MAYBE Ultimate: Cannot open display: This is Ultimate 0.1.24-8dc7c08-m [2020-06-22 08:12:10,883 INFO L170 SettingsManager]: Resetting all preferences to default values... [2020-06-22 08:12:10,885 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2020-06-22 08:12:10,897 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-06-22 08:12:10,897 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-06-22 08:12:10,898 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-06-22 08:12:10,899 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-06-22 08:12:10,901 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2020-06-22 08:12:10,902 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-06-22 08:12:10,903 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-06-22 08:12:10,904 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-06-22 08:12:10,904 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-06-22 08:12:10,905 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-06-22 08:12:10,906 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-06-22 08:12:10,907 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-06-22 08:12:10,908 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-06-22 08:12:10,908 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-06-22 08:12:10,910 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-06-22 08:12:10,912 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2020-06-22 08:12:10,913 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-06-22 08:12:10,914 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-06-22 08:12:10,915 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-06-22 08:12:10,918 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-06-22 08:12:10,918 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-06-22 08:12:10,918 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-06-22 08:12:10,919 INFO L174 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-06-22 08:12:10,919 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-06-22 08:12:10,920 INFO L177 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-06-22 08:12:10,920 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-06-22 08:12:10,921 INFO L174 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-06-22 08:12:10,922 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-06-22 08:12:10,922 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2020-06-22 08:12:10,923 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-06-22 08:12:10,923 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2020-06-22 08:12:10,924 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-06-22 08:12:10,924 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-06-22 08:12:10,924 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2020-06-22 08:12:10,925 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2020-06-22 08:12:10,926 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2020-06-22 08:12:10,926 INFO L98 SettingsManager]: Beginning loading settings from /export/starexec/sandbox/solver/bin/./../termcomp2017.epf [2020-06-22 08:12:10,941 INFO L110 SettingsManager]: Loading preferences was successful [2020-06-22 08:12:10,942 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2020-06-22 08:12:10,943 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-06-22 08:12:10,943 INFO L133 SettingsManager]: * Rewrite not-equals=true [2020-06-22 08:12:10,943 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2020-06-22 08:12:10,943 INFO L133 SettingsManager]: * Minimize states using LBE with the strategy=SINGLE [2020-06-22 08:12:10,943 INFO L133 SettingsManager]: * Use SBE=true [2020-06-22 08:12:10,944 INFO L131 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2020-06-22 08:12:10,944 INFO L133 SettingsManager]: * Use old map elimination=false [2020-06-22 08:12:10,944 INFO L133 SettingsManager]: * Use external solver (rank synthesis)=false [2020-06-22 08:12:10,944 INFO L133 SettingsManager]: * Buchi interpolant automaton construction strategy=DANDELION [2020-06-22 08:12:10,944 INFO L133 SettingsManager]: * Use only trivial implications for array writes=true [2020-06-22 08:12:10,944 INFO L133 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2020-06-22 08:12:10,945 INFO L133 SettingsManager]: * Construct termination proof for TermComp=true [2020-06-22 08:12:10,945 INFO L133 SettingsManager]: * Command for external solver (GNTA synthesis)=z3 SMTLIB2_COMPLIANT=true -memory:4560 -smt2 -in -t:12000 [2020-06-22 08:12:10,945 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-06-22 08:12:10,945 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-06-22 08:12:10,945 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2020-06-22 08:12:10,945 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2020-06-22 08:12:10,945 INFO L133 SettingsManager]: * Assume nondeterminstic values are in range=false [2020-06-22 08:12:10,946 INFO L133 SettingsManager]: * How to treat unsigned ints differently from normal ones=IGNORE [2020-06-22 08:12:10,946 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-06-22 08:12:10,946 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-06-22 08:12:10,946 INFO L133 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2020-06-22 