./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-vcloud-master/worker/run_dir_34189270-3382-459d-b503-8e45e5cd130a/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_34189270-3382-459d-b503-8e45e5cd130a/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_34189270-3382-459d-b503-8e45e5cd130a/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_34189270-3382-459d-b503-8e45e5cd130a/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-floats-scientific-comp/loop1-2.c -s /tmp/vcloud-vcloud-master/worker/run_dir_34189270-3382-459d-b503-8e45e5cd130a/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_34189270-3382-459d-b503-8e45e5cd130a/bin/utaipan --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-vcloud-master/worker/run_dir_34189270-3382-459d-b503-8e45e5cd130a/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_34189270-3382-459d-b503-8e45e5cd130a/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_34189270-3382-459d-b503-8e45e5cd130a/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_34189270-3382-459d-b503-8e45e5cd130a/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-floats-scientific-comp/loop1-2.c -s /tmp/vcloud-vcloud-master/worker/run_dir_34189270-3382-459d-b503-8e45e5cd130a/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_34189270-3382-459d-b503-8e45e5cd130a/bin/utaipan --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 [2020-12-09 07:28:12,280 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 07:28:12,282 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 07:28:12,305 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 07:28:12,306 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 07:28:12,307 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 07:28:12,308 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 07:28:12,310 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 07:28:12,311 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 07:28:12,312 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 07:28:12,313 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 07:28:12,314 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 07:28:12,314 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 07:28:12,315 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 07:28:12,316 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 07:28:12,317 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 07:28:12,318 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 07:28:12,319 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 07:28:12,320 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 07:28:12,322 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 07:28:12,323 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 07:28:12,325 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 07:28:12,326 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 07:28:12,326 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 07:28:12,329 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 07:28:12,329 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 07:28:12,330 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 07:28:12,330 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 07:28:12,331 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 07:28:12,332 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 07:28:12,332 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 07:28:12,333 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 07:28:12,333 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 07:28:12,334 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 07:28:12,335 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 07:28:12,335 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 07:28:12,336 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 07:28:12,336 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 07:28:12,336 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 07:28:12,337 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 07:28:12,337 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 07:28:12,338 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_34189270-3382-459d-b503-8e45e5cd130a/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-12-09 07:28:12,358 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 07:28:12,358 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 07:28:12,363 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 07:28:12,363 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 07:28:12,363 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 07:28:12,364 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 07:28:12,364 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-12-09 07:28:12,364 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 07:28:12,364 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 07:28:12,364 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-12-09 07:28:12,364 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-12-09 07:28:12,364 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 07:28:12,364 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-12-09 07:28:12,364 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-12-09 07:28:12,365 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-12-09 07:28:12,365 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 07:28:12,365 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 07:28:12,365 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-09 07:28:12,365 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 07:28:12,366 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 07:28:12,366 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-09 07:28:12,366 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 07:28:12,366 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-09 07:28:12,366 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 07:28:12,366 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 07:28:12,366 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-09 07:28:12,366 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 07:28:12,366 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-09 07:28:12,367 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 07:28:12,367 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 07:28:12,367 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 07:28:12,367 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 07:28:12,367 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 07:28:12,367 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-09 07:28:12,367 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-12-09 07:28:12,367 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-09 07:28:12,367 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-09 07:28:12,368 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 07:28:12,368 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 07:28:12,368 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-vcloud-master/worker/run_dir_34189270-3382-459d-b503-8e45e5cd130a/bin/utaipan/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_34189270-3382-459d-b503-8e45e5cd130a/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a0e23aa9bbb10ea2680f8206f9d74b19166b1199 [2020-12-09 