./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 4e77c044 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37a5cc0c-7eaf-4659-a4f5-45e029741e32/bin/utaipan-q2qaUkNPG8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37a5cc0c-7eaf-4659-a4f5-45e029741e32/bin/utaipan-q2qaUkNPG8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37a5cc0c-7eaf-4659-a4f5-45e029741e32/bin/utaipan-q2qaUkNPG8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37a5cc0c-7eaf-4659-a4f5-45e029741e32/bin/utaipan-q2qaUkNPG8/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-newlib/double_req_bl_1232b.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37a5cc0c-7eaf-4659-a4f5-45e029741e32/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37a5cc0c-7eaf-4659-a4f5-45e029741e32/bin/utaipan-q2qaUkNPG8 --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_worker_vcloud-master_on_vcloud-master/run_dir_37a5cc0c-7eaf-4659-a4f5-45e029741e32/bin/utaipan-q2qaUkNPG8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37a5cc0c-7eaf-4659-a4f5-45e029741e32/bin/utaipan-q2qaUkNPG8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37a5cc0c-7eaf-4659-a4f5-45e029741e32/bin/utaipan-q2qaUkNPG8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37a5cc0c-7eaf-4659-a4f5-45e029741e32/bin/utaipan-q2qaUkNPG8/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-newlib/double_req_bl_1232b.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37a5cc0c-7eaf-4659-a4f5-45e029741e32/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37a5cc0c-7eaf-4659-a4f5-45e029741e32/bin/utaipan-q2qaUkNPG8 --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 0.2.1-dev-4e77c04 [2021-10-13 07:11:52,527 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 07:11:52,530 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 07:11:52,567 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 07:11:52,568 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 07:11:52,569 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 07:11:52,571 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 07:11:52,573 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 07:11:52,575 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 07:11:52,577 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 07:11:52,578 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 07:11:52,579 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 07:11:52,580 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 07:11:52,581 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 07:11:52,583 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 07:11:52,584 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 07:11:52,585 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 07:11:52,587 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 07:11:52,589 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 07:11:52,591 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 07:11:52,593 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 07:11:52,603 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 07:11:52,604 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 07:11:52,609 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 07:11:52,613 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 07:11:52,613 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 07:11:52,614 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 07:11:52,615 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 07:11:52,615 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 07:11:52,616 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 07:11:52,617 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 07:11:52,618 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 07:11:52,619 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 07:11:52,620 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 07:11:52,621 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 07:11:52,621 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 07:11:52,622 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 07:11:52,623 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 07:11:52,623 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 07:11:52,624 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 07:11:52,625 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 07:11:52,625 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37a5cc0c-7eaf-4659-a4f5-45e029741e32/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-13 07:11:52,649 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 07:11:52,649 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 07:11:52,650 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-13 07:11:52,650 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-13 07:11:52,651 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-13 07:11:52,651 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-13 07:11:52,651 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-13 07:11:52,651 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-13 07:11:52,651 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-13 07:11:52,652 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-13 07:11:52,652 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-13 07:11:52,652 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-13 07:11:52,652 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-13 07:11:52,652 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-13 07:11:52,653 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-13 07:11:52,653 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 07:11:52,654 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 07:11:52,654 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-13 07:11:52,654 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 07:11:52,654 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 07:11:52,654 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-13 07:11:52,654 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 07:11:52,655 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-13 07:11:52,655 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 07:11:52,655 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 07:11:52,655 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-13 07:11:52,655 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 07:11:52,655 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-13 07:11:52,656 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 07:11:52,656 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 07:11:52,656 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:11:52,656 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 07:11:52,656 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 07:11:52,657 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-13 07:11:52,657 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-13 07:11:52,657 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-13 07:11:52,657 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-13 07:11:52,657 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 07:11:52,657 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-13 07:11:52,658 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37a5cc0c-7eaf-4659-a4f5-45e029741e32/bin/utaipan-q2qaUkNPG8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37a5cc0c-7eaf-4659-a4f5-45e029741e32/bin/utaipan-q2qaUkNPG8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c8aa0f6d603c21abbc49650bbaaea4f693aff7f0 [2021-10-13 07:11:52,894 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 07:11:52,919 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 07:11:52,922 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 07:11:52,923 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 07:11:52,924 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 07:11:52,925 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37a5cc0c-7eaf-4659-a4f5-45e029741e32/bin/utaipan-q2qaUkNPG8/../../sv-benchmarks/c/float-newlib/double_req_bl_1232b.c [2021-10-13 07:11:53,010 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37a5cc0c-7eaf-4659-a4f5-45e029741e32/bin/utaipan-q2qaUkNPG8/data/ca005472f/fcf17cb3f32f46b2b2fbb7bbd04d915c/FLAG96f2b0267 [2021-10-13 07:11:53,492 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 07:11:53,493 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37a5cc0c-7eaf-4659-a4f5-45e029741e32/sv-benchmarks/c/float-newlib/double_req_bl_1232b.c [2021-10-13 07:11:53,505 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37a5cc0c-7eaf-4659-a4f5-45e029741e32/bin/utaipan-q2qaUkNPG8/data/ca005472f/fcf17cb3f32f46b2b2fbb7bbd04d915c/FLAG96f2b0267 [2021-10-13 07:11:53,863 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37a5cc0c-7eaf-4659-a4f5-45e029741e32/bin/utaipan-q2qaUkNPG8/data/ca005472f/fcf17cb3f32f46b2b2fbb7bbd04d915c [2021-10-13 07:11:53,866 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 07:11:53,867 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 07:11:53,881 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 07:11:53,882 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 07:11:53,884 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 07:11:53,885 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:11:53" (1/1) ... [2021-10-13 