/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 IntervalDomain -i ../sv-benchmarks/c/loops/ludcmp.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-31 22:58:05,666 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-31 22:58:05,668 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-31 22:58:05,698 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-03-31 22:58:05,698 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-03-31 22:58:05,700 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-03-31 22:58:05,702 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-03-31 22:58:05,704 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-03-31 22:58:05,705 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-03-31 22:58:05,708 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-03-31 22:58:05,709 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-03-31 22:58:05,711 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-03-31 22:58:05,711 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-31 22:58:05,712 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-31 22:58:05,713 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-31 22:58:05,714 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-31 22:58:05,714 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-31 22:58:05,715 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-31 22:58:05,716 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-31 22:58:05,720 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-31 22:58:05,720 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-31 22:58:05,721 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-31 22:58:05,722 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-31 22:58:05,723 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-31 22:58:05,729 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-03-31 22:58:05,729 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-03-31 22:58:05,729 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-03-31 22:58:05,730 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-03-31 22:58:05,730 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-03-31 22:58:05,731 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-03-31 22:58:05,731 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-03-31 22:58:05,731 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-03-31 22:58:05,732 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-03-31 22:58:05,733 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-03-31 22:58:05,733 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-03-31 22:58:05,733 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-03-31 22:58:05,734 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-03-31 22:58:05,734 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-03-31 22:58:05,734 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-31 22:58:05,735 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-31 22:58:05,735 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-31 22:58:05,736 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 [2023-03-31 22:58:05,757 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-31 22:58:05,758 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-31 22:58:05,758 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-31 22:58:05,758 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-31 22:58:05,759 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-31 22:58:05,759 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-31 22:58:05,759 INFO L138 SettingsManager]: * User list type=DISABLED [2023-03-31 22:58:05,759 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-03-31 22:58:05,759 INFO L138 SettingsManager]: * Explicit value domain=true [2023-03-31 22:58:05,759 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-03-31 22:58:05,760 INFO L138 SettingsManager]: * Octagon Domain=false [2023-03-31 22:58:05,760 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-03-31 22:58:05,760 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-03-31 22:58:05,760 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-03-31 22:58:05,760 INFO L138 SettingsManager]: * Interval Domain=false [2023-03-31 22:58:05,760 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-03-31 22:58:05,761 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-03-31 22:58:05,761 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-03-31 22:58:05,761 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-31 22:58:05,761 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-31 22:58:05,761 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-31 22:58:05,761 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-31 22:58:05,762 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-31 22:58:05,762 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-31 22:58:05,762 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-31 22:58:05,762 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-31 22:58:05,762 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-31 22:58:05,762 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-31 22:58:05,762 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-31 22:58:05,762 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-31 22:58:05,763 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-31 22:58:05,763 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-31 22:58:05,763 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 22:58:05,763 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-31 22:58:05,763 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-03-31 22:58:05,763 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-31 22:58:05,763 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-31 22:58:05,764 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-03-31 22:58:05,764 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-31 22:58:05,764 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-31 22:58:05,764 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-03-31 22:58:05,764 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> IntervalDomain [2023-03-31 22:58:05,943 