./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/float-newlib/float_req_bl_1232b.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b2eff8ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_305e363d-3a36-4718-9e7b-f7b7deb81765/bin/utaipan-SDwSMHVbGG/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_305e363d-3a36-4718-9e7b-f7b7deb81765/bin/utaipan-SDwSMHVbGG/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_305e363d-3a36-4718-9e7b-f7b7deb81765/bin/utaipan-SDwSMHVbGG/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_305e363d-3a36-4718-9e7b-f7b7deb81765/bin/utaipan-SDwSMHVbGG/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-newlib/float_req_bl_1232b.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_305e363d-3a36-4718-9e7b-f7b7deb81765/bin/utaipan-SDwSMHVbGG/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_305e363d-3a36-4718-9e7b-f7b7deb81765/bin/utaipan-SDwSMHVbGG --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 6764d5c0204d5929259e99bbe2407d8f2018e402cda704b63da836202ebf4e68 ........................................................................................................................................................................................................................................................................................................... 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_305e363d-3a36-4718-9e7b-f7b7deb81765/bin/utaipan-SDwSMHVbGG/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_305e363d-3a36-4718-9e7b-f7b7deb81765/bin/utaipan-SDwSMHVbGG/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_305e363d-3a36-4718-9e7b-f7b7deb81765/bin/utaipan-SDwSMHVbGG/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_305e363d-3a36-4718-9e7b-f7b7deb81765/bin/utaipan-SDwSMHVbGG/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-newlib/float_req_bl_1232b.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_305e363d-3a36-4718-9e7b-f7b7deb81765/bin/utaipan-SDwSMHVbGG/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_305e363d-3a36-4718-9e7b-f7b7deb81765/bin/utaipan-SDwSMHVbGG --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 6764d5c0204d5929259e99bbe2407d8f2018e402cda704b63da836202ebf4e68 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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-b2eff8b [2021-10-29 04:41:16,744 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-29 04:41:16,748 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-29 04:41:16,812 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-29 04:41:16,813 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-29 04:41:16,815 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-29 04:41:16,816 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-29 04:41:16,819 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-29 04:41:16,821 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-29 04:41:16,823 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-29 04:41:16,824 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-29 04:41:16,826 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-29 04:41:16,826 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-29 04:41:16,828 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-29 04:41:16,830 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-29 04:41:16,832 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-29 04:41:16,833 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-29 04:41:16,834 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-29 04:41:16,837 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-29 04:41:16,840 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-29 04:41:16,843 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-29 04:41:16,845 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-29 04:41:16,846 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-29 04:41:16,848 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-29 04:41:16,852 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-29 04:41:16,853 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-29 04:41:16,853 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-29 04:41:16,855 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-29 04:41:16,855 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-29 04:41:16,857 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-29 04:41:16,857 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-29 04:41:16,858 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-29 04:41:16,859 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-29 04:41:16,860 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-29 04:41:16,862 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-29 04:41:16,862 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-29 04:41:16,863 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-29 04:41:16,864 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-29 04:41:16,864 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-29 04:41:16,865 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-29 04:41:16,867 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-29 04:41:16,868 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_305e363d-3a36-4718-9e7b-f7b7deb81765/bin/utaipan-SDwSMHVbGG/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-29 04:41:16,896 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-29 04:41:16,897 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-29 04:41:16,898 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-29 04:41:16,898 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-29 04:41:16,898 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-29 04:41:16,899 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-29 04:41:16,899 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-29 04:41:16,899 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-29 04:41:16,900 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-29 04:41:16,900 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-29 04:41:16,900 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-29 04:41:16,901 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-29 04:41:16,901 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-29 04:41:16,901 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-29 04:41:16,902 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-29 04:41:16,902 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-29 04:41:16,903 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-29 04:41:16,903 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-29 04:41:16,903 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-29 04:41:16,903 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-29 04:41:16,904 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-29 04:41:16,904 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-29 04:41:16,904 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-29 04:41:16,905 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-29 04:41:16,905 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-29 04:41:16,905 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-29 04:41:16,906 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-29 04:41:16,906 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-29 04:41:16,906 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-29 04:41:16,907 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-29 04:41:16,907 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-29 04:41:16,907 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-29 04:41:16,907 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-29 04:41:16,908 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-29 04:41:16,908 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-29 04:41:16,908 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-29 04:41:16,908 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-29 04:41:16,909 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-29 04:41:16,909 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-29 04:41:16,909 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_305e363d-3a36-4718-9e7b-f7b7deb81765/bin/utaipan-SDwSMHVbGG/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_305e363d-3a36-4718-9e7b-f7b7deb81765/bin/utaipan-SDwSMHVbGG Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6764d5c0204d5929259e99bbe2407d8f2018e402cda704b63da836202ebf4e68 [2021-10-29 04:41:17,196 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-29 04:41:17,233 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-29 04:41:17,236 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-29 04:41:17,238 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-29 04:41:17,239 INFO L275 PluginConnector]: CDTParser initialized [2021-10-29 04:41:17,239 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_305e363d-3a36-4718-9e7b-f7b7deb81765/bin/utaipan-SDwSMHVbGG/../../sv-benchmarks/c/float-newlib/float_req_bl_1232b.c [2021-10-29 04:41:17,308 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_305e363d-3a36-4718-9e7b-f7b7deb81765/bin/utaipan-SDwSMHVbGG/data/4790c01ef/1a983f934840415ca05e5e9ba907f15b/FLAGa6b06b75c [2021-10-29 04:41:17,773 INFO L306 CDTParser]: Found 1 translation units. [2021-10-29 04:41:17,774 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_305e363d-3a36-4718-9e7b-f7b7deb81765/sv-benchmarks/c/float-newlib/float_req_bl_1232b.c [2021-10-29 04:41:17,789 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_305e363d-3a36-4718-9e7b-f7b7deb81765/bin/utaipan-SDwSMHVbGG/data/4790c01ef/1a983f934840415ca05e5e9ba907f15b/FLAGa6b06b75c [2021-10-29 04:41:18,147 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_305e363d-3a36-4718-9e7b-f7b7deb81765/bin/utaipan-SDwSMHVbGG/data/4790c01ef/1a983f934840415ca05e5e9ba907f15b [2021-10-29 04:41:18,150 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-29 04:41:18,151 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-29 04:41:18,153 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-29 04:41:18,154 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-29 04:41:18,157 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-29 04:41:18,158 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 04:41:18" (1/1) ... [2021-10-29 04:41:18,160 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@59d0795c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 04:41:18, skipping insertion in model container [2021-10-29 04:41:18,160 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 04:41:18" (1/1) ... [2021-10-29 04:41:18,169 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-29 04:41:18,188 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-29 04:41:18,385 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_305e363d-3a36-4718-9e7b-f7b7deb81765/sv-benchmarks/c/float-newlib/float_req_bl_1232b.c[1657,1670] [2021-10-29 04:41:18,389 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-29 04:41:18,398 INFO L203 MainTranslator]: Completed pre-run [2021-10-29 04:41:18,421 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_305e363d-3a36-4718-9e7b-f7b7deb81765/sv-benchmarks/c/float-newlib/float_req_bl_1232b.c[1657,1670] [2021-10-29 04:41:18,422 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-29 04:41:18,435 INFO L208 MainTranslator]: Completed translation [2021-10-29 04:41:18,435 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 04:41:18 WrapperNode [2021-10-29 04:41:18,436 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-29 04:41:18,437 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-29 04:41:18,437 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-29 04:41:18,437 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-29 04:41:18,445 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 04:41:18" (1/1) ... [2021-10-29 04:41:18,454 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 04:41:18" (1/1) ... [2021-10-29 04:41:18,480 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-29 04:41:18,481 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-29 04:41:18,482 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-29 04:41:18,482 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-29 04:41:18,491 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 04:41:18" (1/1) ... [2021-10-29 04:41:18,492 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 04:41:18" (1/1) ... [2021-10-29 04:41:18,495 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 04:41:18" (1/1) ... [2021-10-29 04:41:18,495 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 04:41:18" (1/1) ... [2021-10-29 04:41:18,504 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 04:41:18" (1/1) ... [2021-10-29 04:41:18,510 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 04:41:18" (1/1) ... [2021-10-29 04:41:18,512 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 04:41:18" (1/1) ... [2021-10-29 04:41:18,515 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-29 04:41:18,516 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-29 04:41:18,516 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-29 04:41:18,516 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-29 04:41:18,518 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 04:41:18" (1/1) ... [2021-10-29 04:41:18,538 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-29 04:41:18,552 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_305e363d-3a36-4718-9e7b-f7b7deb81765/bin/utaipan-SDwSMHVbGG/z3 [2021-10-29 04:41:18,563 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_305e363d-3a36-4718-9e7b-f7b7deb81765/bin/utaipan-SDwSMHVbGG/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-29 04:41:18,568 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_305e363d-3a36-4718-9e7b-f7b7deb81765/bin/utaipan-SDwSMHVbGG/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-29 04:41:18,602 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-29 04:41:18,603 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-29 04:41:18,603 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2021-10-29 04:41:18,603 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-29 04:41:18,603 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-29 04:41:18,603 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-29 04:41:18,604 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-29 04:41:19,254 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-29 04:41:19,254 INFO L299 CfgBuilder]: Removed 18 assume(true) statements. [2021-10-29 04:41:19,257 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 04:41:19 BoogieIcfgContainer [2021-10-29 04:41:19,257 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-29 04:41:19,259 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-29 04:41:19,259 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-29 04:41:19,263 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-29 04:41:19,263 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 04:41:18" (1/3) ... [2021-10-29 04:41:19,264 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@422ee4fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 04:41:19, skipping insertion in model container [2021-10-29 04:41:19,265 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 04:41:18" (2/3) ... [2021-10-29 04:41:19,265 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@422ee4fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 04:41:19, skipping insertion in model container [2021-10-29 04:41:19,265 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 04:41:19" (3/3) ... [2021-10-29 04:41:19,267 INFO L111 eAbstractionObserver]: Analyzing ICFG float_req_bl_1232b.c [2021-10-29 04:41:19,272 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-29 04:41:19,272 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-29 04:41:19,322 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-29 04:41:19,330 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-29 04:41:19,330 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-29 04:41:19,345 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) [2021-10-29 04:41:19,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-29 04:41:19,350 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 04:41:19,351 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 04:41:19,352 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 04:41:19,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 04:41:19,358 INFO L85 PathProgramCache]: Analyzing trace with hash 1375961059, now seen corresponding path program 1 times [2021-10-29 04:41:19,388 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 04:41:19,389 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808817108] [2021-10-29 04:41:19,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 04:41:19,390 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 04:41:19,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 04:41:19,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 04:41:19,589 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 04:41:19,590 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808817108] [2021-10-29 04:41:19,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808817108] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-29 04:41:19,592 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-29 04:41:19,592 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-29 04:41:19,594 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631653974] [2021-10-29 04:41:19,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-29 04:41:19,600 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 04:41:19,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-29 04:41:19,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-29 04:41:19,623 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) [2021-10-29 04:41:19,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 04:41:19,645 INFO L93 Difference]: Finished difference Result 35 states and 51 transitions. [2021-10-29 04:41:19,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-29 04:41:19,646 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 [2021-10-29 04:41:19,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 04:41:19,658 INFO L225 Difference]: With dead ends: 35 [2021-10-29 04:41:19,659 INFO L226 Difference]: Without dead ends: 16 [2021-10-29 04:41:19,662 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-29 04:41:19,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-10-29 04:41:19,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-10-29 04:41:19,696 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) [2021-10-29 04:41:19,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2021-10-29 04:41:19,699 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 8 [2021-10-29 04:41:19,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 04:41:19,700 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2021-10-29 04:41:19,700 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) [2021-10-29 04:41:19,701 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2021-10-29 04:41:19,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-29 04:41:19,702 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 04:41:19,702 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 04:41:19,702 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-29 04:41:19,703 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 04:41:19,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 04:41:19,706 