1 times [2021-11-25 19:50:51,401 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:50:51,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2087498037] [2021-11-25 19:50:51,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:50:51,402 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:50:51,402 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:50:51,403 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:50:51,406 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2021-11-25 19:50:51,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:50:51,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-25 19:50:51,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:50:51,824 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-25 19:50:51,824 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:50:51,825 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:50:51,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2087498037] [2021-11-25 19:50:51,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2087498037] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:50:51,825 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:50:51,825 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-25 19:50:51,825 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706750478] [2021-11-25 19:50:51,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:50:51,826 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-25 19:50:51,826 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:50:51,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-25 19:50:51,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-11-25 19:50:51,827 INFO L87 Difference]: Start difference. First operand 72 states and 92 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 states have internal predecessors, (40), 3 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-25 19:50:52,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:50:52,592 INFO L93 Difference]: Finished difference Result 102 states and 128 transitions. [2021-11-25 19:50:52,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-25 19:50:52,592 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 states have internal predecessors, (40), 3 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 62 [2021-11-25 19:50:52,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:50:52,593 INFO L225 Difference]: With dead ends: 102 [2021-11-25 19:50:52,593 INFO L226 Difference]: Without dead ends: 74 [2021-11-25 19:50:52,594 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-11-25 19:50:52,594 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 40 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-25 19:50:52,594 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 312 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-25 19:50:52,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-11-25 19:50:52,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2021-11-25 19:50:52,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 54 states have (on average 1.1296296296296295) internal successors, (61), 54 states have internal predecessors, (61), 15 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (19), 17 states have call predecessors, (19), 15 states have call successors, (19) [2021-11-25 19:50:52,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 95 transitions. [2021-11-25 19:50:52,602 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 95 transitions. Word has length 62 [2021-11-25 19:50:52,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:50:52,602 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 95 transitions. [2021-11-25 19:50:52,603 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 states have internal predecessors, (40), 3 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-25 19:50:52,603 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 95 transitions. [2021-11-25 19:50:52,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-25 19:50:52,604 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:50:52,604 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:50:52,631 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (42)] Forceful destruction successful, exit code 0 [2021-11-25 19:50:52,819 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 19:50:52,820 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:50:52,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:50:52,820 INFO L85 PathProgramCache]: Analyzing trace with hash 647887735, now seen corresponding path program 1 times [2021-11-25 19:50:52,820 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:50:52,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [782777828] [2021-11-25 19:50:52,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:50:52,821 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:50:52,821 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:50:52,821 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:50:52,822 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2021-11-25 19:50:52,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:50:52,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-25 19:50:52,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:50:53,334 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-25 19:50:53,334 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:50:53,334 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:50:53,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [782777828] [2021-11-25 19:50:53,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [782777828] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:50:53,334 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:50:53,334 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-25 19:50:53,335 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491267958] [2021-11-25 19:50:53,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:50:53,335 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-25 19:50:53,335 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:50:53,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-25 19:50:53,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-11-25 19:50:53,337 INFO L87 Difference]: Start difference. First operand 