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-31 22:58:05,957 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-31 22:58:05,959 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-31 22:58:05,960 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-31 22:58:05,961 INFO L275 PluginConnector]: CDTParser initialized [2023-03-31 22:58:05,961 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops/ludcmp.c [2023-03-31 22:58:06,908 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-31 22:58:07,146 INFO L351 CDTParser]: Found 1 translation units. [2023-03-31 22:58:07,146 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops/ludcmp.c [2023-03-31 22:58:07,152 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4f15f1a59/f004cd9561e44999b9d82b41cf2af919/FLAG9da9567f4 [2023-03-31 22:58:07,167 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4f15f1a59/f004cd9561e44999b9d82b41cf2af919 [2023-03-31 22:58:07,169 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-31 22:58:07,170 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-31 22:58:07,170 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-31 22:58:07,171 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-31 22:58:07,173 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-31 22:58:07,173 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 10:58:07" (1/1) ... [2023-03-31 22:58:07,174 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7c384a06 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:58:07, skipping insertion in model container [2023-03-31 22:58:07,174 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 10:58:07" (1/1) ... [2023-03-31 22:58:07,181 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-31 22:58:07,194 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-31 22:58:07,325 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/ludcmp.c[318,331] [2023-03-31 22:58:07,349 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 22:58:07,356 INFO L203 MainTranslator]: Completed pre-run [2023-03-31 22:58:07,373 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/ludcmp.c[318,331] [2023-03-31 22:58:07,403 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 22:58:07,425 INFO L208 MainTranslator]: Completed translation [2023-03-31 22:58:07,425 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:58:07 WrapperNode [2023-03-31 22:58:07,425 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-31 22:58:07,427 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-31 22:58:07,427 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-31 22:58:07,427 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-31 22:58:07,447 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:58:07" (1/1) ... [2023-03-31 22:58:07,447 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:58:07" (1/1) ... [2023-03-31 22:58:07,454 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:58:07" (1/1) ... [2023-03-31 22:58:07,455 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:58:07" (1/1) ... [2023-03-31 22:58:07,463 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:58:07" (1/1) ... [2023-03-31 22:58:07,467 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:58:07" (1/1) ... [2023-03-31 22:58:07,469 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:58:07" (1/1) ... [2023-03-31 22:58:07,469 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:58:07" (1/1) ... [2023-03-31 22:58:07,471 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-31 22:58:07,472 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-31 22:58:07,472 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-31 22:58:07,472 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-31 22:58:07,473 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:58:07" (1/1) ... [2023-03-31 22:58:07,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 22:58:07,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:58:07,501 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) [2023-03-31 22:58:07,516 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 [2023-03-31 22:58:07,539 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-31 22:58:07,540 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-31 22:58:07,540 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-31 22:58:07,540 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-03-31 22:58:07,540 INFO L138 BoogieDeclarations]: Found implementation of procedure fabs [2023-03-31 22:58:07,540 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-31 22:58:07,540 INFO L138 BoogieDeclarations]: Found implementation of procedure ludcmp [2023-03-31 22:58:07,540 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-31 22:58:07,540 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-31 22:58:07,541 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-31 22:58:07,541 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-31 22:58:07,541 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-03-31 22:58:07,541 INFO L130 BoogieDeclarations]: Found specification of procedure ludcmp [2023-03-31 22:58:07,541 INFO L130 BoogieDeclarations]: Found specification of procedure fabs [2023-03-31 22:58:07,541 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-31 22:58:07,541 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2023-03-31 22:58:07,541 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2023-03-31 22:58:07,541 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-03-31 22:58:07,542 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-31 22:58:07,542 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-31 22:58:07,542 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-31 22:58:07,542 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-31 22:58:07,542 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-31 22:58:07,542 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-31 22:58:07,635 INFO L236 CfgBuilder]: Building ICFG [2023-03-31 22:58:07,637 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-31 22:58:07,945 INFO L277 CfgBuilder]: Performing block encoding [2023-03-31 22:58:08,019 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-31 22:58:08,019 INFO