07:11:53,886 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3017f82e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:11:53, skipping insertion in model container [2021-10-13 07:11:53,886 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:11:53" (1/1) ... [2021-10-13 07:11:53,893 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 07:11:53,908 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 07:11:54,095 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37a5cc0c-7eaf-4659-a4f5-45e029741e32/sv-benchmarks/c/float-newlib/double_req_bl_1232b.c[1958,1971] [2021-10-13 07:11:54,098 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:11:54,105 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 07:11:54,127 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37a5cc0c-7eaf-4659-a4f5-45e029741e32/sv-benchmarks/c/float-newlib/double_req_bl_1232b.c[1958,1971] [2021-10-13 07:11:54,128 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:11:54,142 INFO L208 MainTranslator]: Completed translation [2021-10-13 07:11:54,142 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:11:54 WrapperNode [2021-10-13 07:11:54,142 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 07:11:54,143 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 07:11:54,143 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 07:11:54,143 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 07:11:54,150 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:11:54" (1/1) ... [2021-10-13 07:11:54,157 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:11:54" (1/1) ... [2021-10-13 07:11:54,180 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 07:11:54,181 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 07:11:54,181 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 07:11:54,182 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 07:11:54,189 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:11:54" (1/1) ... [2021-10-13 07:11:54,190 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:11:54" (1/1) ... [2021-10-13 07:11:54,193 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:11:54" (1/1) ... [2021-10-13 07:11:54,193 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:11:54" (1/1) ... [2021-10-13 07:11:54,201 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:11:54" (1/1) ... [2021-10-13 07:11:54,206 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:11:54" (1/1) ... [2021-10-13 07:11:54,207 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:11:54" (1/1) ... [2021-10-13 07:11:54,210 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 07:11:54,211 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 07:11:54,211 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 07:11:54,212 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 07:11:54,212 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:11:54" (1/1) ... [2021-10-13 07:11:54,219 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:11:54,233 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37a5cc0c-7eaf-4659-a4f5-45e029741e32/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:11:54,251 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37a5cc0c-7eaf-4659-a4f5-45e029741e32/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 07:11:54,259 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37a5cc0c-7eaf-4659-a4f5-45e029741e32/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 07:11:54,292 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-13 07:11:54,292 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 07:11:54,292 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2021-10-13 07:11:54,292 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 07:11:54,292 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 07:11:54,292 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-13 07:11:54,293 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-13 07:11:54,975 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 07:11:54,975 INFO L299 CfgBuilder]: Removed 18 assume(true) statements. [2021-10-13 07:11:54,977 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:11:54 BoogieIcfgContainer [2021-10-13 07:11:54,977 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 07:11:54,979 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 07:11:54,979 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 07:11:54,989 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 07:11:54,989 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 07:11:53" (1/3) ... [2021-10-13 07:11:54,990 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c8c1695 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:11:54, skipping insertion in model container [2021-10-13 07:11:54,990 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:11:54" (2/3) ... [2021-10-13 07:11:54,990 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c8c1695 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:11:54, skipping insertion in model container [2021-10-13 07:11:54,991 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:11:54" (3/3) ... [2021-10-13 07:11:54,992 INFO L111 eAbstractionObserver]: Analyzing ICFG double_req_bl_1232b.c [2021-10-13 07:11:54,997 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 07:11:54,997 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-13 07:11:55,039 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 07:11:55,045 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-13 07:11:55,045 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-13 07:11:55,056 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 16 states have (on average 1.625) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:11:55,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-13 07:11:55,060 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:11:55,061 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:11:55,061 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:11:55,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:11:55,067 INFO L82 PathProgramCache]: Analyzing trace with hash 1433219361, now seen corresponding path program 1 times [2021-10-13 07:11:55,076 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:11:55,076 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548964483] [2021-10-13 07:11:55,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:11:55,077 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:11:55,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:11:55,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:11:55,233 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:11:55,234 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548964483] [2021-10-13 07:11:55,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548964483] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:11:55,235 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:11:55,235 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-13 07:11:55,238 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677387847] [2021-10-13 07:11:55,251 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-13 07:11:55,252 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:11:55,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-13 07:11:55,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-13 07:11:55,273 INFO L87 Difference]: Start difference. First operand has 18 states, 16 states have (on average 1.625) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:11:55,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:11:55,297 INFO L93 Difference]: Finished difference Result 35 states and 51 transitions. [2021-10-13 07:11:55,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-13 07:11:55,299 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-10-13 07:11:55,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:11:55,310 INFO L225 Difference]: With dead ends: 35 [2021-10-13 07:11:55,310 INFO L226 Difference]: Without dead ends: 16 [2021-10-13 07:11:55,314 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-13 07:11:55,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-10-13 07:11:55,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-10-13 07:11:55,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 15 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:11:55,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2021-10-13 07:11:55,344 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 8 [2021-10-13 07:11:55,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:11:55,345 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2021-10-13 07:11:55,345 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:11:55,345 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2021-10-13 07:11:55,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-13 07:11:55,346 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:11:55,346 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:11:55,347 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-13 07:11:55,347 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:11:55,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:11:55,348 INFO L82 PathProgramCache]: Analyzing trace with hash -2131701560, now seen corresponding path program 1 times [2021-10-13 07:11:55,348 