INFO L85 PathProgramCache]: Analyzing trace with hash 2106007434, now seen corresponding path program 1 times [2021-10-29 04:41:19,707 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 04:41:19,707 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845239147] [2021-10-29 04:41:19,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 04:41:19,708 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 04:41:19,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-29 04:41:19,815 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-29 04:41:19,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-29 04:41:19,895 INFO L133 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-10-29 04:41:19,895 INFO L627 BasicCegarLoop]: Counterexample is feasible [2021-10-29 04:41:19,898 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-29 04:41:19,900 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-29 04:41:19,904 INFO L731 BasicCegarLoop]: Path program histogram: [1, 1] [2021-10-29 04:41:19,908 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-29 04:41:19,941 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.10 04:41:19 BoogieIcfgContainer [2021-10-29 04:41:19,941 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-29 04:41:19,943 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-29 04:41:19,943 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-29 04:41:19,944 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-29 04:41:19,945 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 04:41:19" (3/4) ... [2021-10-29 04:41:19,949 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-29 04:41:19,949 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-29 04:41:19,952 INFO L168 Benchmark]: Toolchain (without parser) took 1799.07 ms. Allocated memory was 92.3 MB in the beginning and 113.2 MB in the end (delta: 21.0 MB). Free memory was 60.1 MB in the beginning and 72.2 MB in the end (delta: -12.1 MB). Peak memory consumption was 10.2 MB. Max. memory is 16.1 GB. [2021-10-29 04:41:19,954 INFO L168 Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 92.3 MB. Free memory was 47.9 MB in the beginning and 47.8 MB in the end (delta: 37.9 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-29 04:41:19,956 INFO L168 Benchmark]: CACSL2BoogieTranslator took 282.65 ms. Allocated memory is still 92.3 MB. Free memory was 59.9 MB in the beginning and 69.1 MB in the end (delta: -9.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-29 04:41:19,958 INFO L168 Benchmark]: Boogie Procedure Inliner took 43.76 ms. Allocated memory is still 92.3 MB. Free memory was 68.7 MB in the beginning and 67.2 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-29 04:41:19,964 INFO L168 Benchmark]: Boogie Preprocessor took 33.98 ms. Allocated memory is still 92.3 MB. Free memory was 67.2 MB in the beginning and 65.8 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-29 04:41:19,966 INFO L168 Benchmark]: RCFGBuilder took 741.49 ms. Allocated memory is still 92.3 MB. Free memory was 65.5 MB in the beginning and 43.2 MB in the end (delta: 22.3 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.1 GB. [2021-10-29 04:41:19,967 INFO L168 Benchmark]: TraceAbstraction took 682.40 ms. Allocated memory was 92.3 MB in the beginning and 113.2 MB in the end (delta: 21.0 MB). Free memory was 42.8 MB in the beginning and 72.7 MB in the end (delta: -29.9 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-29 04:41:19,968 INFO L168 Benchmark]: Witness Printer took 6.74 ms. Allocated memory is still 113.2 MB. Free memory was 72.7 MB in the beginning and 72.2 MB in the end (delta: 543.2 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-29 04:41:19,977 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 ms. Allocated memory is still 92.3 MB. Free memory was 47.9 MB in the beginning and 47.8 MB in the end (delta: 37.9 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 282.65 ms. Allocated memory is still 92.3 MB. Free memory was 59.9 MB in the beginning and 69.1 MB in the end (delta: -9.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 43.76 ms. Allocated memory is still 92.3 MB. Free memory was 68.7 MB in the beginning and 67.2 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 33.98 ms. Allocated memory is still 92.3 MB. Free memory was 67.2 MB in the beginning and 65.8 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 741.49 ms. Allocated memory is still 92.3 MB. Free memory was 65.5 MB in the beginning and 43.2 MB in the end (delta: 22.3 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.1 GB. * TraceAbstraction took 682.40 ms. Allocated memory was 92.3 MB in the beginning and 113.2 MB in the end (delta: 21.0 MB). Free memory was 42.8 MB in the beginning and 72.7 MB in the end (delta: -29.9 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 6.74 ms. Allocated memory is still 113.2 MB. Free memory was 72.7 MB in the beginning and 72.2 MB in the end (delta: 543.2 kB). 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, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 72]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 71, overapproximation of someUnaryFLOAToperation at line 66. Possible FailurePath: [L66] float x = -0.0f; [L67] float y = 0.0f; [L15] __uint32_t w; [L18] ieee_float_shape_type gf_u; [L19] gf_u.value = (x) [L20] EXPR gf_u.word [L20] (w) = gf_u.word [L23] COND FALSE !(w == 0x00000000 || w == 0x80000000) [L25-L26] COND FALSE !((w >= 0x00800000 && w <= 0x7f7fffff) || (w >= 0x80800000 && w <= 0xff7fffff)) [L28-L29] COND FALSE !((w >= 0x00000001 && w <= 0x007fffff) || (w >= 0x80000001 && w <= 0x807fffff)) [L31] COND FALSE !(w == 0x7f800000 || w == 0xff800000) [L34] return 0; [L38] COND TRUE __fpclassify_float(x) == 0 [L39] return y; [L68] float res = fmin_float(x, y); [L71] EXPR res == -0.0f && __signbit_float(res) == 1 [L71] COND TRUE !(res == -0.0f && __signbit_float(res) == 1) [L72] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 18 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 0.5s, OverallIterations: 2, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 19 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=18occurred in iteration=0, InterpolantAutomatonStates: 2, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 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 [2021-10-29 04:41:20,043 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_305e363d-3a36-4718-9e7b-f7b7deb81765/bin/utaipan-SDwSMHVbGG/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.1-dev-b2eff8b [2021-10-29 04:41:22,671 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-29 04:41:22,673 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-29 04:41:22,716 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-29 04:41:22,717 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-29 04:41:22,718 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-29 04:41:22,720 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-29 04:41:22,723 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-29 04:41:22,726 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-29 04:41:22,728 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-29 04:41:22,729 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-29 04:41:22,731 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-29 04:41:22,732 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-29 04:41:22,734 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-29 04:41:22,737 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-29 04:41:22,739 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-29 04:41:22,740 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-29 04:41:22,741 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-29 04:41:22,744 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-29 04:41:22,747 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-29 04:41:22,752 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-29 04:41:22,758 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-29 04:41:22,761 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-29 04:41:22,765 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-29 04:41:22,778 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-29 04:41:22,781 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-29 04:41:22,781 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-29 04:41:22,785 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-29 04:41:22,787 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-29 04:41:22,789 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-29 04:41:22,790 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-29 04:41:22,791 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-29 04:41:22,793 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-29 04:41:22,795 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-29 04:41:22,796 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-29 04:41:22,797 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-29 04:41:22,799 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-29 04:41:22,799 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-29 04:41:22,800 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-29 04:41:22,802 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-29 04:41:22,803 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-29 04:41:22,809 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_305e363d-3a36-4718-9e7b-f7b7deb81765/bin/utaipan-SDwSMHVbGG/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-10-29 04:41:22,860 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-29 04:41:22,862 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-29 04:41:22,864 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-29 