./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/float-newlib/double_req_bl_1252b.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc411a8b-8305-42c9-9ceb-d6f51c654a58/bin/utaipan-WLngWcDbfI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc411a8b-8305-42c9-9ceb-d6f51c654a58/bin/utaipan-WLngWcDbfI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc411a8b-8305-42c9-9ceb-d6f51c654a58/bin/utaipan-WLngWcDbfI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc411a8b-8305-42c9-9ceb-d6f51c654a58/bin/utaipan-WLngWcDbfI/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-newlib/double_req_bl_1252b.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc411a8b-8305-42c9-9ceb-d6f51c654a58/bin/utaipan-WLngWcDbfI/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc411a8b-8305-42c9-9ceb-d6f51c654a58/bin/utaipan-WLngWcDbfI --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 a6231fe9945ed231781bef28be0893007c672b08 ........................................................................................................................................................................................................................................................................................................... Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc411a8b-8305-42c9-9ceb-d6f51c654a58/bin/utaipan-WLngWcDbfI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc411a8b-8305-42c9-9ceb-d6f51c654a58/bin/utaipan-WLngWcDbfI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc411a8b-8305-42c9-9ceb-d6f51c654a58/bin/utaipan-WLngWcDbfI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc411a8b-8305-42c9-9ceb-d6f51c654a58/bin/utaipan-WLngWcDbfI/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-newlib/double_req_bl_1252b.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc411a8b-8305-42c9-9ceb-d6f51c654a58/bin/utaipan-WLngWcDbfI/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc411a8b-8305-42c9-9ceb-d6f51c654a58/bin/utaipan-WLngWcDbfI --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 a6231fe9945ed231781bef28be0893007c672b08 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.0-7b2dab5 [2021-10-11 02:23:55,270 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-11 02:23:55,272 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-11 02:23:55,307 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-11 02:23:55,308 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-11 02:23:55,314 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-11 02:23:55,315 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-11 02:23:55,318 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-11 02:23:55,320 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-11 02:23:55,321 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-11 02:23:55,323 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-11 02:23:55,327 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-11 02:23:55,328 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-11 02:23:55,337 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-11 02:23:55,338 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-11 02:23:55,341 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-11 02:23:55,343 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-11 02:23:55,346 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-11 02:23:55,350 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-11 02:23:55,361 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-11 02:23:55,363 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-11 02:23:55,364 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-11 02:23:55,368 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-11 02:23:55,369 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-11 02:23:55,378 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-11 02:23:55,378 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-11 02:23:55,379 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-11 02:23:55,381 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-11 02:23:55,382 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-11 02:23:55,384 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-11 02:23:55,384 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-11 02:23:55,385 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-11 02:23:55,387 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-11 02:23:55,389 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-11 02:23:55,390 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-11 02:23:55,390 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-11 02:23:55,391 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-11 02:23:55,392 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-11 02:23:55,392 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-11 02:23:55,393 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-11 02:23:55,394 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-11 02:23:55,396 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc411a8b-8305-42c9-9ceb-d6f51c654a58/bin/utaipan-WLngWcDbfI/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-11 02:23:55,434 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-11 02:23:55,434 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-11 02:23:55,442 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-11 02:23:55,443 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-11 02:23:55,443 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-11 02:23:55,443 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-11 02:23:55,443 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-11 02:23:55,444 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-11 02:23:55,444 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-11 02:23:55,444 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-11 02:23:55,444 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-11 02:23:55,444 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-11 02:23:55,445 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-11 02:23:55,445 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-11 02:23:55,445 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-11 02:23:55,446 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-11 02:23:55,446 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-11 02:23:55,446 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-11 02:23:55,447 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-11 02:23:55,447 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-11 02:23:55,447 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-11 02:23:55,447 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-11 02:23:55,448 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-11 02:23:55,448 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-11 02:23:55,448 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-11 02:23:55,448 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-11 02:23:55,448 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-11 02:23:55,449 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-11 02:23:55,449 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-11 02:23:55,449 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-11 02:23:55,449 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-11 02:23:55,450 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-11 02:23:55,450 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-11 02:23:55,450 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-11 02:23:55,450 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-11 02:23:55,450 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-11 02:23:55,451 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-11 02:23:55,451 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-11 02:23:55,451 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-11 02:23:55,451 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_cc411a8b-8305-42c9-9ceb-d6f51c654a58/bin/utaipan-WLngWcDbfI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc411a8b-8305-42c9-9ceb-d6f51c654a58/bin/utaipan-WLngWcDbfI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a6231fe9945ed231781bef28be0893007c672b08 [2021-10-11 02:23:55,708 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-11 02:23:55,730 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-11 02:23:55,734 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-11 02:23:55,735 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-11 02:23:55,736 INFO L275 PluginConnector]: CDTParser initialized [2021-10-11 02:23:55,737 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc411a8b-8305-42c9-9ceb-d6f51c654a58/bin/utaipan-WLngWcDbfI/../../sv-benchmarks/c/float-newlib/double_req_bl_1252b.c [2021-10-11 02:23:55,813 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc411a8b-8305-42c9-9ceb-d6f51c654a58/bin/utaipan-WLngWcDbfI/data/da46ef728/d85a28bd37fd45668a8c9f5475ed7021/FLAGa6bd21b34 [2021-10-11 02:23:56,270 INFO L306 CDTParser]: Found 1 translation units. [2021-10-11 02:23:56,271 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc411a8b-8305-42c9-9ceb-d6f51c654a58/sv-benchmarks/c/float-newlib/double_req_bl_1252b.c [2021-10-11 02:23:56,278 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc411a8b-8305-42c9-9ceb-d6f51c654a58/bin/utaipan-WLngWcDbfI/data/da46ef728/d85a28bd37fd45668a8c9f5475ed7021/FLAGa6bd21b34 [2021-10-11 02:23:56,661 