74 states and 95 transitions. Second operand has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 3 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-25 19:50:54,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:50:54,464 INFO L93 Difference]: Finished difference Result 104 states and 131 transitions. [2021-11-25 19:50:54,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-25 19:50:54,464 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 3 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 63 [2021-11-25 19:50:54,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:50:54,465 INFO L225 Difference]: With dead ends: 104 [2021-11-25 19:50:54,465 INFO L226 Difference]: Without dead ends: 76 [2021-11-25 19:50:54,466 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-11-25 19:50:54,467 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 37 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 318 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 32 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-25 19:50:54,467 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 318 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 175 Invalid, 0 Unknown, 32 Unchecked, 0.9s Time] [2021-11-25 19:50:54,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-11-25 19:50:54,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 74. [2021-11-25 19:50:54,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 54 states have (on average 1.1296296296296295) internal successors, (61), 54 states have internal predecessors, (61), 15 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (19), 17 states have call predecessors, (19), 15 states have call successors, (19) [2021-11-25 19:50:54,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 95 transitions. [2021-11-25 19:50:54,475 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 95 transitions. Word has length 63 [2021-11-25 19:50:54,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:50:54,476 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 95 transitions. [2021-11-25 19:50:54,476 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 3 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-25 19:50:54,476 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 95 transitions. [2021-11-25 19:50:54,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-25 19:50:54,477 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:50:54,478 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:50:54,494 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (43)] Ended with exit code 0 [2021-11-25 19:50:54,693 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 19:50:54,694 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:50:54,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:50:54,694 INFO L85 PathProgramCache]: Analyzing trace with hash -589254976, now seen corresponding path program 1 times [2021-11-25 19:50:54,694 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:50:54,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [566962488] [2021-11-25 19:50:54,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:50:54,695 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:50:54,695 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:50:54,696 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:50:54,697 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2021-11-25 19:50:54,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:50:54,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-25 19:50:54,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:50:55,344 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-25 19:50:55,344 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:50:55,872 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-25 19:50:55,872 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:50:55,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [566962488] [2021-11-25 19:50:55,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [566962488] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:50:55,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1636211297] [2021-11-25 19:50:55,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:50:55,873 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 19:50:55,873 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 19:50:55,874 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 19:50:55,875 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (45)] Waiting until timeout for monitored process [2021-11-25 19:50:56,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:50:56,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-25 19:50:56,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:50:57,034 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-11-25 19:50:57,034 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:50:57,327 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-11-25 19:50:57,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1636211297] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:50:57,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534781557] [2021-11-25 19:50:57,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:50:57,327 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:50:57,327 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:50:57,328 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:50:57,333 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-11-25 19:50:57,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:50:57,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-25 19:50:57,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:50:58,153 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-25 19:50:58,153 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:50:58,668 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-11-25 19:50:58,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [534781557] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:50:58,668 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-25 19:50:58,668 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 12, 9] total 37 [2021-11-25 19:50:58,668 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601484790] [2021-11-25 19:50:58,669 