./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-floats-scientific-comp/loop1-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d0b13ae-7cb4-4662-878e-0a62c565b8b5/bin/utaipan-WLngWcDbfI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d0b13ae-7cb4-4662-878e-0a62c565b8b5/bin/utaipan-WLngWcDbfI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d0b13ae-7cb4-4662-878e-0a62c565b8b5/bin/utaipan-WLngWcDbfI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d0b13ae-7cb4-4662-878e-0a62c565b8b5/bin/utaipan-WLngWcDbfI/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-floats-scientific-comp/loop1-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d0b13ae-7cb4-4662-878e-0a62c565b8b5/bin/utaipan-WLngWcDbfI/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d0b13ae-7cb4-4662-878e-0a62c565b8b5/bin/utaipan-WLngWcDbfI --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 a0e23aa9bbb10ea2680f8206f9d74b19166b1199 .............................................................................................................................................................................................................................................................................................. 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_9d0b13ae-7cb4-4662-878e-0a62c565b8b5/bin/utaipan-WLngWcDbfI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d0b13ae-7cb4-4662-878e-0a62c565b8b5/bin/utaipan-WLngWcDbfI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d0b13ae-7cb4-4662-878e-0a62c565b8b5/bin/utaipan-WLngWcDbfI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d0b13ae-7cb4-4662-878e-0a62c565b8b5/bin/utaipan-WLngWcDbfI/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-floats-scientific-comp/loop1-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d0b13ae-7cb4-4662-878e-0a62c565b8b5/bin/utaipan-WLngWcDbfI/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d0b13ae-7cb4-4662-878e-0a62c565b8b5/bin/utaipan-WLngWcDbfI --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 a0e23aa9bbb10ea2680f8206f9d74b19166b1199 ................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.0-7b2dab5 [2021-10-11 02:29:33,184 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-11 02:29:33,187 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-11 02:29:33,250 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-11 02:29:33,250 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-11 02:29:33,256 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-11 02:29:33,258 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-11 02:29:33,262 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-11 02:29:33,264 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-11 02:29:33,270 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-11 02:29:33,272 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-11 02:29:33,273 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-11 02:29:33,273 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-11 02:29:33,276 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-11 02:29:33,278 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-11 02:29:33,280 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-11 02:29:33,282 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-11 02:29:33,285 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-11 02:29:33,288 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-11 02:29:33,303 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-11 02:29:33,305 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-11 02:29:33,307 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-11 02:29:33,310 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-11 02:29:33,311 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-11 02:29:33,320 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-11 02:29:33,320 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-11 02:29:33,321 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-11 02:29:33,323 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-11 02:29:33,324 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-11 02:29:33,325 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-11 02:29:33,326 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-11 02:29:33,327 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-11 02:29:33,329 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-11 02:29:33,330 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-11 02:29:33,332 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-11 02:29:33,332 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-11 02:29:33,333 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-11 02:29:33,334 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-11 02:29:33,334 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-11 02:29:33,335 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-11 02:29:33,336 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-11 02:29:33,338 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d0b13ae-7cb4-4662-878e-0a62c565b8b5/bin/utaipan-WLngWcDbfI/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-11 02:29:33,379 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-11 02:29:33,380 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-11 02:29:33,381 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-11 02:29:33,382 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-11 02:29:33,382 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-11 02:29:33,382 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-11 02:29:33,382 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-11 02:29:33,382 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-11 02:29:33,389 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-11 02:29:33,389 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-11 02:29:33,390 