./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/square_5+soft_float_4-2a.c.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60ebbfa-f878-4fa9-9696-dce0d2935527/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60ebbfa-f878-4fa9-9696-dce0d2935527/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60ebbfa-f878-4fa9-9696-dce0d2935527/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60ebbfa-f878-4fa9-9696-dce0d2935527/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/square_5+soft_float_4-2a.c.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60ebbfa-f878-4fa9-9696-dce0d2935527/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60ebbfa-f878-4fa9-9696-dce0d2935527/bin/utaipan-vmNK8stdcF --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 2d3a0113f0e8b781548a014794ff4c594483afc44f19a8c585ba3b3e554b1b3f --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 23:18:40,994 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 23:18:40,996 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 23:18:41,049 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 23:18:41,050 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 23:18:41,054 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 23:18:41,056 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 23:18:41,061 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 23:18:41,063 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 23:18:41,071 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 23:18:41,072 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 23:18:41,074 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 23:18:41,074 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 23:18:41,078 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 23:18:41,081 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 23:18:41,088 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 23:18:41,091 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 23:18:41,092 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 23:18:41,094 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 23:18:41,101 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 23:18:41,106 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 23:18:41,107 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 23:18:41,110 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 23:18:41,112 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 23:18:41,116 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 23:18:41,117 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 23:18:41,117 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 23:18:41,119 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 23:18:41,120 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 23:18:41,121 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 23:18:41,123 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 23:18:41,123 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 23:18:41,126 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 23:18:41,127 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 23:18:41,128 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 23:18:41,129 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 23:18:41,129 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 23:18:41,130 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 23:18:41,130 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 23:18:41,131 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 23:18:41,132 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 23:18:41,132 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60ebbfa-f878-4fa9-9696-dce0d2935527/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-12 23:18:41,179 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 23:18:41,179 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 23:18:41,182 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 23:18:41,182 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 23:18:41,182 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 23:18:41,182 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 23:18:41,183 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 23:18:41,183 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-12 23:18:41,183 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 23:18:41,183 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 23:18:41,184 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-12 23:18:41,185 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-12 23:18:41,185 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 23:18:41,185 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-12 23:18:41,186 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-12 23:18:41,186 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-12 23:18:41,187 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 23:18:41,187 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 23:18:41,187 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-12 23:18:41,188 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 23:18:41,188 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 23:18:41,188 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 23:18:41,188 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 23:18:41,188 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 23:18:41,189 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 23:18:41,189 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 23:18:41,189 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 23:18:41,189 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 23:18:41,190 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 23:18:41,191 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 23:18:41,192 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 23:18:41,192 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:18:41,192 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 23:18:41,192 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 23:18:41,193 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 23:18:41,193 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-12 23:18:41,193 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-12 23:18:41,193 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 23:18:41,194 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 23:18:41,194 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 23:18:41,194 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_f60ebbfa-f878-4fa9-9696-dce0d2935527/bin/utaipan-vmNK8stdcF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60ebbfa-f878-4fa9-9696-dce0d2935527/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2d3a0113f0e8b781548a014794ff4c594483afc44f19a8c585ba3b3e554b1b3f [2021-11-12 23:18:41,463 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 23:18:41,492 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 23:18:41,496 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 23:18:41,497 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 23:18:41,498 