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-25 19:50:58,670 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-11-25 19:50:58,670 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:50:58,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-11-25 19:50:58,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=1178, Unknown=0, NotChecked=0, Total=1332 [2021-11-25 19:50:58,671 INFO L87 Difference]: Start difference. First operand 74 states and 95 transitions. Second operand has 37 states, 36 states have (on average 2.7777777777777777) internal successors, (100), 31 states have internal predecessors, (100), 13 states have call successors, (28), 1 states have call predecessors, (28), 5 states have return successors, (33), 18 states have call predecessors, (33), 13 states have call successors, (33) [2021-11-25 19:51:04,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:51:04,764 INFO L93 Difference]: Finished difference Result 157 states and 200 transitions. [2021-11-25 19:51:04,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-25 19:51:04,765 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 2.7777777777777777) internal successors, (100), 31 states have internal predecessors, (100), 13 states have call successors, (28), 1 states have call predecessors, (28), 5 states have return successors, (33), 18 states have call predecessors, (33), 13 states have call successors, (33) Word has length 63 [2021-11-25 19:51:04,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:51:04,766 INFO L225 Difference]: With dead ends: 157 [2021-11-25 19:51:04,766 INFO L226 Difference]: Without dead ends: 117 [2021-11-25 19:51:04,768 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 397 GetRequests, 338 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 657 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=540, Invalid=3000, Unknown=0, NotChecked=0, Total=3540 [2021-11-25 19:51:04,769 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 254 mSDsluCounter, 1441 mSDsCounter, 0 mSdLazyCounter, 1442 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 265 SdHoareTripleChecker+Valid, 1517 SdHoareTripleChecker+Invalid, 1585 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 1442 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-11-25 19:51:04,770 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [265 Valid, 1517 Invalid, 1585 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 1442 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-11-25 19:51:04,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-11-25 19:51:04,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 72. [2021-11-25 19:51:04,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 52 states have (on average 1.0961538461538463) internal successors, (57), 54 states have internal predecessors, (57), 15 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (19), 15 states have call predecessors, (19), 15 states have call successors, (19) [2021-11-25 19:51:04,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 91 transitions. [2021-11-25 19:51:04,791 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 91 transitions. Word has length 63 [2021-11-25 19:51:04,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:51:04,791 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 91 transitions. [2021-11-25 19:51:04,792 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 2.7777777777777777) internal successors, (100), 31 states have internal predecessors, (100), 13 states have call successors, (28), 1 states have call predecessors, (28), 5 states have return successors, (33), 18 states have call predecessors, (33), 13 states have call successors, (33) [2021-11-25 19:51:04,792 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 91 transitions. [2021-11-25 19:51:04,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-25 19:51:04,793 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:51:04,793 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:51:04,801 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (45)] Forceful destruction successful, exit code 0 [2021-11-25 19:51:05,022 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2021-11-25 19:51:05,208 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (44)] Ended with exit code 0 [2021-11-25 19:51:05,397 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 19:51:05,398 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:51:05,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:51:05,398 INFO L85 PathProgramCache]: Analyzing trace with hash -472199073, now seen corresponding path program 1 times [2021-11-25 19:51:05,399 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:51:05,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1803098474] [2021-11-25 19:51:05,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:51:05,399 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:51:05,399 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:51:05,401 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:51:05,405 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (47)] Waiting until timeout for monitored process [2021-11-25 19:51:05,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:51:05,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-25 19:51:05,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:51:05,869 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-25 19:51:05,869 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:51:05,869 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:51:05,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1803098474] [2021-11-25 19:51:05,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1803098474] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:51:05,870 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:51:05,870 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-25 19:51:05,870 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685969122] [2021-11-25 19:51:05,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:51:05,870 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-25 19:51:05,871 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:51:05,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-25 