java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/ai/svcomp-Reach-32bit-Automizer_Default+AIv2_INT.epf -i ../../../trunk/examples/svcomp/recursive/Ackermann03.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-10 02:51:22,437 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-10 02:51:22,439 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-10 02:51:22,457 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-09-10 02:51:22,458 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-09-10 02:51:22,460 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-09-10 02:51:22,462 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-09-10 02:51:22,475 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-09-10 02:51:22,477 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-09-10 02:51:22,478 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-09-10 02:51:22,479 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-09-10 02:51:22,480 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-09-10 02:51:22,480 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-10 02:51:22,481 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-10 02:51:22,482 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-10 02:51:22,484 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-10 02:51:22,484 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-10 02:51:22,485 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-10 02:51:22,487 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-10 02:51:22,489 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-10 02:51:22,491 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-10 02:51:22,492 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-10 02:51:22,493 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-10 02:51:22,494 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-10 02:51:22,496 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-09-10 02:51:22,496 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-09-10 02:51:22,496 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-09-10 02:51:22,497 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-09-10 02:51:22,498 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-09-10 02:51:22,499 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-09-10 02:51:22,499 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-09-10 02:51:22,500 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-09-10 02:51:22,501 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-09-10 02:51:22,502 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-09-10 02:51:22,503 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-09-10 02:51:22,503 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-09-10 02:51:22,504 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-09-10 02:51:22,504 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-09-10 02:51:22,504 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-10 02:51:22,505 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-10 02:51:22,506 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-10 02:51:22,507 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/svcomp-Reach-32bit-Automizer_Default+AIv2_INT.epf [2019-09-10 02:51:22,524 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-10 02:51:22,525 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-10 02:51:22,526 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-10 02:51:22,526 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-10 02:51:22,527 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-10 02:51:22,527 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-10 02:51:22,528 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-10 02:51:22,528 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-10 02:51:22,528 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-10 02:51:22,528 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-10 02:51:22,529 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-10 02:51:22,529 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-10 02:51:22,529 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-10 02:51:22,529 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-10 02:51:22,530 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-10 02:51:22,530 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-10 02:51:22,530 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-10 02:51:22,530 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-10 02:51:22,530 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-10 02:51:22,531 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-10 02:51:22,531 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-10 02:51:22,531 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-10 02:51:22,531 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-10 02:51:22,532 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-10 02:51:22,532 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-10 02:51:22,532 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-10 02:51:22,532 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-10 02:51:22,532 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-10 02:51:22,533 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-10 02:51:22,533 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-10 02:51:22,585 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-10 02:51:22,603 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-10 02:51:22,606 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-10 02:51:22,608 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-10 02:51:22,608 INFO L275 PluginConnector]: CDTParser initialized [2019-09-10 02:51:22,609 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/Ackermann03.c [2019-09-10 02:51:22,687 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f333fcc88/7b09e2a21ba944b3904fc8c7574c5d01/FLAG9bbb9ee7e [2019-09-10 02:51:23,151 INFO L306 CDTParser]: Found 1 translation units. [2019-09-10 02:51:23,151 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive/Ackermann03.c [2019-09-10 02:51:23,158 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f333fcc88/7b09e2a21ba944b3904fc8c7574c5d01/FLAG9bbb9ee7e [2019-09-10 02:51:23,547 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f333fcc88/7b09e2a21ba944b3904fc8c7574c5d01 [2019-09-10 02:51:23,559 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-10 02:51:23,561 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-10 02:51:23,562 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-10 02:51:23,562 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-10 02:51:23,566 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-10 02:51:23,567 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.09 02:51:23" (1/1) ... [2019-09-10 02:51:23,570 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@163c6b70 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 02:51:23, skipping insertion in model container [2019-09-10 02:51:23,570 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.09 