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-11 02:29:33,391 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-11 02:29:33,391 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-11 02:29:33,391 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-11 02:29:33,391 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-11 02:29:33,392 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-11 02:29:33,392 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-11 02:29:33,392 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-11 02:29:33,393 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-11 02:29:33,393 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-11 02:29:33,393 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-11 02:29:33,393 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-11 02:29:33,393 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-11 02:29:33,394 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-11 02:29:33,394 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-11 02:29:33,394 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-11 02:29:33,394 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-11 02:29:33,395 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-11 02:29:33,395 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-11 02:29:33,396 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-11 02:29:33,397 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-11 02:29:33,397 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-11 02:29:33,397 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-11 02:29:33,398 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-11 02:29:33,398 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-11 02:29:33,398 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-11 02:29:33,398 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-11 02:29:33,398 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-11 02:29:33,399 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-11 02:29:33,399 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_9d0b13ae-7cb4-4662-878e-0a62c565b8b5/bin/utaipan-WLngWcDbfI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d0b13ae-7cb4-4662-878e-0a62c565b8b5/bin/utaipan-WLngWcDbfI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a0e23aa9bbb10ea2680f8206f9d74b19166b1199 [2021-10-11 02:29:33,658 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-11 02:29:33,685 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-11 02:29:33,689 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-11 02:29:33,690 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-11 02:29:33,691 INFO L275 PluginConnector]: CDTParser initialized [2021-10-11 02:29:33,692 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d0b13ae-7cb4-4662-878e-0a62c565b8b5/bin/utaipan-WLngWcDbfI/../../sv-benchmarks/c/loop-floats-scientific-comp/loop1-2.c [2021-10-11 02:29:33,766 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d0b13ae-7cb4-4662-878e-0a62c565b8b5/bin/utaipan-WLngWcDbfI/data/bc2a69b91/96514007ebad41fd8730bd638a4e41f2/FLAG01393d702 [2021-10-11 02:29:34,341 INFO L306 CDTParser]: Found 1 translation units. [2021-10-11 02:29:34,342 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d0b13ae-7cb4-4662-878e-0a62c565b8b5/sv-benchmarks/c/loop-floats-scientific-comp/loop1-2.c [2021-10-11 02:29:34,354 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d0b13ae-7cb4-4662-878e-0a62c565b8b5/bin/utaipan-WLngWcDbfI/data/bc2a69b91/96514007ebad41fd8730bd638a4e41f2/FLAG01393d702 [2021-10-11 02:29:34,718 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d0b13ae-7cb4-4662-878e-0a62c565b8b5/bin/utaipan-WLngWcDbfI/data/bc2a69b91/96514007ebad41fd8730bd638a4e41f2 [2021-10-11 02:29:34,724 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-11 02:29:34,725 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-11 02:29:34,727 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-11 02:29:34,727 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-11 02:29:34,740 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-11 02:29:34,741 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:29:34" (1/1) ... [2021-10-11 02:29:34,743 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@45b9c97f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:29:34, skipping insertion in model container [2021-10-11 02:29:34,743 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:29:34" (1/1) ... [2021-10-11 02:29:34,751 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-11 02:29:34,764 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-11 02:29:34,900 WARN L226 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_9d0b13ae-7cb4-4662-878e-0a62c565b8b5/sv-benchmarks/c/loop-floats-scientific-comp/loop1-2.c[538,551] [2021-10-11 02:29:34,915 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:29:34,925 INFO L203 MainTranslator]: Completed pre-run [2021-10-11 02:29:34,937 WARN L226 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_9d0b13ae-7cb4-4662-878e-0a62c565b8b5/sv-benchmarks/c/loop-floats-scientific-comp/loop1-2.c[538,551] [2021-10-11 02:29:34,942 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:29:34,957 INFO L208 MainTranslator]: Completed translation [2021-10-11 02:29:34,957 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:29:34 WrapperNode [2021-10-11 02:29:34,957 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-11 02:29:34,959 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-11 02:29:34,959 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-11 02:29:34,959 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-11 02:29:34,967 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:29:34" (1/1) ... [2021-10-11 02:29:34,975 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:29:34" (1/1) ... [2021-10-11 02:29:34,994 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-11 02:29:34,996 