04:41:22,864 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-29 04:41:22,865 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-29 04:41:22,865 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-29 04:41:22,865 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-29 04:41:22,865 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-29 04:41:22,865 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-29 04:41:22,867 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-29 04:41:22,869 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-29 04:41:22,869 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-29 04:41:22,869 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-29 04:41:22,869 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-29 04:41:22,870 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-29 04:41:22,870 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-29 04:41:22,870 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-29 04:41:22,870 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-29 04:41:22,871 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-29 04:41:22,871 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-29 04:41:22,871 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-29 04:41:22,871 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-29 04:41:22,872 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-29 04:41:22,872 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-29 04:41:22,872 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-29 04:41:22,872 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-29 04:41:22,873 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-29 04:41:22,873 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-29 04:41:22,873 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-29 04:41:22,874 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-29 04:41:22,874 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-10-29 04:41:22,874 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-29 04:41:22,875 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-29 04:41:22,875 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-29 04:41:22,876 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-29 04:41:22,876 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_305e363d-3a36-4718-9e7b-f7b7deb81765/bin/utaipan-SDwSMHVbGG/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_305e363d-3a36-4718-9e7b-f7b7deb81765/bin/utaipan-SDwSMHVbGG Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6764d5c0204d5929259e99bbe2407d8f2018e402cda704b63da836202ebf4e68 [2021-10-29 04:41:23,304 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-29 04:41:23,335 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-29 04:41:23,339 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-29 04:41:23,341 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-29 04:41:23,341 INFO L275 PluginConnector]: CDTParser initialized [2021-10-29 04:41:23,345 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_305e363d-3a36-4718-9e7b-f7b7deb81765/bin/utaipan-SDwSMHVbGG/../../sv-benchmarks/c/float-newlib/float_req_bl_1232b.c [2021-10-29 04:41:23,439 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_305e363d-3a36-4718-9e7b-f7b7deb81765/bin/utaipan-SDwSMHVbGG/data/7e37a2337/e77b38e488a943f1a77b47895b6dd217/FLAGa732469b1 [2021-10-29 04:41:24,028 INFO L306 CDTParser]: Found 1 translation units. [2021-10-29 04:41:24,028 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_305e363d-3a36-4718-9e7b-f7b7deb81765/sv-benchmarks/c/float-newlib/float_req_bl_1232b.c [2021-10-29 04:41:24,045 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_305e363d-3a36-4718-9e7b-f7b7deb81765/bin/utaipan-SDwSMHVbGG/data/7e37a2337/e77b38e488a943f1a77b47895b6dd217/FLAGa732469b1 [2021-10-29 04:41:24,356 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_305e363d-3a36-4718-9e7b-f7b7deb81765/bin/utaipan-SDwSMHVbGG/data/7e37a2337/e77b38e488a943f1a77b47895b6dd217 [2021-10-29 04:41:24,359 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-29 04:41:24,361 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-29 04:41:24,362 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-29 04:41:24,363 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-29 04:41:24,367 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-29 04:41:24,368 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 04:41:24" (1/1) ... [2021-10-29 04:41:24,370 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5db2cb36 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 04:41:24, skipping insertion in model container [2021-10-29 04:41:24,370 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 04:41:24" (1/1) ... [2021-10-29 04:41:24,379 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-29 04:41:24,399 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-29 04:41:24,564 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_305e363d-3a36-4718-9e7b-f7b7deb81765/sv-benchmarks/c/float-newlib/float_req_bl_1232b.c[1657,1670] [2021-10-29 04:41:24,567 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-29 04:41:24,586 INFO L203 MainTranslator]: Completed pre-run [2021-10-29 04:41:24,629 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_305e363d-3a36-4718-9e7b-f7b7deb81765/sv-benchmarks/c/float-newlib/float_req_bl_1232b.c[1657,1670] [2021-10-29 04:41:24,631 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-29 04:41:24,649 INFO L208 MainTranslator]: Completed translation [2021-10-29 04:41:24,650 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 04:41:24 WrapperNode [2021-10-29 04:41:24,650 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-29 04:41:24,651 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-29 04:41:24,652 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-29 04:41:24,652 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-29 04:41:24,660 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 04:41:24" (1/1) ... [2021-10-29 04:41:24,671 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 04:41:24" (1/1) ... [2021-10-29 04:41:24,703 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-29 04:41:24,704 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-29 04:41:24,704 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-29 04:41:24,705 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-29 04:41:24,715 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 04:41:24" (1/1) ... [2021-10-29 04:41:24,715 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 04:41:24" (1/1) ... [2021-10-29 04:41:24,721 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 04:41:24" (1/1) ... [2021-10-29 04:41:24,721 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 04:41:24" (1/1) ... [2021-10-29 04:41:24,731 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 04:41:24" (1/1) ... [2021-10-29 04:41:24,736 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 04:41:24" (1/1) ... [2021-10-29 04:41:24,739 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 04:41:24" (1/1) ... [2021-10-29 04:41:24,743 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-29 04:41:24,744 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-29 04:41:24,744 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-29 04:41:24,745 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-29 04:41:24,745 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 04:41:24" (1/1) ... [2021-10-29 04:41:24,755 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-29 04:41:24,769 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_305e363d-3a36-4718-9e7b-f7b7deb81765/bin/utaipan-SDwSMHVbGG/z3 [2021-10-29 04:41:24,783 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_305e363d-3a36-4718-9e7b-f7b7deb81765/bin/utaipan-SDwSMHVbGG/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-29 04:41:24,786 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_305e363d-3a36-4718-9e7b-f7b7deb81765/bin/utaipan-SDwSMHVbGG/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-29 04:41:24,825 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-29 04:41:24,826 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-29 04:41:24,826 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-10-29 04:41:24,826 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-29 04:41:24,827 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-29 04:41:24,827 INFO L130 BoogieDeclarations]: Found specification of procedure write~intFLOATTYPE4 [2021-10-29 04:41:24,829 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-29 04:41:25,282 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-29 04:41:25,282 INFO L299 CfgBuilder]: Removed 18 assume(true) statements. [2021-10-29 04:41:25,284 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 04:41:25 BoogieIcfgContainer [2021-10-29 04:41:25,285 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-29 04:41:25,287 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-29 04:41:25,287 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-29 04:41:25,290 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-29 04:41:25,291 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 04:41:24" (1/3) ... [2021-10-29 04:41:25,292 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3cb81ad7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 04:41:25, skipping insertion in model container [2021-10-29 04:41:25,292 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 04:41:24" (2/3) ... [2021-10-29 04:41:25,293 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3cb81ad7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 04:41:25, skipping insertion in model container [2021-10-29 04:41:25,293 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 