19:51:05,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-11-25 19:51:05,871 INFO L87 Difference]: Start difference. First operand 72 states and 91 transitions. Second operand has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 3 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-25 19:51:06,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:51:06,890 INFO L93 Difference]: Finished difference Result 102 states and 127 transitions. [2021-11-25 19:51:06,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-25 19:51:06,891 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 3 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 64 [2021-11-25 19:51:06,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:51:06,892 INFO L225 Difference]: With dead ends: 102 [2021-11-25 19:51:06,892 INFO L226 Difference]: Without dead ends: 74 [2021-11-25 19:51:06,892 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-11-25 19:51:06,893 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 35 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 310 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 33 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-25 19:51:06,894 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 310 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 175 Invalid, 0 Unknown, 33 Unchecked, 0.9s Time] [2021-11-25 19:51:06,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-11-25 19:51:06,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 72. [2021-11-25 19:51:06,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 52 states have (on average 1.0961538461538463) internal successors, (57), 54 states have internal predecessors, (57), 15 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (19), 15 states have call predecessors, (19), 15 states have call successors, (19) [2021-11-25 19:51:06,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 91 transitions. [2021-11-25 19:51:06,902 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 91 transitions. Word has length 64 [2021-11-25 19:51:06,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:51:06,903 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 91 transitions. [2021-11-25 19:51:06,903 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 3 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-25 19:51:06,903 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 91 transitions. [2021-11-25 19:51:06,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-25 19:51:06,904 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:51:06,904 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:51:06,932 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (47)] Ended with exit code 0 [2021-11-25 19:51:07,120 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 19:51:07,121 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:51:07,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:51:07,121 INFO L85 PathProgramCache]: Analyzing trace with hash -1283662981, now seen corresponding path program 1 times [2021-11-25 19:51:07,121 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:51:07,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [382697619] [2021-11-25 19:51:07,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:51:07,122 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:51:07,122 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:51:07,123 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:51:07,125 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (48)] Waiting until timeout for monitored process [2021-11-25 19:51:07,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:51:07,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-25 19:51:07,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:51:07,583 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-25 19:51:07,583 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:51:07,583 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:51:07,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [382697619] [2021-11-25 19:51:07,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [382697619] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:51:07,583 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:51:07,584 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-25 19:51:07,584 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055961308] [2021-11-25 19:51:07,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:51:07,584 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-25 19:51:07,584 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:51:07,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-25 19:51:07,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-11-25 19:51:07,585 INFO L87 Difference]: Start difference. First operand 72 states and 91 transitions. Second operand has 10 states, 10 states have (on average 4.3) internal successors, (43), 9 states have internal predecessors, (43), 3 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-25 19:51:10,472 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-25 19:51:10,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:51:10,926 INFO L93 Difference]: Finished difference Result 100 states and 122 transitions. [2021-11-25 19:51:10,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-25 19:51:10,927 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 9 states have internal predecessors, (43), 3 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 65 [2021-11-25 19:51:10,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:51:10,928 INFO L225 Difference]: With dead ends: 100 [2021-11-25 19:51:10,928 INFO L226 Difference]: Without dead ends: 72 [2021-11-25 19:51:10,929 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-11-25 19:51:10,929 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 34 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 310 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2021-11-25 19:51:10,930 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 310 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 207 Invalid, 1 Unknown, 0 Unchecked, 3.2s Time] [2021-11-25 19:51:10,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-11-25 19:51:10,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 