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 23:18:41,499 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60ebbfa-f878-4fa9-9696-dce0d2935527/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/combinations/square_5+soft_float_4-2a.c.cil.c [2021-11-12 23:18:41,578 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60ebbfa-f878-4fa9-9696-dce0d2935527/bin/utaipan-vmNK8stdcF/data/64736b5f4/1a5742a9189a499bb9ac1bfbe099b584/FLAG340d1b0d8 [2021-11-12 23:18:42,088 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 23:18:42,089 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60ebbfa-f878-4fa9-9696-dce0d2935527/sv-benchmarks/c/combinations/square_5+soft_float_4-2a.c.cil.c [2021-11-12 23:18:42,099 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60ebbfa-f878-4fa9-9696-dce0d2935527/bin/utaipan-vmNK8stdcF/data/64736b5f4/1a5742a9189a499bb9ac1bfbe099b584/FLAG340d1b0d8 [2021-11-12 23:18:42,417 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60ebbfa-f878-4fa9-9696-dce0d2935527/bin/utaipan-vmNK8stdcF/data/64736b5f4/1a5742a9189a499bb9ac1bfbe099b584 [2021-11-12 23:18:42,420 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 23:18:42,421 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 23:18:42,442 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 23:18:42,443 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 23:18:42,447 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 23:18:42,449 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:18:42" (1/1) ... [2021-11-12 23:18:42,452 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@351469de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:18:42, skipping insertion in model container [2021-11-12 23:18:42,453 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:18:42" (1/1) ... [2021-11-12 23:18:42,461 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 23:18:42,495 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:18:42,751 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_f60ebbfa-f878-4fa9-9696-dce0d2935527/sv-benchmarks/c/combinations/square_5+soft_float_4-2a.c.cil.c[1998,2011] [2021-11-12 23:18:42,761 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_f60ebbfa-f878-4fa9-9696-dce0d2935527/sv-benchmarks/c/combinations/square_5+soft_float_4-2a.c.cil.c[2392,2405] [2021-11-12 23:18:42,819 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:18:42,828 INFO L203 MainTranslator]: Completed pre-run [2021-11-12 23:18:42,843 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_f60ebbfa-f878-4fa9-9696-dce0d2935527/sv-benchmarks/c/combinations/square_5+soft_float_4-2a.c.cil.c[1998,2011] [2021-11-12 23:18:42,845 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_f60ebbfa-f878-4fa9-9696-dce0d2935527/sv-benchmarks/c/combinations/square_5+soft_float_4-2a.c.cil.c[2392,2405] [2021-11-12 23:18:42,872 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:18:42,892 INFO L208 MainTranslator]: Completed translation [2021-11-12 23:18:42,892 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:18:42 WrapperNode [2021-11-12 23:18:42,892 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 23:18:42,893 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-12 23:18:42,893 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-12 23:18:42,893 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-12 23:18:42,901 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:18:42" (1/1) ... [2021-11-12 23:18:42,911 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:18:42" (1/1) ... [2021-11-12 23:18:42,932 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-12 23:18:42,933 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-12 23:18:42,933 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-12 23:18:42,933 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-12 23:18:42,941 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:18:42" (1/1) ... [2021-11-12 23:18:42,942 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:18:42" (1/1) ... [2021-11-12 23:18:42,944 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:18:42" (1/1) ... [2021-11-12 23:18:42,944 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:18:42" (1/1) ... [2021-11-12 23:18:42,951 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:18:42" (1/1) ... [2021-11-12 23:18:42,956 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:18:42" (1/1) ... [2021-11-12 23:18:42,958 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:18:42" (1/1) ... [2021-11-12 23:18:42,962 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-12 23:18:42,963 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-12 23:18:42,963 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-12 23:18:42,963 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-12 23:18:42,964 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:18:42" (1/1) ... [2021-11-12 23:18:42,971 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:18:42,986 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60ebbfa-f878-4fa9-9696-dce0d2935527/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:18:42,999 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60ebbfa-f878-4fa9-9696-dce0d2935527/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-12 23:18:43,036 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60ebbfa-f878-4fa9-9696-dce0d2935527/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-12 23:18:43,060 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-12 23:18:43,060 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2021-11-12 23:18:43,060 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2021-11-12 23:18:43,061 INFO L130 BoogieDeclarations]: Found specification of procedure addflt [2021-11-12 23:18:43,061 INFO L138 BoogieDeclarations]: Found implementation of procedure addflt [2021-11-12 23:18:43,061 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-12 23:18:43,061 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-12 23:18:43,061 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-12 23:18:43,061 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-12 23:18:43,062 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-12 23:18:43,495 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-12 23:18:43,496 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-12 23:18:43,498 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:18:43 BoogieIcfgContainer [2021-11-12 23:18:43,498 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-12 23:18:43,500 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-12 23:18:43,500 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-12 23:18:43,504 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-12 23:18:43,504 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 11:18:42" (1/3) ... [2021-11-12 23:18:43,505 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c814032 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:18:43, skipping insertion in model container [2021-11-12 23:18:43,505 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:18:42" (2/3) ... [2021-11-12 23:18:43,506 