04:41:25" (3/3) ... [2021-10-29 04:41:25,299 INFO L111 eAbstractionObserver]: Analyzing ICFG float_req_bl_1232b.c [2021-10-29 04:41:25,305 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-29 04:41:25,321 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-29 04:41:25,411 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-29 04:41:25,425 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-29 04:41:25,425 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-29 04:41:25,446 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) [2021-10-29 04:41:25,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-29 04:41:25,452 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 04:41:25,453 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 04:41:25,454 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 04:41:25,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 04:41:25,468 INFO L85 PathProgramCache]: Analyzing trace with hash -958075201, now seen corresponding path program 1 times [2021-10-29 04:41:25,483 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-29 04:41:25,484 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [755926090] [2021-10-29 04:41:25,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 04:41:25,485 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-29 04:41:25,485 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_305e363d-3a36-4718-9e7b-f7b7deb81765/bin/utaipan-SDwSMHVbGG/mathsat [2021-10-29 04:41:25,489 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_305e363d-3a36-4718-9e7b-f7b7deb81765/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-29 04:41:25,513 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_305e363d-3a36-4718-9e7b-f7b7deb81765/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-29 04:41:25,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 04:41:25,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 1 conjunts are in the unsatisfiable core [2021-10-29 04:41:25,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 04:41:25,694 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 04:41:25,695 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-29 04:41:25,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 04:41:25,756 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-29 04:41:25,757 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [755926090] [2021-10-29 04:41:25,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [755926090] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-29 04:41:25,758 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-29 04:41:25,758 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-29 04:41:25,760 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407673319] [2021-10-29 04:41:25,767 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-29 04:41:25,768 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-29 04:41:25,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-29 04:41:25,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-29 04:41:25,795 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) [2021-10-29 04:41:25,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 04:41:25,823 INFO L93 Difference]: Finished difference Result 62 states and 98 transitions. [2021-10-29 04:41:25,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-29 04:41:25,826 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 [2021-10-29 04:41:25,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 04:41:25,836 INFO L225 Difference]: With dead ends: 62 [2021-10-29 04:41:25,837 INFO L226 Difference]: Without dead ends: 29 [2021-10-29 04:41:25,840 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-29 04:41:25,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-10-29 04:41:25,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-10-29 04:41:25,899 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) [2021-10-29 04:41:25,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 40 transitions. [2021-10-29 04:41:25,903 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 40 transitions. Word has length 10 [2021-10-29 04:41:25,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 04:41:25,904 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 40 transitions. [2021-10-29 04:41:25,904 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) [2021-10-29 04:41:25,905 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 40 transitions. [2021-10-29 04:41:25,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-29 04:41:25,906 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 04:41:25,906 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 04:41:25,925 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_305e363d-3a36-4718-9e7b-f7b7deb81765/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-29 04:41:26,122 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_305e363d-3a36-4718-9e7b-f7b7deb81765/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 [2021-10-29 04:41:26,122 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 04:41:26,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 04:41:26,124 INFO L85 PathProgramCache]: Analyzing trace with hash 1001584898, now seen corresponding path program 1 times [2021-10-29 04:41:26,124 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-29 04:41:26,124 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1517289321] [2021-10-29 04:41:26,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 04:41:26,125 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-29 04:41:26,125 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_305e363d-3a36-4718-9e7b-f7b7deb81765/bin/utaipan-SDwSMHVbGG/mathsat [2021-10-29 04:41:26,126 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_305e363d-3a36-4718-9e7b-f7b7deb81765/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-29 04:41:26,137 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_305e363d-3a36-4718-9e7b-f7b7deb81765/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-29 04:41:26,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 04:41:26,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-29 04:41:26,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 04:41:26,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 04:41:26,272 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-29 04:41:26,317 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 04:41:26,318 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-29 04:41:26,318 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1517289321] [2021-10-29 04:41:26,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1517289321] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-29 04:41:26,318 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-29 04:41:26,319 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-10-29 04:41:26,319 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661394357] [2021-10-29 04:41:26,320 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-29 04:41:26,321 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-29 04:41:26,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-29 04:41:26,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-29 04:41:26,323 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) [2021-10-29 04:41:26,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 04:41:26,403 INFO L93 Difference]: Finished difference Result 68 states and 85 transitions. [2021-10-29 04:41:26,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-29 04:41:26,404 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 [2021-10-29 04:41:26,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 04:41:26,405 INFO L225 Difference]: With dead ends: 68 [2021-10-29 04:41:26,406 INFO L226 Difference]: Without dead ends: 59 [2021-10-29 04:41:26,407 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-29 04:41:26,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-10-29 04:41:26,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 31. [2021-10-29 04:41:26,413 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) [2021-10-29 04:41:26,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2021-10-29 04:41:26,414 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 11 [2021-10-29 04:41:26,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 04:41:26,415 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2021-10-29 04:41:26,415 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) [2021-10-29 04:41:26,416 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2021-10-29 04:41:26,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-29 04:41:26,416 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 04:41:26,417 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 04:41:26,435 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_305e363d-3a36-4718-9e7b-f7b7deb81765/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-29 04:41:26,635 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_305e363d-3a36-4718-9e7b-f7b7deb81765/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 [2021-10-29 04:41:26,635 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 04:41:26,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 04:41:26,636 INFO L85 PathProgramCache]: Analyzing trace with hash 1219247017, now seen corresponding path program 1 times [2021-10-29 04:41:26,637 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-29 04:41:26,637 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1725759258] [2021-10-29 04:41:26,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 04:41:26,637 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-29 04:41:26,638 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_305e363d-3a36-4718-9e7b-f7b7deb81765/bin/utaipan-SDwSMHVbGG/mathsat [2021-10-29 04:41:26,638 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_305e363d-3a36-4718-9e7b-f7b7deb81765/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-29 04:41:26,651 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_305e363d-3a36-4718-9e7b-f7b7deb81765/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-29 04:41:26,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 04:41:26,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-29 04:41:26,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 04:41:26,925 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 04:41:26,925 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-29 04:41:27,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 04:41:27,049 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-29 04:41:27,049 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1725759258] [2021-10-29 04:41:27,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1725759258] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-29 04:41:27,050 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-29 04:41:27,050 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-10-29 04:41:27,050 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822008982] [2021-10-29 04:41:27,051 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-29 04:41:27,051 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-29 04:41:27,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-29 04:41:27,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-29 04:41:27,052 INFO L87 Difference]: Start difference. First operand 31 states and 42 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 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) [2021-10-29 04:41:27,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 04:41:27,107 INFO L93 Difference]: Finished difference Result 52 states and 69 transitions. [2021-10-29 04:41:27,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-29 04:41:27,108 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 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 14 [2021-10-29 04:41:27,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 04:41:27,108 INFO L225 Difference]: With dead ends: 52 [2021-10-29 04:41:27,109 INFO L226 Difference]: Without dead ends: 26 [2021-10-29 04:41:27,109 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-29 04:41:27,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-10-29 04:41:27,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-10-29 04:41:27,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.28) internal successors, (32), 25 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) [2021-10-29 04:41:27,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2021-10-29 04:41:27,114 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 14 [2021-10-29 04:41:27,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 04:41:27,114 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2021-10-29 04:41:27,114 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 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) [2021-10-29 04:41:27,115 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2021-10-29 04:41:27,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-29 04:41:27,115 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 04:41:27,116 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 04:41:27,132 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_305e363d-3a36-4718-9e7b-f7b7deb81765/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-29 04:41:27,328 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_305e363d-3a36-4718-9e7b-f7b7deb81765/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 [2021-10-29 04:41:27,329 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 04:41:27,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 04:41:27,330 INFO L85 PathProgramCache]: Analyzing trace with hash 1012446717, now seen corresponding path program 1 times [2021-10-29 04:41:27,330 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-29 04:41:27,331 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1838653987] [2021-10-29 04:41:27,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 04:41:27,331 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-29 04:41:27,331 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_305e363d-3a36-4718-9e7b-f7b7deb81765/bin/utaipan-SDwSMHVbGG/mathsat [2021-10-29 04:41:27,332 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_305e363d-3a36-4718-9e7b-f7b7deb81765/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-29 04:41:27,335 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_305e363d-3a36-4718-9e7b-f7b7deb81765/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-10-29 04:41:27,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 04:41:27,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-29 04:41:27,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 04:41:27,468 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 04:41:27,468 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-29 04:41:27,521 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 04:41:27,522 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-29 04:41:27,522 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1838653987] [2021-10-29 04:41:27,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1838653987] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-29 04:41:27,523 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-29 04:41:27,523 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-10-29 04:41:27,523 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218386136] [2021-10-29 04:41:27,524 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-29 04:41:27,524 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-29 04:41:27,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-29 04:41:27,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-29 04:41:27,525 INFO L87 Difference]: Start difference. First operand 26 states and 32 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) [2021-10-29 04:41:27,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 04:41:27,578 INFO L93 Difference]: Finished difference Result 61 states and 71 transitions. [2021-10-29 04:41:27,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-29 04:41:27,579 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 [2021-10-29 04:41:27,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 04:41:27,580 INFO L225 Difference]: With dead ends: 61 [2021-10-29 04:41:27,580 INFO L226 Difference]: Without dead ends: 52 [2021-10-29 04:41:27,581 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-29 04:41:27,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-10-29 04:41:27,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 28. [2021-10-29 04:41:27,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 27 states have internal predecessors, (34), 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) [2021-10-29 04:41:27,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2021-10-29 04:41:27,586 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 16 [2021-10-29 04:41:27,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 04:41:27,587 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2021-10-29 04:41:27,587 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) [2021-10-29 04:41:27,587 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2021-10-29 04:41:27,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-29 04:41:27,588 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 04:41:27,588 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 04:41:27,608 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_305e363d-3a36-4718-9e7b-f7b7deb81765/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-10-29 04:41:27,801 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_305e363d-3a36-4718-9e7b-f7b7deb81765/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 [2021-10-29 04:41:27,802 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 04:41:27,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 04:41:27,802 INFO L85 PathProgramCache]: Analyzing trace with hash -414082333, now seen corresponding path program 1 times [2021-10-29 04:41:27,802 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-29 04:41:27,803 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2144139589] [2021-10-29 04:41:27,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 04:41:27,803 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-29 04:41:27,803 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_305e363d-3a36-4718-9e7b-f7b7deb81765/bin/utaipan-SDwSMHVbGG/mathsat [2021-10-29 04:41:27,804 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_305e363d-3a36-4718-9e7b-f7b7deb81765/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-29 04:41:27,807 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_305e363d-3a36-4718-9e7b-f7b7deb81765/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-10-29 04:41:27,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 04:41:27,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-29 04:41:27,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 04:41:28,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 04:41:28,062 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-29 04:41:28,174 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 04:41:28,174 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-29 04:41:28,174 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2144139589] [2021-10-29 04:41:28,175 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2144139589] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-29 04:41:28,175 