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/loop-acceleration/underapprox_1-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fea9116 [2019-09-20 13:25:23,194 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-20 13:25:23,196 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-20 13:25:23,207 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-20 13:25:23,217 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-20 13:25:23,218 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-20 13:25:23,219 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-20 13:25:23,220 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-20 13:25:23,220 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-20 13:25:23,221 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-20 13:25:23,223 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-20 13:25:23,225 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-20 13:25:23,227 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-20 13:25:23,228 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-20 13:25:23,229 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-20 13:25:23,230 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-20 13:25:23,233 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-20 13:25:23,236 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-09-20 13:25:23,237 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-09-20 13:25:23,238 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-09-20 13:25:23,239 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-09-20 13:25:23,240 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-09-20 13:25:23,240 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-09-20 13:25:23,241 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-09-20 13:25:23,241 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-09-20 13:25:23,241 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-20 13:25:23,242 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-20 13:25:23,243 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-20 13:25:23,244 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 [2019-09-20 13:25:23,259 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-20 13:25:23,259 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-20 13:25:23,260 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-20 13:25:23,260 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-20 13:25:23,261 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-20 13:25:23,261 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-20 13:25:23,261 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-20 13:25:23,261 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-20 13:25:23,261 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-20 13:25:23,262 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-20 13:25:23,262 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-20 13:25:23,262 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-20 13:25:23,263 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-20 13:25:23,263 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-20 13:25:23,263 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-20 13:25:23,263 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-20 13:25:23,263 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-20 13:25:23,264 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-20 13:25:23,264 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-20 13:25:23,264 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-20 13:25:23,264 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-20 13:25:23,264 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-20 13:25:23,265 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-20 13:25:23,265 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-20 13:25:23,265 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-20 13:25:23,265 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-20 13:25:23,265 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-20 13:25:23,266 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-20 13:25:23,266 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-20 13:25:23,266 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-20 13:25:23,294 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-20 13:25:23,306 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-20 13:25:23,309 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-20 13:25:23,310 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-20 13:25:23,311 INFO L275 PluginConnector]: CDTParser initialized [2019-09-20 13:25:23,311 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/underapprox_1-1.c [2019-09-20 13:25:23,369 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/44a0f23c8/1be30e478cd94e74972f3cd2986eff96/FLAG54a8f4251 [2019-09-20 13:25:23,796 INFO L306 CDTParser]: Found 1 translation units. [2019-09-20 13:25:23,796 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/underapprox_1-1.c [2019-09-20 13:25:23,803 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/44a0f23c8/1be30e478cd94e74972f3cd2986eff96/FLAG54a8f4251 [2019-09-20 13:25:24,196 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/44a0f23c8/1be30e478cd94e74972f3cd2986eff96 [2019-09-20 13:25:24,211 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-20 13:25:24,215 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-20 13:25:24,220 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-20 13:25:24,220 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-20 13:25:24,224 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-20 13:25:24,226 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 01:25:24" (1/1) ... [2019-09-20 13:25:24,228 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@20a31688 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:25:24, skipping insertion in model container [2019-09-20 13:25:24,229 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 01:25:24" (1/1) ... [2019-09-20 13:25:24,237 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-20 13:25:24,256 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-20 13:25:24,487 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-20 13:25:24,494 INFO L188 MainTranslator]: Completed pre-run [2019-09-20 13:25:24,513 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-20 13:25:24,532 INFO L192 MainTranslator]: Completed translation [2019-09-20 13:25:24,532 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:25:24 WrapperNode [2019-09-20 