./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/float-benchs/inv_square-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 57096758 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615f8cba-f3d7-4b4d-8fd4-3802bda4d5f2/bin/utaipan-mTDlp9Zugs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615f8cba-f3d7-4b4d-8fd4-3802bda4d5f2/bin/utaipan-mTDlp9Zugs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615f8cba-f3d7-4b4d-8fd4-3802bda4d5f2/bin/utaipan-mTDlp9Zugs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615f8cba-f3d7-4b4d-8fd4-3802bda4d5f2/bin/utaipan-mTDlp9Zugs/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-benchs/inv_square-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615f8cba-f3d7-4b4d-8fd4-3802bda4d5f2/bin/utaipan-mTDlp9Zugs/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615f8cba-f3d7-4b4d-8fd4-3802bda4d5f2/bin/utaipan-mTDlp9Zugs --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 53d53b1526e829d58326d87a7aff591d9debe20f ................................................................................................................................................................................................................................................. 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_615f8cba-f3d7-4b4d-8fd4-3802bda4d5f2/bin/utaipan-mTDlp9Zugs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615f8cba-f3d7-4b4d-8fd4-3802bda4d5f2/bin/utaipan-mTDlp9Zugs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615f8cba-f3d7-4b4d-8fd4-3802bda4d5f2/bin/utaipan-mTDlp9Zugs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615f8cba-f3d7-4b4d-8fd4-3802bda4d5f2/bin/utaipan-mTDlp9Zugs/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-benchs/inv_square-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615f8cba-f3d7-4b4d-8fd4-3802bda4d5f2/bin/utaipan-mTDlp9Zugs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615f8cba-f3d7-4b4d-8fd4-3802bda4d5f2/bin/utaipan-mTDlp9Zugs --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 53d53b1526e829d58326d87a7aff591d9debe20f .................................................................................................................................................................................................................................................................................................. 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-5709675 [2021-10-16 02:35:57,079 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-16 02:35:57,083 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-16 02:35:57,153 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-16 02:35:57,154 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-16 02:35:57,161 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-16 02:35:57,163 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-16 02:35:57,168 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-16 02:35:57,172 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-16 02:35:57,179 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-16 02:35:57,180 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-16 02:35:57,183 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-16 02:35:57,183 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-16 02:35:57,187 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-16 02:35:57,190 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-16 02:35:57,200 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-16 02:35:57,202 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-16 02:35:57,204 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-16 02:35:57,207 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-16 02:35:57,217 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-16 02:35:57,219 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-16 02:35:57,222 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-16 02:35:57,226 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-16 02:35:57,227 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-16 02:35:57,239 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-16 02:35:57,239 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-16 02:35:57,240 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-16 02:35:57,243 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-16 02:35:57,244 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-16 02:35:57,246 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-16 02:35:57,246 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-16 02:35:57,248 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-16 02:35:57,250 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-16 02:35:57,252 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-16 02:35:57,255 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-16 02:35:57,255 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-16 02:35:57,256 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-16 02:35:57,257 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-16 02:35:57,257 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-16 02:35:57,259 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-16 02:35:57,260 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-16 02:35:57,262 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615f8cba-f3d7-4b4d-8fd4-3802bda4d5f2/bin/utaipan-mTDlp9Zugs/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-16 02:35:57,317 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-16 02:35:57,318 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-16 02:35:57,320 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-16 02:35:57,320 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-16 02:35:57,321 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-16 02:35:57,321 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-16 02:35:57,321 