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:11:55,349 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624338742] [2021-10-13 07:11:55,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:11:55,349 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:11:55,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 07:11:55,395 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-13 07:11:55,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 07:11:55,456 INFO L133 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-10-13 07:11:55,457 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-13 07:11:55,459 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-13 07:11:55,461 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-13 07:11:55,467 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-13 07:11:55,491 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 07:11:55 BoogieIcfgContainer [2021-10-13 07:11:55,493 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-13 07:11:55,495 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-13 07:11:55,495 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-13 07:11:55,495 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-13 07:11:55,497 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:11:54" (3/4) ... [2021-10-13 07:11:55,500 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-13 07:11:55,500 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-13 07:11:55,502 INFO L168 Benchmark]: Toolchain (without parser) took 1633.87 ms. Allocated memory was 94.4 MB in the beginning and 113.2 MB in the end (delta: 18.9 MB). Free memory was 55.7 MB in the beginning and 76.6 MB in the end (delta: -20.9 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 07:11:55,503 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 94.4 MB. Free memory is still 71.9 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 07:11:55,504 INFO L168 Benchmark]: CACSL2BoogieTranslator took 261.22 ms. Allocated memory is still 94.4 MB. Free memory was 55.6 MB in the beginning and 69.8 MB in the end (delta: -14.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-13 07:11:55,506 INFO L168 Benchmark]: Boogie Procedure Inliner took 37.43 ms. Allocated memory is still 94.4 MB. Free memory was 69.7 MB in the beginning and 67.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 07:11:55,511 INFO L168 Benchmark]: Boogie Preprocessor took 29.34 ms. Allocated memory is still 94.4 MB. Free memory was 67.7 MB in the beginning and 66.3 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 07:11:55,513 INFO L168 Benchmark]: RCFGBuilder took 766.00 ms. Allocated memory is still 94.4 MB. Free memory was 66.3 MB in the beginning and 42.5 MB in the end (delta: 23.8 MB). Peak memory consumption was 25.2 MB. Max. memory is 16.1 GB. [2021-10-13 07:11:55,513 INFO L168 Benchmark]: TraceAbstraction took 514.59 ms. Allocated memory was 94.4 MB in the beginning and 113.2 MB in the end (delta: 18.9 MB). Free memory was 41.6 MB in the beginning and 77.1 MB in the end (delta: -35.5 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 07:11:55,514 INFO L168 Benchmark]: Witness Printer took 5.71 ms. Allocated memory is still 113.2 MB. Free memory was 77.1 MB in the beginning and 76.6 MB in the end (delta: 495.8 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 07:11:55,522 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 94.4 MB. Free memory is still 71.9 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 261.22 ms. Allocated memory is still 94.4 MB. Free memory was 55.6 MB in the beginning and 69.8 MB in the end (delta: -14.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 37.43 ms. Allocated memory is still 94.4 MB. Free memory was 69.7 MB in the beginning and 67.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 29.34 ms. Allocated memory is still 94.4 MB. Free memory was 67.7 MB in the beginning and 66.3 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 766.00 ms. Allocated memory is still 94.4 MB. Free memory was 66.3 MB in the beginning and 42.5 MB in the end (delta: 23.8 MB). Peak memory consumption was 25.2 MB. Max. memory is 16.1 GB. * TraceAbstraction took 514.59 ms. Allocated memory was 94.4 MB in the beginning and 113.2 MB in the end (delta: 18.9 MB). Free memory was 41.6 MB in the beginning and 77.1 MB in the end (delta: -35.5 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 5.71 ms. Allocated memory is still 113.2 MB. Free memory was 77.1 MB in the beginning and 76.6 MB in the end (delta: 495.8 kB). There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 82]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of someBinaryDOUBLEComparisonOperation at line 81, overapproximation of someUnaryDOUBLEoperation at line 76. Possible FailurePath: [L76] double x = -0.0; [L77] double y = 0.0; [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. OverallTime: 428.1ms, OverallIterations: 2, TraceHistogramMax: 1, EmptinessCheckTime: 7.7ms, AutomataDifference: 60.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 7.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 19 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=18occurred in iteration=0, InterpolantAutomatonStates: 2, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 15.4ms AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 7.7ms SsaConstructionTime, 62.7ms SatisfiabilityAnalysisTime, 81.4ms InterpolantComputationTime, 17 NumberOfCodeBlocks, 17 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 7 ConstructedInterpolants, 0 QuantifiedInterpolants, 7 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-10-13 07:11:55,573 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37a5cc0c-7eaf-4659-a4f5-45e029741e32/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.1-dev-4e77c04 [2021-10-13 07:11:58,066 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 07:11:58,069 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 07:11:58,129 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 07:11:58,129 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 07:11:58,135 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 07:11:58,137 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 07:11:58,142 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 07:11:58,145 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 07:11:58,156 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 07:11:58,157 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 07:11:58,158 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 07:11:58,159 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 07:11:58,160 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 07:11:58,161 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 07:11:58,163 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 07:11:58,164 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 07:11:58,165 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 07:11:58,177 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 07:11:58,179 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 07:11:58,181 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 07:11:58,182 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 07:11:58,184 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 07:11:58,185 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 07:11:58,188 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 07:11:58,189 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 07:11:58,189 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 07:11:58,190 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 07:11:58,191 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 07:11:58,192 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 07:11:58,192 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 07:11:58,193 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 07:11:58,194 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 07:11:58,195 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 07:11:58,197 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 07:11:58,197 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 07:11:58,198 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 07:11:58,198 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 07:11:58,199 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 07:11:58,200 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 07:11:58,201 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 07:11:58,202 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37a5cc0c-7eaf-4659-a4f5-45e029741e32/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-10-13 07:11:58,227 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 07:11:58,228 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 07:11:58,229 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-13 07:11:58,229 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-13 07:11:58,229 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-13 07:11:58,229 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-13 07:11:58,230 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-13 07:11:58,230 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-13 07:11:58,230 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-13 07:11:58,231 