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_2-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-c6af20d [2019-09-03 20:51:19,213 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-03 20:51:19,215 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-03 20:51:19,226 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-03 20:51:19,235 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-03 20:51:19,236 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-03 20:51:19,237 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-03 20:51:19,238 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-03 20:51:19,239 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-03 20:51:19,240 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-03 20:51:19,242 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-03 20:51:19,244 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-03 20:51:19,246 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-03 20:51:19,247 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-03 20:51:19,248 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-03 20:51:19,248 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-03 20:51:19,251 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-03 20:51:19,254 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-09-03 20:51:19,255 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-09-03 20:51:19,256 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-09-03 20:51:19,257 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-09-03 20:51:19,258 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-09-03 20:51:19,258 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-09-03 20:51:19,259 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-09-03 20:51:19,259 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-09-03 20:51:19,259 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-03 20:51:19,260 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-03 20:51:19,261 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-03 20:51:19,262 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 [2019-09-03 20:51:19,277 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-03 20:51:19,277 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-03 20:51:19,277 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-03 20:51:19,278 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-03 20:51:19,278 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-03 20:51:19,279 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-03 20:51:19,279 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-03 20:51:19,279 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-03 20:51:19,279 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-03 20:51:19,279 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-03 20:51:19,280 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-03 20:51:19,280 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-03 20:51:19,280 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-03 20:51:19,281 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-03 20:51:19,281 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-03 20:51:19,281 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-03 20:51:19,281 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-03 20:51:19,281 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-03 20:51:19,282 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-03 20:51:19,282 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-03 20:51:19,282 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-03 20:51:19,282 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-03 20:51:19,282 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-03 20:51:19,283 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-03 20:51:19,283 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-03 20:51:19,283 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-03 20:51:19,283 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-03 20:51:19,283 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-03 20:51:19,284 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-03 20:51:19,284 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-03 20:51:19,312 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-03 20:51:19,324 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-03 20:51:19,327 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-03 20:51:19,329 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-03 20:51:19,329 INFO L275 PluginConnector]: CDTParser initialized [2019-09-03 20:51:19,330 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/underapprox_2-1.c [2019-09-03 20:51:19,389 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7f82c02fa/a3e30d5725e24bb7b760214cf52e22b5/FLAG9eff086c2 [2019-09-03 20:51:19,813 INFO L306 CDTParser]: Found 1 translation units. [2019-09-03 20:51:19,814 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/underapprox_2-1.c [2019-09-03 20:51:19,820 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7f82c02fa/a3e30d5725e24bb7b760214cf52e22b5/FLAG9eff086c2 [2019-09-03 20:51:20,212 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7f82c02fa/a3e30d5725e24bb7b760214cf52e22b5 [2019-09-03 20:51:20,223 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-03 20:51:20,225 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-03 20:51:20,226 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-03 20:51:20,226 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-03 20:51:20,229 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-03 20:51:20,230 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.09 08:51:20" (1/1) ... [2019-09-03 20:51:20,233 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5748c03b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:51:20, skipping insertion in model container [2019-09-03 20:51:20,234 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.09 08:51:20" (1/1) ... [2019-09-03 20:51:20,241 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-03 20:51:20,256 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-03 20:51:20,439 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-03 20:51:20,442 INFO L188 MainTranslator]: Completed pre-run [2019-09-03 20:51:20,456 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-03 20:51:20,470 INFO L192 MainTranslator]: Completed translation [2019-09-03 20:51:20,471 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:51:20 WrapperNode [2019-09-03 20:51:20,471 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-03 20:51:20,472 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-03 20:51:20,472 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-03 20:51:20,472 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-03 20:51:20,568 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:51:20" (1/1) ... [2019-09-03 20:51:20,568 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:51:20" (1/1) ... [2019-09-03 20:51:20,573 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:51:20" (1/1) ... [2019-09-03 20:51:20,574 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:51:20" (1/1) ... [2019-09-03 20:51:20,577 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:51:20" (1/1) ... [2019-09-03 20:51:20,580 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:51:20" (1/1) ... [2019-09-03 20:51:20,581 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:51:20" (1/1) ... [2019-09-03 20:51:20,582 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-03 20:51:20,582 