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-11 02:29:34,996 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-11 02:29:34,997 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-11 02:29:35,005 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:29:34" (1/1) ... [2021-10-11 02:29:35,005 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:29:34" (1/1) ... [2021-10-11 02:29:35,016 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:29:34" (1/1) ... [2021-10-11 02:29:35,017 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:29:34" (1/1) ... [2021-10-11 02:29:35,022 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:29:34" (1/1) ... [2021-10-11 02:29:35,026 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:29:34" (1/1) ... [2021-10-11 02:29:35,027 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:29:34" (1/1) ... [2021-10-11 02:29:35,030 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-11 02:29:35,031 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-11 02:29:35,034 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-11 02:29:35,034 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-11 02:29:35,035 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:29:34" (1/1) ... No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d0b13ae-7cb4-4662-878e-0a62c565b8b5/bin/utaipan-WLngWcDbfI/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-11 02:29:35,124 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-11 02:29:35,125 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-11 02:29:35,125 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-11 02:29:35,125 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-11 02:29:35,470 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-11 02:29:35,471 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-10-11 02:29:35,473 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:29:35 BoogieIcfgContainer [2021-10-11 02:29:35,474 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-11 02:29:35,475 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-11 02:29:35,475 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-11 02:29:35,479 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-11 02:29:35,479 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 02:29:34" (1/3) ... [2021-10-11 02:29:35,480 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7bb3473d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:29:35, skipping insertion in model container [2021-10-11 02:29:35,480 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:29:34" (2/3) ... [2021-10-11 02:29:35,481 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7bb3473d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:29:35, skipping insertion in model container [2021-10-11 02:29:35,481 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:29:35" (3/3) ... [2021-10-11 02:29:35,482 INFO L111 eAbstractionObserver]: Analyzing ICFG loop1-2.c [2021-10-11 02:29:35,496 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-11 02:29:35,499 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-10-11 02:29:35,510 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-11 02:29:35,565 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-10-11 02:29:35,577 INFO L378 AbstractCegarLoop]: Hoare is true [2021-10-11 02:29:35,577 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-10-11 02:29:35,577 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-10-11 02:29:35,577 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-10-11 02:29:35,578 INFO L382 AbstractCegarLoop]: Difference is false [2021-10-11 02:29:35,578 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-10-11 02:29:35,578 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-10-11 02:29:35,590 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states. [2021-10-11 02:29:35,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-11 02:29:35,599 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:29:35,600 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-11 02:29:35,601 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:29:35,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:29:35,608 INFO L82 PathProgramCache]: Analyzing trace with hash 61151090, now seen corresponding path program 1 times [2021-10-11 02:29:35,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:29:35,618 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542683030] [2021-10-11 02:29:35,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:29:35,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:29:35,815 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:29:35,817 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542683030] [2021-10-11 02:29:35,818 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:29:35,818 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-11 02:29:35,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529470655] [2021-10-11 02:29:35,824 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-10-11 02:29:35,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:29:35,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-11 02:29:35,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-11 02:29:35,845 INFO L87 Difference]: Start difference. First operand 9 states. Second operand 2 states. [2021-10-11 02:29:35,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:29:35,862 INFO L93 Difference]: Finished difference Result 15 states and 17 transitions. [2021-10-11 02:29:35,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-11 02:29:35,863 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 5 [2021-10-11 02:29:35,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:29:35,880 INFO L225 Difference]: With dead ends: 15 [2021-10-11 02:29:35,883 INFO L226 Difference]: Without dead ends: 7 [2021-10-11 02:29:35,887 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-11 