./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-floats-scientific-comp/loop2-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b2eff8ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b6f48e-543d-4429-b87d-3864919f019b/bin/utaipan-SDwSMHVbGG/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b6f48e-543d-4429-b87d-3864919f019b/bin/utaipan-SDwSMHVbGG/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b6f48e-543d-4429-b87d-3864919f019b/bin/utaipan-SDwSMHVbGG/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b6f48e-543d-4429-b87d-3864919f019b/bin/utaipan-SDwSMHVbGG/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-floats-scientific-comp/loop2-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b6f48e-543d-4429-b87d-3864919f019b/bin/utaipan-SDwSMHVbGG/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b6f48e-543d-4429-b87d-3864919f019b/bin/utaipan-SDwSMHVbGG --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 1b47128f3a13b8a14fa5679442cf3dce52b78403c71ab556b465499f91ebd451 ............................................................................................................................................................................................................................................................................................................... Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b6f48e-543d-4429-b87d-3864919f019b/bin/utaipan-SDwSMHVbGG/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b6f48e-543d-4429-b87d-3864919f019b/bin/utaipan-SDwSMHVbGG/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b6f48e-543d-4429-b87d-3864919f019b/bin/utaipan-SDwSMHVbGG/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b6f48e-543d-4429-b87d-3864919f019b/bin/utaipan-SDwSMHVbGG/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-floats-scientific-comp/loop2-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b6f48e-543d-4429-b87d-3864919f019b/bin/utaipan-SDwSMHVbGG/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b6f48e-543d-4429-b87d-3864919f019b/bin/utaipan-SDwSMHVbGG --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 1b47128f3a13b8a14fa5679442cf3dce52b78403c71ab556b465499f91ebd451 ............................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-b2eff8b [2021-10-29 04:47:51,090 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-29 04:47:51,093 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-29 04:47:51,149 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-29 04:47:51,150 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-29 04:47:51,155 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-29 04:47:51,158 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-29 04:47:51,162 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-29 04:47:51,164 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-29 04:47:51,172 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-29 04:47:51,173 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-29 04:47:51,175 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-29 04:47:51,175 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-29 04:47:51,178 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-29 04:47:51,180 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-29 04:47:51,191 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-29 04:47:51,192 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-29 04:47:51,193 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-29 04:47:51,195 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-29 04:47:51,202 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-29 04:47:51,204 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-29 04:47:51,205 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-29 04:47:51,208 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-29 04:47:51,209 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-29 04:47:51,213 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-29 04:47:51,214 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-29 04:47:51,214 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-29 04:47:51,216 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-29 04:47:51,216 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-29 04:47:51,218 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-29 04:47:51,218 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-29 04:47:51,219 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-29 04:47:51,221 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-29 04:47:51,222 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-29 04:47:51,223 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-29 04:47:51,224 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-29 04:47:51,224 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-29 04:47:51,225 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-29 04:47:51,225 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-29 04:47:51,226 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-29 04:47:51,226 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-29 04:47:51,227 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b6f48e-543d-4429-b87d-3864919f019b/bin/utaipan-SDwSMHVbGG/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-29 04:47:51,268 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-29 04:47:51,273 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-29 04:47:51,275 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-29 04:47:51,275 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-29 04:47:51,276 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-29 04:47:51,276 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-29 04:47:51,276 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-29 04:47:51,276 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-29 04:47:51,282 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-29 04:47:51,283 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-29 04:47:51,284 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-29 04:47:51,284 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-29 04:47:51,284 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-29 04:47:51,284 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-29 04:47:51,285 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-29 04:47:51,285 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-29 04:47:51,286 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-29 04:47:51,286 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-29 04:47:51,286 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-29 04:47:51,286 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-29 04:47:51,286 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-29 04:47:51,287 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-29 04:47:51,287 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-29 04:47:51,287 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-29 