./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/float-newlib/double_req_bl_1232b.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_3a5dea3d-3788-48a8-b60b-f38679344101/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_3a5dea3d-3788-48a8-b60b-f38679344101/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_3a5dea3d-3788-48a8-b60b-f38679344101/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_3a5dea3d-3788-48a8-b60b-f38679344101/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-newlib/double_req_bl_1232b.c -s /tmp/vcloud-vcloud-master/worker/run_dir_3a5dea3d-3788-48a8-b60b-f38679344101/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_3a5dea3d-3788-48a8-b60b-f38679344101/bin/utaipan --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 c8aa0f6d603c21abbc49650bbaaea4f693aff7f0 ........................................................................................................................................................................................................................................................................................................... Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_3a5dea3d-3788-48a8-b60b-f38679344101/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_3a5dea3d-3788-48a8-b60b-f38679344101/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_3a5dea3d-3788-48a8-b60b-f38679344101/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_3a5dea3d-3788-48a8-b60b-f38679344101/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-newlib/double_req_bl_1232b.c -s /tmp/vcloud-vcloud-master/worker/run_dir_3a5dea3d-3788-48a8-b60b-f38679344101/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_3a5dea3d-3788-48a8-b60b-f38679344101/bin/utaipan --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 c8aa0f6d603c21abbc49650bbaaea4f693aff7f0 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 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 [2020-12-09 15:47:01,558 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 15:47:01,560 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 15:47:01,590 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 15:47:01,591 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 15:47:01,592 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 15:47:01,593 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 15:47:01,603 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 15:47:01,604 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 15:47:01,606 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 15:47:01,607 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 15:47:01,608 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 15:47:01,608 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 15:47:01,609 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 15:47:01,610 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 15:47:01,612 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 15:47:01,612 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 15:47:01,613 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 15:47:01,615 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 15:47:01,617 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 15:47:01,619 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 15:47:01,621 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 15:47:01,622 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 15:47:01,623 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 15:47:01,626 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 15:47:01,626 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 15:47:01,626 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 15:47:01,627 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 15:47:01,628 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 15:47:01,629 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 15:47:01,629 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 15:47:01,630 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 15:47:01,631 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 15:47:01,631 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 15:47:01,632 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 15:47:01,633 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 15:47:01,633 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 15:47:01,633 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 15:47:01,633 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 15:47:01,634 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 15:47:01,634 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 15:47:01,635 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_3a5dea3d-3788-48a8-b60b-f38679344101/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-12-09 15:47:01,651 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 15:47:01,651 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 15:47:01,651 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 15:47:01,651 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 15:47:01,652 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 15:47:01,652 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 15:47:01,652 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-12-09 15:47:01,652 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 15:47:01,652 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 15:47:01,652 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-12-09 15:47:01,652 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-12-09 15:47:01,652 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 15:47:01,652 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-12-09 15:47:01,653 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-12-09 15:47:01,653 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-12-09 15:47:01,653 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 15:47:01,653 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 15:47:01,653 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-09 15:47:01,653 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 15:47:01,654 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 15:47:01,654 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-09 15:47:01,654 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 15:47:01,654 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-09 15:47:01,654 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 15:47:01,654 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 15:47:01,654 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-09 15:47:01,654 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 15:47:01,654 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-09 15:47:01,654 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 15:47:01,655 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 15:47:01,655 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 15:47:01,655 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 15:47:01,655 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 15:47:01,655 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-09 15:47:01,655 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-12-09 15:47:01,655 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-09 15:47:01,655 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-09 15:47:01,655 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 15:47:01,656 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 15:47:01,656 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-vcloud-master/worker/run_dir_3a5dea3d-3788-48a8-b60b-f38679344101/bin/utaipan/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_3a5dea3d-3788-48a8-b60b-f38679344101/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c8aa0f6d603c21abbc49650bbaaea4f693aff7f0 [2020-12-09 15:47:01,814 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 15:47:01,829 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 15:47:01,831 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 15:47:01,832 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 15:47:01,832 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 15:47:01,833 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_3a5dea3d-3788-48a8-b60b-f38679344101/bin/utaipan/../../sv-benchmarks/c/float-newlib/double_req_bl_1232b.c [2020-12-09 15:47:01,876 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_3a5dea3d-3788-48a8-b60b-f38679344101/bin/utaipan/data/b654447c6/038e993c08cd4bc785d44894c14f53d1/FLAGeaba19e76 [2020-12-09 15:47:02,260 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 15:47:02,261 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_3a5dea3d-3788-48a8-b60b-f38679344101/sv-benchmarks/c/float-newlib/double_req_bl_1232b.c [2020-12-09 15:47:02,266 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_3a5dea3d-3788-48a8-b60b-f38679344101/bin/utaipan/data/b654447c6/038e993c08cd4bc785d44894c14f53d1/FLAGeaba19e76 [2020-12-09 15:47:02,276 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_3a5dea3d-3788-48a8-b60b-f38679344101/bin/utaipan/data/b654447c6/038e993c08cd4bc785d44894c14f53d1 [2020-12-09 15:47:02,278 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 15:47:02,280 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 15:47:02,281 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 15:47:02,281 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 15:47:02,284 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 15:47:02,285 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 03:47:02" (1/1) ... [2020-12-09 15:47:02,287 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1baef4e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 03:47:02, skipping insertion in model container [2020-12-09 15:47:02,287 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 03:47:02" (1/1) ... [2020-12-09 15:47:02,293 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 15:47:02,305 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 15:47:02,411 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_3a5dea3d-3788-48a8-b60b-f38679344101/sv-benchmarks/c/float-newlib/double_req_bl_1232b.c[1958,1971] [2020-12-09 15:47:02,414 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 15:47:02,420 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 15:47:02,438 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_3a5dea3d-3788-48a8-b60b-f38679344101/sv-benchmarks/c/float-newlib/double_req_bl_1232b.c[1958,1971] [2020-12-09 15:47:02,438 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 15:47:02,449 INFO L208 MainTranslator]: Completed translation [2020-12-09 15:47:02,450 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 03:47:02 WrapperNode [2020-12-09 15:47:02,450 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 15:47:02,451 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 15:47:02,451 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 15:47:02,451 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 15:47:02,456 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 03:47:02" (1/1) ... [2020-12-09 15:47:02,462 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 03:47:02" (1/1) ... [2020-12-09 15:47:02,479 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 15:47:02,480 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 15:47:02,480 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 15:47:02,480 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 15:47:02,486 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 03:47:02" (1/1) ... [2020-12-09 15:47:02,487 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 03:47:02" (1/1) ... [2020-12-09 15:47:02,489 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 03:47:02" (1/1) ... [2020-12-09 15:47:02,489 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 03:47:02" (1/1) ... [2020-12-09 15:47:02,494 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 03:47:02" (1/1) ... [2020-12-09 15:47:02,497 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 03:47:02" (1/1) ... [2020-12-09 15:47:02,499 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 03:47:02" (1/1) ... [2020-12-09 15:47:02,501 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 15:47:02,502 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 15:47:02,502 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 15:47:02,502 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 15:47:02,503 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 03:47:02" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3a5dea3d-3788-48a8-b60b-f38679344101/bin/utaipan/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 [2020-12-09 15:47:02,567 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-09 15:47:02,567 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 15:47:02,567 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-12-09 15:47:02,567 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 15:47:02,567 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 15:47:02,568 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-09 15:47:02,568 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-09 15:47:02,969 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 15:47:02,969 INFO L299 CfgBuilder]: Removed 18 assume(true) statements. [2020-12-09 15:47:02,971 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 03:47:02 BoogieIcfgContainer [2020-12-09 15:47:02,971 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 15:47:02,972 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 15:47:02,972 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 15:47:02,974 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 15:47:02,975 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 03:47:02" (1/3) ... [2020-12-09 15:47:02,975 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@682b78c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 03:47:02, skipping insertion in model container [2020-12-09 15:47:02,975 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 03:47:02" (2/3) ... [2020-12-09 15:47:02,976 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@682b78c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 03:47:02, skipping insertion in model container [2020-12-09 15:47:02,976 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 03:47:02" (3/3) ... [2020-12-09 15:47:02,977 INFO L111 eAbstractionObserver]: Analyzing ICFG double_req_bl_1232b.c [2020-12-09 15:47:02,986 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 15:47:02,989 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-09 15:47:02,996 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-09 15:47:03,011 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 15:47:03,011 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-09 15:47:03,011 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 15:47:03,011 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 15:47:03,012 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 15:47:03,012 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 15:47:03,012 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 15:47:03,012 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 15:47:03,020 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2020-12-09 15:47:03,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-09 15:47:03,023 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 15:47:03,023 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 15:47:03,024 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 15:47:03,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 15:47:03,027 INFO L82 PathProgramCache]: Analyzing trace with hash 1433219361, now seen corresponding path program 1 times [2020-12-09 15:47:03,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 15:47:03,034 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310681836] [2020-12-09 15:47:03,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 15:47:03,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 15:47:03,135 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 15:47:03,136 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310681836] [2020-12-09 15:47:03,136 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 15:47:03,136 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 15:47:03,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248765536] [2020-12-09 15:47:03,141 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-09 15:47:03,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 15:47:03,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-09 15:47:03,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-09 15:47:03,151 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 2 states. [2020-12-09 15:47:03,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 15:47:03,163 INFO L93 Difference]: Finished difference Result 35 states and 51 transitions. [2020-12-09 15:47:03,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-09 15:47:03,165 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 8 [2020-12-09 15:47:03,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 15:47:03,173 INFO L225 Difference]: With dead ends: 35 [2020-12-09 15:47:03,173 INFO L226 Difference]: Without dead ends: 16 [2020-12-09 15:47:03,175 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 [2020-12-09 15:47:03,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-12-09 15:47:03,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-12-09 15:47:03,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-12-09 15:47:03,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2020-12-09 15:47:03,200 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 8 [2020-12-09 15:47:03,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 15:47:03,201 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2020-12-09 15:47:03,201 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-09 15:47:03,201 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2020-12-09 15:47:03,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-09 15:47:03,201 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 15:47:03,201 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 15:47:03,201 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-09 15:47:03,201 