13:25:24,533 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-20 13:25:24,534 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-20 13:25:24,534 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-20 13:25:24,534 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-20 13:25:24,630 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:25:24" (1/1) ... [2019-09-20 13:25:24,631 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:25:24" (1/1) ... [2019-09-20 13:25:24,640 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:25:24" (1/1) ... [2019-09-20 13:25:24,640 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:25:24" (1/1) ... [2019-09-20 13:25:24,644 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:25:24" (1/1) ... [2019-09-20 13:25:24,649 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:25:24" (1/1) ... [2019-09-20 13:25:24,650 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:25:24" (1/1) ... [2019-09-20 13:25:24,652 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-20 13:25:24,652 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-20 13:25:24,652 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-20 13:25:24,653 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-20 13:25:24,654 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:25:24" (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 [2019-09-20 13:25:24,707 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-20 13:25:24,707 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-20 13:25:24,707 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-09-20 13:25:24,707 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-20 13:25:24,707 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-20 13:25:24,708 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-09-20 13:25:24,708 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-20 13:25:24,708 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-20 13:25:24,708 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-20 13:25:24,873 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-20 13:25:24,873 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-20 13:25:24,874 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 01:25:24 BoogieIcfgContainer [2019-09-20 13:25:24,875 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-20 13:25:24,876 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-20 13:25:24,876 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-20 13:25:24,879 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-20 13:25:24,879 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.09 01:25:24" (1/3) ... [2019-09-20 13:25:24,880 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72ed6d8c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 01:25:24, skipping insertion in model container [2019-09-20 13:25:24,880 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:25:24" (2/3) ... [2019-09-20 13:25:24,880 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72ed6d8c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 01:25:24, skipping insertion in model container [2019-09-20 13:25:24,881 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 01:25:24" (3/3) ... [2019-09-20 13:25:24,882 INFO L109 eAbstractionObserver]: Analyzing ICFG underapprox_1-1.c [2019-09-20 13:25:24,892 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-20 13:25:24,899 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-20 13:25:24,915 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-20 13:25:24,941 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-20 13:25:24,941 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-20 13:25:24,941 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-20 13:25:24,941 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-20 13:25:24,942 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-20 13:25:24,942 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-20 13:25:24,942 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-20 13:25:24,942 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-20 13:25:24,955 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2019-09-20 13:25:24,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-09-20 13:25:24,962 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:25:24,963 INFO L407 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 13:25:24,965 INFO L418 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:25:24,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:25:24,970 INFO L82 PathProgramCache]: Analyzing trace with hash 1846144830, now seen corresponding path program 1 times [2019-09-20 13:25:24,972 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-20 13:25:25,015 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:25:25,015 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:25:25,015 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:25:25,016 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-20 13:25:25,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:25:25,304 WARN L191 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 5 [2019-09-20 13:25:25,307 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-20 13:25:25,310 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-20 13:25:25,310 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-20 13:25:25,310 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-20 13:25:25,315 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-20 13:25:25,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-20 13:25:25,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-20 13:25:25,335 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 3 states. [2019-09-20 13:25:25,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 13:25:25,378 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2019-09-20 13:25:25,380 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-20 13:25:25,381 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2019-09-20 13:25:25,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 13:25:25,391 INFO L225 Difference]: With dead ends: 18 [2019-09-20 13:25:25,392 INFO L226 Difference]: Without dead ends: 12 [2019-09-20 13:25:25,396 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-20 13:25:25,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2019-09-20 13:25:25,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2019-09-20 13:25:25,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2019-09-20 13:25:25,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2019-09-20 