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-16 02:35:57,322 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-16 02:35:57,322 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-16 02:35:57,322 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-16 02:35:57,323 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-16 02:35:57,324 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-16 02:35:57,324 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-16 02:35:57,324 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-16 02:35:57,325 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-16 02:35:57,326 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-16 02:35:57,326 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-16 02:35:57,326 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-16 02:35:57,327 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-16 02:35:57,327 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-16 02:35:57,327 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-16 02:35:57,327 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-16 02:35:57,328 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-16 02:35:57,328 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-16 02:35:57,328 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-16 02:35:57,328 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-16 02:35:57,329 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-16 02:35:57,329 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-16 02:35:57,329 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-16 02:35:57,329 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-16 02:35:57,330 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 02:35:57,330 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-16 02:35:57,331 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-16 02:35:57,331 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-16 02:35:57,331 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-16 02:35:57,331 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-16 02:35:57,332 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-16 02:35:57,332 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-16 02:35:57,332 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-16 02:35:57,332 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_615f8cba-f3d7-4b4d-8fd4-3802bda4d5f2/bin/utaipan-mTDlp9Zugs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615f8cba-f3d7-4b4d-8fd4-3802bda4d5f2/bin/utaipan-mTDlp9Zugs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 53d53b1526e829d58326d87a7aff591d9debe20f [2021-10-16 02:35:57,779 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-16 02:35:57,819 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-16 02:35:57,822 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-16 02:35:57,824 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-16 02:35:57,825 INFO L275 PluginConnector]: CDTParser initialized [2021-10-16 02:35:57,826 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615f8cba-f3d7-4b4d-8fd4-3802bda4d5f2/bin/utaipan-mTDlp9Zugs/../../sv-benchmarks/c/float-benchs/inv_square-1.c [2021-10-16 02:35:57,917 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615f8cba-f3d7-4b4d-8fd4-3802bda4d5f2/bin/utaipan-mTDlp9Zugs/data/f76377577/13888a2c508645eca86ced4f57b5549d/FLAG40ff75f44 [2021-10-16 02:35:58,569 INFO L306 CDTParser]: Found 1 translation units. [2021-10-16 02:35:58,570 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615f8cba-f3d7-4b4d-8fd4-3802bda4d5f2/sv-benchmarks/c/float-benchs/inv_square-1.c [2021-10-16 02:35:58,584 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615f8cba-f3d7-4b4d-8fd4-3802bda4d5f2/bin/utaipan-mTDlp9Zugs/data/f76377577/13888a2c508645eca86ced4f57b5549d/FLAG40ff75f44 [2021-10-16 02:35:58,909 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615f8cba-f3d7-4b4d-8fd4-3802bda4d5f2/bin/utaipan-mTDlp9Zugs/data/f76377577/13888a2c508645eca86ced4f57b5549d [2021-10-16 02:35:58,913 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-16 02:35:58,914 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-16 02:35:58,932 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-16 02:35:58,932 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-16 02:35:58,936 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-16 02:35:58,937 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:35:58" (1/1) ... [2021-10-16 02:35:58,939 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@38947096 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:35:58, skipping insertion in model container [2021-10-16 02:35:58,939 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:35:58" (1/1) ... [2021-10-16 02:35:58,947 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-16 02:35:58,962 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-16 02:35:59,281 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_615f8cba-f3d7-4b4d-8fd4-3802bda4d5f2/sv-benchmarks/c/float-benchs/inv_square-1.c[487,500] [2021-10-16 02:35:59,303 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 02:35:59,314 INFO L203 MainTranslator]: Completed pre-run [2021-10-16 02:35:59,330 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_615f8cba-f3d7-4b4d-8fd4-3802bda4d5f2/sv-benchmarks/c/float-benchs/inv_square-1.c[487,500] [2021-10-16 02:35:59,333 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 02:35:59,350 INFO L208 MainTranslator]: Completed translation [2021-10-16 02:35:59,350 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:35:59 WrapperNode [2021-10-16 02:35:59,351 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-16 02:35:59,352 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-16 02:35:59,353 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-16 02:35:59,353 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-16 