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 07:11:58,231 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 07:11:58,231 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 07:11:58,231 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 07:11:58,232 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-13 07:11:58,232 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 07:11:58,232 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-13 07:11:58,232 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 07:11:58,232 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-13 07:11:58,233 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-13 07:11:58,233 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 07:11:58,233 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-13 07:11:58,233 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 07:11:58,233 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-13 07:11:58,234 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 07:11:58,234 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-13 07:11:58,234 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 07:11:58,234 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:11:58,235 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 07:11:58,235 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 07:11:58,235 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-13 07:11:58,235 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-10-13 07:11:58,235 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-13 07:11:58,236 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-13 07:11:58,236 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 07:11:58,236 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-13 07:11:58,236 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37a5cc0c-7eaf-4659-a4f5-45e029741e32/bin/utaipan-q2qaUkNPG8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37a5cc0c-7eaf-4659-a4f5-45e029741e32/bin/utaipan-q2qaUkNPG8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c8aa0f6d603c21abbc49650bbaaea4f693aff7f0 [2021-10-13 07:11:58,633 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 07:11:58,667 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 07:11:58,670 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 07:11:58,671 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 07:11:58,672 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 07:11:58,675 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37a5cc0c-7eaf-4659-a4f5-45e029741e32/bin/utaipan-q2qaUkNPG8/../../sv-benchmarks/c/float-newlib/double_req_bl_1232b.c [2021-10-13 07:11:58,754 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37a5cc0c-7eaf-4659-a4f5-45e029741e32/bin/utaipan-q2qaUkNPG8/data/c427ac5cc/f91cc3e9843f48939822be48a3afe1da/FLAG862aa7ad4 [2021-10-13 07:11:59,322 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 07:11:59,326 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37a5cc0c-7eaf-4659-a4f5-45e029741e32/sv-benchmarks/c/float-newlib/double_req_bl_1232b.c [2021-10-13 07:11:59,335 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37a5cc0c-7eaf-4659-a4f5-45e029741e32/bin/utaipan-q2qaUkNPG8/data/c427ac5cc/f91cc3e9843f48939822be48a3afe1da/FLAG862aa7ad4 [2021-10-13 07:11:59,683 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37a5cc0c-7eaf-4659-a4f5-45e029741e32/bin/utaipan-q2qaUkNPG8/data/c427ac5cc/f91cc3e9843f48939822be48a3afe1da [2021-10-13 07:11:59,686 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 07:11:59,691 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 07:11:59,692 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 07:11:59,693 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 07:11:59,698 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 07:11:59,699 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:11:59" (1/1) ... [2021-10-13 07:11:59,702 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@406b1589 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:11:59, skipping insertion in model container [2021-10-13 07:11:59,702 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:11:59" (1/1) ... [2021-10-13 07:11:59,709 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 07:11:59,729 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 07:11:59,884 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37a5cc0c-7eaf-4659-a4f5-45e029741e32/sv-benchmarks/c/float-newlib/double_req_bl_1232b.c[1958,1971] [2021-10-13 07:11:59,887 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:11:59,917 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 07:11:59,965 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37a5cc0c-7eaf-4659-a4f5-45e029741e32/sv-benchmarks/c/float-newlib/double_req_bl_1232b.c[1958,1971] [2021-10-13 07:11:59,966 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:11:59,997 INFO L208 MainTranslator]: Completed translation [2021-10-13 07:11:59,997 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:11:59 WrapperNode [2021-10-13 07:11:59,997 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 07:11:59,998 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 07:11:59,998 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 07:11:59,999 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 07:12:00,006 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:11:59" (1/1) ... [2021-10-13 07:12:00,017 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:11:59" (1/1) ... [2021-10-13 07:12:00,045 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 07:12:00,048 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 07:12:00,048 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 07:12:00,048 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 07:12:00,055 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:11:59" (1/1) ... [2021-10-13 07:12:00,056 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:11:59" (1/1) ... [2021-10-13 07:12:00,060 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:11:59" (1/1) ... [2021-10-13 07:12:00,060 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:11:59" (1/1) ... [2021-10-13 07:12:00,070 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:11:59" (1/1) ... [2021-10-13 07:12:00,079 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:11:59" (1/1) ... [2021-10-13 07:12:00,082 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:11:59" (1/1) ... [2021-10-13 07:12:00,086 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 07:12:00,087 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 07:12:00,087 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 07:12:00,087 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 07:12:00,088 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:11:59" (1/1) ... [2021-10-13 07:12:00,095 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:12:00,106 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37a5cc0c-7eaf-4659-a4f5-45e029741e32/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:12:00,119 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37a5cc0c-7eaf-4659-a4f5-45e029741e32/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 07:12:00,135 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37a5cc0c-7eaf-4659-a4f5-45e029741e32/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 07:12:00,162 INFO L130 BoogieDeclarations]: Found specification of procedure write~intFLOATTYPE8 [2021-10-13 07:12:00,162 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-13 07:12:00,162 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 07:12:00,162 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-10-13 07:12:00,162 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 07:12:00,163 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 07:12:00,163 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-13 07:12:00,479 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 07:12:00,479 INFO L299 CfgBuilder]: Removed 18 assume(true) statements. [2021-10-13 07:12:00,481 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:12:00 BoogieIcfgContainer [2021-10-13 07:12:00,481 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 07:12:00,483 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 07:12:00,483 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 07:12:00,486 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 07:12:00,486 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 07:11:59" (1/3) ... [2021-10-13 07:12:00,487 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50f0cbac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:12:00, skipping insertion in model container [2021-10-13 07:12:00,487 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:11:59" (2/3) ... [2021-10-13 07:12:00,488 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50f0cbac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:12:00, skipping insertion in model container [2021-10-13 07:12:00,488 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:12:00" (3/3) ... [2021-10-13 07:12:00,490 INFO L111 eAbstractionObserver]: Analyzing ICFG double_req_bl_1232b.c [2021-10-13 07:12:00,504 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 07:12:00,504 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-13 07:12:00,596 