07:28:12,531 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 07:28:12,550 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 07:28:12,552 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 07:28:12,553 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 07:28:12,553 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 07:28:12,554 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_34189270-3382-459d-b503-8e45e5cd130a/bin/utaipan/../../sv-benchmarks/c/loop-floats-scientific-comp/loop1-2.c [2020-12-09 07:28:12,598 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_34189270-3382-459d-b503-8e45e5cd130a/bin/utaipan/data/ef03865f4/268d9ff4f55c4b7ca5075dad4116f8b9/FLAG0946c39f2 [2020-12-09 07:28:12,968 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 07:28:12,969 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_34189270-3382-459d-b503-8e45e5cd130a/sv-benchmarks/c/loop-floats-scientific-comp/loop1-2.c [2020-12-09 07:28:12,973 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_34189270-3382-459d-b503-8e45e5cd130a/bin/utaipan/data/ef03865f4/268d9ff4f55c4b7ca5075dad4116f8b9/FLAG0946c39f2 [2020-12-09 07:28:12,982 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_34189270-3382-459d-b503-8e45e5cd130a/bin/utaipan/data/ef03865f4/268d9ff4f55c4b7ca5075dad4116f8b9 [2020-12-09 07:28:12,984 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 07:28:12,985 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 07:28:12,986 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 07:28:12,986 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 07:28:12,989 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 07:28:12,990 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 07:28:12" (1/1) ... [2020-12-09 07:28:12,991 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@33c45819 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:28:12, skipping insertion in model container [2020-12-09 07:28:12,991 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 07:28:12" (1/1) ... [2020-12-09 07:28:12,997 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 07:28:13,006 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 07:28:13,104 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_34189270-3382-459d-b503-8e45e5cd130a/sv-benchmarks/c/loop-floats-scientific-comp/loop1-2.c[538,551] [2020-12-09 07:28:13,116 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 07:28:13,123 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 07:28:13,132 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_34189270-3382-459d-b503-8e45e5cd130a/sv-benchmarks/c/loop-floats-scientific-comp/loop1-2.c[538,551] [2020-12-09 07:28:13,136 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 07:28:13,146 INFO L208 MainTranslator]: Completed translation [2020-12-09 07:28:13,147 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:28:13 WrapperNode [2020-12-09 07:28:13,147 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 07:28:13,148 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 07:28:13,148 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 07:28:13,148 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 07:28:13,153 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:28:13" (1/1) ... [2020-12-09 07:28:13,158 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:28:13" (1/1) ... [2020-12-09 07:28:13,170 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 07:28:13,171 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 07:28:13,171 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 07:28:13,171 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 07:28:13,176 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:28:13" (1/1) ... [2020-12-09 07:28:13,177 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:28:13" (1/1) ... [2020-12-09 07:28:13,178 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:28:13" (1/1) ... [2020-12-09 07:28:13,178 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:28:13" (1/1) ... [2020-12-09 07:28:13,181 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:28:13" (1/1) ... [2020-12-09 07:28:13,183 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:28:13" (1/1) ... [2020-12-09 07:28:13,184 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:28:13" (1/1) ... [2020-12-09 07:28:13,185 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 07:28:13,186 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 07:28:13,186 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 07:28:13,187 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 07:28:13,187 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:28:13" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_34189270-3382-459d-b503-8e45e5cd130a/bin/utaipan/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 [2020-12-09 07:28:13,251 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-09 07:28:13,251 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 07:28:13,251 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 07:28:13,251 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 07:28:13,413 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 07:28:13,413 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2020-12-09 07:28:13,415 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 07:28:13 BoogieIcfgContainer [2020-12-09 07:28:13,415 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 07:28:13,417 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 07:28:13,417 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 07:28:13,419 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 07:28:13,419 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 07:28:12" (1/3) ... [2020-12-09 07:28:13,420 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12fe2461 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 07:28:13, skipping insertion in model container [2020-12-09 07:28:13,420 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:28:13" (2/3) ... [2020-12-09 07:28:13,420 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12fe2461 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 07:28:13, skipping insertion in model container [2020-12-09 07:28:13,421 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 07:28:13" (3/3) ... [2020-12-09 07:28:13,422 INFO L111 eAbstractionObserver]: Analyzing ICFG loop1-2.c [2020-12-09 07:28:13,432 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 07:28:13,434 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-09 07:28:13,442 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-09 07:28:13,459 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 07:28:13,459 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-09 07:28:13,459 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 07:28:13,459 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 07:28:13,459 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 07:28:13,460 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 07:28:13,460 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 07:28:13,460 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 07:28:13,468 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states. [2020-12-09 07:28:13,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-12-09 