./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 a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_5c72f56f-c187-4779-91da-c768b16fed7a/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_5c72f56f-c187-4779-91da-c768b16fed7a/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_5c72f56f-c187-4779-91da-c768b16fed7a/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_5c72f56f-c187-4779-91da-c768b16fed7a/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loop-floats-scientific-comp/loop1-2.c -s /tmp/vcloud-vcloud-master/worker/run_dir_5c72f56f-c187-4779-91da-c768b16fed7a/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_5c72f56f-c187-4779-91da-c768b16fed7a/bin/uautomizer --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 Automizer --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_5c72f56f-c187-4779-91da-c768b16fed7a/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_5c72f56f-c187-4779-91da-c768b16fed7a/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_5c72f56f-c187-4779-91da-c768b16fed7a/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_5c72f56f-c187-4779-91da-c768b16fed7a/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loop-floats-scientific-comp/loop1-2.c -s /tmp/vcloud-vcloud-master/worker/run_dir_5c72f56f-c187-4779-91da-c768b16fed7a/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_5c72f56f-c187-4779-91da-c768b16fed7a/bin/uautomizer --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 Automizer --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-a4ecdab [2020-11-29 20:12:57,181 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-29 20:12:57,184 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-29 20:12:57,266 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-29 20:12:57,267 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-29 20:12:57,272 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-29 20:12:57,276 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-29 20:12:57,281 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-29 20:12:57,284 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-29 20:12:57,291 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-29 20:12:57,292 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-29 20:12:57,294 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-29 20:12:57,295 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-29 20:12:57,299 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-29 20:12:57,301 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-29 20:12:57,303 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-29 20:12:57,305 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-29 20:12:57,306 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-29 20:12:57,312 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-29 20:12:57,321 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-29 20:12:57,324 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-29 20:12:57,326 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-29 20:12:57,328 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-29 20:12:57,330 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-29 20:12:57,340 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-29 20:12:57,341 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-29 20:12:57,341 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-29 20:12:57,344 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-29 20:12:57,345 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-29 20:12:57,346 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-29 20:12:57,347 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-29 20:12:57,349 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-29 20:12:57,351 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-29 20:12:57,352 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-29 20:12:57,354 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-29 20:12:57,354 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-29 20:12:57,355 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-29 20:12:57,356 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-29 20:12:57,356 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-29 20:12:57,357 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-29 20:12:57,358 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-29 20:12:57,361 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_5c72f56f-c187-4779-91da-c768b16fed7a/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-11-29 20:12:57,408 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-29 20:12:57,409 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-29 20:12:57,411 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-29 20:12:57,411 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-29 20:12:57,412 INFO L138 SettingsManager]: * Use SBE=true [2020-11-29 20:12:57,412 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-29 20:12:57,412 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-29 20:12:57,413 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-29 20:12:57,413 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-29 20:12:57,413 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-29 20:12:57,414 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-29 20:12:57,415 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-29 20:12:57,415 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-29 20:12:57,415 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-29 20:12:57,416 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-29 20:12:57,416 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-29 20:12:57,416 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-29 20:12:57,416 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-29 20:12:57,417 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-29 20:12:57,417 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-29 20:12:57,417 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-29 20:12:57,417 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-29 20:12:57,418 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-29 20:12:57,418 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-29 20:12:57,418 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-29 