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c814032 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:18:43, skipping insertion in model container [2021-11-12 23:18:43,506 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:18:43" (3/3) ... [2021-11-12 23:18:43,507 INFO L111 eAbstractionObserver]: Analyzing ICFG square_5+soft_float_4-2a.c.cil.c [2021-11-12 23:18:43,512 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-12 23:18:43,513 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-12 23:18:43,568 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-12 23:18:43,576 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-12 23:18:43,576 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-12 23:18:43,595 INFO L276 IsEmpty]: Start isEmpty. Operand has 49 states, 35 states have (on average 1.4857142857142858) internal successors, (52), 37 states have internal predecessors, (52), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-12 23:18:43,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-11-12 23:18:43,605 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:18:43,606 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-11-12 23:18:43,607 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:18:43,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:18:43,620 INFO L85 PathProgramCache]: Analyzing trace with hash 6807338, now seen corresponding path program 1 times [2021-11-12 23:18:43,631 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:18:43,631 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134751957] [2021-11-12 23:18:43,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:18:43,633 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:18:43,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-12 23:18:43,793 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-12 23:18:43,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-12 23:18:43,891 INFO L133 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-11-12 23:18:43,893 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-11-12 23:18:43,894 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2021-11-12 23:18:43,896 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2021-11-12 23:18:43,896 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-12 23:18:43,901 INFO L732 BasicCegarLoop]: Path program histogram: [1] [2021-11-12 23:18:43,903 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-12 23:18:43,920 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.11 11:18:43 BoogieIcfgContainer [2021-11-12 23:18:43,920 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-12 23:18:43,921 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-12 23:18:43,921 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-12 23:18:43,922 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-12 23:18:43,922 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:18:43" (3/4) ... [2021-11-12 23:18:43,926 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-11-12 23:18:43,926 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-12 23:18:43,927 INFO L158 Benchmark]: Toolchain (without parser) took 1505.47ms. Allocated memory was 92.3MB in the beginning and 111.1MB in the end (delta: 18.9MB). Free memory was 51.2MB in the beginning and 85.4MB in the end (delta: -34.2MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-12 23:18:43,928 INFO L158 Benchmark]: CDTParser took 0.28ms. Allocated memory is still 92.3MB. Free memory was 67.9MB in the beginning and 67.9MB in the end (delta: 43.7kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-12 23:18:43,929 INFO L158 Benchmark]: CACSL2BoogieTranslator took 450.41ms. Allocated memory is still 92.3MB. Free memory was 71.9MB in the beginning and 64.9MB in the end (delta: 7.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-12 23:18:43,929 INFO L158 Benchmark]: Boogie Procedure Inliner took 38.76ms. Allocated memory is still 92.3MB. Free memory was 64.9MB in the beginning and 63.4MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-12 23:18:43,930 INFO L158 Benchmark]: Boogie Preprocessor took 29.35ms. Allocated memory is still 92.3MB. Free memory was 63.4MB in the beginning and 62.0MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-12 23:18:43,931 INFO L158 Benchmark]: RCFGBuilder took 535.71ms. Allocated memory is still 92.3MB. Free memory was 61.8MB in the beginning and 46.2MB in the end (delta: 15.6MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2021-11-12 23:18:43,932 INFO L158 Benchmark]: TraceAbstraction took 420.57ms. Allocated memory was 92.3MB in the beginning and 111.1MB in the end (delta: 18.9MB). Free memory was 45.7MB in the beginning and 85.4MB in the end (delta: -39.7MB). Peak memory consumption was 17.5MB. Max. memory is 16.1GB. [2021-11-12 23:18:43,932 INFO L158 Benchmark]: Witness Printer took 4.75ms. Allocated memory is still 111.1MB. Free memory is still 85.4MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-12 23:18:43,936 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28ms. Allocated memory is still 92.3MB. Free memory was 67.9MB in the beginning and 67.9MB in the end (delta: 43.7kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 450.41ms. Allocated memory is still 92.3MB. Free memory was 71.9MB in the beginning and 64.9MB in the end (delta: 7.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 38.76ms. Allocated memory is still 92.3MB. Free memory was 64.9MB in the beginning and 63.4MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 29.35ms. Allocated memory is still 92.3MB. Free memory was 63.4MB in the beginning and 62.0MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 535.71ms. Allocated memory is still 92.3MB. Free memory was 61.8MB in the beginning and 46.2MB in the end (delta: 15.6MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * TraceAbstraction took 420.57ms. Allocated memory was 92.3MB in the beginning and 111.1MB in the end (delta: 18.9MB). Free memory was 45.7MB in the beginning and 85.4MB in the end (delta: -39.7MB). Peak memory consumption was 17.5MB. Max. memory is 16.1GB. * Witness Printer took 4.75ms. Allocated memory is still 111.1MB. Free memory is still 85.4MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 48]: 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 47, overapproximation of someBinaryArithmeticFLOAToperation at line 45. Possible FailurePath: [L310] COND TRUE __VERIFIER_nondet_int() [L311] CALL main1() [L39] float IN = __VERIFIER_nondet_float(); [L40] CALL assume_abort_if_not(IN >= 0.0f && IN < 1.0f) [L34] COND FALSE !(!cond) [L40] RET assume_abort_if_not(IN >= 0.0f && IN < 1.0f) [L42] float x = IN; [L44-L45] float result = 1.0f + 0.5f*x - 0.125f*x*x + 0.0625f*x*x*x - 0.0390625f*x*x*x*x; VAL [IN=49, x=49] [L47] COND TRUE !