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 15:47:03,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 15:47:03,202 INFO L82 PathProgramCache]: Analyzing trace with hash -2131701560, now seen corresponding path program 1 times [2020-12-09 15:47:03,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 15:47:03,202 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528193787] [2020-12-09 15:47:03,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 15:47:03,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 15:47:03,234 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 15:47:03,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 15:47:03,269 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 15:47:03,285 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2020-12-09 15:47:03,285 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-09 15:47:03,286 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-09 15:47:03,303 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 03:47:03 BoogieIcfgContainer [2020-12-09 15:47:03,304 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 15:47:03,304 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 15:47:03,304 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 15:47:03,304 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 15:47:03,305 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 03:47:02" (3/4) ... [2020-12-09 15:47:03,307 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-12-09 15:47:03,307 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 15:47:03,308 INFO L168 Benchmark]: Toolchain (without parser) took 1027.85 ms. Allocated memory is still 104.9 MB. Free memory was 76.4 MB in the beginning and 79.3 MB in the end (delta: -2.8 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 15:47:03,309 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 73.4 MB. Free memory was 40.4 MB in the beginning and 40.4 MB in the end (delta: 56.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 15:47:03,309 INFO L168 Benchmark]: CACSL2BoogieTranslator took 169.10 ms. Allocated memory is still 104.9 MB. Free memory was 76.2 MB in the beginning and 65.7 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-12-09 15:47:03,310 INFO L168 Benchmark]: Boogie Procedure Inliner took 28.66 ms. Allocated memory is still 104.9 MB. Free memory was 65.7 MB in the beginning and 63.8 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 15:47:03,310 INFO L168 Benchmark]: Boogie Preprocessor took 21.32 ms. Allocated memory is still 104.9 MB. Free memory was 63.8 MB in the beginning and 62.4 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 15:47:03,311 INFO L168 Benchmark]: RCFGBuilder took 469.22 ms. Allocated memory is still 104.9 MB. Free memory was 62.3 MB in the beginning and 62.7 MB in the end (delta: -376.0 kB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. [2020-12-09 15:47:03,311 INFO L168 Benchmark]: TraceAbstraction took 331.74 ms. Allocated memory is still 104.9 MB. Free memory was 62.3 MB in the beginning and 79.3 MB in the end (delta: -16.9 MB). Peak memory consumption was 27.2 MB. Max. memory is 16.1 GB. [2020-12-09 15:47:03,312 INFO L168 Benchmark]: Witness Printer took 2.80 ms. Allocated memory is still 104.9 MB. Free memory is still 79.3 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 15:47:03,314 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 73.4 MB. Free memory was 40.4 MB in the beginning and 40.4 MB in the end (delta: 56.1 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 169.10 ms. Allocated memory is still 104.9 MB. Free memory was 76.2 MB in the beginning and 65.7 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 28.66 ms. Allocated memory is still 104.9 MB. Free memory was 65.7 MB in the beginning and 63.8 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 21.32 ms. Allocated memory is still 104.9 MB. Free memory was 63.8 MB in the beginning and 62.4 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 469.22 ms. Allocated memory is still 104.9 MB. Free memory was 62.3 MB in the beginning and 62.7 MB in the end (delta: -376.0 kB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. * TraceAbstraction took 331.74 ms. Allocated memory is still 104.9 MB. Free memory was 62.3 MB in the beginning and 79.3 MB in the end (delta: -16.9 MB). Peak memory consumption was 27.2 MB. Max. memory is 16.1 GB. * Witness Printer took 2.80 ms. Allocated memory is still 104.9 MB. Free memory is still 79.3 MB. There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 82]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of someBinaryDOUBLEComparisonOperation at line 81, overapproximation of someUnaryDOUBLEoperation at line 76. Possible FailurePath: [L76] double x = -0.0; [L77] double y = 0.0; [L21] __uint32_t msw, lsw; [L24] ieee_double_shape_type ew_u; [L25] ew_u.value = (x) [L26] EXPR ew_u.parts.msw [L26] (msw) = ew_u.parts.msw [L27] EXPR ew_u.parts.lsw [L27] (lsw) = ew_u.parts.lsw [L30-L31] COND FALSE !((msw == 0x00000000 && lsw == 0x00000000) || (msw == 0x80000000 && lsw == 0x00000000)) [L33-L34] COND FALSE !((msw >= 0x00100000 && msw <= 0x7fefffff) || (msw >= 0x80100000 && msw <= 0xffefffff)) [L36-L37] COND FALSE !(( msw <= 0x000fffff) || (msw >= 0x80000000 && msw <= 0x800fffff)) [L40-L41] COND FALSE !((msw == 0x7ff00000 && lsw == 0x00000000) || (msw == 0xfff00000 && lsw == 0x00000000)) [L44] return 0; [L48] COND TRUE __fpclassify_double(x) == 0 [L49] return y; [L78] double res = fmin_double(x, y); [L81] EXPR res == -0.0 && __signbit_double(res) == 1 [L81] COND TRUE !(res == -0.0 && __signbit_double(res) == 1) [L82] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 18 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.2s, 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 [2020-12-09 15:47:04,818 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 15:47:04,820 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 15:47:04,845 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 15:47:04,845 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 15:47:04,846 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 15:47:04,848 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 15:47:04,850 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 15:47:04,851 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 15:47:04,852 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 15:47:04,853 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 15:47:04,854 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 15:47:04,854 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 15:47:04,855 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 15:47:04,856 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 15:47:04,857 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 15:47:04,858 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 15:47:04,859 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 15:47:04,861 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 15:47:04,862 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 15:47:04,864 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 15:47:04,865 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 15:47:04,866 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 15:47:04,867 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 15:47:04,870 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 15:47:04,870 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 15:47:04,870 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 15:47:04,871 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 15:47:04,872 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 15:47:04,873 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 15:47:04,873 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 15:47:04,874 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 15:47:04,874 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 15:47:04,875 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 15:47:04,876 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 15:47:04,876 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 15:47:04,877 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 15:47:04,877 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 15:47:04,877 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 15:47:04,878 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 15:47:04,878 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 15:47:04,879 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_3a5dea3d-3788-48a8-b60b-f38679344101/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2020-12-09 15:47:04,896 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 15:47:04,896 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 15:47:04,897 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 15:47:04,897 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 15:47:04,897 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 15:47:04,897 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 15:47:04,898 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 