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-03 20:51:20,582 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-03 20:51:20,583 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-03 20:51:20,583 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:51:20" (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 [2019-09-03 20:51:20,638 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-03 20:51:20,638 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-03 20:51:20,639 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-09-03 20:51:20,639 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-03 20:51:20,639 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-03 20:51:20,639 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-09-03 20:51:20,639 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-03 20:51:20,639 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-03 20:51:20,639 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-03 20:51:20,781 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-03 20:51:20,782 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-03 20:51:20,783 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.09 08:51:20 BoogieIcfgContainer [2019-09-03 20:51:20,783 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-03 20:51:20,784 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-03 20:51:20,784 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-03 20:51:20,787 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-03 20:51:20,787 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.09 08:51:20" (1/3) ... [2019-09-03 20:51:20,788 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a028a27 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.09 08:51:20, skipping insertion in model container [2019-09-03 20:51:20,788 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:51:20" (2/3) ... [2019-09-03 20:51:20,789 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a028a27 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.09 08:51:20, skipping insertion in model container [2019-09-03 20:51:20,789 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.09 08:51:20" (3/3) ... [2019-09-03 20:51:20,790 INFO L109 eAbstractionObserver]: Analyzing ICFG underapprox_2-1.c [2019-09-03 20:51:20,799 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-03 20:51:20,804 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-03 20:51:20,820 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-03 20:51:20,847 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-03 20:51:20,847 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-03 20:51:20,848 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-03 20:51:20,848 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-03 20:51:20,848 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-03 20:51:20,848 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-03 20:51:20,848 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-03 20:51:20,848 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-03 20:51:20,863 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2019-09-03 20:51:20,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-09-03 20:51:20,870 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:51:20,871 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:51:20,874 INFO L418 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:51:20,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:51:20,879 INFO L82 PathProgramCache]: Analyzing trace with hash 1846144830, now seen corresponding path program 1 times [2019-09-03 20:51:20,880 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-03 20:51:20,919 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:51:20,919 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:51:20,919 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:51:20,919 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-03 20:51:20,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:51:21,123 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:51:21,130 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-03 20:51:21,130 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-03 20:51:21,130 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-03 20:51:21,135 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-03 20:51:21,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-03 20:51:21,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-03 20:51:21,154 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 5 states. [2019-09-03 20:51:21,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:51:21,201 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2019-09-03 20:51:21,201 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-03 20:51:21,203 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2019-09-03 20:51:21,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:51:21,211 INFO L225 Difference]: With dead ends: 18 [2019-09-03 20:51:21,212 INFO L226 Difference]: Without dead ends: 12 [2019-09-03 20:51:21,214 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-03 20:51:21,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2019-09-03 20:51:21,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2019-09-03 20:51:21,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2019-09-03 20:51:21,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2019-09-03 20:51:21,254 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2019-09-03 20:51:21,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:51:21,255 INFO L475 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2019-09-03 20:51:21,255 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-03 20:51:21,255 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2019-09-03 20:51:21,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-09-03 20:51:21,256 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:51:21,256 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:51:21,256 INFO L418 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:51:21,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:51:21,257 INFO L82 PathProgramCache]: Analyzing trace with hash 1432376145, now seen corresponding path program 1 times [2019-09-03 20:51:21,257 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-03 20:51:21,258 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:51:21,258 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:51:21,260 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:51:21,260 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-03 20:51:21,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:51:21,392 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:51:21,394 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 20:51:21,394 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-03 20:51:21,395 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 12 with the following transitions: [2019-09-03 20:51:21,396 INFO L207 CegarAbsIntRunner]: [0], [4], [11], [13], [19], [22], [24], [30], [31], [32], [34] [2019-09-03 20:51:21,426 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-03 20:51:21,426 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-03 20:51:21,480 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-09-03 20:51:21,548 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-09-03 20:51:21,551 INFO L272 AbstractInterpreter]: Visited 11 different actions 41 times. Merged at 2 different actions 10 times. Widened at 1 different actions 3 times. Performed 74 root