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc411a8b-8305-42c9-9ceb-d6f51c654a58/bin/utaipan-WLngWcDbfI/data/da46ef728/d85a28bd37fd45668a8c9f5475ed7021 [2021-10-11 02:23:56,663 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-11 02:23:56,665 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-11 02:23:56,666 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-11 02:23:56,667 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-11 02:23:56,670 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-11 02:23:56,670 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:23:56" (1/1) ... [2021-10-11 02:23:56,672 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@55cc6634 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:23:56, skipping insertion in model container [2021-10-11 02:23:56,673 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:23:56" (1/1) ... [2021-10-11 02:23:56,680 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-11 02:23:56,697 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-11 02:23:56,904 WARN L226 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_cc411a8b-8305-42c9-9ceb-d6f51c654a58/sv-benchmarks/c/float-newlib/double_req_bl_1252b.c[2154,2167] [2021-10-11 02:23:56,907 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:23:56,915 INFO L203 MainTranslator]: Completed pre-run [2021-10-11 02:23:56,939 WARN L226 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_cc411a8b-8305-42c9-9ceb-d6f51c654a58/sv-benchmarks/c/float-newlib/double_req_bl_1252b.c[2154,2167] [2021-10-11 02:23:56,940 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:23:56,954 INFO L208 MainTranslator]: Completed translation [2021-10-11 02:23:56,954 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:23:56 WrapperNode [2021-10-11 02:23:56,954 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-11 02:23:56,956 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-11 02:23:56,956 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-11 02:23:56,956 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-11 02:23:56,964 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:23:56" (1/1) ... [2021-10-11 02:23:56,973 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:23:56" (1/1) ... [2021-10-11 02:23:57,012 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-11 02:23:57,013 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-11 02:23:57,013 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-11 02:23:57,013 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-11 02:23:57,027 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:23:56" (1/1) ... [2021-10-11 02:23:57,027 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:23:56" (1/1) ... [2021-10-11 02:23:57,045 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:23:56" (1/1) ... [2021-10-11 02:23:57,046 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:23:56" (1/1) ... [2021-10-11 02:23:57,054 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:23:56" (1/1) ... [2021-10-11 02:23:57,071 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:23:56" (1/1) ... [2021-10-11 02:23:57,072 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:23:56" (1/1) ... [2021-10-11 02:23:57,075 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-11 02:23:57,076 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-11 02:23:57,076 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-11 02:23:57,077 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-11 02:23:57,078 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:23:56" (1/1) ... No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc411a8b-8305-42c9-9ceb-d6f51c654a58/bin/utaipan-WLngWcDbfI/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-11 02:23:57,182 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-11 02:23:57,183 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-11 02:23:57,183 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2021-10-11 02:23:57,183 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-11 02:23:57,183 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-11 02:23:57,183 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-11 02:23:57,185 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-11 02:23:57,927 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-11 02:23:57,928 INFO L299 CfgBuilder]: Removed 18 assume(true) statements. [2021-10-11 02:23:57,930 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:23:57 BoogieIcfgContainer [2021-10-11 02:23:57,930 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-11 02:23:57,932 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-11 02:23:57,933 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-11 02:23:57,937 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-11 02:23:57,937 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 02:23:56" (1/3) ... [2021-10-11 02:23:57,938 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2fc81dc9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:23:57, skipping insertion in model container [2021-10-11 02:23:57,938 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:23:56" (2/3) ... [2021-10-11 02:23:57,939 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2fc81dc9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:23:57, skipping insertion in model container [2021-10-11 02:23:57,939 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:23:57" (3/3) ... [2021-10-11 02:23:57,941 INFO L111 eAbstractionObserver]: Analyzing ICFG double_req_bl_1252b.c [2021-10-11 02:23:57,956 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-11 02:23:57,960 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-10-11 02:23:57,973 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-11 02:23:58,000 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-10-11 02:23:58,000 INFO L378 AbstractCegarLoop]: Hoare is true [2021-10-11 02:23:58,000 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-10-11 02:23:58,000 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-10-11 02:23:58,001 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-10-11 02:23:58,001 INFO L382 AbstractCegarLoop]: Difference is false [2021-10-11 02:23:58,001 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-10-11 02:23:58,001 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-10-11 02:23:58,013 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2021-10-11 02:23:58,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-11 02:23:58,018 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:23:58,018 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:23:58,019 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:23:58,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:23:58,025 INFO L82 PathProgramCache]: Analyzing trace with hash 1433219361, now seen corresponding path program 1 times [2021-10-11 02:23:58,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:23:58,035 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438742054] [2021-10-11 02:23:58,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:23:58,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:23:58,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:23:58,182 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438742054] [2021-10-11 02:23:58,183 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:23:58,183 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-11 02:23:58,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307716195] [2021-10-11 02:23:58,188 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-10-11 02:23:58,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:23:58,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-11 02:23:58,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-11 02:23:58,205 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 2 states. [2021-10-11 02:23:58,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:23:58,222 INFO L93 Difference]: Finished difference Result 35 states and 51 transitions. [2021-10-11 02:23:58,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-11 02:23:58,224 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 8 [2021-10-11 02:23:58,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:23:58,233 INFO L225 Difference]: With dead ends: 35 [2021-10-11 02:23:58,233 INFO L226 Difference]: Without dead ends: 16 [2021-10-11 02:23:58,236 INFO L677 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 [2021-10-11 02:23:58,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-10-11 02:23:58,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-10-11 02:23:58,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2021-10-11 02:23:58,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2021-10-11 02:23:58,271 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 8 [2021-10-11 02:23:58,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:23:58,271 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2021-10-11 02:23:58,271 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2021-10-11 02:23:58,272 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2021-10-11 02:23:58,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-11 02:23:58,272 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:23:58,273 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:23:58,273 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-11 02:23:58,273 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:23:58,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:23:58,274 INFO L82 PathProgramCache]: Analyzing