08:12:10,946 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:4560 -smt2 -in -t:5000 [2020-06-22 08:12:10,946 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-06-22 08:12:10,947 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-06-22 08:12:10,947 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2020-06-22 08:12:10,947 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-06-22 08:12:10,973 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-06-22 08:12:10,986 INFO L259 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-06-22 08:12:10,990 INFO L215 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-06-22 08:12:10,991 INFO L271 PluginConnector]: Initializing CDTParser... [2020-06-22 08:12:10,991 INFO L276 PluginConnector]: CDTParser initialized [2020-06-22 08:12:10,992 INFO L430 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /export/starexec/sandbox/benchmark/theBenchmark.c [2020-06-22 08:12:11,136 INFO L221 CDTParser]: Created temporary CDT project at /export/starexec/sandbox/tmp/2078a493fe8b4139b8e17a890ec30ad1/FLAGb390bf9d7 [2020-06-22 08:12:11,485 INFO L307 CDTParser]: Found 1 translation units. [2020-06-22 08:12:11,485 INFO L161 CDTParser]: Scanning /export/starexec/sandbox/benchmark/theBenchmark.c [2020-06-22 08:12:11,486 WARN L117 ultiparseSymbolTable]: System include stdlib.h could not be resolved by CDT -- only built-in system includes are available. [2020-06-22 08:12:11,492 INFO L355 CDTParser]: About to delete temporary CDT project at /export/starexec/sandbox/tmp/2078a493fe8b4139b8e17a890ec30ad1/FLAGb390bf9d7 [2020-06-22 08:12:11,900 INFO L363 CDTParser]: Successfully deleted /export/starexec/sandbox/tmp/2078a493fe8b4139b8e17a890ec30ad1 [2020-06-22 08:12:11,913 INFO L297 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-06-22 08:12:11,915 INFO L131 ToolchainWalker]: Walking toolchain with 7 elements. [2020-06-22 08:12:11,916 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-06-22 08:12:11,916 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-06-22 08:12:11,920 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2020-06-22 08:12:11,921 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.06 08:12:11" (1/1) ... [2020-06-22 08:12:11,924 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@574de582 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.06 08:12:11, skipping insertion in model container [2020-06-22 08:12:11,925 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.06 08:12:11" (1/1) ... [2020-06-22 08:12:11,933 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-06-22 08:12:11,951 INFO L176 MainTranslator]: Built tables and reachable declarations [2020-06-22 08:12:12,123 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-06-22 08:12:12,137 INFO L191 MainTranslator]: Completed pre-run [2020-06-22 08:12:12,217 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-06-22 08:12:12,234 INFO L195 MainTranslator]: Completed translation [2020-06-22 08:12:12,235 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.06 08:12:12 WrapperNode [2020-06-22 08:12:12,235 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-06-22 08:12:12,236 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-06-22 08:12:12,236 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-06-22 08:12:12,237 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2020-06-22 08:12:12,246 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.06 08:12:12" (1/1) ... [2020-06-22 08:12:12,255 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.06 08:12:12" (1/1) ... [2020-06-22 08:12:12,277 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-06-22 08:12:12,277 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-06-22 08:12:12,277 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-06-22 08:12:12,278 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2020-06-22 08:12:12,287 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.06 08:12:12" (1/1) ... [2020-06-22 08:12:12,288 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.06 08:12:12" (1/1) ... [2020-06-22 08:12:12,289 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.06 08:12:12" (1/1) ... [2020-06-22 08:12:12,289 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.06 08:12:12" (1/1) ... [2020-06-22 08:12:12,295 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.06 08:12:12" (1/1) ... [2020-06-22 08:12:12,300 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.06 08:12:12" (1/1) ... [2020-06-22 08:12:12,302 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.06 08:12:12" (1/1) ... [2020-06-22 08:12:12,303 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-06-22 08:12:12,304 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-06-22 08:12:12,304 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-06-22 08:12:12,304 INFO L276 PluginConnector]: RCFGBuilder initialized [2020-06-22 08:12:12,305 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.06 08:12:12" (1/1) ... No working directory specified, using /export/starexec/sandbox/solver/bin/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:4560 -smt2 -in -t:5000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:4560 -smt2 -in -t:5000 [2020-06-22 08:12:12,385 