02:29:35,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2021-10-11 02:29:35,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2021-10-11 02:29:35,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-10-11 02:29:35,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2021-10-11 02:29:35,917 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 5 [2021-10-11 02:29:35,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:29:35,917 INFO L481 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2021-10-11 02:29:35,917 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2021-10-11 02:29:35,918 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2021-10-11 02:29:35,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-11 02:29:35,918 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:29:35,918 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-11 02:29:35,919 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-11 02:29:35,919 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:29:35,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:29:35,923 INFO L82 PathProgramCache]: Analyzing trace with hash 1871490578, now seen corresponding path program 1 times [2021-10-11 02:29:35,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:29:35,924 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177693632] [2021-10-11 02:29:35,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:29:35,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-11 02:29:35,977 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-11 02:29:36,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-11 02:29:36,019 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-11 02:29:36,047 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-10-11 02:29:36,048 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-10-11 02:29:36,050 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-11 02:29:36,082 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.10 02:29:36 BoogieIcfgContainer [2021-10-11 02:29:36,082 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-11 02:29:36,083 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-11 02:29:36,083 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-11 02:29:36,083 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-11 02:29:36,084 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:29:35" (3/4) ... [2021-10-11 02:29:36,087 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-11 02:29:36,087 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-11 02:29:36,091 INFO L168 Benchmark]: Toolchain (without parser) took 1363.67 ms. Allocated memory is still 117.4 MB. Free memory was 90.1 MB in the beginning and 86.2 MB in the end (delta: 3.9 MB). Peak memory consumption was 5.3 MB. Max. memory is 16.1 GB. [2021-10-11 02:29:36,092 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 86.0 MB. Free memory was 54.6 MB in the beginning and 54.6 MB in the end (delta: 41.9 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:29:36,094 INFO L168 Benchmark]: CACSL2BoogieTranslator took 230.88 ms. Allocated memory is still 117.4 MB. Free memory was 89.9 MB in the beginning and 80.0 MB in the end (delta: 9.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-11 02:29:36,095 INFO L168 Benchmark]: Boogie Procedure Inliner took 35.96 ms. Allocated memory is still 117.4 MB. Free memory was 80.0 MB in the beginning and 78.7 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-11 02:29:36,097 INFO L168 Benchmark]: Boogie Preprocessor took 34.40 ms. Allocated memory is still 117.4 MB. Free memory was 78.7 MB in the beginning and 77.5 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:29:36,098 INFO L168 Benchmark]: RCFGBuilder took 442.37 ms. Allocated memory is still 117.4 MB. Free memory was 77.5 MB in the beginning and 64.0 MB in the end (delta: 13.5 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-10-11 02:29:36,099 INFO L168 Benchmark]: TraceAbstraction took 607.07 ms. Allocated memory is still 117.4 MB. Free memory was 63.5 MB in the beginning and 86.6 MB in the end (delta: -23.1 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:29:36,101 INFO L168 Benchmark]: Witness Printer took 5.16 ms. Allocated memory is still 117.4 MB. Free memory was 86.6 MB in the beginning and 86.2 MB in the end (delta: 443.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:29:36,110 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 86.0 MB. Free memory was 54.6 MB in the beginning and 54.6 MB in the end (delta: 41.9 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 230.88 ms. Allocated memory is still 117.4 MB. Free memory was 89.9 MB in the beginning and 80.0 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 35.96 ms. Allocated memory is still 117.4 MB. Free memory was 80.0 MB in the beginning and 78.7 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 34.40 ms. Allocated memory is still 117.4 MB. Free memory was 78.7 MB in the beginning and 77.5 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 442.37 ms. Allocated memory is still 117.4 MB. Free memory was 77.5 MB in the beginning and 64.0 MB in the end (delta: 13.5 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 607.07 ms. Allocated memory is still 117.4 MB. Free memory was 63.5 MB in the beginning and 86.6 MB in the end (delta: -23.1 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 5.16 ms. Allocated memory is still 117.4 MB. Free memory was 86.6 MB in the beginning and 86.2 MB in the end (delta: 443.1 kB). There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 14]: 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 37, overapproximation of someBinaryArithmeticFLOAToperation at line 29. Possible FailurePath: [L20] float x = __VERIFIER_nondet_float() ; [L21] float exp = 1.0 ; [L22] float term = 1.0 ; [L23] unsigned int count = 1 ; [L24] float result = 2*(1/(1-x)) ; [L25] int temp ; [L27] COND TRUE 1 [L29] term = term * (x/count) [L30] exp = exp + term [L31] count++ [L33] temp = __VERIFIER_nondet_int() [L34] COND TRUE temp ==0 [L14] COND TRUE !