trace with hash -2131701560, now seen corresponding path program 1 times [2021-10-11 02:23:58,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:23:58,275 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022008033] [2021-10-11 02:23:58,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:23:58,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-11 02:23:58,331 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-11 02:23:58,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-11 02:23:58,372 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-11 02:23:58,396 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-10-11 02:23:58,397 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-10-11 02:23:58,398 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-11 02:23:58,426 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.10 02:23:58 BoogieIcfgContainer [2021-10-11 02:23:58,426 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-11 02:23:58,427 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-11 02:23:58,427 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-11 02:23:58,427 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-11 02:23:58,428 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:23:57" (3/4) ... [2021-10-11 02:23:58,432 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-11 02:23:58,432 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-11 02:23:58,434 INFO L168 Benchmark]: Toolchain (without parser) took 1768.09 ms. Allocated memory was 92.3 MB in the beginning and 111.1 MB in the end (delta: 18.9 MB). Free memory was 58.6 MB in the beginning and 58.5 MB in the end (delta: 166.9 kB). Peak memory consumption was 18.3 MB. Max. memory is 16.1 GB. [2021-10-11 02:23:58,435 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 92.3 MB. Free memory was 62.1 MB in the beginning and 62.1 MB in the end (delta: 27.5 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:23:58,437 INFO L168 Benchmark]: CACSL2BoogieTranslator took 288.60 ms. Allocated memory is still 92.3 MB. Free memory was 58.4 MB in the beginning and 68.8 MB in the end (delta: -10.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-11 02:23:58,437 INFO L168 Benchmark]: Boogie Procedure Inliner took 56.58 ms. Allocated memory is still 92.3 MB. Free memory was 68.8 MB in the beginning and 67.1 MB in the end (delta: 1.7 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:23:58,438 INFO L168 Benchmark]: Boogie Preprocessor took 62.64 ms. Allocated memory is still 92.3 MB. Free memory was 67.1 MB in the beginning and 65.5 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-11 02:23:58,439 INFO L168 Benchmark]: RCFGBuilder took 854.19 ms. Allocated memory was 92.3 MB in the beginning and 111.1 MB in the end (delta: 18.9 MB). Free memory was 65.5 MB in the beginning and 82.0 MB in the end (delta: -16.5 MB). Peak memory consumption was 35.9 MB. Max. memory is 16.1 GB. [2021-10-11 02:23:58,440 INFO L168 Benchmark]: TraceAbstraction took 493.85 ms. Allocated memory is still 111.1 MB. Free memory was 82.0 MB in the beginning and 58.5 MB in the end (delta: 23.5 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.1 GB. [2021-10-11 02:23:58,441 INFO L168 Benchmark]: Witness Printer took 5.09 ms. Allocated memory is still 111.1 MB. Free memory is still 58.5 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:23:58,445 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 92.3 MB. Free memory was 62.1 MB in the beginning and 62.1 MB in the end (delta: 27.5 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 288.60 ms. Allocated memory is still 92.3 MB. Free memory was 58.4 MB in the beginning and 68.8 MB in the end (delta: -10.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 56.58 ms. Allocated memory is still 92.3 MB. Free memory was 68.8 MB in the beginning and 67.1 MB in the end (delta: 1.7 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 62.64 ms. Allocated memory is still 92.3 MB. Free memory was 67.1 MB in the beginning and 65.5 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 854.19 ms. Allocated memory was 92.3 MB in the beginning and 111.1 MB in the end (delta: 18.9 MB). Free memory was 65.5 MB in the beginning and 82.0 MB in the end (delta: -16.5 MB). Peak memory consumption was 35.9 MB. Max. memory is 16.1 GB. * TraceAbstraction took 493.85 ms. Allocated memory is still 111.1 MB. Free memory was 82.0 MB in the beginning and 58.5 MB in the end (delta: 23.5 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.1 GB. * Witness Printer took 5.09 ms. Allocated memory is still 111.1 MB. Free memory is still 58.5 MB. There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 87]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of someBinaryDOUBLEComparisonOperation at line 86, overapproximation of someUnaryDOUBLEoperation at line 82. Possible FailurePath: [L81] double x = 0.0; [L82] double y = -0.0; [L26] __uint32_t msw, lsw; [L29] ieee_double_shape_type ew_u; [L30] ew_u.value = (x) [L31] EXPR ew_u.parts.msw [L31] (msw) = ew_u.parts.msw [L32] EXPR ew_u.parts.lsw [L32] (lsw) = ew_u.parts.lsw [L35-L36] COND FALSE !((msw == 0x00000000 && lsw == 0x00000000) || (msw == 0x80000000 && lsw == 0x00000000)) [L38-L39] COND FALSE !((msw >= 0x00100000 && msw <= 0x7fefffff) || (msw >= 0x80100000 && msw <= 0xffefffff)) [L41-L42] COND FALSE !(( msw <= 0x000fffff) || (msw >= 0x80000000 && msw <= 0x800fffff)) [L45-L46] COND FALSE !((msw == 0x7ff00000 && lsw == 0x00000000) || (msw == 0xfff00000 && lsw == 0x00000000)) [L49] return 0; [L54] COND TRUE __fpclassify_double(x) == 0 [L55] return y; [L83] double res = fmax_double(x, y); [L86] EXPR res == 0.0 && __signbit_double(res) == 0 [L86] COND TRUE !(res == 0.0 && __signbit_double(res) == 0) [L87] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 18 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.4s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 19 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, 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=18occurred in iteration=0, 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, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 17 NumberOfCodeBlocks, 17 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 7 ConstructedInterpolants, 0 QuantifiedInterpolants, 49 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 Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.0-7b2dab5 [2021-10-11 02:24:01,013 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-11 02:24:01,016 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-11 02:24:01,066 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-11 02:24:01,067 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-11 02:24:01,072 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-11 02:24:01,076 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-11 02:24:01,081 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-11 02:24:01,083 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-11 02:24:01,084 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-11 02:24:01,086 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-11 02:24:01,087 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-11 02:24:01,088 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-11 02:24:01,090 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-11 02:24:01,096 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-11 02:24:01,098 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-11 02:24:01,099 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-11 02:24:01,105 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-11 02:24:01,110 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-11 02:24:01,113 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-11 02:24:01,119 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-11 02:24:01,121 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-11 02:24:01,122 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-11 02:24:01,125 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-11 02:24:01,133 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-11 02:24:01,134 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-11 02:24:01,137 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-11 02:24:01,138 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-11 02:24:01,139 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-11 02:24:01,140 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-11 02:24:01,141 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-11 02:24:01,142 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-11 02:24:01,143 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-11 02:24:01,145 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-11 02:24:01,147 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-11 02:24:01,147 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-11 02:24:01,148 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-11 02:24:01,148 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-11 02:24:01,149 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-11 02:24:01,150 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-11 02:24:01,152 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-11 02:24:01,153 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc411a8b-8305-42c9-9ceb-d6f51c654a58/bin/utaipan-WLngWcDbfI/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-10-11 02:24:01,204 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-11 