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_Default-OldIcfg.epf -i ../../../trunk/examples/svcomp/loops/invert_string_true-unreach-call_true-termination.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-ddc4263 [2018-08-08 03:30:08,888 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-08-08 03:30:08,891 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-08-08 03:30:08,903 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-08-08 03:30:08,903 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-08-08 03:30:08,904 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-08-08 03:30:08,906 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-08-08 03:30:08,907 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-08-08 03:30:08,909 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-08-08 03:30:08,910 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-08-08 03:30:08,911 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-08-08 03:30:08,911 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-08-08 03:30:08,912 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-08-08 03:30:08,913 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-08-08 03:30:08,914 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-08-08 03:30:08,915 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-08-08 03:30:08,916 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-08-08 03:30:08,918 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-08-08 03:30:08,923 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-08-08 03:30:08,930 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-08-08 03:30:08,933 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-08-08 03:30:08,934 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-08-08 03:30:08,936 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-08-08 03:30:08,944 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/taipanbench/svcomp-Reach-64bit-ToothlessTaipan_Default-OldIcfg.epf [2018-08-08 03:30:08,960 INFO L110 SettingsManager]: Loading preferences was successful [2018-08-08 03:30:08,960 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-08-08 03:30:08,961 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-08-08 03:30:08,961 INFO L133 SettingsManager]: * User list type=DISABLED [2018-08-08 03:30:08,961 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-08-08 03:30:08,961 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-08-08 03:30:08,962 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-08-08 03:30:08,962 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-08-08 03:30:08,962 INFO L133 SettingsManager]: * Log string format=TERM [2018-08-08 03:30:08,962 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-08-08 03:30:08,962 INFO L133 SettingsManager]: * Interval Domain=false [2018-08-08 03:30:08,963 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-08-08 03:30:08,963 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-08-08 03:30:08,963 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-08-08 03:30:08,964 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-08-08 03:30:08,964 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-08-08 03:30:08,964 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-08-08 03:30:08,964 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-08-08 03:30:08,964 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-08-08 03:30:08,965 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-08-08 03:30:08,965 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-08-08 03:30:08,965 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-08-08 03:30:08,965 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-08-08 03:30:08,965 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-08-08 03:30:08,966 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-08-08 03:30:08,966 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-08-08 03:30:08,966 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-08-08 03:30:08,966 INFO L133 SettingsManager]: * Trace refinement strategy=TOOTHLESS_TAIPAN [2018-08-08 03:30:08,966 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-08-08 03:30:08,967 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-08-08 03:30:08,967 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-08-08 03:30:08,967 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-08-08 03:30:08,967 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-08-08 03:30:09,017 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-08-08 03:30:09,030 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-08-08 03:30:09,034 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-08-08 03:30:09,036 INFO L271 PluginConnector]: Initializing CDTParser... [2018-08-08 03:30:09,036 INFO L276 PluginConnector]: CDTParser initialized [2018-08-08 03:30:09,037 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/invert_string_true-unreach-call_true-termination.i [2018-08-08 03:30:09,379 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e70e63cf8/3bbadb8da014435cbb9b48c55e20d6fe/FLAGbd195ad97 [2018-08-08 03:30:09,544 INFO L276 CDTParser]: Found 1 translation units. [2018-08-08 03:30:09,544 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/invert_string_true-unreach-call_true-termination.i [2018-08-08 03:30:09,553 INFO L324 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e70e63cf8/3bbadb8da014435cbb9b48c55e20d6fe/FLAGbd195ad97 [2018-08-08 03:30:09,581 INFO L332 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e70e63cf8/3bbadb8da014435cbb9b48c55e20d6fe [2018-08-08 03:30:09,595 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-08-08 03:30:09,598 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-08-08 03:30:09,600 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-08-08 03:30:09,600 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-08-08 03:30:09,608 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-08-08 03:30:09,609 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.08 03:30:09" (1/1) ... [2018-08-08 03:30:09,613 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62fb1261 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.08 03:30:09, skipping insertion in model container [2018-08-08 03:30:09,613 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.08 03:30:09" (1/1) ... [2018-08-08 03:30:09,815 INFO L179 PRDispatcher]: Starting pre-run dispatcher in SV-COMP mode [2018-08-08 03:30:09,864 INFO L175 PostProcessor]: Settings: Checked method=main [2018-08-08 03:30:09,881 INFO L422 MainDispatcher]: Starting main dispatcher in SV-COMP mode [2018-08-08 03:30:09,889 INFO L175 PostProcessor]: Settings: Checked method=main [2018-08-08 03:30:09,904 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.08 03:30:09 WrapperNode [2018-08-08 03:30:09,904 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-08-08 03:30:09,905 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-08-08 03:30:09,906 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-08-08 03:30:09,906 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-08-08 03:30:09,917 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.08 03:30:09" (1/1) ... [2018-08-08 03:30:09,926 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.08 03:30:09" (1/1) ... [2018-08-08 03:30:09,932 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-08-08 03:30:09,933 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-08-08 03:30:09,933 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-08-08 03:30:09,933 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-08-08 03:30:09,944 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.08 03:30:09" (1/1) ... [2018-08-08 03:30:09,944 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.08 03:30:09" (1/1) ... [2018-08-08 03:30:09,946 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.08 03:30:09" (1/1) ... [2018-08-08 03:30:09,946 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.08 03:30:09" (1/1) ... [2018-08-08 03:30:09,948 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.08 03:30:09" (1/1) ... [2018-08-08 03:30:09,955 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.08 03:30:09" (1/1) ... [2018-08-08 03:30:09,957 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.08 03:30:09" (1/1) ... [2018-08-08 03:30:09,959 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-08-08 03:30:09,959 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-08-08 03:30:09,959 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-08-08 03:30:09,960 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-08-08 03:30:09,961 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.08 03:30:09" (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 [2018-08-08 03:30:10,042 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-08-08 03:30:10,042 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-08-08 03:30:10,043 INFO L130 BoogieDeclarations]: Found specification of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loops_invert_string_true_unreach_call_true_termination_i____VERIFIER_assert [2018-08-08 03:30:10,043 INFO L138 BoogieDeclarations]: Found implementation of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loops_invert_string_true_unreach_call_true_termination_i____VERIFIER_assert [2018-08-08 03:30:10,043 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-08-08 03:30:10,043 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-08-08 03:30:10,043 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-08-08 03:30:10,044 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-08-08 03:30:10,503 INFO L273 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-08-08 03:30:10,504 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.08 03:30:10 BoogieIcfgContainer [2018-08-08 03:30:10,504 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-08-08 03:30:10,506 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-08-08 03:30:10,506 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-08-08 03:30:10,509 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-08-08 03:30:10,510 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.08 03:30:09" (1/3) ... [2018-08-08 03:30:10,511 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b2f3922 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.08 03:30:10, skipping insertion in model container [2018-08-08 03:30:10,511 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.08 03:30:09" (2/3) ... [2018-08-08 03:30:10,511 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b2f3922 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.08 03:30:10, skipping insertion in model container [2018-08-08 03:30:10,512 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.08 03:30:10" (3/3) ... [2018-08-08 03:30:10,514 INFO L112 eAbstractionObserver]: Analyzing ICFG invert_string_true-unreach-call_true-termination.i [2018-08-08 03:30:10,525 INFO L133 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-08-08 03:30:10,533 INFO L145 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-08-08 03:30:10,585 INFO L129 ementStrategyFactory]: Using default assertion order modulation [2018-08-08 03:30:10,585 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-08-08 03:30:10,586 INFO L382 AbstractCegarLoop]: Hoare is true [2018-08-08 03:30:10,586 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-08-08 03:30:10,586 