15:47:04,898 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 15:47:04,898 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 15:47:04,898 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 15:47:04,898 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 15:47:04,899 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 15:47:04,899 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 15:47:04,899 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-09 15:47:04,899 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 15:47:04,899 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-09 15:47:04,899 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 15:47:04,899 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2020-12-09 15:47:04,899 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2020-12-09 15:47:04,900 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 15:47:04,900 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-09 15:47:04,900 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 15:47:04,900 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-09 15:47:04,900 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 15:47:04,900 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-09 15:47:04,900 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 15:47:04,900 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 15:47:04,901 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 15:47:04,901 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 15:47:04,901 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-09 15:47:04,901 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2020-12-09 15:47:04,901 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2020-12-09 15:47:04,901 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-09 15:47:04,901 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 15:47:04,902 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 15:47:04,902 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-vcloud-master/worker/run_dir_3a5dea3d-3788-48a8-b60b-f38679344101/bin/utaipan/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_3a5dea3d-3788-48a8-b60b-f38679344101/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c8aa0f6d603c21abbc49650bbaaea4f693aff7f0 [2020-12-09 15:47:05,120 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 15:47:05,135 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 15:47:05,137 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 15:47:05,138 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 15:47:05,138 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 15:47:05,139 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_3a5dea3d-3788-48a8-b60b-f38679344101/bin/utaipan/../../sv-benchmarks/c/float-newlib/double_req_bl_1232b.c [2020-12-09 15:47:05,183 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_3a5dea3d-3788-48a8-b60b-f38679344101/bin/utaipan/data/64a2e2384/dbd0869555ab487cbea8680798860535/FLAG94eb0e3d1 [2020-12-09 15:47:05,570 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 15:47:05,570 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_3a5dea3d-3788-48a8-b60b-f38679344101/sv-benchmarks/c/float-newlib/double_req_bl_1232b.c [2020-12-09 15:47:05,576 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_3a5dea3d-3788-48a8-b60b-f38679344101/bin/utaipan/data/64a2e2384/dbd0869555ab487cbea8680798860535/FLAG94eb0e3d1 [2020-12-09 15:47:05,585 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_3a5dea3d-3788-48a8-b60b-f38679344101/bin/utaipan/data/64a2e2384/dbd0869555ab487cbea8680798860535 [2020-12-09 15:47:05,587 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 15:47:05,588 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 15:47:05,589 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 15:47:05,589 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 15:47:05,592 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 15:47:05,592 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 03:47:05" (1/1) ... [2020-12-09 15:47:05,594 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2c863fa9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 03:47:05, skipping insertion in model container [2020-12-09 15:47:05,594 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 03:47:05" (1/1) ... [2020-12-09 15:47:05,599 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 15:47:05,611 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 15:47:05,724 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_3a5dea3d-3788-48a8-b60b-f38679344101/sv-benchmarks/c/float-newlib/double_req_bl_1232b.c[1958,1971] [2020-12-09 15:47:05,726 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 15:47:05,736 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 15:47:05,755 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_3a5dea3d-3788-48a8-b60b-f38679344101/sv-benchmarks/c/float-newlib/double_req_bl_1232b.c[1958,1971] [2020-12-09 15:47:05,755 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 15:47:05,777 INFO L208 MainTranslator]: Completed translation [2020-12-09 15:47:05,778 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 03:47:05 WrapperNode [2020-12-09 15:47:05,778 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 15:47:05,779 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 15:47:05,779 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 15:47:05,779 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 15:47:05,787 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 03:47:05" (1/1) ... [2020-12-09 15:47:05,797 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 03:47:05" (1/1) ... [2020-12-09 15:47:05,819 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 15:47:05,820 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 15:47:05,820 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 15:47:05,821 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 15:47:05,827 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 03:47:05" (1/1) ... [2020-12-09 15:47:05,827 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 03:47:05" (1/1) ... [2020-12-09 15:47:05,831 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 03:47:05" (1/1) ... [2020-12-09 15:47:05,831 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 03:47:05" (1/1) ... [2020-12-09 15:47:05,840 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 03:47:05" (1/1) ... [2020-12-09 15:47:05,845 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 03:47:05" (1/1) ... [2020-12-09 15:47:05,848 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 03:47:05" (1/1) ... [2020-12-09 15:47:05,852 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 15:47:05,853 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 15:47:05,853 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 15:47:05,853 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 15:47:05,854 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 03:47:05" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3a5dea3d-3788-48a8-b60b-f38679344101/bin/utaipan/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 [2020-12-09 15:47:05,912 INFO L130 BoogieDeclarations]: Found specification of procedure write~intFLOATTYPE8 [2020-12-09 15:47:05,912 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2020-12-09 15:47:05,912 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 15:47:05,912 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2020-12-09 15:47:05,912 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 15:47:05,913 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 15:47:05,913 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-09 15:47:06,167 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 15:47:06,168 INFO L299 CfgBuilder]: Removed 18 assume(true) statements. [2020-12-09 15:47:06,169 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 03:47:06 BoogieIcfgContainer [2020-12-09 15:47:06,169 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 15:47:06,170 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 15:47:06,170 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 15:47:06,172 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 15:47:06,172 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 03:47:05" (1/3) ... [2020-12-09 15:47:06,173 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@560b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 03:47:06, skipping insertion in model container [2020-12-09 15:47:06,173 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 03:47:05" (2/3) ... [2020-12-09 15:47:06,173 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@560b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 03:47:06, skipping insertion in model container [2020-12-09 15:47:06,173 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 03:47:06" (3/3) ... [2020-12-09 15:47:06,174 INFO L111 eAbstractionObserver]: Analyzing ICFG double_req_bl_1232b.c [2020-12-09 15:47:06,186 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 15:47:06,188 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-09 15:47:06,195 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-09 