L302 CfgBuilder]: Removed 11 assume(true) statements. [2023-03-31 22:58:08,024 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 10:58:08 BoogieIcfgContainer [2023-03-31 22:58:08,024 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-31 22:58:08,026 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-31 22:58:08,026 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-31 22:58:08,028 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-31 22:58:08,028 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.03 10:58:07" (1/3) ... [2023-03-31 22:58:08,028 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1131d50 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 10:58:08, skipping insertion in model container [2023-03-31 22:58:08,028 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:58:07" (2/3) ... [2023-03-31 22:58:08,029 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1131d50 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 10:58:08, skipping insertion in model container [2023-03-31 22:58:08,029 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 10:58:08" (3/3) ... [2023-03-31 22:58:08,029 INFO L112 eAbstractionObserver]: Analyzing ICFG ludcmp.c [2023-03-31 22:58:08,041 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-31 22:58:08,041 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-31 22:58:08,079 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-31 22:58:08,084 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;@4bf51b98, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-03-31 22:58:08,084 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-31 22:58:08,087 INFO L276 IsEmpty]: Start isEmpty. Operand has 39 states, 27 states have (on average 1.5925925925925926) internal successors, (43), 28 states have internal predecessors, (43), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-03-31 22:58:08,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-03-31 22:58:08,091 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:58:08,092 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:58:08,092 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:58:08,096 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:58:08,096 INFO L85 PathProgramCache]: Analyzing trace with hash 1816357931, now seen corresponding path program 1 times [2023-03-31 22:58:08,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:58:08,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715031617] [2023-03-31 22:58:08,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:58:08,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:58:08,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:58:08,281 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:58:08,281 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:58:08,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715031617] [2023-03-31 22:58:08,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715031617] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:58:08,282 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:58:08,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-03-31 22:58:08,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59233234] [2023-03-31 22:58:08,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:58:08,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-03-31 22:58:08,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:58:08,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-03-31 22:58:08,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-03-31 22:58:08,309 INFO L87 Difference]: Start difference. First operand has 39 states, 27 states have (on average 1.5925925925925926) internal successors, (43), 28 states have internal predecessors, (43), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 22:58:08,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:58:08,382 INFO L93 Difference]: Finished difference Result 74 states and 104 transitions. [2023-03-31 22:58:08,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-03-31 22:58:08,385 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2023-03-31 22:58:08,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:58:08,390 INFO L225 Difference]: With dead ends: 74 [2023-03-31 22:58:08,391 INFO L226 Difference]: Without dead ends: 16 [2023-03-31 22:58:08,393 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-03-31 22:58:08,395 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 6 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 22:58:08,396 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 56 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 22:58:08,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2023-03-31 22:58:08,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2023-03-31 22:58:08,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 22:58:08,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2023-03-31 22:58:08,421 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 11 [2023-03-31 22:58:08,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:58:08,422 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2023-03-31 22:58:08,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 22:58:08,422 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2023-03-31 22:58:08,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-03-31 22:58:08,423 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:58:08,423 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:58:08,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-31 22:58:08,423 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:58:08,424 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:58:08,424 INFO L85 PathProgramCache]: Analyzing trace with hash 753655936, now seen corresponding path program 1 times [2023-03-31 22:58:08,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:58:08,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884544404] [2023-03-31 22:58:08,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:58:08,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:58:08,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:58:08,546 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:58:08,547 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:58:08,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884544404] [2023-03-31 22:58:08,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884544404] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 22:58:08,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731887505] [2023-03-31 22:58:08,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:58:08,548 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:58:08,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:58:08,558 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 22:58:08,577 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-03-31 22:58:08,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:58:08,664 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-31 22:58:08,667 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 22:58:08,724 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:58:08,725 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 22:58:08,759 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:58:08,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1731887505] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 22:58:08,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2023551025] [2023-03-31 22:58:08,774 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2023-03-31 22:58:08,775 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 22:58:08,778 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 22:58:08,783 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 22:58:08,785 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 22:58:08,938 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 35 for LOIs [2023-03-31 22:58:09,030 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 25 for LOIs [2023-03-31 22:58:09,064 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 28 for LOIs [2023-03-31 22:58:09,087 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 22:58:09,379 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '264#(and (= |~#b~0.offset| 0) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |~#x~0.offset| 0) (= |~#b~0.base| 5) (= |~#x~0.base| 6) (= |#NULL.offset| 0) (= |~#a~0.offset| 0) (= |~#a~0.base| 4) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2023-03-31 22:58:09,379 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 22:58:09,379 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 22:58:09,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-03-31 22:58:09,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087703537] [2023-03-31 22:58:09,380 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 22:58:09,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-03-31 22:58:09,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:58:09,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-03-31 22:58:09,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2023-03-31 22:58:09,382 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 22:58:09,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:58:09,422 INFO L93 Difference]: Finished difference Result 30 states and 35 transitions. [2023-03-31 22:58:09,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-31 22:58:09,422 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2023-03-31 22:58:09,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:58:09,423 INFO L225 Difference]: With dead ends: 30 [2023-03-31 22:58:09,423 INFO L226 Difference]: Without dead ends: 19 [2023-03-31 22:58:09,423 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=101, Invalid=361, Unknown=0, NotChecked=0, Total=462 [2023-03-31 22:58:09,424 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 12 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-31 22:58:09,424 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 38 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 22:58:09,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2023-03-31 22:58:09,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2023-03-31 22:58:09,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 states have internal predecessors, (15), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 22:58:09,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2023-03-31 22:58:09,427 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 12 [2023-03-31 22:58:09,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:58:09,427 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2023-03-31 22:58:09,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 22:58:09,428 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2023-03-31 22:58:09,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-03-31 22:58:09,429 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:58:09,429 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:58:09,449 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-03-31 22:58:09,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:58:09,636 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:58:09,636 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:58:09,637 INFO L85 PathProgramCache]: Analyzing trace with hash -1930929813, now seen corresponding path program 2 times [2023-03-31 22:58:09,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:58:09,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287293459] [2023-03-31 22:58:09,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:58:09,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:58:09,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:58:09,837 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:58:09,837 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:58:09,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287293459] [2023-03-31 22:58:09,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287293459] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 22:58:09,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729422635] [2023-03-31 22:58:09,838 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-03-31 22:58:09,838 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:58:09,838 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:58:09,839 