./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 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_d2c4ae57-a058-42c0-8206-c3c16f855883/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_d2c4ae57-a058-42c0-8206-c3c16f855883/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_d2c4ae57-a058-42c0-8206-c3c16f855883/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_d2c4ae57-a058-42c0-8206-c3c16f855883/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-floats-scientific-comp/loop2-1.c -s /tmp/vcloud-vcloud-master/worker/run_dir_d2c4ae57-a058-42c0-8206-c3c16f855883/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_d2c4ae57-a058-42c0-8206-c3c16f855883/bin/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 02e16371708027ec56fdf0402c3e1a5d4f23a0ff .......................................................................................................................................................................................................................................................................................................... Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_d2c4ae57-a058-42c0-8206-c3c16f855883/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_d2c4ae57-a058-42c0-8206-c3c16f855883/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_d2c4ae57-a058-42c0-8206-c3c16f855883/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_d2c4ae57-a058-42c0-8206-c3c16f855883/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-floats-scientific-comp/loop2-1.c -s /tmp/vcloud-vcloud-master/worker/run_dir_d2c4ae57-a058-42c0-8206-c3c16f855883/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_d2c4ae57-a058-42c0-8206-c3c16f855883/bin/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 02e16371708027ec56fdf0402c3e1a5d4f23a0ff ............................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.0-7b2dab5 [2020-12-09 18:17:37,948 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 18:17:37,950 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 18:17:37,985 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 18:17:37,986 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 18:17:37,987 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 18:17:37,989 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 18:17:37,991 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 18:17:37,993 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 18:17:37,994 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 18:17:37,995 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 18:17:37,996 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 18:17:37,997 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 18:17:37,998 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 18:17:37,999 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 18:17:38,000 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 18:17:38,001 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 18:17:38,002 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 18:17:38,004 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 18:17:38,006 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 18:17:38,008 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 18:17:38,009 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 18:17:38,011 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 18:17:38,012 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 18:17:38,015 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 18:17:38,015 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 18:17:38,015 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 18:17:38,016 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 18:17:38,017 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 18:17:38,018 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 18:17:38,018 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 18:17:38,019 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 18:17:38,020 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 18:17:38,021 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 18:17:38,022 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 18:17:38,022 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 18:17:38,023 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 18:17:38,023 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 18:17:38,023 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 18:17:38,024 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 18:17:38,024 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 18:17:38,025 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_d2c4ae57-a058-42c0-8206-c3c16f855883/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-12-09 18:17:38,047 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 18:17:38,047 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 18:17:38,048 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 18:17:38,048 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 18:17:38,048 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 18:17:38,048 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 18:17:38,048 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-12-09 18:17:38,049 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 18:17:38,049 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 18:17:38,049 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-12-09 18:17:38,049 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-12-09 18:17:38,049 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 18:17:38,049 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-12-09 18:17:38,050 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-12-09 18:17:38,050 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-12-09 18:17:38,050 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 18:17:38,051 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 18:17:38,051 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-09 18:17:38,051 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 18:17:38,051 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 18:17:38,051 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-09 18:17:38,051 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 18:17:38,052 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-09 18:17:38,052 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 18:17:38,052 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 18:17:38,052 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-09 18:17:38,052 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 18:17:38,052 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-09 18:17:38,053 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 18:17:38,053 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 18:17:38,053 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 18:17:38,053 