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-06-22 08:12:12,386 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-06-22 08:12:12,386 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-06-22 08:12:12,386 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-06-22 08:12:12,386 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-06-22 08:12:12,386 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-06-22 08:12:12,634 INFO L281 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-06-22 08:12:12,634 INFO L286 CfgBuilder]: Removed 7 assue(true) statements. [2020-06-22 08:12:12,636 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 08:12:12 BoogieIcfgContainer [2020-06-22 08:12:12,636 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-06-22 08:12:12,637 INFO L113 PluginConnector]: ------------------------BlockEncodingV2---------------------------- [2020-06-22 08:12:12,637 INFO L271 PluginConnector]: Initializing BlockEncodingV2... [2020-06-22 08:12:12,639 INFO L276 PluginConnector]: BlockEncodingV2 initialized [2020-06-22 08:12:12,640 INFO L185 PluginConnector]: Executing the observer BlockEncodingObserver from plugin BlockEncodingV2 for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 08:12:12" (1/1) ... [2020-06-22 08:12:12,657 INFO L313 BlockEncoder]: Initial Icfg 30 locations, 38 edges [2020-06-22 08:12:12,659 INFO L258 BlockEncoder]: Using Remove infeasible edges [2020-06-22 08:12:12,660 INFO L263 BlockEncoder]: Using Maximize final states [2020-06-22 08:12:12,661 INFO L270 BlockEncoder]: Using Minimize states even if more edges are added than removed.=false [2020-06-22 08:12:12,661 INFO L276 BlockEncoder]: Using Minimize states using LBE with the strategy=SINGLE [2020-06-22 08:12:12,663 INFO L296 BlockEncoder]: Using Remove sink states [2020-06-22 08:12:12,664 INFO L171 BlockEncoder]: Using Apply optimizations until nothing changes=true [2020-06-22 08:12:12,664 INFO L179 BlockEncoder]: Using Rewrite not-equals [2020-06-22 08:12:12,687 INFO L185 BlockEncoder]: Using Use SBE [2020-06-22 08:12:12,711 INFO L200 BlockEncoder]: SBE split 10 edges [2020-06-22 08:12:12,717 INFO L70 emoveInfeasibleEdges]: Removed 3 edges and 0 locations because of local infeasibility [2020-06-22 08:12:12,719 INFO L71 MaximizeFinalStates]: 0 new accepting states [2020-06-22 08:12:12,751 INFO L100 BaseMinimizeStates]: Removed 16 edges and 8 locations by large block encoding [2020-06-22 08:12:12,754 INFO L70 RemoveSinkStates]: Removed 3 edges and 2 locations by removing sink states [2020-06-22 08:12:12,756 INFO L70 emoveInfeasibleEdges]: Removed 0 edges and 0 locations because of local infeasibility [2020-06-22 08:12:12,756 INFO L71 MaximizeFinalStates]: 0 new accepting states [2020-06-22 08:12:12,757 INFO L100 BaseMinimizeStates]: Removed 0 edges and 0 locations by large block encoding [2020-06-22 08:12:12,757 INFO L70 RemoveSinkStates]: Removed 0 edges and 0 locations by removing sink states [2020-06-22 08:12:12,758 INFO L313 BlockEncoder]: Encoded RCFG 20 locations, 36 edges [2020-06-22 08:12:12,758 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.blockencoding CFG 22.06 08:12:12 BasicIcfg [2020-06-22 08:12:12,758 INFO L132 PluginConnector]: ------------------------ END BlockEncodingV2---------------------------- [2020-06-22 08:12:12,759 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-06-22 08:12:12,759 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-06-22 08:12:12,763 INFO L276 PluginConnector]: TraceAbstraction initialized [2020-06-22 08:12:12,763 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.06 08:12:11" (1/4) ... [2020-06-22 08:12:12,764 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65671647 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.06 08:12:12, skipping insertion in model container [2020-06-22 08:12:12,764 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.06 08:12:12" (2/4) ... [2020-06-22 08:12:12,765 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65671647 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.06 08:12:12, skipping insertion in model container [2020-06-22 08:12:12,765 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 08:12:12" (3/4) ... [2020-06-22 08:12:12,765 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65671647 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.06 08:12:12, skipping insertion in model container [2020-06-22 08:12:12,765 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.blockencoding CFG 22.06 08:12:12" (4/4) ... [2020-06-22 08:12:12,767 INFO L112 eAbstractionObserver]: Analyzing ICFG theBenchmark.c_BEv2 [2020-06-22 08:12:12,777 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2020-06-22 08:12:12,785 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 8 error locations. [2020-06-22 08:12:12,801 INFO L257 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2020-06-22 08:12:12,831 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2020-06-22 08:12:12,832 INFO L382 AbstractCegarLoop]: Interprodecural is true [2020-06-22 08:12:12,832 INFO L383 AbstractCegarLoop]: Hoare is true [2020-06-22 08:12:12,832 INFO L384 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2020-06-22 08:12:12,832 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-06-22 08:12:12,832 