02:35:59,362 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:35:59" (1/1) ... [2021-10-16 02:35:59,371 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:35:59" (1/1) ... [2021-10-16 02:35:59,392 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-16 02:35:59,393 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-16 02:35:59,393 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-16 02:35:59,394 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-16 02:35:59,404 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:35:59" (1/1) ... [2021-10-16 02:35:59,404 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:35:59" (1/1) ... [2021-10-16 02:35:59,406 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:35:59" (1/1) ... [2021-10-16 02:35:59,408 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:35:59" (1/1) ... [2021-10-16 02:35:59,424 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:35:59" (1/1) ... [2021-10-16 02:35:59,429 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:35:59" (1/1) ... [2021-10-16 02:35:59,436 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:35:59" (1/1) ... [2021-10-16 02:35:59,438 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-16 02:35:59,440 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-16 02:35:59,441 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-16 02:35:59,441 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-16 02:35:59,442 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:35:59" (1/1) ... [2021-10-16 02:35:59,451 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 02:35:59,465 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615f8cba-f3d7-4b4d-8fd4-3802bda4d5f2/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:35:59,487 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615f8cba-f3d7-4b4d-8fd4-3802bda4d5f2/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-16 02:35:59,513 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615f8cba-f3d7-4b4d-8fd4-3802bda4d5f2/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-16 02:35:59,552 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-16 02:35:59,553 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-16 02:35:59,555 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-16 02:35:59,555 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-16 02:35:59,961 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-16 02:35:59,962 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2021-10-16 02:35:59,964 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:35:59 BoogieIcfgContainer [2021-10-16 02:35:59,965 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-16 02:35:59,967 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-16 02:35:59,967 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-16 02:35:59,971 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-16 02:35:59,971 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.10 02:35:58" (1/3) ... [2021-10-16 02:35:59,972 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1786fee8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 02:35:59, skipping insertion in model container [2021-10-16 02:35:59,972 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:35:59" (2/3) ... [2021-10-16 02:35:59,973 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1786fee8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 02:35:59, skipping insertion in model container [2021-10-16 02:35:59,973 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:35:59" (3/3) ... [2021-10-16 02:35:59,975 INFO L111 eAbstractionObserver]: Analyzing ICFG inv_square-1.c [2021-10-16 02:35:59,981 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-16 02:35:59,981 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-16 02:36:00,039 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-16 02:36:00,047 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-16 02:36:00,047 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-16 02:36:00,064 INFO L276 IsEmpty]: Start isEmpty. Operand has 8 states, 6 states have (on average 1.5) internal successors, (9), 7 states have internal predecessors, (9), 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) [2021-10-16 02:36:00,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-16 02:36:00,070 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:36:00,071 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-10-16 02:36:00,072 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:36:00,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:36:00,086 INFO L82 PathProgramCache]: Analyzing trace with hash 1947436, now seen corresponding path program 1 times [2021-10-16 02:36:00,100 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:36:00,103 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900981297] [2021-10-16 02:36:00,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:36:00,105 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:36:00,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-16 02:36:00,277 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-16 02:36:00,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-16 02:36:00,363 INFO L133 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-10-16 02:36:00,367 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-16 02:36:00,368 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-16 02:36:00,372 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-16 02:36:00,379 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-16 02:36:00,405 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.10 02:36:00 BoogieIcfgContainer [2021-10-16 02:36:00,405 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-16 02:36:00,406 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-16 02:36:00,409 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-16 02:36:00,409 