(cond) [L14] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 9 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.4s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 9 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=9occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 11 NumberOfCodeBlocks, 11 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 4 ConstructedInterpolants, 0 QuantifiedInterpolants, 16 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.0-7b2dab5 [2021-10-11 02:29:38,557 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-11 02:29:38,559 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-11 02:29:38,592 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-11 02:29:38,593 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-11 02:29:38,598 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-11 02:29:38,601 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-11 02:29:38,605 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-11 02:29:38,608 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-11 02:29:38,614 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-11 02:29:38,618 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-11 02:29:38,619 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-11 02:29:38,620 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-11 02:29:38,623 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-11 02:29:38,624 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-11 02:29:38,626 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-11 02:29:38,628 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-11 02:29:38,631 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-11 02:29:38,634 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-11 02:29:38,641 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-11 02:29:38,644 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-11 02:29:38,645 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-11 02:29:38,648 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-11 02:29:38,650 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-11 02:29:38,659 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-11 02:29:38,659 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-11 02:29:38,660 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-11 02:29:38,662 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-11 02:29:38,662 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-11 02:29:38,664 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-11 02:29:38,664 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-11 02:29:38,665 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-11 02:29:38,667 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-11 02:29:38,668 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-11 02:29:38,669 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-11 02:29:38,669 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-11 02:29:38,670 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-11 02:29:38,671 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-11 02:29:38,671 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-11 02:29:38,673 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-11 02:29:38,674 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-11 02:29:38,674 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d0b13ae-7cb4-4662-878e-0a62c565b8b5/bin/utaipan-WLngWcDbfI/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-10-11 02:29:38,720 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-11 02:29:38,720 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-11 02:29:38,722 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-11 02:29:38,722 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-11 02:29:38,722 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-11 02:29:38,722 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-11 02:29:38,723 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-11 02:29:38,723 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-11 02:29:38,723 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-11 02:29:38,725 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-11 02:29:38,726 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-11 02:29:38,726 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-11 02:29:38,726 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-11 02:29:38,727 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-11 02:29:38,727 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-11 02:29:38,727 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-11 02:29:38,727 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-11 02:29:38,728 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-11 02:29:38,728 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-11 02:29:38,728 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-11 02:29:38,728 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-11 02:29:38,729 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-11 02:29:38,729 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-11 02:29:38,729 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-11 02:29:38,729 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-11 02:29:38,730 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-11 02:29:38,730 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-11 02:29:38,730 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-11 02:29:38,730 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-11 02:29:38,731 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-11 02:29:38,731 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-10-11 02:29:38,731 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-11 