13:25:25,435 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2019-09-20 13:25:25,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 13:25:25,435 INFO L475 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2019-09-20 13:25:25,435 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-20 13:25:25,436 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2019-09-20 13:25:25,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-09-20 13:25:25,436 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:25:25,437 INFO L407 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 13:25:25,437 INFO L418 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:25:25,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:25:25,438 INFO L82 PathProgramCache]: Analyzing trace with hash 1432376145, now seen corresponding path program 1 times [2019-09-20 13:25:25,438 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-20 13:25:25,439 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:25:25,440 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:25:25,440 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:25:25,440 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-20 13:25:25,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:25:25,556 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-20 13:25:25,557 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-20 13:25:25,557 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-20 13:25:25,558 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 12 with the following transitions: [2019-09-20 13:25:25,560 INFO L207 CegarAbsIntRunner]: [0], [4], [11], [13], [19], [22], [24], [30], [31], [32], [34] [2019-09-20 13:25:25,589 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-20 13:25:25,589 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-20 13:25:25,644 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-09-20 13:25:25,716 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-09-20 13:25:25,719 INFO L272 AbstractInterpreter]: Visited 11 different actions 47 times. Merged at 2 different actions 12 times. Widened at 1 different actions 4 times. Performed 89 root evaluator evaluations with a maximum evaluation depth of 6. Performed 89 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 1 fixpoints after 1 different actions. Largest state had 3 variables. [2019-09-20 13:25:25,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:25:25,723 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-09-20 13:25:25,723 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-20 13:25:25,723 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 [2019-09-20 13:25:25,738 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:25:25,739 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-09-20 13:25:25,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:25:25,754 INFO L256 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 5 conjunts are in the unsatisfiable core [2019-09-20 13:25:25,760 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-20 13:25:25,808 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-20 13:25:25,809 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-20 13:25:25,859 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-20 13:25:25,864 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-09-20 13:25:25,864 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2019-09-20 13:25:25,865 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-09-20 13:25:25,865 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-20 13:25:25,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-20 13:25:25,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2019-09-20 13:25:25,867 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 5 states. [2019-09-20 13:25:25,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 13:25:25,888 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2019-09-20 13:25:25,889 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-20 13:25:25,889 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2019-09-20 13:25:25,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 13:25:25,890 INFO L225 Difference]: With dead ends: 13 [2019-09-20 13:25:25,890 INFO L226 Difference]: Without dead ends: 13 [2019-09-20 13:25:25,891 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2019-09-20 13:25:25,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2019-09-20 13:25:25,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2019-09-20 13:25:25,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2019-09-20 13:25:25,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2019-09-20 13:25:25,895 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2019-09-20 13:25:25,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 13:25:25,895 INFO L475 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2019-09-20 13:25:25,896 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-20 13:25:25,896 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2019-09-20 13:25:25,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-09-20 13:25:25,896 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:25:25,897 INFO L407 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 13:25:25,897 INFO L418 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:25:25,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:25:25,898 INFO L82 PathProgramCache]: Analyzing trace with hash 1490448798, now seen corresponding path program 2 times [2019-09-20 13:25:25,898 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-20 13:25:25,899 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:25:25,899 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:25:25,900 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:25:25,900 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-20 13:25:25,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:25:25,992 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-20 13:25:25,993 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-20 13:25:25,993 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-20 13:25:25,993 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-09-20 13:25:25,993 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-09-20 13:25:25,994 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-20 13:25:25,994 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 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-20 13:25:26,020 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-20 13:25:26,020 