evaluator evaluations with a maximum evaluation depth of 6. Performed 74 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 1 fixpoints after 1 different actions. Largest state had 3 variables. [2019-09-03 20:51:21,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:51:21,555 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-09-03 20:51:21,555 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 20:51:21,556 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 [2019-09-03 20:51:21,582 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:51:21,582 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-09-03 20:51:21,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:51:21,596 INFO L256 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 11 conjunts are in the unsatisfiable core [2019-09-03 20:51:21,601 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:51:21,639 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:51:21,639 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-03 20:51:21,714 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:51:21,720 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-09-03 20:51:21,721 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 6] total 9 [2019-09-03 20:51:21,721 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-09-03 20:51:21,722 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-09-03 20:51:21,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-09-03 20:51:21,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2019-09-03 20:51:21,723 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 7 states. [2019-09-03 20:51:21,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:51:21,759 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2019-09-03 20:51:21,759 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-03 20:51:21,760 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2019-09-03 20:51:21,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:51:21,760 INFO L225 Difference]: With dead ends: 13 [2019-09-03 20:51:21,760 INFO L226 Difference]: Without dead ends: 13 [2019-09-03 20:51:21,762 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2019-09-03 20:51:21,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2019-09-03 20:51:21,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2019-09-03 20:51:21,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2019-09-03 20:51:21,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2019-09-03 20:51:21,767 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2019-09-03 20:51:21,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:51:21,769 INFO L475 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2019-09-03 20:51:21,770 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-09-03 20:51:21,770 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2019-09-03 20:51:21,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-09-03 20:51:21,771 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:51:21,771 INFO L399 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:51:21,772 INFO L418 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:51:21,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:51:21,772 INFO L82 PathProgramCache]: Analyzing trace with hash 1490448798, now seen corresponding path program 2 times [2019-09-03 20:51:21,772 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-03 20:51:21,775 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:51:21,775 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:51:21,775 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:51:21,775 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-03 20:51:21,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:51:21,921 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:51:21,922 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 20:51:21,922 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-03 20:51:21,922 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-09-03 20:51:21,922 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-09-03 20:51:21,923 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 20:51:21,923 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) [2019-09-03 20:51:21,947 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-03 20:51:21,947 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 20:51:21,959 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-09-03 20:51:21,960 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:51:21,960 INFO L256 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 13 conjunts are in the unsatisfiable core [2019-09-03 20:51:21,962 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:51:21,992 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:51:21,992 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-03 20:51:22,062 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:51:22,065 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-09-03 20:51:22,066 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 7] total 11 [2019-09-03 20:51:22,066 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-09-03 20:51:22,066 INFO L454 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-09-03 20:51:22,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-09-03 20:51:22,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2019-09-03 20:51:22,067 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 8 states. [2019-09-03 20:51:22,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:51:22,111 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2019-09-03 20:51:22,113 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-03 20:51:22,113 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-09-03 20:51:22,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:51:22,114 INFO L225 Difference]: With dead ends: 14 [2019-09-03 20:51:22,114 INFO L226 Difference]: Without dead ends: 14 [2019-09-03 20:51:22,115 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2019-09-03 20:51:22,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2019-09-03 20:51:22,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2019-09-03 20:51:22,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-09-03 20:51:22,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2019-09-03 20:51:22,121 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2019-09-03 20:51:22,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:51:22,121 INFO L475 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2019-09-03 20:51:22,122 INFO L476 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-09-03 20:51:22,122 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2019-09-03 20:51:22,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-09-03 20:51:22,122 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:51:22,122 INFO L399 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:51:22,123 INFO L418 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:51:22,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:51:22,123 INFO L82 PathProgramCache]: Analyzing trace with hash -1004266255, now seen corresponding path program 3 times [2019-09-03 20:51:22,123 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-03 20:51:22,124 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:51:22,124 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:51:22,124 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:51:22,124 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-03 20:51:22,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:51:22,251 