15:47:06,212 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 15:47:06,212 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-09 15:47:06,212 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 15:47:06,212 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 15:47:06,212 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 15:47:06,212 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 15:47:06,212 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 15:47:06,213 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 15:47:06,221 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2020-12-09 15:47:06,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-09 15:47:06,227 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 15:47:06,228 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 15:47:06,228 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 15:47:06,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 15:47:06,232 INFO L82 PathProgramCache]: Analyzing trace with hash -958075201, now seen corresponding path program 1 times [2020-12-09 15:47:06,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 15:47:06,242 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1024673973] [2020-12-09 15:47:06,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3a5dea3d-3788-48a8-b60b-f38679344101/bin/utaipan/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 [2020-12-09 15:47:06,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 15:47:06,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 1 conjunts are in the unsatisfiable core [2020-12-09 15:47:06,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 15:47:06,325 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 15:47:06,325 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 15:47:06,326 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1024673973] [2020-12-09 15:47:06,327 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 15:47:06,327 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 15:47:06,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205698574] [2020-12-09 15:47:06,331 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-09 15:47:06,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 15:47:06,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-09 15:47:06,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-09 15:47:06,345 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 2 states. [2020-12-09 15:47:06,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 15:47:06,361 INFO L93 Difference]: Finished difference Result 62 states and 98 transitions. [2020-12-09 15:47:06,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-09 15:47:06,362 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-12-09 15:47:06,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 15:47:06,369 INFO L225 Difference]: With dead ends: 62 [2020-12-09 15:47:06,369 INFO L226 Difference]: Without dead ends: 29 [2020-12-09 15:47:06,372 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 [2020-12-09 15:47:06,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-12-09 15:47:06,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-12-09 15:47:06,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-12-09 15:47:06,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 40 transitions. [2020-12-09 15:47:06,396 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 40 transitions. Word has length 10 [2020-12-09 15:47:06,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 15:47:06,397 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 40 transitions. [2020-12-09 15:47:06,397 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-09 15:47:06,397 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 40 transitions. [2020-12-09 15:47:06,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-09 15:47:06,398 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 15:47:06,398 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 15:47:06,598 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-12-09 15:47:06,599 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 15:47:06,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 15:47:06,600 INFO L82 PathProgramCache]: Analyzing trace with hash 1001584898, now seen corresponding path program 1 times [2020-12-09 15:47:06,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 15:47:06,601 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [500621012] [2020-12-09 15:47:06,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3a5dea3d-3788-48a8-b60b-f38679344101/bin/utaipan/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 [2020-12-09 15:47:06,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 15:47:06,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-09 15:47:06,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 15:47:06,690 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 15:47:06,691 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 15:47:06,691 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [500621012] [2020-12-09 15:47:06,691 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 15:47:06,691 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 15:47:06,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208024171] [2020-12-09 15:47:06,692 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 15:47:06,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 15:47:06,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 15:47:06,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 15:47:06,693 INFO L87 Difference]: Start difference. First operand 29 states and 40 transitions. Second operand 4 states. [2020-12-09 15:47:06,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 15:47:06,742 INFO L93 Difference]: Finished difference Result 53 states and 67 transitions. [2020-12-09 15:47:06,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 15:47:06,743 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2020-12-09 15:47:06,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 15:47:06,744 INFO L225 Difference]: With dead ends: 53 [2020-12-09 15:47:06,744 INFO L226 Difference]: Without dead ends: 44 [2020-12-09 15:47:06,745 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 [2020-12-09 15:47:06,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-12-09 15:47:06,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 31. [2020-12-09 15:47:06,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-12-09 15:47:06,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2020-12-09 15:47:06,751 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 11 [2020-12-09 15:47:06,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 15:47:06,751 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2020-12-09 15:47:06,752 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 15:47:06,752 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2020-12-09 15:47:06,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-09 15:47:06,752 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 15:47:06,753 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 15:47:06,953 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-12-09 15:47:06,955 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 15:47:06,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 15:47:06,957 INFO L82 PathProgramCache]: Analyzing trace with hash 502201410, now seen corresponding path program 1 times [2020-12-09 15:47:06,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 15:47:06,960 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1085894693] [2020-12-09 15:47:06,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3a5dea3d-3788-48a8-b60b-f38679344101/bin/utaipan/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 [2020-12-09 15:47:07,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 15:47:07,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-09 15:47:07,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 15:47:07,143 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 15:47:07,143 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 15:47:07,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1085894693] [2020-12-09 15:47:07,143 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 15:47:07,143 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 15:47:07,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451466000] [2020-12-09 15:47:07,144 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 15:47:07,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 15:47:07,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 15:47:07,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 15:47:07,145 INFO L87 Difference]: Start difference. First operand 31 states and 42 transitions. Second operand 4 states. [2020-12-09 15:47:07,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 15:47:07,210 INFO L93 Difference]: Finished difference Result 61 states and 79 transitions. [2020-12-09 15:47:07,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 15:47:07,211 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-12-09 