07:28:13,471 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 07:28:13,472 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-12-09 07:28:13,472 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 07:28:13,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 07:28:13,476 INFO L82 PathProgramCache]: Analyzing trace with hash 61151090, now seen corresponding path program 1 times [2020-12-09 07:28:13,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 07:28:13,483 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551110488] [2020-12-09 07:28:13,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 07:28:13,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 07:28:13,572 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 07:28:13,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551110488] [2020-12-09 07:28:13,573 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 07:28:13,573 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 07:28:13,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487191772] [2020-12-09 07:28:13,577 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-09 07:28:13,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 07:28:13,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-09 07:28:13,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-09 07:28:13,588 INFO L87 Difference]: Start difference. First operand 9 states. Second operand 2 states. [2020-12-09 07:28:13,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 07:28:13,597 INFO L93 Difference]: Finished difference Result 15 states and 17 transitions. [2020-12-09 07:28:13,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-09 07:28:13,598 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 5 [2020-12-09 07:28:13,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 07:28:13,604 INFO L225 Difference]: With dead ends: 15 [2020-12-09 07:28:13,604 INFO L226 Difference]: Without dead ends: 7 [2020-12-09 07:28:13,613 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 [2020-12-09 07:28:13,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2020-12-09 07:28:13,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2020-12-09 07:28:13,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2020-12-09 07:28:13,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2020-12-09 07:28:13,634 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 5 [2020-12-09 07:28:13,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 07:28:13,634 INFO L481 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2020-12-09 07:28:13,634 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-09 07:28:13,634 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2020-12-09 07:28:13,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-09 07:28:13,634 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 07:28:13,634 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-09 07:28:13,635 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-09 07:28:13,635 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 07:28:13,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 07:28:13,635 INFO L82 PathProgramCache]: Analyzing trace with hash 1871490578, now seen corresponding path program 1 times [2020-12-09 07:28:13,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 07:28:13,636 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582857977] [2020-12-09 07:28:13,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 07:28:13,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 07:28:13,656 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 07:28:13,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 07:28:13,668 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 07:28:13,680 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2020-12-09 07:28:13,681 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-09 07:28:13,681 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-09 07:28:13,695 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 07:28:13 BoogieIcfgContainer [2020-12-09 07:28:13,696 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 07:28:13,696 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 07:28:13,696 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 07:28:13,696 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 07:28:13,697 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 07:28:13" (3/4) ... [2020-12-09 07:28:13,699 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-12-09 07:28:13,699 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 07:28:13,701 INFO L168 Benchmark]: Toolchain (without parser) took 714.79 ms. Allocated memory is still 132.1 MB. Free memory was 111.4 MB in the beginning and 104.1 MB in the end (delta: 7.3 MB). Peak memory consumption was 8.7 MB. Max. memory is 16.1 GB. [2020-12-09 07:28:13,701 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 81.8 MB. Free memory was 53.9 MB in the beginning and 53.8 MB in the end (delta: 79.1 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 07:28:13,702 INFO L168 Benchmark]: CACSL2BoogieTranslator took 160.89 ms. Allocated memory is still 132.1 MB. Free memory was 111.2 MB in the beginning and 101.4 MB in the end (delta: 9.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-12-09 07:28:13,702 INFO L168 Benchmark]: Boogie Procedure Inliner took 22.63 ms. Allocated memory is still 132.1 MB. Free memory was 101.4 MB in the beginning and 100.1 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 07:28:13,703 INFO L168 Benchmark]: Boogie Preprocessor took 14.92 ms. Allocated memory is still 132.1 MB. Free memory was 99.8 MB in the beginning and 98.9 MB in the end (delta: 961.8 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 07:28:13,703 INFO L168 Benchmark]: RCFGBuilder took 228.63 ms. Allocated memory is still 132.1 MB. Free memory was 98.9 MB in the beginning and 85.4 MB in the end (delta: 13.5 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2020-12-09 07:28:13,704 INFO L168 Benchmark]: TraceAbstraction took 279.01 ms. Allocated memory is still 132.1 MB. Free memory was 85.1 MB in the beginning and 104.6 MB in the end (delta: -19.5 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 07:28:13,704 INFO L168 Benchmark]: Witness Printer took 3.19 ms. Allocated memory is still 132.1 MB. Free memory was 104.6 MB in the beginning and 104.1 MB in the end (delta: 511.9 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 07:28:13,707 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 81.8 MB. Free memory was 53.9 MB in the beginning and 53.8 MB in the end (delta: 79.1 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 160.89 ms. Allocated memory is still 132.1 MB. Free memory was 111.2 MB in the beginning and 101.4 MB in the end (delta: 9.