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-06-22 08:12:12,832 INFO L387 AbstractCegarLoop]: Difference is false [2020-06-22 08:12:12,833 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-06-22 08:12:12,833 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-06-22 08:12:12,849 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-06-22 08:12:12,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-06-22 08:12:12,855 INFO L394 BasicCegarLoop]: Found error trace [2020-06-22 08:12:12,856 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-06-22 08:12:12,856 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION]=== [2020-06-22 08:12:12,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-06-22 08:12:12,862 INFO L82 PathProgramCache]: Analyzing trace with hash -1674118285, now seen corresponding path program 1 times [2020-06-22 08:12:12,864 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2020-06-22 08:12:12,864 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2020-06-22 08:12:12,917 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2020-06-22 08:12:12,917 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-06-22 08:12:12,918 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2020-06-22 08:12:12,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-06-22 08:12:13,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-06-22 08:12:13,021 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-06-22 08:12:13,021 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-06-22 08:12:13,025 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-06-22 08:12:13,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-06-22 08:12:13,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-06-22 08:12:13,042 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 3 states. [2020-06-22 08:12:13,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-06-22 08:12:13,216 INFO L93 Difference]: Finished difference Result 53 states and 94 transitions. [2020-06-22 08:12:13,217 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-06-22 08:12:13,219 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2020-06-22 08:12:13,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-06-22 08:12:13,235 INFO L225 Difference]: With dead ends: 53 [2020-06-22 08:12:13,235 INFO L226 Difference]: Without dead ends: 37 [2020-06-22 08:12:13,239 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-06-22 08:12:13,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-06-22 08:12:13,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 21. [2020-06-22 08:12:13,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-06-22 08:12:13,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 39 transitions. [2020-06-22 08:12:13,280 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 39 transitions. Word has length 7 [2020-06-22 08:12:13,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-06-22 08:12:13,281 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 39 transitions. [2020-06-22 08:12:13,281 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-06-22 08:12:13,281 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 39 transitions. [2020-06-22 08:12:13,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-06-22 08:12:13,282 INFO L394 BasicCegarLoop]: Found error trace [2020-06-22 08:12:13,282 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-06-22 08:12:13,282 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION]=== [2020-06-22 08:12:13,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-06-22 08:12:13,283 INFO L82 PathProgramCache]: Analyzing trace with hash -1674088494, now seen corresponding path program 1 times [2020-06-22 08:12:13,283 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2020-06-22 08:12:13,283 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2020-06-22 08:12:13,284 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2020-06-22 08:12:13,284 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-06-22 08:12:13,284 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2020-06-22 08:12:13,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-06-22 08:12:13,321 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-06-22 08:12:13,321 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-06-22 08:12:13,321 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-06-22 08:12:13,323 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-06-22 08:12:13,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-06-22 08:12:13,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-06-22 08:12:13,324 INFO L87 Difference]: Start difference. First operand 21 states and 39 transitions. Second operand 3 states. [2020-06-22 08:12:13,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-06-22 08:12:13,383 INFO L93 Difference]: Finished difference Result 21 states and 39 transitions. [2020-06-22 08:12:13,384 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-06-22 08:12:13,384 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2020-06-22 08:12:13,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-06-22 08:12:13,385 INFO L225 Difference]: With dead ends: 21 [2020-06-22 08:12:13,385 INFO L226 Difference]: Without dead ends: 17 [2020-06-22 08:12:13,386 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-06-22 08:12:13,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-06-22 08:12:13,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-06-22 08:12:13,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-06-22 08:12:13,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 31 transitions. [2020-06-22 08:12:13,390 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 31 transitions. Word has length 7 [2020-06-22 08:12:13,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-06-22 08:12:13,390 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 31 transitions. [2020-06-22 08:12:13,391 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-06-22 08:12:13,391 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 31 transitions. [2020-06-22 08:12:13,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-06-22 08:12:13,391 INFO L394 BasicCegarLoop]: Found error trace [2020-06-22 08:12:13,391 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-06-22 08:12:13,392 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION]=== [2020-06-22 08:12:13,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-06-22 08:12:13,392 INFO L82 PathProgramCache]: Analyzing trace with hash -1674088492, now seen corresponding path program 1 times [2020-06-22 08:12:13,392 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2020-06-22 08:12:13,392 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2020-06-22 08:12:13,393 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2020-06-22 08:12:13,394 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-06-22 08:12:13,394 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2020-06-22 08:12:13,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-06-22 08:12:13,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-06-22 08:12:13,431 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-06-22 08:12:13,431 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-06-22 08:12:13,432 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-06-22 08:12:13,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-06-22 08:12:13,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-06-22 08:12:13,432 INFO L87 Difference]: Start difference. First operand 17 states and 31 transitions. Second operand 4 states. [2020-06-22 08:12:13,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-06-22 08:12:13,505 INFO L93 Difference]: Finished difference Result 41 states and 69 transitions. [2020-06-22 08:12:13,505 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-06-22 08:12:13,506 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2020-06-22 08:12:13,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-06-22 08:12:13,507 INFO L225 Difference]: With dead ends: 41 [2020-06-22 08:12:13,507 INFO L226 Difference]: Without dead ends: 29 [2020-06-22 08:12:13,507 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-06-22 08:12:13,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-06-22 08:12:13,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 20. [2020-06-22 08:12:13,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-06-22 08:12:13,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 33 transitions. [2020-06-22 08:12:13,512 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 33 transitions. Word has length 7 [2020-06-22 08:12:13,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-06-22 08:12:13,513 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 33 transitions. [2020-06-22 08:12:13,513 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-06-22 08:12:13,513 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 33 transitions. [2020-06-22 08:12:13,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-06-22 08:12:13,513 INFO L394 BasicCegarLoop]: Found error trace [2020-06-22 08:12:13,513 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-06-22 08:12:13,514 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION]=== [2020-06-22 08:12:13,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-06-22 08:12:13,514 INFO L82 PathProgramCache]: Analyzing trace with hash -1674088491, now seen corresponding path program 1 times [2020-06-22 08:12:13,514 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2020-06-22 08:12:13,514 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2020-06-22 08:12:13,515 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2020-06-22 08:12:13,516 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-06-22 08:12:13,516 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2020-06-22 08:12:13,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-06-22 08:12:13,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-06-22 08:12:13,562 INFO L469 BasicCegarLoop]: Counterexample might be feasible [2020-06-22 08:12:13,586 INFO L305 ceAbstractionStarter]: Did not count any witness invariants because Icfg is not BoogieIcfg [2020-06-22 08:12:13,589 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.06 08:12:13 BasicIcfg [2020-06-22 08:12:13,589 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-06-22 08:12:13,589 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2020-06-22 08:12:13,590 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2020-06-22 08:12:13,594 INFO L276 PluginConnector]: BuchiAutomizer initialized [2020-06-22 08:12:13,594 INFO L99 BuchiAutomizer]: Another Plugin discovered errors, I will not analyze termination [2020-06-22 08:12:13,594 INFO L99 BuchiAutomizer]: Another Plugin discovered errors, I will not analyze termination [2020-06-22 08:12:13,594 INFO L99 BuchiAutomizer]: Another Plugin discovered errors, I will not analyze termination [2020-06-22 08:12:13,594 INFO L99 BuchiAutomizer]: Another Plugin discovered errors, I will not analyze termination [2020-06-22 08:12:13,594 INFO L99 BuchiAutomizer]: Another Plugin discovered errors, I will not analyze termination [2020-06-22 08:12:13,595 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2020-06-22 08:12:13,595 INFO L168 Benchmark]: Toolchain (without parser) took 1681.98 ms. Allocated memory was 649.6 MB in the beginning and 683.1 MB in the end (delta: 33.6 MB). Free memory was 565.0 MB in the beginning and 546.7 MB in the end (delta: 18.2 MB). Peak memory consumption was 51.8 MB. Max. memory is 50.3 GB. [2020-06-22 08:12:13,597 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 649.6 MB. Free memory is still 585.7 MB. There was no memory consumed. Max. memory is 50.3 GB. [2020-06-22 08:12:13,598 INFO L168 Benchmark]: CACSL2BoogieTranslator took 319.63 ms. Allocated memory was 649.6 MB in the beginning and 683.1 MB in the end (delta: 33.6 MB). Free memory was 565.0 MB in the beginning and 648.0 MB in the end (delta: -83.1 MB). Peak memory consumption was 31.0 MB. Max. memory is 50.3 GB. [2020-06-22 08:12:13,599 INFO L168 Benchmark]: Boogie Procedure Inliner took 40.90 ms. Allocated memory is still 683.1 MB. Free memory was 648.0 MB in the beginning and 645.9 MB in the end (delta: 2.2 MB). Peak memory consumption was 2.2 MB. Max. memory is 50.3 GB. [2020-06-22 08:12:13,599 INFO L168 Benchmark]: Boogie Preprocessor took 26.21 ms. Allocated memory is still 683.1 MB. Free memory was 645.9 MB in the beginning and 644.8 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.1 MB. Max. memory is 50.3 GB. [2020-06-22 08:12:13,600 INFO L168 Benchmark]: RCFGBuilder took 332.32 ms. Allocated memory is still 683.1 MB. Free memory was 644.8 MB in the beginning and 623.6 MB in the end (delta: 21.2 MB). Peak memory consumption was 21.2 MB. Max. memory is 50.3 GB. [2020-06-22 08:12:13,600 INFO L168 Benchmark]: BlockEncodingV2 took 121.84 ms. Allocated memory is still 683.1 MB. Free memory was 623.6 MB in the beginning and 614.9 MB in the end (delta: 8.7 MB). Peak memory consumption was 8.7 MB. Max. memory is 50.3 GB. [2020-06-22 08:12:13,601 INFO L168 Benchmark]: TraceAbstraction took 829.72 ms. Allocated memory is still 683.1 MB. Free memory was 614.9 MB in the beginning and 546.7 MB in the end (delta: 68.2 MB). Peak memory consumption was 68.2 MB. Max. memory is 50.3 GB. [2020-06-22 08:12:13,602 INFO L168 Benchmark]: BuchiAutomizer took 5.18 ms. Allocated memory is still 683.1 MB. Free memory is still 546.7 MB. There was no memory consumed. Max. memory is 50.3 GB. [2020-06-22 08:12:13,606 INFO L337 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.plugins.blockencoding: - StatisticsResult: Initial Icfg 30 locations, 38 edges - StatisticsResult: Encoded RCFG 20 locations, 36 edges * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 ms. Allocated memory is still 649.6 MB. Free memory is still 585.7 MB. There was no memory consumed. Max. memory is 50.3 GB. * CACSL2BoogieTranslator took 319.63 ms. Allocated memory was 649.6 MB in the beginning and 683.1 MB in the end (delta: 33.6 MB). Free memory was 565.0 MB in the beginning and 648.0 MB in the end (delta: -83.1 MB). Peak memory consumption was 31.0 MB. Max. memory is 50.3 GB. * Boogie Procedure Inliner took 40.90 ms. Allocated memory is still 683.1 MB. Free memory was 648.0 MB in the beginning and 645.9 MB in the end (delta: 2.2 MB). Peak memory consumption was 2.2 MB. Max. memory is 50.3 GB. * Boogie Preprocessor took 26.21 ms. Allocated memory is still 683.1 MB. Free memory was 645.9 MB in the beginning and 644.8 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.1 MB. Max. memory is 50.3 GB. * RCFGBuilder took 332.32 ms. Allocated memory is still 683.1 MB. Free memory was 644.8 MB in the beginning and 623.6 MB in the end (delta: 21.2 MB). Peak memory consumption was 21.2 MB. Max. memory is 50.3 GB. * BlockEncodingV2 took 121.84 ms. Allocated memory is still 683.1 MB. Free memory was 623.6 MB in the beginning and 614.9 MB in the end (delta: 8.7 MB). Peak memory consumption was 8.7 MB. Max. memory is 50.3 GB. * TraceAbstraction took 829.72 ms. Allocated memory is still 683.1 MB. Free memory was 614.9 MB in the beginning and 546.7 MB in the end (delta: 68.2 MB). Peak memory consumption was 68.2 MB. Max. memory is 50.3 GB. * BuchiAutomizer took 5.18 ms. Allocated memory is still 683.1 MB. Free memory is still 546.7 MB. There was no memory consumed. Max. memory is 50.3 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 16]: pointer dereference may fail pointer dereference may fail We found a FailurePath: [L5] int i, j; [L6] int val; [L7] int length = __VERIFIER_nondet_int(); [L8] COND FALSE !(length < 1) [L9] int *arr = alloca(length); [L10] COND FALSE !(!arr) [L11] i=0 [L11] COND TRUE i