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-09-20 13:25:26,034 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-09-20 13:25:26,035 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-20 13:25:26,035 INFO L256 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 7 conjunts are in the unsatisfiable core [2019-09-20 13:25:26,037 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-20 13:25:26,065 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-20 13:25:26,065 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-20 13:25:26,118 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-20 13:25:26,121 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-09-20 13:25:26,122 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2019-09-20 13:25:26,122 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-09-20 13:25:26,122 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-20 13:25:26,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-20 13:25:26,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-09-20 13:25:26,124 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 6 states. [2019-09-20 13:25:26,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 13:25:26,151 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2019-09-20 13:25:26,151 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-20 13:25:26,152 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2019-09-20 13:25:26,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 13:25:26,153 INFO L225 Difference]: With dead ends: 14 [2019-09-20 13:25:26,153 INFO L226 Difference]: Without dead ends: 14 [2019-09-20 13:25:26,153 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-09-20 13:25:26,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2019-09-20 13:25:26,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2019-09-20 13:25:26,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-09-20 13:25:26,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2019-09-20 13:25:26,157 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2019-09-20 13:25:26,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 13:25:26,157 INFO L475 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2019-09-20 13:25:26,158 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-20 13:25:26,158 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2019-09-20 13:25:26,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-09-20 13:25:26,158 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:25:26,159 INFO L407 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 13:25:26,159 INFO L418 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:25:26,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:25:26,160 INFO L82 PathProgramCache]: Analyzing trace with hash -1004266255, now seen corresponding path program 3 times [2019-09-20 13:25:26,160 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-20 13:25:26,161 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:25:26,161 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-20 13:25:26,162 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:25:26,162 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-20 13:25:26,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:25:26,286 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-20 13:25:26,288 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-20 13:25:26,288 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-20 13:25:26,288 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-09-20 13:25:26,289 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-09-20 13:25:26,289 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-20 13:25:26,289 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 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-20 13:25:26,318 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-20 13:25:26,319 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-20 13:25:26,334 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-20 13:25:26,335 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-20 13:25:26,336 INFO L256 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 9 conjunts are in the unsatisfiable core [2019-09-20 13:25:26,337 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-20 13:25:26,368 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-20 13:25:26,368 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-20 13:25:26,451 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-20 13:25:26,456 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-09-20 13:25:26,459 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2019-09-20 13:25:26,459 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-09-20 13:25:26,459 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-09-20 13:25:26,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-09-20 13:25:26,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2019-09-20 13:25:26,460 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 7 states. [2019-09-20 13:25:26,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 13:25:26,518 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2019-09-20 13:25:26,519 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-20 13:25:26,519 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 13 [2019-09-20 13:25:26,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 13:25:26,520 INFO L225 Difference]: With dead ends: 15 [2019-09-20 13:25:26,520 INFO L226 Difference]: Without dead ends: 15 [2019-09-20 13:25:26,520 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2019-09-20 13:25:26,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2019-09-20 13:25:26,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2019-09-20 13:25:26,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-09-20 13:25:26,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2019-09-20 13:25:26,523 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2019-09-20 13:25:26,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 13:25:26,524 INFO L475 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2019-09-20 13:25:26,524 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-09-20 13:25:26,524 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2019-09-20 13:25:26,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-09-20 13:25:26,525 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:25:26,525 INFO L407 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 13:25:26,525 INFO L418 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:25:26,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:25:26,525 