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 22.63 ms. Allocated memory is still 132.1 MB. Free memory was 101.4 MB in the beginning and 100.1 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 14.92 ms. Allocated memory is still 132.1 MB. Free memory was 99.8 MB in the beginning and 98.9 MB in the end (delta: 961.8 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 228.63 ms. Allocated memory is still 132.1 MB. Free memory was 98.9 MB in the beginning and 85.4 MB in the end (delta: 13.5 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 279.01 ms. Allocated memory is still 132.1 MB. Free memory was 85.1 MB in the beginning and 104.6 MB in the end (delta: -19.5 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 3.19 ms. Allocated memory is still 132.1 MB. Free memory was 104.6 MB in the beginning and 104.1 MB in the end (delta: 511.9 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: 0.2s, 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 [2020-12-09 07:28:15,263 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 07:28:15,265 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 07:28:15,299 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 07:28:15,300 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 07:28:15,301 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 07:28:15,303 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 07:28:15,305 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 07:28:15,307 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 07:28:15,309 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 07:28:15,310 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 07:28:15,311 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 07:28:15,312 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 07:28:15,313 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 07:28:15,314 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 07:28:15,315 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 07:28:15,316 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 07:28:15,317 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 07:28:15,319 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 07:28:15,321 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 07:28:15,323 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 07:28:15,325 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 07:28:15,326 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 07:28:15,327 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 07:28:15,330 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 07:28:15,330 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 07:28:15,331 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 07:28:15,332 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 07:28:15,332 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 07:28:15,334 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 07:28:15,334 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 07:28:15,335 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 07:28:15,336 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 07:28:15,336 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 07:28:15,337 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 07:28:15,337 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 07:28:15,338 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 07:28:15,338 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 07:28:15,338 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 07:28:15,339 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 07:28:15,340 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 07:28:15,340 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_34189270-3382-459d-b503-8e45e5cd130a/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2020-12-09 07:28:15,363 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 07:28:15,363 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 07:28:15,364 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 07:28:15,364 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 07:28:15,364 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 07:28:15,365 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 07:28:15,365 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 07:28:15,365 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 07:28:15,365 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 07:28:15,366 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 07:28:15,366 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 07:28:15,366 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 07:28:15,366 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 07:28:15,367 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-09 07:28:15,367 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 07:28:15,367 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-09 07:28:15,367 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 07:28:15,367 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2020-12-09 07:28:15,367 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2020-12-09 07:28:15,368 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 07:28:15,368 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-09 07:28:15,368 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 07:28:15,368 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-09 07:28:15,368 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 07:28:15,368 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-09 07:28:15,369 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 07:28:15,369 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 07:28:15,369 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 07:28:15,369 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 07:28:15,369 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-09 07:28:15,370 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2020-12-09 07:28:15,370 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2020-12-09 07:28:15,370 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-09 07:28:15,370 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 07:28:15,370 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 07:28:15,370 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-vcloud-master/worker/run_dir_34189270-3382-459d-b503-8e45e5cd130a/bin/utaipan/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_34189270-3382-459d-b503-8e45e5cd130a/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a0e23aa9bbb10ea2680f8206f9d74b19166b1199 [2020-12-09 07:28:15,595 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 07:28:15,610 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 07:28:15,612 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 07:28:15,613 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 07:28:15,613 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 07:28:15,614 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_34189270-3382-459d-b503-8e45e5cd130a/bin/utaipan/../../sv-benchmarks/c/loop-floats-scientific-comp/loop1-2.c [2020-12-09 07:28:15,655 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_34189270-3382-459d-b503-8e45e5cd130a/bin/utaipan/data/15315d227/21ed578f1994474fb0e4918325d19ca6/FLAG93b5ee3a0 [2020-12-09 07:28:16,020 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 07:28:16,020 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_34189270-3382-459d-b503-8e45e5cd130a/sv-benchmarks/c/loop-floats-scientific-comp/loop1-2.c [2020-12-09 07:28:16,026 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_34189270-3382-459d-b503-8e45e5cd130a/bin/utaipan/data/15315d227/21ed578f1994474fb0e4918325d19ca6/FLAG93b5ee3a0 [2020-12-09 07:28:16,037 