02:24:01,204 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-11 02:24:01,205 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-11 02:24:01,206 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-11 02:24:01,206 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-11 02:24:01,206 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-11 02:24:01,206 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-11 02:24:01,207 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-11 02:24:01,207 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-11 02:24:01,208 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-11 02:24:01,208 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-11 02:24:01,208 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-11 02:24:01,209 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-11 02:24:01,209 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-11 02:24:01,209 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-11 02:24:01,210 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-11 02:24:01,210 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-11 02:24:01,210 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-11 02:24:01,210 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-11 02:24:01,211 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-11 02:24:01,211 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-11 02:24:01,211 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-11 02:24:01,211 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-11 02:24:01,212 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-11 02:24:01,212 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-11 02:24:01,212 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-11 02:24:01,213 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-11 02:24:01,213 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-11 02:24:01,213 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-11 02:24:01,214 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-11 02:24:01,214 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-10-11 02:24:01,214 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-11 02:24:01,214 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-11 02:24:01,215 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-11 02:24:01,215 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-11 02:24:01,215 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_cc411a8b-8305-42c9-9ceb-d6f51c654a58/bin/utaipan-WLngWcDbfI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc411a8b-8305-42c9-9ceb-d6f51c654a58/bin/utaipan-WLngWcDbfI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a6231fe9945ed231781bef28be0893007c672b08 [2021-10-11 02:24:01,636 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-11 02:24:01,660 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-11 02:24:01,663 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-11 02:24:01,664 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-11 02:24:01,665 INFO L275 PluginConnector]: CDTParser initialized [2021-10-11 02:24:01,667 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc411a8b-8305-42c9-9ceb-d6f51c654a58/bin/utaipan-WLngWcDbfI/../../sv-benchmarks/c/float-newlib/double_req_bl_1252b.c [2021-10-11 02:24:01,743 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc411a8b-8305-42c9-9ceb-d6f51c654a58/bin/utaipan-WLngWcDbfI/data/777c2228f/5cc87281e2bb40478ddc57c9ff9255c1/FLAGc05a9e648 [2021-10-11 02:24:02,242 INFO L306 CDTParser]: Found 1 translation units. [2021-10-11 02:24:02,246 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc411a8b-8305-42c9-9ceb-d6f51c654a58/sv-benchmarks/c/float-newlib/double_req_bl_1252b.c [2021-10-11 02:24:02,256 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc411a8b-8305-42c9-9ceb-d6f51c654a58/bin/utaipan-WLngWcDbfI/data/777c2228f/5cc87281e2bb40478ddc57c9ff9255c1/FLAGc05a9e648 [2021-10-11 02:24:02,577 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc411a8b-8305-42c9-9ceb-d6f51c654a58/bin/utaipan-WLngWcDbfI/data/777c2228f/5cc87281e2bb40478ddc57c9ff9255c1 [2021-10-11 02:24:02,579 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-11 02:24:02,581 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-11 02:24:02,583 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-11 02:24:02,583 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-11 02:24:02,587 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-11 02:24:02,587 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:24:02" (1/1) ... [2021-10-11 02:24:02,590 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6191d3c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:24:02, skipping insertion in model container [2021-10-11 02:24:02,590 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:24:02" (1/1) ... [2021-10-11 02:24:02,598 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-11 02:24:02,617 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-11 02:24:02,798 WARN L226 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_cc411a8b-8305-42c9-9ceb-d6f51c654a58/sv-benchmarks/c/float-newlib/double_req_bl_1252b.c[2154,2167] [2021-10-11 02:24:02,801 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:24:02,816 INFO L203 MainTranslator]: Completed pre-run [2021-10-11 02:24:02,844 WARN L226 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_cc411a8b-8305-42c9-9ceb-d6f51c654a58/sv-benchmarks/c/float-newlib/double_req_bl_1252b.c[2154,2167] [2021-10-11 02:24:02,845 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:24:02,883 INFO L208 MainTranslator]: Completed translation [2021-10-11 02:24:02,885 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:24:02 WrapperNode [2021-10-11 02:24:02,885 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-11 02:24:02,887 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-11 02:24:02,887 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-11 02:24:02,887 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-11 02:24:02,896 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:24:02" (1/1) ... [2021-10-11 02:24:02,924 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:24:02" (1/1) ... [2021-10-11 02:24:02,962 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-11 02:24:02,967 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-11 02:24:02,968 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-11 02:24:02,968 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-11 02:24:02,990 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:24:02" (1/1) ... [2021-10-11 02:24:02,991 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:24:02" (1/1) ... [2021-10-11 02:24:03,015 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:24:02" (1/1) ... [2021-10-11 02:24:03,016 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:24:02" (1/1) ... [2021-10-11 02:24:03,034 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:24:02" (1/1) ... [2021-10-11 02:24:03,044 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:24:02" (1/1) ... [2021-10-11 02:24:03,050 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:24:02" (1/1) ... [2021-10-11 02:24:03,057 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-11 02:24:03,062 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-11 02:24:03,063 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-11 02:24:03,063 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-11 02:24:03,064 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:24:02" (1/1) ... No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc411a8b-8305-42c9-9ceb-d6f51c654a58/bin/utaipan-WLngWcDbfI/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-11 02:24:03,157 INFO L130 BoogieDeclarations]: Found specification of procedure write~intFLOATTYPE8 [2021-10-11 02:24:03,158 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-11 02:24:03,158 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-11 02:24:03,158 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-10-11 02:24:03,159 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-11 02:24:03,159 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-11 02:24:03,159 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-11 02:24:03,775 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-11 02:24:03,775 INFO L299 CfgBuilder]: Removed 18 assume(true) statements. [2021-10-11 02:24:03,777 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:24:03 BoogieIcfgContainer [2021-10-11 02:24:03,777 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-11 02:24:03,779 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-11 02:24:03,779 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-11 02:24:03,782 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-11 02:24:03,783 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 02:24:02" (1/3) ... [2021-10-11 02:24:03,796 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48e7ed01 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:24:03, skipping insertion in model container [2021-10-11 02:24:03,796 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:24:02" (2/3) ... [2021-10-11 02:24:03,796 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48e7ed01 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:24:03, skipping insertion in model container [2021-10-11 02:24:03,797 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:24:03" (3/3) ... [2021-10-11 02:24:03,798 INFO L111 eAbstractionObserver]: Analyzing ICFG