INFO L82 PathProgramCache]: Analyzing trace with hash -1031021570, now seen corresponding path program 4 times [2019-09-20 13:25:26,526 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-20 13:25:26,527 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:25:26,527 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-20 13:25:26,527 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:25:26,527 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-20 13:25:26,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:25:26,643 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-20 13:25:26,643 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-20 13:25:26,643 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-20 13:25:26,644 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-09-20 13:25:26,644 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-09-20 13:25:26,644 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-20 13:25:26,644 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 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-20 13:25:26,662 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:25:26,662 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-20 13:25:26,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:25:26,674 INFO L256 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 11 conjunts are in the unsatisfiable core [2019-09-20 13:25:26,676 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-20 13:25:26,711 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-20 13:25:26,711 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-20 13:25:26,808 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-20 13:25:26,811 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-09-20 13:25:26,812 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2019-09-20 13:25:26,812 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-09-20 13:25:26,812 INFO L454 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-09-20 13:25:26,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-09-20 13:25:26,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2019-09-20 13:25:26,813 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 8 states. [2019-09-20 13:25:26,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 13:25:26,867 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2019-09-20 13:25:26,868 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-20 13:25:26,868 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2019-09-20 13:25:26,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 13:25:26,869 INFO L225 Difference]: With dead ends: 16 [2019-09-20 13:25:26,869 INFO L226 Difference]: Without dead ends: 16 [2019-09-20 13:25:26,869 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2019-09-20 13:25:26,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2019-09-20 13:25:26,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2019-09-20 13:25:26,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-09-20 13:25:26,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2019-09-20 13:25:26,872 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2019-09-20 13:25:26,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 13:25:26,873 INFO L475 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2019-09-20 13:25:26,873 INFO L476 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-09-20 13:25:26,873 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2019-09-20 13:25:26,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-09-20 13:25:26,874 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:25:26,874 INFO L407 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 13:25:26,874 INFO L418 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:25:26,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:25:26,874 INFO L82 PathProgramCache]: Analyzing trace with hash -1860436335, now seen corresponding path program 5 times [2019-09-20 13:25:26,875 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-20 13:25:26,876 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:25:26,876 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:25:26,877 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:25:26,877 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-20 13:25:26,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:25:26,992 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-20 13:25:26,992 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-20 13:25:26,992 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-20 13:25:26,993 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-09-20 13:25:26,993 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-09-20 13:25:26,993 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-20 13:25:26,993 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-20 13:25:27,020 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-20 13:25:27,020 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-20 13:25:27,039 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-09-20 13:25:27,040 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-20 13:25:27,041 INFO L256 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 13 conjunts are in the unsatisfiable core [2019-09-20 13:25:27,042 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-20 13:25:27,063 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-20 13:25:27,063 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-20 13:25:27,177 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-20 13:25:27,181 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-09-20 13:25:27,182 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2019-09-20 13:25:27,182 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-09-20 13:25:27,182 INFO L454 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-09-20 13:25:27,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-09-20 13:25:27,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2019-09-20 13:25:27,184 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 9 states. [2019-09-20 13:25:27,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 13:25:27,257 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2019-09-20 13:25:27,260 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-09-20 13:25:27,261 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2019-09-20 13:25:27,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 13:25:27,261 INFO L225 Difference]: With dead ends: 17 [2019-09-20 