02:29:38,731 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-11 02:29:38,732 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-11 02:29:38,732 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-11 02:29:38,732 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_9d0b13ae-7cb4-4662-878e-0a62c565b8b5/bin/utaipan-WLngWcDbfI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d0b13ae-7cb4-4662-878e-0a62c565b8b5/bin/utaipan-WLngWcDbfI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a0e23aa9bbb10ea2680f8206f9d74b19166b1199 [2021-10-11 02:29:39,160 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-11 02:29:39,196 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-11 02:29:39,198 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-11 02:29:39,200 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-11 02:29:39,203 INFO L275 PluginConnector]: CDTParser initialized [2021-10-11 02:29:39,206 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d0b13ae-7cb4-4662-878e-0a62c565b8b5/bin/utaipan-WLngWcDbfI/../../sv-benchmarks/c/loop-floats-scientific-comp/loop1-2.c [2021-10-11 02:29:39,281 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d0b13ae-7cb4-4662-878e-0a62c565b8b5/bin/utaipan-WLngWcDbfI/data/f55c06a69/9c813ff6e4ce47e2871ceddb9b482085/FLAG3220af697 [2021-10-11 02:29:39,866 INFO L306 CDTParser]: Found 1 translation units. [2021-10-11 02:29:39,867 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d0b13ae-7cb4-4662-878e-0a62c565b8b5/sv-benchmarks/c/loop-floats-scientific-comp/loop1-2.c [2021-10-11 02:29:39,873 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d0b13ae-7cb4-4662-878e-0a62c565b8b5/bin/utaipan-WLngWcDbfI/data/f55c06a69/9c813ff6e4ce47e2871ceddb9b482085/FLAG3220af697 [2021-10-11 02:29:40,227 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d0b13ae-7cb4-4662-878e-0a62c565b8b5/bin/utaipan-WLngWcDbfI/data/f55c06a69/9c813ff6e4ce47e2871ceddb9b482085 [2021-10-11 02:29:40,230 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-11 02:29:40,232 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-11 02:29:40,233 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-11 02:29:40,233 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-11 02:29:40,237 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-11 02:29:40,238 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:29:40" (1/1) ... [2021-10-11 02:29:40,240 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@63162894 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:29:40, skipping insertion in model container [2021-10-11 02:29:40,240 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:29:40" (1/1) ... [2021-10-11 02:29:40,248 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-11 02:29:40,261 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-11 02:29:40,397 WARN L226 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_9d0b13ae-7cb4-4662-878e-0a62c565b8b5/sv-benchmarks/c/loop-floats-scientific-comp/loop1-2.c[538,551] [2021-10-11 02:29:40,412 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:29:40,425 INFO L203 MainTranslator]: Completed pre-run [2021-10-11 02:29:40,439 WARN L226 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_9d0b13ae-7cb4-4662-878e-0a62c565b8b5/sv-benchmarks/c/loop-floats-scientific-comp/loop1-2.c[538,551] [2021-10-11 02:29:40,444 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:29:40,460 INFO L208 MainTranslator]: Completed translation [2021-10-11 02:29:40,460 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:29:40 WrapperNode [2021-10-11 02:29:40,460 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-11 02:29:40,461 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-11 02:29:40,462 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-11 02:29:40,462 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-11 02:29:40,469 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:29:40" (1/1) ... [2021-10-11 02:29:40,478 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:29:40" (1/1) ... [2021-10-11 02:29:40,511 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-11 02:29:40,512 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-11 02:29:40,512 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-11 02:29:40,512 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-11 02:29:40,520 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:29:40" (1/1) ... [2021-10-11 02:29:40,541 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:29:40" (1/1) ... [2021-10-11 02:29:40,560 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:29:40" (1/1) ... [2021-10-11 02:29:40,560 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:29:40" (1/1) ... [2021-10-11 02:29:40,568 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:29:40" (1/1) ... [2021-10-11 02:29:40,572 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:29:40" (1/1) ... [2021-10-11 02:29:40,574 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:29:40" (1/1) ... [2021-10-11 02:29:40,577 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-11 02:29:40,589 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-11 02:29:40,589 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-11 02:29:40,589 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-11 02:29:40,590 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:29:40" (1/1) ... No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d0b13ae-7cb4-4662-878e-0a62c565b8b5/bin/utaipan-WLngWcDbfI/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-11 02:29:40,667 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-11 02:29:40,670 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-11 02:29:40,670 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-11 02:29:40,670 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-11 02:29:45,001 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-11 02:29:45,001 