double_req_bl_1252b.c [2021-10-11 02:24:03,815 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-11 02:24:03,819 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-10-11 02:24:03,832 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-11 02:24:03,875 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-10-11 02:24:03,875 INFO L378 AbstractCegarLoop]: Hoare is true [2021-10-11 02:24:03,875 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-10-11 02:24:03,875 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-10-11 02:24:03,875 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-10-11 02:24:03,876 INFO L382 AbstractCegarLoop]: Difference is false [2021-10-11 02:24:03,876 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-10-11 02:24:03,876 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-10-11 02:24:03,893 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2021-10-11 02:24:03,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-11 02:24:03,899 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:24:03,900 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:24:03,900 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:24:03,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:24:03,907 INFO L82 PathProgramCache]: Analyzing trace with hash -958075201, now seen corresponding path program 1 times [2021-10-11 02:24:03,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-11 02:24:03,922 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [206834294] [2021-10-11 02:24:03,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc411a8b-8305-42c9-9ceb-d6f51c654a58/bin/utaipan-WLngWcDbfI/mathsat Starting monitored process 2 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with mathsat -unsat_core_generation=3 [2021-10-11 02:24:04,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:24:04,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 1 conjunts are in the unsatisfiable core [2021-10-11 02:24:04,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:24:04,173 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:24:04,174 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-10-11 02:24:04,175 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [206834294] [2021-10-11 02:24:04,176 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:24:04,176 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-11 02:24:04,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146221276] [2021-10-11 02:24:04,194 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-10-11 02:24:04,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-11 02:24:04,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-11 02:24:04,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-11 02:24:04,215 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 2 states. [2021-10-11 02:24:04,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:24:04,244 INFO L93 Difference]: Finished difference Result 62 states and 98 transitions. [2021-10-11 02:24:04,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-11 02:24:04,246 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2021-10-11 02:24:04,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:24:04,265 INFO L225 Difference]: With dead ends: 62 [2021-10-11 02:24:04,265 INFO L226 Difference]: Without dead ends: 29 [2021-10-11 02:24:04,268 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-11 02:24:04,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-10-11 02:24:04,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-10-11 02:24:04,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2021-10-11 02:24:04,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 40 transitions. [2021-10-11 02:24:04,317 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 40 transitions. Word has length 10 [2021-10-11 02:24:04,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:24:04,317 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 40 transitions. [2021-10-11 02:24:04,318 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2021-10-11 02:24:04,318 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 40 transitions. [2021-10-11 02:24:04,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-11 02:24:04,319 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:24:04,319 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:24:04,533 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2021-10-11 02:24:04,533 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:24:04,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:24:04,534 INFO L82 PathProgramCache]: Analyzing trace with hash 1001584898, now seen corresponding path program 1 times [2021-10-11 02:24:04,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-11 02:24:04,535 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1732457391] [2021-10-11 02:24:04,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc411a8b-8305-42c9-9ceb-d6f51c654a58/bin/utaipan-WLngWcDbfI/mathsat Starting monitored process 3 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with mathsat -unsat_core_generation=3 [2021-10-11 02:24:04,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:24:04,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-11 02:24:04,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:24:04,723 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:24:04,723 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-10-11 02:24:04,724 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1732457391] [2021-10-11 02:24:04,724 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:24:04,724 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-11 02:24:04,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421376537] [2021-10-11 02:24:04,726 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-10-11 02:24:04,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-11 02:24:04,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-11 02:24:04,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:24:04,727 INFO L87 Difference]: Start difference. First operand 29 states and 40 transitions. Second operand 4 states. [2021-10-11 02:24:04,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:24:04,954 INFO L93 Difference]: Finished difference Result 53 states and 67 transitions. [2021-10-11 02:24:04,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-11 02:24:04,955 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2021-10-11 02:24:04,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:24:04,956 INFO L225 Difference]: With dead ends: 53 [2021-10-11 02:24:04,956 INFO L226 Difference]: Without dead ends: 44 [2021-10-11 02:24:04,957 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-11 02:24:04,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-10-11 02:24:04,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 31. [2021-10-11 02:24:04,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-10-11 02:24:04,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2021-10-11 02:24:04,964 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 11 [2021-10-11 02:24:04,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:24:04,964 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2021-10-11 02:24:04,964 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-10-11 02:24:04,964 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2021-10-11 02:24:04,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-11 02:24:04,965 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:24:04,965 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:24:05,183 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2021-10-11 02:24:05,184 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:24:05,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:24:05,184 INFO L82 PathProgramCache]: Analyzing trace with hash 502201410, now seen corresponding path program 1 times [2021-10-11 02:24:05,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-11 02:24:05,185 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [579136037] [2021-10-11 02:24:05,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc411a8b-8305-42c9-9ceb-d6f51c654a58/bin/utaipan-WLngWcDbfI/mathsat Starting monitored process 4 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with mathsat -unsat_core_generation=3 [2021-10-11 02:24:05,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:24:05,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-11 02:24:05,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:24:05,385 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:24:05,386 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-10-11 02:24:05,386 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [579136037] [2021-10-11 02:24:05,386 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:24:05,386 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-11 02:24:05,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056516441] [2021-10-11 02:24:05,387 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-10-11 02:24:05,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-11 02:24:05,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-11 02:24:05,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:24:05,388 INFO L87 Difference]: Start difference. First operand 31 states and 42 transitions. Second operand 4 states. [2021-10-11 02:24:05,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:24:05,512 INFO L93 Difference]: Finished difference Result 61 states and 79 transitions. [2021-10-11 