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-16 02:36:00,410 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:35:59" (3/4) ... [2021-10-16 02:36:00,414 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-16 02:36:00,414 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-16 02:36:00,420 INFO L168 Benchmark]: Toolchain (without parser) took 1501.19 ms. Allocated memory is still 125.8 MB. Free memory was 90.1 MB in the beginning and 75.5 MB in the end (delta: 14.6 MB). Peak memory consumption was 11.9 MB. Max. memory is 16.1 GB. [2021-10-16 02:36:00,421 INFO L168 Benchmark]: CDTParser took 0.33 ms. Allocated memory is still 125.8 MB. Free memory is still 106.4 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 02:36:00,423 INFO L168 Benchmark]: CACSL2BoogieTranslator took 419.39 ms. Allocated memory is still 125.8 MB. Free memory was 90.0 MB in the beginning and 102.6 MB in the end (delta: -12.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-16 02:36:00,424 INFO L168 Benchmark]: Boogie Procedure Inliner took 40.08 ms. Allocated memory is still 125.8 MB. Free memory was 102.6 MB in the beginning and 101.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-16 02:36:00,426 INFO L168 Benchmark]: Boogie Preprocessor took 45.79 ms. Allocated memory is still 125.8 MB. Free memory was 101.3 MB in the beginning and 100.3 MB in the end (delta: 924.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 02:36:00,427 INFO L168 Benchmark]: RCFGBuilder took 525.31 ms. Allocated memory is still 125.8 MB. Free memory was 100.3 MB in the beginning and 89.3 MB in the end (delta: 11.1 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-10-16 02:36:00,429 INFO L168 Benchmark]: TraceAbstraction took 438.36 ms. Allocated memory is still 125.8 MB. Free memory was 88.7 MB in the beginning and 75.5 MB in the end (delta: 13.2 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-10-16 02:36:00,437 INFO L168 Benchmark]: Witness Printer took 8.60 ms. Allocated memory is still 125.8 MB. Free memory is still 75.5 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 02:36:00,446 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33 ms. Allocated memory is still 125.8 MB. Free memory is still 106.4 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 419.39 ms. Allocated memory is still 125.8 MB. Free memory was 90.0 MB in the beginning and 102.6 MB in the end (delta: -12.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 40.08 ms. Allocated memory is still 125.8 MB. Free memory was 102.6 MB in the beginning and 101.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 45.79 ms. Allocated memory is still 125.8 MB. Free memory was 101.3 MB in the beginning and 100.3 MB in the end (delta: 924.1 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 525.31 ms. Allocated memory is still 125.8 MB. Free memory was 100.3 MB in the beginning and 89.3 MB in the end (delta: 11.1 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 438.36 ms. Allocated memory is still 125.8 MB. Free memory was 88.7 MB in the beginning and 75.5 MB in the end (delta: 13.2 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Witness Printer took 8.60 ms. Allocated memory is still 125.8 MB. Free memory is still 75.5 MB. There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 13]: 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 22, overapproximation of someBinaryArithmeticFLOAToperation at line 23. Possible FailurePath: [L17] float x, y, z; [L19] x = __VERIFIER_nondet_float() [L11] COND FALSE !(!cond) [L22] COND TRUE x != 0.f [L23] y = x * x [L13] COND TRUE !(cond) [L13] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 8 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 341.7ms, OverallIterations: 1, TraceHistogramMax: 1, EmptinessCheckTime: 11.4ms, AutomataDifference: 0.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 10.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=8occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 14.6ms SsaConstructionTime, 76.2ms SatisfiabilityAnalysisTime, 0.0ms 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 [2021-10-16 02:36:00,515 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615f8cba-f3d7-4b4d-8fd4-3802bda4d5f2/bin/utaipan-mTDlp9Zugs/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-5709675 [2021-10-16 02:36:03,465 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-16 02:36:03,468 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-16 02:36:03,531 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-16 02:36:03,531 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-16 02:36:03,537 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-16 02:36:03,539 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-16 02:36:03,549 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-16 02:36:03,553 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-16 02:36:03,562 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-16 02:36:03,564 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-16 02:36:03,565 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-16 02:36:03,566 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-16 02:36:03,567 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-16 02:36:03,569 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-16 02:36:03,579 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-16 02:36:03,582 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-16 02:36:03,584 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-16 02:36:03,586 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-16 02:36:03,596 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-16 02:36:03,599 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-16 02:36:03,603 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-16 02:36:03,612 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-16 