02:51:23" (1/1) ... [2019-09-10 02:51:23,579 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-10 02:51:23,597 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-10 02:51:23,874 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-10 02:51:23,879 INFO L188 MainTranslator]: Completed pre-run [2019-09-10 02:51:23,904 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-10 02:51:23,923 INFO L192 MainTranslator]: Completed translation [2019-09-10 02:51:23,924 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 02:51:23 WrapperNode [2019-09-10 02:51:23,924 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-10 02:51:23,925 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-10 02:51:23,925 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-10 02:51:23,925 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-10 02:51:24,066 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 02:51:23" (1/1) ... [2019-09-10 02:51:24,068 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 02:51:23" (1/1) ... [2019-09-10 02:51:24,079 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 02:51:23" (1/1) ... [2019-09-10 02:51:24,079 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 02:51:23" (1/1) ... [2019-09-10 02:51:24,088 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 02:51:23" (1/1) ... [2019-09-10 02:51:24,091 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 02:51:23" (1/1) ... [2019-09-10 02:51:24,092 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 02:51:23" (1/1) ... [2019-09-10 02:51:24,101 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-10 02:51:24,101 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-10 02:51:24,102 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-10 02:51:24,102 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-10 02:51:24,103 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 02:51:23" (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 [2019-09-10 02:51:24,178 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-10 02:51:24,178 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-10 02:51:24,178 INFO L138 BoogieDeclarations]: Found implementation of procedure ackermann [2019-09-10 02:51:24,178 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-10 02:51:24,179 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-10 02:51:24,179 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-10 02:51:24,179 INFO L130 BoogieDeclarations]: Found specification of procedure ackermann [2019-09-10 02:51:24,179 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-10 02:51:24,179 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-10 02:51:24,179 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-10 02:51:24,398 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-10 02:51:24,399 INFO L283 CfgBuilder]: Removed 0 assume(true) statements. [2019-09-10 02:51:24,400 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.09 02:51:24 BoogieIcfgContainer [2019-09-10 02:51:24,401 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-10 02:51:24,402 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-10 02:51:24,402 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-10 02:51:24,406 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-10 02:51:24,407 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.09 02:51:23" (1/3) ... [2019-09-10 02:51:24,415 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@716b5287 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.09 02:51:24, skipping insertion in model container [2019-09-10 02:51:24,415 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 02:51:23" (2/3) ... [2019-09-10 02:51:24,416 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@716b5287 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.09 02:51:24, skipping insertion in model container [2019-09-10 02:51:24,416 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.09 02:51:24" (3/3) ... [2019-09-10 02:51:24,427 INFO L109 eAbstractionObserver]: Analyzing ICFG Ackermann03.c [2019-09-10 02:51:24,453 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-10 02:51:24,471 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-10 02:51:24,493 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-10 02:51:24,519 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-10 02:51:24,520 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-10 02:51:24,520 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-10 02:51:24,520 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-10 02:51:24,520 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-10 02:51:24,521 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-10 02:51:24,521 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-10 02:51:24,521 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-10 02:51:24,534 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2019-09-10 02:51:24,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-09-10 02:51:24,545 INFO L391 BasicCegarLoop]: Found error trace [2019-09-10 02:51:24,546 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-10 02:51:24,548 INFO L418 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-10 02:51:24,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 02:51:24,554 INFO L82 PathProgramCache]: Analyzing trace with hash -1796234678, now seen corresponding path program 1 times [2019-09-10 02:51:24,556 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-10 02:51:24,601 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 02:51:24,602 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 02:51:24,602 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 02:51:24,602 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-10 02:51:24,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 02:51:24,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-10 02:51:24,747 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-10 02:51:24,747 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-10 02:51:24,747 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-10 02:51:24,751 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-10 02:51:24,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-10 02:51:24,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-10 02:51:24,765 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 5 states. [2019-09-10 02:51:24,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-10 02:51:24,943 INFO L93 Difference]: Finished difference Result 36 states and 46 transitions. [2019-09-10 02:51:24,944 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-10 02:51:24,945 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2019-09-10 02:51:24,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-10 02:51:24,955 INFO L225 Difference]: With dead ends: 36 [2019-09-10 02:51:24,955 INFO L226 Difference]: Without dead ends: 28 [2019-09-10 02:51:24,957 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-09-10 02:51:24,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-09-10 