./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 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7750068f-884e-42b1-806b-f0f9634fb7fc/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7750068f-884e-42b1-806b-f0f9634fb7fc/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7750068f-884e-42b1-806b-f0f9634fb7fc/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7750068f-884e-42b1-806b-f0f9634fb7fc/bin/utaipan-UUZaoUuFF8/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_7750068f-884e-42b1-806b-f0f9634fb7fc/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7750068f-884e-42b1-806b-f0f9634fb7fc/bin/utaipan-UUZaoUuFF8 --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 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:47:41,740 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:47:41,744 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:47:41,816 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:47:41,817 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:47:41,823 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:47:41,826 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:47:41,831 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:47:41,834 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:47:41,846 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:47:41,847 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:47:41,850 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:47:41,850 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:47:41,854 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:47:41,857 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:47:41,862 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:47:41,865 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:47:41,866 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:47:41,869 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:47:41,880 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:47:41,882 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:47:41,884 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:47:41,888 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:47:41,889 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:47:41,901 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:47:41,901 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:47:41,902 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:47:41,904 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:47:41,905 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:47:41,907 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:47:41,908 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:47:41,909 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:47:41,912 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:47:41,914 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:47:41,915 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:47:41,916 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:47:41,917 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:47:41,917 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:47:41,918 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:47:41,919 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:47:41,920 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:47:41,921 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7750068f-884e-42b1-806b-f0f9634fb7fc/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 01:47:41,974 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:47:41,974 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:47:41,976 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:47:41,977 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:47:41,977 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:47:41,977 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:47:41,978 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 01:47:41,978 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:47:41,978 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:47:41,979 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 01:47:41,980 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 01:47:41,980 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:47:41,981 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 01:47:41,981 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 01:47:41,981 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 01:47:41,983 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:47:41,983 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:47:41,983 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 01:47:41,984 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:47:41,984 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:47:41,984 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:47:41,984 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:47:41,985 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:47:41,985 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:47:41,985 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:47:41,986 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:47:41,986 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:47:41,986 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:47:41,987 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:47:41,987 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:47:41,987 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:47:41,987 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:47:41,988 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:47:41,988 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:47:41,989 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 01:47:41,989 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 01:47:41,989 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:47:41,989 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:47:41,990 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:47:41,990 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_7750068f-884e-42b1-806b-f0f9634fb7fc/bin/utaipan-UUZaoUuFF8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7750068f-884e-42b1-806b-f0f9634fb7fc/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1b47128f3a13b8a14fa5679442cf3dce52b78403c71ab556b465499f91ebd451 [2021-11-07 01:47:42,385 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:47:42,413 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:47:42,417 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:47:42,419 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:47:42,420 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:47:42,421 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7750068f-884e-42b1-806b-f0f9634fb7fc/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/loop-floats-scientific-comp/loop2-1.c [2021-11-07 01:47:42,512 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7750068f-884e-42b1-806b-f0f9634fb7fc/bin/utaipan-UUZaoUuFF8/data/43226e776/598018e31eac4116b6324714a7779879/FLAG310922596 [2021-11-07 01:47:43,123 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:47:43,124 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7750068f-884e-42b1-806b-f0f9634fb7fc/sv-benchmarks/c/loop-floats-scientific-comp/loop2-1.c [2021-11-07 01:47:43,139 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7750068f-884e-42b1-806b-f0f9634fb7fc/bin/utaipan-UUZaoUuFF8/data/43226e776/598018e31eac4116b6324714a7779879/FLAG310922596 [2021-11-07 01:47:43,462 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7750068f-884e-42b1-806b-f0f9634fb7fc/bin/utaipan-UUZaoUuFF8/data/43226e776/598018e31eac4116b6324714a7779879 [2021-11-07 01:47:43,466 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:47:43,468 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:47:43,470 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:47:43,470 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:47:43,474 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:47:43,475 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:47:43" (1/1) ... [2021-11-07 01:47:43,478 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6d8bfb11 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:47:43, skipping insertion in model container [2021-11-07 01:47:43,478 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:47:43" (1/1) ... [2021-11-07 01:47:43,487 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:47:43,506 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:47:43,697 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_7750068f-884e-42b1-806b-f0f9634fb7fc/sv-benchmarks/c/loop-floats-scientific-comp/loop2-1.c[474,487] [2021-11-07 01:47:43,742 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:47:43,753 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 01:47:43,768 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_7750068f-884e-42b1-806b-f0f9634fb7fc/sv-benchmarks/c/loop-floats-scientific-comp/loop2-1.c[474,487] [2021-11-07 01:47:43,776 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:47:43,792 INFO L208 MainTranslator]: Completed translation [2021-11-07 01:47:43,793 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:47:43 WrapperNode [2021-11-07 01:47:43,793 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:47:43,795 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 01:47:43,795 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 01:47:43,795 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 01:47:43,804 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:47:43" (1/1) ... [2021-11-07 01:47:43,813 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:47:43" (1/1) ... [2021-11-07 01:47:43,836 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 01:47:43,837 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 01:47:43,837 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 01:47:43,837 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 01:47:43,846 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:47:43" (1/1) ... [2021-11-07 01:47:43,847 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:47:43" (1/1) ... [2021-11-07 01:47:43,848 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:47:43" (1/1) ... [2021-11-07 01:47:43,849 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:47:43" (1/1) ... [2021-11-07 01:47:43,854 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:47:43" (1/1) ... [2021-11-07 01:47:43,858 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:47:43" (1/1) ... [2021-11-07 01:47:43,859 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:47:43" (1/1) ... [2021-11-07 01:47:43,861 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 01:47:43,862 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 01:47:43,863 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 01:47:43,863 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 01:47:43,864 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:47:43" (1/1) ... [2021-11-07 01:47:43,872 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:47:43,883 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7750068f-884e-42b1-806b-f0f9634fb7fc/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:47:43,902 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7750068f-884e-42b1-806b-f0f9634fb7fc/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 01:47:43,916 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7750068f-884e-42b1-806b-f0f9634fb7fc/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 01:47:43,950 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-07 01:47:43,950 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 01:47:43,950 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 01:47:43,950 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 01:47:44,272 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 01:47:44,273 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2021-11-07 01:47:44,275 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:47:44 BoogieIcfgContainer [2021-11-07 01:47:44,275 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 01:47:44,277 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 01:47:44,278 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 01:47:44,292 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 01:47:44,292 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:47:43" (1/3) ... [2021-11-07 01:47:44,293 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@551f1a48 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:47:44, skipping insertion in model container [2021-11-07 01:47:44,293 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:47:43" (2/3) ... [2021-11-07 01:47:44,293 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@551f1a48 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:47:44, skipping insertion in model container [2021-11-07 01:47:44,294 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:47:44" (3/3) ... [2021-11-07 01:47:44,295 INFO L111 eAbstractionObserver]: Analyzing ICFG loop2-1.c [2021-11-07 01:47:44,300 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 01:47:44,301 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-07 01:47:44,392 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 01:47:44,403 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 [2021-11-07 01:47:44,404 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-07 01:47:44,422 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) [2021-11-07 01:47:44,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-07 01:47:44,442 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:47:44,443 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-07 01:47:44,444 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:47:44,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:47:44,453 INFO L85 PathProgramCache]: Analyzing trace with hash 80052486, now seen corresponding path program 1 times [2021-11-07 01:47:44,464 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:47:44,465 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124020871] [2021-11-07 01:47:44,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:47:44,466 