02:24:05,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-11 02:24:05,513 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2021-10-11 02:24:05,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:24:05,514 INFO L225 Difference]: With dead ends: 61 [2021-10-11 02:24:05,515 INFO L226 Difference]: Without dead ends: 39 [2021-10-11 02:24:05,515 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-11 02:24:05,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-10-11 02:24:05,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 30. [2021-10-11 02:24:05,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2021-10-11 02:24:05,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 38 transitions. [2021-10-11 02:24:05,522 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 38 transitions. Word has length 12 [2021-10-11 02:24:05,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:24:05,523 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 38 transitions. [2021-10-11 02:24:05,523 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-10-11 02:24:05,523 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 38 transitions. [2021-10-11 02:24:05,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-11 02:24:05,524 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:24:05,524 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:24:05,740 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3 [2021-10-11 02:24:05,740 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:24:05,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:24:05,741 INFO L82 PathProgramCache]: Analyzing trace with hash -1951233721, now seen corresponding path program 1 times [2021-10-11 02:24:05,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-11 02:24:05,742 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [587580375] [2021-10-11 02:24:05,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc411a8b-8305-42c9-9ceb-d6f51c654a58/bin/utaipan-WLngWcDbfI/mathsat Starting monitored process 5 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with mathsat -unsat_core_generation=3 [2021-10-11 02:24:05,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:24:05,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-11 02:24:05,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:24:05,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:24:05,847 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-10-11 02:24:05,847 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [587580375] [2021-10-11 02:24:05,847 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:24:05,847 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-11 02:24:05,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882614374] [2021-10-11 02:24:05,848 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-10-11 02:24:05,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-11 02:24:05,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-11 02:24:05,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:24:05,849 INFO L87 Difference]: Start difference. First operand 30 states and 38 transitions. Second operand 4 states. [2021-10-11 02:24:05,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:24:05,902 INFO L93 Difference]: Finished difference Result 52 states and 62 transitions. [2021-10-11 02:24:05,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-11 02:24:05,902 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2021-10-11 02:24:05,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:24:05,903 INFO L225 Difference]: With dead ends: 52 [2021-10-11 02:24:05,904 INFO L226 Difference]: Without dead ends: 43 [2021-10-11 02:24:05,904 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-11 02:24:05,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-10-11 02:24:05,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 28. [2021-10-11 02:24:05,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2021-10-11 02:24:05,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 35 transitions. [2021-10-11 02:24:05,910 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 35 transitions. Word has length 13 [2021-10-11 02:24:05,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:24:05,911 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 35 transitions. [2021-10-11 02:24:05,911 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-10-11 02:24:05,911 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 35 transitions. [2021-10-11 02:24:05,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-11 02:24:05,912 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:24:05,912 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:24:06,137 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 mathsat -unsat_core_generation=3 [2021-10-11 02:24:06,137 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:24:06,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:24:06,138 INFO L82 PathProgramCache]: Analyzing trace with hash 1012446717, now seen corresponding path program 1 times [2021-10-11 02:24:06,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-11 02:24:06,138 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1160285469] [2021-10-11 02:24:06,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc411a8b-8305-42c9-9ceb-d6f51c654a58/bin/utaipan-WLngWcDbfI/mathsat Starting monitored process 6 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with mathsat -unsat_core_generation=3 [2021-10-11 02:24:06,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:24:06,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-11 02:24:06,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:24:06,276 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:24:06,276 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-10-11 02:24:06,277 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1160285469] [2021-10-11 02:24:06,277 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:24:06,277 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-11 02:24:06,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631571017] [2021-10-11 02:24:06,278 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-10-11 02:24:06,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-11 02:24:06,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-11 02:24:06,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:24:06,280 INFO L87 Difference]: Start difference. First operand 28 states and 35 transitions. Second operand 4 states. [2021-10-11 02:24:06,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:24:06,358 INFO L93 Difference]: Finished difference Result 52 states and 61 transitions. [2021-10-11 02:24:06,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-11 02:24:06,359 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2021-10-11 02:24:06,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:24:06,360 INFO L225 Difference]: With dead ends: 52 [2021-10-11 02:24:06,360 INFO L226 Difference]: Without dead ends: 43 [2021-10-11 02:24:06,361 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-11 02:24:06,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-10-11 02:24:06,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 30. [2021-10-11 02:24:06,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2021-10-11 02:24:06,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2021-10-11 02:24:06,366 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 16 [2021-10-11 02:24:06,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:24:06,367 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2021-10-11 02:24:06,367 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-10-11 02:24:06,367 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2021-10-11 02:24:06,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-11 02:24:06,368 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:24:06,368 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:24:06,575 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 mathsat -unsat_core_generation=3 [2021-10-11 02:24:06,575 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:24:06,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:24:06,576 INFO L82 PathProgramCache]: Analyzing trace with hash 874935118, now seen corresponding path program 1 times [2021-10-11 02:24:06,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-11 02:24:06,577 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1566750723] [2021-10-11 02:24:06,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc411a8b-8305-42c9-9ceb-d6f51c654a58/bin/utaipan-WLngWcDbfI/mathsat Starting monitored process 7 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with mathsat -unsat_core_generation=3 [2021-10-11 02:24:06,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:24:06,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-11 02:24:06,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:24:06,749 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:24:06,750 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-10-11 02:24:06,750 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1566750723] [2021-10-11 02:24:06,750 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:24:06,750 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-11 02:24:06,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076279778] [2021-10-11 02:24:06,751 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-10-11 02:24:06,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-11 