20:12:57,419 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-29 20:12:57,419 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-29 20:12:57,419 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-29 20:12:57,419 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-29 20:12:57,420 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_5c72f56f-c187-4779-91da-c768b16fed7a/bin/uautomizer/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_5c72f56f-c187-4779-91da-c768b16fed7a/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a0e23aa9bbb10ea2680f8206f9d74b19166b1199 [2020-11-29 20:12:57,797 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-29 20:12:57,841 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-29 20:12:57,846 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-29 20:12:57,848 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-29 20:12:57,849 INFO L275 PluginConnector]: CDTParser initialized [2020-11-29 20:12:57,851 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_5c72f56f-c187-4779-91da-c768b16fed7a/bin/uautomizer/../../sv-benchmarks/c/loop-floats-scientific-comp/loop1-2.c [2020-11-29 20:12:57,942 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_5c72f56f-c187-4779-91da-c768b16fed7a/bin/uautomizer/data/5ae60b7b6/75c788173b9c4e8b91c9e564cfb300c7/FLAG0801faf64 [2020-11-29 20:12:58,498 INFO L306 CDTParser]: Found 1 translation units. [2020-11-29 20:12:58,499 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_5c72f56f-c187-4779-91da-c768b16fed7a/sv-benchmarks/c/loop-floats-scientific-comp/loop1-2.c [2020-11-29 20:12:58,510 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_5c72f56f-c187-4779-91da-c768b16fed7a/bin/uautomizer/data/5ae60b7b6/75c788173b9c4e8b91c9e564cfb300c7/FLAG0801faf64 [2020-11-29 20:12:58,864 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_5c72f56f-c187-4779-91da-c768b16fed7a/bin/uautomizer/data/5ae60b7b6/75c788173b9c4e8b91c9e564cfb300c7 [2020-11-29 20:12:58,867 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-29 20:12:58,869 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-29 20:12:58,885 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-29 20:12:58,885 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-29 20:12:58,888 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-29 20:12:58,889 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 08:12:58" (1/1) ... [2020-11-29 20:12:58,891 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@157dbd7d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:12:58, skipping insertion in model container [2020-11-29 20:12:58,892 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 08:12:58" (1/1) ... [2020-11-29 20:12:58,900 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-29 20:12:58,925 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-29 20:12:59,090 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 20:12:59,100 INFO L203 MainTranslator]: Completed pre-run [2020-11-29 20:12:59,144 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 20:12:59,164 INFO L208 MainTranslator]: Completed translation [2020-11-29 20:12:59,165 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:12:59 WrapperNode [2020-11-29 20:12:59,165 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-29 20:12:59,166 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-29 20:12:59,166 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-29 20:12:59,166 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-29 20:12:59,175 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:12:59" (1/1) ... [2020-11-29 20:12:59,183 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:12:59" (1/1) ... [2020-11-29 20:12:59,201 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-29 20:12:59,202 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-29 20:12:59,203 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-29 20:12:59,203 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-29 20:12:59,212 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:12:59" (1/1) ... [2020-11-29 20:12:59,212 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:12:59" (1/1) ... [2020-11-29 20:12:59,214 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:12:59" (1/1) ... [2020-11-29 20:12:59,214 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:12:59" (1/1) ... [2020-11-29 20:12:59,233 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:12:59" (1/1) ... [2020-11-29 20:12:59,237 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:12:59" (1/1) ... [2020-11-29 20:12:59,239 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:12:59" (1/1) ... [2020-11-29 20:12:59,241 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-29 20:12:59,242 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-29 20:12:59,242 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-29 20:12:59,242 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-29 20:12:59,253 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:12:59" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5c72f56f-c187-4779-91da-c768b16fed7a/bin/uautomizer/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 [2020-11-29 20:12:59,324 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-29 20:12:59,324 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-29 20:12:59,324 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-29 20:12:59,325 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-29 20:12:59,713 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-29 20:12:59,716 INFO L298 CfgBuilder]: Removed 9 assume(true) statements. [2020-11-29 20:12:59,718 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 08:12:59 BoogieIcfgContainer [2020-11-29 20:12:59,719 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-29 20:12:59,721 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-29 20:12:59,722 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-29 20:12:59,726 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-29 20:12:59,726 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 08:12:58" (1/3) ... [2020-11-29 20:12:59,727 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59d167cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 08:12:59, skipping insertion in model container [2020-11-29 20:12:59,727 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:12:59" (2/3) ... [2020-11-29 20:12:59,728 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59d167cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 08:12:59, skipping insertion in model container [2020-11-29 20:12:59,728 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 08:12:59" (3/3) ... [2020-11-29 20:12:59,730 INFO L111 eAbstractionObserver]: Analyzing ICFG loop1-2.c [2020-11-29 20:12:59,747 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-29 20:12:59,752 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-29 20:12:59,765 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-29 20:12:59,806 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-29 20:12:59,807 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-29 20:12:59,807 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-29 20:12:59,807 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-29 20:12:59,807 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-29 20:12:59,807 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-29 20:12:59,808 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-29 20:12:59,808 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-29 20:12:59,825 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states. [2020-11-29 20:12:59,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-11-29 20:12:59,831 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:12:59,832 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-11-29 20:12:59,832 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:12:59,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:12:59,840 INFO L82 PathProgramCache]: Analyzing trace with hash 889906919, now seen corresponding path program 1 times [2020-11-29 20:12:59,851 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:12:59,852 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640978708] [2020-11-29 20:12:59,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:12:59,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:13:00,039 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:13:00,040 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640978708] [2020-11-29 20:13:00,042 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 20:13:00,042 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-29 20:13:00,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903856184] [2020-11-29 20:13:00,049 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-11-29 20:13:00,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:13:00,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-11-29 20:13:00,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-29 20:13:00,071 INFO L87 Difference]: Start difference. First operand 13 states. Second operand 2 states. [2020-11-29 20:13:00,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:13:00,094 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2020-11-29 20:13:00,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-29 20:13:00,097 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2020-11-29 20:13:00,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:13:00,111 INFO L225 Difference]: With dead ends: 21 [2020-11-29 20:13:00,111 INFO L226 Difference]: Without dead ends: 8 [2020-11-29 20:13:00,120 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 [2020-11-29 20:13:00,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2020-11-29 20:13:00,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2020-11-29 20:13:00,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-11-29 20:13:00,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2020-11-29 20:13:00,156 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2020-11-29 20:13:00,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:13:00,157 INFO L481 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2020-11-29 20:13:00,157 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-11-29 20:13:00,158 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2020-11-29 20:13:00,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-11-29 20:13:00,159 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:13:00,159 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:13:00,159 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-29 20:13:00,160 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:13:00,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:13:00,164 INFO L82 PathProgramCache]: Analyzing trace with hash 1810664400, now seen corresponding path program 1 times [2020-11-29 20:13:00,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:13:00,164 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830818426] [2020-11-29 20:13:00,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:13:00,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 20:13:00,219 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 20:13:00,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 20:13:00,261 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 20:13:00,285 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 20:13:00,285 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-29 20:13:00,286 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-29 20:13:00,319 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.11 08:13:00 BoogieIcfgContainer [2020-11-29 20:13:00,320 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-29 20:13:00,320 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-29 20:13:00,320 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-29 20:13:00,321 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-29 20:13:00,321 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 08:12:59" (3/4) ... [2020-11-29 20:13:00,324 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-11-29 20:13:00,324 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-29 20:13:00,326 INFO L168 Benchmark]: Toolchain (without parser) took 1456.14 ms. Allocated memory was 86.0 MB in the beginning and 104.9 MB in the end (delta: 18.9 MB). Free memory was 55.3 MB in the beginning and 48.9 MB in the end (delta: 6.4 MB). Peak memory consumption was 22.1 MB. Max. memory is 16.1 GB. [2020-11-29 20:13:00,327 INFO L168 Benchmark]: CDTParser took 0.31 ms. Allocated memory is still 86.0 MB. Free memory is still 45.8 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 20:13:00,328 INFO L168 Benchmark]: CACSL2BoogieTranslator took 280.56 ms. Allocated memory was 86.0 MB in the beginning and 104.9 MB in the end (delta: 18.9 MB). Free memory was 55.1 MB in the beginning and 83.1 MB in the end (delta: -28.