02:36:03,614 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-16 02:36:03,618 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-16 02:36:03,618 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-16 02:36:03,619 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-16 02:36:03,620 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-16 02:36:03,621 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-16 02:36:03,622 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-16 02:36:03,623 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-16 02:36:03,630 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-16 02:36:03,632 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-16 02:36:03,633 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-16 02:36:03,635 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-16 02:36:03,635 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-16 02:36:03,637 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-16 02:36:03,637 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-16 02:36:03,637 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-16 02:36:03,640 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-16 02:36:03,641 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-16 02:36:03,642 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615f8cba-f3d7-4b4d-8fd4-3802bda4d5f2/bin/utaipan-mTDlp9Zugs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-10-16 02:36:03,683 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-16 02:36:03,684 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-16 02:36:03,685 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-16 02:36:03,685 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-16 02:36:03,686 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-16 02:36:03,686 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-16 02:36:03,686 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-16 02:36:03,687 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-16 02:36:03,687 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-16 02:36:03,688 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-16 02:36:03,688 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-16 02:36:03,689 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-16 02:36:03,689 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-16 02:36:03,689 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-16 02:36:03,689 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-16 02:36:03,690 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-16 02:36:03,690 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-16 02:36:03,690 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-16 02:36:03,691 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-16 02:36:03,691 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-16 02:36:03,691 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-16 02:36:03,691 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-16 02:36:03,692 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-16 02:36:03,692 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-16 02:36:03,692 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-16 02:36:03,693 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-16 02:36:03,693 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 02:36:03,693 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-16 02:36:03,694 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-16 02:36:03,694 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-16 02:36:03,694 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-10-16 02:36:03,695 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-16 02:36:03,695 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-16 02:36:03,695 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-16 02:36:03,695 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-16 02:36:03,696 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_615f8cba-f3d7-4b4d-8fd4-3802bda4d5f2/bin/utaipan-mTDlp9Zugs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615f8cba-f3d7-4b4d-8fd4-3802bda4d5f2/bin/utaipan-mTDlp9Zugs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 53d53b1526e829d58326d87a7aff591d9debe20f [2021-10-16 02:36:04,111 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-16 02:36:04,137 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-16 02:36:04,140 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-16 02:36:04,142 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-16 02:36:04,143 INFO L275 PluginConnector]: CDTParser initialized [2021-10-16 02:36:04,144 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615f8cba-f3d7-4b4d-8fd4-3802bda4d5f2/bin/utaipan-mTDlp9Zugs/../../sv-benchmarks/c/float-benchs/inv_square-1.c [2021-10-16 02:36:04,229 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615f8cba-f3d7-4b4d-8fd4-3802bda4d5f2/bin/utaipan-mTDlp9Zugs/data/cfc736ee4/54f798f2a4d745e1ba9d2ccbba5e7635/FLAGeca3777c3 [2021-10-16 02:36:04,817 INFO L306 CDTParser]: Found 1 translation units. [2021-10-16 02:36:04,818 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615f8cba-f3d7-4b4d-8fd4-3802bda4d5f2/sv-benchmarks/c/float-benchs/inv_square-1.c [2021-10-16 02:36:04,826 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615f8cba-f3d7-4b4d-8fd4-3802bda4d5f2/bin/utaipan-mTDlp9Zugs/data/cfc736ee4/54f798f2a4d745e1ba9d2ccbba5e7635/FLAGeca3777c3 [2021-10-16 02:36:05,196 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615f8cba-f3d7-4b4d-8fd4-3802bda4d5f2/bin/utaipan-mTDlp9Zugs/data/cfc736ee4/54f798f2a4d745e1ba9d2ccbba5e7635 [2021-10-16 02:36:05,203 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-16 02:36:05,206 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-16 02:36:05,208 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-16 02:36:05,209 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-16 