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-29 04:41:28,175 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-10-29 04:41:28,175 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288035011] [2021-10-29 04:41:28,176 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-29 04:41:28,176 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-29 04:41:28,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-29 04:41:28,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-29 04:41:28,177 INFO L87 Difference]: Start difference. First operand 28 states and 34 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) [2021-10-29 04:41:28,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 04:41:28,194 INFO L93 Difference]: Finished difference Result 38 states and 44 transitions. [2021-10-29 04:41:28,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-29 04:41:28,195 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 [2021-10-29 04:41:28,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 04:41:28,196 INFO L225 Difference]: With dead ends: 38 [2021-10-29 04:41:28,196 INFO L226 Difference]: Without dead ends: 28 [2021-10-29 04:41:28,196 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-29 04:41:28,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-10-29 04:41:28,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-10-29 04:41:28,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 27 states have internal predecessors, (33), 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) [2021-10-29 04:41:28,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2021-10-29 04:41:28,200 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 18 [2021-10-29 04:41:28,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 04:41:28,201 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2021-10-29 04:41:28,201 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) [2021-10-29 04:41:28,201 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2021-10-29 04:41:28,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-29 04:41:28,202 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 04:41:28,202 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 04:41:28,216 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_305e363d-3a36-4718-9e7b-f7b7deb81765/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-10-29 04:41:28,412 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_305e363d-3a36-4718-9e7b-f7b7deb81765/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 [2021-10-29 04:41:28,413 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 04:41:28,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 04:41:28,417 INFO L85 PathProgramCache]: Analyzing trace with hash -356824031, now seen corresponding path program 1 times [2021-10-29 04:41:28,417 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-29 04:41:28,418 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [102297038] [2021-10-29 04:41:28,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 04:41:28,418 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-29 04:41:28,418 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_305e363d-3a36-4718-9e7b-f7b7deb81765/bin/utaipan-SDwSMHVbGG/mathsat [2021-10-29 04:41:28,419 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_305e363d-3a36-4718-9e7b-f7b7deb81765/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-29 04:41:28,422 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_305e363d-3a36-4718-9e7b-f7b7deb81765/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-10-29 04:41:28,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 04:41:28,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-29 04:41:28,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 04:41:28,655 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 04:41:28,655 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-29 04:41:28,758 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 04:41:28,759 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-29 04:41:28,759 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [102297038] [2021-10-29 04:41:28,759 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [102297038] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-29 04:41:28,759 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-29 04:41:28,759 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 9 [2021-10-29 04:41:28,760 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884274809] [2021-10-29 04:41:28,760 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-29 04:41:28,760 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-29 04:41:28,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-29 04:41:28,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-10-29 04:41:28,761 INFO L87 Difference]: Start difference. First operand 28 states and 33 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) [2021-10-29 04:41:28,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 04:41:28,855 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2021-10-29 04:41:28,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-29 04:41:28,856 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 [2021-10-29 04:41:28,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 04:41:28,857 INFO L225 Difference]: With dead ends: 40 [2021-10-29 04:41:28,857 INFO L226 Difference]: Without dead ends: 37 [2021-10-29 04:41:28,857 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2021-10-29 04:41:28,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-10-29 04:41:28,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 30. [2021-10-29 04:41:28,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.206896551724138) internal successors, (35), 29 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) [2021-10-29 04:41:28,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2021-10-29 04:41:28,862 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 18 [2021-10-29 04:41:28,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 04:41:28,862 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2021-10-29 04:41:28,863 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) [2021-10-29 04:41:28,863 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2021-10-29 04:41:28,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-29 04:41:28,864 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 04:41:28,864 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 04:41:28,880 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_305e363d-3a36-4718-9e7b-f7b7deb81765/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-10-29 04:41:29,069 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_305e363d-3a36-4718-9e7b-f7b7deb81765/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 [2021-10-29 04:41:29,070 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 04:41:29,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 04:41:29,070 INFO L85 PathProgramCache]: Analyzing trace with hash -208358251, now seen corresponding path program 1 times [2021-10-29 04:41:29,071 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-29 04:41:29,071 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [434623171] [2021-10-29 04:41:29,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 04:41:29,071 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-29 04:41:29,071 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_305e363d-3a36-4718-9e7b-f7b7deb81765/bin/utaipan-SDwSMHVbGG/mathsat [2021-10-29 04:41:29,072 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_305e363d-3a36-4718-9e7b-f7b7deb81765/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-29 04:41:29,073 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_305e363d-3a36-4718-9e7b-f7b7deb81765/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-10-29 04:41:29,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 04:41:29,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-29 04:41:29,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 04:41:29,308 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 04:41:29,309 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-29 04:41:29,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 04:41:29,406 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-29 04:41:29,406 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [434623171] [2021-10-29 04:41:29,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [434623171] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-29 04:41:29,406 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-29 04:41:29,407 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-10-29 04:41:29,407 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831161317] [2021-10-29 04:41:29,407 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-29 04:41:29,407 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-29 04:41:29,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-29 04:41:29,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-29 04:41:29,409 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 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) [2021-10-29 04:41:29,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 04:41:29,447 INFO L93 Difference]: Finished difference Result 43 states and 47 transitions. [2021-10-29 04:41:29,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-29 04:41:29,458 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 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 19 [2021-10-29 04:41:29,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 04:41:29,460 INFO L225 Difference]: With dead ends: 43 [2021-10-29 04:41:29,461 INFO L226 Difference]: Without dead ends: 23 [2021-10-29 04:41:29,461 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-10-29 04:41:29,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-10-29 04:41:29,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-10-29 04:41:29,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.0) internal successors, (22), 22 states have internal predecessors, (22), 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) [2021-10-29 04:41:29,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 22 transitions. [2021-10-29 04:41:29,471 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 22 transitions. Word has length 19 [2021-10-29 04:41:29,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 04:41:29,472 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 22 transitions. [2021-10-29 04:41:29,472 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 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) [2021-10-29 04:41:29,472 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 22 transitions. [2021-10-29 04:41:29,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-29 04:41:29,473 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 04:41:29,473 INFO L513 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] [2021-10-29 04:41:29,490 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_305e363d-3a36-4718-9e7b-f7b7deb81765/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-10-29 04:41:29,689 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_305e363d-3a36-4718-9e7b-f7b7deb81765/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 [2021-10-29 04:41:29,689 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 04:41:29,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 04:41:29,690 INFO L85 PathProgramCache]: Analyzing trace with hash -1524231306, now seen corresponding path program 1 times [2021-10-29 04:41:29,690 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-29 04:41:29,690 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [496605468] [2021-10-29 04:41:29,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 04:41:29,691 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-29 04:41:29,691 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_305e363d-3a36-4718-9e7b-f7b7deb81765/bin/utaipan-SDwSMHVbGG/mathsat [2021-10-29 04:41:29,692 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_305e363d-3a36-4718-9e7b-f7b7deb81765/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-29 04:41:29,699 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_305e363d-3a36-4718-9e7b-f7b7deb81765/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-10-29 04:41:29,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-29 04:41:29,852 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-29 04:41:29,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-29 04:41:29,967 INFO L133 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2021-10-29 04:41:29,967 INFO L627 BasicCegarLoop]: Counterexample is feasible [2021-10-29 04:41:29,968 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-29 04:41:29,987 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_305e363d-3a36-4718-9e7b-f7b7deb81765/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-10-29 04:41:30,170 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_305e363d-3a36-4718-9e7b-f7b7deb81765/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 [2021-10-29 04:41:30,175 INFO L731 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 04:41:30,178 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-29 04:41:30,224 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.10 04:41:30 BoogieIcfgContainer [2021-10-29 04:41:30,226 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-29 04:41:30,227 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-29 04:41:30,227 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-29 04:41:30,227 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-29 04:41:30,228 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 04:41:25" (3/4) ... [2021-10-29 04:41:30,230 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-29 04:41:30,297 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_305e363d-3a36-4718-9e7b-f7b7deb81765/bin/utaipan-SDwSMHVbGG/witness.graphml [2021-10-29 04:41:30,298 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-29 04:41:30,299 INFO L168 Benchmark]: Toolchain (without parser) took 5937.87 ms. Allocated memory was 54.5 MB in the beginning and 75.5 MB in the end (delta: 21.0 MB). Free memory was 32.4 MB in the beginning and 28.8 MB in the end (delta: 3.5 MB). Peak memory consumption was 27.4 MB. Max. memory is 16.1 GB. [2021-10-29 04:41:30,300 INFO L168 Benchmark]: CDTParser took 0.35 ms. Allocated memory is still 54.5 MB. Free memory is still 35.8 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-29 04:41:30,300 INFO L168 Benchmark]: CACSL2BoogieTranslator took 288.17 ms. Allocated memory is still 54.5 MB. Free memory was 32.2 MB in the beginning and 36.9 MB in the end (delta: -4.7 MB). Peak memory consumption was 13.8 MB. Max. memory is 16.1 GB. [2021-10-29 04:41:30,301 INFO L168 Benchmark]: Boogie Procedure Inliner took 52.20 ms. Allocated memory is still 54.5 MB. Free memory was 36.9 MB in the beginning and 35.0 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-29 04:41:30,302 INFO L168 Benchmark]: Boogie Preprocessor took 38.95 ms. Allocated memory is still 54.5 MB. Free memory was 35.0 MB in the beginning and 33.6 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-29 04:41:30,302 INFO L168 Benchmark]: RCFGBuilder took 540.85 ms. Allocated memory was 54.5 MB in the beginning and 75.5 MB in the end (delta: 21.0 MB). Free memory was 33.4 MB in the beginning and 54.1 MB in the end (delta: -20.7 MB). Peak memory consumption was 12.3 MB. Max. memory is 16.1 GB. [2021-10-29 04:41:30,303 INFO L168 Benchmark]: TraceAbstraction took 4939.33 ms. Allocated memory is still 75.5 MB. Free memory was 53.5 MB in the beginning and 31.5 MB in the end (delta: 22.0 MB). Peak memory consumption was 20.2 MB. Max. memory is 16.1 GB. [2021-10-29 04:41:30,303 INFO L168 Benchmark]: Witness Printer took 70.94 ms. Allocated memory is still 75.5 MB. Free memory was 31.5 MB in the beginning and 28.8 MB in the end (delta: 2.7 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-29 04:41:30,306 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.35 ms. Allocated memory is still 54.5 MB. Free memory is still 35.8 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 288.17 ms. Allocated memory is still 54.5 MB. Free memory was 32.2 MB in the beginning and 36.9 MB in the end (delta: -4.7 MB). Peak memory consumption was 13.8 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 52.20 ms. Allocated memory is still 54.5 MB. Free memory was 36.9 MB in the beginning and 35.0 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 38.95 ms. Allocated memory is still 54.5 MB. Free memory was 35.0 MB in the beginning and 33.6 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 540.85 ms. Allocated memory was 54.5 MB in the beginning and 75.5 MB in the end (delta: 21.0 MB). Free memory was 33.4 MB in the beginning and 54.1 MB in the end (delta: -20.7 MB). Peak memory consumption was 12.3 MB. Max. memory is 16.1 GB. * TraceAbstraction took 4939.33 ms. Allocated memory is still 75.5 MB. Free memory was 53.5 MB in the beginning and 31.5 MB in the end (delta: 22.0 MB). Peak memory consumption was 20.2 MB. Max. memory is 16.1 GB. * Witness Printer took 70.94 ms. Allocated memory is still 75.5 MB. Free memory was 31.5 MB in the beginning and 28.8 MB in the end (delta: 2.7 MB). Peak memory consumption was 4.2 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, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 72]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L66] float x = -0.0f; [L67] float y = 0.0f; [L15] __uint32_t w; [L18] ieee_float_shape_type gf_u; [L19] gf_u.value = (x) [L20] EXPR gf_u.word [L20] (w) = gf_u.word [L23] COND TRUE w == 0x00000000 || w == 0x80000000 [L24] return 2; [L38] COND FALSE !(__fpclassify_float(x) == 0) [L15] __uint32_t w; [L18] ieee_float_shape_type gf_u; [L19] gf_u.value = (x) [L20] EXPR gf_u.word [L20] (w) = gf_u.word [L23] COND TRUE w == 0x00000000 || w == 0x80000000 [L24] return 2; [L40] COND FALSE !(__fpclassify_float(y) == 0) [L43] EXPR x < y ? x : y [L43] return x < y ? x : y; [L68] float res = fmin_float(x, y); [L71] EXPR res == -0.0f && __signbit_float(res) == 1 [L47] __uint32_t w; [L50] ieee_float_shape_type gf_u; [L51] gf_u.value = (x) [L52] EXPR gf_u.word [L52] (w) = gf_u.word [L55] return (w & 0x80000000) != 0; [L71] EXPR res == -0.0f && __signbit_float(res) == 1 [L71] COND TRUE !(res == -0.0f && __signbit_float(res) == 1) [L72] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 32 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 4.7s, OverallIterations: 8, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 222 SDtfs, 167 SDslu, 326 SDs, 0 SdLazy, 105 SolverSat, 15 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 209 GetRequests, 172 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s Time, 0.0s 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, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 7 MinimizatonAttempts, 59 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 1.3s InterpolantComputationTime, 128 NumberOfCodeBlocks, 128 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 198 ConstructedInterpolants, 0 QuantifiedInterpolants, 491 SizeOfPredicates, 27 NumberOfNonLiveVariables, 413 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! [2021-10-29 04:41:30,365 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_305e363d-3a36-4718-9e7b-f7b7deb81765/bin/utaipan-SDwSMHVbGG/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...