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-29 20:13:00,328 INFO L168 Benchmark]: Boogie Procedure Inliner took 35.84 ms. Allocated memory is still 104.9 MB. Free memory was 83.1 MB in the beginning and 81.5 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 20:13:00,329 INFO L168 Benchmark]: Boogie Preprocessor took 38.35 ms. Allocated memory is still 104.9 MB. Free memory was 81.5 MB in the beginning and 80.3 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 20:13:00,330 INFO L168 Benchmark]: RCFGBuilder took 477.23 ms. Allocated memory is still 104.9 MB. Free memory was 80.3 MB in the beginning and 69.0 MB in the end (delta: 11.3 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2020-11-29 20:13:00,331 INFO L168 Benchmark]: TraceAbstraction took 599.11 ms. Allocated memory is still 104.9 MB. Free memory was 69.0 MB in the beginning and 48.9 MB in the end (delta: 20.1 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. [2020-11-29 20:13:00,331 INFO L168 Benchmark]: Witness Printer took 3.80 ms. Allocated memory is still 104.9 MB. Free memory is still 48.9 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 20:13:00,335 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31 ms. Allocated memory is still 86.0 MB. Free memory is still 45.8 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 280.56 ms. Allocated memory was 86.0 MB in the beginning and 104.9 MB in the end (delta: 18.9 MB). Free memory was 55.1 MB in the beginning and 83.1 MB in the end (delta: -28.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 35.84 ms. Allocated memory is still 104.9 MB. Free memory was 83.1 MB in the beginning and 81.5 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 38.35 ms. Allocated memory is still 104.9 MB. Free memory was 81.5 MB in the beginning and 80.3 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 477.23 ms. Allocated memory is still 104.9 MB. Free memory was 80.3 MB in the beginning and 69.0 MB in the end (delta: 11.3 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 599.11 ms. Allocated memory is still 104.9 MB. Free memory was 69.0 MB in the beginning and 48.9 MB in the end (delta: 20.1 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. * Witness Printer took 3.80 ms. Allocated memory is still 104.9 MB. Free memory is still 48.9 MB. There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 9]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() 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) [L9] __assert_fail("0", "loop1-2.c", 9, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 13 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: 12 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=13occurred 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, 13 NumberOfCodeBlocks, 13 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 5 ConstructedInterpolants, 0 QuantifiedInterpolants, 25 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-a4ecdab [2020-11-29 20:13:03,033 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-29 20:13:03,035 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-29 20:13:03,104 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-29 20:13:03,105 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-29 20:13:03,111 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-29 20:13:03,113 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-29 20:13:03,118 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-29 20:13:03,121 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-29 20:13:03,127 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-29 20:13:03,129 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-29 20:13:03,137 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-29 20:13:03,137 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-29 20:13:03,141 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-29 20:13:03,143 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-29 20:13:03,145 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-29 20:13:03,146 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-29 20:13:03,151 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-29 20:13:03,156 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-29 20:13:03,162 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-29 20:13:03,169 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-29 20:13:03,171 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-29 20:13:03,173 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-29 20:13:03,176 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-29 20:13:03,183 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-29 20:13:03,187 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-29 20:13:03,187 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-29 20:13:03,189 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-29 20:13:03,191 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-29 20:13:03,192 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-29 20:13:03,193 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-29 20:13:03,194 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-29 20:13:03,196 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-29 20:13:03,197 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-29 20:13:03,198 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-29 20:13:03,198 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-29 20:13:03,199 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-29 20:13:03,200 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-29 20:13:03,200 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-29 20:13:03,202 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-29 20:13:03,203 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-29 20:13:03,204 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_5c72f56f-c187-4779-91da-c768b16fed7a/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2020-11-29 