70. [2021-11-25 19:51:10,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 51 states have (on average 1.0980392156862746) internal successors, (56), 52 states have internal predecessors, (56), 15 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-11-25 19:51:10,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 86 transitions. [2021-11-25 19:51:10,937 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 86 transitions. Word has length 65 [2021-11-25 19:51:10,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:51:10,937 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 86 transitions. [2021-11-25 19:51:10,938 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 9 states have internal predecessors, (43), 3 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-25 19:51:10,938 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 86 transitions. [2021-11-25 19:51:10,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-25 19:51:10,939 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:51:10,939 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:51:10,960 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (48)] Forceful destruction successful, exit code 0 [2021-11-25 19:51:11,154 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 19:51:11,154 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:51:11,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:51:11,154 INFO L85 PathProgramCache]: Analyzing trace with hash -322048964, now seen corresponding path program 1 times [2021-11-25 19:51:11,155 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:51:11,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2023426025] [2021-11-25 19:51:11,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:51:11,155 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:51:11,155 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:51:11,156 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:51:11,157 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (49)] Waiting until timeout for monitored process [2021-11-25 19:51:11,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:51:11,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 19:51:11,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:51:11,404 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-25 19:51:11,404 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:51:11,404 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:51:11,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2023426025] [2021-11-25 19:51:11,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2023426025] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:51:11,404 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:51:11,404 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 19:51:11,405 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587657371] [2021-11-25 19:51:11,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:51:11,405 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:51:11,405 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:51:11,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:51:11,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:51:11,406 INFO L87 Difference]: Start difference. First operand 70 states and 86 transitions. Second operand has 4 states, 4 states have (on average 9.5) internal successors, (38), 3 states have internal predecessors, (38), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-25 19:51:11,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:51:11,425 INFO L93 Difference]: Finished difference Result 73 states and 88 transitions. [2021-11-25 19:51:11,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:51:11,425 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 3 states have internal predecessors, (38), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) Word has length 65 [2021-11-25 19:51:11,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:51:11,426 INFO L225 Difference]: With dead ends: 73 [2021-11-25 19:51:11,426 INFO L226 Difference]: Without dead ends: 0 [2021-11-25 19:51:11,426 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:51:11,427 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 0 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 19:51:11,427 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 115 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 19:51:11,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-11-25 19:51:11,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-11-25 19:51:11,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 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 19:51:11,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-11-25 19:51:11,428 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 65 [2021-11-25 19:51:11,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:51:11,428 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-11-25 19:51:11,428 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 3 states have internal predecessors, (38), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-25 19:51:11,428 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-11-25 19:51:11,429 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-11-25 19:51:11,431 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2021-11-25 19:51:11,432 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2021-11-25 19:51:11,452 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (49)] Forceful destruction successful, exit code 0 [2021-11-25 19:51:11,644 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 19:51:11,647 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-11-25 19:51:16,562 INFO L858 garLoopResultBuilder]: For program point isnan_floatFINAL(line 57) no Hoare annotation was computed. [2021-11-25 19:51:16,563 INFO L861 garLoopResultBuilder]: At program point isnan_floatENTRY(line 57) the Hoare annotation is: true [2021-11-25 19:51:16,563 INFO L858 garLoopResultBuilder]: For program point isnan_floatEXIT(line 57) no Hoare annotation was computed. [2021-11-25 19:51:16,563 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION(line 82) no Hoare annotation was computed. [2021-11-25 19:51:16,563 INFO L854 garLoopResultBuilder]: At program