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-dace188-m [2018-09-15 15:47:30,288 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-15 15:47:30,290 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-15 15:47:30,306 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-15 15:47:30,307 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-15 15:47:30,308 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-15 15:47:30,309 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-15 15:47:30,311 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-15 15:47:30,313 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-15 15:47:30,314 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-15 15:47:30,315 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-09-15 15:47:30,315 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-09-15 15:47:30,316 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-09-15 15:47:30,317 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-09-15 15:47:30,318 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-09-15 15:47:30,319 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-09-15 15:47:30,320 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-09-15 15:47:30,322 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-09-15 15:47:30,324 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-09-15 15:47:30,326 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-09-15 15:47:30,327 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-09-15 15:47:30,328 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-09-15 15:47:30,331 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-09-15 15:47:30,341 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 [2018-09-15 15:47:30,370 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-15 15:47:30,371 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-15 15:47:30,374 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-15 15:47:30,375 INFO L133 SettingsManager]: * User list type=DISABLED [2018-09-15 15:47:30,375 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-09-15 15:47:30,375 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-09-15 15:47:30,375 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-09-15 15:47:30,376 INFO L133 SettingsManager]: * Octagon Domain=false [2018-09-15 15:47:30,376 INFO L133 SettingsManager]: * Abstract domain=CongruenceDomain [2018-09-15 15:47:30,376 INFO L133 SettingsManager]: * Log string format=TERM [2018-09-15 15:47:30,376 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-09-15 15:47:30,376 INFO L133 SettingsManager]: * Interval Domain=false [2018-09-15 15:47:30,377 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-15 15:47:30,378 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-15 15:47:30,378 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-15 15:47:30,379 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-15 15:47:30,379 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-15 15:47:30,379 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-15 15:47:30,379 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-15 15:47:30,379 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-15 15:47:30,380 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-15 15:47:30,380 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-15 15:47:30,380 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-15 15:47:30,380 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-15 15:47:30,381 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-15 15:47:30,382 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-15 15:47:30,382 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-15 15:47:30,382 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-15 15:47:30,382 INFO L133 SettingsManager]: * Trace refinement strategy=TOOTHLESS_TAIPAN [2018-09-15 15:47:30,383 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-15 15:47:30,383 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-15 15:47:30,383 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-15 15:47:30,383 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-09-15 15:47:30,384 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-09-15 15:47:30,440 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-15 15:47:30,458 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-15 15:47:30,465 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-15 15:47:30,467 INFO L271 PluginConnector]: Initializing CDTParser... [2018-09-15 15:47:30,468 INFO L276 PluginConnector]: CDTParser initialized [2018-09-15 15:47:30,468 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/invert_string_true-unreach-call_true-termination.i [2018-09-15 15:47:30,805 INFO L221 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c12890a45/616c64754c59484b9c38c19c6b646783/FLAG280a7261c [2018-09-15 15:47:30,984 INFO L277 CDTParser]: Found 1 translation units. [2018-09-15 15:47:30,985 INFO L159 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/invert_string_true-unreach-call_true-termination.i [2018-09-15 15:47:30,994 INFO L325 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c12890a45/616c64754c59484b9c38c19c6b646783/FLAG280a7261c [2018-09-15 15:47:31,020 INFO L333 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c12890a45/616c64754c59484b9c38c19c6b646783 [2018-09-15 15:47:31,035 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-15 15:47:31,041 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-09-15 