04:47:51,287 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-29 04:47:51,288 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-29 04:47:51,288 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-29 04:47:51,288 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-29 04:47:51,288 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-29 04:47:51,290 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-29 04:47:51,290 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-29 04:47:51,290 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-29 04:47:51,291 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-29 04:47:51,291 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-29 04:47:51,291 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-29 04:47:51,291 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-29 04:47:51,292 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-29 04:47:51,292 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-29 04:47:51,292 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-29 04:47:51,292 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b6f48e-543d-4429-b87d-3864919f019b/bin/utaipan-SDwSMHVbGG/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b6f48e-543d-4429-b87d-3864919f019b/bin/utaipan-SDwSMHVbGG Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1b47128f3a13b8a14fa5679442cf3dce52b78403c71ab556b465499f91ebd451 [2021-10-29 04:47:51,596 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-29 04:47:51,656 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-29 04:47:51,659 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-29 04:47:51,660 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-29 04:47:51,661 INFO L275 PluginConnector]: CDTParser initialized [2021-10-29 04:47:51,661 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b6f48e-543d-4429-b87d-3864919f019b/bin/utaipan-SDwSMHVbGG/../../sv-benchmarks/c/loop-floats-scientific-comp/loop2-1.c [2021-10-29 04:47:51,718 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b6f48e-543d-4429-b87d-3864919f019b/bin/utaipan-SDwSMHVbGG/data/41ad9dcf1/6baabd9f50384e92a3d65fa1ccd3106b/FLAG277c04890 [2021-10-29 04:47:52,127 INFO L306 CDTParser]: Found 1 translation units. [2021-10-29 04:47:52,127 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b6f48e-543d-4429-b87d-3864919f019b/sv-benchmarks/c/loop-floats-scientific-comp/loop2-1.c [2021-10-29 04:47:52,134 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b6f48e-543d-4429-b87d-3864919f019b/bin/utaipan-SDwSMHVbGG/data/41ad9dcf1/6baabd9f50384e92a3d65fa1ccd3106b/FLAG277c04890 [2021-10-29 04:47:52,526 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b6f48e-543d-4429-b87d-3864919f019b/bin/utaipan-SDwSMHVbGG/data/41ad9dcf1/6baabd9f50384e92a3d65fa1ccd3106b [2021-10-29 04:47:52,528 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-29 04:47:52,529 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-29 04:47:52,531 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-29 04:47:52,531 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-29 04:47:52,534 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-29 04:47:52,534 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 04:47:52" (1/1) ... [2021-10-29 04:47:52,535 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@27c1018d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 04:47:52, skipping insertion in model container [2021-10-29 04:47:52,535 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 04:47:52" (1/1) ... [2021-10-29 04:47:52,550 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-29 04:47:52,562 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-29 04:47:52,671 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b6f48e-543d-4429-b87d-3864919f019b/sv-benchmarks/c/loop-floats-scientific-comp/loop2-1.c[474,487] [2021-10-29 04:47:52,689 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-29 04:47:52,697 INFO L203 MainTranslator]: Completed pre-run [2021-10-29 04:47:52,710 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b6f48e-543d-4429-b87d-3864919f019b/sv-benchmarks/c/loop-floats-scientific-comp/loop2-1.c[474,487] [2021-10-29 04:47:52,717 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-29 04:47:52,735 INFO L208 MainTranslator]: Completed translation [2021-10-29 04:47:52,735 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 04:47:52 WrapperNode [2021-10-29 04:47:52,735 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-29 04:47:52,737 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-29 04:47:52,737 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-29 04:47:52,737 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-29 04:47:52,745 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 04:47:52" (1/1) ... [2021-10-29 04:47:52,752 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 04:47:52" (1/1) ... [2021-10-29 04:47:52,771 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-29 04:47:52,772 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-29 04:47:52,772 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-29 04:47:52,773 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-29 04:47:52,781 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 04:47:52" (1/1) ... [2021-10-29 04:47:52,781 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 04:47:52" (1/1) ... [2021-10-29 04:47:52,783 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 04:47:52" (1/1) ... [2021-10-29 04:47:52,783 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 04:47:52" (1/1) ... [2021-10-29 04:47:52,788 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 04:47:52" (1/1) ... [2021-10-29 04:47:52,792 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 04:47:52" (1/1) ... [2021-10-29 04:47:52,793 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 04:47:52" (1/1) ... [2021-10-29 04:47:52,795 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-29 04:47:52,796 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-29 04:47:52,796 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-29 04:47:52,796 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-29 04:47:52,797 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 04:47:52" (1/1) ... [2021-10-29 04:47:52,805 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-29 04:47:52,819 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b6f48e-543d-4429-b87d-3864919f019b/bin/utaipan-SDwSMHVbGG/z3 [2021-10-29 04:47:52,846 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b6f48e-543d-4429-b87d-3864919f019b/bin/utaipan-SDwSMHVbGG/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-29 04:47:52,856 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b6f48e-543d-4429-b87d-3864919f019b/bin/utaipan-SDwSMHVbGG/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-29 04:47:52,896 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-29 04:47:52,897 