13:25:27,262 INFO L226 Difference]: Without dead ends: 17 [2019-09-20 13:25:27,262 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2019-09-20 13:25:27,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-09-20 13:25:27,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2019-09-20 13:25:27,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-09-20 13:25:27,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2019-09-20 13:25:27,267 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2019-09-20 13:25:27,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 13:25:27,268 INFO L475 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2019-09-20 13:25:27,268 INFO L476 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-09-20 13:25:27,268 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2019-09-20 13:25:27,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-09-20 13:25:27,269 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:25:27,269 INFO L407 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 13:25:27,269 INFO L418 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:25:27,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:25:27,270 INFO L82 PathProgramCache]: Analyzing trace with hash -1802490274, now seen corresponding path program 6 times [2019-09-20 13:25:27,270 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-20 13:25:27,272 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:25:27,273 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-20 13:25:27,273 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:25:27,273 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-20 13:25:27,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-09-20 13:25:27,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-09-20 13:25:27,372 INFO L474 BasicCegarLoop]: Counterexample might be feasible [2019-09-20 13:25:27,397 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.09 01:25:27 BoogieIcfgContainer [2019-09-20 13:25:27,397 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-09-20 13:25:27,399 INFO L168 Benchmark]: Toolchain (without parser) took 3186.23 ms. Allocated memory was 136.3 MB in the beginning and 214.4 MB in the end (delta: 78.1 MB). Free memory was 83.7 MB in the beginning and 102.8 MB in the end (delta: -19.1 MB). Peak memory consumption was 59.0 MB. Max. memory is 7.1 GB. [2019-09-20 13:25:27,400 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 136.3 MB. Free memory is still 101.9 MB. There was no memory consumed. Max. memory is 7.1 GB. [2019-09-20 13:25:27,401 INFO L168 Benchmark]: CACSL2BoogieTranslator took 313.71 ms. Allocated memory is still 136.3 MB. Free memory was 83.3 MB in the beginning and 74.3 MB in the end (delta: 9.0 MB). Peak memory consumption was 9.0 MB. Max. memory is 7.1 GB. [2019-09-20 13:25:27,402 INFO L168 Benchmark]: Boogie Preprocessor took 118.15 ms. Allocated memory was 136.3 MB in the beginning and 197.7 MB in the end (delta: 61.3 MB). Free memory was 74.3 MB in the beginning and 175.2 MB in the end (delta: -100.8 MB). Peak memory consumption was 11.4 MB. Max. memory is 7.1 GB. [2019-09-20 13:25:27,403 INFO L168 Benchmark]: RCFGBuilder took 222.42 ms. Allocated memory is still 197.7 MB. Free memory was 175.2 MB in the beginning and 163.3 MB in the end (delta: 11.9 MB). Peak memory consumption was 11.9 MB. Max. memory is 7.1 GB. [2019-09-20 13:25:27,404 INFO L168 Benchmark]: TraceAbstraction took 2521.22 ms. Allocated memory was 197.7 MB in the beginning and 214.4 MB in the end (delta: 16.8 MB). Free memory was 163.3 MB in the beginning and 102.8 MB in the end (delta: 60.5 MB). Peak memory consumption was 77.2 MB. Max. memory is 7.1 GB. [2019-09-20 13:25:27,412 INFO L335 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 136.3 MB. Free memory is still 101.9 MB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 313.71 ms. Allocated memory is still 136.3 MB. Free memory was 83.3 MB in the beginning and 74.3 MB in the end (delta: 9.0 MB). Peak memory consumption was 9.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 118.15 ms. Allocated memory was 136.3 MB in the beginning and 197.7 MB in the end (delta: 61.3 MB). Free memory was 74.3 MB in the beginning and 175.2 MB in the end (delta: -100.8 MB). Peak memory consumption was 11.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 222.42 ms. Allocated memory is still 197.7 MB. Free memory was 175.2 MB in the beginning and 163.3 MB in the end (delta: 11.9 MB). Peak memory consumption was 11.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2521.22 ms. Allocated memory was 197.7 MB in the beginning and 214.4 MB in the end (delta: 16.8 MB). Free memory was 163.3 MB in the beginning and 102.8 MB in the end (delta: 60.5 MB). Peak memory consumption was 77.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 5]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L11] unsigned int x = 0; [L12] unsigned int y = 1; VAL [x=0, y=1] [L14] COND TRUE x < 6 [L15] x++ [L16] y *= 2 VAL [x=1, y=2] [L14] COND TRUE x < 6 [L15] x++ [L16] y *= 2 VAL [x=2, y=4] [L14] COND TRUE x < 6 [L15] x++ [L16] y *= 2 VAL [x=3, y=8] [L14] COND TRUE x < 6 [L15] x++ [L16] y *= 2 VAL [x=4, y=16] [L14] COND TRUE x < 6 [L15] x++ [L16] y *= 2 VAL [x=5, y=32] [L14] COND TRUE x < 6 [L15] x++ [L16] y *= 2 VAL [x=6, y=64] [L14] COND FALSE !(x < 6) VAL [x=6, y=64] [L19] CALL __VERIFIER_assert(y != 64) VAL [\old(cond)=0] [L4] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L5] __VERIFIER_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 17 locations, 1 error locations. UNSAFE Result, 2.4s OverallTime, 7 OverallIterations, 6 TraceHistogramMax, 0.3s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 66 SDtfs, 0 SDslu, 190 SDs, 0 SdLazy, 137 SolverSat, 15 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 158 GetRequests, 107 SyntacticMatches, 5 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 1.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=17occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.1s AbstIntTime, 1 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 6 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.3s InterpolantComputationTime, 156 NumberOfCodeBlocks, 156 NumberOfCodeBlocksAsserted, 17 NumberOfCheckSat, 189 ConstructedInterpolants, 0 QuantifiedInterpolants, 6945 SizeOfPredicates, 5 NumberOfNonLiveVariables, 195 ConjunctsInSsa, 45 ConjunctsInUnsatCore, 16 InterpolantComputations, 1 PerfectInterpolantSequences, 0/105 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...