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 18:17:38,053 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 18:17:38,054 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-09 18:17:38,054 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-12-09 18:17:38,054 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-09 18:17:38,054 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-09 18:17:38,054 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 18:17:38,054 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 18:17:38,055 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud-vcloud-master/worker/run_dir_d2c4ae57-a058-42c0-8206-c3c16f855883/bin/utaipan/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_d2c4ae57-a058-42c0-8206-c3c16f855883/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 02e16371708027ec56fdf0402c3e1a5d4f23a0ff [2020-12-09 18:17:38,222 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 18:17:38,244 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 18:17:38,246 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 18:17:38,247 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 18:17:38,247 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 18:17:38,248 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_d2c4ae57-a058-42c0-8206-c3c16f855883/bin/utaipan/../../sv-benchmarks/c/loop-floats-scientific-comp/loop2-1.c [2020-12-09 18:17:38,287 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_d2c4ae57-a058-42c0-8206-c3c16f855883/bin/utaipan/data/6cf5279ea/c3a31e23e4b14b9e85c66f58cc87d10f/FLAG64def5398 [2020-12-09 18:17:38,657 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 18:17:38,657 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_d2c4ae57-a058-42c0-8206-c3c16f855883/sv-benchmarks/c/loop-floats-scientific-comp/loop2-1.c [2020-12-09 18:17:38,662 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_d2c4ae57-a058-42c0-8206-c3c16f855883/bin/utaipan/data/6cf5279ea/c3a31e23e4b14b9e85c66f58cc87d10f/FLAG64def5398 [2020-12-09 18:17:38,671 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_d2c4ae57-a058-42c0-8206-c3c16f855883/bin/utaipan/data/6cf5279ea/c3a31e23e4b14b9e85c66f58cc87d10f [2020-12-09 18:17:38,673 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 18:17:38,674 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 18:17:38,675 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 18:17:38,676 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 18:17:38,678 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 18:17:38,678 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 06:17:38" (1/1) ... [2020-12-09 18:17:38,680 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@53a5a374 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:17:38, skipping insertion in model container [2020-12-09 18:17:38,680 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 06:17:38" (1/1) ... [2020-12-09 18:17:38,685 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 18:17:38,698 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 18:17:38,809 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_d2c4ae57-a058-42c0-8206-c3c16f855883/sv-benchmarks/c/loop-floats-scientific-comp/loop2-1.c[474,487] [2020-12-09 18:17:38,827 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 18:17:38,836 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 18:17:38,848 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_d2c4ae57-a058-42c0-8206-c3c16f855883/sv-benchmarks/c/loop-floats-scientific-comp/loop2-1.c[474,487] [2020-12-09 18:17:38,854 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 18:17:38,867 INFO L208 MainTranslator]: Completed translation [2020-12-09 18:17:38,868 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:17:38 WrapperNode [2020-12-09 18:17:38,868 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 18:17:38,869 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 18:17:38,869 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 18:17:38,869 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 18:17:38,876 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:17:38" (1/1) ... [2020-12-09 18:17:38,881 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:17:38" (1/1) ... [2020-12-09 18:17:38,895 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 18:17:38,896 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 18:17:38,896 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 18:17:38,896 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 18:17:38,902 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:17:38" (1/1) ... [2020-12-09 18:17:38,902 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:17:38" (1/1) ... [2020-12-09 18:17:38,904 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:17:38" (1/1) ... [2020-12-09 18:17:38,904 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:17:38" (1/1) ... [2020-12-09 18:17:38,909 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:17:38" (1/1) ... [2020-12-09 18:17:38,912 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:17:38" (1/1) ... [2020-12-09 18:17:38,914 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:17:38" (1/1) ... [2020-12-09 18:17:38,916 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 18:17:38,916 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 18:17:38,917 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 18:17:38,917 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 18:17:38,917 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:17:38" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d2c4ae57-a058-42c0-8206-c3c16f855883/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 18:17:38,969 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-09 18:17:38,969 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 18:17:38,970 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 18:17:38,970 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 18:17:39,188 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 18:17:39,188 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2020-12-09 18:17:39,190 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 06:17:39 BoogieIcfgContainer [2020-12-09 18:17:39,191 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 18:17:39,192 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 18:17:39,193 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 18:17:39,196 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 18:17:39,196 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 06:17:38" (1/3) ... [2020-12-09 18:17:39,197 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fcfd8b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 06:17:39, skipping insertion in model container [2020-12-09 18:17:39,197 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:17:38" (2/3) ... [2020-12-09 18:17:39,197 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fcfd8b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 