java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data --generate-csv --csv-dir csv -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/ai/taipanbench/svcomp-Reach-64bit-ToothlessTaipan_CON-OldIcfg.epf -i ../../../trunk/examples/svcomp/loops/invert_string_true-unreach-call_true-termination.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-69f5bdd-m [2018-09-19 06:50:49,797 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-19 06:50:49,799 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-19 06:50:49,816 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-19 06:50:49,817 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-19 06:50:49,818 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-19 06:50:49,820 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-19 06:50:49,823 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-19 06:50:49,826 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-19 06:50:49,834 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-19 06:50:49,837 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-09-19 06:50:49,837 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-09-19 06:50:49,838 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-09-19 06:50:49,841 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-09-19 06:50:49,842 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-09-19 06:50:49,843 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-09-19 06:50:49,844 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-09-19 06:50:49,847 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-09-19 06:50:49,852 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-09-19 06:50:49,853 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-09-19 06:50:49,854 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-09-19 06:50:49,855 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-09-19 06:50:49,857 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-09-19 06:50:49,857 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-09-19 06:50:49,858 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-09-19 06:50:49,859 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-09-19 06:50:49,860 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-09-19 06:50:49,860 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-09-19 06:50:49,861 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-09-19 06:50:49,862 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-09-19 06:50:49,863 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-09-19 06:50:49,863 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-09-19 06:50:49,864 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-09-19 06:50:49,864 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-09-19 06:50:49,865 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-09-19 06:50:49,865 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-09-19 06:50:49,866 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/taipanbench/svcomp-Reach-64bit-ToothlessTaipan_CON-OldIcfg.epf [2018-09-19 06:50:49,881 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-19 06:50:49,881 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-19 06:50:49,882 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-19 06:50:49,882 INFO L133 SettingsManager]: * User list type=DISABLED [2018-09-19 06:50:49,882 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-09-19 06:50:49,883 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-09-19 06:50:49,883 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-09-19 06:50:49,883 INFO L133 SettingsManager]: * Octagon Domain=false [2018-09-19 06:50:49,883 INFO L133 SettingsManager]: * Abstract domain=CongruenceDomain [2018-09-19 06:50:49,883 INFO L133 SettingsManager]: * Log string format=TERM [2018-09-19 06:50:49,884 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-09-19 06:50:49,884 INFO L133 SettingsManager]: * Parallel states before merging=1 [2018-09-19 06:50:49,884 INFO L133 SettingsManager]: * Interval Domain=false [2018-09-19 06:50:49,885 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-19 06:50:49,885 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-19 06:50:49,885 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-19 06:50:49,885 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-19 06:50:49,885 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-19 06:50:49,886 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-19 06:50:49,886 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-19 06:50:49,886 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-19 06:50:49,886 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-19 06:50:49,886 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-19 06:50:49,887 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-19 06:50:49,887 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-19 06:50:49,887 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-19 06:50:49,887 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-19 06:50:49,887 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-19 06:50:49,888 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-19 06:50:49,888 INFO L133 SettingsManager]: * Trace refinement strategy=TOOTHLESS_TAIPAN [2018-09-19 06:50:49,888 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-19 06:50:49,888 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-19 06:50:49,888 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-19 06:50:49,889 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-09-19 06:50:49,889 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-09-19 06:50:49,936 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-19 06:50:49,949 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-19 06:50:49,953 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-19 