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_34189270-3382-459d-b503-8e45e5cd130a/bin/utaipan/data/15315d227/21ed578f1994474fb0e4918325d19ca6 [2020-12-09 07:28:16,039 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 07:28:16,040 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 07:28:16,041 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 07:28:16,041 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 07:28:16,044 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 07:28:16,044 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 07:28:16" (1/1) ... [2020-12-09 07:28:16,046 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@28562a19 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:28:16, skipping insertion in model container [2020-12-09 07:28:16,046 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 07:28:16" (1/1) ... [2020-12-09 07:28:16,052 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 07:28:16,063 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 07:28:16,167 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_34189270-3382-459d-b503-8e45e5cd130a/sv-benchmarks/c/loop-floats-scientific-comp/loop1-2.c[538,551] [2020-12-09 07:28:16,180 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 07:28:16,189 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 07:28:16,207 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_34189270-3382-459d-b503-8e45e5cd130a/sv-benchmarks/c/loop-floats-scientific-comp/loop1-2.c[538,551] [2020-12-09 07:28:16,214 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 07:28:16,226 INFO L208 MainTranslator]: Completed translation [2020-12-09 07:28:16,226 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:28:16 WrapperNode [2020-12-09 07:28:16,226 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 07:28:16,227 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 07:28:16,227 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 07:28:16,227 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 07:28:16,233 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:28:16" (1/1) ... [2020-12-09 07:28:16,239 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:28:16" (1/1) ... [2020-12-09 07:28:16,251 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 07:28:16,251 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 07:28:16,251 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 07:28:16,251 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 07:28:16,257 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:28:16" (1/1) ... [2020-12-09 07:28:16,257 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:28:16" (1/1) ... [2020-12-09 07:28:16,259 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:28:16" (1/1) ... [2020-12-09 07:28:16,259 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:28:16" (1/1) ... [2020-12-09 07:28:16,264 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:28:16" (1/1) ... [2020-12-09 07:28:16,267 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:28:16" (1/1) ... [2020-12-09 07:28:16,268 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:28:16" (1/1) ... [2020-12-09 07:28:16,270 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 07:28:16,270 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 07:28:16,271 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 07:28:16,271 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 07:28:16,271 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:28:16" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_34189270-3382-459d-b503-8e45e5cd130a/bin/utaipan/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 [2020-12-09 07:28:16,322 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2020-12-09 07:28:16,323 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 07:28:16,323 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 07:28:16,323 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 07:28:20,553 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 07:28:20,553 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2020-12-09 07:28:20,554 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 07:28:20 BoogieIcfgContainer [2020-12-09 07:28:20,554 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 07:28:20,555 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 07:28:20,555 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 07:28:20,557 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 07:28:20,558 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 07:28:16" (1/3) ... [2020-12-09 07:28:20,558 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@438a7cfd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 07:28:20, skipping insertion in model container [2020-12-09 07:28:20,558 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:28:16" (2/3) ... [2020-12-09 07:28:20,558 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@438a7cfd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 07:28:20, skipping insertion in model container [2020-12-09 07:28:20,559 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 07:28:20" (3/3) ... [2020-12-09 07:28:20,559 INFO L111 eAbstractionObserver]: Analyzing ICFG loop1-2.c [2020-12-09 07:28:20,568 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 07:28:20,570 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-09 07:28:20,582 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-09 07:28:20,598 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 07:28:20,598 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-09 07:28:20,598 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 07:28:20,598 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 07:28:20,599 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 07:28:20,599 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 07:28:20,599 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 07:28:20,599 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 07:28:20,606 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states. [2020-12-09 07:28:20,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-09 07:28:20,610 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 07:28:20,610 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-09 07:28:20,610 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 07:28:20,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 07:28:20,614 INFO L82 PathProgramCache]: Analyzing trace with hash 889906919, now seen corresponding path program 1 times [2020-12-09 07:28:20,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 07:28:20,622 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [195178105] [2020-12-09 07:28:20,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_34189270-3382-459d-b503-8e45e5cd130a/bin/utaipan/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 [2020-12-09 07:28:20,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 07:28:20,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 1 conjunts are in the unsatisfiable core [2020-12-09 07:28:20,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 07:28:20,865 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 07:28:20,866 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 07:28:20,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [195178105] [2020-12-09 07:28:20,867 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 07:28:20,867 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 07:28:20,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644618209] [2020-12-09 07:28:20,870 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-09 07:28:20,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 07:28:20,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-09 07:28:20,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-09 07:28:20,881 INFO L87 Difference]: Start difference. First operand 12 states. Second operand 2 states. [2020-12-09 07:28:20,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 07:28:20,890 INFO L93 Difference]: Finished difference Result 20 states and 23 transitions. [2020-12-09 07:28:20,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-09 07:28:20,891 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2020-12-09 07:28:20,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 07:28:20,896 INFO L225 Difference]: With dead ends: 20 [2020-12-09 07:28:20,897 INFO L226 Difference]: Without dead ends: 8 [2020-12-09 07:28:20,898 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 [2020-12-09 07:28:20,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2020-12-09 07:28:20,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2020-12-09 07:28:20,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-12-09 07:28:20,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2020-12-09 07:28:20,918 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2020-12-09 07:28:20,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 07:28:20,918 INFO L481 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2020-12-09 07:28:20,918 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-09 07:28:20,918 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2020-12-09 07:28:20,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-09 07:28:20,918 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 07:28:20,918 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-09 07:28:21,119 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-12-09 07:28:21,121 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 07:28:21,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 07:28:21,124 INFO L82 PathProgramCache]: Analyzing trace with hash 1810664400, now seen corresponding path program 1 times [2020-12-09 07:28:21,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 07:28:21,126 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1920014114] [2020-12-09 07:28:21,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_34189270-3382-459d-b503-8e45e5cd130a/bin/utaipan/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 [2020-12-09 07:28:21,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 07:28:21,620 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 07:28:22,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 07:28:22,102 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 07:28:22,149 INFO L173 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2020-12-09 07:28:22,150 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-09 07:28:22,351 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-12-09 07:28:22,372 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 07:28:22 BoogieIcfgContainer [2020-12-09 07:28:22,372 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 07:28:22,373 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 07:28:22,373 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 07:28:22,373 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 07:28:22,373 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 07:28:20" (3/4) ... [2020-12-09 07:28:22,374 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-12-09 07:28:22,400 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_34189270-3382-459d-b503-8e45e5cd130a/bin/utaipan/witness.graphml [2020-12-09 07:28:22,400 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 07:28:22,402 INFO L168 Benchmark]: Toolchain (without parser) took 6360.82 ms. Allocated memory was 60.8 MB in the beginning and 73.4 MB in the end (delta: 12.6 MB). Free memory was 42.1 MB in the beginning and 52.5 MB in the end (delta: -10.4 MB). Peak memory consumption was 973.9 kB. Max. memory is 16.1 GB. [2020-12-09 07:28:22,402 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 60.8 MB. Free memory is still 43.5 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 07:28:22,402 INFO L168 Benchmark]: CACSL2BoogieTranslator took 185.40 ms. Allocated memory is still 60.8 MB. Free memory was 42.0 MB in the beginning and 44.3 MB in the end (delta: -2.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-12-09 07:28:22,403 INFO L168 Benchmark]: Boogie Procedure Inliner took 23.57 ms. Allocated memory is still 60.8 MB. Free memory was 44.3 MB in the beginning and 42.7 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 07:28:22,403 INFO L168 Benchmark]: Boogie Preprocessor took 18.66 ms. Allocated memory is still 60.8 MB. Free memory was 42.7 MB in the beginning and 41.4 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 07:28:22,404 INFO L168 Benchmark]: RCFGBuilder took 4283.86 ms. Allocated memory is still 60.8 MB. Free memory was 41.4 MB in the beginning and 29.4 MB in the end (delta: 12.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-12-09 07:28:22,404 INFO L168 Benchmark]: TraceAbstraction took 1816.97 ms. Allocated memory was 60.8 MB in the beginning and 73.4 MB in the end (delta: 12.6 MB). Free memory was 29.1 MB in the beginning and 54.5 MB in the end (delta: -25.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-12-09 07:28:22,404 INFO L168 Benchmark]: Witness Printer took 27.57 ms. Allocated memory is still 73.4 MB. Free memory was 54.0 MB in the beginning and 52.5 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 07:28:22,407 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 60.8 MB. Free memory is still 43.5 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 185.40 ms. Allocated memory is still 60.8 MB. Free memory was 42.0 MB in the beginning and 44.3 MB in the end (delta: -2.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 23.57 ms. Allocated memory is still 60.8 MB. Free memory was 44.3 MB in the beginning and 42.7 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 18.66 ms. Allocated memory is still 60.8 MB. Free memory was 42.7 MB in the beginning and 41.4 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 4283.86 ms. Allocated memory is still 60.8 MB. Free memory was 41.4 MB in the beginning and 29.4 MB in the end (delta: 12.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1816.97 ms. Allocated memory was 60.8 MB in the beginning and 73.4 MB in the end (delta: 12.6 MB). Free memory was 29.1 MB in the beginning and 54.5 MB in the end (delta: -25.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Witness Printer took 27.57 ms. Allocated memory is still 73.4 MB. Free memory was 54.0 MB in the beginning and 52.5 MB in the end (delta: 1.5 MB). There was no memory consumed. 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: 1.7s, 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, 0.6s 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...