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-08-08 03:30:10,586 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-08-08 03:30:10,586 INFO L386 AbstractCegarLoop]: Difference is false [2018-08-08 03:30:10,587 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-08-08 03:30:10,587 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-08-08 03:30:10,606 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2018-08-08 03:30:10,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-08-08 03:30:10,613 INFO L368 BasicCegarLoop]: Found error trace [2018-08-08 03:30:10,615 INFO L376 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-08-08 03:30:10,616 INFO L423 AbstractCegarLoop]: === Iteration 1 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loops_invert_string_true_unreach_call_true_termination_i____VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-08-08 03:30:10,624 INFO L82 PathProgramCache]: Analyzing trace with hash 2061587637, now seen corresponding path program 1 times [2018-08-08 03:30:10,626 INFO L69 tionRefinementEngine]: Using refinement strategy ToothlessTaipanRefinementStrategy [2018-08-08 03:30:10,627 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 16 with the following transitions: [2018-08-08 03:30:10,629 INFO L202 CegarAbsIntRunner]: [0], [1], [4], [6], [15], [28], [30], [43], [45], [49], [54], [63], [64], [65], [67] [2018-08-08 03:30:10,682 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-08-08 03:30:10,683 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-08-08 03:30:10,751 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-08-08 03:30:10,753 INFO L272 AbstractInterpreter]: Visited 6 different actions 6 times. Never merged. Never widened. Never found a fixpoint. Largest state had 5 variables. [2018-08-08 03:30:10,790 INFO L399 sIntCurrentIteration]: Generating AbsInt predicates [2018-08-08 03:30:10,849 INFO L232 lantSequenceWeakener]: Weakened 1 states. On average, predicates are now at 50% of their original sizes. [2018-08-08 03:30:10,850 INFO L412 sIntCurrentIteration]: Unifying AI predicates [2018-08-08 03:30:10,882 INFO L423 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-08-08 03:30:10,884 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-08-08 03:30:10,884 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-08-08 03:30:10,885 INFO L262 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-08-08 03:30:10,890 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-08-08 03:30:10,896 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-08-08 03:30:10,897 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-08-08 03:30:10,899 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 3 states. [2018-08-08 03:30:10,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-08 03:30:10,993 INFO L93 Difference]: Finished difference Result 48 states and 59 transitions. [2018-08-08 03:30:10,993 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-08-08 03:30:10,995 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2018-08-08 03:30:10,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-08 03:30:11,002 INFO L225 Difference]: With dead ends: 48 [2018-08-08 03:30:11,002 INFO L226 Difference]: Without dead ends: 24 [2018-08-08 03:30:11,006 INFO L603 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 [2018-08-08 03:30:11,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-08-08 03:30:11,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-08-08 03:30:11,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-08-08 03:30:11,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2018-08-08 03:30:11,048 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 15 [2018-08-08 03:30:11,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-08 03:30:11,049 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2018-08-08 03:30:11,049 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-08-08 03:30:11,050 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2018-08-08 03:30:11,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-08-08 03:30:11,051 INFO L368 BasicCegarLoop]: Found error trace [2018-08-08 03:30:11,051 INFO L376 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-08-08 03:30:11,053 INFO L423 AbstractCegarLoop]: === Iteration 2 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loops_invert_string_true_unreach_call_true_termination_i____VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-08-08 03:30:11,053 INFO L82 PathProgramCache]: Analyzing trace with hash -1099360928, now seen corresponding path program 1 times [2018-08-08 03:30:11,053 INFO L69 tionRefinementEngine]: Using refinement strategy ToothlessTaipanRefinementStrategy [2018-08-08 03:30:11,054 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 18 with the following transitions: [2018-08-08 03:30:11,054 INFO L202 CegarAbsIntRunner]: [0], [1], [4], [6], [15], [19], [22], [30], [34], [37], [45], [49], [54], [63], [64], [65], [67] [2018-08-08 03:30:11,057 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-08-08 03:30:11,057 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-08-08 03:30:11,072 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-08-08 03:30:11,073 INFO L272 AbstractInterpreter]: Visited 7 different actions 7 times. Never merged. Never widened. Never found a fixpoint. Largest state had 5 variables. [2018-08-08 03:30:11,092 INFO L399 sIntCurrentIteration]: Generating AbsInt predicates [2018-08-08 03:30:11,115 INFO L224 lantSequenceWeakener]: Could never weaken! [2018-08-08 03:30:11,115 INFO L412 sIntCurrentIteration]: Unifying AI predicates [2018-08-08 03:30:11,145 INFO L423 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-08-08 