02:36:05,213 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-16 02:36:05,214 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:36:05" (1/1) ... [2021-10-16 02:36:05,216 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@52e5e6d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:36:05, skipping insertion in model container [2021-10-16 02:36:05,217 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:36:05" (1/1) ... [2021-10-16 02:36:05,227 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-16 02:36:05,245 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-16 02:36:05,479 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_615f8cba-f3d7-4b4d-8fd4-3802bda4d5f2/sv-benchmarks/c/float-benchs/inv_square-1.c[487,500] [2021-10-16 02:36:05,502 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 02:36:05,530 INFO L203 MainTranslator]: Completed pre-run [2021-10-16 02:36:05,551 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_615f8cba-f3d7-4b4d-8fd4-3802bda4d5f2/sv-benchmarks/c/float-benchs/inv_square-1.c[487,500] [2021-10-16 02:36:05,559 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 02:36:05,581 INFO L208 MainTranslator]: Completed translation [2021-10-16 02:36:05,581 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:36:05 WrapperNode [2021-10-16 02:36:05,581 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-16 02:36:05,585 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-16 02:36:05,585 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-16 02:36:05,585 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-16 02:36:05,611 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:36:05" (1/1) ... [2021-10-16 02:36:05,632 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:36:05" (1/1) ... [2021-10-16 02:36:05,686 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-16 02:36:05,690 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-16 02:36:05,690 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-16 02:36:05,690 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-16 02:36:05,700 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:36:05" (1/1) ... [2021-10-16 02:36:05,700 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:36:05" (1/1) ... [2021-10-16 02:36:05,718 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:36:05" (1/1) ... [2021-10-16 02:36:05,718 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:36:05" (1/1) ... [2021-10-16 02:36:05,726 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:36:05" (1/1) ... [2021-10-16 02:36:05,734 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:36:05" (1/1) ... [2021-10-16 02:36:05,742 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:36:05" (1/1) ... [2021-10-16 02:36:05,746 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-16 02:36:05,747 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-16 02:36:05,747 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-16 02:36:05,747 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-16 02:36:05,748 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:36:05" (1/1) ... [2021-10-16 02:36:05,757 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 02:36:05,770 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615f8cba-f3d7-4b4d-8fd4-3802bda4d5f2/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:36:05,783 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615f8cba-f3d7-4b4d-8fd4-3802bda4d5f2/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-16 02:36:05,803 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615f8cba-f3d7-4b4d-8fd4-3802bda4d5f2/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-16 02:36:05,841 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-16 02:36:05,841 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-16 02:36:05,841 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-16 02:36:05,842 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-16 02:36:07,005 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-16 02:36:07,005 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2021-10-16 02:36:07,007 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:36:07 BoogieIcfgContainer [2021-10-16 02:36:07,008 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-16 02:36:07,010 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-16 02:36:07,010 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-16 02:36:07,015 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-16 02:36:07,015 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.10 02:36:05" (1/3) ... [2021-10-16 02:36:07,016 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2245f9e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 02:36:07, skipping insertion in model container [2021-10-16 02:36:07,017 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:36:05" (2/3) ... [2021-10-16 02:36:07,017 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2245f9e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 02:36:07, skipping insertion in model container [2021-10-16 02:36:07,018 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:36:07" (3/3) ... [2021-10-16 02:36:07,019 INFO L111 eAbstractionObserver]: Analyzing ICFG inv_square-1.c [2021-10-16 02:36:07,026 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-16 02:36:07,026 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-16 02:36:07,085 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-16 02:36:07,094 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-16 02:36:07,095 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-16 02:36:07,111 INFO L276 IsEmpty]: Start isEmpty. Operand has 12 states, 10 states have (on average 1.4) internal successors, (14), 11 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) [2021-10-16 02:36:07,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-16 02:36:07,117 