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 07:12:00,612 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-13 07:12:00,614 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-13 07:12:00,630 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 31 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:12:00,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-13 07:12:00,636 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:12:00,666 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:12:00,667 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:12:00,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:12:00,673 INFO L82 PathProgramCache]: Analyzing trace with hash -958075201, now seen corresponding path program 1 times [2021-10-13 07:12:00,689 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:12:00,690 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2144981349] [2021-10-13 07:12:00,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:12:00,692 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:12:00,692 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37a5cc0c-7eaf-4659-a4f5-45e029741e32/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:12:00,695 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37a5cc0c-7eaf-4659-a4f5-45e029741e32/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:12:00,721 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37a5cc0c-7eaf-4659-a4f5-45e029741e32/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-13 07:12:00,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:12:00,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 1 conjunts are in the unsatisfiable core [2021-10-13 07:12:00,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:12:00,888 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:12:00,888 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:12:00,962 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:12:00,963 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:12:00,963 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2144981349] [2021-10-13 07:12:00,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2144981349] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:12:00,964 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:12:00,965 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-13 07:12:00,966 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259044908] [2021-10-13 07:12:00,972 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-13 07:12:00,974 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:12:00,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-13 07:12:00,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-13 07:12:00,996 INFO L87 Difference]: Start difference. First operand has 32 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 31 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:12:01,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:12:01,019 INFO L93 Difference]: Finished difference Result 62 states and 98 transitions. [2021-10-13 07:12:01,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-13 07:12:01,021 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-10-13 07:12:01,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:12:01,031 INFO L225 Difference]: With dead ends: 62 [2021-10-13 07:12:01,031 INFO L226 Difference]: Without dead ends: 29 [2021-10-13 07:12:01,035 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-13 07:12:01,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-10-13 07:12:01,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-10-13 07:12:01,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.4285714285714286) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:12:01,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 40 transitions. [2021-10-13 07:12:01,077 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 40 transitions. Word has length 10 [2021-10-13 07:12:01,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:12:01,078 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 40 transitions. [2021-10-13 07:12:01,079 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:12:01,079 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 40 transitions. [2021-10-13 07:12:01,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-13 07:12:01,080 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:12:01,080 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:12:01,095 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37a5cc0c-7eaf-4659-a4f5-45e029741e32/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-13 07:12:01,296 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37a5cc0c-7eaf-4659-a4f5-45e029741e32/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:12:01,296 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:12:01,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:12:01,297 INFO L82 PathProgramCache]: Analyzing trace with hash 1001584898, now seen corresponding path program 1 times [2021-10-13 07:12:01,298 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:12:01,298 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [255903869] [2021-10-13 07:12:01,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:12:01,299 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:12:01,299 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37a5cc0c-7eaf-4659-a4f5-45e029741e32/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:12:01,304 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37a5cc0c-7eaf-4659-a4f5-45e029741e32/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:12:01,308 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37a5cc0c-7eaf-4659-a4f5-45e029741e32/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-13 07:12:01,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:12:01,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-13 07:12:01,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:12:01,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:12:01,512 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:12:01,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:12:01,563 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:12:01,563 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [255903869] [2021-10-13 07:12:01,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [255903869] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:12:01,564 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:12:01,564 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-10-13 07:12:01,564 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507566656] [2021-10-13 07:12:01,565 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 07:12:01,566 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:12:01,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 07:12:01,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-13 07:12:01,567 INFO L87 Difference]: Start difference. First operand 29 states and 40 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:12:01,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:12:01,693 INFO L93 Difference]: Finished difference Result 68 states and 85 transitions. [2021-10-13 07:12:01,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-13 07:12:01,694 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-10-13 07:12:01,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:12:01,695 INFO L225 Difference]: With dead ends: 68 [2021-10-13 07:12:01,696 INFO L226 Difference]: Without dead ends: 59 [2021-10-13 07:12:01,697 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 36.4ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-13 07:12:01,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-10-13 07:12:01,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 31. [2021-10-13 07:12:01,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.4) internal successors, (42), 30 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:12:01,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2021-10-13 07:12:01,704 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 11 [2021-10-13 07:12:01,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:12:01,704 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2021-10-13 07:12:01,705 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:12:01,705 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2021-10-13 07:12:01,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-13 07:12:01,706 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:12:01,706 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:12:01,721 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37a5cc0c-7eaf-4659-a4f5-45e029741e32/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-13 07:12:01,906 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37a5cc0c-7eaf-4659-a4f5-45e029741e32/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:12:01,907 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:12:01,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:12:01,908 INFO L82 PathProgramCache]: Analyzing trace with hash 1219247017, now seen corresponding path program 1 times [2021-10-13 07:12:01,909 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:12:01,909 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [71541098] [2021-10-13 