15:47:31,046 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-09-15 15:47:31,047 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-09-15 15:47:31,054 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-09-15 15:47:31,055 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.09 03:47:31" (1/1) ... [2018-09-15 15:47:31,059 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6652310c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 03:47:31, skipping insertion in model container [2018-09-15 15:47:31,059 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.09 03:47:31" (1/1) ... [2018-09-15 15:47:31,073 INFO L160 ieTranslatorObserver]: Starting translation in SV-COMP mode [2018-09-15 15:47:31,286 INFO L170 PostProcessor]: Settings: Checked method=main [2018-09-15 15:47:31,307 INFO L424 MainDispatcher]: Starting main dispatcher in SV-COMP mode [2018-09-15 15:47:31,321 INFO L170 PostProcessor]: Settings: Checked method=main [2018-09-15 15:47:31,338 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 03:47:31 WrapperNode [2018-09-15 15:47:31,339 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-09-15 15:47:31,340 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-15 15:47:31,340 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-15 15:47:31,340 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-15 15:47:31,351 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 03:47:31" (1/1) ... [2018-09-15 15:47:31,359 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 03:47:31" (1/1) ... [2018-09-15 15:47:31,366 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-15 15:47:31,366 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-15 15:47:31,366 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-15 15:47:31,366 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-15 15:47:31,377 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 03:47:31" (1/1) ... [2018-09-15 15:47:31,378 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 03:47:31" (1/1) ... [2018-09-15 15:47:31,380 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 03:47:31" (1/1) ... [2018-09-15 15:47:31,380 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 03:47:31" (1/1) ... [2018-09-15 15:47:31,383 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 03:47:31" (1/1) ... [2018-09-15 15:47:31,398 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 03:47:31" (1/1) ... [2018-09-15 15:47:31,399 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 03:47:31" (1/1) ... [2018-09-15 15:47:31,402 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-15 15:47:31,408 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-15 15:47:31,409 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-15 15:47:31,409 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-15 15:47:31,410 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 03:47:31" (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 [2018-09-15 15:47:31,489 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-09-15 15:47:31,489 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-09-15 15:47:31,489 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-15 15:47:31,490 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-15 15:47:31,490 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-09-15 15:47:31,490 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-09-15 15:47:31,490 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-09-15 15:47:31,490 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-09-15 15:47:32,091 INFO L353 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-15 15:47:32,093 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.09 03:47:32 BoogieIcfgContainer [2018-09-15 15:47:32,093 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-15 15:47:32,094 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-15 15:47:32,094 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-15 15:47:32,098 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-15 15:47:32,098 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.09 03:47:31" (1/3) ... [2018-09-15 15:47:32,099 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c166af5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.09 03:47:32, skipping insertion in model container [2018-09-15 15:47:32,099 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 03:47:31" (2/3) ... [2018-09-15 15:47:32,100 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c166af5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.09 03:47:32, skipping insertion in model container [2018-09-15 15:47:32,100 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.09 03:47:32" (3/3) ... [2018-09-15 15:47:32,102 INFO L112 eAbstractionObserver]: Analyzing ICFG invert_string_true-unreach-call_true-termination.i [2018-09-15 15:47:32,112 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-15 15:47:32,124 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-15 15:47:32,178 INFO L130 ementStrategyFactory]: Using default assertion order modulation [2018-09-15 15:47:32,179 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-15 15:47:32,179 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-15 15:47:32,180 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-15 15:47:32,180 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-15 15:47:32,180 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-15 15:47:32,180 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-15 