./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loop-floats-scientific-comp/loop1-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ff03de63 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/loop-floats-scientific-comp/loop1-2.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash cc6c31757d65ac3409144284524de01d782484107762f8e5c588ca3f4aed3437 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 12:04:07,822 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 12:04:07,823 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 12:04:07,876 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 12:04:07,877 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 12:04:07,880 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 12:04:07,881 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 12:04:07,885 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 12:04:07,887 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 12:04:07,890 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 12:04:07,891 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 12:04:07,892 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 12:04:07,892 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 12:04:07,894 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 12:04:07,895 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 12:04:07,896 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 12:04:07,896 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 12:04:07,897 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 12:04:07,904 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 12:04:07,905 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 12:04:07,905 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 12:04:07,920 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 12:04:07,920 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 12:04:07,921 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 12:04:07,922 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 12:04:07,923 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 12:04:07,923 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 12:04:07,923 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 12:04:07,923 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 12:04:07,924 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 12:04:07,924 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 12:04:07,925 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 12:04:07,925 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 12:04:07,925 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 12:04:07,926 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 12:04:07,926 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 12:04:07,926 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 12:04:07,927 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 12:04:07,927 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 12:04:07,927 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 12:04:07,928 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 12:04:07,928 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-21 12:04:07,942 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 12:04:07,944 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 12:04:07,945 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 12:04:07,945 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 12:04:07,946 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 12:04:07,946 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 12:04:07,946 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 12:04:07,946 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 12:04:07,947 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 12:04:07,947 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 12:04:07,947 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-21 12:04:07,948 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 12:04:07,948 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-21 12:04:07,948 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 12:04:07,948 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-21 12:04:07,948 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 12:04:07,948 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-21 12:04:07,949 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-21 12:04:07,949 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-21 12:04:07,949 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 12:04:07,949 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-21 12:04:07,949 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 12:04:07,949 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 12:04:07,949 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 12:04:07,950 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 12:04:07,950 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 12:04:07,950 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 12:04:07,951 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-21 12:04:07,951 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-21 12:04:07,951 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-21 12:04:07,952 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-21 12:04:07,952 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-21 12:04:07,952 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-21 12:04:07,952 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 12:04:07,952 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cc6c31757d65ac3409144284524de01d782484107762f8e5c588ca3f4aed3437 [2021-12-21 12:04:08,113 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 12:04:08,146 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 12:04:08,148 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 12:04:08,149 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 12:04:08,149 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 12:04:08,150 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-floats-scientific-comp/loop1-2.c [2021-12-21 12:04:08,190 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/556697fe6/0c566f4aa2204b0a8a0fc6bf6e551a50/FLAGecd071a18 [2021-12-21 12:04:08,571 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 12:04:08,572 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-floats-scientific-comp/loop1-2.c [2021-12-21 12:04:08,579 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/556697fe6/0c566f4aa2204b0a8a0fc6bf6e551a50/FLAGecd071a18 [2021-12-21 12:04:08,590 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/556697fe6/0c566f4aa2204b0a8a0fc6bf6e551a50 [2021-12-21 12:04:08,592 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 12:04:08,594 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 12:04:08,597 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 12:04:08,597 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 12:04:08,599 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 12:04:08,599 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 12:04:08" (1/1) ... [2021-12-21 12:04:08,600 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1e5c1595 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:04:08, skipping insertion in model container [2021-12-21 12:04:08,600 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 12:04:08" (1/1) ... [2021-12-21 12:04:08,605 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 12:04:08,615 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 12:04:08,730 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-floats-scientific-comp/loop1-2.c[538,551] [2021-12-21 12:04:08,758 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 12:04:08,764 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 12:04:08,774 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-floats-scientific-comp/loop1-2.c[538,551] [2021-12-21 12:04:08,778 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 12:04:08,788 INFO L208 MainTranslator]: Completed translation [2021-12-21 12:04:08,789 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:04:08 WrapperNode [2021-12-21 12:04:08,789 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 12:04:08,790 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 12:04:08,791 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 12:04:08,791 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 12:04:08,796 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:04:08" (1/1) ... [2021-12-21 12:04:08,801 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:04:08" (1/1) ... [2021-12-21 12:04:08,813 INFO L137 Inliner]: procedures = 15, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 39 [2021-12-21 12:04:08,814 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 12:04:08,814 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 12:04:08,814 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 12:04:08,815 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 12:04:08,820 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:04:08" (1/1) ... [2021-12-21 12:04:08,820 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:04:08" (1/1) ... [2021-12-21 12:04:08,822 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:04:08" (1/1) ... [2021-12-21 12:04:08,822 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:04:08" (1/1) ... [2021-12-21 12:04:08,833 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:04:08" (1/1) ... [2021-12-21 12:04:08,836 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:04:08" (1/1) ... [2021-12-21 12:04:08,837 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:04:08" (1/1) ... [2021-12-21 12:04:08,841 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 12:04:08,842 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 12:04:08,843 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 12:04:08,843 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 12:04:08,844 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:04:08" (1/1) ... [2021-12-21 12:04:08,849 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 12:04:08,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 12:04:08,901 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-21 12:04:08,918 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-21 12:04:08,934 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-21 12:04:08,934 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-21 12:04:08,935 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 12:04:08,935 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 12:04:08,978 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 12:04:08,980 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 12:04:09,055 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 12:04:09,059 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 12:04:09,059 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-21 12:04:09,060 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 12:04:09 BoogieIcfgContainer [2021-12-21 12:04:09,060 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 12:04:09,062 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 12:04:09,062 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 12:04:09,064 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 12:04:09,064 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 12:04:08" (1/3) ... [2021-12-21 12:04:09,065 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3baffd1c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 12:04:09, skipping insertion in model container [2021-12-21 12:04:09,065 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:04:08" (2/3) ... [2021-12-21 12:04:09,066 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3baffd1c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 12:04:09, skipping insertion in model container [2021-12-21 12:04:09,066 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 12:04:09" (3/3) ... [2021-12-21 12:04:09,067 INFO L111 eAbstractionObserver]: Analyzing ICFG loop1-2.c [2021-12-21 12:04:09,070 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 12:04:09,071 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-21 12:04:09,123 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 12:04:09,132 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=PETRI_NET, 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 [2021-12-21 12:04:09,133 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-21 12:04:09,153 INFO L276 IsEmpty]: Start isEmpty. Operand has 12 states, 10 states have (on average 1.5) internal successors, (15), 11 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) [2021-12-21 12:04:09,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-21 12:04:09,159 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:04:09,159 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-21 12:04:09,160 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:04:09,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:04:09,166 INFO L85 PathProgramCache]: Analyzing trace with hash 889906919, now seen corresponding path program 1 times [2021-12-21 12:04:09,175 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:04:09,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680063019] [2021-12-21 12:04:09,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:04:09,177 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:04:09,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:04:09,297 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 12:04:09,298 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 12:04:09,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680063019] [2021-12-21 12:04:09,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680063019] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 12:04:09,300 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 12:04:09,300 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 12:04:09,301 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230145047] [2021-12-21 12:04:09,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 12:04:09,305 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-21 12:04:09,305 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 12:04:09,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-21 12:04:09,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-21 12:04:09,328 INFO L87 Difference]: Start difference. First operand has 12 states, 10 states have (on average 1.5) internal successors, (15), 11 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) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 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) [2021-12-21 12:04:09,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 12:04:09,338 INFO L93 Difference]: Finished difference Result 20 states and 23 transitions. [2021-12-21 12:04:09,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-21 12:04:09,340 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 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 6 [2021-12-21 12:04:09,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 12:04:09,345 INFO L225 Difference]: With dead ends: 20 [2021-12-21 12:04:09,345 INFO L226 Difference]: Without dead ends: 8 [2021-12-21 12:04:09,348 INFO L932 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 [2021-12-21 12:04:09,351 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 12:04:09,352 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 12:04:09,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2021-12-21 12:04:09,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2021-12-21 12:04:09,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 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) [2021-12-21 12:04:09,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2021-12-21 12:04:09,372 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2021-12-21 12:04:09,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 12:04:09,372 INFO L470 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2021-12-21 12:04:09,373 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 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) [2021-12-21 12:04:09,373 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2021-12-21 12:04:09,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-21 12:04:09,373 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:04:09,374 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-21 12:04:09,374 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-21 12:04:09,374 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:04:09,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:04:09,375 INFO L85 PathProgramCache]: Analyzing trace with hash 1810664400, now seen corresponding path program 1 times [2021-12-21 12:04:09,376 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:04:09,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190888087] [2021-12-21 12:04:09,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:04:09,377 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:04:09,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-21 12:04:09,423 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-21 12:04:09,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-21 12:04:09,457 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-21 12:04:09,458 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-12-21 12:04:09,460 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-12-21 12:04:09,461 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-21 12:04:09,465 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1] [2021-12-21 12:04:09,467 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-21 12:04:09,486 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.12 12:04:09 BoogieIcfgContainer [2021-12-21 12:04:09,486 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-21 12:04:09,487 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-21 12:04:09,487 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-21 12:04:09,487 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-21 12:04:09,488 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 12:04:09" (3/4) ... [2021-12-21 12:04:09,490 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-12-21 12:04:09,490 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-21 12:04:09,492 INFO L158 Benchmark]: Toolchain (without parser) took 897.18ms. Allocated memory was 81.8MB in the beginning and 111.1MB in the end (delta: 29.4MB). Free memory was 53.1MB in the beginning and 84.6MB in the end (delta: -31.5MB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-21 12:04:09,492 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 81.8MB. Free memory was 39.5MB in the beginning and 39.5MB in the end (delta: 44.7kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-21 12:04:09,494 INFO L158 Benchmark]: CACSL2BoogieTranslator took 192.97ms. Allocated memory was 81.8MB in the beginning and 111.1MB in the end (delta: 29.4MB). Free memory was 52.9MB in the beginning and 87.2MB in the end (delta: -34.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-21 12:04:09,495 INFO L158 Benchmark]: Boogie Procedure Inliner took 23.55ms. Allocated memory is still 111.1MB. Free memory was 87.2MB in the beginning and 85.9MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-21 12:04:09,497 INFO L158 Benchmark]: Boogie Preprocessor took 27.16ms. Allocated memory is still 111.1MB. Free memory was 85.9MB in the beginning and 84.7MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-21 12:04:09,497 INFO L158 Benchmark]: RCFGBuilder took 218.30ms. Allocated memory is still 111.1MB. Free memory was 84.7MB in the beginning and 76.2MB in the end (delta: 8.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-21 12:04:09,498 INFO L158 Benchmark]: TraceAbstraction took 424.32ms. Allocated memory is still 111.1MB. Free memory was 75.8MB in the beginning and 85.0MB in the end (delta: -9.2MB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-21 12:04:09,498 INFO L158 Benchmark]: Witness Printer took 3.89ms. Allocated memory is still 111.1MB. Free memory was 85.0MB in the beginning and 84.6MB in the end (delta: 374.0kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-21 12:04:09,502 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 81.8MB. Free memory was 39.5MB in the beginning and 39.5MB in the end (delta: 44.7kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 192.97ms. Allocated memory was 81.8MB in the beginning and 111.1MB in the end (delta: 29.4MB). Free memory was 52.9MB in the beginning and 87.2MB in the end (delta: -34.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 23.55ms. Allocated memory is still 111.1MB. Free memory was 87.2MB in the beginning and 85.9MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 27.16ms. Allocated memory is still 111.1MB. Free memory was 85.9MB in the beginning and 84.7MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 218.30ms. Allocated memory is still 111.1MB. Free memory was 84.7MB in the beginning and 76.2MB in the end (delta: 8.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 424.32ms. Allocated memory is still 111.1MB. Free memory was 75.8MB in the beginning and 85.0MB in the end (delta: -9.2MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 3.89ms. Allocated memory is still 111.1MB. Free memory was 85.0MB in the beginning and 84.6MB in the end (delta: 374.0kB). There was no memory consumed. Max. memory is 16.1GB. * 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: 14]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 37, overapproximation of someBinaryArithmeticFLOAToperation at line 29. Possible FailurePath: [L20] float x = __VERIFIER_nondet_float() ; [L21] float exp = 1.0 ; [L22] float term = 1.0 ; [L23] unsigned int count = 1 ; [L24] float result = 2*(1/(1-x)) ; [L25] int temp ; VAL [count=1, exp=1, term=1] [L27] COND TRUE 1 [L29] term = term * (x/count) [L30] exp = exp + term [L31] count++ [L33] temp = __VERIFIER_nondet_int() [L34] COND TRUE temp ==0 VAL [count=2, temp=0] [L37] CALL __VERIFIER_assert( result >= exp ) [L14] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L14] reach_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 12 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 0.3s, 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: 0 mSolverCounterUnknown, 0 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 0 mSDsluCounter, 12 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 0 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 0 IncrementalHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 0 mSolverCounterUnsat, 12 mSDtfsCounter, 0 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, 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=12occurred in iteration=0, InterpolantAutomatonStates: 2, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 13 NumberOfCodeBlocks, 13 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 5 ConstructedInterpolants, 0 QuantifiedInterpolants, 5 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 [2021-12-21 12:04:09,542 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with 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=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/loop-floats-scientific-comp/loop1-2.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash cc6c31757d65ac3409144284524de01d782484107762f8e5c588ca3f4aed3437 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 12:04:11,190 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 12:04:11,193 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 12:04:11,222 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 12:04:11,223 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 12:04:11,239 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 12:04:11,241 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 12:04:11,244 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 12:04:11,246 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 12:04:11,248 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 12:04:11,249 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 12:04:11,250 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 12:04:11,251 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 12:04:11,252 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 12:04:11,253 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 12:04:11,254 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 12:04:11,254 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 12:04:11,255 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 12:04:11,256 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 12:04:11,257 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 12:04:11,258 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 12:04:11,263 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 12:04:11,264 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 12:04:11,266 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 12:04:11,271 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 12:04:11,275 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 12:04:11,276 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 12:04:11,277 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 12:04:11,278 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 12:04:11,278 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 12:04:11,279 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 12:04:11,279 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 12:04:11,280 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 12:04:11,282 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 12:04:11,283 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 12:04:11,283 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 12:04:11,284 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 12:04:11,284 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 12:04:11,284 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 12:04:11,285 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 12:04:11,286 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 12:04:11,286 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2021-12-21 12:04:11,315 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 12:04:11,315 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 12:04:11,316 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 12:04:11,316 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 12:04:11,317 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 12:04:11,317 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 12:04:11,318 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 12:04:11,318 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 12:04:11,318 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 12:04:11,318 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 12:04:11,319 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-21 12:04:11,319 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-21 12:04:11,319 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 12:04:11,319 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-21 12:04:11,320 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 12:04:11,320 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-21 12:04:11,320 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-21 12:04:11,320 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-12-21 12:04:11,320 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-12-21 12:04:11,320 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-21 12:04:11,320 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-21 12:04:11,321 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 12:04:11,321 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-21 12:04:11,321 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 12:04:11,321 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 12:04:11,321 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 12:04:11,321 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 12:04:11,322 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 12:04:11,322 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 12:04:11,322 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-21 12:04:11,322 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-12-21 12:04:11,322 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-12-21 12:04:11,322 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-21 12:04:11,323 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-21 12:04:11,323 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-21 12:04:11,323 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 12:04:11,323 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-12-21 12:04:11,323 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:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cc6c31757d65ac3409144284524de01d782484107762f8e5c588ca3f4aed3437 [2021-12-21 12:04:11,613 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 12:04:11,627 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 12:04:11,629 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 12:04:11,630 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 12:04:11,630 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 12:04:11,631 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-floats-scientific-comp/loop1-2.c [2021-12-21 12:04:11,681 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0b45a9dee/b196ec1657b743e09b714d6efde62fc7/FLAG781b9673b [2021-12-21 12:04:12,022 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 12:04:12,022 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-floats-scientific-comp/loop1-2.c [2021-12-21 12:04:12,027 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0b45a9dee/b196ec1657b743e09b714d6efde62fc7/FLAG781b9673b [2021-12-21 12:04:12,444 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0b45a9dee/b196ec1657b743e09b714d6efde62fc7 [2021-12-21 12:04:12,447 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 12:04:12,450 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 12:04:12,451 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 12:04:12,451 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 12:04:12,454 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 12:04:12,455 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 12:04:12" (1/1) ... [2021-12-21 12:04:12,456 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@38292640 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:04:12, skipping insertion in model container [2021-12-21 12:04:12,457 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 12:04:12" (1/1) ... [2021-12-21 12:04:12,462 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 12:04:12,472 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 12:04:12,584 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-floats-scientific-comp/loop1-2.c[538,551] [2021-12-21 12:04:12,597 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 12:04:12,606 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 12:04:12,617 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-floats-scientific-comp/loop1-2.c[538,551] [2021-12-21 12:04:12,622 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 12:04:12,634 INFO L208 MainTranslator]: Completed translation [2021-12-21 12:04:12,635 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:04:12 WrapperNode [2021-12-21 12:04:12,635 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 12:04:12,636 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 12:04:12,636 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 12:04:12,636 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 12:04:12,677 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:04:12" (1/1) ... [2021-12-21 12:04:12,685 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:04:12" (1/1) ... [2021-12-21 12:04:12,698 INFO L137 Inliner]: procedures = 16, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 39 [2021-12-21 12:04:12,699 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 12:04:12,699 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 12:04:12,700 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 12:04:12,700 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 12:04:12,705 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:04:12" (1/1) ... [2021-12-21 12:04:12,705 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:04:12" (1/1) ... [2021-12-21 12:04:12,716 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:04:12" (1/1) ... [2021-12-21 12:04:12,716 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:04:12" (1/1) ... [2021-12-21 12:04:12,729 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:04:12" (1/1) ... [2021-12-21 12:04:12,733 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:04:12" (1/1) ... [2021-12-21 12:04:12,735 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:04:12" (1/1) ... [2021-12-21 12:04:12,737 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 12:04:12,740 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 12:04:12,740 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 12:04:12,741 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 12:04:12,741 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:04:12" (1/1) ... [2021-12-21 12:04:12,747 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 12:04:12,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 12:04:12,797 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-21 12:04:12,823 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-21 12:04:12,846 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-21 12:04:12,846 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-12-21 12:04:12,846 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 12:04:12,846 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 12:04:12,895 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 12:04:12,896 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 12:04:15,314 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 12:04:15,317 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 12:04:15,317 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-21 12:04:15,318 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 12:04:15 BoogieIcfgContainer [2021-12-21 12:04:15,319 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 12:04:15,320 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 12:04:15,320 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 12:04:15,321 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 12:04:15,322 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 12:04:12" (1/3) ... [2021-12-21 12:04:15,322 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3cf48fe8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 12:04:15, skipping insertion in model container [2021-12-21 12:04:15,322 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:04:12" (2/3) ... [2021-12-21 12:04:15,322 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3cf48fe8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 12:04:15, skipping insertion in model container [2021-12-21 12:04:15,322 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 12:04:15" (3/3) ... [2021-12-21 12:04:15,323 INFO L111 eAbstractionObserver]: Analyzing ICFG loop1-2.c [2021-12-21 12:04:15,327 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 12:04:15,327 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-21 12:04:15,355 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 12:04:15,359 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=PETRI_NET, 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 [2021-12-21 12:04:15,360 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-21 12:04:15,370 INFO L276 IsEmpty]: Start isEmpty. Operand has 12 states, 10 states have (on average 1.5) internal successors, (15), 11 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) [2021-12-21 12:04:15,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-21 12:04:15,373 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:04:15,374 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-21 12:04:15,374 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:04:15,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:04:15,378 INFO L85 PathProgramCache]: Analyzing trace with hash 889906919, now seen corresponding path program 1 times [2021-12-21 12:04:15,385 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 12:04:15,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [888173517] [2021-12-21 12:04:15,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:04:15,386 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 12:04:15,387 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 12:04:15,405 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-21 12:04:15,406 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-12-21 12:04:15,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:04:15,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 24 conjuncts, 1 conjunts are in the unsatisfiable core [2021-12-21 12:04:15,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 12:04:15,635 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 12:04:15,635 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 12:04:15,636 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 12:04:15,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [888173517] [2021-12-21 12:04:15,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [888173517] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 12:04:15,637 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 12:04:15,637 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 12:04:15,638 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881321441] [2021-12-21 12:04:15,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 12:04:15,641 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-21 12:04:15,641 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 12:04:15,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-21 12:04:15,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-21 12:04:15,660 INFO L87 Difference]: Start difference. First operand has 12 states, 10 states have (on average 1.5) internal successors, (15), 11 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) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 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) [2021-12-21 12:04:15,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 12:04:15,668 INFO L93 Difference]: Finished difference Result 20 states and 23 transitions. [2021-12-21 12:04:15,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-21 12:04:15,670 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 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 6 [2021-12-21 12:04:15,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 12:04:15,674 INFO L225 Difference]: With dead ends: 20 [2021-12-21 12:04:15,675 INFO L226 Difference]: Without dead ends: 8 [2021-12-21 12:04:15,676 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-21 12:04:15,679 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 12:04:15,680 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 12:04:15,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2021-12-21 12:04:15,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2021-12-21 12:04:15,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 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) [2021-12-21 12:04:15,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2021-12-21 12:04:15,699 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2021-12-21 12:04:15,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 12:04:15,699 INFO L470 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2021-12-21 12:04:15,699 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 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) [2021-12-21 12:04:15,699 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2021-12-21 12:04:15,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-21 12:04:15,700 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:04:15,700 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-21 12:04:15,711 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-12-21 12:04:15,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 12:04:15,912 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:04:15,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:04:15,913 INFO L85 PathProgramCache]: Analyzing trace with hash 1810664400, now seen corresponding path program 1 times [2021-12-21 12:04:15,913 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 12:04:15,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1775157699] [2021-12-21 12:04:15,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:04:15,914 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 12:04:15,914 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 12:04:15,915 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-21 12:04:15,917 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-12-21 12:04:16,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-21 12:04:16,339 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-21 12:04:16,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-21 12:04:16,816 INFO L133 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2021-12-21 12:04:16,816 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-12-21 12:04:16,817 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-12-21 12:04:16,838 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-12-21 12:04:17,019 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 12:04:17,023 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1] [2021-12-21 12:04:17,025 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-21 12:04:17,049 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.12 12:04:17 BoogieIcfgContainer [2021-12-21 12:04:17,049 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-21 12:04:17,050 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-21 12:04:17,050 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-21 12:04:17,050 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-21 12:04:17,051 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 12:04:15" (3/4) ... [2021-12-21 12:04:17,053 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-12-21 12:04:17,084 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-12-21 12:04:17,084 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-21 12:04:17,085 INFO L158 Benchmark]: Toolchain (without parser) took 4634.62ms. Allocated memory was 67.1MB in the beginning and 98.6MB in the end (delta: 31.5MB). Free memory was 48.8MB in the beginning and 66.2MB in the end (delta: -17.3MB). Peak memory consumption was 13.1MB. Max. memory is 16.1GB. [2021-12-21 12:04:17,085 INFO L158 Benchmark]: CDTParser took 0.28ms. Allocated memory is still 67.1MB. Free memory was 50.1MB in the beginning and 50.0MB in the end (delta: 48.9kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-21 12:04:17,086 INFO L158 Benchmark]: CACSL2BoogieTranslator took 183.77ms. Allocated memory is still 67.1MB. Free memory was 48.6MB in the beginning and 38.3MB in the end (delta: 10.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-12-21 12:04:17,086 INFO L158 Benchmark]: Boogie Procedure Inliner took 62.80ms. Allocated memory is still 67.1MB. Free memory was 38.3MB in the beginning and 50.8MB in the end (delta: -12.5MB). Peak memory consumption was 3.1MB. Max. memory is 16.1GB. [2021-12-21 12:04:17,087 INFO L158 Benchmark]: Boogie Preprocessor took 39.24ms. Allocated memory is still 67.1MB. Free memory was 50.8MB in the beginning and 49.5MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-21 12:04:17,087 INFO L158 Benchmark]: RCFGBuilder took 2578.92ms. Allocated memory is still 67.1MB. Free memory was 49.5MB in the beginning and 40.7MB in the end (delta: 8.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-21 12:04:17,088 INFO L158 Benchmark]: TraceAbstraction took 1729.54ms. Allocated memory was 67.1MB in the beginning and 98.6MB in the end (delta: 31.5MB). Free memory was 40.3MB in the beginning and 68.3MB in the end (delta: -28.0MB). Peak memory consumption was 3.7MB. Max. memory is 16.1GB. [2021-12-21 12:04:17,089 INFO L158 Benchmark]: Witness Printer took 34.38ms. Allocated memory is still 98.6MB. Free memory was 68.3MB in the beginning and 66.2MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-21 12:04:17,091 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28ms. Allocated memory is still 67.1MB. Free memory was 50.1MB in the beginning and 50.0MB in the end (delta: 48.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 183.77ms. Allocated memory is still 67.1MB. Free memory was 48.6MB in the beginning and 38.3MB in the end (delta: 10.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 62.80ms. Allocated memory is still 67.1MB. Free memory was 38.3MB in the beginning and 50.8MB in the end (delta: -12.5MB). Peak memory consumption was 3.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 39.24ms. Allocated memory is still 67.1MB. Free memory was 50.8MB in the beginning and 49.5MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 2578.92ms. Allocated memory is still 67.1MB. Free memory was 49.5MB in the beginning and 40.7MB in the end (delta: 8.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 1729.54ms. Allocated memory was 67.1MB in the beginning and 98.6MB in the end (delta: 31.5MB). Free memory was 40.3MB in the beginning and 68.3MB in the end (delta: -28.0MB). Peak memory consumption was 3.7MB. Max. memory is 16.1GB. * Witness Printer took 34.38ms. Allocated memory is still 98.6MB. Free memory was 68.3MB in the beginning and 66.2MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * 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: 14]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L20] float x = __VERIFIER_nondet_float() ; [L21] float exp = 1.0 ; [L22] float term = 1.0 ; [L23] unsigned int count = 1 ; [L24] float result = 2*(1/(1-x)) ; [L25] int temp ; VAL [count=1, exp=1.0, result=-0.00000000000000000010842021724855044, term=1.0, x=18446744073709552000] [L27] COND TRUE 1 [L29] term = term * (x/count) [L30] exp = exp + term [L31] count++ [L33] temp = __VERIFIER_nondet_int() [L34] COND TRUE temp ==0 VAL [count=2, exp=18446744073709552000, result=-0.00000000000000000010842021724855044, temp=0, term=18446744073709552000, x=18446744073709552000] [L37] CALL __VERIFIER_assert( result >= exp ) [L14] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L14] reach_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 12 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 1.7s, 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: 0 mSolverCounterUnknown, 0 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 0 mSDsluCounter, 12 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 0 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 0 IncrementalHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 0 mSolverCounterUnsat, 12 mSDtfsCounter, 0 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 5 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=12occurred in iteration=0, 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, 0.6s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 13 NumberOfCodeBlocks, 13 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 5 ConstructedInterpolants, 0 QuantifiedInterpolants, 5 SizeOfPredicates, 0 NumberOfNonLiveVariables, 24 ConjunctsInSsa, 1 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-12-21 12:04:17,159 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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