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-29 04:47:52,898 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-29 04:47:52,918 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-29 04:47:53,231 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-29 04:47:53,231 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2021-10-29 04:47:53,233 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 04:47:53 BoogieIcfgContainer [2021-10-29 04:47:53,234 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-29 04:47:53,235 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-29 04:47:53,236 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-29 04:47:53,239 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-29 04:47:53,239 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 04:47:52" (1/3) ... [2021-10-29 04:47:53,240 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@554556bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 04:47:53, skipping insertion in model container [2021-10-29 04:47:53,240 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 04:47:52" (2/3) ... [2021-10-29 04:47:53,240 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@554556bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 04:47:53, skipping insertion in model container [2021-10-29 04:47:53,241 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 04:47:53" (3/3) ... [2021-10-29 04:47:53,242 INFO L111 eAbstractionObserver]: Analyzing ICFG loop2-1.c [2021-10-29 04:47:53,247 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-29 04:47:53,247 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-29 04:47:53,294 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-29 04:47:53,300 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-29 04:47:53,300 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-29 04:47:53,328 INFO L276 IsEmpty]: Start isEmpty. Operand has 9 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 8 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 04:47:53,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-29 04:47:53,334 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 04:47:53,340 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-29 04:47:53,341 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 04:47:53,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 04:47:53,346 INFO L85 PathProgramCache]: Analyzing trace with hash 80052486, now seen corresponding path program 1 times [2021-10-29 04:47:53,355 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 04:47:53,363 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734556213] [2021-10-29 04:47:53,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 04:47:53,370 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 04:47:53,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 04:47:53,595 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 04:47:53,596 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 04:47:53,597 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734556213] [2021-10-29 04:47:53,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734556213] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-29 04:47:53,598 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-29 04:47:53,599 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-29 04:47:53,601 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294563117] [2021-10-29 04:47:53,605 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-29 04:47:53,605 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 04:47:53,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-29 04:47:53,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-29 04:47:53,626 INFO L87 Difference]: Start difference. First operand has 9 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 8 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 04:47:53,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 04:47:53,642 INFO L93 Difference]: Finished difference Result 15 states and 17 transitions. [2021-10-29 04:47:53,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-29 04:47:53,643 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-10-29 04:47:53,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 04:47:53,672 INFO L225 Difference]: With dead ends: 15 [2021-10-29 04:47:53,672 INFO L226 Difference]: Without dead ends: 7 [2021-10-29 04:47:53,674 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-29 04:47:53,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2021-10-29 04:47:53,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2021-10-29 04:47:53,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 04:47:53,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2021-10-29 04:47:53,708 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 5 [2021-10-29 04:47:53,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 04:47:53,708 INFO L470 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2021-10-29 04:47:53,709 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 04:47:53,709 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2021-10-29 04:47:53,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-29 04:47:53,710 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 04:47:53,710 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-29 04:47:53,710 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-29 04:47:53,711 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 04:47:53,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 04:47:53,717 INFO L85 PathProgramCache]: Analyzing trace with hash -1807980756, now seen corresponding path program 1 times [2021-10-29 04:47:53,717 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 04:47:53,717 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963313981] [2021-10-29 04:47:53,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 04:47:53,718 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 04:47:53,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-29 04:47:53,771 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-29 04:47:53,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-29 04:47:53,824 INFO L133 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-10-29 04:47:53,824 INFO L627 BasicCegarLoop]: Counterexample is feasible [2021-10-29 04:47:53,826 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-29 04:47:53,827 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-29 04:47:53,831 INFO L731 BasicCegarLoop]: Path program histogram: [1, 1] [2021-10-29 04:47:53,833 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-29 04:47:53,855 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.10 04:47:53 BoogieIcfgContainer [2021-10-29 04:47:53,855 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-29 04:47:53,856 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-29 04:47:53,856 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-29 04:47:53,856 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-29 