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-10-11 02:29:45,003 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:29:45 BoogieIcfgContainer [2021-10-11 02:29:45,003 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-11 02:29:45,005 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-11 02:29:45,005 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-11 02:29:45,008 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-11 02:29:45,009 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 02:29:40" (1/3) ... [2021-10-11 02:29:45,009 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ceeaf44 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:29:45, skipping insertion in model container [2021-10-11 02:29:45,010 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:29:40" (2/3) ... [2021-10-11 02:29:45,010 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ceeaf44 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:29:45, skipping insertion in model container [2021-10-11 02:29:45,010 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:29:45" (3/3) ... [2021-10-11 02:29:45,012 INFO L111 eAbstractionObserver]: Analyzing ICFG loop1-2.c [2021-10-11 02:29:45,030 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-11 02:29:45,033 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-10-11 02:29:45,046 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-11 02:29:45,072 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-10-11 02:29:45,072 INFO L378 AbstractCegarLoop]: Hoare is true [2021-10-11 02:29:45,072 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-10-11 02:29:45,073 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-10-11 02:29:45,073 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-10-11 02:29:45,073 INFO L382 AbstractCegarLoop]: Difference is false [2021-10-11 02:29:45,073 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-10-11 02:29:45,073 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-10-11 02:29:45,086 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states. [2021-10-11 02:29:45,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-11 02:29:45,098 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:29:45,098 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-11 02:29:45,099 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:29:45,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:29:45,104 INFO L82 PathProgramCache]: Analyzing trace with hash 889906919, now seen corresponding path program 1 times [2021-10-11 02:29:45,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-11 02:29:45,121 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [763384099] [2021-10-11 02:29:45,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d0b13ae-7cb4-4662-878e-0a62c565b8b5/bin/utaipan-WLngWcDbfI/mathsat Starting monitored process 2 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with mathsat -unsat_core_generation=3 [2021-10-11 02:29:45,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:29:45,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 1 conjunts are in the unsatisfiable core [2021-10-11 02:29:45,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:29:45,475 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:29:45,475 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-10-11 02:29:45,476 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [763384099] [2021-10-11 02:29:45,476 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:29:45,477 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-11 02:29:45,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311514850] [2021-10-11 02:29:45,481 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-10-11 02:29:45,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-11 02:29:45,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-11 02:29:45,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-11 02:29:45,497 INFO L87 Difference]: Start difference. First operand 12 states. Second operand 2 states. [2021-10-11 02:29:45,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:29:45,511 INFO L93 Difference]: Finished difference Result 20 states and 23 transitions. [2021-10-11 02:29:45,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-11 02:29:45,512 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2021-10-11 02:29:45,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:29:45,520 INFO L225 Difference]: With dead ends: 20 [2021-10-11 02:29:45,520 INFO L226 Difference]: Without dead ends: 8 [2021-10-11 02:29:45,523 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-11 02:29:45,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2021-10-11 02:29:45,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2021-10-11 02:29:45,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-10-11 02:29:45,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2021-10-11 02:29:45,553 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2021-10-11 02:29:45,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:29:45,554 INFO L481 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2021-10-11 02:29:45,554 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2021-10-11 02:29:45,554 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2021-10-11 02:29:45,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-11 02:29:45,554 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:29:45,555 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:29:45,761 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2021-10-11 02:29:45,762 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:29:45,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:29:45,763 INFO L82 PathProgramCache]: Analyzing trace with hash 1810664400, now seen corresponding path program 1 times [2021-10-11 02:29:45,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-11 02:29:45,764 