20:13:03,263 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-29 20:13:03,263 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-29 20:13:03,267 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-29 20:13:03,267 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-29 20:13:03,267 INFO L138 SettingsManager]: * Use SBE=true [2020-11-29 20:13:03,268 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-29 20:13:03,268 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-29 20:13:03,268 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-29 20:13:03,268 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-29 20:13:03,269 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-29 20:13:03,270 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-29 20:13:03,270 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-29 20:13:03,271 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2020-11-29 20:13:03,271 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2020-11-29 20:13:03,271 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-29 20:13:03,271 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-29 20:13:03,272 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-29 20:13:03,272 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-29 20:13:03,272 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-29 20:13:03,272 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-29 20:13:03,273 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-29 20:13:03,273 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-29 20:13:03,273 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-29 20:13:03,273 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-29 20:13:03,274 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-29 20:13:03,274 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-29 20:13:03,274 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2020-11-29 20:13:03,274 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2020-11-29 20:13:03,274 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-29 20:13:03,275 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-29 20:13:03,275 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-29 20:13:03,275 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_5c72f56f-c187-4779-91da-c768b16fed7a/bin/uautomizer/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_5c72f56f-c187-4779-91da-c768b16fed7a/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a0e23aa9bbb10ea2680f8206f9d74b19166b1199 [2020-11-29 20:13:03,736 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-29 20:13:03,780 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-29 20:13:03,783 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-29 20:13:03,785 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-29 20:13:03,787 INFO L275 PluginConnector]: CDTParser initialized [2020-11-29 20:13:03,788 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_5c72f56f-c187-4779-91da-c768b16fed7a/bin/uautomizer/../../sv-benchmarks/c/loop-floats-scientific-comp/loop1-2.c [2020-11-29 20:13:03,877 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_5c72f56f-c187-4779-91da-c768b16fed7a/bin/uautomizer/data/059715025/42e70241947d4f3a8d322e48273b6fb5/FLAG0320460a2 [2020-11-29 20:13:04,445 INFO L306 CDTParser]: Found 1 translation units. [2020-11-29 20:13:04,446 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_5c72f56f-c187-4779-91da-c768b16fed7a/sv-benchmarks/c/loop-floats-scientific-comp/loop1-2.c [2020-11-29 20:13:04,453 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_5c72f56f-c187-4779-91da-c768b16fed7a/bin/uautomizer/data/059715025/42e70241947d4f3a8d322e48273b6fb5/FLAG0320460a2 [2020-11-29 20:13:04,793 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_5c72f56f-c187-4779-91da-c768b16fed7a/bin/uautomizer/data/059715025/42e70241947d4f3a8d322e48273b6fb5 [2020-11-29 20:13:04,796 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-29 20:13:04,798 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-29 20:13:04,800 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-29 20:13:04,800 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-29 20:13:04,804 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-29 20:13:04,805 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 08:13:04" (1/1) ... [2020-11-29 20:13:04,808 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2d737d98 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:13:04, skipping insertion in model container [2020-11-29 20:13:04,808 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 08:13:04" (1/1) ... [2020-11-29 20:13:04,817 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-29 20:13:04,832 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-29 20:13:05,014 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 20:13:05,029 INFO L203 MainTranslator]: Completed pre-run [2020-11-29 20:13:05,049 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 20:13:05,067 INFO L208 MainTranslator]: Completed translation [2020-11-29 20:13:05,068 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:13:05 WrapperNode [2020-11-29 20:13:05,068 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-29 20:13:05,069 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-29 20:13:05,070 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-29 20:13:05,070 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-29 20:13:05,078 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:13:05" (1/1) ... [2020-11-29 20:13:05,089 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:13:05" (1/1) ... [2020-11-29 20:13:05,119 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-29 20:13:05,120 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-29 20:13:05,121 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-29 20:13:05,121 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-29 20:13:05,130 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:13:05" (1/1) ... [2020-11-29 20:13:05,130 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:13:05" (1/1) ... [2020-11-29 20:13:05,133 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:13:05" (1/1) ... [2020-11-29 20:13:05,134 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:13:05" (1/1) ... [2020-11-29 