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:36:07,118 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-16 02:36:07,119 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:36:07,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:36:07,126 INFO L82 PathProgramCache]: Analyzing trace with hash 889510699, now seen corresponding path program 1 times [2021-10-16 02:36:07,141 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:36:07,142 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [818244593] [2021-10-16 02:36:07,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:36:07,144 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:36:07,144 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615f8cba-f3d7-4b4d-8fd4-3802bda4d5f2/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:36:07,152 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615f8cba-f3d7-4b4d-8fd4-3802bda4d5f2/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:36:07,182 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615f8cba-f3d7-4b4d-8fd4-3802bda4d5f2/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-16 02:36:07,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:36:07,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 1 conjunts are in the unsatisfiable core [2021-10-16 02:36:07,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:36:07,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:36:07,364 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:36:07,419 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:36:07,420 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:36:07,420 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [818244593] [2021-10-16 02:36:07,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [818244593] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:36:07,422 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:36:07,422 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-16 02:36:07,424 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876974111] [2021-10-16 02:36:07,430 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-16 02:36:07,430 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:36:07,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-16 02:36:07,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-16 02:36:07,454 INFO L87 Difference]: Start difference. First operand has 12 states, 10 states have (on average 1.4) internal successors, (14), 11 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) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 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) [2021-10-16 02:36:07,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:36:07,470 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2021-10-16 02:36:07,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-16 02:36:07,472 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 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 6 [2021-10-16 02:36:07,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:36:07,482 INFO L225 Difference]: With dead ends: 21 [2021-10-16 02:36:07,482 INFO L226 Difference]: Without dead ends: 7 [2021-10-16 02:36:07,485 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-16 02:36:07,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2021-10-16 02:36:07,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2021-10-16 02:36:07,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7 states, 6 states have (on average 1.0) internal successors, (6), 6 states have internal predecessors, (6), 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) [2021-10-16 02:36:07,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 6 transitions. [2021-10-16 02:36:07,520 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 6 transitions. Word has length 6 [2021-10-16 02:36:07,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:36:07,521 INFO L470 AbstractCegarLoop]: Abstraction has 7 states and 6 transitions. [2021-10-16 02:36:07,522 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 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) [2021-10-16 02:36:07,522 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 6 transitions. [2021-10-16 02:36:07,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-16 02:36:07,523 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:36:07,523 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-16 02:36:07,546 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615f8cba-f3d7-4b4d-8fd4-3802bda4d5f2/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-16 02:36:07,739 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615f8cba-f3d7-4b4d-8fd4-3802bda4d5f2/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:36:07,740 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:36:07,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:36:07,741 INFO L82 PathProgramCache]: Analyzing trace with hash 889570281, now seen corresponding path program 1 times [2021-10-16 02:36:07,742 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:36:07,742 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [173062460] [2021-10-16 02:36:07,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:36:07,743 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:36:07,743 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615f8cba-f3d7-4b4d-8fd4-3802bda4d5f2/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:36:07,744 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615f8cba-f3d7-4b4d-8fd4-3802bda4d5f2/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:36:07,758 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615f8cba-f3d7-4b4d-8fd4-3802bda4d5f2/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-16 02:36:07,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-16 02:36:07,882 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-16 