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2009144513] [2021-10-11 02:29:45,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d0b13ae-7cb4-4662-878e-0a62c565b8b5/bin/utaipan-WLngWcDbfI/mathsat Starting monitored process 3 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with mathsat -unsat_core_generation=3 [2021-10-11 02:29:46,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-11 02:29:46,352 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-11 02:29:46,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-11 02:29:46,894 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-11 02:29:46,950 INFO L173 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2021-10-11 02:29:46,951 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-10-11 02:29:47,152 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2021-10-11 02:29:47,174 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.10 02:29:47 BoogieIcfgContainer [2021-10-11 02:29:47,175 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-11 02:29:47,175 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-11 02:29:47,176 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-11 02:29:47,176 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-11 02:29:47,176 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:29:45" (3/4) ... [2021-10-11 02:29:47,178 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-11 02:29:47,224 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d0b13ae-7cb4-4662-878e-0a62c565b8b5/bin/utaipan-WLngWcDbfI/witness.graphml [2021-10-11 02:29:47,224 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-11 02:29:47,226 INFO L168 Benchmark]: Toolchain (without parser) took 6993.53 ms. Allocated memory was 71.3 MB in the beginning and 88.1 MB in the end (delta: 16.8 MB). Free memory was 52.6 MB in the beginning and 68.9 MB in the end (delta: -16.3 MB). Peak memory consumption was 23.8 MB. Max. memory is 16.1 GB. [2021-10-11 02:29:47,227 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 71.3 MB. Free memory is still 52.0 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:29:47,227 INFO L168 Benchmark]: CACSL2BoogieTranslator took 227.66 ms. Allocated memory is still 71.3 MB. Free memory was 52.5 MB in the beginning and 42.1 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-11 02:29:47,228 INFO L168 Benchmark]: Boogie Procedure Inliner took 49.66 ms. Allocated memory is still 71.3 MB. Free memory was 42.1 MB in the beginning and 54.7 MB in the end (delta: -12.5 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-10-11 02:29:47,229 INFO L168 Benchmark]: Boogie Preprocessor took 75.94 ms. Allocated memory is still 71.3 MB. Free memory was 54.7 MB in the beginning and 53.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-11 02:29:47,230 INFO L168 Benchmark]: RCFGBuilder took 4414.74 ms. Allocated memory is still 71.3 MB. Free memory was 53.3 MB in the beginning and 41.3 MB in the end (delta: 12.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-11 02:29:47,230 INFO L168 Benchmark]: TraceAbstraction took 2169.88 ms. Allocated memory is still 71.3 MB. Free memory was 40.9 MB in the beginning and 33.6 MB in the end (delta: 7.3 MB). Peak memory consumption was 10.0 MB. Max. memory is 16.1 GB. [2021-10-11 02:29:47,231 INFO L168 Benchmark]: Witness Printer took 48.71 ms. Allocated memory was 71.3 MB in the beginning and 88.1 MB in the end (delta: 16.8 MB). Free memory was 33.3 MB in the beginning and 68.9 MB in the end (delta: -35.6 MB). Peak memory consumption was 4.3 MB. Max. memory is 16.1 GB. [2021-10-11 02:29:47,235 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 71.3 MB. Free memory is still 52.0 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 227.66 ms. Allocated memory is still 71.3 MB. Free memory was 52.5 MB in the beginning and 42.1 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 49.66 ms. Allocated memory is still 71.3 MB. Free memory was 42.1 MB in the beginning and 54.7 MB in the end (delta: -12.5 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 75.94 ms. Allocated memory is still 71.3 MB. Free memory was 54.7 MB in the beginning and 53.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 4414.74 ms. Allocated memory is still 71.3 MB. Free memory was 53.3 MB in the beginning and 41.3 MB in the end (delta: 12.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 2169.88 ms. Allocated memory is still 71.3 MB. Free memory was 40.9 MB in the beginning and 33.6 MB in the end (delta: 7.3 MB). Peak memory consumption was 10.0 MB. Max. memory is 16.1 GB. * Witness Printer took 48.71 ms. Allocated memory was 71.3 MB in the beginning and 88.1 MB in the end (delta: 16.8 MB). Free memory was 33.3 MB in the beginning and 68.9 MB in the end (delta: -35.6 MB). Peak memory consumption was 4.3 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 14]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L20] float x = __VERIFIER_nondet_float() ; [L21] float exp = 1.0 ; [L22] float term = 1.0 ; [L23] unsigned int count = 1 ; [L24] float result = 2*(1/(1-x)) ; [L25] int temp ; [L27] COND TRUE 1 [L29] term = term * (x/count) [L30] exp = exp + term [L31] count++ [L33] temp = __VERIFIER_nondet_int() [L34] COND TRUE temp ==0 [L14] COND TRUE !(cond) [L14] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 12 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 2.0s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 12 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 5 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=12occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.8s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 13 NumberOfCodeBlocks, 13 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 5 ConstructedInterpolants, 0 QuantifiedInterpolants, 25 SizeOfPredicates, 0 NumberOfNonLiveVariables, 32 ConjunctsInSsa, 1 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...