15:47:32,180 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-15 15:47:32,180 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-15 15:47:32,200 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2018-09-15 15:47:32,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-15 15:47:32,207 INFO L368 BasicCegarLoop]: Found error trace [2018-09-15 15:47:32,208 INFO L376 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-15 15:47:32,209 INFO L423 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-15 15:47:32,215 INFO L82 PathProgramCache]: Analyzing trace with hash 1728315421, now seen corresponding path program 1 times [2018-09-15 15:47:32,218 INFO L69 tionRefinementEngine]: Using refinement strategy ToothlessTaipanRefinementStrategy [2018-09-15 15:47:32,219 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 16 with the following transitions: [2018-09-15 15:47:32,221 INFO L202 CegarAbsIntRunner]: [0], [4], [17], [19], [32], [34], [38], [43], [52], [55], [57], [63], [64], [65], [67] [2018-09-15 15:47:32,252 INFO L148 AbstractInterpreter]: Using domain CongruenceDomain [2018-09-15 15:47:32,252 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CongruenceDomain (maxUnwinding=3, maxParallelStates=2) [2018-09-15 15:47:32,308 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-09-15 15:47:32,309 INFO L272 AbstractInterpreter]: Visited 6 different actions 6 times. Never merged. Never widened. Never found a fixpoint. Largest state had 5 variables. [2018-09-15 15:47:32,353 INFO L399 sIntCurrentIteration]: Generating AbsInt predicates [2018-09-15 15:47:32,405 INFO L232 lantSequenceWeakener]: Weakened 1 states. On average, predicates are now at 50% of their original sizes. [2018-09-15 15:47:32,406 INFO L412 sIntCurrentIteration]: Unifying AI predicates [2018-09-15 15:47:32,419 INFO L423 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-09-15 15:47:32,421 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-15 15:47:32,421 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-15 15:47:32,421 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-15 15:47:32,426 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-15 15:47:32,431 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-15 15:47:32,432 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-15 15:47:32,434 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 3 states. [2018-09-15 15:47:32,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-15 15:47:32,506 INFO L93 Difference]: Finished difference Result 48 states and 59 transitions. [2018-09-15 15:47:32,507 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-15 15:47:32,508 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2018-09-15 15:47:32,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-15 15:47:32,516 INFO L225 Difference]: With dead ends: 48 [2018-09-15 15:47:32,516 INFO L226 Difference]: Without dead ends: 24 [2018-09-15 15:47:32,520 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 [2018-09-15 15:47:32,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-09-15 15:47:32,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-09-15 15:47:32,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-15 15:47:32,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2018-09-15 15:47:32,558 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 15 [2018-09-15 15:47:32,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-15 15:47:32,559 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2018-09-15 15:47:32,559 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-15 15:47:32,559 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2018-09-15 15:47:32,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-15 15:47:32,560 INFO L368 BasicCegarLoop]: Found error trace [2018-09-15 15:47:32,560 INFO L376 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-15 15:47:32,561 INFO L423 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-15 15:47:32,561 INFO L82 PathProgramCache]: Analyzing trace with hash 374890024, now seen corresponding path program 1 times [2018-09-15 15:47:32,562 INFO L69 tionRefinementEngine]: Using refinement strategy ToothlessTaipanRefinementStrategy [2018-09-15 15:47:32,562 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 18 with the following transitions: [2018-09-15 15:47:32,562 INFO L202 CegarAbsIntRunner]: [0], [4], [8], [11], [19], [23], [26], [34], [38], [43], [52], [55], [57], [63], [64], [65], [67] [2018-09-15 15:47:32,564 INFO L148 AbstractInterpreter]: Using domain CongruenceDomain [2018-09-15 15:47:32,564 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CongruenceDomain (maxUnwinding=3, maxParallelStates=2) [2018-09-15 15:47:32,574 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-09-15 15:47:32,574 INFO L272 AbstractInterpreter]: Visited 7 different actions 7 times. Never merged. Never widened. Never found a fixpoint. Largest state had 5 variables. [2018-09-15 15:47:32,600 INFO L399 sIntCurrentIteration]: Generating AbsInt predicates [2018-09-15 15:47:32,609 INFO L224 lantSequenceWeakener]: Could never weaken! [2018-09-15 15:47:32,609 INFO L412 sIntCurrentIteration]: Unifying AI predicates [2018-09-15 15:47:32,616 INFO L423 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-09-15 15:47:32,616 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-15 15:47:32,616 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-15 15:47:32,616 