06:17:39, skipping insertion in model container [2020-12-09 18:17:39,197 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 06:17:39" (3/3) ... [2020-12-09 18:17:39,199 INFO L111 eAbstractionObserver]: Analyzing ICFG loop2-1.c [2020-12-09 18:17:39,212 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 18:17:39,215 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-09 18:17:39,225 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-09 18:17:39,246 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 18:17:39,247 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-09 18:17:39,247 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 18:17:39,247 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 18:17:39,247 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 18:17:39,247 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 18:17:39,247 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 18:17:39,247 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 18:17:39,256 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states. [2020-12-09 18:17:39,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-12-09 18:17:39,260 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 18:17:39,260 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-12-09 18:17:39,261 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 18:17:39,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 18:17:39,265 INFO L82 PathProgramCache]: Analyzing trace with hash 79307711, now seen corresponding path program 1 times [2020-12-09 18:17:39,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 18:17:39,272 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077933604] [2020-12-09 18:17:39,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 18:17:39,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 18:17:39,392 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 18:17:39,393 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077933604] [2020-12-09 18:17:39,393 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 18:17:39,394 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 18:17:39,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228443669] [2020-12-09 18:17:39,397 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-09 18:17:39,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 18:17:39,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-09 18:17:39,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-09 18:17:39,408 INFO L87 Difference]: Start difference. First operand 9 states. Second operand 2 states. [2020-12-09 18:17:39,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 18:17:39,418 INFO L93 Difference]: Finished difference Result 15 states and 17 transitions. [2020-12-09 18:17:39,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-09 18:17:39,419 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 5 [2020-12-09 18:17:39,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 18:17:39,425 INFO L225 Difference]: With dead ends: 15 [2020-12-09 18:17:39,425 INFO L226 Difference]: Without dead ends: 7 [2020-12-09 18:17:39,427 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-09 18:17:39,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2020-12-09 18:17:39,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2020-12-09 18:17:39,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2020-12-09 18:17:39,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2020-12-09 18:17:39,448 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 5 [2020-12-09 18:17:39,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 18:17:39,448 INFO L481 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2020-12-09 18:17:39,448 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-09 18:17:39,448 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2020-12-09 18:17:39,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-09 18:17:39,449 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 18:17:39,449 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-09 18:17:39,449 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-09 18:17:39,449 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 18:17:39,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 18:17:39,450 INFO L82 PathProgramCache]: Analyzing trace with hash -1837533428, now seen corresponding path program 1 times [2020-12-09 18:17:39,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 18:17:39,451 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388302050] [2020-12-09 18:17:39,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 18:17:39,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 18:17:39,481 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 18:17:39,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 18:17:39,498 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 18:17:39,514 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2020-12-09 18:17:39,514 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-09 18:17:39,515 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-09 18:17:39,533 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 06:17:39 BoogieIcfgContainer [2020-12-09 18:17:39,533 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 18:17:39,533 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 18:17:39,534 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 18:17:39,534 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 18:17:39,534 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 06:17:39" (3/4) ... [2020-12-09 18:17:39,537 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-12-09 18:17:39,537 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 18:17:39,538 INFO L168 Benchmark]: Toolchain (without parser) took 863.62 ms. Allocated memory is still 130.0 MB. Free memory was 93.9 MB in the beginning and 60.6 MB in the end (delta: 33.3 MB). Peak memory consumption was 31.1 MB. Max. memory is 16.1 GB. [2020-12-09 18:17:39,539 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 130.0 MB. Free memory is still 110.2 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 18:17:39,539 INFO L168 Benchmark]: CACSL2BoogieTranslator took 192.99 ms. Allocated memory is still 130.0 MB. Free memory was 93.7 MB in the beginning and 104.8 MB in the end (delta: -11.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-12-09 18:17:39,540 INFO L168 Benchmark]: Boogie Procedure Inliner took 26.04 ms. Allocated memory is still 130.0 MB. Free memory was 104.8 MB in the beginning and 103.5 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 18:17:39,541 INFO L168 Benchmark]: Boogie Preprocessor took 19.99 ms. Allocated memory is still 130.0 MB. Free memory was 103.5 MB in the beginning and 102.2 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 18:17:39,541 INFO L168 Benchmark]: RCFGBuilder took 274.27 ms. Allocated memory is still 130.0 MB. Free memory was 102.2 MB in the beginning and 82.1 MB in the end (delta: 20.1 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. [2020-12-09 18:17:39,542 INFO L168 Benchmark]: TraceAbstraction took 340.61 ms. Allocated memory is still 130.0 MB. Free memory was 81.8 MB in the beginning and 60.8 MB in the end (delta: 21.0 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. [2020-12-09 18:17:39,542 INFO L168 Benchmark]: Witness Printer took 3.31 ms. Allocated memory is still 130.0 MB. Free memory was 60.8 MB in the beginning and 60.6 MB in the end (delta: 133.6 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 18:17:39,545 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 130.0 MB. Free memory is still 110.2 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 192.99 ms. Allocated memory is still 130.0 MB. Free memory was 93.7 MB in the beginning and 104.8 MB in the end (delta: -11.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 26.04 ms. Allocated memory is still 130.0 MB. Free memory was 104.8 MB in the beginning and 103.5 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 19.99 ms. Allocated memory is still 130.0 MB. Free memory was 103.5 MB in the beginning and 102.2 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 274.27 ms. Allocated memory is still 130.0 MB. Free memory was 102.2 MB in the beginning and 82.1 MB in the end (delta: 20.1 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. * TraceAbstraction took 340.61 ms. Allocated memory is still 130.0 MB. Free memory was 81.8 MB in the beginning and 60.8 MB in the end (delta: 21.0 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. * Witness Printer took 3.31 ms. Allocated memory is still 130.0 MB. Free memory was 60.8 MB in the beginning and 60.6 MB in the end (delta: 133.6 kB). There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - 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. VerificationResult: UNSAFE, OverallTime: 0.2s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 9 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=9occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 11 NumberOfCodeBlocks, 11 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 4 ConstructedInterpolants, 0 QuantifiedInterpolants, 16 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.0-7b2dab5 [2020-12-09 18:17:41,075 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 18:17:41,077 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 18:17:41,104 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 18:17:41,105 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 18:17:41,106 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 18:17:41,108 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 18:17:41,110 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 18:17:41,113 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 18:17:41,114 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 18:17:41,115 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 18:17:41,116 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 18:17:41,116 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 18:17:41,118 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 18:17:41,119 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 18:17:41,120 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 18:17:41,121 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 18:17:41,122 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 18:17:41,124 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 18:17:41,127 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 18:17:41,129 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 18:17:41,130 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 18:17:41,131 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 18:17:41,132 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 18:17:41,135 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 18:17:41,136 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 18:17:41,136 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 18:17:41,137 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 18:17:41,138 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 18:17:41,139 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 18:17:41,139 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 18:17:41,140 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 18:17:41,141 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 18:17:41,142 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 18:17:41,143 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 18:17:41,143 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 18:17:41,144 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 18:17:41,144 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 18:17:41,144 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 18:17:41,145 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 18:17:41,146 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 18:17:41,146 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_d2c4ae57-a058-42c0-8206-c3c16f855883/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2020-12-09 18:17:41,169 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 18:17:41,170 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 18:17:41,170 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 18:17:41,170 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 18:17:41,171 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 18:17:41,171 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 18:17:41,171 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 18:17:41,171 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 18:17:41,171 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 18:17:41,172 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 18:17:41,172 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 18:17:41,172 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 18:17:41,172 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 18:17:41,172 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-09 18:17:41,172 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 18:17:41,172 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-09 18:17:41,172 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 18:17:41,173 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2020-12-09 18:17:41,173 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2020-12-09 18:17:41,173 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 18:17:41,173 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-09 18:17:41,173 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 18:17:41,173 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-09 18:17:41,173 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 18:17:41,173 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-09 18:17:41,174 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 18:17:41,174 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 18:17:41,174 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 18:17:41,174 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 18:17:41,174 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-09 18:17:41,174 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2020-12-09 18:17:41,174 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2020-12-09 18:17:41,175 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-09 18:17:41,175 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 18:17:41,175 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 18:17:41,175 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud-vcloud-master/worker/run_dir_d2c4ae57-a058-42c0-8206-c3c16f855883/bin/utaipan/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_d2c4ae57-a058-42c0-8206-c3c16f855883/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 02e16371708027ec56fdf0402c3e1a5d4f23a0ff [2020-12-09 18:17:41,392 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 18:17:41,408 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 18:17:41,411 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 18:17:41,412 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 18:17:41,413 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 18:17:41,413 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_d2c4ae57-a058-42c0-8206-c3c16f855883/bin/utaipan/../../sv-benchmarks/c/loop-floats-scientific-comp/loop2-1.c [2020-12-09 18:17:41,453 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_d2c4ae57-a058-42c0-8206-c3c16f855883/bin/utaipan/data/1956a4619/8c2a7328477d4097afcfd4011451cad2/FLAGb3bb5934c [2020-12-09 18:17:41,829 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 18:17:41,830 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_d2c4ae57-a058-42c0-8206-c3c16f855883/sv-benchmarks/c/loop-floats-scientific-comp/loop2-1.c [2020-12-09 18:17:41,835 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_d2c4ae57-a058-42c0-8206-c3c16f855883/bin/utaipan/data/1956a4619/8c2a7328477d4097afcfd4011451cad2/FLAGb3bb5934c [2020-12-09 18:17:41,847 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_d2c4ae57-a058-42c0-8206-c3c16f855883/bin/utaipan/data/1956a4619/8c2a7328477d4097afcfd4011451cad2 [2020-12-09 18:17:41,849 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 18:17:41,850 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 18:17:41,852 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 18:17:41,852 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 18:17:41,855 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 18:17:41,856 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 06:17:41" (1/1) ... [2020-12-09 18:17:41,858 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5c8b208b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:17:41, skipping insertion in model container [2020-12-09 18:17:41,858 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 06:17:41" (1/1) ... [2020-12-09 18:17:41,864 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 18:17:41,879 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 18:17:41,985 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_d2c4ae57-a058-42c0-8206-c3c16f855883/sv-benchmarks/c/loop-floats-scientific-comp/loop2-1.c[474,487] [2020-12-09 18:17:42,000 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 18:17:42,013 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 18:17:42,025 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_d2c4ae57-a058-42c0-8206-c3c16f855883/sv-benchmarks/c/loop-floats-scientific-comp/loop2-1.c[474,487] [2020-12-09 18:17:42,033 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 18:17:42,049 INFO L208 MainTranslator]: Completed translation [2020-12-09 18:17:42,050 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:17:42 WrapperNode [2020-12-09 18:17:42,050 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 18:17:42,051 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 18:17:42,051 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 18:17:42,051 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 18:17:42,059 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:17:42" (1/1) ... [2020-12-09 18:17:42,074 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:17:42" (1/1) ... [2020-12-09 18:17:42,106 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 18:17:42,107 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 18:17:42,107 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 18:17:42,107 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 18:17:42,115 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:17:42" (1/1) ... [2020-12-09 18:17:42,115 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:17:42" (1/1) ... [2020-12-09 18:17:42,118 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:17:42" (1/1) ... [2020-12-09 18:17:42,119 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:17:42" (1/1) ... [2020-12-09 18:17:42,126 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:17:42" (1/1) ... [2020-12-09 18:17:42,129 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:17:42" (1/1) ... [2020-12-09 18:17:42,132 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:17:42" (1/1) ... [2020-12-09 18:17:42,135 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 18:17:42,137 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 18:17:42,137 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 18:17:42,137 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 18:17:42,138 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:17:42" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d2c4ae57-a058-42c0-8206-c3c16f855883/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 18:17:42,193 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2020-12-09 18:17:42,193 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 18:17:42,193 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 18:17:42,194 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 18:17:47,131 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 18:17:47,131 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2020-12-09 18:17:47,132 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 06:17:47 BoogieIcfgContainer [2020-12-09 18:17:47,132 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 18:17:47,134 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 18:17:47,134 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 18:17:47,136 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 18:17:47,136 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 06:17:41" (1/3) ... [2020-12-09 18:17:47,137 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5fd87c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 06:17:47, skipping insertion in model container [2020-12-09 18:17:47,137 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:17:42" (2/3) ... [2020-12-09 18:17:47,137 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5fd87c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 06:17:47, skipping insertion in model container [2020-12-09 18:17:47,137 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 06:17:47" (3/3) ... [2020-12-09 18:17:47,138 INFO L111 eAbstractionObserver]: Analyzing ICFG loop2-1.c [2020-12-09 18:17:47,148 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 18:17:47,151 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-09 18:17:47,158 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-09 18:17:47,179 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 18:17:47,179 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-09 18:17:47,179 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 18:17:47,179 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 18:17:47,180 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 18:17:47,180 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 18:17:47,180 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 18:17:47,180 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 18:17:47,188 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states. [2020-12-09 18:17:47,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-09 18:17:47,191 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 18:17:47,192 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 18:17:47,192 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 18:17:47,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 18:17:47,196 INFO L82 PathProgramCache]: Analyzing trace with hash 119997515, now seen corresponding path program 1 times [2020-12-09 18:17:47,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 18:17:47,205 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1915204536] [2020-12-09 18:17:47,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d2c4ae57-a058-42c0-8206-c3c16f855883/bin/utaipan/mathsat Starting monitored process 2 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with mathsat -unsat_core_generation=3 [2020-12-09 18:17:47,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 18:17:47,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 1 conjunts are in the unsatisfiable core [2020-12-09 18:17:47,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 18:17:47,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 18:17:47,347 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 18:17:47,347 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1915204536] [2020-12-09 18:17:47,348 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 18:17:47,348 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 18:17:47,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399637206] [2020-12-09 18:17:47,351 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-09 18:17:47,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 18:17:47,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-09 18:17:47,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-09 18:17:47,362 INFO L87 Difference]: Start difference. First operand 16 states. Second operand 2 states. [2020-12-09 18:17:47,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 18:17:47,373 INFO L93 Difference]: Finished difference Result 29 states and 38 transitions. [2020-12-09 18:17:47,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-09 18:17:47,374 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 8 [2020-12-09 18:17:47,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 18:17:47,379 INFO L225 Difference]: With dead ends: 29 [2020-12-09 18:17:47,379 INFO L226 Difference]: Without dead ends: 12 [2020-12-09 18:17:47,381 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-09 18:17:47,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2020-12-09 18:17:47,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2020-12-09 18:17:47,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-12-09 18:17:47,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2020-12-09 18:17:47,402 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 8 [2020-12-09 18:17:47,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 18:17:47,402 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2020-12-09 18:17:47,402 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-09 18:17:47,403 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2020-12-09 18:17:47,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-09 18:17:47,403 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 18:17:47,403 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 18:17:47,603 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-12-09 18:17:47,604 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 18:17:47,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 18:17:47,605 INFO L82 PathProgramCache]: Analyzing trace with hash -2105434535, now seen corresponding path program 1 times [2020-12-09 18:17:47,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 18:17:47,605 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [786485684] [2020-12-09 18:17:47,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d2c4ae57-a058-42c0-8206-c3c16f855883/bin/utaipan/mathsat Starting monitored process 3 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with mathsat -unsat_core_generation=3 [2020-12-09 18:17:48,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 18:17:48,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-09 18:17:48,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 18:17:48,282 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 18:17:48,282 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 18:17:48,282 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [786485684] [2020-12-09 18:17:48,282 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 18:17:48,282 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 18:17:48,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174274637] [2020-12-09 18:17:48,283 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 18:17:48,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 18:17:48,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 18:17:48,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 18:17:48,287 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand 3 states. [2020-12-09 18:17:53,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 18:17:53,316 INFO L93 Difference]: Finished difference Result 23 states and 26 transitions. [2020-12-09 18:17:53,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 18:17:53,317 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2020-12-09 18:17:53,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 18:17:53,317 INFO L225 Difference]: With dead ends: 23 [2020-12-09 18:17:53,317 INFO L226 Difference]: Without dead ends: 15 [2020-12-09 18:17:53,318 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 18:17:53,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-12-09 18:17:53,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2020-12-09 18:17:53,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-12-09 18:17:53,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2020-12-09 18:17:53,321 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 11 [2020-12-09 18:17:53,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 18:17:53,322 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2020-12-09 18:17:53,322 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 18:17:53,322 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2020-12-09 18:17:53,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-09 18:17:53,322 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 18:17:53,322 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 18:17:53,523 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-12-09 18:17:53,524 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 18:17:53,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 18:17:53,526 INFO L82 PathProgramCache]: Analyzing trace with hash -2048176233, now seen corresponding path program 1 times [2020-12-09 18:17:53,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 18:17:53,529 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1407217075] [2020-12-09 18:17:53,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d2c4ae57-a058-42c0-8206-c3c16f855883/bin/utaipan/mathsat Starting monitored process 4 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with mathsat -unsat_core_generation=3 [2020-12-09 18:17:54,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 18:17:54,305 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 18:17:55,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 18:17:55,000 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 18:17:55,061 INFO L173 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2020-12-09 18:17:55,061 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-09 18:17:55,262 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3 [2020-12-09 18:17:55,293 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 06:17:55 BoogieIcfgContainer [2020-12-09 18:17:55,293 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 18:17:55,293 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 18:17:55,294 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 18:17:55,294 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 18:17:55,294 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 06:17:47" (3/4) ... [2020-12-09 18:17:55,295 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-12-09 18:17:55,327 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_d2c4ae57-a058-42c0-8206-c3c16f855883/bin/utaipan/witness.graphml [2020-12-09 18:17:55,327 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 18:17:55,329 INFO L168 Benchmark]: Toolchain (without parser) took 13477.73 ms. Allocated memory was 62.9 MB in the beginning and 79.7 MB in the end (delta: 16.8 MB). Free memory was 46.4 MB in the beginning and 45.7 MB in the end (delta: 683.2 kB). Peak memory consumption was 15.7 MB. Max. memory is 16.1 GB. [2020-12-09 18:17:55,329 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 62.9 MB. Free memory is still 45.5 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 18:17:55,329 INFO L168 Benchmark]: CACSL2BoogieTranslator took 198.47 ms. Allocated memory is still 62.9 MB. Free memory was 46.2 MB in the beginning and 35.5 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-12-09 18:17:55,330 INFO L168 Benchmark]: Boogie Procedure Inliner took 55.09 ms. Allocated memory is still 62.9 MB. Free memory was 35.5 MB in the beginning and 46.8 MB in the end (delta: -11.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 18:17:55,330 INFO L168 Benchmark]: Boogie Preprocessor took 29.13 ms. Allocated memory is still 62.9 MB. Free memory was 46.8 MB in the beginning and 45.5 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 18:17:55,331 INFO L168 Benchmark]: RCFGBuilder took 4995.80 ms. Allocated memory is still 62.9 MB. Free memory was 45.5 MB in the beginning and 31.8 MB in the end (delta: 13.7 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2020-12-09 18:17:55,331 INFO L168 Benchmark]: TraceAbstraction took 8159.36 ms. Allocated memory was 62.9 MB in the beginning and 79.7 MB in the end (delta: 16.8 MB). Free memory was 31.6 MB in the beginning and 48.3 MB in the end (delta: -16.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 18:17:55,331 INFO L168 Benchmark]: Witness Printer took 33.97 ms. Allocated memory is still 79.7 MB. Free memory was 48.3 MB in the beginning and 45.7 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 18:17:55,334 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11 ms. Allocated memory is still 62.9 MB. Free memory is still 45.5 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 198.47 ms. Allocated memory is still 62.9 MB. Free memory was 46.2 MB in the beginning and 35.5 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 55.09 ms. Allocated memory is still 62.9 MB. Free memory was 35.5 MB in the beginning and 46.8 MB in the end (delta: -11.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 29.13 ms. Allocated memory is still 62.9 MB. Free memory was 46.8 MB in the beginning and 45.5 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 4995.80 ms. Allocated memory is still 62.9 MB. Free memory was 45.5 MB in the beginning and 31.8 MB in the end (delta: 13.7 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 8159.36 ms. Allocated memory was 62.9 MB in the beginning and 79.7 MB in the end (delta: 16.8 MB). Free memory was 31.6 MB in the beginning and 48.3 MB in the end (delta: -16.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Witness Printer took 33.97 ms. Allocated memory is still 79.7 MB. Free memory was 48.3 MB in the beginning and 45.7 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 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. VerificationResult: UNSAFE, OverallTime: 8.0s, OverallIterations: 3, TraceHistogramMax: 1, AutomataDifference: 5.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 27 SDtfs, 1 SDslu, 7 SDs, 0 SdLazy, 4 SolverSat, 0 SolverUnsat, 2 SolverUnknown, 0 SolverNotchecked, 4.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 17 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=16occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 2 MinimizatonAttempts, 1 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 1.3s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 30 NumberOfCodeBlocks, 30 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 17 ConstructedInterpolants, 0 QuantifiedInterpolants, 189 SizeOfPredicates, 1 NumberOfNonLiveVariables, 85 ConjunctsInSsa, 3 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...