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:51:22,251 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 20:51:22,251 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-03 20:51:22,251 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-09-03 20:51:22,252 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-09-03 20:51:22,252 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 20:51:22,252 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) [2019-09-03 20:51:22,277 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-03 20:51:22,278 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 [2019-09-03 20:51:22,296 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-03 20:51:22,296 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:51:22,297 INFO L256 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 15 conjunts are in the unsatisfiable core [2019-09-03 20:51:22,298 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:51:22,333 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:51:22,333 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-03 20:51:22,425 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:51:22,430 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-09-03 20:51:22,431 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 8] total 13 [2019-09-03 20:51:22,431 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-09-03 20:51:22,431 INFO L454 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-09-03 20:51:22,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-09-03 20:51:22,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2019-09-03 20:51:22,432 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 9 states. [2019-09-03 20:51:22,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:51:22,475 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2019-09-03 20:51:22,475 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-03 20:51:22,476 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-09-03 20:51:22,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:51:22,476 INFO L225 Difference]: With dead ends: 15 [2019-09-03 20:51:22,477 INFO L226 Difference]: Without dead ends: 15 [2019-09-03 20:51:22,477 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2019-09-03 20:51:22,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2019-09-03 20:51:22,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2019-09-03 20:51:22,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-09-03 20:51:22,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2019-09-03 20:51:22,480 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2019-09-03 20:51:22,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:51:22,481 INFO L475 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2019-09-03 20:51:22,481 INFO L476 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-09-03 20:51:22,481 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2019-09-03 20:51:22,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-09-03 20:51:22,481 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:51:22,482 INFO L399 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:51:22,482 INFO L418 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:51:22,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:51:22,482 INFO L82 PathProgramCache]: Analyzing trace with hash -1031021570, now seen corresponding path program 4 times [2019-09-03 20:51:22,482 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-03 20:51:22,483 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:51:22,484 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:51:22,484 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:51:22,484 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-03 20:51:22,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:51:22,624 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:51:22,624 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 20:51:22,625 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-03 20:51:22,625 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-09-03 20:51:22,625 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-09-03 20:51:22,625 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 20:51:22,625 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) [2019-09-03 20:51:22,647 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:51:22,647 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 [2019-09-03 20:51:22,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:51:22,658 INFO L256 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2019-09-03 20:51:22,660 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:51:22,691 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:51:22,691 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-03 20:51:22,812 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:51:22,816 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-09-03 20:51:22,816 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 9] total 15 [2019-09-03 20:51:22,816 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-09-03 20:51:22,816 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-09-03 20:51:22,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-09-03 20:51:22,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2019-09-03 20:51:22,818 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 10 states. [2019-09-03 20:51:22,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:51:22,860 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2019-09-03 20:51:22,860 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-03 20:51:22,860 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-09-03 20:51:22,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:51:22,861 INFO L225 Difference]: With dead ends: 16 [2019-09-03 20:51:22,861 INFO L226 Difference]: Without dead ends: 16 [2019-09-03 20:51:22,862 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2019-09-03 20:51:22,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2019-09-03 20:51:22,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2019-09-03 20:51:22,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-09-03 20:51:22,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2019-09-03 20:51:22,865 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2019-09-03 20:51:22,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:51:22,865 INFO L475 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2019-09-03 20:51:22,865 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-09-03 20:51:22,865 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2019-09-03 20:51:22,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-09-03 20:51:22,866 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:51:22,866 INFO L399 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:51:22,866 INFO L418 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:51:22,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:51:22,867 INFO L82 PathProgramCache]: Analyzing trace with hash -1860436335, now seen corresponding path program 5 times [2019-09-03 20:51:22,867 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-03 20:51:22,868 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:51:22,868 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:51:22,868 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:51:22,868 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-03 20:51:22,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:51:23,010 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:51:23,011 