02:36:07,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-16 02:36:08,009 INFO L133 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2021-10-16 02:36:08,010 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-16 02:36:08,012 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-16 02:36:08,048 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615f8cba-f3d7-4b4d-8fd4-3802bda4d5f2/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-16 02:36:08,215 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615f8cba-f3d7-4b4d-8fd4-3802bda4d5f2/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:36:08,221 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-16 02:36:08,244 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.10 02:36:08 BoogieIcfgContainer [2021-10-16 02:36:08,245 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-16 02:36:08,245 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-16 02:36:08,246 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-16 02:36:08,246 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-16 02:36:08,247 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:36:07" (3/4) ... [2021-10-16 02:36:08,249 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-16 02:36:08,293 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615f8cba-f3d7-4b4d-8fd4-3802bda4d5f2/bin/utaipan-mTDlp9Zugs/witness.graphml [2021-10-16 02:36:08,293 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-16 02:36:08,296 INFO L168 Benchmark]: Toolchain (without parser) took 3088.83 ms. Allocated memory is still 73.4 MB. Free memory was 52.2 MB in the beginning and 43.5 MB in the end (delta: 8.7 MB). Peak memory consumption was 9.0 MB. Max. memory is 16.1 GB. [2021-10-16 02:36:08,296 INFO L168 Benchmark]: CDTParser took 0.30 ms. Allocated memory is still 50.3 MB. Free memory is still 30.4 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 02:36:08,297 INFO L168 Benchmark]: CACSL2BoogieTranslator took 373.44 ms. Allocated memory is still 73.4 MB. Free memory was 52.0 MB in the beginning and 42.1 MB in the end (delta: 9.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-16 02:36:08,298 INFO L168 Benchmark]: Boogie Procedure Inliner took 103.79 ms. Allocated memory is still 73.4 MB. Free memory was 41.9 MB in the beginning and 57.0 MB in the end (delta: -15.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-16 02:36:08,298 INFO L168 Benchmark]: Boogie Preprocessor took 56.16 ms. Allocated memory is still 73.4 MB. Free memory was 57.0 MB in the beginning and 55.9 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 02:36:08,299 INFO L168 Benchmark]: RCFGBuilder took 1261.19 ms. Allocated memory is still 73.4 MB. Free memory was 55.6 MB in the beginning and 46.5 MB in the end (delta: 9.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-16 02:36:08,300 INFO L168 Benchmark]: TraceAbstraction took 1234.59 ms. Allocated memory is still 73.4 MB. Free memory was 46.3 MB in the beginning and 45.2 MB in the end (delta: 1.0 MB). Peak memory consumption was 3.8 MB. Max. memory is 16.1 GB. [2021-10-16 02:36:08,301 INFO L168 Benchmark]: Witness Printer took 47.81 ms. Allocated memory is still 73.4 MB. Free memory was 45.2 MB in the beginning and 43.5 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-16 02:36:08,305 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30 ms. Allocated memory is still 50.3 MB. Free memory is still 30.4 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 373.44 ms. Allocated memory is still 73.4 MB. Free memory was 52.0 MB in the beginning and 42.1 MB in the end (delta: 9.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 103.79 ms. Allocated memory is still 73.4 MB. Free memory was 41.9 MB in the beginning and 57.0 MB in the end (delta: -15.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 56.16 ms. Allocated memory is still 73.4 MB. Free memory was 57.0 MB in the beginning and 55.9 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 1261.19 ms. Allocated memory is still 73.4 MB. Free memory was 55.6 MB in the beginning and 46.5 MB in the end (delta: 9.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1234.59 ms. Allocated memory is still 73.4 MB. Free memory was 46.3 MB in the beginning and 45.2 MB in the end (delta: 1.0 MB). Peak memory consumption was 3.8 MB. Max. memory is 16.1 GB. * Witness Printer took 47.81 ms. Allocated memory is still 73.4 MB. Free memory was 45.2 MB in the beginning and 43.5 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 13]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L17] float x, y, z; [L19] x = __VERIFIER_nondet_float() [L11] COND FALSE !(!cond) [L22] COND TRUE x != 0.f [L23] y = x * x [L13] COND TRUE !(cond) [L13] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 12 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 1136.8ms, OverallIterations: 2, TraceHistogramMax: 1, EmptinessCheckTime: 11.1ms, AutomataDifference: 54.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 11.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 12 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=12occurred in iteration=0, InterpolantAutomatonStates: 2, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 17.6ms AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 22.1ms SsaConstructionTime, 189.6ms SatisfiabilityAnalysisTime, 120.2ms InterpolantComputationTime, 12 NumberOfCodeBlocks, 12 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 10 ConstructedInterpolants, 0 QuantifiedInterpolants, 10 SizeOfPredicates, 0 NumberOfNonLiveVariables, 32 ConjunctsInSsa, 1 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 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! [2021-10-16 02:36:08,367 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615f8cba-f3d7-4b4d-8fd4-3802bda4d5f2/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...