02:24:06,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-11 02:24:06,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-11 02:24:06,753 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 5 states. [2021-10-11 02:24:06,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:24:06,858 INFO L93 Difference]: Finished difference Result 43 states and 52 transitions. [2021-10-11 02:24:06,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-11 02:24:06,860 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2021-10-11 02:24:06,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:24:06,860 INFO L225 Difference]: With dead ends: 43 [2021-10-11 02:24:06,860 INFO L226 Difference]: Without dead ends: 29 [2021-10-11 02:24:06,861 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-10-11 02:24:06,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-10-11 02:24:06,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-10-11 02:24:06,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2021-10-11 02:24:06,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2021-10-11 02:24:06,873 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 17 [2021-10-11 02:24:06,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:24:06,874 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2021-10-11 02:24:06,874 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-10-11 02:24:06,874 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2021-10-11 02:24:06,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-11 02:24:06,875 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:24:06,876 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:24:07,091 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 mathsat -unsat_core_generation=3 [2021-10-11 02:24:07,091 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:24:07,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:24:07,092 INFO L82 PathProgramCache]: Analyzing trace with hash -414082333, now seen corresponding path program 1 times [2021-10-11 02:24:07,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-11 02:24:07,092 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1659629337] [2021-10-11 02:24:07,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc411a8b-8305-42c9-9ceb-d6f51c654a58/bin/utaipan-WLngWcDbfI/mathsat Starting monitored process 8 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with mathsat -unsat_core_generation=3 [2021-10-11 02:24:07,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:24:07,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-11 02:24:07,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:24:07,286 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:24:07,286 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-10-11 02:24:07,287 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1659629337] [2021-10-11 02:24:07,287 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:24:07,287 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-11 02:24:07,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863802650] [2021-10-11 02:24:07,288 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:24:07,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-11 02:24:07,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:24:07,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:24:07,289 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 3 states. [2021-10-11 02:24:07,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:24:07,313 INFO L93 Difference]: Finished difference Result 39 states and 43 transitions. [2021-10-11 02:24:07,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:24:07,314 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2021-10-11 02:24:07,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:24:07,314 INFO L225 Difference]: With dead ends: 39 [2021-10-11 02:24:07,315 INFO L226 Difference]: Without dead ends: 29 [2021-10-11 02:24:07,315 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:24:07,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-10-11 02:24:07,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-10-11 02:24:07,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2021-10-11 02:24:07,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2021-10-11 02:24:07,321 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 18 [2021-10-11 02:24:07,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:24:07,321 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2021-10-11 02:24:07,321 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:24:07,327 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2021-10-11 02:24:07,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-11 02:24:07,328 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:24:07,328 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:24:07,545 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 mathsat -unsat_core_generation=3 [2021-10-11 02:24:07,545 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:24:07,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:24:07,546 INFO L82 PathProgramCache]: Analyzing trace with hash -356824031, now seen corresponding path program 1 times [2021-10-11 02:24:07,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-11 02:24:07,546 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [30103721] [2021-10-11 02:24:07,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc411a8b-8305-42c9-9ceb-d6f51c654a58/bin/utaipan-WLngWcDbfI/mathsat Starting monitored process 9 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with mathsat -unsat_core_generation=3 [2021-10-11 02:24:07,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:24:07,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-11 02:24:07,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:24:07,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:24:07,709 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-10-11 02:24:07,709 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [30103721] [2021-10-11 02:24:07,709 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:24:07,709 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-11 02:24:07,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512958238] [2021-10-11 02:24:07,710 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-10-11 02:24:07,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-11 02:24:07,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-11 02:24:07,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-11 02:24:07,711 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand 6 states. [2021-10-11 02:24:07,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:24:07,833 INFO L93 Difference]: Finished difference Result 41 states and 43 transitions. [2021-10-11 02:24:07,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-11 02:24:07,834 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2021-10-11 02:24:07,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:24:07,835 INFO L225 Difference]: With dead ends: 41 [2021-10-11 02:24:07,835 INFO L226 Difference]: Without dead ends: 38 [2021-10-11 02:24:07,835 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-10-11 02:24:07,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-10-11 02:24:07,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 31. [2021-10-11 02:24:07,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-10-11 02:24:07,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2021-10-11 02:24:07,839 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 18 [2021-10-11 02:24:07,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:24:07,839 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2021-10-11 02:24:07,839 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-10-11 02:24:07,839 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2021-10-11 02:24:07,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-11 02:24:07,840 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:24:07,840 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:24:08,053 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 mathsat -unsat_core_generation=3 [2021-10-11 02:24:08,053 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:24:08,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:24:08,055 INFO L82 PathProgramCache]: Analyzing trace with hash 1049593954, now seen corresponding path program 1 times [2021-10-11 02:24:08,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-11 02:24:08,055 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [258810559] [2021-10-11 02:24:08,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc411a8b-8305-42c9-9ceb-d6f51c654a58/bin/utaipan-WLngWcDbfI/mathsat Starting monitored process 10 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with mathsat -unsat_core_generation=3 [2021-10-11 02:24:08,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:24:08,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-11 02:24:08,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:24:08,168 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:24:08,168 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-10-11 02:24:08,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [258810559] [2021-10-11 02:24:08,169 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:24:08,169 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-11 02:24:08,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956964848] [2021-10-11 02:24:08,170 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-10-11 