(result >= 0.0f && result < 1.3985f) VAL [IN=49, x=49] [L48] reach_error() VAL [IN=49, x=49] - UnprovableResult [Line: 61]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 49 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 0.3s, OverallIterations: 1, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: , PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=49occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 4 NumberOfCodeBlocks, 4 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-11-12 23:18:43,966 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60ebbfa-f878-4fa9-9696-dce0d2935527/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60ebbfa-f878-4fa9-9696-dce0d2935527/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60ebbfa-f878-4fa9-9696-dce0d2935527/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60ebbfa-f878-4fa9-9696-dce0d2935527/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60ebbfa-f878-4fa9-9696-dce0d2935527/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/square_5+soft_float_4-2a.c.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60ebbfa-f878-4fa9-9696-dce0d2935527/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60ebbfa-f878-4fa9-9696-dce0d2935527/bin/utaipan-vmNK8stdcF --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 2d3a0113f0e8b781548a014794ff4c594483afc44f19a8c585ba3b3e554b1b3f --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 23:18:46,384 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 23:18:46,386 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 23:18:46,417 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 23:18:46,417 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 23:18:46,419 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 23:18:46,421 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 23:18:46,423 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 23:18:46,426 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 23:18:46,427 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 23:18:46,428 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 23:18:46,429 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 23:18:46,430 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 23:18:46,431 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 23:18:46,433 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 23:18:46,434 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 23:18:46,435 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 23:18:46,437 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 23:18:46,439 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 23:18:46,441 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 23:18:46,443 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 23:18:46,445 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 23:18:46,446 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 23:18:46,447 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 23:18:46,451 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 23:18:46,451 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 23:18:46,451 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 23:18:46,452 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 23:18:46,453 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 23:18:46,454 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 23:18:46,454 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 23:18:46,455 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 23:18:46,456 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 23:18:46,457 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 23:18:46,458 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 23:18:46,459 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 23:18:46,482 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 23:18:46,483 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 23:18:46,484 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 23:18:46,485 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 23:18:46,487 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 23:18:46,488 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60ebbfa-f878-4fa9-9696-dce0d2935527/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-12 23:18:46,533 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 23:18:46,534 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 23:18:46,535 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 23:18:46,535 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 23:18:46,536 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 23:18:46,536 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 23:18:46,536 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 23:18:46,536 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 23:18:46,537 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 23:18:46,537 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 23:18:46,539 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 23:18:46,540 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 23:18:46,540 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 23:18:46,540 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 23:18:46,540 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 23:18:46,541 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 23:18:46,541 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 23:18:46,541 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 23:18:46,541 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-12 23:18:46,541 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-12 23:18:46,542 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 23:18:46,542 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 23:18:46,542 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 23:18:46,542 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 23:18:46,543 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 23:18:46,543 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-12 23:18:46,543 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 23:18:46,543 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:18:46,544 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 23:18:46,544 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 23:18:46,544 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 23:18:46,544 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-12 23:18:46,545 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-12 23:18:46,545 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 23:18:46,545 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 23:18:46,545 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 23:18:46,546 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_f60ebbfa-f878-4fa9-9696-dce0d2935527/bin/utaipan-vmNK8stdcF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60ebbfa-f878-4fa9-9696-dce0d2935527/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2d3a0113f0e8b781548a014794ff4c594483afc44f19a8c585ba3b3e554b1b3f [2021-11-12 23:18:46,961 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 23:18:46,991 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 23:18:46,994 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 23:18:46,998 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 23:18:46,998 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 23:18:47,000 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60ebbfa-f878-4fa9-9696-dce0d2935527/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/combinations/square_5+soft_float_4-2a.c.cil.c [2021-11-12 23:18:47,088 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60ebbfa-f878-4fa9-9696-dce0d2935527/bin/utaipan-vmNK8stdcF/data/57c6cc770/6e598d2e11ff4d1fbdf2d20fb04ea39c/FLAG885c847a1 [2021-11-12 23:18:47,688 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 23:18:47,689 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60ebbfa-f878-4fa9-9696-dce0d2935527/sv-benchmarks/c/combinations/square_5+soft_float_4-2a.c.cil.c [2021-11-12 23:18:47,704 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60ebbfa-f878-4fa9-9696-dce0d2935527/bin/utaipan-vmNK8stdcF/data/57c6cc770/6e598d2e11ff4d1fbdf2d20fb04ea39c/FLAG885c847a1 [2021-11-12 23:18:48,031 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60ebbfa-f878-4fa9-9696-dce0d2935527/bin/utaipan-vmNK8stdcF/data/57c6cc770/6e598d2e11ff4d1fbdf2d20fb04ea39c [2021-11-12 23:18:48,038 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 23:18:48,041 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 23:18:48,044 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 23:18:48,044 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 23:18:48,049 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 23:18:48,051 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:18:48" (1/1) ... [2021-11-12 23:18:48,052 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@51d39ed1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:18:48, skipping insertion in model container [2021-11-12 23:18:48,054 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:18:48" (1/1) ... [2021-11-12 23:18:48,063 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 23:18:48,121 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:18:48,295 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_f60ebbfa-f878-4fa9-9696-dce0d2935527/sv-benchmarks/c/combinations/square_5+soft_float_4-2a.c.cil.c[1998,2011] [2021-11-12 23:18:48,300 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_f60ebbfa-f878-4fa9-9696-dce0d2935527/sv-benchmarks/c/combinations/square_5+soft_float_4-2a.c.cil.c[2392,2405] [2021-11-12 23:18:48,398 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:18:48,416 INFO L203 MainTranslator]: Completed pre-run [2021-11-12 23:18:48,437 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_f60ebbfa-f878-4fa9-9696-dce0d2935527/sv-benchmarks/c/combinations/square_5+soft_float_4-2a.c.cil.c[1998,2011] [2021-11-12 23:18:48,439 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_f60ebbfa-f878-4fa9-9696-dce0d2935527/sv-benchmarks/c/combinations/square_5+soft_float_4-2a.c.cil.c[2392,2405] [2021-11-12 23:18:48,491 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:18:48,510 INFO L208 MainTranslator]: Completed translation [2021-11-12 23:18:48,511 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:18:48 WrapperNode [2021-11-12 23:18:48,511 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 23:18:48,513 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-12 23:18:48,513 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-12 23:18:48,514 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-12 23:18:48,523 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:18:48" (1/1) ... [2021-11-12 23:18:48,543 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:18:48" (1/1) ... [2021-11-12 23:18:48,570 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-12 23:18:48,571 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-12 23:18:48,571 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-12 23:18:48,571 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-12 23:18:48,582 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:18:48" (1/1) ... [2021-11-12 23:18:48,582 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:18:48" (1/1) ... [2021-11-12 23:18:48,588 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:18:48" (1/1) ... [2021-11-12 23:18:48,589 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:18:48" (1/1) ... [2021-11-12 23:18:48,603 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:18:48" (1/1) ... [2021-11-12 23:18:48,610 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:18:48" (1/1) ... [2021-11-12 23:18:48,613 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:18:48" (1/1) ... [2021-11-12 23:18:48,619 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-12 23:18:48,620 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-12 23:18:48,620 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-12 23:18:48,620 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-12 23:18:48,621 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:18:48" (1/1) ... [2021-11-12 23:18:48,630 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:18:48,644 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60ebbfa-f878-4fa9-9696-dce0d2935527/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:18:48,671 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60ebbfa-f878-4fa9-9696-dce0d2935527/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-12 23:18:48,683 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60ebbfa-f878-4fa9-9696-dce0d2935527/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-12 23:18:48,718 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-12 23:18:48,718 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-12 23:18:48,718 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2021-11-12 23:18:48,719 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2021-11-12 23:18:48,719 INFO L130 BoogieDeclarations]: Found specification of procedure addflt [2021-11-12 23:18:48,719 INFO L138 BoogieDeclarations]: Found implementation of procedure addflt [2021-11-12 23:18:48,719 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-12 23:18:48,719 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-12 23:18:48,720 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-12 23:18:48,720 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-12 23:18:51,296 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-12 23:18:51,297 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-12 23:18:51,299 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:18:51 BoogieIcfgContainer [2021-11-12 23:18:51,299 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-12 23:18:51,301 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-12 23:18:51,301 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-12 23:18:51,305 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-12 23:18:51,305 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 11:18:48" (1/3) ... [2021-11-12 23:18:51,306 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@322a1323 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:18:51, skipping insertion in model container [2021-11-12 23:18:51,306 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:18:48" (2/3) ... [2021-11-12 23:18:51,307 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@322a1323 