03:30:11,146 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-08-08 03:30:11,146 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-08-08 03:30:11,146 INFO L262 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-08-08 03:30:11,148 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-08-08 03:30:11,148 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-08-08 03:30:11,148 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-08-08 03:30:11,148 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 3 states. [2018-08-08 03:30:11,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-08 03:30:11,240 INFO L93 Difference]: Finished difference Result 43 states and 47 transitions. [2018-08-08 03:30:11,241 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-08-08 03:30:11,241 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2018-08-08 03:30:11,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-08 03:30:11,242 INFO L225 Difference]: With dead ends: 43 [2018-08-08 03:30:11,243 INFO L226 Difference]: Without dead ends: 27 [2018-08-08 03:30:11,245 INFO L603 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 [2018-08-08 03:30:11,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-08-08 03:30:11,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2018-08-08 03:30:11,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-08-08 03:30:11,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2018-08-08 03:30:11,255 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 17 [2018-08-08 03:30:11,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-08 03:30:11,255 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2018-08-08 03:30:11,255 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-08-08 03:30:11,255 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2018-08-08 03:30:11,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-08-08 03:30:11,256 INFO L368 BasicCegarLoop]: Found error trace [2018-08-08 03:30:11,256 INFO L376 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-08-08 03:30:11,257 INFO L423 AbstractCegarLoop]: === Iteration 3 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loops_invert_string_true_unreach_call_true_termination_i____VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-08-08 03:30:11,257 INFO L82 PathProgramCache]: Analyzing trace with hash 1278639517, now seen corresponding path program 1 times [2018-08-08 03:30:11,257 INFO L69 tionRefinementEngine]: Using refinement strategy ToothlessTaipanRefinementStrategy [2018-08-08 03:30:11,257 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 21 with the following transitions: [2018-08-08 03:30:11,258 INFO L202 CegarAbsIntRunner]: [0], [1], [4], [6], [15], [19], [22], [24], [26], [30], [34], [37], [45], [49], [54], [63], [64], [65], [67] [2018-08-08 03:30:11,260 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-08-08 03:30:11,261 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-08-08 03:30:11,282 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-08-08 03:30:11,663 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-08-08 03:30:11,663 INFO L272 AbstractInterpreter]: Visited 19 different actions 187 times. Merged at 4 different actions 134 times. Widened at 1 different actions 30 times. Found 33 fixpoints after 2 different actions. Largest state had 7 variables. [2018-08-08 03:30:11,704 INFO L442 BasicCegarLoop]: Counterexample might be feasible [2018-08-08 03:30:11,723 WARN L205 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2018-08-08 03:30:11,723 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 08.08 03:30:11 BoogieIcfgContainer [2018-08-08 03:30:11,723 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-08-08 03:30:11,724 INFO L168 Benchmark]: Toolchain (without parser) took 2127.57 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 754.5 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -736.6 MB). Peak memory consumption was 17.9 MB. Max. memory is 7.1 GB. [2018-08-08 03:30:11,727 INFO L168 Benchmark]: CDTParser took 0.20 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. [2018-08-08 03:30:11,727 INFO L168 Benchmark]: CACSL2BoogieTranslator took 305.17 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. [2018-08-08 03:30:11,728 INFO L168 Benchmark]: Boogie Procedure Inliner took 27.29 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. [2018-08-08 03:30:11,729 INFO L168 Benchmark]: Boogie Preprocessor took 25.87 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. [2018-08-08 03:30:11,729 INFO L168 Benchmark]: RCFGBuilder took 545.27 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 754.5 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -810.0 MB). Peak memory consumption was 26.9 MB. Max. memory is 7.1 GB. [2018-08-08 03:30:11,731 INFO L168 Benchmark]: TraceAbstraction took 1217.77 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.2 GB in the end (delta: 59.5 MB). Peak memory consumption was 59.5 MB. Max. memory is 7.1 GB. [2018-08-08 03:30:11,736 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 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 305.17 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 27.29 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 25.87 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 545.27 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 754.5 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -810.0 MB). Peak memory consumption was 26.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1217.77 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.2 GB in the end (delta: 59.5 MB). Peak memory consumption was 59.5 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