point L81(line 81) the Hoare annotation is: (let ((.cse0 (fp.eq |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1|))) (or (and (= |ULTIMATE.start_fmax_float_~y#1| |ULTIMATE.start_main_~y~0#1|) (not (fp.eq |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~x~0#1|)) .cse0) (and (= |ULTIMATE.start_fmax_float_#res#1| |ULTIMATE.start_main_~x~0#1|) (= |ULTIMATE.start_main_~res~0#1| |ULTIMATE.start_main_~x~0#1|) (not .cse0) (= |ULTIMATE.start_fmax_float_~x#1| |ULTIMATE.start_main_~x~0#1|) (not (fp.eq |ULTIMATE.start_fmax_float_~y#1| |ULTIMATE.start_fmax_float_~y#1|))))) [2021-11-25 19:51:16,563 INFO L858 garLoopResultBuilder]: For program point L81-1(line 81) no Hoare annotation was computed. [2021-11-25 19:51:16,563 INFO L858 garLoopResultBuilder]: For program point L81-2(line 81) no Hoare annotation was computed. [2021-11-25 19:51:16,563 INFO L854 garLoopResultBuilder]: At program point L81-3(line 81) the Hoare annotation is: (let ((.cse1 (fp.eq |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1|)) (.cse0 (fp.eq |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~x~0#1|))) (or (and (= |ULTIMATE.start_fmax_float_~y#1| |ULTIMATE.start_main_~y~0#1|) (not .cse0) .cse1) (and (= |ULTIMATE.start_fmax_float_#res#1| |ULTIMATE.start_main_~x~0#1|) |ULTIMATE.start_main_#t~short23#1| (= |ULTIMATE.start_main_~res~0#1| |ULTIMATE.start_main_~x~0#1|) (not .cse1) (= |ULTIMATE.start_main_#t~ret21#1| (_ bv0 32)) .cse0 (= |ULTIMATE.start_fmax_float_~x#1| |ULTIMATE.start_main_~x~0#1|) (not (fp.eq |ULTIMATE.start_fmax_float_~y#1| |ULTIMATE.start_fmax_float_~y#1|))))) [2021-11-25 19:51:16,563 INFO L858 garLoopResultBuilder]: For program point L81-4(line 81) no Hoare annotation was computed. [2021-11-25 19:51:16,563 INFO L858 garLoopResultBuilder]: For program point L81-6(lines 81 84) no Hoare annotation was computed. [2021-11-25 19:51:16,563 INFO L861 garLoopResultBuilder]: At program point L69(line 69) the Hoare annotation is: true [2021-11-25 19:51:16,563 INFO L858 garLoopResultBuilder]: For program point L69-1(line 69) no Hoare annotation was computed. [2021-11-25 19:51:16,564 INFO L858 garLoopResultBuilder]: For program point L69-2(line 69) no Hoare annotation was computed. [2021-11-25 19:51:16,564 INFO L854 garLoopResultBuilder]: At program point L69-3(line 69) the Hoare annotation is: (and (= |ULTIMATE.start_main_#t~ret10#1| (_ bv1 32)) |ULTIMATE.start_main_#t~short12#1| (not (fp.eq |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~x~0#1|))) [2021-11-25 19:51:16,564 INFO L858 garLoopResultBuilder]: For program point L69-4(line 69) no Hoare annotation was computed. [2021-11-25 19:51:16,564 INFO L858 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-11-25 19:51:16,564 INFO L858 garLoopResultBuilder]: For program point L69-6(line 69) no Hoare annotation was computed. [2021-11-25 19:51:16,564 INFO L858 garLoopResultBuilder]: For program point L69-7(lines 69 70) no Hoare annotation was computed. [2021-11-25 19:51:16,564 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-11-25 19:51:16,564 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-11-25 19:51:16,564 INFO L858 garLoopResultBuilder]: For program point L69-9(lines 69 85) no Hoare annotation was computed. [2021-11-25 19:51:16,564 INFO L858 garLoopResultBuilder]: For program point L69-11(lines 69 85) no Hoare annotation was computed. [2021-11-25 19:51:16,564 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 76) no Hoare annotation was computed. [2021-11-25 19:51:16,564 INFO L858 garLoopResultBuilder]: For program point L53(line 53) no Hoare annotation was computed. [2021-11-25 19:51:16,564 INFO L858 garLoopResultBuilder]: For program point L53-2(line 53) no Hoare annotation was computed. [2021-11-25 19:51:16,564 INFO L854 garLoopResultBuilder]: At program point L53-3(lines 45 54) the Hoare annotation is: (let ((.cse0 (= |ULTIMATE.start_fmax_float_~y#1| |ULTIMATE.start_main_~y~0#1|))) (or (and (fp.eq |ULTIMATE.start_fmax_float_#res#1| |ULTIMATE.start_main_~y~0#1|) .cse0 (not (fp.eq |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~x~0#1|))) (and (= |ULTIMATE.start_fmax_float_#res#1| |ULTIMATE.start_main_~x~0#1|) .cse0 (= |ULTIMATE.start_fmax_float_~x#1| |ULTIMATE.start_main_~x~0#1|) (not (fp.eq |ULTIMATE.start_fmax_float_~y#1| |ULTIMATE.start_fmax_float_~y#1|))))) [2021-11-25 19:51:16,565 INFO L858 garLoopResultBuilder]: For program point L82(line 82) no Hoare annotation was computed. [2021-11-25 19:51:16,565 INFO L854 garLoopResultBuilder]: At program point L70(line 70) the Hoare annotation is: (let ((.cse0 (not |ULTIMATE.start_main_#t~short12#1|)) (.cse1 (fp.eq |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~x~0#1|)) (.cse2 (not |ULTIMATE.start_main_#t~short16#1|))) (or (and .cse0 (= |ULTIMATE.start_main_#t~ret10#1| (_ bv1 32)) (= |ULTIMATE.start_main_#t~ret11#1| (_ bv1 32)) (not (fp.eq |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1|)) (not .cse1) .cse2) (and .cse0 (= |ULTIMATE.start_main_#t~ret10#1| (_ bv0 32)) .cse1 .cse2))) [2021-11-25 19:51:16,565 INFO L858 garLoopResultBuilder]: For program point L70-1(line 70) no Hoare annotation was computed. [2021-11-25 19:51:16,565 INFO L858 garLoopResultBuilder]: For program point L70-2(line 70) no Hoare annotation was computed. [2021-11-25 19:51:16,565 INFO L854 garLoopResultBuilder]: At program point L70-3(line 70) the Hoare annotation is: (and (not |ULTIMATE.start_main_#t~short12#1|) |ULTIMATE.start_main_#t~short15#1| (= |ULTIMATE.start_main_#t~ret13#1| (_ bv0 32)) (= |ULTIMATE.start_main_#t~ret10#1| (_ bv0 32)) (fp.eq |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~x~0#1|) (not |ULTIMATE.start_main_#t~short16#1|)) [2021-11-25 19:51:16,567 INFO L858 garLoopResultBuilder]: For program point L70-4(line 70) no Hoare annotation was computed. [2021-11-25 19:51:16,567 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-11-25 19:51:16,567 INFO L858 garLoopResultBuilder]: For program point L70-6(line 70) no Hoare annotation was computed. [2021-11-25 19:51:16,567 INFO L861 garLoopResultBuilder]: At program point L87(lines 59 88) the Hoare annotation is: true [2021-11-25 19:51:16,567 INFO L854 garLoopResultBuilder]: At program point L50(line 50) the Hoare annotation is: (let ((.cse0 (= |ULTIMATE.start_fmax_float_~x#1| |ULTIMATE.start_main_~x~0#1|))) (or (and (= |ULTIMATE.start_fmax_float_~y#1| |ULTIMATE.start_main_~y~0#1|) .cse0 (not (fp.eq |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~x~0#1|))) (and (not (fp.eq |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1|)) .cse0 (not (fp.eq |ULTIMATE.start_fmax_float_~y#1| |ULTIMATE.start_fmax_float_~y#1|))))) [2021-11-25 19:51:16,568 INFO L858 garLoopResultBuilder]: For program point L50-1(lines 50 52) no Hoare annotation was computed. [2021-11-25 19:51:16,568 INFO L854 garLoopResultBuilder]: At program point L46(line 46) the Hoare annotation is: (let ((.cse0 (= |ULTIMATE.start_fmax_float_~y#1| |ULTIMATE.start_main_~y~0#1|)) (.cse2 (= |ULTIMATE.start_fmax_float_~x#1| |ULTIMATE.start_main_~x~0#1|)) (.cse1 (fp.eq |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~x~0#1|)) (.cse3 (fp.eq |ULTIMATE.start_fmax_float_~y#1| |ULTIMATE.start_fmax_float_~y#1|))) (or (and .cse0 .cse1 .cse2 (not .cse3)) (and .cse0 .cse2 (not .cse1) .cse3))) [2021-11-25 19:51:16,568 INFO L858 garLoopResultBuilder]: For program point L46-1(lines 46 48) no Hoare annotation was computed. [2021-11-25 19:51:16,568 INFO L854 garLoopResultBuilder]: At program point L75(line 75) the Hoare annotation is: (let ((.cse0 (= |ULTIMATE.start_fmax_float_~y#1| |ULTIMATE.start_main_~y~0#1|))) (or (and (= |ULTIMATE.start_fmax_float_#res#1| |ULTIMATE.start_main_~x~0#1|) (= |ULTIMATE.start_main_~res~0#1| |ULTIMATE.start_main_~x~0#1|) .cse0 (= |ULTIMATE.start_fmax_float_~x#1| |ULTIMATE.start_main_~x~0#1|) (not (fp.eq |ULTIMATE.start_fmax_float_~y#1| |ULTIMATE.start_fmax_float_~y#1|))) (and (fp.eq |ULTIMATE.start_fmax_float_#res#1| |ULTIMATE.start_main_~y~0#1|) (fp.eq |ULTIMATE.start_main_~res~0#1| |ULTIMATE.start_main_~y~0#1|) .cse0 (not (fp.eq |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~x~0#1|))))) [2021-11-25 19:51:16,568 INFO L858 garLoopResultBuilder]: For program point L75-1(line 75) no Hoare annotation was computed. [2021-11-25 19:51:16,568 INFO L858 garLoopResultBuilder]: For program point L75-2(line 75) no Hoare annotation was computed. [2021-11-25 19:51:16,568 INFO L854 garLoopResultBuilder]: At program point L75-3(line 75) the Hoare annotation is: (let ((.cse3 (fp.eq |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1|))) (let ((.cse4 (not .cse3))) (let ((.cse0 (or (fp.eq |ULTIMATE.start_fmax_float_#res#1| |ULTIMATE.start_main_~y~0#1|) .cse4)) (.cse1 (= |ULTIMATE.start_fmax_float_~y#1| |ULTIMATE.start_main_~y~0#1|)) (.cse2 (or (fp.eq |ULTIMATE.start_main_~res~0#1| |ULTIMATE.start_main_~y~0#1|) .cse4))) (or (and (= |ULTIMATE.start_fmax_float_#res#1| |ULTIMATE.start_main_~x~0#1|) .cse0 |ULTIMATE.start_main_#t~short20#1| (= |ULTIMATE.start_main_~res~0#1| |ULTIMATE.start_main_~x~0#1|) .cse1 (= |ULTIMATE.start_fmax_float_~x#1| |ULTIMATE.start_main_~x~0#1|) (not (fp.eq |ULTIMATE.start_fmax_float_~y#1| |ULTIMATE.start_fmax_float_~y#1|)) .cse2) (and .cse0 |ULTIMATE.start_main_#t~short20#1| .cse1 (= |ULTIMATE.start_main_#t~ret18#1| (_ bv1 32)) (not (fp.eq |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~x~0#1|)) .cse2 .cse3))))) [2021-11-25 19:51:16,568 INFO L858 garLoopResultBuilder]: For program point L75-4(line 75) no Hoare annotation was computed. [2021-11-25 19:51:16,568 INFO L858 garLoopResultBuilder]: For program point L75-6(lines 75 78) no Hoare annotation was computed. [2021-11-25 19:51:16,569 INFO L858 garLoopResultBuilder]: For program point L76(line 76) no Hoare annotation was computed. [2021-11-25 19:51:16,569 INFO L858 garLoopResultBuilder]: For program point L33(lines 33 42) no Hoare annotation was computed. [2021-11-25 19:51:16,569 INFO L858 garLoopResultBuilder]: For program point __fpclassify_floatFINAL(lines 22 43) no Hoare annotation was computed. [2021-11-25 19:51:16,569 INFO L858 garLoopResultBuilder]: For program point L25-1(lines 25 29) no Hoare annotation was computed. [2021-11-25 19:51:16,569 INFO L854 garLoopResultBuilder]: At program point L25-2(lines 25 29) the Hoare annotation is: (= |__fpclassify_float_#in~x| __fpclassify_float_~x) [2021-11-25 19:51:16,570 INFO L858 garLoopResultBuilder]: For program point L25-3(lines 22 43) no Hoare annotation was computed. [2021-11-25 19:51:16,570 INFO L858 garLoopResultBuilder]: For program point L36(lines 36 42) no Hoare annotation was computed. [2021-11-25 19:51:16,570 INFO L861 garLoopResultBuilder]: At program point __fpclassify_floatENTRY(lines 22 43) the Hoare annotation is: true [2021-11-25 19:51:16,570 INFO L858 garLoopResultBuilder]: For program point __fpclassify_floatEXIT(lines 22 43) no Hoare annotation was computed. [2021-11-25 19:51:16,571 INFO L858 garLoopResultBuilder]: For program point L39(lines 39 42) no Hoare annotation was computed. [2021-11-25 19:51:16,575 INFO L732 BasicCegarLoop]: Path program 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] [2021-11-25 19:51:16,576 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-25 19:51:16,606 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.11 07:51:16 BoogieIcfgContainer [2021-11-25 19:51:16,606 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-25 19:51:16,607 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-25 19:51:16,607 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-25 19:51:16,607 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-25 19:51:16,608 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 07:49:56" (3/4) ... [2021-11-25 19:51:16,612 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-11-25 19:51:16,617 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure isnan_float [2021-11-25 19:51:16,618 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __fpclassify_float [2021-11-25 19:51:16,627 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 18 nodes and edges [2021-11-25 19:51:16,628 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2021-11-25 19:51:16,628 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-11-25 19:51:16,629 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-11-25 19:51:16,667 WARN L220 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: \old(x) == x [2021-11-25 19:51:16,667 WARN L220 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: ((~fp.eq~FLOAT(\result, y) && y == y) && !~fp.eq~FLOAT(x, x)) || (((\result == x && y == y) && x == x) && !~fp.eq~FLOAT(y, y)) [2021-11-25 19:51:16,700 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/witness.graphml [2021-11-25 19:51:16,700 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-25 19:51:16,701 INFO L158 Benchmark]: Toolchain (without parser) took 81037.93ms. Allocated memory was 75.5MB in the beginning and 159.4MB in the end (delta: 83.9MB). Free memory was 56.3MB in the beginning and 121.0MB in the end (delta: -64.7MB). Peak memory consumption was 20.0MB. Max. memory is 16.1GB. [2021-11-25 19:51:16,706 INFO L158 Benchmark]: CDTParser took 0.31ms. Allocated memory is still 75.5MB. Free memory was 54.8MB in the beginning and 54.7MB in the end (delta: 87.2kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-25 19:51:16,706 INFO L158 Benchmark]: CACSL2BoogieTranslator took 387.05ms. Allocated memory is still 75.5MB. Free memory was 56.1MB in the beginning and 57.0MB in the end (delta: -953.3kB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-11-25 19:51:16,707 INFO L158 Benchmark]: Boogie Procedure Inliner took 48.74ms. Allocated memory is still 75.5MB. Free memory was 57.0MB in the beginning and 55.4MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-25 19:51:16,708 INFO L158 Benchmark]: Boogie Preprocessor took 38.83ms. Allocated memory is still 75.5MB. Free memory was 55.4MB in the beginning and 53.9MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-25 19:51:16,708 INFO L158 Benchmark]: RCFGBuilder took 472.75ms. Allocated memory is still 75.5MB. Free memory was 53.6MB in the beginning and 41.0MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-11-25 19:51:16,712 INFO L158 Benchmark]: TraceAbstraction took 79989.59ms. Allocated memory was 75.5MB in the beginning and 159.4MB in the end (delta: 83.9MB). Free memory was 40.7MB in the beginning and 126.2MB in the end (delta: -85.5MB). Peak memory consumption was 82.9MB. Max. memory is 16.1GB. [2021-11-25 19:51:16,714 INFO L158 Benchmark]: Witness Printer took 93.50ms. Allocated memory is still 159.4MB. Free memory was 125.2MB in the beginning and 121.0MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-11-25 19:51:16,716 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31ms. Allocated memory is still 75.5MB. Free memory was 54.8MB in the beginning and 54.7MB in the end (delta: 87.2kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 387.05ms. Allocated memory is still 75.5MB. Free memory was 56.1MB in the beginning and 57.0MB in the end (delta: -953.3kB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 48.74ms. Allocated memory is still 75.5MB. Free memory was 57.0MB in the beginning and 55.4MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 38.83ms. Allocated memory is still 75.5MB. Free memory was 55.4MB in the beginning and 53.9MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 472.75ms. Allocated memory is still 75.5MB. Free memory was 53.6MB in the beginning and 41.0MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 79989.59ms. Allocated memory was 75.5MB in the beginning and 159.4MB in the end (delta: 83.9MB). Free memory was 40.7MB in the beginning and 126.2MB in the end (delta: -85.5MB). Peak memory consumption was 82.9MB. Max. memory is 16.1GB. * Witness Printer took 93.50ms. Allocated memory is still 159.4MB. Free memory was 125.2MB in the beginning and 121.0MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 76]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 82]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 55 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 79.9s, OverallIterations: 30, TraceHistogramMax: 6, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.1s, AutomataDifference: 26.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 4.9s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 1 mSolverCounterUnknown, 1527 SdHoareTripleChecker+Valid, 16.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1436 mSDsluCounter, 11392 SdHoareTripleChecker+Invalid, 14.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 228 IncrementalHoareTripleChecker+Unchecked, 9499 mSDsCounter, 542 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 5595 IncrementalHoareTripleChecker+Invalid, 6366 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 542 mSolverCounterUnsat, 1893 mSDtfsCounter, 5595 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 3651 GetRequests, 3199 SyntacticMatches, 4 SemanticMatches, 448 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 2087 ImplicationChecksByTransitivity, 17.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=112occurred in iteration=15, InterpolantAutomatonStates: 281, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.5s AutomataMinimizationTime, 30 MinimizatonAttempts, 338 StatesRemovedByMinimization, 22 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 15 LocationsWithAnnotation, 169 PreInvPairs, 207 NumberOfFragments, 306 HoareAnnotationTreeSize, 169 FomulaSimplifications, 288 FormulaSimplificationTreeSizeReduction, 1.4s HoareSimplificationTime, 15 FomulaSimplificationsInter, 196316 FormulaSimplificationTreeSizeReductionInter, 3.5s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.6s SsaConstructionTime, 4.4s SatisfiabilityAnalysisTime, 30.3s InterpolantComputationTime, 2366 NumberOfCodeBlocks, 2366 NumberOfCodeBlocksAsserted, 48 NumberOfCheckSat, 3424 ConstructedInterpolants, 10 QuantifiedInterpolants, 10481 SizeOfPredicates, 292 NumberOfNonLiveVariables, 5455 ConjunctsInSsa, 571 ConjunctsInUnsatCore, 70 InterpolantComputations, 24 PerfectInterpolantSequences, 1833/2085 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 2 specifications checked. All of them hold - InvariantResult [Line: 45]: Loop Invariant Derived loop invariant: ((~fp.eq~FLOAT(\result, y) && y == y) && !~fp.eq~FLOAT(x, x)) || (((\result == x && y == y) && x == x) && !~fp.eq~FLOAT(y, y)) - InvariantResult [Line: 59]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 25]: Loop Invariant Derived loop invariant: \old(x) == x RESULT: Ultimate proved your program to be correct! [2021-11-25 19:51:16,789 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f521d0fe-485b-4a7f-a253-f634f6d3d39d/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE