/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain OctagonDomain -i ../sv-benchmarks/c/loops/nec11.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 04:58:52,784 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 04:58:52,785 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 04:58:52,812 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 04:58:52,812 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 04:58:52,814 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 04:58:52,816 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 04:58:52,818 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 04:58:52,821 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 04:58:52,825 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 04:58:52,826 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 04:58:52,827 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 04:58:52,828 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 04:58:52,830 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 04:58:52,831 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 04:58:52,832 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 04:58:52,832 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 04:58:52,833 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 04:58:52,834 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 04:58:52,838 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 04:58:52,839 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 04:58:52,839 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 04:58:52,840 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 04:58:52,841 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 04:58:52,846 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 04:58:52,846 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 04:58:52,846 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 04:58:52,847 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 04:58:52,847 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 04:58:52,848 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 04:58:52,848 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 04:58:52,849 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 04:58:52,850 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 04:58:52,850 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 04:58:52,851 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 04:58:52,851 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 04:58:52,851 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 04:58:52,852 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 04:58:52,852 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 04:58:52,852 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 04:58:52,853 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 04:58:52,853 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-01 04:58:52,871 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 04:58:52,871 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 04:58:52,872 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 04:58:52,872 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 04:58:52,872 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 04:58:52,872 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 04:58:52,872 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 04:58:52,873 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 04:58:52,873 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 04:58:52,873 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 04:58:52,873 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 04:58:52,873 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 04:58:52,873 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 04:58:52,873 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 04:58:52,873 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 04:58:52,873 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 04:58:52,873 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 04:58:52,873 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 04:58:52,874 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 04:58:52,874 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 04:58:52,874 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 04:58:52,874 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 04:58:52,874 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 04:58:52,874 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 04:58:52,874 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 04:58:52,874 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 04:58:52,874 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 04:58:52,875 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 04:58:52,875 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 04:58:52,875 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 04:58:52,875 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 04:58:52,875 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 04:58:52,875 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 04:58:52,875 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 04:58:52,875 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 04:58:52,875 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 04:58:52,875 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 04:58:52,876 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 04:58:52,876 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 04:58:52,876 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 04:58:52,876 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 04:58:52,876 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 04:58:53,070 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 04:58:53,090 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 04:58:53,092 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 04:58:53,092 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 04:58:53,093 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 04:58:53,094 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops/nec11.c [2023-04-01 04:58:54,161 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 04:58:54,400 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 04:58:54,401 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops/nec11.c [2023-04-01 04:58:54,408 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3c95edc01/902598e718bc4b6495f1dfdb482b9a50/FLAGafbbe3bbf [2023-04-01 04:58:54,786 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3c95edc01/902598e718bc4b6495f1dfdb482b9a50 [2023-04-01 04:58:54,788 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 04:58:54,789 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 04:58:54,789 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 04:58:54,790 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 04:58:54,795 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 04:58:54,795 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 04:58:54" (1/1) ... [2023-04-01 04:58:54,800 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@715314b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:58:54, skipping insertion in model container [2023-04-01 04:58:54,801 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 04:58:54" (1/1) ... [2023-04-01 04:58:54,808 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 04:58:54,816 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 04:58:54,909 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops/nec11.c[317,330] [2023-04-01 04:58:54,918 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 04:58:54,924 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 04:58:54,933 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops/nec11.c[317,330] [2023-04-01 04:58:54,937 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 04:58:54,946 INFO L208 MainTranslator]: Completed translation [2023-04-01 04:58:54,947 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:58:54 WrapperNode [2023-04-01 04:58:54,947 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 04:58:54,948 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 04:58:54,948 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 04:58:54,948 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 04:58:54,955 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:58:54" (1/1) ... [2023-04-01 04:58:54,955 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:58:54" (1/1) ... [2023-04-01 04:58:54,960 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:58:54" (1/1) ... [2023-04-01 04:58:54,960 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:58:54" (1/1) ... [2023-04-01 04:58:54,972 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:58:54" (1/1) ... [2023-04-01 04:58:54,975 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:58:54" (1/1) ... [2023-04-01 04:58:54,975 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:58:54" (1/1) ... [2023-04-01 04:58:54,976 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:58:54" (1/1) ... [2023-04-01 04:58:54,977 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 04:58:54,977 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 04:58:54,978 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 04:58:54,978 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 04:58:54,978 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:58:54" (1/1) ... [2023-04-01 04:58:54,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 04:58:54,991 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:58:55,006 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) [2023-04-01 04:58:55,022 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 [2023-04-01 04:58:55,057 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 04:58:55,057 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 04:58:55,057 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 04:58:55,058 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-01 04:58:55,058 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 04:58:55,058 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 04:58:55,058 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 04:58:55,058 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 04:58:55,058 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 04:58:55,059 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-01 04:58:55,059 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2023-04-01 04:58:55,059 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 04:58:55,059 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 04:58:55,059 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 04:58:55,059 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 04:58:55,059 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 04:58:55,059 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 04:58:55,059 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 04:58:55,109 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 04:58:55,110 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 04:58:55,193 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 04:58:55,218 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 04:58:55,219 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 04:58:55,220 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 04:58:55 BoogieIcfgContainer [2023-04-01 04:58:55,220 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 04:58:55,222 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 04:58:55,222 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 04:58:55,224 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 04:58:55,224 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 04:58:54" (1/3) ... [2023-04-01 04:58:55,224 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55865078 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 04:58:55, skipping insertion in model container [2023-04-01 04:58:55,224 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:58:54" (2/3) ... [2023-04-01 04:58:55,225 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55865078 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 04:58:55, skipping insertion in model container [2023-04-01 04:58:55,225 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 04:58:55" (3/3) ... [2023-04-01 04:58:55,225 INFO L112 eAbstractionObserver]: Analyzing ICFG nec11.c [2023-04-01 04:58:55,237 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 04:58:55,238 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 04:58:55,268 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 04:58:55,272 INFO L357 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@717c6dde, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 04:58:55,273 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 04:58:55,275 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 10 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 04:58:55,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-04-01 04:58:55,280 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:58:55,281 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:58:55,281 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:58:55,286 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:58:55,286 INFO L85 PathProgramCache]: Analyzing trace with hash 733836111, now seen corresponding path program 1 times [2023-04-01 04:58:55,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:58:55,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978288926] [2023-04-01 04:58:55,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:58:55,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:58:55,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-04-01 04:58:55,393 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-04-01 04:58:55,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-04-01 04:58:55,435 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2023-04-01 04:58:55,438 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-04-01 04:58:55,439 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-04-01 04:58:55,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 04:58:55,443 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-04-01 04:58:55,446 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-04-01 04:58:55,459 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.04 04:58:55 BoogieIcfgContainer [2023-04-01 04:58:55,459 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-04-01 04:58:55,460 INFO L158 Benchmark]: Toolchain (without parser) took 671.03ms. Allocated memory is still 191.9MB. Free memory was 162.0MB in the beginning and 124.3MB in the end (delta: 37.7MB). Peak memory consumption was 37.7MB. Max. memory is 8.0GB. [2023-04-01 04:58:55,460 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 191.9MB. Free memory was 148.5MB in the beginning and 148.4MB in the end (delta: 78.5kB). There was no memory consumed. Max. memory is 8.0GB. [2023-04-01 04:58:55,461 INFO L158 Benchmark]: CACSL2BoogieTranslator took 157.59ms. Allocated memory is still 191.9MB. Free memory was 161.8MB in the beginning and 151.5MB in the end (delta: 10.3MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2023-04-01 04:58:55,462 INFO L158 Benchmark]: Boogie Preprocessor took 29.14ms. Allocated memory is still 191.9MB. Free memory was 151.5MB in the beginning and 150.4MB in the end (delta: 1.1MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2023-04-01 04:58:55,462 INFO L158 Benchmark]: RCFGBuilder took 243.06ms. Allocated memory is still 191.9MB. Free memory was 150.3MB in the beginning and 138.7MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2023-04-01 04:58:55,465 INFO L158 Benchmark]: TraceAbstraction took 237.55ms. Allocated memory is still 191.9MB. Free memory was 137.9MB in the beginning and 124.3MB in the end (delta: 13.6MB). Peak memory consumption was 13.6MB. Max. memory is 8.0GB. [2023-04-01 04:58:55,469 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09ms. Allocated memory is still 191.9MB. Free memory was 148.5MB in the beginning and 148.4MB in the end (delta: 78.5kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 157.59ms. Allocated memory is still 191.9MB. Free memory was 161.8MB in the beginning and 151.5MB in the end (delta: 10.3MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * Boogie Preprocessor took 29.14ms. Allocated memory is still 191.9MB. Free memory was 151.5MB in the beginning and 150.4MB in the end (delta: 1.1MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 243.06ms. Allocated memory is still 191.9MB. Free memory was 150.3MB in the beginning and 138.7MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * TraceAbstraction took 237.55ms. Allocated memory is still 191.9MB. Free memory was 137.9MB in the beginning and 124.3MB in the end (delta: 13.6MB). Peak memory consumption was 13.6MB. Max. memory is 8.0GB. * 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: 7]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L15] int a[5]; [L16] int len=0; [L17] _Bool c=__VERIFIER_nondet_bool(); [L18] int i; VAL [len=0] [L21] COND FALSE !(\read(c)) VAL [c=0, len=0] [L30] CALL __VERIFIER_assert(len==5) VAL [\old(cond)=0] [L6] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L7] reach_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 19 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 0.2s, OverallIterations: 1, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: , PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=17occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 10 NumberOfCodeBlocks, 10 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 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! [2023-04-01 04:58:55,499 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...