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:47:44,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:47:44,689 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:47:44,690 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:47:44,690 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124020871] [2021-11-07 01:47:44,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124020871] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:47:44,692 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:47:44,692 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-07 01:47:44,694 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824787666] [2021-11-07 01:47:44,699 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 01:47:44,700 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:47:44,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 01:47:44,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 01:47:44,723 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) [2021-11-07 01:47:44,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:47:44,738 INFO L93 Difference]: Finished difference Result 15 states and 17 transitions. [2021-11-07 01:47:44,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 01:47:44,740 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 [2021-11-07 01:47:44,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:47:44,750 INFO L225 Difference]: With dead ends: 15 [2021-11-07 01:47:44,750 INFO L226 Difference]: Without dead ends: 7 [2021-11-07 01:47:44,755 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 [2021-11-07 01:47:44,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2021-11-07 01:47:44,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2021-11-07 01:47:44,787 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) [2021-11-07 01:47:44,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2021-11-07 01:47:44,791 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 5 [2021-11-07 01:47:44,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:47:44,792 INFO L470 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2021-11-07 01:47:44,792 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) [2021-11-07 01:47:44,793 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2021-11-07 01:47:44,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-07 01:47:44,794 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:47:44,794 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-07 01:47:44,795 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-07 01:47:44,795 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:47:44,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:47:44,799 INFO L85 PathProgramCache]: Analyzing trace with hash -1807980756, now seen corresponding path program 1 times [2021-11-07 01:47:44,800 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:47:44,800 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417184695] [2021-11-07 01:47:44,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:47:44,801 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:47:44,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-07 01:47:44,881 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-07 01:47:44,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-07 01:47:44,988 INFO L133 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-11-07 01:47:44,988 INFO L627 BasicCegarLoop]: Counterexample is feasible [2021-11-07 01:47:44,992 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-11-07 01:47:44,996 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-07 01:47:45,000 INFO L731 BasicCegarLoop]: Path program histogram: [1, 1] [2021-11-07 01:47:45,004 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-07 01:47:45,042 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 01:47:45 BoogieIcfgContainer [2021-11-07 01:47:45,042 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-07 01:47:45,043 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-07 01:47:45,044 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-07 01:47:45,044 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-07 01:47:45,045 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:47:44" (3/4) ... [2021-11-07 01:47:45,048 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-11-07 01:47:45,049 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-07 01:47:45,052 INFO L168 Benchmark]: Toolchain (without parser) took 1583.24 ms. Allocated memory was 81.8 MB in the beginning and 121.6 MB in the end (delta: 39.8 MB). Free memory was 48.0 MB in the beginning and 58.9 MB in the end (delta: -10.9 MB). Peak memory consumption was 26.7 MB. Max. memory is 16.1 GB. [2021-11-07 01:47:45,053 INFO L168 Benchmark]: CDTParser took 0.31 ms. Allocated memory is still 81.8 MB. Free memory was 54.1 MB in the beginning and 54.1 MB in the end (delta: 24.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 01:47:45,057 INFO L168 Benchmark]: CACSL2BoogieTranslator took 324.12 ms. Allocated memory was 81.8 MB in the beginning and 121.6 MB in the end (delta: 39.8 MB). Free memory was 47.9 MB in the beginning and 98.2 MB in the end (delta: -50.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-11-07 01:47:45,059 INFO L168 Benchmark]: Boogie Procedure Inliner took 41.37 ms. Allocated memory is still 121.6 MB. Free memory was 98.2 MB in the beginning and 96.7 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-11-07 01:47:45,064 INFO L168 Benchmark]: Boogie Preprocessor took 24.86 ms. Allocated memory is still 121.6 MB. Free memory was 96.7 MB in the beginning and 95.2 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-11-07 01:47:45,065 INFO L168 Benchmark]: RCFGBuilder took 413.22 ms. Allocated memory is still 121.6 MB. Free memory was 95.2 MB in the beginning and 82.7 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-11-07 01:47:45,066 INFO L168 Benchmark]: TraceAbstraction took 764.63 ms. Allocated memory is still 121.6 MB. Free memory was 82.1 MB in the beginning and 59.6 MB in the end (delta: 22.5 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.1 GB. [2021-11-07 01:47:45,067 INFO L168 Benchmark]: Witness Printer took 6.52 ms. Allocated memory is still 121.6 MB. Free memory was 59.6 MB in the beginning and 58.9 MB in the end (delta: 619.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 01:47:45,077 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31 ms. Allocated memory is still 81.8 MB. Free memory was 54.1 MB in the beginning and 54.1 MB in the end (delta: 24.1 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 324.12 ms. Allocated memory was 81.8 MB in the beginning and 121.6 MB in the end (delta: 39.8 MB). Free memory was 47.9 MB in the beginning and 98.2 MB in the end (delta: -50.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 41.37 ms. Allocated memory is still 121.6 MB. Free memory was 98.2 MB in the beginning and 96.7 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 24.86 ms. Allocated memory is still 121.6 MB. Free memory was 96.7 MB in the beginning and 95.2 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 413.22 ms. Allocated memory is still 121.6 MB. Free memory was 95.2 MB in the beginning and 82.7 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 764.63 ms. Allocated memory is still 121.6 MB. Free memory was 82.1 MB in the beginning and 59.6 MB in the end (delta: 22.5 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.1 GB. * Witness Printer took 6.52 ms. Allocated memory is still 121.6 MB. Free memory was 59.6 MB in the beginning and 58.9 MB in the end (delta: 619.0 kB). 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: 0.6s, 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, 0.1s 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 [2021-11-07 01:47:45,148 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7750068f-884e-42b1-806b-f0f9634fb7fc/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7750068f-884e-42b1-806b-f0f9634fb7fc/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7750068f-884e-42b1-806b-f0f9634fb7fc/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7750068f-884e-42b1-806b-f0f9634fb7fc/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7750068f-884e-42b1-806b-f0f9634fb7fc/bin/utaipan-UUZaoUuFF8/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_7750068f-884e-42b1-806b-f0f9634fb7fc/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7750068f-884e-42b1-806b-f0f9634fb7fc/bin/utaipan-UUZaoUuFF8 --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 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:47:47,844 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:47:47,846 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:47:47,878 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:47:47,879 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:47:47,883 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:47:47,887 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:47:47,891 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:47:47,895 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:47:47,902 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:47:47,904 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:47:47,905 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:47:47,906 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:47:47,909 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:47:47,911 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:47:47,914 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:47:47,916 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:47:47,917 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:47:47,923 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:47:47,933 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:47:47,936 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:47:47,937 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:47:47,940 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:47:47,942 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:47:47,951 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:47:47,952 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:47:47,952 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:47:47,954 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:47:47,955 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:47:47,956 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:47:47,957 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:47:47,958 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:47:47,960 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:47:47,961 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:47:47,962 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:47:47,963 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:47:47,963 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:47:47,964 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:47:47,984 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:47:47,986 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:47:47,987 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:47:47,993 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7750068f-884e-42b1-806b-f0f9634fb7fc/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-07 01:47:48,040 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:47:48,040 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:47:48,041 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:47:48,041 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:47:48,042 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:47:48,042 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:47:48,042 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:47:48,043 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:47:48,043 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:47:48,044 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:47:48,044 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:47:48,044 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:47:48,045 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:47:48,045 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:47:48,045 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:47:48,045 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:47:48,046 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:47:48,046 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 01:47:48,046 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 01:47:48,046 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:47:48,047 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:47:48,047 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:47:48,047 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:47:48,047 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:47:48,048 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 01:47:48,048 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:47:48,048 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:47:48,048 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:47:48,049 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:47:48,049 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:47:48,049 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 01:47:48,049 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 01:47:48,050 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:47:48,050 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:47:48,050 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:47:48,051 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_7750068f-884e-42b1-806b-f0f9634fb7fc/bin/utaipan-UUZaoUuFF8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7750068f-884e-42b1-806b-f0f9634fb7fc/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1b47128f3a13b8a14fa5679442cf3dce52b78403c71ab556b465499f91ebd451 [2021-11-07 01:47:48,421 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:47:48,445 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:47:48,449 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:47:48,450 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:47:48,451 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:47:48,452 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7750068f-884e-42b1-806b-f0f9634fb7fc/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/loop-floats-scientific-comp/loop2-1.c [2021-11-07 01:47:48,537 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7750068f-884e-42b1-806b-f0f9634fb7fc/bin/utaipan-UUZaoUuFF8/data/a6a3e7c34/7aa3d85424c043918f65317b3934a3dc/FLAG8dd31046a [2021-11-07 01:47:49,105 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:47:49,106 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7750068f-884e-42b1-806b-f0f9634fb7fc/sv-benchmarks/c/loop-floats-scientific-comp/loop2-1.c [2021-11-07 01:47:49,115 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7750068f-884e-42b1-806b-f0f9634fb7fc/bin/utaipan-UUZaoUuFF8/data/a6a3e7c34/7aa3d85424c043918f65317b3934a3dc/FLAG8dd31046a [2021-11-07 01:47:49,473 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7750068f-884e-42b1-806b-f0f9634fb7fc/bin/utaipan-UUZaoUuFF8/data/a6a3e7c34/7aa3d85424c043918f65317b3934a3dc [2021-11-07 01:47:49,476 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:47:49,478 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:47:49,479 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:47:49,480 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:47:49,483 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:47:49,484 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:47:49" (1/1) ... [2021-11-07 01:47:49,486 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6abf8cd2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:47:49, skipping insertion in model container [2021-11-07 01:47:49,486 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:47:49" (1/1) ... [2021-11-07 01:47:49,494 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:47:49,510 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:47:49,666 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_7750068f-884e-42b1-806b-f0f9634fb7fc/sv-benchmarks/c/loop-floats-scientific-comp/loop2-1.c[474,487] [2021-11-07 01:47:49,688 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:47:49,703 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 01:47:49,727 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_7750068f-884e-42b1-806b-f0f9634fb7fc/sv-benchmarks/c/loop-floats-scientific-comp/loop2-1.c[474,487] [2021-11-07 01:47:49,737 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:47:49,779 INFO L208 MainTranslator]: Completed translation [2021-11-07 01:47:49,779 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:47:49 WrapperNode [2021-11-07 01:47:49,780 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:47:49,781 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 01:47:49,798 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 01:47:49,798 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 01:47:49,807 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:47:49" (1/1) ... [2021-11-07 01:47:49,822 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:47:49" (1/1) ... [2021-11-07 01:47:49,847 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 01:47:49,848 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 01:47:49,848 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 01:47:49,848 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 01:47:49,855 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:47:49" (1/1) ... [2021-11-07 01:47:49,856 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:47:49" (1/1) ... [2021-11-07 01:47:49,860 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:47:49" (1/1) ... [2021-11-07 01:47:49,861 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:47:49" (1/1) ... [2021-11-07 01:47:49,870 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:47:49" (1/1) ... [2021-11-07 01:47:49,875 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:47:49" (1/1) ... [2021-11-07 01:47:49,878 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:47:49" (1/1) ... [2021-11-07 01:47:49,882 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 01:47:49,883 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 01:47:49,884 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 01:47:49,884 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 01:47:49,885 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:47:49" (1/1) ... [2021-11-07 01:47:49,894 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:47:49,908 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7750068f-884e-42b1-806b-f0f9634fb7fc/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:47:49,922 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7750068f-884e-42b1-806b-f0f9634fb7fc/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 01:47:49,932 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7750068f-884e-42b1-806b-f0f9634fb7fc/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 01:47:49,970 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 01:47:49,970 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 01:47:49,970 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 01:47:49,970 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 01:47:55,396 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 01:47:55,397 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2021-11-07 01:47:55,399 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:47:55 BoogieIcfgContainer [2021-11-07 01:47:55,399 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 01:47:55,402 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 01:47:55,402 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 01:47:55,406 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 01:47:55,406 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:47:49" (1/3) ... [2021-11-07 01:47:55,407 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14dc841d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:47:55, skipping insertion in model container [2021-11-07 01:47:55,407 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:47:49" (2/3) ... [2021-11-07 01:47:55,408 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14dc841d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:47:55, skipping insertion in model container [2021-11-07 01:47:55,408 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:47:55" (3/3) ... [2021-11-07 01:47:55,410 INFO L111 eAbstractionObserver]: Analyzing ICFG loop2-1.c [2021-11-07 01:47:55,417 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 01:47:55,418 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-07 01:47:55,475 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 01:47:55,484 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 [2021-11-07 01:47:55,484 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-07 01:47:55,499 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) [2021-11-07 01:47:55,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-07 01:47:55,506 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:47:55,506 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:47:55,507 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:47:55,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:47:55,527 INFO L85 PathProgramCache]: Analyzing trace with hash 119997515, now seen corresponding path program 1 times [2021-11-07 01:47:55,542 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:47:55,542 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2061942524] [2021-11-07 01:47:55,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:47:55,544 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:47:55,544 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7750068f-884e-42b1-806b-f0f9634fb7fc/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:47:55,555 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7750068f-884e-42b1-806b-f0f9634fb7fc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:47:55,558 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7750068f-884e-42b1-806b-f0f9634fb7fc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 01:47:55,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:47:55,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-07 01:47:55,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:47:55,879 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:47:55,879 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:47:55,945 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:47:55,946 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:47:55,946 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2061942524] [2021-11-07 01:47:55,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2061942524] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:47:55,947 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:47:55,948 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 01:47:55,950 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513021418] [2021-11-07 01:47:55,956 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 01:47:55,957 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:47:55,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 01:47:55,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 01:47:55,985 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) [2021-11-07 01:47:56,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:47:56,006 INFO L93 Difference]: Finished difference Result 29 states and 38 transitions. [2021-11-07 01:47:56,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 01:47:56,009 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 [2021-11-07 01:47:56,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:47:56,019 INFO L225 Difference]: With dead ends: 29 [2021-11-07 01:47:56,019 INFO L226 Difference]: Without dead ends: 12 [2021-11-07 01:47:56,022 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 [2021-11-07 01:47:56,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-11-07 01:47:56,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2021-11-07 01:47:56,056 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) [2021-11-07 01:47:56,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2021-11-07 01:47:56,059 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 8 [2021-11-07 01:47:56,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:47:56,060 INFO L470 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2021-11-07 01:47:56,060 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) [2021-11-07 01:47:56,061 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2021-11-07 01:47:56,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-07 01:47:56,062 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:47:56,062 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:47:56,085 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7750068f-884e-42b1-806b-f0f9634fb7fc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 01:47:56,284 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7750068f-884e-42b1-806b-f0f9634fb7fc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:47:56,285 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:47:56,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:47:56,286 INFO L85 PathProgramCache]: Analyzing trace with hash -2105434535, now seen corresponding path program 1 times [2021-11-07 01:47:56,287 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:47:56,287 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1287579158] [2021-11-07 01:47:56,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:47:56,287 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:47:56,288 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7750068f-884e-42b1-806b-f0f9634fb7fc/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:47:56,289 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7750068f-884e-42b1-806b-f0f9634fb7fc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:47:56,300 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7750068f-884e-42b1-806b-f0f9634fb7fc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 01:47:57,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:47:57,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:47:57,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:47:57,307 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:47:57,307 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:47:57,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:47:57,410 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:47:57,410 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1287579158] [2021-11-07 01:47:57,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1287579158] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:47:57,410 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:47:57,410 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:47:57,411 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639976906] [2021-11-07 01:47:57,420 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:47:57,420 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:47:57,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:47:57,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:47:57,422 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) [2021-11-07 01:48:02,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:48:02,370 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2021-11-07 01:48:02,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:48:02,371 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 [2021-11-07 01:48:02,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:48:02,371 INFO L225 Difference]: With dead ends: 24 [2021-11-07 01:48:02,372 INFO L226 Difference]: Without dead ends: 16 [2021-11-07 01:48:02,372 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 [2021-11-07 01:48:02,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-11-07 01:48:02,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 14. [2021-11-07 01:48:02,377 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) [2021-11-07 01:48:02,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2021-11-07 01:48:02,378 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 11 [2021-11-07 01:48:02,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:48:02,378 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2021-11-07 01:48:02,379 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) [2021-11-07 01:48:02,379 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2021-11-07 01:48:02,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-07 01:48:02,380 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:48:02,380 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:48:02,408 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7750068f-884e-42b1-806b-f0f9634fb7fc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-11-07 01:48:02,604 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7750068f-884e-42b1-806b-f0f9634fb7fc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:48:02,605 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:48:02,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:48:02,606 INFO L85 PathProgramCache]: Analyzing trace with hash -2048176233, now seen corresponding path program 1 times [2021-11-07 01:48:02,606 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:48:02,607 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1793578432] [2021-11-07 01:48:02,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:48:02,607 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:48:02,607 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7750068f-884e-42b1-806b-f0f9634fb7fc/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:48:02,608 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7750068f-884e-42b1-806b-f0f9634fb7fc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:48:02,613 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7750068f-884e-42b1-806b-f0f9634fb7fc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 01:48:03,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-07 01:48:03,513 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-07 01:48:04,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-07 01:48:04,493 INFO L133 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2021-11-07 01:48:04,494 INFO L627 BasicCegarLoop]: Counterexample is feasible [2021-11-07 01:48:04,495 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-11-07 01:48:04,536 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7750068f-884e-42b1-806b-f0f9634fb7fc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 01:48:04,698 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7750068f-884e-42b1-806b-f0f9634fb7fc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:48:04,701 INFO L731 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2021-11-07 01:48:04,704 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-07 01:48:04,742 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 01:48:04 BoogieIcfgContainer [2021-11-07 01:48:04,742 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-07 01:48:04,743 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-07 01:48:04,743 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-07 01:48:04,744 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-07 01:48:04,744 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:47:55" (3/4) ... [2021-11-07 01:48:04,747 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-11-07 01:48:04,806 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7750068f-884e-42b1-806b-f0f9634fb7fc/bin/utaipan-UUZaoUuFF8/witness.graphml [2021-11-07 01:48:04,806 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-07 01:48:04,808 INFO L168 Benchmark]: Toolchain (without parser) took 15329.08 ms. Allocated memory was 56.6 MB in the beginning and 73.4 MB in the end (delta: 16.8 MB). Free memory was 35.2 MB in the beginning and 44.4 MB in the end (delta: -9.3 MB). Peak memory consumption was 9.7 MB. Max. memory is 16.1 GB. [2021-11-07 01:48:04,809 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 56.6 MB. Free memory is still 37.6 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 01:48:04,810 INFO L168 Benchmark]: CACSL2BoogieTranslator took 300.73 ms. Allocated memory was 56.6 MB in the beginning and 73.4 MB in the end (delta: 16.8 MB). Free memory was 35.0 MB in the beginning and 57.4 MB in the end (delta: -22.4 MB). Peak memory consumption was 16.3 MB. Max. memory is 16.1 GB. [2021-11-07 01:48:04,811 INFO L168 Benchmark]: Boogie Procedure Inliner took 66.24 ms. Allocated memory is still 73.4 MB. Free memory was 57.4 MB in the beginning and 55.9 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-11-07 01:48:04,812 INFO L168 Benchmark]: Boogie Preprocessor took 34.76 ms. Allocated memory is still 73.4 MB. Free memory was 55.9 MB in the beginning and 54.5 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 01:48:04,812 INFO L168 Benchmark]: RCFGBuilder took 5516.04 ms. Allocated memory is still 73.4 MB. Free memory was 54.5 MB in the beginning and 44.1 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-11-07 01:48:04,813 INFO L168 Benchmark]: TraceAbstraction took 9340.65 ms. Allocated memory is still 73.4 MB. Free memory was 43.7 MB in the beginning and 46.5 MB in the end (delta: -2.8 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 01:48:04,814 INFO L168 Benchmark]: Witness Printer took 63.10 ms. Allocated memory is still 73.4 MB. Free memory was 46.5 MB in the beginning and 44.4 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-11-07 01:48:04,818 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 56.6 MB. Free memory is still 37.6 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 300.73 ms. Allocated memory was 56.6 MB in the beginning and 73.4 MB in the end (delta: 16.8 MB). Free memory was 35.0 MB in the beginning and 57.4 MB in the end (delta: -22.4 MB). Peak memory consumption was 16.3 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 66.24 ms. Allocated memory is still 73.4 MB. Free memory was 57.4 MB in the beginning and 55.9 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 34.76 ms. Allocated memory is still 73.4 MB. Free memory was 55.9 MB in the beginning and 54.5 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 5516.04 ms. Allocated memory is still 73.4 MB. Free memory was 54.5 MB in the beginning and 44.1 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 9340.65 ms. Allocated memory is still 73.4 MB. Free memory was 43.7 MB in the beginning and 46.5 MB in the end (delta: -2.8 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 63.10 ms. Allocated memory is still 73.4 MB. Free memory was 46.5 MB in the beginning and 44.4 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: 9.2s, OverallIterations: 3, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 5.0s, 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, 4.7s 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, 1.8s 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! [2021-11-07 01:48:04,942 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7750068f-884e-42b1-806b-f0f9634fb7fc/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE