./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/float-newlib/double_req_bl_1232b.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_cdc39e3f-9471-4815-af92-a6030d746a03/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdc39e3f-9471-4815-af92-a6030d746a03/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_cdc39e3f-9471-4815-af92-a6030d746a03/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdc39e3f-9471-4815-af92-a6030d746a03/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-newlib/double_req_bl_1232b.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdc39e3f-9471-4815-af92-a6030d746a03/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_cdc39e3f-9471-4815-af92-a6030d746a03/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 e29f062842798044f4f77e299bc6043cf6e874a22c0b9b512a8e0e54ddd042d9 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 20:02:35,675 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 20:02:35,678 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 20:02:35,732 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 20:02:35,733 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 20:02:35,734 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 20:02:35,736 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 20:02:35,738 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 20:02:35,740 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 20:02:35,741 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 20:02:35,742 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 20:02:35,744 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 20:02:35,744 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 20:02:35,746 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 20:02:35,747 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 20:02:35,749 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 20:02:35,750 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 20:02:35,751 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 20:02:35,754 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 20:02:35,757 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 20:02:35,759 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 20:02:35,761 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 20:02:35,762 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 20:02:35,763 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 20:02:35,767 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 20:02:35,768 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 20:02:35,768 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 20:02:35,769 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 20:02:35,770 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 20:02:35,771 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 20:02:35,771 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 20:02:35,772 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 20:02:35,773 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 20:02:35,774 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 20:02:35,776 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 20:02:35,776 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 20:02:35,777 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 20:02:35,778 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 20:02:35,778 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 20:02:35,779 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 20:02:35,780 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 20:02:35,781 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdc39e3f-9471-4815-af92-a6030d746a03/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-25 20:02:35,820 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 20:02:35,821 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 20:02:35,821 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 20:02:35,822 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 20:02:35,822 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 20:02:35,823 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 20:02:35,823 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 20:02:35,823 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 20:02:35,823 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 20:02:35,823 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 20:02:35,824 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 20:02:35,824 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 20:02:35,824 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 20:02:35,824 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 20:02:35,824 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 20:02:35,824 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 20:02:35,825 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 20:02:35,825 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 20:02:35,825 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 20:02:35,826 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 20:02:35,826 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 20:02:35,826 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 20:02:35,826 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 20:02:35,826 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 20:02:35,827 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 20:02:35,827 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 20:02:35,827 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 20:02:35,827 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 20:02:35,827 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 20:02:35,828 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 20:02:35,828 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 20:02:35,828 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 20:02:35,828 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 20:02:35,828 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 20:02:35,828 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 20:02:35,829 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 20:02:35,829 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 20:02:35,829 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 20:02:35,829 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 20:02:35,829 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 20:02:35,829 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 20:02:35,830 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_cdc39e3f-9471-4815-af92-a6030d746a03/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdc39e3f-9471-4815-af92-a6030d746a03/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e29f062842798044f4f77e299bc6043cf6e874a22c0b9b512a8e0e54ddd042d9 [2021-11-25 20:02:36,090 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 20:02:36,110 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 20:02:36,112 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 20:02:36,113 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 20:02:36,114 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 20:02:36,115 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdc39e3f-9471-4815-af92-a6030d746a03/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/float-newlib/double_req_bl_1232b.c [2021-11-25 20:02:36,175 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdc39e3f-9471-4815-af92-a6030d746a03/bin/utaipan-eEHZpOm5b7/data/1a2aabb6b/f654315ffe694e21903a49caeae2d7eb/FLAG628a13eae [2021-11-25 20:02:36,666 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 20:02:36,667 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdc39e3f-9471-4815-af92-a6030d746a03/sv-benchmarks/c/float-newlib/double_req_bl_1232b.c [2021-11-25 20:02:36,673 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdc39e3f-9471-4815-af92-a6030d746a03/bin/utaipan-eEHZpOm5b7/data/1a2aabb6b/f654315ffe694e21903a49caeae2d7eb/FLAG628a13eae [2021-11-25 20:02:37,158 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdc39e3f-9471-4815-af92-a6030d746a03/bin/utaipan-eEHZpOm5b7/data/1a2aabb6b/f654315ffe694e21903a49caeae2d7eb [2021-11-25 20:02:37,160 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 20:02:37,162 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 20:02:37,167 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 20:02:37,167 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 20:02:37,170 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 20:02:37,172 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:02:37" (1/1) ... [2021-11-25 20:02:37,174 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@77884853 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:02:37, skipping insertion in model container [2021-11-25 20:02:37,175 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:02:37" (1/1) ... [2021-11-25 20:02:37,181 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 20:02:37,204 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 20:02:37,383 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_cdc39e3f-9471-4815-af92-a6030d746a03/sv-benchmarks/c/float-newlib/double_req_bl_1232b.c[1958,1971] [2021-11-25 20:02:37,386 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 20:02:37,393 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 20:02:37,417 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_cdc39e3f-9471-4815-af92-a6030d746a03/sv-benchmarks/c/float-newlib/double_req_bl_1232b.c[1958,1971] [2021-11-25 20:02:37,418 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 20:02:37,431 INFO L208 MainTranslator]: Completed translation [2021-11-25 20:02:37,432 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:02:37 WrapperNode [2021-11-25 20:02:37,432 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 20:02:37,433 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 20:02:37,433 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 20:02:37,434 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 20:02:37,441 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:02:37" (1/1) ... [2021-11-25 20:02:37,449 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:02:37" (1/1) ... [2021-11-25 20:02:37,467 INFO L137 Inliner]: procedures = 19, calls = 20, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 67 [2021-11-25 20:02:37,467 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 20:02:37,468 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 20:02:37,468 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 20:02:37,469 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 20:02:37,476 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:02:37" (1/1) ... [2021-11-25 20:02:37,477 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:02:37" (1/1) ... [2021-11-25 20:02:37,479 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:02:37" (1/1) ... [2021-11-25 20:02:37,479 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:02:37" (1/1) ... [2021-11-25 20:02:37,485 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:02:37" (1/1) ... [2021-11-25 20:02:37,489 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:02:37" (1/1) ... [2021-11-25 20:02:37,491 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:02:37" (1/1) ... [2021-11-25 20:02:37,493 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 20:02:37,494 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 20:02:37,494 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 20:02:37,494 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 20:02:37,495 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:02:37" (1/1) ... [2021-11-25 20:02:37,506 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 20:02:37,517 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdc39e3f-9471-4815-af92-a6030d746a03/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:02:37,544 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdc39e3f-9471-4815-af92-a6030d746a03/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 20:02:37,570 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdc39e3f-9471-4815-af92-a6030d746a03/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 20:02:37,586 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 20:02:37,587 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 20:02:37,587 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-25 20:02:37,587 INFO L130 BoogieDeclarations]: Found specification of procedure __fpclassify_double [2021-11-25 20:02:37,587 INFO L138 BoogieDeclarations]: Found implementation of procedure __fpclassify_double [2021-11-25 20:02:37,588 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2021-11-25 20:02:37,588 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 20:02:37,588 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 20:02:37,588 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-25 20:02:37,588 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-25 20:02:37,683 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 20:02:37,685 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 20:02:37,903 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 20:02:37,977 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 20:02:37,981 INFO L301 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-25 20:02:37,983 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:02:37 BoogieIcfgContainer [2021-11-25 20:02:37,983 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 20:02:37,984 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 20:02:37,984 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 20:02:37,986 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 20:02:37,987 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 08:02:37" (1/3) ... [2021-11-25 20:02:37,987 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74220264 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:02:37, skipping insertion in model container [2021-11-25 20:02:37,987 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:02:37" (2/3) ... [2021-11-25 20:02:37,987 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74220264 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:02:37, skipping insertion in model container [2021-11-25 20:02:37,988 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:02:37" (3/3) ... [2021-11-25 20:02:37,988 INFO L111 eAbstractionObserver]: Analyzing ICFG double_req_bl_1232b.c [2021-11-25 20:02:37,993 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 20:02:37,994 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-25 20:02:38,033 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 20:02:38,039 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-25 20:02:38,040 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-25 20:02:38,055 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 16 states have (on average 1.5) internal successors, (24), 17 states have internal predecessors, (24), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-25 20:02:38,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-25 20:02:38,060 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:02:38,060 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:02:38,061 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:02:38,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:02:38,066 INFO L85 PathProgramCache]: Analyzing trace with hash 175486163, now seen corresponding path program 1 times [2021-11-25 20:02:38,076 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:02:38,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116402876] [2021-11-25 20:02:38,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:02:38,077 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:02:38,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:02:38,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:02:38,201 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:02:38,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116402876] [2021-11-25 20:02:38,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116402876] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:02:38,203 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:02:38,203 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 20:02:38,204 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932030550] [2021-11-25 20:02:38,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:02:38,209 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-25 20:02:38,209 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:02:38,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-25 20:02:38,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-25 20:02:38,239 INFO L87 Difference]: Start difference. First operand has 21 states, 16 states have (on average 1.5) internal successors, (24), 17 states have internal predecessors, (24), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-25 20:02:38,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:02:38,271 INFO L93 Difference]: Finished difference Result 40 states and 55 transitions. [2021-11-25 20:02:38,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-25 20:02:38,277 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-11-25 20:02:38,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:02:38,283 INFO L225 Difference]: With dead ends: 40 [2021-11-25 20:02:38,284 INFO L226 Difference]: Without dead ends: 19 [2021-11-25 20:02:38,286 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 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 20:02:38,298 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 18 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 20:02:38,299 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 18 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 20:02:38,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-11-25 20:02:38,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-11-25 20:02:38,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 15 states have internal predecessors, (17), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-25 20:02:38,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2021-11-25 20:02:38,354 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 12 [2021-11-25 20:02:38,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:02:38,355 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2021-11-25 20:02:38,355 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-25 20:02:38,355 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2021-11-25 20:02:38,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-25 20:02:38,357 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:02:38,357 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:02:38,357 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 20:02:38,358 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:02:38,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:02:38,359 INFO L85 PathProgramCache]: Analyzing trace with hash 574417458, now seen corresponding path program 1 times [2021-11-25 20:02:38,359 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:02:38,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756690400] [2021-11-25 20:02:38,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:02:38,360 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:02:38,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-25 20:02:38,415 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-25 20:02:38,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-25 20:02:38,525 INFO L133 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-11-25 20:02:38,525 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-11-25 20:02:38,527 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-25 20:02:38,529 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-25 20:02:38,534 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1] [2021-11-25 20:02:38,536 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-25 20:02:38,561 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.11 08:02:38 BoogieIcfgContainer [2021-11-25 20:02:38,561 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-25 20:02:38,562 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-25 20:02:38,562 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-25 20:02:38,562 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-25 20:02:38,563 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:02:37" (3/4) ... [2021-11-25 20:02:38,565 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-11-25 20:02:38,565 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-25 20:02:38,566 INFO L158 Benchmark]: Toolchain (without parser) took 1404.18ms. Allocated memory was 94.4MB in the beginning and 115.3MB in the end (delta: 21.0MB). Free memory was 52.8MB in the beginning and 80.5MB in the end (delta: -27.7MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-25 20:02:38,567 INFO L158 Benchmark]: CDTParser took 0.22ms. Allocated memory is still 94.4MB. Free memory was 69.4MB in the beginning and 69.3MB in the end (delta: 45.9kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-25 20:02:38,567 INFO L158 Benchmark]: CACSL2BoogieTranslator took 265.63ms. Allocated memory is still 94.4MB. Free memory was 52.6MB in the beginning and 68.9MB in the end (delta: -16.4MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-11-25 20:02:38,568 INFO L158 Benchmark]: Boogie Procedure Inliner took 34.42ms. Allocated memory is still 94.4MB. Free memory was 68.7MB in the beginning and 67.1MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-25 20:02:38,569 INFO L158 Benchmark]: Boogie Preprocessor took 24.73ms. Allocated memory is still 94.4MB. Free memory was 67.1MB in the beginning and 65.9MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-25 20:02:38,569 INFO L158 Benchmark]: RCFGBuilder took 489.03ms. Allocated memory is still 94.4MB. Free memory was 65.9MB in the beginning and 51.3MB in the end (delta: 14.6MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2021-11-25 20:02:38,570 INFO L158 Benchmark]: TraceAbstraction took 576.93ms. Allocated memory was 94.4MB in the beginning and 115.3MB in the end (delta: 21.0MB). Free memory was 50.6MB in the beginning and 81.0MB in the end (delta: -30.5MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-25 20:02:38,570 INFO L158 Benchmark]: Witness Printer took 3.75ms. Allocated memory is still 115.3MB. Free memory was 81.0MB in the beginning and 80.5MB in the end (delta: 535.4kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-25 20:02:38,574 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22ms. Allocated memory is still 94.4MB. Free memory was 69.4MB in the beginning and 69.3MB in the end (delta: 45.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 265.63ms. Allocated memory is still 94.4MB. Free memory was 52.6MB in the beginning and 68.9MB in the end (delta: -16.4MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 34.42ms. Allocated memory is still 94.4MB. Free memory was 68.7MB in the beginning and 67.1MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 24.73ms. Allocated memory is still 94.4MB. Free memory was 67.1MB in the beginning and 65.9MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 489.03ms. Allocated memory is still 94.4MB. Free memory was 65.9MB in the beginning and 51.3MB in the end (delta: 14.6MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * TraceAbstraction took 576.93ms. Allocated memory was 94.4MB in the beginning and 115.3MB in the end (delta: 21.0MB). Free memory was 50.6MB in the beginning and 81.0MB in the end (delta: -30.5MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 3.75ms. Allocated memory is still 115.3MB. Free memory was 81.0MB in the beginning and 80.5MB in the end (delta: 535.4kB). 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: 82]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of someBinaryDOUBLEComparisonOperation at line 81, overapproximation of someUnaryDOUBLEoperation at line 76. Possible FailurePath: [L76] double x = -0.0; [L77] double y = 0.0; [L78] CALL, EXPR fmin_double(x, y) [L48] CALL, EXPR __fpclassify_double(x) VAL [\old(x)=2147483648] [L21] __uint32_t msw, lsw; VAL [\old(x)=2147483648, x=2147483648] [L24] ieee_double_shape_type ew_u; [L25] ew_u.value = (x) [L26] EXPR ew_u.parts.msw [L26] (msw) = ew_u.parts.msw [L27] EXPR ew_u.parts.lsw [L27] (lsw) = ew_u.parts.lsw [L30-L31] COND FALSE !((msw == 0x00000000 && lsw == 0x00000000) || (msw == 0x80000000 && lsw == 0x00000000)) [L33-L34] COND FALSE !((msw >= 0x00100000 && msw <= 0x7fefffff) || (msw >= 0x80100000 && msw <= 0xffefffff)) [L36-L37] COND FALSE !(( msw <= 0x000fffff) || (msw >= 0x80000000 && msw <= 0x800fffff)) [L40-L41] COND FALSE !((msw == 0x7ff00000 && lsw == 0x00000000) || (msw == 0xfff00000 && lsw == 0x00000000)) [L44] return 0; [L48] RET, EXPR __fpclassify_double(x) VAL [\old(x)=2147483648, \old(y)=0, __fpclassify_double(x)=0, x=2147483648, y=0] [L48] COND TRUE __fpclassify_double(x) == 0 [L49] return y; VAL [\old(x)=2147483648, \old(y)=0, \result=0, x=2147483648, y=0] [L78] RET, EXPR fmin_double(x, y) [L78] double res = fmin_double(x, y); [L81] EXPR res == -0.0 && __signbit_double(res) == 1 VAL [res=0, res == -0.0 && __signbit_double(res) == 1=0, x=2147483648, y=0] [L81] COND TRUE !(res == -0.0 && __signbit_double(res) == 1) [L82] reach_error() VAL [res=0, x=2147483648, y=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 21 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 0.5s, OverallIterations: 2, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 0 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 0 mSDsluCounter, 18 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 0 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 5 IncrementalHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 0 mSolverCounterUnsat, 18 mSDtfsCounter, 5 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=21occurred in iteration=0, InterpolantAutomatonStates: 2, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 25 NumberOfCodeBlocks, 25 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 11 ConstructedInterpolants, 0 QuantifiedInterpolants, 11 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 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 20:02:38,622 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdc39e3f-9471-4815-af92-a6030d746a03/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_cdc39e3f-9471-4815-af92-a6030d746a03/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdc39e3f-9471-4815-af92-a6030d746a03/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_cdc39e3f-9471-4815-af92-a6030d746a03/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdc39e3f-9471-4815-af92-a6030d746a03/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-newlib/double_req_bl_1232b.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdc39e3f-9471-4815-af92-a6030d746a03/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_cdc39e3f-9471-4815-af92-a6030d746a03/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 e29f062842798044f4f77e299bc6043cf6e874a22c0b9b512a8e0e54ddd042d9 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 20:02:40,961 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 20:02:40,963 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 20:02:41,000 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 20:02:41,001 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 20:02:41,005 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 20:02:41,007 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 20:02:41,011 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 20:02:41,014 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 20:02:41,021 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 20:02:41,023 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 20:02:41,024 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 20:02:41,025 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 20:02:41,027 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 20:02:41,029 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 20:02:41,033 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 20:02:41,035 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 20:02:41,036 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 20:02:41,038 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 20:02:41,045 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 20:02:41,047 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 20:02:41,048 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 20:02:41,051 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 20:02:41,052 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 20:02:41,061 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 20:02:41,064 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 20:02:41,065 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 20:02:41,066 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 20:02:41,066 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 20:02:41,067 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 20:02:41,067 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 20:02:41,068 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 20:02:41,069 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 20:02:41,070 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 20:02:41,079 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 20:02:41,079 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 20:02:41,080 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 20:02:41,080 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 20:02:41,080 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 20:02:41,081 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 20:02:41,082 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 20:02:41,084 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdc39e3f-9471-4815-af92-a6030d746a03/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-25 20:02:41,124 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 20:02:41,125 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 20:02:41,126 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 20:02:41,126 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 20:02:41,127 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 20:02:41,127 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 20:02:41,127 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 20:02:41,127 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 20:02:41,127 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 20:02:41,128 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 20:02:41,129 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 20:02:41,129 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 20:02:41,130 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 20:02:41,130 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 20:02:41,130 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 20:02:41,131 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 20:02:41,131 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 20:02:41,131 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 20:02:41,131 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 20:02:41,131 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-25 20:02:41,132 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-25 20:02:41,132 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-25 20:02:41,132 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 20:02:41,132 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 20:02:41,132 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 20:02:41,132 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 20:02:41,133 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 20:02:41,133 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-25 20:02:41,133 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 20:02:41,133 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 20:02:41,133 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 20:02:41,134 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 20:02:41,134 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 20:02:41,134 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-25 20:02:41,135 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-25 20:02:41,135 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 20:02:41,135 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 20:02:41,135 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 20:02:41,135 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_cdc39e3f-9471-4815-af92-a6030d746a03/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdc39e3f-9471-4815-af92-a6030d746a03/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e29f062842798044f4f77e299bc6043cf6e874a22c0b9b512a8e0e54ddd042d9 [2021-11-25 20:02:41,572 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 20:02:41,597 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 20:02:41,601 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 20:02:41,602 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 20:02:41,603 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 20:02:41,604 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdc39e3f-9471-4815-af92-a6030d746a03/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/float-newlib/double_req_bl_1232b.c [2021-11-25 20:02:41,678 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdc39e3f-9471-4815-af92-a6030d746a03/bin/utaipan-eEHZpOm5b7/data/61037e695/6cf7fa2636f647c092857639298f1857/FLAGa5719633a [2021-11-25 20:02:42,232 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 20:02:42,233 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdc39e3f-9471-4815-af92-a6030d746a03/sv-benchmarks/c/float-newlib/double_req_bl_1232b.c [2021-11-25 20:02:42,243 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdc39e3f-9471-4815-af92-a6030d746a03/bin/utaipan-eEHZpOm5b7/data/61037e695/6cf7fa2636f647c092857639298f1857/FLAGa5719633a [2021-11-25 20:02:42,578 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdc39e3f-9471-4815-af92-a6030d746a03/bin/utaipan-eEHZpOm5b7/data/61037e695/6cf7fa2636f647c092857639298f1857 [2021-11-25 20:02:42,581 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 20:02:42,582 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 20:02:42,584 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 20:02:42,584 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 20:02:42,587 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 20:02:42,588 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:02:42" (1/1) ... [2021-11-25 20:02:42,589 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@42f2969e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:02:42, skipping insertion in model container [2021-11-25 20:02:42,589 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:02:42" (1/1) ... [2021-11-25 20:02:42,596 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 20:02:42,610 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 20:02:42,808 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_cdc39e3f-9471-4815-af92-a6030d746a03/sv-benchmarks/c/float-newlib/double_req_bl_1232b.c[1958,1971] [2021-11-25 20:02:42,810 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 20:02:42,821 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 20:02:42,846 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_cdc39e3f-9471-4815-af92-a6030d746a03/sv-benchmarks/c/float-newlib/double_req_bl_1232b.c[1958,1971] [2021-11-25 20:02:42,847 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 20:02:42,864 INFO L208 MainTranslator]: Completed translation [2021-11-25 20:02:42,864 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:02:42 WrapperNode [2021-11-25 20:02:42,864 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 20:02:42,868 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 20:02:42,868 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 20:02:42,868 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 20:02:42,875 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:02:42" (1/1) ... [2021-11-25 20:02:42,896 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:02:42" (1/1) ... [2021-11-25 20:02:42,924 INFO L137 Inliner]: procedures = 22, calls = 20, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 65 [2021-11-25 20:02:42,924 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 20:02:42,925 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 20:02:42,926 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 20:02:42,926 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 20:02:42,934 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:02:42" (1/1) ... [2021-11-25 20:02:42,934 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:02:42" (1/1) ... [2021-11-25 20:02:42,945 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:02:42" (1/1) ... [2021-11-25 20:02:42,945 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:02:42" (1/1) ... [2021-11-25 20:02:42,965 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:02:42" (1/1) ... [2021-11-25 20:02:42,969 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:02:42" (1/1) ... [2021-11-25 20:02:42,971 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:02:42" (1/1) ... [2021-11-25 20:02:42,986 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 20:02:42,987 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 20:02:42,987 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 20:02:42,987 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 20:02:42,988 