06:50:49,954 INFO L271 PluginConnector]: Initializing CDTParser... [2018-09-19 06:50:49,955 INFO L276 PluginConnector]: CDTParser initialized [2018-09-19 06:50:49,956 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/invert_string_true-unreach-call_true-termination.i [2018-09-19 06:50:50,328 INFO L221 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/40bfb56af/91826422bf2a44b192cfbd89606316e8/FLAG336107bba [2018-09-19 06:50:50,501 INFO L277 CDTParser]: Found 1 translation units. [2018-09-19 06:50:50,501 INFO L159 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/invert_string_true-unreach-call_true-termination.i [2018-09-19 06:50:50,507 INFO L325 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/40bfb56af/91826422bf2a44b192cfbd89606316e8/FLAG336107bba [2018-09-19 06:50:50,526 INFO L333 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/40bfb56af/91826422bf2a44b192cfbd89606316e8 [2018-09-19 06:50:50,537 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-19 06:50:50,540 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-09-19 06:50:50,542 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-09-19 06:50:50,542 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-09-19 06:50:50,549 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-09-19 06:50:50,550 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.09 06:50:50" (1/1) ... [2018-09-19 06:50:50,553 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1119bd7f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.09 06:50:50, skipping insertion in model container [2018-09-19 06:50:50,553 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.09 06:50:50" (1/1) ... [2018-09-19 06:50:50,565 INFO L160 ieTranslatorObserver]: Starting translation in SV-COMP mode [2018-09-19 06:50:50,761 INFO L170 PostProcessor]: Settings: Checked method=main [2018-09-19 06:50:50,781 INFO L424 MainDispatcher]: Starting main dispatcher in SV-COMP mode [2018-09-19 06:50:50,789 INFO L170 PostProcessor]: Settings: Checked method=main [2018-09-19 06:50:50,804 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.09 06:50:50 WrapperNode [2018-09-19 06:50:50,804 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-09-19 06:50:50,805 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-19 06:50:50,805 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-19 06:50:50,805 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-19 06:50:50,816 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.09 06:50:50" (1/1) ... [2018-09-19 06:50:50,823 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.09 06:50:50" (1/1) ... [2018-09-19 06:50:50,830 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-19 06:50:50,831 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-19 06:50:50,831 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-19 06:50:50,831 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-19 06:50:50,842 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.09 06:50:50" (1/1) ... [2018-09-19 06:50:50,842 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.09 06:50:50" (1/1) ... [2018-09-19 06:50:50,844 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.09 06:50:50" (1/1) ... [2018-09-19 06:50:50,844 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.09 06:50:50" (1/1) ... [2018-09-19 06:50:50,846 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.09 06:50:50" (1/1) ... [2018-09-19 06:50:50,853 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.09 06:50:50" (1/1) ... [2018-09-19 06:50:50,854 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.09 06:50:50" (1/1) ... [2018-09-19 06:50:50,856 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-19 06:50:50,857 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-19 06:50:50,857 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-19 06:50:50,857 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-19 06:50:50,858 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.09 06:50:50" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-19 06:50:50,935 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-09-19 06:50:50,936 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-09-19 06:50:50,936 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-19 06:50:50,936 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-19 06:50:50,936 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-09-19 06:50:50,937 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-09-19 06:50:50,937 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-09-19 06:50:50,937 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-09-19 06:50:51,586 INFO L356 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-19 06:50:51,587 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.09 06:50:51 BoogieIcfgContainer [2018-09-19 06:50:51,587 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-19 06:50:51,588 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-19 06:50:51,588 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-19 06:50:51,591 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-19 06:50:51,592 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.09 06:50:50" (1/3) ... [2018-09-19 06:50:51,593 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d4b1388 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.09 06:50:51, skipping insertion in model container [2018-09-19 06:50:51,593 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.09 06:50:50" (2/3) ... [2018-09-19 06:50:51,593 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d4b1388 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.09 06:50:51, skipping insertion in model container [2018-09-19 06:50:51,594 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.09 06:50:51" (3/3) ... [2018-09-19 