20:13:05,164 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:13:05" (1/1) ... [2020-11-29 20:13:05,169 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:13:05" (1/1) ... [2020-11-29 20:13:05,172 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:13:05" (1/1) ... [2020-11-29 20:13:05,175 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-29 20:13:05,189 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-29 20:13:05,189 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-29 20:13:05,189 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-29 20:13:05,190 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:13:05" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5c72f56f-c187-4779-91da-c768b16fed7a/bin/uautomizer/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 [2020-11-29 20:13:05,254 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2020-11-29 20:13:05,254 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-29 20:13:05,255 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-29 20:13:05,255 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-29 20:13:09,112 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-29 20:13:09,112 INFO L298 CfgBuilder]: Removed 9 assume(true) statements. [2020-11-29 20:13:09,115 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 08:13:09 BoogieIcfgContainer [2020-11-29 20:13:09,115 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-29 20:13:09,125 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-29 20:13:09,126 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-29 20:13:09,129 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-29 20:13:09,129 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 08:13:04" (1/3) ... [2020-11-29 20:13:09,130 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@329f65ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 08:13:09, skipping insertion in model container [2020-11-29 20:13:09,130 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:13:05" (2/3) ... [2020-11-29 20:13:09,131 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@329f65ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 08:13:09, skipping insertion in model container [2020-11-29 20:13:09,131 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 08:13:09" (3/3) ... [2020-11-29 20:13:09,133 INFO L111 eAbstractionObserver]: Analyzing ICFG loop1-2.c [2020-11-29 20:13:09,164 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-29 20:13:09,184 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-29 20:13:09,196 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-29 20:13:09,221 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-29 20:13:09,222 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-29 20:13:09,222 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-29 20:13:09,222 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-29 20:13:09,222 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-29 20:13:09,222 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-29 20:13:09,223 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-29 20:13:09,223 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-29 20:13:09,236 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states. [2020-11-29 20:13:09,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-11-29 20:13:09,241 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:13:09,242 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-11-29 20:13:09,242 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:13:09,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:13:09,248 INFO L82 PathProgramCache]: Analyzing trace with hash 889906919, now seen corresponding path program 1 times [2020-11-29 20:13:09,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-11-29 20:13:09,260 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2126871613] [2020-11-29 20:13:09,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5c72f56f-c187-4779-91da-c768b16fed7a/bin/uautomizer/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 [2020-11-29 20:13:09,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:13:09,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 1 conjunts are in the unsatisfiable core [2020-11-29 20:13:09,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:13:09,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:13:09,757 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-29 20:13:09,760 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:13:09,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2126871613] [2020-11-29 20:13:09,762 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-29 20:13:09,762 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2020-11-29 20:13:09,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534733418] [2020-11-29 20:13:09,768 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-11-29 20:13:09,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-11-29 20:13:09,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-11-29 20:13:09,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-29 20:13:09,784 INFO L87 Difference]: Start difference. First operand 13 states. Second operand 2 states. [2020-11-29 20:13:09,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:13:09,799 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2020-11-29 20:13:09,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-29 20:13:09,800 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2020-11-29 20:13:09,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:13:09,809 INFO L225 Difference]: With dead ends: 21 [2020-11-29 20:13:09,809 INFO L226 Difference]: Without dead ends: 8 [2020-11-29 20:13:09,812 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-29 20:13:09,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2020-11-29 20:13:09,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2020-11-29 20:13:09,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-11-29 20:13:09,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2020-11-29 20:13:09,843 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2020-11-29 20:13:09,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:13:09,844 INFO L481 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2020-11-29 20:13:09,844 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-11-29 20:13:09,845 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2020-11-29 20:13:09,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-11-29 20:13:09,845 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:13:09,845 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:13:10,063 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-11-29 20:13:10,064 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:13:10,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:13:10,070 INFO L82 PathProgramCache]: Analyzing trace with hash 1810664400, now seen corresponding path program 1 times [2020-11-29 20:13:10,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-11-29 20:13:10,075 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1848707944] [2020-11-29 20:13:10,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5c72f56f-c187-4779-91da-c768b16fed7a/bin/uautomizer/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 [2020-11-29 20:13:10,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 20:13:10,776 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 20:13:11,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 20:13:11,409 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 20:13:11,461 INFO L173 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2020-11-29 20:13:11,461 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-29 20:13:11,662 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-11-29 20:13:11,694 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.11 08:13:11 BoogieIcfgContainer [2020-11-29 20:13:11,695 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-29 20:13:11,696 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-29 20:13:11,696 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-29 20:13:11,696 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-29 20:13:11,697 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 08:13:09" (3/4) ... [2020-11-29 20:13:11,699 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-11-29 20:13:11,742 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_5c72f56f-c187-4779-91da-c768b16fed7a/bin/uautomizer/witness.graphml [2020-11-29 20:13:11,742 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-29 20:13:11,744 INFO L168 Benchmark]: Toolchain (without parser) took 6945.26 ms. Allocated memory was 62.9 MB in the beginning and 86.0 MB in the end (delta: 23.1 MB). Free memory was 44.7 MB in the beginning and 48.5 MB in the end (delta: -3.8 MB). Peak memory consumption was 17.1 MB. Max. memory is 16.1 GB. [2020-11-29 20:13:11,745 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 62.9 MB. Free memory is still 45.9 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 20:13:11,746 INFO L168 Benchmark]: CACSL2BoogieTranslator took 269.02 ms. Allocated memory is still 62.9 MB. Free memory was 44.6 MB in the beginning and 34.4 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-11-29 20:13:11,746 INFO L168 Benchmark]: Boogie Procedure Inliner took 50.35 ms. Allocated memory is still 62.9 MB. Free memory was 34.4 MB in the beginning and 47.6 MB in the end (delta: -13.2 MB). Peak memory consumption was 3.2 MB. Max. memory is 16.1 GB. [2020-11-29 20:13:11,747 INFO L168 Benchmark]: Boogie Preprocessor took 67.42 ms. Allocated memory is still 62.9 MB. Free memory was 47.6 MB in the beginning and 46.3 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 20:13:11,748 INFO L168 Benchmark]: RCFGBuilder took 3926.31 ms. Allocated memory is still 62.9 MB. Free memory was 46.3 MB in the beginning and 34.6 MB in the end (delta: 11.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-11-29 20:13:11,749 INFO L168 Benchmark]: TraceAbstraction took 2569.55 ms. Allocated memory was 62.9 MB in the beginning and 86.0 MB in the end (delta: 23.1 MB). Free memory was 34.2 MB in the beginning and 50.6 MB in the end (delta: -16.4 MB). Peak memory consumption was 7.7 MB. Max. memory is 16.1 GB. [2020-11-29 20:13:11,750 INFO L168 Benchmark]: Witness Printer took 46.59 ms. Allocated memory is still 86.0 MB. Free memory was 50.6 MB in the beginning and 48.5 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 20:13:11,754 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 62.9 MB. Free memory is still 45.9 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 269.02 ms. Allocated memory is still 62.9 MB. Free memory was 44.6 MB in the beginning and 34.4 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 50.35 ms. Allocated memory is still 62.9 MB. Free memory was 34.4 MB in the beginning and 47.6 MB in the end (delta: -13.2 MB). Peak memory consumption was 3.2 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 67.42 ms. Allocated memory is still 62.9 MB. Free memory was 47.6 MB in the beginning and 46.3 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 3926.31 ms. Allocated memory is still 62.9 MB. Free memory was 46.3 MB in the beginning and 34.6 MB in the end (delta: 11.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 2569.55 ms. Allocated memory was 62.9 MB in the beginning and 86.0 MB in the end (delta: 23.1 MB). Free memory was 34.2 MB in the beginning and 50.6 MB in the end (delta: -16.4 MB). Peak memory consumption was 7.7 MB. Max. memory is 16.1 GB. * Witness Printer took 46.59 ms. Allocated memory is still 86.0 MB. Free memory was 50.6 MB in the beginning and 48.5 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 9]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_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) [L9] __assert_fail("0", "loop1-2.c", 9, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 13 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 2.4s, 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, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=13occurred 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, 0.9s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 13 NumberOfCodeBlocks, 13 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 10 ConstructedInterpolants, 0 QuantifiedInterpolants, 50 SizeOfPredicates, 0 NumberOfNonLiveVariables, 32 ConjunctsInSsa, 1 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...