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:18:51, skipping insertion in model container [2021-11-12 23:18:51,307 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:18:51" (3/3) ... [2021-11-12 23:18:51,308 INFO L111 eAbstractionObserver]: Analyzing ICFG square_5+soft_float_4-2a.c.cil.c [2021-11-12 23:18:51,314 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-12 23:18:51,315 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-12 23:18:51,363 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-12 23:18:51,370 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-12 23:18:51,370 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-12 23:18:51,389 INFO L276 IsEmpty]: Start isEmpty. Operand has 63 states, 49 states have (on average 1.489795918367347) internal successors, (73), 51 states have internal predecessors, (73), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-12 23:18:51,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-12 23:18:51,393 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:18:51,394 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:18:51,395 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:18:51,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:18:51,400 INFO L85 PathProgramCache]: Analyzing trace with hash -548115930, now seen corresponding path program 1 times [2021-11-12 23:18:51,411 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:18:51,411 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1026327766] [2021-11-12 23:18:51,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:18:51,412 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:18:51,413 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60ebbfa-f878-4fa9-9696-dce0d2935527/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:18:51,414 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60ebbfa-f878-4fa9-9696-dce0d2935527/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:18:51,415 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60ebbfa-f878-4fa9-9696-dce0d2935527/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-12 23:18:51,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:18:51,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-12 23:18:51,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:18:51,979 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:18:51,979 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:18:52,013 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:18:52,014 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:18:52,014 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1026327766] [2021-11-12 23:18:52,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1026327766] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:18:52,016 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:18:52,016 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-12 23:18:52,019 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993789364] [2021-11-12 23:18:52,021 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:18:52,025 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-12 23:18:52,026 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:18:52,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-12 23:18:52,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-12 23:18:52,065 INFO L87 Difference]: Start difference. First operand has 63 states, 49 states have (on average 1.489795918367347) internal successors, (73), 51 states have internal predecessors, (73), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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) [2021-11-12 23:18:52,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:18:52,127 INFO L93 Difference]: Finished difference Result 121 states and 178 transitions. [2021-11-12 23:18:52,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-12 23:18:52,129 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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 7 [2021-11-12 23:18:52,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:18:52,138 INFO L225 Difference]: With dead ends: 121 [2021-11-12 23:18:52,138 INFO L226 Difference]: Without dead ends: 56 [2021-11-12 23:18:52,143 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-12 23:18:52,148 INFO L933 BasicCegarLoop]: 81 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.20ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.00ms IncrementalHoareTripleChecker+Time [2021-11-12 23:18:52,156 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 3.20ms Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.00ms Time] [2021-11-12 23:18:52,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-11-12 23:18:52,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2021-11-12 23:18:52,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 43 states have (on average 1.3488372093023255) internal successors, (58), 45 states have internal predecessors, (58), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-12 23:18:52,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 73 transitions. [2021-11-12 23:18:52,228 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 73 transitions. Word has length 7 [2021-11-12 23:18:52,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:18:52,228 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 73 transitions. [2021-11-12 23:18:52,229 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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) [2021-11-12 23:18:52,229 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 73 transitions. [2021-11-12 23:18:52,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-12 23:18:52,230 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:18:52,230 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:18:52,258 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60ebbfa-f878-4fa9-9696-dce0d2935527/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-12 23:18:52,451 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60ebbfa-f878-4fa9-9696-dce0d2935527/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:18:52,451 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:18:52,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:18:52,452 INFO L85 PathProgramCache]: Analyzing trace with hash -548056348, now seen corresponding path program 1 times [2021-11-12 23:18:52,453 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:18:52,453 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1781864236] [2021-11-12 23:18:52,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:18:52,453 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:18:52,454 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60ebbfa-f878-4fa9-9696-dce0d2935527/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:18:52,455 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60ebbfa-f878-4fa9-9696-dce0d2935527/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:18:52,462 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f60ebbfa-f878-4fa9-9696-dce0d2935527/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process