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-15 15:47:32,617 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-15 15:47:32,618 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-15 15:47:32,618 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-15 15:47:32,618 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 3 states. [2018-09-15 15:47:32,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-15 15:47:32,691 INFO L93 Difference]: Finished difference Result 43 states and 47 transitions. [2018-09-15 15:47:32,692 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-15 15:47:32,692 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2018-09-15 15:47:32,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-15 15:47:32,693 INFO L225 Difference]: With dead ends: 43 [2018-09-15 15:47:32,694 INFO L226 Difference]: Without dead ends: 27 [2018-09-15 15:47:32,696 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 [2018-09-15 15:47:32,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-09-15 15:47:32,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2018-09-15 15:47:32,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-15 15:47:32,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2018-09-15 15:47:32,703 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 17 [2018-09-15 15:47:32,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-15 15:47:32,703 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2018-09-15 15:47:32,704 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-15 15:47:32,704 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2018-09-15 15:47:32,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-09-15 15:47:32,705 INFO L368 BasicCegarLoop]: Found error trace [2018-09-15 15:47:32,705 INFO L376 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-15 15:47:32,705 INFO L423 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-15 15:47:32,706 INFO L82 PathProgramCache]: Analyzing trace with hash 1641808688, now seen corresponding path program 1 times [2018-09-15 15:47:32,706 INFO L69 tionRefinementEngine]: Using refinement strategy ToothlessTaipanRefinementStrategy [2018-09-15 15:47:32,706 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 21 with the following transitions: [2018-09-15 15:47:32,707 INFO L202 CegarAbsIntRunner]: [0], [4], [8], [11], [13], [15], [19], [23], [26], [34], [38], [43], [52], [55], [57], [63], [64], [65], [67] [2018-09-15 15:47:32,708 INFO L148 AbstractInterpreter]: Using domain CongruenceDomain [2018-09-15 15:47:32,708 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CongruenceDomain (maxUnwinding=3, maxParallelStates=2) [2018-09-15 15:47:32,737 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-09-15 15:47:32,737 INFO L272 AbstractInterpreter]: Visited 19 different actions 27 times. Merged at 3 different actions 6 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 7 variables. [2018-09-15 15:47:32,770 INFO L443 BasicCegarLoop]: Counterexample might be feasible [2018-09-15 15:47:32,789 WARN L209 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2018-09-15 15:47:32,790 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.09 03:47:32 BoogieIcfgContainer [2018-09-15 15:47:32,790 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-15 15:47:32,791 INFO L168 Benchmark]: Toolchain (without parser) took 1754.61 ms. Allocated memory was 1.6 GB in the beginning and 2.3 GB in the end (delta: 743.4 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -759.0 MB). There was no memory consumed. Max. memory is 7.1 GB. [2018-09-15 15:47:32,793 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 1.6 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-15 15:47:32,794 INFO L168 Benchmark]: CACSL2BoogieTranslator took 292.80 ms. Allocated memory is still 1.6 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. [2018-09-15 15:47:32,795 INFO L168 Benchmark]: Boogie Procedure Inliner took 26.18 ms. Allocated memory is still 1.6 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-15 15:47:32,795 INFO L168 Benchmark]: Boogie Preprocessor took 35.96 ms. Allocated memory is still 1.6 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-15 15:47:32,796 INFO L168 Benchmark]: RCFGBuilder took 684.43 ms. Allocated memory was 1.6 GB in the beginning and 2.3 GB in the end (delta: 743.4 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -795.2 MB). Peak memory consumption was 26.9 MB. Max. memory is 7.1 GB. [2018-09-15 15:47:32,797 INFO L168 Benchmark]: TraceAbstraction took 695.66 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: 25.5 MB). Peak memory consumption was 25.5 MB. Max. memory is 7.1 GB. [2018-09-15 15:47:32,802 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 1.6 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 292.80 ms. Allocated memory is still 1.6 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 26.18 ms. Allocated memory is still 1.6 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 35.96 ms. Allocated memory is still 1.6 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 684.43 ms. Allocated memory was 1.6 GB in the beginning and 2.3 GB in the end (delta: 743.4 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -795.2 MB). Peak memory consumption was 26.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 695.66 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: 25.5 MB). Peak memory consumption was 25.5 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