07:12:01,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:12:01,909 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:12:01,910 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37a5cc0c-7eaf-4659-a4f5-45e029741e32/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:12:01,911 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37a5cc0c-7eaf-4659-a4f5-45e029741e32/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:12:01,920 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37a5cc0c-7eaf-4659-a4f5-45e029741e32/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-13 07:12:01,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:12:01,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-13 07:12:01,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:12:02,147 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:12:02,147 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:12:02,356 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:12:02,356 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:12:02,356 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [71541098] [2021-10-13 07:12:02,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [71541098] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:12:02,357 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:12:02,357 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-10-13 07:12:02,357 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354731300] [2021-10-13 07:12:02,358 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 07:12:02,358 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:12:02,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 07:12:02,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-13 07:12:02,359 INFO L87 Difference]: Start difference. First operand 31 states and 42 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:12:02,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:12:02,467 INFO L93 Difference]: Finished difference Result 52 states and 69 transitions. [2021-10-13 07:12:02,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 07:12:02,471 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-10-13 07:12:02,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:12:02,472 INFO L225 Difference]: With dead ends: 52 [2021-10-13 07:12:02,472 INFO L226 Difference]: Without dead ends: 28 [2021-10-13 07:12:02,473 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 71.4ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-10-13 07:12:02,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-10-13 07:12:02,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-10-13 07:12:02,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 27 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:12:02,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 35 transitions. [2021-10-13 07:12:02,476 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 35 transitions. Word has length 14 [2021-10-13 07:12:02,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:12:02,477 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 35 transitions. [2021-10-13 07:12:02,477 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:12:02,477 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 35 transitions. [2021-10-13 07:12:02,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-13 07:12:02,477 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:12:02,477 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:12:02,494 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37a5cc0c-7eaf-4659-a4f5-45e029741e32/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-13 07:12:02,693 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37a5cc0c-7eaf-4659-a4f5-45e029741e32/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:12:02,694 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:12:02,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:12:02,694 INFO L82 PathProgramCache]: Analyzing trace with hash 1012446717, now seen corresponding path program 1 times [2021-10-13 07:12:02,695 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:12:02,695 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1653965871] [2021-10-13 07:12:02,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:12:02,695 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:12:02,696 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37a5cc0c-7eaf-4659-a4f5-45e029741e32/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:12:02,699 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37a5cc0c-7eaf-4659-a4f5-45e029741e32/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:12:02,702 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37a5cc0c-7eaf-4659-a4f5-45e029741e32/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-10-13 07:12:02,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:12:02,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-13 07:12:02,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:12:02,897 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:12:02,897 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:12:02,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:12:02,968 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:12:02,968 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1653965871] [2021-10-13 07:12:02,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1653965871] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:12:02,969 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:12:02,969 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-10-13 07:12:02,969 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554126648] [2021-10-13 07:12:02,971 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 07:12:02,971 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:12:02,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 07:12:02,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-13 07:12:02,972 INFO L87 Difference]: Start difference. First operand 28 states and 35 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:12:03,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:12:03,065 INFO L93 Difference]: Finished difference Result 65 states and 76 transitions. [2021-10-13 07:12:03,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-13 07:12:03,066 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-10-13 07:12:03,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:12:03,073 INFO L225 Difference]: With dead ends: 65 [2021-10-13 07:12:03,073 INFO L226 Difference]: Without dead ends: 56 [2021-10-13 07:12:03,074 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 30.8ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-13 07:12:03,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-10-13 07:12:03,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 30. [2021-10-13 07:12:03,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.2758620689655173) internal successors, (37), 29 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:12:03,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2021-10-13 07:12:03,085 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 16 [2021-10-13 07:12:03,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:12:03,085 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2021-10-13 07:12:03,086 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:12:03,087 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2021-10-13 07:12:03,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-13 07:12:03,089 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:12:03,090 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:12:03,114 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37a5cc0c-7eaf-4659-a4f5-45e029741e32/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-10-13 07:12:03,309 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37a5cc0c-7eaf-4659-a4f5-45e029741e32/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:12:03,310 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:12:03,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:12:03,310 INFO L82 PathProgramCache]: Analyzing trace with hash -414082333, now seen corresponding path program 1 times [2021-10-13 07:12:03,311 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:12:03,311 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [108821970] [2021-10-13 07:12:03,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:12:03,311 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:12:03,312 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37a5cc0c-7eaf-4659-a4f5-45e029741e32/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:12:03,313 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37a5cc0c-7eaf-4659-a4f5-45e029741e32/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:12:03,315 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37a5cc0c-7eaf-4659-a4f5-45e029741e32/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-10-13 07:12:03,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:12:03,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-13 07:12:03,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:12:03,586 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:12:03,586 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:12:03,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:12:03,792 