06:50:51,595 INFO L112 eAbstractionObserver]: Analyzing ICFG invert_string_true-unreach-call_true-termination.i [2018-09-19 06:50:51,606 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-19 06:50:51,615 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-19 06:50:51,662 INFO L130 ementStrategyFactory]: Using default assertion order modulation [2018-09-19 06:50:51,663 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-19 06:50:51,663 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-19 06:50:51,663 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-19 06:50:51,664 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-19 06:50:51,664 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-19 06:50:51,664 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-19 06:50:51,664 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-19 06:50:51,664 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-19 06:50:51,684 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2018-09-19 06:50:51,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-19 06:50:51,690 INFO L368 BasicCegarLoop]: Found error trace [2018-09-19 06:50:51,691 INFO L376 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-19 06:50:51,692 INFO L423 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-19 06:50:51,698 INFO L82 PathProgramCache]: Analyzing trace with hash 1728315421, now seen corresponding path program 1 times [2018-09-19 06:50:51,701 INFO L69 tionRefinementEngine]: Using refinement strategy ToothlessTaipanRefinementStrategy [2018-09-19 06:50:51,702 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 16 with the following transitions: [2018-09-19 06:50:51,704 INFO L202 CegarAbsIntRunner]: [0], [4], [17], [19], [32], [34], [38], [43], [52], [55], [57], [63], [64], [65], [67] [2018-09-19 06:50:51,732 INFO L148 AbstractInterpreter]: Using domain CongruenceDomain [2018-09-19 06:50:51,732 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CongruenceDomain (maxUnwinding=3, maxParallelStates=1) [2018-09-19 06:50:51,785 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-09-19 06:50:51,787 INFO L272 AbstractInterpreter]: Visited 6 different actions 6 times. Never merged. Never widened. Never found a fixpoint. Largest state had 5 variables. [2018-09-19 06:50:51,820 INFO L399 sIntCurrentIteration]: Generating AbsInt predicates [2018-09-19 06:50:51,866 INFO L232 lantSequenceWeakener]: Weakened 1 states. On average, predicates are now at 50% of their original sizes. [2018-09-19 06:50:51,866 INFO L412 sIntCurrentIteration]: Unifying AI predicates [2018-09-19 06:50:51,880 INFO L423 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-09-19 06:50:51,882 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-19 06:50:51,882 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-19 06:50:51,882 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-19 06:50:51,887 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-19 06:50:51,892 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-19 06:50:51,893 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-19 06:50:51,895 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 3 states. [2018-09-19 06:50:51,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-19 06:50:51,958 INFO L93 Difference]: Finished difference Result 48 states and 59 transitions. [2018-09-19 06:50:51,959 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-19 06:50:51,960 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2018-09-19 06:50:51,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-19 06:50:51,968 INFO L225 Difference]: With dead ends: 48 [2018-09-19 06:50:51,968 INFO L226 Difference]: Without dead ends: 24 [2018-09-19 06:50:51,972 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 14 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-19 06:50:51,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-09-19 06:50:52,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-09-19 06:50:52,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-19 06:50:52,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2018-09-19 06:50:52,009 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 15 [2018-09-19 06:50:52,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-19 06:50:52,010 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2018-09-19 06:50:52,010 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-19 06:50:52,010 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2018-09-19 06:50:52,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-19 06:50:52,011 INFO L368 BasicCegarLoop]: Found error trace [2018-09-19 06:50:52,012 INFO L376 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-19 06:50:52,012 INFO L423 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-19 06:50:52,012 INFO L82 PathProgramCache]: Analyzing trace with hash 374890024, now seen corresponding path program 1 times [2018-09-19 06:50:52,013 INFO L69 tionRefinementEngine]: Using refinement strategy ToothlessTaipanRefinementStrategy [2018-09-19 06:50:52,013 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 18 with the following transitions: [2018-09-19 06:50:52,013 INFO L202 CegarAbsIntRunner]: [0], [4], [8], [11], [19], [23], [26], [34], [38], [43], [52], [55], [57], [63], [64], [65], [67] [2018-09-19 06:50:52,014 INFO L148 AbstractInterpreter]: Using domain CongruenceDomain [2018-09-19 06:50:52,015 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CongruenceDomain (maxUnwinding=3, maxParallelStates=1) [2018-09-19 06:50:52,026 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-09-19 06:50:52,026 INFO L272 AbstractInterpreter]: Visited 7 different actions 7 times. Never merged. Never widened. Never found a fixpoint. Largest state had 5 variables. [2018-09-19 06:50:52,057 INFO L399 sIntCurrentIteration]: Generating AbsInt predicates [2018-09-19 06:50:52,067 INFO L224 lantSequenceWeakener]: Could never weaken! [2018-09-19 06:50:52,068 INFO L412 sIntCurrentIteration]: Unifying AI predicates [2018-09-19 06:50:52,076 INFO L423 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-09-19 06:50:52,076 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-19 06:50:52,076 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-19 06:50:52,076 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-19 06:50:52,077 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-19 06:50:52,077 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-19 06:50:52,079 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-19 06:50:52,079 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 3 states. [2018-09-19 06:50:52,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-19 06:50:52,151 INFO L93 Difference]: Finished difference Result 43 states and 47 transitions. [2018-09-19 06:50:52,151 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-19 06:50:52,151 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2018-09-19 06:50:52,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-19 06:50:52,155 INFO L225 Difference]: With dead ends: 43 [2018-09-19 06:50:52,156 INFO L226 Difference]: Without dead ends: 27 [2018-09-19 06:50:52,157 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-19 06:50:52,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-09-19 06:50:52,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2018-09-19 06:50:52,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-19 06:50:52,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2018-09-19 06:50:52,165 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 17 [2018-09-19 06:50:52,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-19 06:50:52,165 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2018-09-19 06:50:52,165 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-19 06:50:52,165 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2018-09-19 06:50:52,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-09-19 06:50:52,166 INFO L368 BasicCegarLoop]: Found error trace [2018-09-19 06:50:52,166 INFO L376 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-19 06:50:52,167 INFO L423 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-19 06:50:52,167 INFO L82 PathProgramCache]: Analyzing trace with hash 1641808688, now seen corresponding path program 1 times [2018-09-19 06:50:52,167 INFO L69 tionRefinementEngine]: Using refinement strategy ToothlessTaipanRefinementStrategy [2018-09-19 06:50:52,167 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 21 with the following transitions: [2018-09-19 06:50:52,168 INFO L202 CegarAbsIntRunner]: [0], [4], [8], [11], [13], [15], [19], [23], [26], [34], [38], [43], [52], [55], [57], [63], [64], [65], [67] [2018-09-19 06:50:52,169 INFO L148 AbstractInterpreter]: Using domain CongruenceDomain [2018-09-19 06:50:52,169 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CongruenceDomain (maxUnwinding=3, maxParallelStates=1) [2018-09-19 06:50:52,193 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-09-19 06:50:52,193 INFO L272 AbstractInterpreter]: Visited 19 different actions 23 times. Merged at 3 different actions 3 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 7 variables. [2018-09-19 06:50:52,200 INFO L443 BasicCegarLoop]: Counterexample might be feasible [2018-09-19 06:50:52,218 WARN L209 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2018-09-19 06:50:52,218 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.09 06:50:52 BoogieIcfgContainer [2018-09-19 06:50:52,218 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-19 06:50:52,219 INFO L168 Benchmark]: Toolchain (without parser) took 1681.64 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 715.1 MB). Free memory was 1.4 GB in the beginning and 2.1 GB in the end (delta: -723.0 MB). There was no memory consumed. Max. memory is 7.1 GB. [2018-09-19 06:50:52,222 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-19 06:50:52,223 INFO L168 Benchmark]: CACSL2BoogieTranslator took 262.93 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. [2018-09-19 06:50:52,224 INFO L168 Benchmark]: Boogie Procedure Inliner took 25.32 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-19 06:50:52,224 INFO L168 Benchmark]: Boogie Preprocessor took 25.77 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-19 06:50:52,225 INFO L168 Benchmark]: RCFGBuilder took 730.27 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 715.1 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -761.8 MB). Peak memory consumption was 26.8 MB. Max. memory is 7.1 GB. [2018-09-19 06:50:52,226 INFO L168 Benchmark]: TraceAbstraction took 630.67 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.1 GB in the end (delta: 28.2 MB). Peak memory consumption was 28.2 MB. Max. memory is 7.1 GB. [2018-09-19 06:50:52,231 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 262.93 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 25.32 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 25.77 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 730.27 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 715.1 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -761.8 MB). Peak memory consumption was 26.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 630.67 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.1 GB in the end (delta: 28.2 MB). Peak memory consumption was 28.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 5]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L12] unsigned int max = 5; [L13] char str1[max], str2[max]; [L14] int i, j; [L16] i=0 [L16] COND TRUE i= 0) [L29] j = max-1 [L30] i=0 [L30] COND TRUE i