02:51:24,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2019-09-10 02:51:24,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-09-10 02:51:24,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 35 transitions. [2019-09-10 02:51:25,001 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 35 transitions. Word has length 15 [2019-09-10 02:51:25,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-10 02:51:25,001 INFO L475 AbstractCegarLoop]: Abstraction has 28 states and 35 transitions. [2019-09-10 02:51:25,002 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-10 02:51:25,002 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 35 transitions. [2019-09-10 02:51:25,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-09-10 02:51:25,004 INFO L391 BasicCegarLoop]: Found error trace [2019-09-10 02:51:25,005 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-10 02:51:25,005 INFO L418 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-10 02:51:25,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 02:51:25,006 INFO L82 PathProgramCache]: Analyzing trace with hash -895156504, now seen corresponding path program 1 times [2019-09-10 02:51:25,006 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-10 02:51:25,007 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 02:51:25,007 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 02:51:25,008 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 02:51:25,008 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-10 02:51:25,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 02:51:25,090 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-09-10 02:51:25,090 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-10 02:51:25,091 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-10 02:51:25,096 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 23 with the following transitions: [2019-09-10 02:51:25,098 INFO L207 CegarAbsIntRunner]: [0], [4], [7], [8], [11], [13], [19], [20], [24], [28], [30], [34], [36], [39], [40], [41], [43], [44], [49], [50] [2019-09-10 02:51:25,140 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-10 02:51:25,140 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-10 02:51:25,258 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-09-10 02:51:25,261 INFO L272 AbstractInterpreter]: Visited 20 different actions 27 times. Merged at 2 different actions 2 times. Never widened. Performed 33 root evaluator evaluations with a maximum evaluation depth of 7. Performed 33 inverse root evaluator evaluations with a maximum inverse evaluation depth of 7. Found 1 fixpoints after 1 different actions. Largest state had 6 variables. [2019-09-10 02:51:25,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 02:51:25,265 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-09-10 02:51:25,265 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-10 02:51:25,265 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-10 02:51:25,298 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 02:51:25,299 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-09-10 02:51:25,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 02:51:25,326 INFO L256 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 4 conjunts are in the unsatisfiable core [2019-09-10 02:51:25,333 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-10 02:51:25,359 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-09-10 02:51:25,360 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-10 02:51:25,473 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-09-10 02:51:25,479 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-09-10 02:51:25,479 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2019-09-10 02:51:25,480 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-09-10 02:51:25,480 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-10 02:51:25,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-10 02:51:25,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2019-09-10 02:51:25,482 INFO L87 Difference]: Start difference. First operand 28 states and 35 transitions. Second operand 5 states. [2019-09-10 02:51:25,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-10 02:51:25,590 INFO L93 Difference]: Finished difference Result 32 states and 41 transitions. [2019-09-10 02:51:25,591 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-10 02:51:25,592 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2019-09-10 02:51:25,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-10 02:51:25,594 INFO L225 Difference]: With dead ends: 32 [2019-09-10 02:51:25,595 INFO L226 Difference]: Without dead ends: 30 [2019-09-10 02:51:25,596 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2019-09-10 02:51:25,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-09-10 02:51:25,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2019-09-10 02:51:25,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-09-10 02:51:25,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 39 transitions. [2019-09-10 02:51:25,617 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 39 transitions. Word has length 22 [2019-09-10 02:51:25,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-10 02:51:25,617 INFO L475 AbstractCegarLoop]: Abstraction has 30 states and 39 transitions. [2019-09-10 02:51:25,618 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-10 02:51:25,618 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 39 transitions. [2019-09-10 02:51:25,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-09-10 02:51:25,623 INFO L391 BasicCegarLoop]: Found error trace [2019-09-10 02:51:25,623 INFO L399 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-10 02:51:25,624 INFO L418 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-10 02:51:25,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 02:51:25,625 INFO L82 PathProgramCache]: Analyzing trace with hash 718507263, now seen corresponding path program 1 times [2019-09-10 02:51:25,626 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-10 02:51:25,630 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 02:51:25,630 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 02:51:25,630 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 02:51:25,630 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-10 02:51:25,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 02:51:25,783 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-09-10 02:51:25,784 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-10 02:51:25,784 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-10 02:51:25,784 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 36 with the following transitions: [2019-09-10 02:51:25,785 INFO L207 CegarAbsIntRunner]: [0], [4], [7], [8], [11], [13], [14], [16], [18], [19], [20], [24], [28], [30], [34], [36], [39], [40], [41], [43], [44], [45], [46], [47], [48], [49], [50] [2019-09-10 02:51:25,787 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-10 02:51:25,788 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)