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:12:03,792 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [108821970] [2021-10-13 07:12:03,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [108821970] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:12:03,793 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:12:03,793 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-10-13 07:12:03,793 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129519317] [2021-10-13 07:12:03,794 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 07:12:03,794 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:12:03,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 07:12:03,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 07:12:03,795 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:12:03,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:12:03,808 INFO L93 Difference]: Finished difference Result 40 states and 47 transitions. [2021-10-13 07:12:03,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 07:12:03,809 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-10-13 07:12:03,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:12:03,810 INFO L225 Difference]: With dead ends: 40 [2021-10-13 07:12:03,810 INFO L226 Difference]: Without dead ends: 30 [2021-10-13 07:12:03,810 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 35.6ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 07:12:03,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-10-13 07:12:03,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-10-13 07:12:03,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.2413793103448276) internal successors, (36), 29 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:12:03,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2021-10-13 07:12:03,816 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 18 [2021-10-13 07:12:03,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:12:03,816 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2021-10-13 07:12:03,816 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:12:03,817 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2021-10-13 07:12:03,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-13 07:12:03,817 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:12:03,818 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:12:03,831 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37a5cc0c-7eaf-4659-a4f5-45e029741e32/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-10-13 07:12:04,031 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37a5cc0c-7eaf-4659-a4f5-45e029741e32/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:12:04,031 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:12:04,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:12:04,032 INFO L82 PathProgramCache]: Analyzing trace with hash -356824031, now seen corresponding path program 1 times [2021-10-13 07:12:04,032 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:12:04,032 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1287889500] [2021-10-13 07:12:04,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:12:04,033 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:12:04,033 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37a5cc0c-7eaf-4659-a4f5-45e029741e32/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:12:04,034 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37a5cc0c-7eaf-4659-a4f5-45e029741e32/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:12:04,037 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37a5cc0c-7eaf-4659-a4f5-45e029741e32/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-10-13 07:12:04,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:12:04,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 07:12:04,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:12:04,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:12:04,271 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:12:04,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:12:04,379 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:12:04,379 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1287889500] [2021-10-13 07:12:04,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1287889500] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:12:04,380 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:12:04,380 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 9 [2021-10-13 07:12:04,380 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034101108] [2021-10-13 07:12:04,381 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-13 07:12:04,381 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:12:04,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-13 07:12:04,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-10-13 07:12:04,382 INFO L87 Difference]: Start difference. First operand 30 states and 36 transitions. Second operand has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:12:04,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:12:04,487 INFO L93 Difference]: Finished difference Result 42 states and 47 transitions. [2021-10-13 07:12:04,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-13 07:12:04,488 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-10-13 07:12:04,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:12:04,488 INFO L225 Difference]: With dead ends: 42 [2021-10-13 07:12:04,489 INFO L226 Difference]: Without dead ends: 39 [2021-10-13 07:12:04,489 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 107.3ms TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2021-10-13 07:12:04,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-10-13 07:12:04,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 32. [2021-10-13 07:12:04,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.2258064516129032) internal successors, (38), 31 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:12:04,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 38 transitions. [2021-10-13 07:12:04,495 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 38 transitions. Word has length 18 [2021-10-13 07:12:04,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:12:04,495 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 38 transitions. [2021-10-13 07:12:04,495 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:12:04,496 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions. [2021-10-13 07:12:04,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-13 07:12:04,496 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:12:04,497 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:12:04,509 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37a5cc0c-7eaf-4659-a4f5-45e029741e32/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2021-10-13 07:12:04,709 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37a5cc0c-7eaf-4659-a4f5-45e029741e32/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:12:04,710 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:12:04,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:12:04,710 INFO L82 PathProgramCache]: Analyzing trace with hash -208358251, now seen corresponding path program 1 times [2021-10-13 07:12:04,710 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:12:04,711 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [551526676] [2021-10-13 07:12:04,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:12:04,711 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:12:04,712 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37a5cc0c-7eaf-4659-a4f5-45e029741e32/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:12:04,712 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37a5cc0c-7eaf-4659-a4f5-45e029741e32/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:12:04,713 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37a5cc0c-7eaf-4659-a4f5-45e029741e32/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-10-13 07:12:04,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:12:04,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-13 07:12:04,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:12:04,984 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:12:04,984 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:12:05,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:12:05,178 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:12:05,178 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [551526676] [2021-10-13 07:12:05,178 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [551526676] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:12:05,178 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:12:05,178 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-10-13 07:12:05,179 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832910490] [2021-10-13 07:12:05,179 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-13 07:12:05,179 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:12:05,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-13 07:12:05,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-10-13 07:12:05,180 INFO L87 Difference]: Start difference. First operand 32 states and 38 transitions. Second operand