02:24:08,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-11 02:24:08,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-11 02:24:08,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:24:08,171 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand 4 states. [2021-10-11 02:24:08,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:24:08,224 INFO L93 Difference]: Finished difference Result 51 states and 52 transitions. [2021-10-11 02:24:08,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-11 02:24:08,227 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2021-10-11 02:24:08,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:24:08,228 INFO L225 Difference]: With dead ends: 51 [2021-10-11 02:24:08,228 INFO L226 Difference]: Without dead ends: 42 [2021-10-11 02:24:08,229 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-11 02:24:08,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-10-11 02:24:08,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 27. [2021-10-11 02:24:08,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2021-10-11 02:24:08,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2021-10-11 02:24:08,235 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 18 [2021-10-11 02:24:08,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:24:08,235 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2021-10-11 02:24:08,235 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-10-11 02:24:08,236 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2021-10-11 02:24:08,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-11 02:24:08,236 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:24:08,237 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:24:08,443 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 mathsat -unsat_core_generation=3 [2021-10-11 02:24:08,443 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:24:08,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:24:08,444 INFO L82 PathProgramCache]: Analyzing trace with hash -1524231306, now seen corresponding path program 1 times [2021-10-11 02:24:08,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-11 02:24:08,447 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [222954500] [2021-10-11 02:24:08,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc411a8b-8305-42c9-9ceb-d6f51c654a58/bin/utaipan-WLngWcDbfI/mathsat Starting monitored process 11 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with mathsat -unsat_core_generation=3 [2021-10-11 02:24:08,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-11 02:24:08,598 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-11 02:24:08,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-11 02:24:08,703 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-11 02:24:08,769 INFO L173 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2021-10-11 02:24:08,769 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-10-11 02:24:08,969 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 mathsat -unsat_core_generation=3 [2021-10-11 02:24:09,013 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.10 02:24:09 BoogieIcfgContainer [2021-10-11 02:24:09,014 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-11 02:24:09,014 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-11 02:24:09,015 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-11 02:24:09,015 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-11 02:24:09,015 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:24:03" (3/4) ... [2021-10-11 02:24:09,017 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-11 02:24:09,109 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc411a8b-8305-42c9-9ceb-d6f51c654a58/bin/utaipan-WLngWcDbfI/witness.graphml [2021-10-11 02:24:09,109 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-11 02:24:09,111 INFO L168 Benchmark]: Toolchain (without parser) took 6528.74 ms. Allocated memory was 81.8 MB in the beginning and 100.7 MB in the end (delta: 18.9 MB). Free memory was 46.8 MB in the beginning and 60.6 MB in the end (delta: -13.8 MB). Peak memory consumption was 6.4 MB. Max. memory is 16.1 GB. [2021-10-11 02:24:09,111 INFO L168 Benchmark]: CDTParser took 0.37 ms. Allocated memory is still 81.8 MB. Free memory was 63.2 MB in the beginning and 63.2 MB in the end (delta: 72.6 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:24:09,112 INFO L168 Benchmark]: CACSL2BoogieTranslator took 302.93 ms. Allocated memory is still 81.8 MB. Free memory was 46.6 MB in the beginning and 59.5 MB in the end (delta: -13.0 MB). Peak memory consumption was 7.2 MB. Max. memory is 16.1 GB. [2021-10-11 02:24:09,112 INFO L168 Benchmark]: Boogie Procedure Inliner took 79.26 ms. Allocated memory is still 81.8 MB. Free memory was 59.5 MB in the beginning and 65.7 MB in the end (delta: -6.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-11 02:24:09,113 INFO L168 Benchmark]: Boogie Preprocessor took 93.75 ms. Allocated memory is still 81.8 MB. Free memory was 65.7 MB in the beginning and 64.1 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:24:09,113 INFO L168 Benchmark]: RCFGBuilder took 715.62 ms. Allocated memory is still 81.8 MB. Free memory was 64.1 MB in the beginning and 43.6 MB in the end (delta: 20.5 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. [2021-10-11 02:24:09,114 INFO L168 Benchmark]: TraceAbstraction took 5235.15 ms. Allocated memory was 81.8 MB in the beginning and 100.7 MB in the end (delta: 18.9 MB). Free memory was 43.1 MB in the beginning and 62.7 MB in the end (delta: -19.6 MB). Peak memory consumption was 529.8 kB. Max. memory is 16.1 GB. [2021-10-11 02:24:09,114 INFO L168 Benchmark]: Witness Printer took 94.56 ms. Allocated memory is still 100.7 MB. Free memory was 62.7 MB in the beginning and 60.6 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-11 02:24:09,117 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.37 ms. Allocated memory is still 81.8 MB. Free memory was 63.2 MB in the beginning and 63.2 MB in the end (delta: 72.6 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 302.93 ms. Allocated memory is still 81.8 MB. Free memory was 46.6 MB in the beginning and 59.5 MB in the end (delta: -13.0 MB). Peak memory consumption was 7.2 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 79.26 ms. Allocated memory is still 81.8 MB. Free memory was 59.5 MB in the beginning and 65.7 MB in the end (delta: -6.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 93.75 ms. Allocated memory is still 81.8 MB. Free memory was 65.7 MB in the beginning and 64.1 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 715.62 ms. Allocated memory is still 81.8 MB. Free memory was 64.1 MB in the beginning and 43.6 MB in the end (delta: 20.5 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. * TraceAbstraction took 5235.15 ms. Allocated memory was 81.8 MB in the beginning and 100.7 MB in the end (delta: 18.9 MB). Free memory was 43.1 MB in the beginning and 62.7 MB in the end (delta: -19.6 MB). Peak memory consumption was 529.8 kB. Max. memory is 16.1 GB. * Witness Printer took 94.56 ms. Allocated memory is still 100.7 MB. Free memory was 62.7 MB in the beginning and 60.6 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 87]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L81] double x = 0.0; [L82] double y = -0.0; [L26] __uint32_t msw, lsw; [L29] ieee_double_shape_type ew_u; [L30] ew_u.value = (x) [L31] EXPR ew_u.parts.msw [L31] (msw) = ew_u.parts.msw [L32] EXPR ew_u.parts.lsw [L32] (lsw) = ew_u.parts.lsw [L35-L36] COND TRUE (msw == 0x00000000 && lsw == 0x00000000) || (msw == 0x80000000 && lsw == 0x00000000) [L37] return 2; [L54] COND FALSE !(__fpclassify_double(x) == 0) [L26] __uint32_t msw, lsw; [L29] ieee_double_shape_type ew_u; [L30] ew_u.value = (x) [L31] EXPR ew_u.parts.msw [L31] (msw) = ew_u.parts.msw [L32] EXPR ew_u.parts.lsw [L32] (lsw) = ew_u.parts.lsw [L35-L36] COND TRUE (msw == 0x00000000 && lsw == 0x00000000) || (msw == 0x80000000 && lsw == 0x00000000) [L37] return 2; [L56] COND FALSE !(__fpclassify_double(y) == 0) [L59] EXPR x > y ? x : y [L59] return x > y ? x : y; [L83] double res = fmax_double(x, y); [L86] EXPR res == 0.0 && __signbit_double(res) == 0 [L63] __uint32_t msw; [L66] ieee_double_shape_type gh_u; [L67] gh_u.value = (x) [L68] EXPR gh_u.parts.msw [L68] (msw) = gh_u.parts.msw [L71] return (msw & 0x80000000) != 0; [L86] EXPR res == 0.0 && __signbit_double(res) == 0 [L86] COND TRUE !(res == 0.0 && __signbit_double(res) == 0) [L87] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 32 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 5.0s, OverallIterations: 10, TraceHistogramMax: 1, AutomataDifference: 0.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 326 SDtfs, 209 SDslu, 383 SDs, 0 SdLazy, 132 SolverSat, 10 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 135 GetRequests, 105 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=32occurred in iteration=0, 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, 9 MinimizatonAttempts, 72 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 155 NumberOfCodeBlocks, 155 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 124 ConstructedInterpolants, 6 QuantifiedInterpolants, 5474 SizeOfPredicates, 29 NumberOfNonLiveVariables, 537 ConjunctsInSsa, 46 ConjunctsInUnsatCore, 9 InterpolantComputations, 9 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 proved your program to be incorrect! Received shutdown request...