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 22:58:09,841 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-03-31 22:58:09,912 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-03-31 22:58:09,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 22:58:09,913 INFO L262 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 7 conjunts are in the unsatisfiable core [2023-03-31 22:58:09,914 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 22:58:09,964 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:58:09,964 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 22:58:10,010 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:58:10,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1729422635] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 22:58:10,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1125345530] [2023-03-31 22:58:10,012 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2023-03-31 22:58:10,012 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 22:58:10,012 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 22:58:10,013 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 22:58:10,013 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 22:58:10,088 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 35 for LOIs [2023-03-31 22:58:10,137 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 25 for LOIs [2023-03-31 22:58:10,144 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 28 for LOIs [2023-03-31 22:58:10,158 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 22:58:10,427 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '462#(and (= |~#b~0.offset| 0) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |~#x~0.offset| 0) (= |~#b~0.base| 5) (= |~#x~0.base| 6) (= |#NULL.offset| 0) (= |~#a~0.offset| 0) (= |~#a~0.base| 4) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2023-03-31 22:58:10,427 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 22:58:10,427 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 22:58:10,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2023-03-31 22:58:10,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916544932] [2023-03-31 22:58:10,427 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 22:58:10,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-03-31 22:58:10,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:58:10,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-03-31 22:58:10,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=627, Unknown=0, NotChecked=0, Total=812 [2023-03-31 22:58:10,429 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand has 20 states, 20 states have (on average 1.25) internal successors, (25), 20 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 22:58:10,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:58:10,470 INFO L93 Difference]: Finished difference Result 35 states and 39 transitions. [2023-03-31 22:58:10,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-03-31 22:58:10,470 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.25) internal successors, (25), 20 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2023-03-31 22:58:10,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:58:10,471 INFO L225 Difference]: With dead ends: 35 [2023-03-31 22:58:10,471 INFO L226 Difference]: Without dead ends: 21 [2023-03-31 22:58:10,471 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=196, Invalid=674, Unknown=0, NotChecked=0, Total=870 [2023-03-31 22:58:10,472 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 10 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-31 22:58:10,472 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 56 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 22:58:10,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-03-31 22:58:10,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2023-03-31 22:58:10,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 15 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 22:58:10,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2023-03-31 22:58:10,475 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 15 [2023-03-31 22:58:10,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:58:10,475 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2023-03-31 22:58:10,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.25) internal successors, (25), 20 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 22:58:10,475 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2023-03-31 22:58:10,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-03-31 22:58:10,476 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:58:10,476 INFO L195 NwaCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:58:10,492 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-03-31 22:58:10,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-03-31 22:58:10,681 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:58:10,681 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:58:10,681 INFO L85 PathProgramCache]: Analyzing trace with hash 208704523, now seen corresponding path program 3 times [2023-03-31 22:58:10,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:58:10,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979632016] [2023-03-31 22:58:10,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:58:10,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:58:10,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-03-31 22:58:10,705 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-03-31 22:58:10,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-03-31 22:58:10,733 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2023-03-31 22:58:10,734 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-03-31 22:58:10,734 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-03-31 22:58:10,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-03-31 22:58:10,738 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1] [2023-03-31 22:58:10,741 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-03-31 22:58:10,758 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.03 10:58:10 BoogieIcfgContainer [2023-03-31 22:58:10,758 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-03-31 22:58:10,758 INFO L158 Benchmark]: Toolchain (without parser) took 3588.52ms. Allocated memory is still 272.6MB. Free memory was 232.2MB in the beginning and 116.4MB in the end (delta: 115.9MB). Peak memory consumption was 117.1MB. Max. memory is 8.0GB. [2023-03-31 22:58:10,758 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 226.5MB. Free memory was 175.8MB in the beginning and 175.6MB in the end (delta: 138.5kB). There was no memory consumed. Max. memory is 8.0GB. [2023-03-31 22:58:10,759 INFO L158 Benchmark]: CACSL2BoogieTranslator took 255.19ms. Allocated memory is still 272.6MB. Free memory was 231.9MB in the beginning and 219.6MB in the end (delta: 12.3MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. [2023-03-31 22:58:10,759 INFO L158 Benchmark]: Boogie Preprocessor took 44.96ms. Allocated memory is still 272.6MB. Free memory was 219.6MB in the beginning and 217.2MB in the end (delta: 2.4MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-03-31 22:58:10,759 INFO L158 Benchmark]: RCFGBuilder took 552.22ms. Allocated memory is still 272.6MB. Free memory was 217.2MB in the beginning and 193.1MB in the end (delta: 24.1MB). Peak memory consumption was 24.1MB. Max. memory is 8.0GB. [2023-03-31 22:58:10,759 INFO L158 Benchmark]: TraceAbstraction took 2732.17ms. Allocated memory is still 272.6MB. Free memory was 192.4MB in the beginning and 116.4MB in the end (delta: 76.0MB). Peak memory consumption was 77.3MB. Max. memory is 8.0GB. [2023-03-31 22:58:10,760 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 226.5MB. Free memory was 175.8MB in the beginning and 175.6MB in the end (delta: 138.5kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 255.19ms. Allocated memory is still 272.6MB. Free memory was 231.9MB in the beginning and 219.6MB in the end (delta: 12.3MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. * Boogie Preprocessor took 44.96ms. Allocated memory is still 272.6MB. Free memory was 219.6MB in the beginning and 217.2MB in the end (delta: 2.4MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 552.22ms. Allocated memory is still 272.6MB. Free memory was 217.2MB in the beginning and 193.1MB in the end (delta: 24.1MB). Peak memory consumption was 24.1MB. Max. memory is 8.0GB. * TraceAbstraction took 2732.17ms. Allocated memory is still 272.6MB. Free memory was 192.4MB in the beginning and 116.4MB in the end (delta: 76.0MB). Peak memory consumption was 77.3MB. 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 - UnprovableResult [Line: 7]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of to_real at line 98, overapproximation of someBinaryArithmeticDOUBLEoperation at line 99. Possible FailurePath: [L71] double a[50][50], b[50], x[50]; [L88] int i, j, nmax = 50, n = 5, chkerr; [L89] double eps, w; [L91] eps = 1.0e-6 [L93] i = 0 VAL [a={4:0}, b={5:0}, eps=1/1000000, i=0, n=5, nmax=50, x={6:0}] [L93] COND TRUE i <= n [L95] w = 0.0 [L96] j = 0 VAL [a={4:0}, b={5:0}, eps=1/1000000, i=0, j=0, n=5, nmax=50, w=0, x={6:0}] [L96] COND TRUE j <= n [L98] a[i][j] = (i + 1) + (j + 1) [L99] COND TRUE i == j [L99] EXPR a[i][j] [L99] a[i][j] *= 10.0 [L100] EXPR a[i][j] [L100] w += a[i][j] [L96] j++ VAL [a={4:0}, a[i][j]=20020, b={5:0}, eps=1/1000000, i=0, j=1, n=5, nmax=50, x={6:0}] [L96] COND TRUE j <= n [L98] a[i][j] = (i + 1) + (j + 1) [L99] COND FALSE !(i == j) [L100] EXPR a[i][j] [L100] w += a[i][j] [L96] j++ VAL [a={4:0}, a[i][j]=20020, b={5:0}, eps=1/1000000, i=0, j=2, n=5, nmax=50, x={6:0}] [L96] COND TRUE j <= n [L98] a[i][j] = (i + 1) + (j + 1) [L99] COND FALSE !(i == j) [L100] EXPR a[i][j] [L100] w += a[i][j] [L96] j++ VAL [a={4:0}, a[i][j]=20020, b={5:0}, eps=1/1000000, i=0, j=3, n=5, nmax=50, x={6:0}] [L96] COND TRUE j <= n [L98] a[i][j] = (i + 1) + (j + 1) [L99] COND FALSE !(i == j) [L100] EXPR a[i][j] [L100] w += a[i][j] [L96] j++ VAL [a={4:0}, a[i][j]=20020, b={5:0}, eps=1/1000000, i=0, j=4, n=5, nmax=50, x={6:0}] [L96] COND TRUE j <= n [L98] a[i][j] = (i + 1) + (j + 1) [L99] COND FALSE !(i == j) [L100] EXPR a[i][j] [L100] w += a[i][j] [L96] j++ VAL [a={4:0}, a[i][j]=20020, b={5:0}, eps=1/1000000, i=0, j=5, n=5, nmax=50, x={6:0}] [L96] COND TRUE j <= n [L98] a[i][j] = (i + 1) + (j + 1) [L99] COND FALSE !(i == j) [L100] EXPR a[i][j] [L100] w += a[i][j] [L96] j++ VAL [a={4:0}, a[i][j]=20020, b={5:0}, eps=1/1000000, i=0, j=6, n=5, nmax=50, x={6:0}] [L96] COND FALSE !(j <= n) VAL [a={4:0}, a[i][j]=20020, b={5:0}, eps=1/1000000, i=0, j=6, n=5, nmax=50, x={6:0}] [L102] CALL __VERIFIER_assert(i==2) VAL [\old(cond)=0, a={4:0}, b={5:0}, x={6:0}] [L6] COND TRUE !(cond) VAL [\old(cond)=0, a={4:0}, b={5:0}, cond=0, x={6:0}] [L7] reach_error() VAL [\old(cond)=0, a={4:0}, b={5:0}, cond=0, x={6:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 7 procedures, 41 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 2.7s, OverallIterations: 4, TraceHistogramMax: 6, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 32 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 28 mSDsluCounter, 150 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 98 mSDsCounter, 3 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 112 IncrementalHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 3 mSolverCounterUnsat, 52 mSDtfsCounter, 112 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 99 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 559 ImplicationChecksByTransitivity, 0.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=39occurred in iteration=0, InterpolantAutomatonStates: 20, 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, 3 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 82 NumberOfCodeBlocks, 82 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 85 ConstructedInterpolants, 0 QuantifiedInterpolants, 209 SizeOfPredicates, 4 NumberOfNonLiveVariables, 327 ConjunctsInSsa, 11 ConjunctsInUnsatCore, 7 InterpolantComputations, 1 PerfectInterpolantSequences, 0/33 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 [2023-03-31 22:58:10,783 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...