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:02:42" (1/1) ... [2021-11-25 20:02:42,998 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 20:02:43,008 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdc39e3f-9471-4815-af92-a6030d746a03/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:02:43,022 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdc39e3f-9471-4815-af92-a6030d746a03/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 20:02:43,048 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdc39e3f-9471-4815-af92-a6030d746a03/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 20:02:43,073 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 20:02:43,073 INFO L130 BoogieDeclarations]: Found specification of procedure write~intFLOATTYPE8 [2021-11-25 20:02:43,073 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-25 20:02:43,074 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-25 20:02:43,074 INFO L130 BoogieDeclarations]: Found specification of procedure __fpclassify_double [2021-11-25 20:02:43,074 INFO L138 BoogieDeclarations]: Found implementation of procedure __fpclassify_double [2021-11-25 20:02:43,074 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-25 20:02:43,074 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 20:02:43,074 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 20:02:43,075 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-25 20:02:43,182 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 20:02:43,184 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 20:02:43,438 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 20:02:43,444 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 20:02:43,445 INFO L301 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-25 20:02:43,446 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:02:43 BoogieIcfgContainer [2021-11-25 20:02:43,446 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 20:02:43,448 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 20:02:43,448 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 20:02:43,451 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 20:02:43,451 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 08:02:42" (1/3) ... [2021-11-25 20:02:43,452 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@397a07e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:02:43, skipping insertion in model container [2021-11-25 20:02:43,452 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:02:42" (2/3) ... [2021-11-25 20:02:43,452 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@397a07e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:02:43, skipping insertion in model container [2021-11-25 20:02:43,452 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:02:43" (3/3) ... [2021-11-25 20:02:43,454 INFO L111 eAbstractionObserver]: Analyzing ICFG double_req_bl_1232b.c [2021-11-25 20:02:43,458 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 20:02:43,459 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-25 20:02:43,556 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 20:02:43,563 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-25 20:02:43,563 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-25 20:02:43,579 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 24 states have (on average 1.5833333333333333) internal successors, (38), 25 states have internal predecessors, (38), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-25 20:02:43,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-25 20:02:43,584 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:02:43,584 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:02:43,585 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:02:43,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:02:43,590 INFO L85 PathProgramCache]: Analyzing trace with hash 1130952206, now seen corresponding path program 1 times [2021-11-25 20:02:43,602 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 20:02:43,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1481941604] [2021-11-25 20:02:43,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:02:43,605 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 20:02:43,605 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdc39e3f-9471-4815-af92-a6030d746a03/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 20:02:43,611 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdc39e3f-9471-4815-af92-a6030d746a03/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 20:02:43,649 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdc39e3f-9471-4815-af92-a6030d746a03/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-25 20:02:43,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:02:43,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-25 20:02:43,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:02:43,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:02:43,779 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:02:43,780 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 20:02:43,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1481941604] [2021-11-25 20:02:43,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1481941604] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:02:43,782 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:02:43,782 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 20:02:43,784 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458471232] [2021-11-25 20:02:43,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:02:43,789 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-25 20:02:43,789 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 20:02:43,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-25 20:02:43,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-25 20:02:43,827 INFO L87 Difference]: Start difference. First operand has 29 states, 24 states have (on average 1.5833333333333333) internal successors, (38), 25 states have internal predecessors, (38), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-25 20:02:43,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:02:43,852 INFO L93 Difference]: Finished difference Result 55 states and 82 transitions. [2021-11-25 20:02:43,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-25 20:02:43,854 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2021-11-25 20:02:43,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:02:43,861 INFO L225 Difference]: With dead ends: 55 [2021-11-25 20:02:43,861 INFO L226 Difference]: Without dead ends: 26 [2021-11-25 20:02:43,864 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 12 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 20:02:43,873 INFO L933 BasicCegarLoop]: 37 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, 37 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 20:02:43,874 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 20:02:43,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-11-25 20:02:43,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-11-25 20:02:43,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-25 20:02:43,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 34 transitions. [2021-11-25 20:02:43,929 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 34 transitions. Word has length 13 [2021-11-25 20:02:43,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:02:43,930 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 34 transitions. [2021-11-25 20:02:43,930 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-25 20:02:43,931 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 34 transitions. [2021-11-25 20:02:43,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-25 20:02:43,932 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:02:43,932 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:02:43,948 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdc39e3f-9471-4815-af92-a6030d746a03/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-25 20:02:44,143 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdc39e3f-9471-4815-af92-a6030d746a03/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 20:02:44,144 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:02:44,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:02:44,145 INFO L85 PathProgramCache]: Analyzing trace with hash 1285201507, now seen corresponding path program 1 times [2021-11-25 20:02:44,145 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 20:02:44,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1074409984] [2021-11-25 20:02:44,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:02:44,146 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 20:02:44,146 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdc39e3f-9471-4815-af92-a6030d746a03/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 20:02:44,147 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdc39e3f-9471-4815-af92-a6030d746a03/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 20:02:44,155 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdc39e3f-9471-4815-af92-a6030d746a03/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-25 20:02:44,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:02:44,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 20:02:44,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:02:44,311 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:02:44,311 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:02:44,311 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 20:02:44,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1074409984] [2021-11-25 20:02:44,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1074409984] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:02:44,312 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:02:44,312 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 20:02:44,313 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111783371] [2021-11-25 20:02:44,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:02:44,314 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 20:02:44,314 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 20:02:44,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 20:02:44,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 20:02:44,316 INFO L87 Difference]: Start difference. First operand 26 states and 34 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-25 20:02:44,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:02:44,343 INFO L93 Difference]: Finished difference Result 38 states and 48 transitions. [2021-11-25 20:02:44,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 20:02:44,344 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2021-11-25 20:02:44,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:02:44,347 INFO L225 Difference]: With dead ends: 38 [2021-11-25 20:02:44,347 INFO L226 Difference]: Without dead ends: 29 [2021-11-25 20:02:44,347 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 20:02:44,349 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 0 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 92 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 20:02:44,350 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 92 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 20:02:44,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-11-25 20:02:44,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-11-25 20:02:44,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 24 states have internal predecessors, (32), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-25 20:02:44,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 38 transitions. [2021-11-25 20:02:44,359 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 38 transitions. Word has length 14 [2021-11-25 20:02:44,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:02:44,359 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 38 transitions. [2021-11-25 20:02:44,360 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-25 20:02:44,360 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 38 transitions. [2021-11-25 20:02:44,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-25 20:02:44,361 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:02:44,361 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:02:44,373 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdc39e3f-9471-4815-af92-a6030d746a03/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-25 20:02:44,572 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdc39e3f-9471-4815-af92-a6030d746a03/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 20:02:44,573 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:02:44,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:02:44,574 INFO L85 PathProgramCache]: Analyzing trace with hash 1497908235, now seen corresponding path program 1 times [2021-11-25 20:02:44,575 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 20:02:44,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1989107831] [2021-11-25 20:02:44,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:02:44,576 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 20:02:44,576 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdc39e3f-9471-4815-af92-a6030d746a03/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 20:02:44,577 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdc39e3f-9471-4815-af92-a6030d746a03/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 20:02:44,579 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdc39e3f-9471-4815-af92-a6030d746a03/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-25 20:02:44,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:02:44,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-25 20:02:44,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:02:44,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:02:44,970 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:02:44,970 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 20:02:44,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1989107831] [2021-11-25 20:02:44,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1989107831] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:02:44,971 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:02:44,971 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-25 20:02:44,971 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231613245] [2021-11-25 20:02:44,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:02:44,972 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 20:02:44,972 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 20:02:44,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 20:02:44,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-25 20:02:44,973 INFO L87 Difference]: Start difference. First operand 29 states and 38 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-25 20:02:45,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:02:45,034 INFO L93 Difference]: Finished difference Result 56 states and 73 transitions. [2021-11-25 20:02:45,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 20:02:45,035 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-11-25 20:02:45,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:02:45,036 INFO L225 Difference]: With dead ends: 56 [2021-11-25 20:02:45,036 INFO L226 Difference]: Without dead ends: 31 [2021-11-25 20:02:45,037 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-25 20:02:45,038 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 18 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 25 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 20:02:45,039 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 103 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 25 Unchecked, 0.0s Time] [2021-11-25 20:02:45,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-11-25 20:02:45,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-11-25 20:02:45,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 25 states have (on average 1.32) internal successors, (33), 26 states have internal predecessors, (33), 2 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-25 20:02:45,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 40 transitions. [2021-11-25 20:02:45,046 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 40 transitions. Word has length 15 [2021-11-25 20:02:45,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:02:45,046 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 40 transitions. [2021-11-25 20:02:45,047 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-25 20:02:45,047 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 40 transitions. [2021-11-25 20:02:45,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-25 20:02:45,048 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:02:45,048 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:02:45,067 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdc39e3f-9471-4815-af92-a6030d746a03/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-25 20:02:45,259 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdc39e3f-9471-4815-af92-a6030d746a03/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 20:02:45,260 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:02:45,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:02:45,261 INFO L85 PathProgramCache]: Analyzing trace with hash -2116811041, now seen corresponding path program 1 times [2021-11-25 20:02:45,261 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 20:02:45,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1950970399] [2021-11-25 20:02:45,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:02:45,262 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 20:02:45,262 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdc39e3f-9471-4815-af92-a6030d746a03/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 20:02:45,263 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdc39e3f-9471-4815-af92-a6030d746a03/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 20:02:45,281 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdc39e3f-9471-4815-af92-a6030d746a03/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-25 20:02:45,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:02:45,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 20:02:45,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:02:45,428 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:02:45,428 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:02:45,429 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 20:02:45,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1950970399] [2021-11-25 20:02:45,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1950970399] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:02:45,430 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:02:45,430 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 20:02:45,430 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304780242] [2021-11-25 20:02:45,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:02:45,431 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 20:02:45,431 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 20:02:45,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 20:02:45,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 20:02:45,432 INFO L87 Difference]: Start difference. First operand 31 states and 40 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-25 20:02:45,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:02:45,462 INFO L93 Difference]: Finished difference Result 43 states and 54 transitions. [2021-11-25 20:02:45,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 20:02:45,463 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2021-11-25 20:02:45,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:02:45,464 INFO L225 Difference]: With dead ends: 43 [2021-11-25 20:02:45,464 INFO L226 Difference]: Without dead ends: 34 [2021-11-25 20:02:45,464 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 20:02:45,466 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 0 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 101 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 20:02:45,466 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 101 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 20:02:45,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-11-25 20:02:45,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 31. [2021-11-25 20:02:45,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 25 states have (on average 1.32) internal successors, (33), 26 states have internal predecessors, (33), 2 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-25 20:02:45,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 40 transitions. [2021-11-25 20:02:45,479 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 40 transitions. Word has length 16 [2021-11-25 20:02:45,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:02:45,479 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 40 transitions. [2021-11-25 20:02:45,479 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-25 20:02:45,479 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 40 transitions. [2021-11-25 20:02:45,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-25 20:02:45,481 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:02:45,481 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:02:45,495 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdc39e3f-9471-4815-af92-a6030d746a03/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-25 20:02:45,689 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdc39e3f-9471-4815-af92-a6030d746a03/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 20:02:45,689 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:02:45,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:02:45,690 INFO L85 PathProgramCache]: Analyzing trace with hash 172315143, now seen corresponding path program 1 times [2021-11-25 20:02:45,690 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 20:02:45,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [723954388] [2021-11-25 20:02:45,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:02:45,691 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 20:02:45,691 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdc39e3f-9471-4815-af92-a6030d746a03/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 20:02:45,692 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdc39e3f-9471-4815-af92-a6030d746a03/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 20:02:45,698 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdc39e3f-9471-4815-af92-a6030d746a03/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-25 20:02:45,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:02:45,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-25 20:02:45,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:02:46,064 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:02:46,065 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:02:46,065 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 20:02:46,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [723954388] [2021-11-25 20:02:46,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [723954388] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:02:46,071 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:02:46,071 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-25 20:02:46,071 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498746765] [2021-11-25 20:02:46,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:02:46,072 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 20:02:46,072 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 20:02:46,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 20:02:46,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-25 20:02:46,073 INFO L87 Difference]: Start difference. First operand 31 states and 40 transitions. Second operand has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-25 20:02:46,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:02:46,127 INFO L93 Difference]: Finished difference Result 57 states and 72 transitions. [2021-11-25 20:02:46,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 20:02:46,131 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2021-11-25 20:02:46,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:02:46,132 INFO L225 Difference]: With dead ends: 57 [2021-11-25 20:02:46,132 INFO L226 Difference]: Without dead ends: 30 [2021-11-25 20:02:46,132 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-25 20:02:46,133 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 18 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 25 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 20:02:46,134 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 89 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 25 Unchecked, 0.0s Time] [2021-11-25 20:02:46,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-11-25 