04:47:53,857 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 04:47:53" (3/4) ... [2021-10-29 04:47:53,859 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-29 04:47:53,859 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-29 04:47:53,861 INFO L168 Benchmark]: Toolchain (without parser) took 1330.81 ms. Allocated memory was 96.5 MB in the beginning and 117.4 MB in the end (delta: 21.0 MB). Free memory was 58.7 MB in the beginning and 84.8 MB in the end (delta: -26.1 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-29 04:47:53,862 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 96.5 MB. Free memory was 75.4 MB in the beginning and 75.3 MB in the end (delta: 65.9 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-29 04:47:53,863 INFO L168 Benchmark]: CACSL2BoogieTranslator took 205.28 ms. Allocated memory is still 96.5 MB. Free memory was 58.5 MB in the beginning and 48.5 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-29 04:47:53,863 INFO L168 Benchmark]: Boogie Procedure Inliner took 34.96 ms. Allocated memory is still 96.5 MB. Free memory was 48.4 MB in the beginning and 46.9 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-29 04:47:53,864 INFO L168 Benchmark]: Boogie Preprocessor took 23.15 ms. Allocated memory is still 96.5 MB. Free memory was 46.9 MB in the beginning and 45.8 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-29 04:47:53,865 INFO L168 Benchmark]: RCFGBuilder took 437.83 ms. Allocated memory was 96.5 MB in the beginning and 117.4 MB in the end (delta: 21.0 MB). Free memory was 45.7 MB in the beginning and 85.6 MB in the end (delta: -40.0 MB). Peak memory consumption was 8.2 MB. Max. memory is 16.1 GB. [2021-10-29 04:47:53,866 INFO L168 Benchmark]: TraceAbstraction took 619.98 ms. Allocated memory is still 117.4 MB. Free memory was 85.1 MB in the beginning and 85.3 MB in the end (delta: -257.6 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-29 04:47:53,866 INFO L168 Benchmark]: Witness Printer took 3.17 ms. Allocated memory is still 117.4 MB. Free memory is still 85.3 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-29 04:47:53,870 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 96.5 MB. Free memory was 75.4 MB in the beginning and 75.3 MB in the end (delta: 65.9 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 205.28 ms. Allocated memory is still 96.5 MB. Free memory was 58.5 MB in the beginning and 48.5 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 34.96 ms. Allocated memory is still 96.5 MB. Free memory was 48.4 MB in the beginning and 46.9 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 23.15 ms. Allocated memory is still 96.5 MB. Free memory was 46.9 MB in the beginning and 45.8 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 437.83 ms. Allocated memory was 96.5 MB in the beginning and 117.4 MB in the end (delta: 21.0 MB). Free memory was 45.7 MB in the beginning and 85.6 MB in the end (delta: -40.0 MB). Peak memory consumption was 8.2 MB. Max. memory is 16.1 GB. * TraceAbstraction took 619.98 ms. Allocated memory is still 117.4 MB. Free memory was 85.1 MB in the beginning and 85.3 MB in the end (delta: -257.6 kB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 3.17 ms. Allocated memory is still 117.4 MB. Free memory is still 85.3 MB. There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 12]: 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 49, overapproximation of someBinaryArithmeticFLOAToperation at line 32. Possible FailurePath: [L14] float pi = 3.14159 ; [L20] float x = __VERIFIER_nondet_float() ; [L21] float octant = pi/3 ; [L10] COND FALSE !(!cond) [L23] float oddExp = x ; [L24] float evenExp = 1.0 ; [L25] float term = x ; [L26] unsigned int count = 2 ; [L27] int multFactor = 0 ; [L28] int temp ; VAL [pi=314159/100000] [L30] COND TRUE 1 [L32] term = term * (x/count) [L33] EXPR (count>>1 % 2 == 0) ? 1 : -1 [L33] multFactor = (count>>1 % 2 == 0) ? 1 : -1 [L35] evenExp = evenExp + multFactor*term [L37] count++ [L39] term = term * (x/count) [L41] oddExp = oddExp + multFactor*term [L43] count++ [L45] temp = __VERIFIER_nondet_int() [L46] COND TRUE temp == 0 VAL [pi=314159/100000] [L12] COND TRUE !(cond) VAL [pi=314159/100000] [L12] reach_error() VAL [pi=314159/100000] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 9 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 0.5s, OverallIterations: 2, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 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, InterpolantAutomatonStates: 2, 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, 4 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 [2021-10-29 04:47:53,918 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b6f48e-543d-4429-b87d-3864919f019b/bin/utaipan-SDwSMHVbGG/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.1-dev-b2eff8b [2021-10-29 04:47:56,466 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-29 04:47:56,470 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-29 04:47:56,521 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-29 04:47:56,522 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-29 04:47:56,526 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-29 04:47:56,528 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-29 04:47:56,533 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-29 04:47:56,536 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-29 04:47:56,544 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-29 04:47:56,545 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-29 04:47:56,547 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-29 04:47:56,548 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-29 04:47:56,550 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-29 04:47:56,552 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-29 04:47:56,557 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-29 04:47:56,559 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-29 04:47:56,560 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-29 04:47:56,563 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-29 04:47:56,571 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-29 04:47:56,573 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-29 04:47:56,574 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-29 04:47:56,578 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-29 04:47:56,580 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-29 04:47:56,589 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-29 04:47:56,590 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-29 04:47:56,590 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-29 04:47:56,592 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-29 04:47:56,593 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-29 04:47:56,594 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-29 04:47:56,595 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-29 04:47:56,596 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-29 04:47:56,598 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-29 04:47:56,599 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-29 04:47:56,601 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-29 04:47:56,602 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-29 04:47:56,603 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-29 04:47:56,603 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-29 04:47:56,620 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-29 04:47:56,621 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-29 04:47:56,622 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-29 04:47:56,623 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b6f48e-543d-4429-b87d-3864919f019b/bin/utaipan-SDwSMHVbGG/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-10-29 04:47:56,677 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-29 04:47:56,677 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-29 04:47:56,679 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-29 04:47:56,679 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-29 04:47:56,679 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-29 04:47:56,679 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-29 04:47:56,680 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-29 04:47:56,680 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-29 04:47:56,680 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-29 04:47:56,682 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-29 04:47:56,683 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-29 04:47:56,683 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-29 04:47:56,683 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-29 04:47:56,684 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-29 04:47:56,684 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-29 04:47:56,684 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-29 04:47:56,684 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-29 04:47:56,684 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-29 04:47:56,685 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-29 04:47:56,685 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-29 04:47:56,685 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-29 04:47:56,685 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-29 04:47:56,685 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-29 04:47:56,686 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-29 04:47:56,686 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-29 04:47:56,686 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-29 04:47:56,686 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-29 04:47:56,687 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-29 04:47:56,687 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-29 04:47:56,687 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-29 04:47:56,687 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-10-29 04:47:56,688 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-29 04:47:56,688 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-29 04:47:56,688 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-29 04:47:56,689 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-29 04:47:56,689 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b6f48e-543d-4429-b87d-3864919f019b/bin/utaipan-SDwSMHVbGG/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b6f48e-543d-4429-b87d-3864919f019b/bin/utaipan-SDwSMHVbGG Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1b47128f3a13b8a14fa5679442cf3dce52b78403c71ab556b465499f91ebd451 [2021-10-29 04:47:57,096 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-29 04:47:57,128 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-29 04:47:57,131 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-29 04:47:57,133 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-29 04:47:57,134 INFO L275 PluginConnector]: CDTParser initialized [2021-10-29 04:47:57,137 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b6f48e-543d-4429-b87d-3864919f019b/bin/utaipan-SDwSMHVbGG/../../sv-benchmarks/c/loop-floats-scientific-comp/loop2-1.c [2021-10-29 04:47:57,217 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b6f48e-543d-4429-b87d-3864919f019b/bin/utaipan-SDwSMHVbGG/data/e59b4dc97/08aa17627e8a44a1b6cbf2e3dc58f7c7/FLAGb5569b519 [2021-10-29 04:47:57,775 INFO L306 CDTParser]: Found 1 translation units. [2021-10-29 04:47:57,775 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b6f48e-543d-4429-b87d-3864919f019b/sv-benchmarks/c/loop-floats-scientific-comp/loop2-1.c [2021-10-29 04:47:57,782 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b6f48e-543d-4429-b87d-3864919f019b/bin/utaipan-SDwSMHVbGG/data/e59b4dc97/08aa17627e8a44a1b6cbf2e3dc58f7c7/FLAGb5569b519 [2021-10-29 04:47:58,126 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b6f48e-543d-4429-b87d-3864919f019b/bin/utaipan-SDwSMHVbGG/data/e59b4dc97/08aa17627e8a44a1b6cbf2e3dc58f7c7 [2021-10-29 04:47:58,129 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-29 04:47:58,130 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-29 04:47:58,131 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-29 04:47:58,132 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-29 04:47:58,144 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-29 04:47:58,144 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 04:47:58" (1/1) ... [2021-10-29 04:47:58,145 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@640ff979 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 04:47:58, skipping insertion in model container [2021-10-29 04:47:58,146 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 04:47:58" (1/1) ... [2021-10-29 04:47:58,155 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-29 04:47:58,172 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-29 04:47:58,305 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b6f48e-543d-4429-b87d-3864919f019b/sv-benchmarks/c/loop-floats-scientific-comp/loop2-1.c[474,487] [2021-10-29 04:47:58,324 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-29 04:47:58,336 INFO L203 MainTranslator]: Completed pre-run [2021-10-29 04:47:58,357 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b6f48e-543d-4429-b87d-3864919f019b/sv-benchmarks/c/loop-floats-scientific-comp/loop2-1.c[474,487] [2021-10-29 04:47:58,393 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-29 04:47:58,407 INFO L208 MainTranslator]: Completed translation [2021-10-29 04:47:58,408 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 04:47:58 WrapperNode [2021-10-29 04:47:58,408 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-29 04:47:58,409 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-29 04:47:58,409 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-29 04:47:58,409 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-29 04:47:58,417 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 04:47:58" (1/1) ... [2021-10-29 04:47:58,427 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 04:47:58" (1/1) ... [2021-10-29 04:47:58,447 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-29 04:47:58,447 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-29 04:47:58,448 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-29 04:47:58,448 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-29 04:47:58,457 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 04:47:58" (1/1) ... [2021-10-29 04:47:58,458 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 04:47:58" (1/1) ... [2021-10-29 04:47:58,469 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 04:47:58" (1/1) ... [2021-10-29 04:47:58,470 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 04:47:58" (1/1) ... [2021-10-29 04:47:58,486 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 04:47:58" (1/1) ... [2021-10-29 04:47:58,490 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 04:47:58" (1/1) ... [2021-10-29 04:47:58,492 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 04:47:58" (1/1) ... [2021-10-29 04:47:58,495 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-29 04:47:58,496 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-29 04:47:58,496 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-29 04:47:58,496 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-29 04:47:58,504 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 04:47:58" (1/1) ... [2021-10-29 04:47:58,511 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-29 04:47:58,528 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b6f48e-543d-4429-b87d-3864919f019b/bin/utaipan-SDwSMHVbGG/z3 [2021-10-29 04:47:58,539 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b6f48e-543d-4429-b87d-3864919f019b/bin/utaipan-SDwSMHVbGG/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-29 04:47:58,567 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b6f48e-543d-4429-b87d-3864919f019b/bin/utaipan-SDwSMHVbGG/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-29 04:47:58,588 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-29 04:47:58,589 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-29 04:47:58,589 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-29 04:47:58,589 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-29 04:48:03,627 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-29 04:48:03,627 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2021-10-29 04:48:03,629 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 04:48:03 BoogieIcfgContainer [2021-10-29 04:48:03,629 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-29 04:48:03,630 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-29 04:48:03,631 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-29 04:48:03,633 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-29 04:48:03,633 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 04:47:58" (1/3) ... [2021-10-29 04:48:03,634 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f16c418 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 04:48:03, skipping insertion in model container [2021-10-29 04:48:03,634 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 04:47:58" (2/3) ... [2021-10-29 04:48:03,634 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f16c418 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 04:48:03, skipping insertion in model container [2021-10-29 04:48:03,634 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 04:48:03" (3/3) ... [2021-10-29 04:48:03,636 INFO L111 eAbstractionObserver]: Analyzing ICFG loop2-1.c [2021-10-29 04:48:03,640 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-29 04:48:03,640 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-29 04:48:03,692 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-29 04:48:03,699 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-29 04:48:03,699 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-29 04:48:03,712 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 14 states have (on average 1.5) internal successors, (21), 15 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 04:48:03,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-29 04:48:03,717 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 04:48:03,718 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 04:48:03,718 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 04:48:03,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 04:48:03,724 INFO L85 PathProgramCache]: Analyzing trace with hash 119997515, now seen corresponding path program 1 times [2021-10-29 04:48:03,736 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-29 04:48:03,736 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [773307198] [2021-10-29 04:48:03,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 04:48:03,738 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-29 04:48:03,738 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b6f48e-543d-4429-b87d-3864919f019b/bin/utaipan-SDwSMHVbGG/mathsat [2021-10-29 04:48:03,741 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b6f48e-543d-4429-b87d-3864919f019b/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-29 04:48:03,761 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b6f48e-543d-4429-b87d-3864919f019b/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-29 04:48:03,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 04:48:03,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 1 conjunts are in the unsatisfiable core [2021-10-29 04:48:03,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 04:48:04,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 04:48:04,082 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-29 04:48:04,165 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 04:48:04,165 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-29 04:48:04,166 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [773307198] [2021-10-29 04:48:04,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [773307198] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-29 04:48:04,167 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-29 04:48:04,167 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-29 04:48:04,169 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58095208] [2021-10-29 04:48:04,175 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-29 04:48:04,175 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-29 04:48:04,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-29 04:48:04,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-29 04:48:04,192 INFO L87 Difference]: Start difference. First operand has 16 states, 14 states have (on average 1.5) internal successors, (21), 15 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 04:48:04,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 04:48:04,208 INFO L93 Difference]: Finished difference Result 29 states and 38 transitions. [2021-10-29 04:48:04,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-29 04:48:04,209 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-10-29 04:48:04,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 04:48:04,218 INFO L225 Difference]: With dead ends: 29 [2021-10-29 04:48:04,218 INFO L226 Difference]: Without dead ends: 12 [2021-10-29 04:48:04,221 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-29 04:48:04,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-10-29 04:48:04,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2021-10-29 04:48:04,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 11 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 04:48:04,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2021-10-29 04:48:04,253 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 8 [2021-10-29 04:48:04,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 04:48:04,254 INFO L470 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2021-10-29 04:48:04,254 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 04:48:04,255 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2021-10-29 04:48:04,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-29 04:48:04,255 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 04:48:04,255 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 04:48:04,275 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b6f48e-543d-4429-b87d-3864919f019b/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-29 04:48:04,470 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b6f48e-543d-4429-b87d-3864919f019b/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 [2021-10-29 04:48:04,471 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 04:48:04,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 04:48:04,474 INFO L85 PathProgramCache]: Analyzing trace with hash -2105434535, now seen corresponding path program 1 times [2021-10-29 04:48:04,475 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-29 04:48:04,478 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [892642070] [2021-10-29 04:48:04,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 04:48:04,479 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-29 04:48:04,479 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b6f48e-543d-4429-b87d-3864919f019b/bin/utaipan-SDwSMHVbGG/mathsat [2021-10-29 04:48:04,480 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b6f48e-543d-4429-b87d-3864919f019b/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-29 04:48:04,521 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b6f48e-543d-4429-b87d-3864919f019b/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-29 04:48:05,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 04:48:05,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-29 04:48:05,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 04:48:05,384 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 04:48:05,385 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-29 04:48:05,503 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 04:48:05,503 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-29 04:48:05,503 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [892642070] [2021-10-29 04:48:05,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [892642070] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-29 04:48:05,505 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-29 04:48:05,505 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-10-29 04:48:05,506 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592429441] [2021-10-29 04:48:05,507 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-29 04:48:05,507 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-29 04:48:05,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-29 04:48:05,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-29 04:48:05,510 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 04:48:11,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 04:48:11,239 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2021-10-29 04:48:11,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-29 04:48:11,241 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-10-29 04:48:11,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 04:48:11,241 INFO L225 Difference]: With dead ends: 24 [2021-10-29 04:48:11,241 INFO L226 Difference]: Without dead ends: 16 [2021-10-29 04:48:11,242 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-29 04:48:11,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-10-29 04:48:11,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 14. [2021-10-29 04:48:11,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 04:48:11,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2021-10-29 04:48:11,246 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 11 [2021-10-29 04:48:11,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 04:48:11,247 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2021-10-29 04:48:11,247 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 04:48:11,247 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2021-10-29 04:48:11,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-29 04:48:11,248 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 04:48:11,248 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 04:48:11,269 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b6f48e-543d-4429-b87d-3864919f019b/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-29 04:48:11,462 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b6f48e-543d-4429-b87d-3864919f019b/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 [2021-10-29 04:48:11,463 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 04:48:11,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 04:48:11,463 INFO L85 PathProgramCache]: Analyzing trace with hash -2048176233, now seen corresponding path program 1 times [2021-10-29 04:48:11,464 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-29 04:48:11,464 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [460227249] [2021-10-29 04:48:11,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 04:48:11,464 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-29 04:48:11,465 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b6f48e-543d-4429-b87d-3864919f019b/bin/utaipan-SDwSMHVbGG/mathsat [2021-10-29 04:48:11,466 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b6f48e-543d-4429-b87d-3864919f019b/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-29 04:48:11,478 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b6f48e-543d-4429-b87d-3864919f019b/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-29 04:48:12,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-29 04:48:12,247 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-29 04:48:12,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-29 04:48:13,072 INFO L133 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2021-10-29 04:48:13,072 INFO L627 BasicCegarLoop]: Counterexample is feasible [2021-10-29 04:48:13,073 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-29 04:48:13,116 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b6f48e-543d-4429-b87d-3864919f019b/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-29 04:48:13,275 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b6f48e-543d-4429-b87d-3864919f019b/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 [2021-10-29 04:48:13,279 INFO L731 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2021-10-29 04:48:13,281 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-29 04:48:13,340 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.10 04:48:13 BoogieIcfgContainer [2021-10-29 04:48:13,342 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-29 04:48:13,343 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-29 04:48:13,343 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-29 04:48:13,343 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-29 04:48:13,343 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 04:48:03" (3/4) ... [2021-10-29 04:48:13,346 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-29 04:48:13,412 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b6f48e-543d-4429-b87d-3864919f019b/bin/utaipan-SDwSMHVbGG/witness.graphml [2021-10-29 04:48:13,422 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-29 04:48:13,424 INFO L168 Benchmark]: Toolchain (without parser) took 15293.30 ms. Allocated memory is still 71.3 MB. Free memory was 52.6 MB in the beginning and 28.5 MB in the end (delta: 24.1 MB). Peak memory consumption was 25.9 MB. Max. memory is 16.1 GB. [2021-10-29 04:48:13,425 INFO L168 Benchmark]: CDTParser took 0.30 ms. Allocated memory is still 71.3 MB. Free memory was 51.2 MB in the beginning and 51.2 MB in the end (delta: 54.9 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-29 04:48:13,437 INFO L168 Benchmark]: CACSL2BoogieTranslator took 276.95 ms. Allocated memory is still 71.3 MB. Free memory was 52.5 MB in the beginning and 53.8 MB in the end (delta: -1.3 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-10-29 04:48:13,438 INFO L168 Benchmark]: Boogie Procedure Inliner took 37.72 ms. Allocated memory is still 71.3 MB. Free memory was 53.8 MB in the beginning and 52.2 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-29 04:48:13,438 INFO L168 Benchmark]: Boogie Preprocessor took 47.72 ms. Allocated memory is still 71.3 MB. Free memory was 52.2 MB in the beginning and 51.0 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-29 04:48:13,439 INFO L168 Benchmark]: RCFGBuilder took 5133.09 ms. Allocated memory is still 71.3 MB. Free memory was 50.7 MB in the beginning and 40.5 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-29 04:48:13,440 INFO L168 Benchmark]: TraceAbstraction took 9711.27 ms. Allocated memory is still 71.3 MB. Free memory was 40.2 MB in the beginning and 30.6 MB in the end (delta: 9.6 MB). Peak memory consumption was 10.3 MB. Max. memory is 16.1 GB. [2021-10-29 04:48:13,440 INFO L168 Benchmark]: Witness Printer took 80.32 ms. Allocated memory is still 71.3 MB. Free memory was 30.6 MB in the beginning and 28.5 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-29 04:48:13,443 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30 ms. Allocated memory is still 71.3 MB. Free memory was 51.2 MB in the beginning and 51.2 MB in the end (delta: 54.9 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 276.95 ms. Allocated memory is still 71.3 MB. Free memory was 52.5 MB in the beginning and 53.8 MB in the end (delta: -1.3 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 37.72 ms. Allocated memory is still 71.3 MB. Free memory was 53.8 MB in the beginning and 52.2 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 47.72 ms. Allocated memory is still 71.3 MB. Free memory was 52.2 MB in the beginning and 51.0 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 5133.09 ms. Allocated memory is still 71.3 MB. Free memory was 50.7 MB in the beginning and 40.5 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 9711.27 ms. Allocated memory is still 71.3 MB. Free memory was 40.2 MB in the beginning and 30.6 MB in the end (delta: 9.6 MB). Peak memory consumption was 10.3 MB. Max. memory is 16.1 GB. * Witness Printer took 80.32 ms. Allocated memory is still 71.3 MB. Free memory was 30.6 MB in the beginning and 28.5 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: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 12]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L14] float pi = 3.14159 ; VAL [pi=3.141590118408203] [L20] float x = __VERIFIER_nondet_float() ; [L21] float octant = pi/3 ; [L10] COND FALSE !(!cond) VAL [pi=3.141590118408203] [L23] float oddExp = x ; [L24] float evenExp = 1.0 ; [L25] float term = x ; [L26] unsigned int count = 2 ; [L27] int multFactor = 0 ; [L28] int temp ; VAL [pi=3.141590118408203] [L30] COND TRUE 1 [L32] term = term * (x/count) VAL [pi=3.141590118408203] [L33] EXPR (count>>1 % 2 == 0) ? 1 : -1 VAL [pi=3.141590118408203] [L33] multFactor = (count>>1 % 2 == 0) ? 1 : -1 [L35] evenExp = evenExp + multFactor*term [L37] count++ [L39] term = term * (x/count) [L41] oddExp = oddExp + multFactor*term [L43] count++ [L45] temp = __VERIFIER_nondet_int() [L46] COND TRUE temp == 0 VAL [pi=3.141590118408203] [L12] COND TRUE !(cond) VAL [pi=3.141590118408203] [L12] reach_error() VAL [pi=3.141590118408203] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 16 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 9.5s, OverallIterations: 3, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 5.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 27 SDtfs, 2 SDslu, 7 SDs, 0 SdLazy, 4 SolverSat, 1 SolverUnsat, 2 SolverUnknown, 0 SolverNotchecked, 5.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 34 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=16occurred in iteration=0, InterpolantAutomatonStates: 6, 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, 2 MinimizatonAttempts, 2 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 1.5s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 30 NumberOfCodeBlocks, 30 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 34 ConstructedInterpolants, 0 QuantifiedInterpolants, 48 SizeOfPredicates, 1 NumberOfNonLiveVariables, 85 ConjunctsInSsa, 3 ConjunctsInUnsatCore, 4 InterpolantComputations, 4 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-10-29 04:48:13,540 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b6f48e-543d-4429-b87d-3864919f019b/bin/utaipan-SDwSMHVbGG/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...