has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:12:05,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:12:05,257 INFO L93 Difference]: Finished difference Result 45 states and 50 transitions. [2021-10-13 07:12:05,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 07:12:05,260 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-10-13 07:12:05,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:12:05,260 INFO L225 Difference]: With dead ends: 45 [2021-10-13 07:12:05,261 INFO L226 Difference]: Without dead ends: 27 [2021-10-13 07:12:05,261 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 98.9ms TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-10-13 07:12:05,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-10-13 07:12:05,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-10-13 07:12:05,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.0769230769230769) internal successors, (28), 26 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:12:05,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2021-10-13 07:12:05,266 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 19 [2021-10-13 07:12:05,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:12:05,266 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2021-10-13 07:12:05,267 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:12:05,267 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2021-10-13 07:12:05,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-13 07:12:05,268 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:12:05,268 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:12:05,287 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37a5cc0c-7eaf-4659-a4f5-45e029741e32/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-10-13 07:12:05,484 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37a5cc0c-7eaf-4659-a4f5-45e029741e32/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:12:05,484 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:12:05,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:12:05,485 INFO L82 PathProgramCache]: Analyzing trace with hash -1524231306, now seen corresponding path program 1 times [2021-10-13 07:12:05,485 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:12:05,485 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1458159892] [2021-10-13 07:12:05,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:12:05,485 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:12:05,485 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37a5cc0c-7eaf-4659-a4f5-45e029741e32/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:12:05,486 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37a5cc0c-7eaf-4659-a4f5-45e029741e32/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:12:05,490 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37a5cc0c-7eaf-4659-a4f5-45e029741e32/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-10-13 07:12:05,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 07:12:05,698 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-13 07:12:05,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 07:12:05,849 INFO L133 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2021-10-13 07:12:05,849 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-13 07:12:05,850 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-13 07:12:05,871 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37a5cc0c-7eaf-4659-a4f5-45e029741e32/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-10-13 07:12:06,052 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37a5cc0c-7eaf-4659-a4f5-45e029741e32/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:12:06,057 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-13 07:12:06,098 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 07:12:06 BoogieIcfgContainer [2021-10-13 07:12:06,098 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-13 07:12:06,099 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-13 07:12:06,099 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-13 07:12:06,099 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-13 07:12:06,100 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:12:00" (3/4) ... [2021-10-13 07:12:06,102 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-13 07:12:06,162 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37a5cc0c-7eaf-4659-a4f5-45e029741e32/bin/utaipan-q2qaUkNPG8/witness.graphml [2021-10-13 07:12:06,162 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-13 07:12:06,163 INFO L168 Benchmark]: Toolchain (without parser) took 6471.42 ms. Allocated memory was 71.3 MB in the beginning and 90.2 MB in the end (delta: 18.9 MB). Free memory was 53.0 MB in the beginning and 66.3 MB in the end (delta: -13.3 MB). Peak memory consumption was 4.6 MB. Max. memory is 16.1 GB. [2021-10-13 07:12:06,164 INFO L168 Benchmark]: CDTParser took 0.31 ms. Allocated memory is still 71.3 MB. Free memory was 51.5 MB in the beginning and 51.5 MB in the end (delta: 54.9 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 07:12:06,164 INFO L168 Benchmark]: CACSL2BoogieTranslator took 305.37 ms. Allocated memory is still 71.3 MB. Free memory was 52.8 MB in the beginning and 52.8 MB in the end (delta: 69.5 kB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-13 07:12:06,165 INFO L168 Benchmark]: Boogie Procedure Inliner took 48.74 ms. Allocated memory is still 71.3 MB. Free memory was 52.5 MB in the beginning and 50.7 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 07:12:06,165 INFO L168 Benchmark]: Boogie Preprocessor took 38.47 ms. Allocated memory is still 71.3 MB. Free memory was 50.7 MB in the beginning and 49.1 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 07:12:06,166 INFO L168 Benchmark]: RCFGBuilder took 394.35 ms. Allocated memory is still 71.3 MB. Free memory was 49.1 MB in the beginning and 35.5 MB in the end (delta: 13.6 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-10-13 07:12:06,171 INFO L168 Benchmark]: TraceAbstraction took 5615.66 ms. Allocated memory was 71.3 MB in the beginning and 90.2 MB in the end (delta: 18.9 MB). Free memory was 34.9 MB in the beginning and 69.0 MB in the end (delta: -34.0 MB). Peak memory consumption was 29.0 MB. Max. memory is 16.1 GB. [2021-10-13 07:12:06,171 INFO L168 Benchmark]: Witness Printer took 62.90 ms. Allocated memory is still 90.2 MB. Free memory was 69.0 MB in the beginning and 66.3 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 07:12:06,175 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31 ms. Allocated memory is still 71.3 MB. Free memory was 51.5 MB in the beginning and 51.5 MB in the end (delta: 54.9 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 305.37 ms. Allocated memory is still 71.3 MB. Free memory was 52.8 MB in the beginning and 52.8 MB in the end (delta: 69.5 kB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 48.74 ms. Allocated memory is still 71.3 MB. Free memory was 52.5 MB in the beginning and 50.7 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 38.47 ms. Allocated memory is still 71.3 MB. Free memory was 50.7 MB in the beginning and 49.1 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 394.35 ms. Allocated memory is still 71.3 MB. Free memory was 49.1 MB in the beginning and 35.5 MB in the end (delta: 13.6 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 5615.66 ms. Allocated memory was 71.3 MB in the beginning and 90.2 MB in the end (delta: 18.9 MB). Free memory was 34.9 MB in the beginning and 69.0 MB in the end (delta: -34.0 MB). Peak memory consumption was 29.0 MB. Max. memory is 16.1 GB. * Witness Printer took 62.90 ms. Allocated memory is still 90.2 MB. Free memory was 69.0 MB in the beginning and 66.3 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 82]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L76] double x = -0.0; [L77] double y = 0.0; [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. OverallTime: 5461.9ms, OverallIterations: 8, TraceHistogramMax: 1, EmptinessCheckTime: 17.5ms, AutomataDifference: 614.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 10.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 234 SDtfs, 249 SDslu, 387 SDs, 0 SdLazy, 128 SolverSat, 20 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 273.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 209 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 380.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=32occurred in iteration=0, InterpolantAutomatonStates: 33, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 63.9ms AutomataMinimizationTime, 7 MinimizatonAttempts, 61 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 102.7ms SsaConstructionTime, 417.2ms SatisfiabilityAnalysisTime, 1773.4ms InterpolantComputationTime, 128 NumberOfCodeBlocks, 128 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 198 ConstructedInterpolants, 15 QuantifiedInterpolants, 666 SizeOfPredicates, 27 NumberOfNonLiveVariables, 423 ConjunctsInSsa, 40 ConjunctsInUnsatCore, 14 InterpolantComputations, 14 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! [2021-10-13 07:12:06,225 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37a5cc0c-7eaf-4659-a4f5-45e029741e32/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...