15:47:07,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 15:47:07,211 INFO L225 Difference]: With dead ends: 61 [2020-12-09 15:47:07,212 INFO L226 Difference]: Without dead ends: 39 [2020-12-09 15:47:07,212 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 [2020-12-09 15:47:07,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-12-09 15:47:07,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 30. [2020-12-09 15:47:07,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-12-09 15:47:07,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 38 transitions. [2020-12-09 15:47:07,217 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 38 transitions. Word has length 12 [2020-12-09 15:47:07,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 15:47:07,218 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 38 transitions. [2020-12-09 15:47:07,218 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 15:47:07,218 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 38 transitions. [2020-12-09 15:47:07,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-09 15:47:07,218 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 15:47:07,218 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 15:47:07,419 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3 [2020-12-09 15:47:07,420 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 15:47:07,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 15:47:07,421 INFO L82 PathProgramCache]: Analyzing trace with hash -1951233721, now seen corresponding path program 1 times [2020-12-09 15:47:07,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 15:47:07,423 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [184822919] [2020-12-09 15:47:07,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3a5dea3d-3788-48a8-b60b-f38679344101/bin/utaipan/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 [2020-12-09 15:47:07,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 15:47:07,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-09 15:47:07,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 15:47:07,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 15:47:07,501 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 15:47:07,501 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [184822919] [2020-12-09 15:47:07,501 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 15:47:07,501 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 15:47:07,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583789244] [2020-12-09 15:47:07,502 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 15:47:07,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 15:47:07,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 15:47:07,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 15:47:07,503 INFO L87 Difference]: Start difference. First operand 30 states and 38 transitions. Second operand 4 states. [2020-12-09 15:47:07,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 15:47:07,534 INFO L93 Difference]: Finished difference Result 52 states and 62 transitions. [2020-12-09 15:47:07,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 15:47:07,534 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2020-12-09 15:47:07,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 15:47:07,535 INFO L225 Difference]: With dead ends: 52 [2020-12-09 15:47:07,535 INFO L226 Difference]: Without dead ends: 43 [2020-12-09 15:47:07,536 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 [2020-12-09 15:47:07,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-12-09 15:47:07,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 28. [2020-12-09 15:47:07,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-12-09 15:47:07,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 35 transitions. [2020-12-09 15:47:07,539 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 35 transitions. Word has length 13 [2020-12-09 15:47:07,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 15:47:07,539 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 35 transitions. [2020-12-09 15:47:07,539 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 15:47:07,539 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 35 transitions. [2020-12-09 15:47:07,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-09 15:47:07,540 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 15:47:07,540 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 15:47:07,740 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 mathsat -unsat_core_generation=3 [2020-12-09 15:47:07,742 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 15:47:07,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 15:47:07,743 INFO L82 PathProgramCache]: Analyzing trace with hash 1012446717, now seen corresponding path program 1 times [2020-12-09 15:47:07,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 15:47:07,745 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1709624710] [2020-12-09 15:47:07,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3a5dea3d-3788-48a8-b60b-f38679344101/bin/utaipan/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 [2020-12-09 15:47:07,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 15:47:07,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-09 15:47:07,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 15:47:07,886 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 15:47:07,886 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 15:47:07,886 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1709624710] [2020-12-09 15:47:07,886 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 15:47:07,886 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 15:47:07,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189527838] [2020-12-09 15:47:07,887 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 15:47:07,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 15:47:07,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 15:47:07,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 15:47:07,887 INFO L87 Difference]: Start difference. First operand 28 states and 35 transitions. Second operand 4 states. [2020-12-09 15:47:07,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 15:47:07,923 INFO L93 Difference]: Finished difference Result 52 states and 61 transitions. [2020-12-09 15:47:07,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 15:47:07,924 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-12-09 15:47:07,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 15:47:07,924 INFO L225 Difference]: With dead ends: 52 [2020-12-09 15:47:07,924 INFO L226 Difference]: Without dead ends: 43 [2020-12-09 15:47:07,925 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 [2020-12-09 15:47:07,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-12-09 15:47:07,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 30. [2020-12-09 15:47:07,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-12-09 15:47:07,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-12-09 15:47:07,928 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 16 [2020-12-09 15:47:07,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 15:47:07,928 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-12-09 15:47:07,928 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 15:47:07,928 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-12-09 15:47:07,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-09 15:47:07,929 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 15:47:07,929 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 15:47:08,130 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 mathsat -unsat_core_generation=3 [2020-12-09 15:47:08,130 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 15:47:08,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 15:47:08,132 INFO L82 PathProgramCache]: Analyzing trace with hash 874935118, now seen corresponding path program 1 times [2020-12-09 15:47:08,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 15:47:08,134 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1229187939] [2020-12-09 15:47:08,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3a5dea3d-3788-48a8-b60b-f38679344101/bin/utaipan/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 [2020-12-09 15:47:08,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 15:47:08,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-09 15:47:08,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 15:47:08,296 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 15:47:08,296 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 15:47:08,296 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1229187939] [2020-12-09 15:47:08,297 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 15:47:08,297 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-09 15:47:08,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571217146] [2020-12-09 15:47:08,297 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 15:47:08,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 15:47:08,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 15:47:08,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-09 15:47:08,298 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 5 states. [2020-12-09 15:47:08,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 15:47:08,386 INFO L93 Difference]: Finished difference Result 43 states and 52 transitions. [2020-12-09 15:47:08,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 15:47:08,387 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2020-12-09 15:47:08,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 15:47:08,388 INFO L225 Difference]: With dead ends: 43 [2020-12-09 15:47:08,388 INFO L226 Difference]: Without dead ends: 29 [2020-12-09 15:47:08,389 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 [2020-12-09 15:47:08,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-12-09 15:47:08,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-12-09 15:47:08,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-12-09 15:47:08,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2020-12-09 15:47:08,393 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 17 [2020-12-09 15:47:08,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 15:47:08,393 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2020-12-09 15:47:08,393 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 15:47:08,393 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2020-12-09 15:47:08,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-09 15:47:08,394 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 15:47:08,394 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 15:47:08,595 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 mathsat -unsat_core_generation=3 [2020-12-09 15:47:08,596 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 15:47:08,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 15:47:08,598 INFO L82 PathProgramCache]: Analyzing trace with hash -414082333, now seen corresponding path program 1 times [2020-12-09 15:47:08,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 15:47:08,599 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1162154978] [2020-12-09 15:47:08,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3a5dea3d-3788-48a8-b60b-f38679344101/bin/utaipan/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 [2020-12-09 15:47:08,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 15:47:08,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-09 15:47:08,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 15:47:08,747 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 15:47:08,747 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 15:47:08,748 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1162154978] [2020-12-09 15:47:08,748 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 15:47:08,748 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 15:47:08,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830381408] [2020-12-09 15:47:08,748 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 15:47:08,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 15:47:08,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 15:47:08,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 15:47:08,749 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 3 states. [2020-12-09 15:47:08,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 15:47:08,758 INFO L93 Difference]: Finished difference Result 39 states and 43 transitions. [2020-12-09 15:47:08,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 15:47:08,759 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-12-09 15:47:08,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 15:47:08,759 INFO L225 Difference]: With dead ends: 39 [2020-12-09 15:47:08,759 INFO L226 Difference]: Without dead ends: 29 [2020-12-09 15:47:08,759 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 [2020-12-09 15:47:08,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-12-09 15:47:08,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-12-09 15:47:08,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-12-09 15:47:08,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2020-12-09 15:47:08,762 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 18 [2020-12-09 15:47:08,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 15:47:08,763 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2020-12-09 15:47:08,763 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 15:47:08,763 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2020-12-09 15:47:08,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-09 15:47:08,763 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 15:47:08,763 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 15:47:08,964 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 mathsat -unsat_core_generation=3 [2020-12-09 15:47:08,965 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 15:47:08,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 15:47:08,966 INFO L82 PathProgramCache]: Analyzing trace with hash -356824031, now seen corresponding path program 1 times [2020-12-09 15:47:08,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 15:47:08,967 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [14792684] [2020-12-09 15:47:08,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3a5dea3d-3788-48a8-b60b-f38679344101/bin/utaipan/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 [2020-12-09 15:47:09,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 15:47:09,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-09 15:47:09,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 15:47:09,110 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 15:47:09,110 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 15:47:09,111 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [14792684] [2020-12-09 15:47:09,111 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 15:47:09,111 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-09 15:47:09,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780513695] [2020-12-09 15:47:09,111 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-09 15:47:09,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 15:47:09,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-09 15:47:09,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-09 15:47:09,112 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand 6 states. [2020-12-09 15:47:09,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 15:47:09,176 INFO L93 Difference]: Finished difference Result 41 states and 43 transitions. [2020-12-09 15:47:09,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-09 15:47:09,176 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2020-12-09 15:47:09,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 15:47:09,177 INFO L225 Difference]: With dead ends: 41 [2020-12-09 15:47:09,177 INFO L226 Difference]: Without dead ends: 38 [2020-12-09 15:47:09,177 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 [2020-12-09 15:47:09,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-12-09 15:47:09,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 31. [2020-12-09 15:47:09,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-12-09 15:47:09,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2020-12-09 15:47:09,180 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 18 [2020-12-09 15:47:09,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 15:47:09,181 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2020-12-09 15:47:09,181 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-09 15:47:09,181 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2020-12-09 15:47:09,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-09 15:47:09,181 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 15:47:09,181 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 15:47:09,382 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 mathsat -unsat_core_generation=3 [2020-12-09 15:47:09,383 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 15:47:09,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 15:47:09,385 INFO L82 PathProgramCache]: Analyzing trace with hash 1049593954, now seen corresponding path program 1 times [2020-12-09 15:47:09,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 15:47:09,386 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [233716661] [2020-12-09 15:47:09,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3a5dea3d-3788-48a8-b60b-f38679344101/bin/utaipan/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 [2020-12-09 15:47:09,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 15:47:09,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-09 15:47:09,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 15:47:09,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 15:47:09,533 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 15:47:09,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [233716661] [2020-12-09 15:47:09,533 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 15:47:09,533 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 15:47:09,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826329455] [2020-12-09 15:47:09,534 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 15:47:09,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 15:47:09,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 15:47:09,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 15:47:09,535 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand 4 states. [2020-12-09 15:47:09,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 15:47:09,575 INFO L93 Difference]: Finished difference Result 51 states and 52 transitions. [2020-12-09 15:47:09,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 15:47:09,575 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2020-12-09 15:47:09,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 15:47:09,576 INFO L225 Difference]: With dead ends: 51 [2020-12-09 15:47:09,576 INFO L226 Difference]: Without dead ends: 42 [2020-12-09 15:47:09,576 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 [2020-12-09 15:47:09,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-12-09 15:47:09,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 27. [2020-12-09 15:47:09,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-12-09 15:47:09,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-12-09 15:47:09,581 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 18 [2020-12-09 15:47:09,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 15:47:09,581 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-12-09 15:47:09,581 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 15:47:09,581 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-12-09 15:47:09,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-09 15:47:09,582 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 15:47:09,582 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] [2020-12-09 15:47:09,783 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 mathsat -unsat_core_generation=3 [2020-12-09 15:47:09,784 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 15:47:09,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 15:47:09,785 INFO L82 PathProgramCache]: Analyzing trace with hash -1524231306, now seen corresponding path program 1 times [2020-12-09 15:47:09,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 15:47:09,787 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1449193395] [2020-12-09 15:47:09,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3a5dea3d-3788-48a8-b60b-f38679344101/bin/utaipan/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 [2020-12-09 15:47:09,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 15:47:09,915 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 15:47:09,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 15:47:09,988 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 15:47:10,024 INFO L173 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2020-12-09 15:47:10,024 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-09 15:47:10,225 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 mathsat -unsat_core_generation=3 [2020-12-09 15:47:10,282 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 03:47:10 BoogieIcfgContainer [2020-12-09 15:47:10,282 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 15:47:10,282 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 15:47:10,282 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 15:47:10,283 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 15:47:10,283 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 03:47:06" (3/4) ... [2020-12-09 15:47:10,284 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-12-09 15:47:10,316 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_3a5dea3d-3788-48a8-b60b-f38679344101/bin/utaipan/witness.graphml [2020-12-09 15:47:10,317 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 15:47:10,318 INFO L168 Benchmark]: Toolchain (without parser) took 4728.94 ms. Allocated memory was 50.3 MB in the beginning and 73.4 MB in the end (delta: 23.1 MB). Free memory was 26.5 MB in the beginning and 31.3 MB in the end (delta: -4.8 MB). Peak memory consumption was 17.1 MB. Max. memory is 16.1 GB. [2020-12-09 15:47:10,318 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 50.3 MB. Free memory is still 33.1 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 15:47:10,318 INFO L168 Benchmark]: CACSL2BoogieTranslator took 188.76 ms. Allocated memory was 50.3 MB in the beginning and 60.8 MB in the end (delta: 10.5 MB). Free memory was 26.4 MB in the beginning and 44.5 MB in the end (delta: -18.1 MB). Peak memory consumption was 5.5 MB. Max. memory is 16.1 GB. [2020-12-09 15:47:10,319 INFO L168 Benchmark]: Boogie Procedure Inliner took 40.96 ms. Allocated memory is still 60.8 MB. Free memory was 44.3 MB in the beginning and 42.6 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 15:47:10,319 INFO L168 Benchmark]: Boogie Preprocessor took 31.59 ms. Allocated memory is still 60.8 MB. Free memory was 42.6 MB in the beginning and 40.9 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 15:47:10,320 INFO L168 Benchmark]: RCFGBuilder took 316.37 ms. Allocated memory is still 60.8 MB. Free memory was 40.9 MB in the beginning and 34.2 MB in the end (delta: 6.8 MB). Peak memory consumption was 13.9 MB. Max. memory is 16.1 GB. [2020-12-09 15:47:10,320 INFO L168 Benchmark]: TraceAbstraction took 4111.96 ms. Allocated memory was 60.8 MB in the beginning and 73.4 MB in the end (delta: 12.6 MB). Free memory was 33.7 MB in the beginning and 34.1 MB in the end (delta: -379.9 kB). Peak memory consumption was 13.6 MB. Max. memory is 16.1 GB. [2020-12-09 15:47:10,320 INFO L168 Benchmark]: Witness Printer took 34.32 ms. Allocated memory is still 73.4 MB. Free memory was 33.5 MB in the beginning and 31.3 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 15:47:10,322 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11 ms. Allocated memory is still 50.3 MB. Free memory is still 33.1 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 188.76 ms. Allocated memory was 50.3 MB in the beginning and 60.8 MB in the end (delta: 10.5 MB). Free memory was 26.4 MB in the beginning and 44.5 MB in the end (delta: -18.1 MB). Peak memory consumption was 5.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 40.96 ms. Allocated memory is still 60.8 MB. Free memory was 44.3 MB in the beginning and 42.6 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 31.59 ms. Allocated memory is still 60.8 MB. Free memory was 42.6 MB in the beginning and 40.9 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 316.37 ms. Allocated memory is still 60.8 MB. Free memory was 40.9 MB in the beginning and 34.2 MB in the end (delta: 6.8 MB). Peak memory consumption was 13.9 MB. Max. memory is 16.1 GB. * TraceAbstraction took 4111.96 ms. Allocated memory was 60.8 MB in the beginning and 73.4 MB in the end (delta: 12.6 MB). Free memory was 33.7 MB in the beginning and 34.1 MB in the end (delta: -379.9 kB). Peak memory consumption was 13.6 MB. Max. memory is 16.1 GB. * Witness Printer took 34.32 ms. Allocated memory is still 73.4 MB. Free memory was 33.5 MB in the beginning and 31.3 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: 82]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L76] double x = -0.0; [L77] double y = 0.0; [L21] __uint32_t msw, lsw; [L24] ieee_double_shape_type ew_u; [L25] ew_u.value = (x) [L26] EXPR ew_u.parts.msw [L26] (msw) = ew_u.parts.msw [L27] EXPR ew_u.parts.lsw [L27] (lsw) = ew_u.parts.lsw [L30-L31] COND TRUE (msw == 0x00000000 && lsw == 0x00000000) || (msw == 0x80000000 && lsw == 0x00000000) [L32] return 2; [L48] COND FALSE !(__fpclassify_double(x) == 0) [L21] __uint32_t msw, lsw; [L24] ieee_double_shape_type ew_u; [L25] ew_u.value = (x) [L26] EXPR ew_u.parts.msw [L26] (msw) = ew_u.parts.msw [L27] EXPR ew_u.parts.lsw [L27] (lsw) = ew_u.parts.lsw [L30-L31] COND TRUE (msw == 0x00000000 && lsw == 0x00000000) || (msw == 0x80000000 && lsw == 0x00000000) [L32] return 2; [L50] COND FALSE !(__fpclassify_double(y) == 0) [L53] EXPR x < y ? x : y [L53] return x < y ? x : y; [L78] double res = fmin_double(x, y); [L81] EXPR res == -0.0 && __signbit_double(res) == 1 [L57] __uint32_t msw; [L60] ieee_double_shape_type gh_u; [L61] gh_u.value = (x) [L62] EXPR gh_u.parts.msw [L62] (msw) = gh_u.parts.msw [L65] return (msw & 0x80000000) != 0; [L81] EXPR res == -0.0 && __signbit_double(res) == 1 [L81] COND TRUE !(res == -0.0 && __signbit_double(res) == 1) [L82] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 32 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 4.0s, OverallIterations: 10, TraceHistogramMax: 1, AutomataDifference: 0.4s, 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, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 135 GetRequests, 105 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s 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, 0.3s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 155 NumberOfCodeBlocks, 155 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 124 ConstructedInterpolants, 6 QuantifiedInterpolants, 5197 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...