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 20:51:23,012 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-03 20:51:23,012 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-09-03 20:51:23,012 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-09-03 20:51:23,013 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 20:51:23,013 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) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 20:51:23,028 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-03 20:51:23,028 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-09-03 20:51:23,044 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-09-03 20:51:23,044 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:51:23,045 INFO L256 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 19 conjunts are in the unsatisfiable core [2019-09-03 20:51:23,046 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:51:23,070 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:51:23,070 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-03 20:51:23,223 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:51:23,228 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-09-03 20:51:23,228 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 10] total 17 [2019-09-03 20:51:23,229 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-09-03 20:51:23,229 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-09-03 20:51:23,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-09-03 20:51:23,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2019-09-03 20:51:23,230 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 11 states. [2019-09-03 20:51:23,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:51:23,296 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2019-09-03 20:51:23,297 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-09-03 20:51:23,297 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2019-09-03 20:51:23,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:51:23,298 INFO L225 Difference]: With dead ends: 17 [2019-09-03 20:51:23,298 INFO L226 Difference]: Without dead ends: 17 [2019-09-03 20:51:23,299 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2019-09-03 20:51:23,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-09-03 20:51:23,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2019-09-03 20:51:23,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-09-03 20:51:23,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2019-09-03 20:51:23,302 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2019-09-03 20:51:23,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:51:23,302 INFO L475 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2019-09-03 20:51:23,303 INFO L476 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-09-03 20:51:23,303 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2019-09-03 20:51:23,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-09-03 20:51:23,303 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:51:23,304 INFO L399 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:51:23,304 INFO L418 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:51:23,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:51:23,304 INFO L82 PathProgramCache]: Analyzing trace with hash -1802490274, now seen corresponding path program 6 times [2019-09-03 20:51:23,305 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-03 20:51:23,306 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:51:23,306 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:51:23,306 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:51:23,306 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-03 20:51:23,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-09-03 20:51:23,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-09-03 20:51:23,347 INFO L466 BasicCegarLoop]: Counterexample might be feasible [2019-09-03 20:51:23,372 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.09 08:51:23 BoogieIcfgContainer [2019-09-03 20:51:23,373 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-09-03 20:51:23,377 INFO L168 Benchmark]: Toolchain (without parser) took 3149.86 ms. Allocated memory was 138.4 MB in the beginning and 229.6 MB in the end (delta: 91.2 MB). Free memory was 89.0 MB in the beginning and 76.2 MB in the end (delta: 12.8 MB). Peak memory consumption was 104.0 MB. Max. memory is 7.1 GB. [2019-09-03 20:51:23,379 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 138.4 MB. Free memory was 107.6 MB in the beginning and 107.4 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2019-09-03 20:51:23,380 INFO L168 Benchmark]: CACSL2BoogieTranslator took 245.52 ms. Allocated memory is still 138.4 MB. Free memory was 88.8 MB in the beginning and 79.6 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.1 MB. Max. memory is 7.1 GB. [2019-09-03 20:51:23,382 INFO L168 Benchmark]: Boogie Preprocessor took 110.42 ms. Allocated memory was 138.4 MB in the beginning and 200.8 MB in the end (delta: 62.4 MB). Free memory was 79.6 MB in the beginning and 178.8 MB in the end (delta: -99.2 MB). Peak memory consumption was 12.4 MB. Max. memory is 7.1 GB. [2019-09-03 20:51:23,383 INFO L168 Benchmark]: RCFGBuilder took 200.78 ms. Allocated memory is still 200.8 MB. Free memory was 178.8 MB in the beginning and 168.2 MB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. [2019-09-03 20:51:23,390 INFO L168 Benchmark]: TraceAbstraction took 2589.00 ms. Allocated memory was 200.8 MB in the beginning and 229.6 MB in the end (delta: 28.8 MB). Free memory was 168.2 MB in the beginning and 76.2 MB in the end (delta: 92.0 MB). Peak memory consumption was 120.8 MB. Max. memory is 7.1 GB. [2019-09-03 20:51:23,397 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 138.4 MB. Free memory was 107.6 MB in the beginning and 107.4 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 245.52 ms. Allocated memory is still 138.4 MB. Free memory was 88.8 MB in the beginning and 79.6 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 110.42 ms. Allocated memory was 138.4 MB in the beginning and 200.8 MB in the end (delta: 62.4 MB). Free memory was 79.6 MB in the beginning and 178.8 MB in the end (delta: -99.2 MB). Peak memory consumption was 12.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 200.78 ms. Allocated memory is still 200.8 MB. Free memory was 178.8 MB in the beginning and 168.2 MB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2589.00 ms. Allocated memory was 200.8 MB in the beginning and 229.6 MB in the end (delta: 28.8 MB). Free memory was 168.2 MB in the beginning and 76.2 MB in the end (delta: 92.0 MB). Peak memory consumption was 120.8 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(x != 6) 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, 2.5s OverallTime, 7 OverallIterations, 6 TraceHistogramMax, 0.3s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 66 SDtfs, 1 SDslu, 248 SDs, 0 SdLazy, 191 SolverSat, 16 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 176 GetRequests, 97 SyntacticMatches, 21 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 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, 1.4s InterpolantComputationTime, 156 NumberOfCodeBlocks, 156 NumberOfCodeBlocksAsserted, 17 NumberOfCheckSat, 189 ConstructedInterpolants, 0 QuantifiedInterpolants, 8269 SizeOfPredicates, 0 NumberOfNonLiveVariables, 195 ConjunctsInSsa, 75 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...