20:02:46,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2021-11-25 20:02:46,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 24 states have internal predecessors, (30), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-25 20:02:46,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 35 transitions. [2021-11-25 20:02:46,139 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 35 transitions. Word has length 17 [2021-11-25 20:02:46,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:02:46,139 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 35 transitions. [2021-11-25 20:02:46,139 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-25 20:02:46,139 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 35 transitions. [2021-11-25 20:02:46,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-25 20:02:46,140 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:02:46,140 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:02:46,159 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdc39e3f-9471-4815-af92-a6030d746a03/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-25 20:02:46,355 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdc39e3f-9471-4815-af92-a6030d746a03/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 20:02:46,356 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:02:46,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:02:46,356 INFO L85 PathProgramCache]: Analyzing trace with hash -1943218574, now seen corresponding path program 1 times [2021-11-25 20:02:46,357 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 20:02:46,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1360549425] [2021-11-25 20:02:46,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:02:46,357 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 20:02:46,357 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdc39e3f-9471-4815-af92-a6030d746a03/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 20:02:46,358 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdc39e3f-9471-4815-af92-a6030d746a03/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 20:02:46,374 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdc39e3f-9471-4815-af92-a6030d746a03/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-25 20:02:46,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:02:46,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 20:02:46,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:02:46,481 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-25 20:02:46,481 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:02:46,481 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 20:02:46,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1360549425] [2021-11-25 20:02:46,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1360549425] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:02:46,482 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:02:46,482 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 20:02:46,482 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751032880] [2021-11-25 20:02:46,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:02:46,483 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 20:02:46,483 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 20:02:46,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 20:02:46,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 20:02:46,484 INFO L87 Difference]: Start difference. First operand 28 states and 35 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-25 20:02:46,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:02:46,523 INFO L93 Difference]: Finished difference Result 40 states and 49 transitions. [2021-11-25 20:02:46,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 20:02:46,524 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 22 [2021-11-25 20:02:46,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:02:46,525 INFO L225 Difference]: With dead ends: 40 [2021-11-25 20:02:46,525 INFO L226 Difference]: Without dead ends: 31 [2021-11-25 20:02:46,525 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 20:02:46,526 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 0 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 89 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 20:02:46,527 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 89 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 20:02:46,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-11-25 20:02:46,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-11-25 20:02:46,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 25 states have (on average 1.28) internal successors, (32), 26 states have internal predecessors, (32), 2 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-25 20:02:46,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 39 transitions. [2021-11-25 20:02:46,532 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 39 transitions. Word has length 22 [2021-11-25 20:02:46,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:02:46,533 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 39 transitions. [2021-11-25 20:02:46,533 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-25 20:02:46,533 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 39 transitions. [2021-11-25 20:02:46,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-25 20:02:46,534 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:02:46,534 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:02:46,547 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdc39e3f-9471-4815-af92-a6030d746a03/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-25 20:02:46,737 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdc39e3f-9471-4815-af92-a6030d746a03/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 20:02:46,737 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:02:46,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:02:46,738 INFO L85 PathProgramCache]: Analyzing trace with hash -1682849308, now seen corresponding path program 1 times [2021-11-25 20:02:46,738 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 20:02:46,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1403039345] [2021-11-25 20:02:46,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:02:46,738 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 20:02:46,738 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdc39e3f-9471-4815-af92-a6030d746a03/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 20:02:46,739 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdc39e3f-9471-4815-af92-a6030d746a03/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 20:02:46,741 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdc39e3f-9471-4815-af92-a6030d746a03/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-25 20:02:46,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:02:46,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-25 20:02:46,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:02:47,094 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 20:02:47,094 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:02:47,095 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 20:02:47,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1403039345] [2021-11-25 20:02:47,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1403039345] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:02:47,095 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:02:47,095 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-25 20:02:47,095 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761150821] [2021-11-25 20:02:47,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:02:47,096 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 20:02:47,096 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 20:02:47,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 20:02:47,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-25 20:02:47,097 INFO L87 Difference]: Start difference. First operand 31 states and 39 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-25 20:02:47,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:02:47,216 INFO L93 Difference]: Finished difference Result 45 states and 55 transitions. [2021-11-25 20:02:47,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 20:02:47,217 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 23 [2021-11-25 20:02:47,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:02:47,218 INFO L225 Difference]: With dead ends: 45 [2021-11-25 20:02:47,218 INFO L226 Difference]: Without dead ends: 31 [2021-11-25 20:02:47,219 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-25 20:02:47,220 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 16 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 19 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:02:47,220 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 103 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 19 Unchecked, 0.1s Time] [2021-11-25 20:02:47,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-11-25 20:02:47,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-11-25 20:02:47,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 25 states have (on average 1.24) internal successors, (31), 26 states have internal predecessors, (31), 2 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-25 20:02:47,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 38 transitions. [2021-11-25 20:02:47,226 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 38 transitions. Word has length 23 [2021-11-25 20:02:47,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:02:47,226 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 38 transitions. [2021-11-25 20:02:47,227 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-25 20:02:47,227 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 38 transitions. [2021-11-25 20:02:47,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-25 20:02:47,228 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:02:47,228 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:02:47,244 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdc39e3f-9471-4815-af92-a6030d746a03/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-25 20:02:47,440 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdc39e3f-9471-4815-af92-a6030d746a03/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 20:02:47,440 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:02:47,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:02:47,441 INFO L85 PathProgramCache]: Analyzing trace with hash 474937390, now seen corresponding path program 1 times [2021-11-25 20:02:47,441 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 20:02:47,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1943874257] [2021-11-25 20:02:47,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:02:47,442 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 20:02:47,442 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdc39e3f-9471-4815-af92-a6030d746a03/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 20:02:47,442 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdc39e3f-9471-4815-af92-a6030d746a03/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 20:02:47,443 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdc39e3f-9471-4815-af92-a6030d746a03/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-25 20:02:47,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:02:47,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 20:02:47,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:02:47,572 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-25 20:02:47,572 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:02:47,573 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 20:02:47,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1943874257] [2021-11-25 20:02:47,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1943874257] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:02:47,573 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:02:47,573 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 20:02:47,573 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118951952] [2021-11-25 20:02:47,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:02:47,574 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 20:02:47,574 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 20:02:47,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 20:02:47,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 20:02:47,575 INFO L87 Difference]: Start difference. First operand 31 states and 38 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-25 20:02:47,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:02:47,603 INFO L93 Difference]: Finished difference Result 41 states and 49 transitions. [2021-11-25 20:02:47,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 20:02:47,603 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 24 [2021-11-25 20:02:47,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:02:47,605 INFO L225 Difference]: With dead ends: 41 [2021-11-25 20:02:47,605 INFO L226 Difference]: Without dead ends: 32 [2021-11-25 20:02:47,606 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 20:02:47,609 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 0 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 96 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 20:02:47,609 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 96 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 20:02:47,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-11-25 20:02:47,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 29. [2021-11-25 20:02:47,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.25) internal successors, (30), 24 states have internal predecessors, (30), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-25 20:02:47,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2021-11-25 20:02:47,627 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 24 [2021-11-25 20:02:47,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:02:47,627 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2021-11-25 20:02:47,627 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-25 20:02:47,627 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2021-11-25 20:02:47,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-25 20:02:47,629 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:02:47,629 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:02:47,653 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdc39e3f-9471-4815-af92-a6030d746a03/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-25 20:02:47,853 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdc39e3f-9471-4815-af92-a6030d746a03/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 20:02:47,853 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:02:47,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:02:47,854 INFO L85 PathProgramCache]: Analyzing trace with hash -1777787178, now seen corresponding path program 1 times [2021-11-25 20:02:47,854 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 20:02:47,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [500590090] [2021-11-25 20:02:47,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:02:47,854 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 20:02:47,854 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdc39e3f-9471-4815-af92-a6030d746a03/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 20:02:47,855 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdc39e3f-9471-4815-af92-a6030d746a03/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 20:02:47,856 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdc39e3f-9471-4815-af92-a6030d746a03/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-25 20:02:47,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:02:47,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-25 20:02:47,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:02:48,027 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 20:02:48,027 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:02:48,028 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 20:02:48,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [500590090] [2021-11-25 20:02:48,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [500590090] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:02:48,028 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:02:48,028 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-25 20:02:48,028 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872215050] [2021-11-25 20:02:48,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:02:48,029 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 20:02:48,029 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 20:02:48,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 20:02:48,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-25 20:02:48,030 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-25 20:02:48,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:02:48,129 INFO L93 Difference]: Finished difference Result 42 states and 47 transitions. [2021-11-25 20:02:48,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 20:02:48,130 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 24 [2021-11-25 20:02:48,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:02:48,131 INFO L225 Difference]: With dead ends: 42 [2021-11-25 20:02:48,131 INFO L226 Difference]: Without dead ends: 39 [2021-11-25 20:02:48,131 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-25 20:02:48,132 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 34 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:02:48,133 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 118 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 20:02:48,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-11-25 20:02:48,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 32. [2021-11-25 20:02:48,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 27 states have internal predecessors, (33), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-25 20:02:48,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 38 transitions. [2021-11-25 20:02:48,137 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 38 transitions. Word has length 24 [2021-11-25 20:02:48,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:02:48,138 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 38 transitions. [2021-11-25 20:02:48,138 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-25 20:02:48,138 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions. [2021-11-25 20:02:48,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-25 20:02:48,139 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:02:48,139 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:02:48,156 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdc39e3f-9471-4815-af92-a6030d746a03/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-25 20:02:48,356 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdc39e3f-9471-4815-af92-a6030d746a03/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 20:02:48,356 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:02:48,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:02:48,356 INFO L85 PathProgramCache]: Analyzing trace with hash -1835045480, now seen corresponding path program 1 times [2021-11-25 20:02:48,357 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 20:02:48,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1043820868] [2021-11-25 20:02:48,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:02:48,357 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 20:02:48,357 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdc39e3f-9471-4815-af92-a6030d746a03/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 20:02:48,358 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdc39e3f-9471-4815-af92-a6030d746a03/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 20:02:48,361 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdc39e3f-9471-4815-af92-a6030d746a03/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-25 20:02:48,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:02:48,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-25 20:02:48,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:02:48,532 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 20:02:48,532 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:02:48,532 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 20:02:48,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1043820868] [2021-11-25 20:02:48,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1043820868] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:02:48,533 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:02:48,533 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 20:02:48,533 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830199022] [2021-11-25 20:02:48,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:02:48,533 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:02:48,534 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 20:02:48,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:02:48,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:02:48,534 INFO L87 Difference]: Start difference. First operand 32 states and 38 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-25 20:02:48,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:02:48,541 INFO L93 Difference]: Finished difference Result 41 states and 47 transitions. [2021-11-25 20:02:48,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:02:48,541 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 24 [2021-11-25 20:02:48,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:02:48,542 INFO L225 Difference]: With dead ends: 41 [2021-11-25 20:02:48,542 INFO L226 Difference]: Without dead ends: 31 [2021-11-25 20:02:48,543 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:02:48,543 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 12 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 20:02:48,544 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 43 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 20:02:48,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-11-25 20:02:48,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-11-25 20:02:48,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 26 states have internal predecessors, (31), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-25 20:02:48,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2021-11-25 20:02:48,547 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 24 [2021-11-25 20:02:48,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:02:48,548 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2021-11-25 20:02:48,548 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-25 20:02:48,548 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2021-11-25 20:02:48,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-25 20:02:48,549 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:02:48,549 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:02:48,581 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdc39e3f-9471-4815-af92-a6030d746a03/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-25 20:02:48,749 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdc39e3f-9471-4815-af92-a6030d746a03/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 20:02:48,750 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:02:48,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:02:48,750 INFO L85 PathProgramCache]: Analyzing trace with hash 1323122336, now seen corresponding path program 1 times [2021-11-25 20:02:48,750 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 20:02:48,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [510440615] [2021-11-25 20:02:48,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:02:48,751 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 20:02:48,751 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdc39e3f-9471-4815-af92-a6030d746a03/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 20:02:48,751 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdc39e3f-9471-4815-af92-a6030d746a03/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 20:02:48,758 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdc39e3f-9471-4815-af92-a6030d746a03/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-25 20:02:48,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:02:48,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-25 20:02:48,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:02:49,006 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 20:02:49,006 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:02:49,006 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 20:02:49,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [510440615] [2021-11-25 20:02:49,006 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [510440615] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:02:49,006 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:02:49,006 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-25 20:02:49,007 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226800780] [2021-11-25 20:02:49,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:02:49,007 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 20:02:49,007 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 20:02:49,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 20:02:49,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-25 20:02:49,008 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-25 20:02:49,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:02:49,145 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2021-11-25 20:02:49,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 20:02:49,148 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 25 [2021-11-25 20:02:49,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:02:49,149 INFO L225 Difference]: With dead ends: 42 [2021-11-25 20:02:49,149 INFO L226 Difference]: Without dead ends: 25 [2021-11-25 20:02:49,149 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-25 20:02:49,150 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 14 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 16 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:02:49,150 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 85 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 16 Unchecked, 0.1s Time] [2021-11-25 20:02:49,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-11-25 20:02:49,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-11-25 20:02:49,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 21 states have (on average 1.0476190476190477) internal successors, (22), 21 states have internal predecessors, (22), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-25 20:02:49,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2021-11-25 20:02:49,154 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 25 [2021-11-25 20:02:49,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:02:49,154 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2021-11-25 20:02:49,154 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-25 20:02:49,154 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2021-11-25 20:02:49,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-25 20:02:49,155 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:02:49,155 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:02:49,169 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdc39e3f-9471-4815-af92-a6030d746a03/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-25 20:02:49,369 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdc39e3f-9471-4815-af92-a6030d746a03/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 20:02:49,369 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:02:49,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:02:49,370 INFO L85 PathProgramCache]: Analyzing trace with hash 2065734315, now seen corresponding path program 1 times [2021-11-25 20:02:49,370 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 20:02:49,370 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2141844009] [2021-11-25 20:02:49,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:02:49,370 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 20:02:49,370 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdc39e3f-9471-4815-af92-a6030d746a03/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 20:02:49,371 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdc39e3f-9471-4815-af92-a6030d746a03/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 20:02:49,382 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdc39e3f-9471-4815-af92-a6030d746a03/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-25 20:02:49,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-25 20:02:49,492 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-25 20:02:49,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-25 20:02:49,602 INFO L133 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2021-11-25 20:02:49,602 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-11-25 20:02:49,603 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-25 20:02:49,629 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdc39e3f-9471-4815-af92-a6030d746a03/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-25 20:02:49,805 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdc39e3f-9471-4815-af92-a6030d746a03/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 20:02:49,808 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:02:49,810 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-25 20:02:49,845 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.11 08:02:49 BoogieIcfgContainer [2021-11-25 20:02:49,845 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-25 20:02:49,846 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-25 20:02:49,846 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-25 20:02:49,846 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-25 20:02:49,847 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:02:43" (3/4) ... [2021-11-25 20:02:49,848 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-11-25 20:02:49,892 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdc39e3f-9471-4815-af92-a6030d746a03/bin/utaipan-eEHZpOm5b7/witness.graphml [2021-11-25 20:02:49,892 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-25 20:02:49,893 INFO L158 Benchmark]: Toolchain (without parser) took 7311.00ms. Allocated memory was 62.9MB in the beginning and 96.5MB in the end (delta: 33.6MB). Free memory was 42.7MB in the beginning and 56.0MB in the end (delta: -13.3MB). Peak memory consumption was 20.8MB. Max. memory is 16.1GB. [2021-11-25 20:02:49,893 INFO L158 Benchmark]: CDTParser took 0.25ms. Allocated memory is still 62.9MB. Free memory is still 43.0MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-25 20:02:49,894 INFO L158 Benchmark]: CACSL2BoogieTranslator took 283.58ms. Allocated memory is still 62.9MB. Free memory was 42.4MB in the beginning and 43.8MB in the end (delta: -1.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-25 20:02:49,894 INFO L158 Benchmark]: Boogie Procedure Inliner took 56.47ms. Allocated memory is still 62.9MB. Free memory was 43.6MB in the beginning and 42.0MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-25 20:02:49,894 INFO L158 Benchmark]: Boogie Preprocessor took 60.71ms. Allocated memory is still 62.9MB. Free memory was 42.0MB in the beginning and 40.6MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-25 20:02:49,895 INFO L158 Benchmark]: RCFGBuilder took 459.86ms. Allocated memory is still 62.9MB. Free memory was 40.6MB in the beginning and 28.7MB in the end (delta: 11.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-25 20:02:49,895 INFO L158 Benchmark]: TraceAbstraction took 6397.44ms. Allocated memory was 62.9MB in the beginning and 96.5MB in the end (delta: 33.6MB). Free memory was 28.2MB in the beginning and 58.8MB in the end (delta: -30.7MB). Peak memory consumption was 3.3MB. Max. memory is 16.1GB. [2021-11-25 20:02:49,896 INFO L158 Benchmark]: Witness Printer took 46.40ms. Allocated memory is still 96.5MB. Free memory was 58.8MB in the beginning and 56.0MB in the end (delta: 2.9MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-11-25 20:02:49,898 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25ms. Allocated memory is still 62.9MB. Free memory is still 43.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 283.58ms. Allocated memory is still 62.9MB. Free memory was 42.4MB in the beginning and 43.8MB in the end (delta: -1.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 56.47ms. Allocated memory is still 62.9MB. Free memory was 43.6MB in the beginning and 42.0MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 60.71ms. Allocated memory is still 62.9MB. Free memory was 42.0MB in the beginning and 40.6MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 459.86ms. Allocated memory is still 62.9MB. Free memory was 40.6MB in the beginning and 28.7MB in the end (delta: 11.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 6397.44ms. Allocated memory was 62.9MB in the beginning and 96.5MB in the end (delta: 33.6MB). Free memory was 28.2MB in the beginning and 58.8MB in the end (delta: -30.7MB). Peak memory consumption was 3.3MB. Max. memory is 16.1GB. * Witness Printer took 46.40ms. Allocated memory is still 96.5MB. Free memory was 58.8MB in the beginning and 56.0MB in the end (delta: 2.9MB). 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 - CounterExampleResult [Line: 82]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L76] double x = -0.0; [L77] double y = 0.0; [L78] CALL, EXPR fmin_double(x, y) [L48] CALL, EXPR __fpclassify_double(x) VAL [\old(x)=0.0] [L21] __uint32_t msw, lsw; VAL [\old(x)=0.0, x=0.0] [L24] ieee_double_shape_type ew_u; [L25] ew_u.value = (x) [L26] EXPR ew_u.parts.msw [L26] (msw) = ew_u.parts.msw [L27] EXPR ew_u.parts.lsw [L27] (lsw) = ew_u.parts.lsw [L30-L31] COND TRUE (msw == 0x00000000 && lsw == 0x00000000) || (msw == 0x80000000 && lsw == 0x00000000) [L32] return 2; VAL [\old(x)=0.0, \result=2, lsw=0, msw=-2147483648, x=0.0] [L48] RET, EXPR __fpclassify_double(x) VAL [\old(x)=0.0, \old(y)=0.0, __fpclassify_double(x)=2, x=0.0, y=0.0] [L48] COND FALSE !(__fpclassify_double(x) == 0) [L50] CALL, EXPR __fpclassify_double(y) VAL [\old(x)=0.0] [L21] __uint32_t msw, lsw; VAL [\old(x)=0.0, x=0.0] [L24] ieee_double_shape_type ew_u; [L25] ew_u.value = (x) [L26] EXPR ew_u.parts.msw [L26] (msw) = ew_u.parts.msw [L27] EXPR ew_u.parts.lsw [L27] (lsw) = ew_u.parts.lsw [L30-L31] COND TRUE (msw == 0x00000000 && lsw == 0x00000000) || (msw == 0x80000000 && lsw == 0x00000000) [L32] return 2; VAL [\old(x)=0.0, \result=2, lsw=0, msw=0, x=0.0] [L50] RET, EXPR __fpclassify_double(y) VAL [\old(x)=0.0, \old(y)=0.0, __fpclassify_double(y)=2, x=0.0, y=0.0] [L50] COND FALSE !(__fpclassify_double(y) == 0) [L53] EXPR x < y ? x : y VAL [\old(x)=0.0, \old(y)=0.0, x=0.0, x < y ? x : y=0.0, y=0.0] [L53] return x < y ? x : y; [L78] RET, EXPR fmin_double(x, y) [L78] double res = fmin_double(x, y); [L81] EXPR res == -0.0 && __signbit_double(res) == 1 [L81] CALL, EXPR __signbit_double(res) [L57] __uint32_t msw; VAL [\old(x)=0.0, x=0.0] [L60] ieee_double_shape_type gh_u; [L61] gh_u.value = (x) [L62] EXPR gh_u.parts.msw [L62] (msw) = gh_u.parts.msw [L65] return (msw & 0x80000000) != 0; VAL [\old(x)=0.0, \result=0, msw=0, x=0.0] [L81] RET, EXPR __signbit_double(res) [L81] EXPR res == -0.0 && __signbit_double(res) == 1 VAL [__signbit_double(res)=0, res=0.0, res == -0.0 && __signbit_double(res) == 1=0, x=0.0, y=0.0] [L81] COND TRUE !(res == -0.0 && __signbit_double(res) == 1) [L82] reach_error() VAL [res=0.0, x=0.0, y=0.0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 29 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 6.3s, OverallIterations: 12, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 118 SdHoareTripleChecker+Valid, 0.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 112 mSDsluCounter, 956 SdHoareTripleChecker+Invalid, 0.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 85 IncrementalHoareTripleChecker+Unchecked, 623 mSDsCounter, 3 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 98 IncrementalHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 3 mSolverCounterUnsat, 333 mSDtfsCounter, 98 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 214 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=32occurred in iteration=9, InterpolantAutomatonStates: 56, 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, 11 MinimizatonAttempts, 15 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 1.5s InterpolantComputationTime, 245 NumberOfCodeBlocks, 245 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 206 ConstructedInterpolants, 24 QuantifiedInterpolants, 725 SizeOfPredicates, 35 NumberOfNonLiveVariables, 787 ConjunctsInSsa, 72 ConjunctsInUnsatCore, 11 InterpolantComputations, 11 PerfectInterpolantSequences, 36/36 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 proved your program to be incorrect! [2021-11-25 20:02:49,936 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdc39e3f-9471-4815-af92-a6030d746a03/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 Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE