./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/float-newlib/float_req_bl_1232b.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_258d8b08-8b9f-46ea-8f94-baa50fa31fe4/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_258d8b08-8b9f-46ea-8f94-baa50fa31fe4/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_258d8b08-8b9f-46ea-8f94-baa50fa31fe4/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_258d8b08-8b9f-46ea-8f94-baa50fa31fe4/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-newlib/float_req_bl_1232b.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_258d8b08-8b9f-46ea-8f94-baa50fa31fe4/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_258d8b08-8b9f-46ea-8f94-baa50fa31fe4/bin/utaipan-TEXQjIfE4P --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 6764d5c0204d5929259e99bbe2407d8f2018e402cda704b63da836202ebf4e68 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-21 00:46:08,678 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 00:46:08,681 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 00:46:08,737 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 00:46:08,738 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 00:46:08,743 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 00:46:08,745 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 00:46:08,748 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 00:46:08,751 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 00:46:08,756 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 00:46:08,758 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 00:46:08,759 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 00:46:08,760 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 00:46:08,762 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 00:46:08,764 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 00:46:08,769 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 00:46:08,771 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 00:46:08,772 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 00:46:08,774 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 00:46:08,782 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 00:46:08,783 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 00:46:08,785 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 00:46:08,788 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 00:46:08,789 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 00:46:08,797 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 00:46:08,798 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 00:46:08,798 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 00:46:08,800 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 00:46:08,801 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 00:46:08,802 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 00:46:08,803 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 00:46:08,804 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 00:46:08,806 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 00:46:08,807 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 00:46:08,809 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 00:46:08,809 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 00:46:08,810 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 00:46:08,810 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 00:46:08,810 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 00:46:08,811 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 00:46:08,812 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 00:46:08,812 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_258d8b08-8b9f-46ea-8f94-baa50fa31fe4/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-21 00:46:08,853 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 00:46:08,854 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 00:46:08,854 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 00:46:08,854 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 00:46:08,861 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 00:46:08,862 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 00:46:08,862 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 00:46:08,862 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 00:46:08,862 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 00:46:08,863 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-21 00:46:08,864 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 00:46:08,864 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 00:46:08,864 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-21 00:46:08,864 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-21 00:46:08,865 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 00:46:08,865 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-21 00:46:08,865 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-21 00:46:08,865 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-21 00:46:08,866 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 00:46:08,866 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-21 00:46:08,866 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-21 00:46:08,867 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-21 00:46:08,867 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 00:46:08,867 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-21 00:46:08,867 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 00:46:08,868 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-21 00:46:08,868 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-21 00:46:08,868 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-21 00:46:08,868 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 00:46:08,868 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-21 00:46:08,869 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 00:46:08,869 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 00:46:08,869 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 00:46:08,870 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 00:46:08,870 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 00:46:08,870 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-21 00:46:08,870 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-21 00:46:08,870 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-21 00:46:08,871 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-21 00:46:08,871 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 00:46:08,871 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 00:46:08,871 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_258d8b08-8b9f-46ea-8f94-baa50fa31fe4/bin/utaipan-TEXQjIfE4P/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_258d8b08-8b9f-46ea-8f94-baa50fa31fe4/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6764d5c0204d5929259e99bbe2407d8f2018e402cda704b63da836202ebf4e68 [2021-11-21 00:46:09,160 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 00:46:09,190 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 00:46:09,193 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 00:46:09,194 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 00:46:09,195 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 00:46:09,196 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_258d8b08-8b9f-46ea-8f94-baa50fa31fe4/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/float-newlib/float_req_bl_1232b.c [2021-11-21 00:46:09,268 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_258d8b08-8b9f-46ea-8f94-baa50fa31fe4/bin/utaipan-TEXQjIfE4P/data/7baf12afa/0f9545dcbaff403c87515a9c7cd6b98e/FLAG516ed3575 [2021-11-21 00:46:09,740 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 00:46:09,742 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_258d8b08-8b9f-46ea-8f94-baa50fa31fe4/sv-benchmarks/c/float-newlib/float_req_bl_1232b.c [2021-11-21 00:46:09,754 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_258d8b08-8b9f-46ea-8f94-baa50fa31fe4/bin/utaipan-TEXQjIfE4P/data/7baf12afa/0f9545dcbaff403c87515a9c7cd6b98e/FLAG516ed3575 [2021-11-21 00:46:10,090 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_258d8b08-8b9f-46ea-8f94-baa50fa31fe4/bin/utaipan-TEXQjIfE4P/data/7baf12afa/0f9545dcbaff403c87515a9c7cd6b98e [2021-11-21 00:46:10,092 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 00:46:10,094 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 00:46:10,104 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 00:46:10,105 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 00:46:10,107 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 00:46:10,108 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 12:46:10" (1/1) ... [2021-11-21 00:46:10,109 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2a3f8a5b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:46:10, skipping insertion in model container [2021-11-21 00:46:10,109 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 12:46:10" (1/1) ... [2021-11-21 00:46:10,116 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 00:46:10,130 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 00:46:10,379 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_258d8b08-8b9f-46ea-8f94-baa50fa31fe4/sv-benchmarks/c/float-newlib/float_req_bl_1232b.c[1657,1670] [2021-11-21 00:46:10,384 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 00:46:10,394 INFO L203 MainTranslator]: Completed pre-run [2021-11-21 00:46:10,427 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_258d8b08-8b9f-46ea-8f94-baa50fa31fe4/sv-benchmarks/c/float-newlib/float_req_bl_1232b.c[1657,1670] [2021-11-21 00:46:10,428 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 00:46:10,439 INFO L208 MainTranslator]: Completed translation [2021-11-21 00:46:10,440 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:46:10 WrapperNode [2021-11-21 00:46:10,440 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 00:46:10,441 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-21 00:46:10,441 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-21 00:46:10,441 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-21 00:46:10,447 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:46:10" (1/1) ... [2021-11-21 00:46:10,454 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:46:10" (1/1) ... [2021-11-21 00:46:10,474 INFO L137 Inliner]: procedures = 18, calls = 19, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 67 [2021-11-21 00:46:10,474 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-21 00:46:10,475 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-21 00:46:10,475 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-21 00:46:10,475 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-21 00:46:10,483 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:46:10" (1/1) ... [2021-11-21 00:46:10,484 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:46:10" (1/1) ... [2021-11-21 00:46:10,486 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:46:10" (1/1) ... [2021-11-21 00:46:10,486 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:46:10" (1/1) ... [2021-11-21 00:46:10,493 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:46:10" (1/1) ... [2021-11-21 00:46:10,497 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:46:10" (1/1) ... [2021-11-21 00:46:10,499 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:46:10" (1/1) ... [2021-11-21 00:46:10,501 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-21 00:46:10,502 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-21 00:46:10,502 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-21 00:46:10,502 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-21 00:46:10,514 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:46:10" (1/1) ... [2021-11-21 00:46:10,521 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 00:46:10,541 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_258d8b08-8b9f-46ea-8f94-baa50fa31fe4/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:46:10,566 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_258d8b08-8b9f-46ea-8f94-baa50fa31fe4/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-21 00:46:10,578 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_258d8b08-8b9f-46ea-8f94-baa50fa31fe4/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-21 00:46:10,627 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-21 00:46:10,628 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-21 00:46:10,628 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-21 00:46:10,628 INFO L130 BoogieDeclarations]: Found specification of procedure __fpclassify_float [2021-11-21 00:46:10,628 INFO L138 BoogieDeclarations]: Found implementation of procedure __fpclassify_float [2021-11-21 00:46:10,629 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2021-11-21 00:46:10,629 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-21 00:46:10,629 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-21 00:46:10,629 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-21 00:46:10,629 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-21 00:46:10,706 INFO L236 CfgBuilder]: Building ICFG [2021-11-21 00:46:10,708 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-21 00:46:10,941 INFO L277 CfgBuilder]: Performing block encoding [2021-11-21 00:46:11,078 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-21 00:46:11,088 INFO L301 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-21 00:46:11,091 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 12:46:11 BoogieIcfgContainer [2021-11-21 00:46:11,096 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-21 00:46:11,098 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-21 00:46:11,098 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-21 00:46:11,102 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-21 00:46:11,103 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 12:46:10" (1/3) ... [2021-11-21 00:46:11,103 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1762d93a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 12:46:11, skipping insertion in model container [2021-11-21 00:46:11,104 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:46:10" (2/3) ... [2021-11-21 00:46:11,104 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1762d93a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 12:46:11, skipping insertion in model container [2021-11-21 00:46:11,104 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 12:46:11" (3/3) ... [2021-11-21 00:46:11,106 INFO L111 eAbstractionObserver]: Analyzing ICFG float_req_bl_1232b.c [2021-11-21 00:46:11,112 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-21 00:46:11,113 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-21 00:46:11,201 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-21 00:46:11,214 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 [2021-11-21 00:46:11,214 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-21 00:46:11,249 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) [2021-11-21 00:46:11,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-21 00:46:11,255 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:46:11,256 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:46:11,257 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:46:11,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:46:11,263 INFO L85 PathProgramCache]: Analyzing trace with hash 1150042382, now seen corresponding path program 1 times [2021-11-21 00:46:11,275 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:46:11,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65190036] [2021-11-21 00:46:11,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:46:11,276 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:46:11,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:46:11,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:46:11,473 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:46:11,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65190036] [2021-11-21 00:46:11,475 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65190036] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:46:11,476 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:46:11,476 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-21 00:46:11,478 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631409507] [2021-11-21 00:46:11,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:46:11,485 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-21 00:46:11,485 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:46:11,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-21 00:46:11,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-21 00:46:11,526 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) [2021-11-21 00:46:11,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:46:11,591 INFO L93 Difference]: Finished difference Result 40 states and 55 transitions. [2021-11-21 00:46:11,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-21 00:46:11,594 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 [2021-11-21 00:46:11,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:46:11,604 INFO L225 Difference]: With dead ends: 40 [2021-11-21 00:46:11,605 INFO L226 Difference]: Without dead ends: 19 [2021-11-21 00:46:11,608 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 [2021-11-21 00:46:11,615 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 [2021-11-21 00:46:11,616 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] [2021-11-21 00:46:11,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-11-21 00:46:11,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-11-21 00:46:11,660 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) [2021-11-21 00:46:11,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2021-11-21 00:46:11,664 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 12 [2021-11-21 00:46:11,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:46:11,665 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2021-11-21 00:46:11,665 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) [2021-11-21 00:46:11,666 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2021-11-21 00:46:11,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-21 00:46:11,668 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:46:11,668 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:46:11,669 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-21 00:46:11,670 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:46:11,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:46:11,671 INFO L85 PathProgramCache]: Analyzing trace with hash -2093005978, now seen corresponding path program 1 times [2021-11-21 00:46:11,672 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:46:11,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363935581] [2021-11-21 00:46:11,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:46:11,673 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:46:11,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-21 00:46:11,761 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-21 00:46:11,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-21 00:46:11,860 INFO L133 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-11-21 00:46:11,860 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-11-21 00:46:11,863 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-21 00:46:11,865 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-21 00:46:11,874 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1] [2021-11-21 00:46:11,878 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-21 00:46:11,918 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.11 12:46:11 BoogieIcfgContainer [2021-11-21 00:46:11,919 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-21 00:46:11,919 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-21 00:46:11,919 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-21 00:46:11,920 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-21 00:46:11,920 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 12:46:11" (3/4) ... [2021-11-21 00:46:11,924 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-11-21 00:46:11,924 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-21 00:46:11,926 INFO L158 Benchmark]: Toolchain (without parser) took 1831.06ms. Allocated memory is still 111.1MB. Free memory was 71.9MB in the beginning and 43.1MB in the end (delta: 28.8MB). Peak memory consumption was 26.9MB. Max. memory is 16.1GB. [2021-11-21 00:46:11,927 INFO L158 Benchmark]: CDTParser took 0.24ms. Allocated memory is still 111.1MB. Free memory is still 88.2MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-21 00:46:11,929 INFO L158 Benchmark]: CACSL2BoogieTranslator took 335.59ms. Allocated memory is still 111.1MB. Free memory was 71.7MB in the beginning and 86.5MB in the end (delta: -14.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-21 00:46:11,932 INFO L158 Benchmark]: Boogie Procedure Inliner took 33.69ms. Allocated memory is still 111.1MB. Free memory was 86.5MB in the beginning and 84.6MB in the end (delta: 1.8MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-21 00:46:11,934 INFO L158 Benchmark]: Boogie Preprocessor took 26.34ms. Allocated memory is still 111.1MB. Free memory was 84.6MB in the beginning and 83.6MB in the end (delta: 1.0MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-11-21 00:46:11,938 INFO L158 Benchmark]: RCFGBuilder took 594.10ms. Allocated memory is still 111.1MB. Free memory was 83.6MB in the beginning and 69.3MB in the end (delta: 14.3MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2021-11-21 00:46:11,942 INFO L158 Benchmark]: TraceAbstraction took 820.88ms. Allocated memory is still 111.1MB. Free memory was 68.9MB in the beginning and 43.4MB in the end (delta: 25.5MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. [2021-11-21 00:46:11,942 INFO L158 Benchmark]: Witness Printer took 4.72ms. Allocated memory is still 111.1MB. Free memory was 43.4MB in the beginning and 43.1MB in the end (delta: 332.4kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-21 00:46:11,947 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24ms. Allocated memory is still 111.1MB. Free memory is still 88.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 335.59ms. Allocated memory is still 111.1MB. Free memory was 71.7MB in the beginning and 86.5MB in the end (delta: -14.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 33.69ms. Allocated memory is still 111.1MB. Free memory was 86.5MB in the beginning and 84.6MB in the end (delta: 1.8MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 26.34ms. Allocated memory is still 111.1MB. Free memory was 84.6MB in the beginning and 83.6MB in the end (delta: 1.0MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * RCFGBuilder took 594.10ms. Allocated memory is still 111.1MB. Free memory was 83.6MB in the beginning and 69.3MB in the end (delta: 14.3MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * TraceAbstraction took 820.88ms. Allocated memory is still 111.1MB. Free memory was 68.9MB in the beginning and 43.4MB in the end (delta: 25.5MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. * Witness Printer took 4.72ms. Allocated memory is still 111.1MB. Free memory was 43.4MB in the beginning and 43.1MB in the end (delta: 332.4kB). 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: 72]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 71, overapproximation of someUnaryFLOAToperation at line 66. Possible FailurePath: [L66] float x = -0.0f; [L67] float y = 0.0f; [L68] CALL, EXPR fmin_float(x, y) [L38] CALL, EXPR __fpclassify_float(x) VAL [\old(x)=4286578690] [L15] __uint32_t w; VAL [\old(x)=4286578690, x=4286578690] [L18] ieee_float_shape_type gf_u; [L19] gf_u.value = (x) [L20] EXPR gf_u.word [L20] (w) = gf_u.word [L23] COND FALSE !(w == 0x00000000 || w == 0x80000000) [L25-L26] COND FALSE !((w >= 0x00800000 && w <= 0x7f7fffff) || (w >= 0x80800000 && w <= 0xff7fffff)) [L28-L29] COND FALSE !((w >= 0x00000001 && w <= 0x007fffff) || (w >= 0x80000001 && w <= 0x807fffff)) [L31] COND FALSE !(w == 0x7f800000 || w == 0xff800000) [L34] return 0; [L38] RET, EXPR __fpclassify_float(x) VAL [\old(x)=4286578690, \old(y)=0, __fpclassify_float(x)=0, x=4286578690, y=0] [L38] COND TRUE __fpclassify_float(x) == 0 [L39] return y; VAL [\old(x)=4286578690, \old(y)=0, \result=0, x=4286578690, y=0] [L68] RET, EXPR fmin_float(x, y) [L68] float res = fmin_float(x, y); [L71] EXPR res == -0.0f && __signbit_float(res) == 1 VAL [res=0, res == -0.0f && __signbit_float(res) == 1=0, x=4286578690, y=0] [L71] COND TRUE !(res == -0.0f && __signbit_float(res) == 1) [L72] reach_error() VAL [res=0, x=4286578690, y=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 21 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 0.7s, 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, 0.1s 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 [2021-11-21 00:46:12,044 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_258d8b08-8b9f-46ea-8f94-baa50fa31fe4/bin/utaipan-TEXQjIfE4P/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_258d8b08-8b9f-46ea-8f94-baa50fa31fe4/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_258d8b08-8b9f-46ea-8f94-baa50fa31fe4/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_258d8b08-8b9f-46ea-8f94-baa50fa31fe4/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_258d8b08-8b9f-46ea-8f94-baa50fa31fe4/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-newlib/float_req_bl_1232b.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_258d8b08-8b9f-46ea-8f94-baa50fa31fe4/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_258d8b08-8b9f-46ea-8f94-baa50fa31fe4/bin/utaipan-TEXQjIfE4P --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 6764d5c0204d5929259e99bbe2407d8f2018e402cda704b63da836202ebf4e68 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-21 00:46:14,883 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 00:46:14,887 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 00:46:14,944 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 00:46:14,945 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 00:46:14,951 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 00:46:14,952 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 00:46:14,957 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 00:46:14,960 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 00:46:14,971 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 00:46:14,973 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 00:46:14,974 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 00:46:14,975 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 00:46:14,977 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 00:46:14,979 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 00:46:14,985 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 00:46:14,987 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 00:46:14,988 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 00:46:14,990 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 00:46:14,996 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 00:46:14,999 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 00:46:15,000 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 00:46:15,003 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 00:46:15,006 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 00:46:15,012 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 00:46:15,013 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 00:46:15,013 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 00:46:15,015 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 00:46:15,016 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 00:46:15,017 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 00:46:15,018 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 00:46:15,018 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 00:46:15,020 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 00:46:15,021 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 00:46:15,033 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 00:46:15,033 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 00:46:15,034 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 00:46:15,035 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 00:46:15,035 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 00:46:15,037 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 00:46:15,038 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 00:46:15,039 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_258d8b08-8b9f-46ea-8f94-baa50fa31fe4/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-21 00:46:15,090 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 00:46:15,091 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 00:46:15,091 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 00:46:15,092 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 00:46:15,093 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 00:46:15,093 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 00:46:15,093 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 00:46:15,094 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 00:46:15,095 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 00:46:15,095 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 00:46:15,096 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 00:46:15,097 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 00:46:15,098 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 00:46:15,099 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-21 00:46:15,099 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-21 00:46:15,099 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 00:46:15,100 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-21 00:46:15,100 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 00:46:15,100 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-21 00:46:15,100 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-21 00:46:15,101 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-21 00:46:15,101 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-21 00:46:15,101 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-21 00:46:15,102 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 00:46:15,102 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-21 00:46:15,102 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 00:46:15,102 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-21 00:46:15,103 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 00:46:15,103 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 00:46:15,103 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 00:46:15,104 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 00:46:15,104 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-21 00:46:15,104 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-21 00:46:15,105 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-21 00:46:15,105 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-21 00:46:15,105 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 00:46:15,106 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 00:46:15,106 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_258d8b08-8b9f-46ea-8f94-baa50fa31fe4/bin/utaipan-TEXQjIfE4P/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_258d8b08-8b9f-46ea-8f94-baa50fa31fe4/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6764d5c0204d5929259e99bbe2407d8f2018e402cda704b63da836202ebf4e68 [2021-11-21 00:46:15,563 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 00:46:15,594 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 00:46:15,597 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 00:46:15,598 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 00:46:15,599 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 00:46:15,600 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_258d8b08-8b9f-46ea-8f94-baa50fa31fe4/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/float-newlib/float_req_bl_1232b.c [2021-11-21 00:46:15,680 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_258d8b08-8b9f-46ea-8f94-baa50fa31fe4/bin/utaipan-TEXQjIfE4P/data/76c391c62/98d56d9fdd96410eb00fe1e8968a3d76/FLAG988f8a2c8 [2021-11-21 00:46:16,282 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 00:46:16,283 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_258d8b08-8b9f-46ea-8f94-baa50fa31fe4/sv-benchmarks/c/float-newlib/float_req_bl_1232b.c [2021-11-21 00:46:16,291 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_258d8b08-8b9f-46ea-8f94-baa50fa31fe4/bin/utaipan-TEXQjIfE4P/data/76c391c62/98d56d9fdd96410eb00fe1e8968a3d76/FLAG988f8a2c8 [2021-11-21 00:46:16,629 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_258d8b08-8b9f-46ea-8f94-baa50fa31fe4/bin/utaipan-TEXQjIfE4P/data/76c391c62/98d56d9fdd96410eb00fe1e8968a3d76 [2021-11-21 00:46:16,633 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 00:46:16,636 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 00:46:16,638 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 00:46:16,638 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 00:46:16,642 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 00:46:16,643 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 12:46:16" (1/1) ... [2021-11-21 00:46:16,644 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2bd5aec7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:46:16, skipping insertion in model container [2021-11-21 00:46:16,645 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 12:46:16" (1/1) ... [2021-11-21 00:46:16,653 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 00:46:16,674 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 00:46:16,870 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_258d8b08-8b9f-46ea-8f94-baa50fa31fe4/sv-benchmarks/c/float-newlib/float_req_bl_1232b.c[1657,1670] [2021-11-21 00:46:16,873 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 00:46:16,886 INFO L203 MainTranslator]: Completed pre-run [2021-11-21 00:46:16,910 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_258d8b08-8b9f-46ea-8f94-baa50fa31fe4/sv-benchmarks/c/float-newlib/float_req_bl_1232b.c[1657,1670] [2021-11-21 00:46:16,911 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 00:46:16,929 INFO L208 MainTranslator]: Completed translation [2021-11-21 00:46:16,929 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:46:16 WrapperNode [2021-11-21 00:46:16,930 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 00:46:16,931 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-21 00:46:16,931 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-21 00:46:16,931 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-21 00:46:16,948 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:46:16" (1/1) ... [2021-11-21 00:46:16,990 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:46:16" (1/1) ... [2021-11-21 00:46:17,013 INFO L137 Inliner]: procedures = 21, calls = 19, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 65 [2021-11-21 00:46:17,013 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-21 00:46:17,014 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-21 00:46:17,015 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-21 00:46:17,015 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-21 00:46:17,025 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:46:16" (1/1) ... [2021-11-21 00:46:17,025 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:46:16" (1/1) ... [2021-11-21 00:46:17,030 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:46:16" (1/1) ... [2021-11-21 00:46:17,030 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:46:16" (1/1) ... [2021-11-21 00:46:17,041 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:46:16" (1/1) ... [2021-11-21 00:46:17,046 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:46:16" (1/1) ... [2021-11-21 00:46:17,049 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:46:16" (1/1) ... [2021-11-21 00:46:17,053 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-21 00:46:17,054 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-21 00:46:17,054 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-21 00:46:17,055 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-21 00:46:17,055 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:46:16" (1/1) ... [2021-11-21 00:46:17,064 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 00:46:17,079 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_258d8b08-8b9f-46ea-8f94-baa50fa31fe4/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:46:17,094 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_258d8b08-8b9f-46ea-8f94-baa50fa31fe4/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-21 00:46:17,121 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_258d8b08-8b9f-46ea-8f94-baa50fa31fe4/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-21 00:46:17,143 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-21 00:46:17,144 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-21 00:46:17,144 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-21 00:46:17,144 INFO L130 BoogieDeclarations]: Found specification of procedure __fpclassify_float [2021-11-21 00:46:17,144 INFO L138 BoogieDeclarations]: Found implementation of procedure __fpclassify_float [2021-11-21 00:46:17,145 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-21 00:46:17,145 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-21 00:46:17,145 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-21 00:46:17,145 INFO L130 BoogieDeclarations]: Found specification of procedure write~intFLOATTYPE4 [2021-11-21 00:46:17,145 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-21 00:46:17,225 INFO L236 CfgBuilder]: Building ICFG [2021-11-21 00:46:17,226 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-21 00:46:17,402 INFO L277 CfgBuilder]: Performing block encoding [2021-11-21 00:46:17,409 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-21 00:46:17,410 INFO L301 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-21 00:46:17,412 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 12:46:17 BoogieIcfgContainer [2021-11-21 00:46:17,412 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-21 00:46:17,414 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-21 00:46:17,415 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-21 00:46:17,418 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-21 00:46:17,418 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 12:46:16" (1/3) ... [2021-11-21 00:46:17,420 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27c31ceb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 12:46:17, skipping insertion in model container [2021-11-21 00:46:17,420 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:46:16" (2/3) ... [2021-11-21 00:46:17,420 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27c31ceb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 12:46:17, skipping insertion in model container [2021-11-21 00:46:17,421 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 12:46:17" (3/3) ... [2021-11-21 00:46:17,422 INFO L111 eAbstractionObserver]: Analyzing ICFG float_req_bl_1232b.c [2021-11-21 00:46:17,429 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-21 00:46:17,429 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-21 00:46:17,529 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-21 00:46:17,536 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 [2021-11-21 00:46:17,537 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-21 00:46:17,575 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) [2021-11-21 00:46:17,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-21 00:46:17,581 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:46:17,582 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:46:17,582 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:46:17,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:46:17,588 INFO L85 PathProgramCache]: Analyzing trace with hash 1826258672, now seen corresponding path program 1 times [2021-11-21 00:46:17,600 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 00:46:17,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [248286281] [2021-11-21 00:46:17,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:46:17,602 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 00:46:17,602 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_258d8b08-8b9f-46ea-8f94-baa50fa31fe4/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 00:46:17,605 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_258d8b08-8b9f-46ea-8f94-baa50fa31fe4/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 00:46:17,664 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_258d8b08-8b9f-46ea-8f94-baa50fa31fe4/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-21 00:46:17,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:46:17,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-21 00:46:17,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:46:17,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:46:17,850 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:46:17,931 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:46:17,932 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 00:46:17,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [248286281] [2021-11-21 00:46:17,934 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [248286281] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 00:46:17,934 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:46:17,935 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-21 00:46:17,950 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700151405] [2021-11-21 00:46:17,951 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 00:46:17,956 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-21 00:46:17,957 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 00:46:18,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-21 00:46:18,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-21 00:46:18,023 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) [2021-11-21 00:46:18,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:46:18,057 INFO L93 Difference]: Finished difference Result 55 states and 82 transitions. [2021-11-21 00:46:18,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-21 00:46:18,059 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 [2021-11-21 00:46:18,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:46:18,070 INFO L225 Difference]: With dead ends: 55 [2021-11-21 00:46:18,070 INFO L226 Difference]: Without dead ends: 26 [2021-11-21 00:46:18,074 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-21 00:46:18,083 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 [2021-11-21 00:46:18,085 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] [2021-11-21 00:46:18,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-11-21 00:46:18,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-11-21 00:46:18,161 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) [2021-11-21 00:46:18,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 34 transitions. [2021-11-21 00:46:18,165 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 34 transitions. Word has length 13 [2021-11-21 00:46:18,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:46:18,167 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 34 transitions. [2021-11-21 00:46:18,167 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) [2021-11-21 00:46:18,168 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 34 transitions. [2021-11-21 00:46:18,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-21 00:46:18,174 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:46:18,174 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:46:18,197 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_258d8b08-8b9f-46ea-8f94-baa50fa31fe4/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-21 00:46:18,389 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_258d8b08-8b9f-46ea-8f94-baa50fa31fe4/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 00:46:18,389 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:46:18,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:46:18,391 INFO L85 PathProgramCache]: Analyzing trace with hash -503165124, now seen corresponding path program 1 times [2021-11-21 00:46:18,391 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 00:46:18,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1743910741] [2021-11-21 00:46:18,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:46:18,392 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 00:46:18,392 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_258d8b08-8b9f-46ea-8f94-baa50fa31fe4/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 00:46:18,395 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_258d8b08-8b9f-46ea-8f94-baa50fa31fe4/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 00:46:18,429 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_258d8b08-8b9f-46ea-8f94-baa50fa31fe4/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-21 00:46:18,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:46:18,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-21 00:46:18,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:46:18,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:46:18,546 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:46:18,657 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:46:18,657 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 00:46:18,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1743910741] [2021-11-21 00:46:18,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1743910741] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 00:46:18,658 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:46:18,658 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-21 00:46:18,659 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679075225] [2021-11-21 00:46:18,659 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 00:46:18,660 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-21 00:46:18,661 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 00:46:18,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-21 00:46:18,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-21 00:46:18,663 INFO L87 Difference]: Start difference. First operand 26 states and 34 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-21 00:46:18,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:46:18,716 INFO L93 Difference]: Finished difference Result 41 states and 53 transitions. [2021-11-21 00:46:18,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 00:46:18,718 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 14 [2021-11-21 00:46:18,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:46:18,721 INFO L225 Difference]: With dead ends: 41 [2021-11-21 00:46:18,722 INFO L226 Difference]: Without dead ends: 32 [2021-11-21 00:46:18,729 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-21 00:46:18,731 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 0 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 00:46:18,733 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 123 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 00:46:18,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-11-21 00:46:18,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 29. [2021-11-21 00:46:18,750 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) [2021-11-21 00:46:18,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 38 transitions. [2021-11-21 00:46:18,753 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 38 transitions. Word has length 14 [2021-11-21 00:46:18,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:46:18,754 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 38 transitions. [2021-11-21 00:46:18,755 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-21 00:46:18,755 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 38 transitions. [2021-11-21 00:46:18,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-21 00:46:18,757 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:46:18,758 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:46:18,774 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_258d8b08-8b9f-46ea-8f94-baa50fa31fe4/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-21 00:46:18,971 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_258d8b08-8b9f-46ea-8f94-baa50fa31fe4/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 00:46:18,971 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:46:18,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:46:18,975 INFO L85 PathProgramCache]: Analyzing trace with hash -69350008, now seen corresponding path program 1 times [2021-11-21 00:46:18,976 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 00:46:18,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [604794104] [2021-11-21 00:46:18,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:46:18,980 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 00:46:18,980 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_258d8b08-8b9f-46ea-8f94-baa50fa31fe4/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 00:46:18,981 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_258d8b08-8b9f-46ea-8f94-baa50fa31fe4/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 00:46:19,016 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_258d8b08-8b9f-46ea-8f94-baa50fa31fe4/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-21 00:46:19,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:46:19,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-21 00:46:19,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:46:19,339 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:46:19,340 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:46:20,093 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:46:20,094 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 00:46:20,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [604794104] [2021-11-21 00:46:20,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [604794104] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 00:46:20,095 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:46:20,095 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 9 [2021-11-21 00:46:20,095 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028943604] [2021-11-21 00:46:20,096 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 00:46:20,097 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-21 00:46:20,097 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 00:46:20,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-21 00:46:20,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-21 00:46:20,098 INFO L87 Difference]: Start difference. First operand 29 states and 38 transitions. Second operand has 9 states, 8 states have (on average 2.875) internal successors, (23), 9 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-21 00:46:20,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:46:20,292 INFO L93 Difference]: Finished difference Result 56 states and 72 transitions. [2021-11-21 00:46:20,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 00:46:20,293 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.875) internal successors, (23), 9 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2021-11-21 00:46:20,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:46:20,294 INFO L225 Difference]: With dead ends: 56 [2021-11-21 00:46:20,295 INFO L226 Difference]: Without dead ends: 30 [2021-11-21 00:46:20,295 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-11-21 00:46:20,297 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 38 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 8 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:46:20,298 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 99 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 61 Invalid, 0 Unknown, 8 Unchecked, 0.1s Time] [2021-11-21 00:46:20,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-11-21 00:46:20,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2021-11-21 00:46:20,304 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) [2021-11-21 00:46:20,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 35 transitions. [2021-11-21 00:46:20,306 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 35 transitions. Word has length 17 [2021-11-21 00:46:20,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:46:20,306 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 35 transitions. [2021-11-21 00:46:20,307 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.875) internal successors, (23), 9 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-21 00:46:20,307 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 35 transitions. [2021-11-21 00:46:20,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-21 00:46:20,308 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:46:20,308 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:46:20,328 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_258d8b08-8b9f-46ea-8f94-baa50fa31fe4/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-21 00:46:20,523 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_258d8b08-8b9f-46ea-8f94-baa50fa31fe4/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 00:46:20,523 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:46:20,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:46:20,524 INFO L85 PathProgramCache]: Analyzing trace with hash -538621340, now seen corresponding path program 1 times [2021-11-21 00:46:20,524 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 00:46:20,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1528198019] [2021-11-21 00:46:20,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:46:20,525 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 00:46:20,525 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_258d8b08-8b9f-46ea-8f94-baa50fa31fe4/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 00:46:20,526 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_258d8b08-8b9f-46ea-8f94-baa50fa31fe4/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 00:46:20,565 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_258d8b08-8b9f-46ea-8f94-baa50fa31fe4/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-21 00:46:20,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:46:20,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-21 00:46:20,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:46:20,666 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-21 00:46:20,667 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:46:20,750 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-21 00:46:20,750 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 00:46:20,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1528198019] [2021-11-21 00:46:20,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1528198019] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 00:46:20,755 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:46:20,755 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-21 00:46:20,755 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659672680] [2021-11-21 00:46:20,755 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 00:46:20,756 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-21 00:46:20,756 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 00:46:20,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-21 00:46:20,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-21 00:46:20,759 INFO L87 Difference]: Start difference. First operand 28 states and 35 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 4 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-21 00:46:20,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:46:20,797 INFO L93 Difference]: Finished difference Result 41 states and 50 transitions. [2021-11-21 00:46:20,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 00:46:20,798 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 4 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 22 [2021-11-21 00:46:20,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:46:20,799 INFO L225 Difference]: With dead ends: 41 [2021-11-21 00:46:20,800 INFO L226 Difference]: Without dead ends: 32 [2021-11-21 00:46:20,800 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-21 00:46:20,801 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 0 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 00:46:20,802 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 119 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 00:46:20,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-11-21 00:46:20,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2021-11-21 00:46:20,807 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, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-21 00:46:20,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 38 transitions. [2021-11-21 00:46:20,809 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 38 transitions. Word has length 22 [2021-11-21 00:46:20,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:46:20,809 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 38 transitions. [2021-11-21 00:46:20,810 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 4 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-21 00:46:20,810 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 38 transitions. [2021-11-21 00:46:20,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-21 00:46:20,811 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:46:20,811 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:46:20,829 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_258d8b08-8b9f-46ea-8f94-baa50fa31fe4/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-21 00:46:21,028 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_258d8b08-8b9f-46ea-8f94-baa50fa31fe4/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 00:46:21,029 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:46:21,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:46:21,029 INFO L85 PathProgramCache]: Analyzing trace with hash -636835510, now seen corresponding path program 1 times [2021-11-21 00:46:21,030 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 00:46:21,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1383333131] [2021-11-21 00:46:21,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:46:21,030 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 00:46:21,031 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_258d8b08-8b9f-46ea-8f94-baa50fa31fe4/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 00:46:21,032 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_258d8b08-8b9f-46ea-8f94-baa50fa31fe4/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 00:46:21,037 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_258d8b08-8b9f-46ea-8f94-baa50fa31fe4/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-21 00:46:21,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:46:21,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-21 00:46:21,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:46:21,209 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-21 00:46:21,209 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:46:21,308 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-21 00:46:21,309 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 00:46:21,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1383333131] [2021-11-21 00:46:21,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1383333131] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 00:46:21,309 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:46:21,309 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-21 00:46:21,309 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627163212] [2021-11-21 00:46:21,309 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 00:46:21,310 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 00:46:21,310 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 00:46:21,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 00:46:21,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-21 00:46:21,311 INFO L87 Difference]: Start difference. First operand 31 states and 38 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-21 00:46:21,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:46:21,319 INFO L93 Difference]: Finished difference Result 41 states and 48 transitions. [2021-11-21 00:46:21,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:46:21,320 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 24 [2021-11-21 00:46:21,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:46:21,321 INFO L225 Difference]: With dead ends: 41 [2021-11-21 00:46:21,322 INFO L226 Difference]: Without dead ends: 31 [2021-11-21 00:46:21,322 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-21 00:46:21,323 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 24 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 45 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 [2021-11-21 00:46:21,324 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 45 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 00:46:21,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-11-21 00:46:21,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-11-21 00:46:21,329 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, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-21 00:46:21,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 37 transitions. [2021-11-21 00:46:21,330 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 37 transitions. Word has length 24 [2021-11-21 00:46:21,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:46:21,331 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 37 transitions. [2021-11-21 00:46:21,331 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-21 00:46:21,331 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 37 transitions. [2021-11-21 00:46:21,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-21 00:46:21,332 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:46:21,333 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:46:21,354 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_258d8b08-8b9f-46ea-8f94-baa50fa31fe4/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-21 00:46:21,554 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_258d8b08-8b9f-46ea-8f94-baa50fa31fe4/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 00:46:21,554 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:46:21,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:46:21,555 INFO L85 PathProgramCache]: Analyzing trace with hash -579577208, now seen corresponding path program 1 times [2021-11-21 00:46:21,555 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 00:46:21,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [678482720] [2021-11-21 00:46:21,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:46:21,556 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 00:46:21,556 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_258d8b08-8b9f-46ea-8f94-baa50fa31fe4/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 00:46:21,557 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_258d8b08-8b9f-46ea-8f94-baa50fa31fe4/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 00:46:21,588 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_258d8b08-8b9f-46ea-8f94-baa50fa31fe4/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-21 00:46:21,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:46:21,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-21 00:46:21,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:46:21,745 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-21 00:46:21,745 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:46:21,859 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-21 00:46:21,859 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 00:46:21,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [678482720] [2021-11-21 00:46:21,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [678482720] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 00:46:21,859 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:46:21,859 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 9 [2021-11-21 00:46:21,860 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662909421] [2021-11-21 00:46:21,860 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 00:46:21,860 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-21 00:46:21,860 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 00:46:21,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-21 00:46:21,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-11-21 00:46:21,861 INFO L87 Difference]: Start difference. First operand 31 states and 37 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-21 00:46:21,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:46:21,967 INFO L93 Difference]: Finished difference Result 43 states and 48 transitions. [2021-11-21 00:46:21,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-21 00:46:21,968 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 24 [2021-11-21 00:46:21,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:46:21,969 INFO L225 Difference]: With dead ends: 43 [2021-11-21 00:46:21,969 INFO L226 Difference]: Without dead ends: 40 [2021-11-21 00:46:21,969 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2021-11-21 00:46:21,970 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 53 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:46:21,971 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 172 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 00:46:21,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-11-21 00:46:21,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 33. [2021-11-21 00:46:21,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 28 states have internal predecessors, (33), 2 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-21 00:46:21,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions. [2021-11-21 00:46:21,985 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 24 [2021-11-21 00:46:21,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:46:21,987 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 39 transitions. [2021-11-21 00:46:21,988 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-21 00:46:21,988 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2021-11-21 00:46:21,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-21 00:46:21,990 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:46:21,991 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] [2021-11-21 00:46:22,012 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_258d8b08-8b9f-46ea-8f94-baa50fa31fe4/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-21 00:46:22,211 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_258d8b08-8b9f-46ea-8f94-baa50fa31fe4/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 00:46:22,212 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:46:22,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:46:22,212 INFO L85 PathProgramCache]: Analyzing trace with hash 2027254888, now seen corresponding path program 1 times [2021-11-21 00:46:22,212 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 00:46:22,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2058148254] [2021-11-21 00:46:22,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:46:22,213 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 00:46:22,213 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_258d8b08-8b9f-46ea-8f94-baa50fa31fe4/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 00:46:22,214 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_258d8b08-8b9f-46ea-8f94-baa50fa31fe4/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 00:46:22,215 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_258d8b08-8b9f-46ea-8f94-baa50fa31fe4/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-21 00:46:22,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:46:22,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-21 00:46:22,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:46:22,474 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 00:46:22,475 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:46:22,774 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 00:46:22,774 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 00:46:22,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2058148254] [2021-11-21 00:46:22,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2058148254] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 00:46:22,775 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:46:22,775 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 9 [2021-11-21 00:46:22,775 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456329392] [2021-11-21 00:46:22,775 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 00:46:22,776 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-21 00:46:22,776 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 00:46:22,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-21 00:46:22,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-21 00:46:22,777 INFO L87 Difference]: Start difference. First operand 33 states and 39 transitions. Second operand has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 9 states have internal predecessors, (29), 1 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-21 00:46:23,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:46:23,100 INFO L93 Difference]: Finished difference Result 47 states and 52 transitions. [2021-11-21 00:46:23,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-21 00:46:23,102 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 9 states have internal predecessors, (29), 1 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 25 [2021-11-21 00:46:23,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:46:23,103 INFO L225 Difference]: With dead ends: 47 [2021-11-21 00:46:23,103 INFO L226 Difference]: Without dead ends: 26 [2021-11-21 00:46:23,103 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 40 SyntacticMatches, 4 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-11-21 00:46:23,105 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 37 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 7 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 00:46:23,105 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 70 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 7 Unchecked, 0.0s Time] [2021-11-21 00:46:23,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-11-21 00:46:23,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-11-21 00:46:23,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 21 states have (on average 1.0476190476190477) internal successors, (22), 22 states have internal predecessors, (22), 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) [2021-11-21 00:46:23,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2021-11-21 00:46:23,110 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 25 [2021-11-21 00:46:23,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:46:23,111 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2021-11-21 00:46:23,111 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 9 states have internal predecessors, (29), 1 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-21 00:46:23,111 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2021-11-21 00:46:23,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-21 00:46:23,112 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:46:23,113 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] [2021-11-21 00:46:23,140 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_258d8b08-8b9f-46ea-8f94-baa50fa31fe4/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-21 00:46:23,327 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_258d8b08-8b9f-46ea-8f94-baa50fa31fe4/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 00:46:23,327 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:46:23,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:46:23,328 INFO L85 PathProgramCache]: Analyzing trace with hash 1580504541, now seen corresponding path program 1 times [2021-11-21 00:46:23,328 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 00:46:23,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1366515991] [2021-11-21 00:46:23,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:46:23,328 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 00:46:23,329 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_258d8b08-8b9f-46ea-8f94-baa50fa31fe4/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 00:46:23,329 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_258d8b08-8b9f-46ea-8f94-baa50fa31fe4/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 00:46:23,337 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_258d8b08-8b9f-46ea-8f94-baa50fa31fe4/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-21 00:46:23,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-21 00:46:23,422 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-21 00:46:23,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-21 00:46:23,506 INFO L133 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2021-11-21 00:46:23,507 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-11-21 00:46:23,508 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-21 00:46:23,548 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_258d8b08-8b9f-46ea-8f94-baa50fa31fe4/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-21 00:46:23,710 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_258d8b08-8b9f-46ea-8f94-baa50fa31fe4/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 00:46:23,713 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:46:23,716 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-21 00:46:23,752 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.11 12:46:23 BoogieIcfgContainer [2021-11-21 00:46:23,753 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-21 00:46:23,753 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-21 00:46:23,753 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-21 00:46:23,753 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-21 00:46:23,754 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 12:46:17" (3/4) ... [2021-11-21 00:46:23,756 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-11-21 00:46:23,801 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_258d8b08-8b9f-46ea-8f94-baa50fa31fe4/bin/utaipan-TEXQjIfE4P/witness.graphml [2021-11-21 00:46:23,801 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-21 00:46:23,802 INFO L158 Benchmark]: Toolchain (without parser) took 7166.18ms. Allocated memory was 60.8MB in the beginning and 75.5MB in the end (delta: 14.7MB). Free memory was 38.8MB in the beginning and 38.3MB in the end (delta: 560.4kB). Peak memory consumption was 14.4MB. Max. memory is 16.1GB. [2021-11-21 00:46:23,802 INFO L158 Benchmark]: CDTParser took 0.26ms. Allocated memory is still 60.8MB. Free memory was 41.0MB in the beginning and 41.0MB in the end (delta: 42.9kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-21 00:46:23,803 INFO L158 Benchmark]: CACSL2BoogieTranslator took 291.98ms. Allocated memory is still 60.8MB. Free memory was 38.6MB in the beginning and 27.7MB in the end (delta: 10.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-21 00:46:23,803 INFO L158 Benchmark]: Boogie Procedure Inliner took 83.00ms. Allocated memory is still 60.8MB. Free memory was 27.6MB in the beginning and 43.2MB in the end (delta: -15.6MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-11-21 00:46:23,804 INFO L158 Benchmark]: Boogie Preprocessor took 38.85ms. Allocated memory is still 60.8MB. Free memory was 43.2MB in the beginning and 41.8MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-21 00:46:23,804 INFO L158 Benchmark]: RCFGBuilder took 358.29ms. Allocated memory is still 60.8MB. Free memory was 41.8MB in the beginning and 30.5MB in the end (delta: 11.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-21 00:46:23,804 INFO L158 Benchmark]: TraceAbstraction took 6338.36ms. Allocated memory was 60.8MB in the beginning and 75.5MB in the end (delta: 14.7MB). Free memory was 30.0MB in the beginning and 40.3MB in the end (delta: -10.4MB). Peak memory consumption was 4.8MB. Max. memory is 16.1GB. [2021-11-21 00:46:23,805 INFO L158 Benchmark]: Witness Printer took 48.15ms. Allocated memory is still 75.5MB. Free memory was 40.3MB in the beginning and 38.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-21 00:46:23,807 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26ms. Allocated memory is still 60.8MB. Free memory was 41.0MB in the beginning and 41.0MB in the end (delta: 42.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 291.98ms. Allocated memory is still 60.8MB. Free memory was 38.6MB in the beginning and 27.7MB in the end (delta: 10.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 83.00ms. Allocated memory is still 60.8MB. Free memory was 27.6MB in the beginning and 43.2MB in the end (delta: -15.6MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 38.85ms. Allocated memory is still 60.8MB. Free memory was 43.2MB in the beginning and 41.8MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 358.29ms. Allocated memory is still 60.8MB. Free memory was 41.8MB in the beginning and 30.5MB in the end (delta: 11.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 6338.36ms. Allocated memory was 60.8MB in the beginning and 75.5MB in the end (delta: 14.7MB). Free memory was 30.0MB in the beginning and 40.3MB in the end (delta: -10.4MB). Peak memory consumption was 4.8MB. Max. memory is 16.1GB. * Witness Printer took 48.15ms. Allocated memory is still 75.5MB. Free memory was 40.3MB in the beginning and 38.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. 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: 72]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L66] float x = -0.0f; [L67] float y = 0.0f; [L68] CALL, EXPR fmin_float(x, y) [L38] CALL, EXPR __fpclassify_float(x) VAL [\old(x)=0.0] [L15] __uint32_t w; VAL [\old(x)=0.0, x=0.0] [L18] ieee_float_shape_type gf_u; [L19] gf_u.value = (x) [L20] EXPR gf_u.word [L20] (w) = gf_u.word [L23] COND TRUE w == 0x00000000 || w == 0x80000000 [L24] return 2; VAL [\old(x)=0.0, \result=2, w=2147483648, x=0.0] [L38] RET, EXPR __fpclassify_float(x) VAL [\old(x)=0.0, \old(y)=0.0, __fpclassify_float(x)=2, x=0.0, y=0.0] [L38] COND FALSE !(__fpclassify_float(x) == 0) [L40] CALL, EXPR __fpclassify_float(y) VAL [\old(x)=0.0] [L15] __uint32_t w; VAL [\old(x)=0.0, x=0.0] [L18] ieee_float_shape_type gf_u; [L19] gf_u.value = (x) [L20] EXPR gf_u.word [L20] (w) = gf_u.word [L23] COND TRUE w == 0x00000000 || w == 0x80000000 [L24] return 2; VAL [\old(x)=0.0, \result=2, w=0, x=0.0] [L40] RET, EXPR __fpclassify_float(y) VAL [\old(x)=0.0, \old(y)=0.0, __fpclassify_float(y)=2, x=0.0, y=0.0] [L40] COND FALSE !(__fpclassify_float(y) == 0) [L43] 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] [L43] return x < y ? x : y; [L68] RET, EXPR fmin_float(x, y) [L68] float res = fmin_float(x, y); [L71] EXPR res == -0.0f && __signbit_float(res) == 1 [L71] CALL, EXPR __signbit_float(res) [L47] __uint32_t w; VAL [\old(x)=0.0, x=0.0] [L50] ieee_float_shape_type gf_u; [L51] gf_u.value = (x) [L52] EXPR gf_u.word [L52] (w) = gf_u.word [L55] return (w & 0x80000000) != 0; VAL [\old(x)=0.0, \result=0, w=0, x=0.0] [L71] RET, EXPR __signbit_float(res) [L71] EXPR res == -0.0f && __signbit_float(res) == 1 VAL [__signbit_float(res)=0, res=0.0, res == -0.0f && __signbit_float(res) == 1=0, x=0.0, y=0.0] [L71] COND TRUE !(res == -0.0f && __signbit_float(res) == 1) [L72] 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: 6.2s, OverallIterations: 8, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 156 SdHoareTripleChecker+Valid, 0.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 152 mSDsluCounter, 665 SdHoareTripleChecker+Invalid, 0.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 15 IncrementalHoareTripleChecker+Unchecked, 462 mSDsCounter, 10 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 133 IncrementalHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 10 mSolverCounterUnsat, 203 mSDtfsCounter, 133 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 275 GetRequests, 231 SyntacticMatches, 5 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=33occurred in iteration=6, InterpolantAutomatonStates: 37, 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, 7 MinimizatonAttempts, 13 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 2.5s InterpolantComputationTime, 167 NumberOfCodeBlocks, 167 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 264 ConstructedInterpolants, 12 QuantifiedInterpolants, 677 SizeOfPredicates, 23 NumberOfNonLiveVariables, 441 ConjunctsInSsa, 40 ConjunctsInUnsatCore, 14 InterpolantComputations, 14 PerfectInterpolantSequences, 48/48 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! [2021-11-21 00:46:23,855 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_258d8b08-8b9f-46ea-8f94-baa50fa31fe4/bin/utaipan-TEXQjIfE4P/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