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/nla-digbench/ps2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-efa34d5 [2019-09-16 17:04:06,352 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-16 17:04:06,354 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-16 17:04:06,366 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-09-16 17:04:06,366 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-09-16 17:04:06,367 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-09-16 17:04:06,368 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-09-16 17:04:06,370 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-09-16 17:04:06,372 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-09-16 17:04:06,373 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-09-16 17:04:06,374 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-09-16 17:04:06,375 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-09-16 17:04:06,375 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-16 17:04:06,376 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-16 17:04:06,377 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-16 17:04:06,378 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-16 17:04:06,379 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-16 17:04:06,380 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-16 17:04:06,381 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-16 17:04:06,383 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-16 17:04:06,384 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-16 17:04:06,386 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-16 17:04:06,387 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-16 17:04:06,388 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-16 17:04:06,393 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-16 17:04:06,396 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-09-16 17:04:06,397 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-09-16 17:04:06,400 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-09-16 17:04:06,400 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-09-16 17:04:06,403 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-09-16 17:04:06,403 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-09-16 17:04:06,404 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-09-16 17:04:06,404 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-09-16 17:04:06,405 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-16 17:04:06,407 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-16 17:04:06,409 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-16 17:04:06,410 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 [2019-09-16 17:04:06,433 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-16 17:04:06,433 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-16 17:04:06,434 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-16 17:04:06,434 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-16 17:04:06,435 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-16 17:04:06,435 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-16 17:04:06,435 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-16 17:04:06,435 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-16 17:04:06,436 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-16 17:04:06,436 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-16 17:04:06,438 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-16 17:04:06,438 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-16 17:04:06,439 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-16 17:04:06,439 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-16 17:04:06,439 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-16 17:04:06,439 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-16 17:04:06,439 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-16 17:04:06,440 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-16 17:04:06,440 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-16 17:04:06,440 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-16 17:04:06,440 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-16 17:04:06,441 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-16 17:04:06,441 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-16 17:04:06,441 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-16 17:04:06,441 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-16 17:04:06,442 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-16 17:04:06,442 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-16 17:04:06,442 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-16 17:04:06,443 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-16 17:04:06,443 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-16 17:04:06,478 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-16 17:04:06,491 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-16 17:04:06,495 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-16 17:04:06,497 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-16 17:04:06,497 INFO L275 PluginConnector]: CDTParser initialized [2019-09-16 17:04:06,498 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/ps2.c [2019-09-16 17:04:06,569 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8180ea19a/acb0a1eab071437d816a6a40178f2bbd/FLAG9991cd9ac [2019-09-16 17:04:07,024 INFO L306 CDTParser]: Found 1 translation units. [2019-09-16 17:04:07,025 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/ps2.c [2019-09-16 17:04:07,030 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8180ea19a/acb0a1eab071437d816a6a40178f2bbd/FLAG9991cd9ac [2019-09-16 17:04:07,378 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8180ea19a/acb0a1eab071437d816a6a40178f2bbd [2019-09-16 17:04:07,388 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-16 17:04:07,390 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-16 17:04:07,391 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-16 17:04:07,391 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-16 17:04:07,394 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-16 17:04:07,395 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.09 05:04:07" (1/1) ... [2019-09-16 17:04:07,398 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5e91a4b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 05:04:07, skipping insertion in model container [2019-09-16 17:04:07,398 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.09 05:04:07" (1/1) ... [2019-09-16 17:04:07,406 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-16 17:04:07,423 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-16 17:04:07,620 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-16 17:04:07,624 INFO L188 MainTranslator]: Completed pre-run [2019-09-16 17:04:07,642 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-16 17:04:07,652 INFO L192 MainTranslator]: Completed translation [2019-09-16 17:04:07,653 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 05:04:07 WrapperNode [2019-09-16 17:04:07,653 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-16 17:04:07,654 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-16 17:04:07,654 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-16 17:04:07,654 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-16 17:04:07,666 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 05:04:07" (1/1) ... [2019-09-16 17:04:07,666 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 05:04:07" (1/1) ... [2019-09-16 17:04:07,753 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 05:04:07" (1/1) ... [2019-09-16 17:04:07,754 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 05:04:07" (1/1) ... [2019-09-16 17:04:07,757 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 05:04:07" (1/1) ... [2019-09-16 17:04:07,763 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 05:04:07" (1/1) ... [2019-09-16 17:04:07,764 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 05:04:07" (1/1) ... [2019-09-16 17:04:07,770 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-16 17:04:07,771 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-16 17:04:07,771 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-16 17:04:07,771 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-16 17:04:07,772 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 05:04:07" (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 [2019-09-16 17:04:07,825 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-16 17:04:07,825 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-16 17:04:07,825 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-09-16 17:04:07,825 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-16 17:04:07,825 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-16 17:04:07,825 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-16 17:04:07,826 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-09-16 17:04:07,826 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-09-16 17:04:07,826 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-16 17:04:07,826 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-16 17:04:07,826 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-16 17:04:07,969 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-16 17:04:07,969 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-16 17:04:07,970 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.09 05:04:07 BoogieIcfgContainer [2019-09-16 17:04:07,971 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-16 17:04:07,972 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-16 17:04:07,972 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-16 17:04:07,974 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-16 17:04:07,975 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.09 05:04:07" (1/3) ... [2019-09-16 17:04:07,975 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6519b41 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.09 05:04:07, skipping insertion in model container [2019-09-16 17:04:07,975 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 05:04:07" (2/3) ... [2019-09-16 17:04:07,976 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6519b41 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.09 05:04:07, skipping insertion in model container [2019-09-16 17:04:07,976 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.09 05:04:07" (3/3) ... [2019-09-16 17:04:07,978 INFO L109 eAbstractionObserver]: Analyzing ICFG ps2.c [2019-09-16 17:04:07,986 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-16 17:04:07,992 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-16 17:04:08,005 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-16 17:04:08,031 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-16 17:04:08,031 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-16 17:04:08,031 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-16 17:04:08,032 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-16 17:04:08,032 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-16 17:04:08,032 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-16 17:04:08,032 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-16 17:04:08,032 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-16 17:04:08,045 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2019-09-16 17:04:08,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-09-16 17:04:08,054 INFO L399 BasicCegarLoop]: Found error trace [2019-09-16 17:04:08,055 INFO L407 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-16 17:04:08,057 INFO L418 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-16 17:04:08,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-16 17:04:08,063 INFO L82 PathProgramCache]: Analyzing trace with hash 1712389503, now seen corresponding path program 1 times [2019-09-16 17:04:08,065 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-16 17:04:08,106 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 17:04:08,106 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-16 17:04:08,106 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 17:04:08,106 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-16 17:04:08,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 17:04:08,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-16 17:04:08,164 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-16 17:04:08,164 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-09-16 17:04:08,164 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-16 17:04:08,168 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-09-16 17:04:08,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-09-16 17:04:08,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-16 17:04:08,180 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 2 states. [2019-09-16 17:04:08,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-16 17:04:08,194 INFO L93 Difference]: Finished difference Result 20 states and 21 transitions. [2019-09-16 17:04:08,194 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-09-16 17:04:08,195 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2019-09-16 17:04:08,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-16 17:04:08,202 INFO L225 Difference]: With dead ends: 20 [2019-09-16 17:04:08,203 INFO L226 Difference]: Without dead ends: 15 [2019-09-16 17:04:08,204 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-16 17:04:08,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2019-09-16 17:04:08,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2019-09-16 17:04:08,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-09-16 17:04:08,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2019-09-16 17:04:08,233 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 10 [2019-09-16 17:04:08,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-16 17:04:08,234 INFO L475 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2019-09-16 17:04:08,234 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-09-16 17:04:08,234 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2019-09-16 17:04:08,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-09-16 17:04:08,235 INFO L399 BasicCegarLoop]: Found error trace [2019-09-16 17:04:08,235 INFO L407 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-16 17:04:08,236 INFO L418 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-16 17:04:08,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-16 17:04:08,236 INFO L82 PathProgramCache]: Analyzing trace with hash 1704941753, now seen corresponding path program 1 times [2019-09-16 17:04:08,236 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-16 17:04:08,238 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 17:04:08,238 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-16 17:04:08,238 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 17:04:08,238 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-16 17:04:08,244 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-16 17:04:08,244 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-16 17:04:08,244 INFO L170 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-16 17:04:08,264 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-16 17:04:08,265 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2019-09-16 17:04:08,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 17:04:08,277 INFO L195 CegarAbsIntRunner]: Skipping current iteration for AI because the path program does not contain any loops [2019-09-16 17:04:08,277 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-09-16 17:04:08,277 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-16 17:04:08,278 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 [2019-09-16 17:04:08,291 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-16 17:04:08,292 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-09-16 17:04:08,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 17:04:08,319 INFO L256 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 10 conjunts are in the unsatisfiable core [2019-09-16 17:04:08,325 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-16 17:04:08,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-16 17:04:08,453 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-16 17:04:08,549 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-16 17:04:08,553 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-09-16 17:04:08,553 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2019-09-16 17:04:08,554 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-16 17:04:08,555 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-16 17:04:08,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-16 17:04:08,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-09-16 17:04:08,556 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 5 states. [2019-09-16 17:04:08,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-16 17:04:08,661 INFO L93 Difference]: Finished difference Result 23 states and 25 transitions. [2019-09-16 17:04:08,668 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-16 17:04:08,668 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2019-09-16 17:04:08,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-16 17:04:08,670 INFO L225 Difference]: With dead ends: 23 [2019-09-16 17:04:08,670 INFO L226 Difference]: Without dead ends: 22 [2019-09-16 17:04:08,671 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-09-16 17:04:08,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-09-16 17:04:08,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2019-09-16 17:04:08,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-09-16 17:04:08,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2019-09-16 17:04:08,683 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 10 [2019-09-16 17:04:08,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-16 17:04:08,685 INFO L475 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2019-09-16 17:04:08,685 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-16 17:04:08,685 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2019-09-16 17:04:08,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-09-16 17:04:08,687 INFO L399 BasicCegarLoop]: Found error trace [2019-09-16 17:04:08,687 INFO L407 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-16 17:04:08,688 INFO L418 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-16 17:04:08,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-16 17:04:08,688 INFO L82 PathProgramCache]: Analyzing trace with hash 241116926, now seen corresponding path program 1 times [2019-09-16 17:04:08,689 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-16 17:04:08,693 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 17:04:08,693 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-16 17:04:08,693 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 17:04:08,693 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-16 17:04:08,701 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-16 17:04:08,701 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-16 17:04:08,703 INFO L170 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-16 17:04:08,719 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-16 17:04:08,720 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2019-09-16 17:04:08,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 17:04:08,732 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 18 with the following transitions: [2019-09-16 17:04:08,734 INFO L207 CegarAbsIntRunner]: [0], [4], [13], [19], [26], [29], [31], [34], [36], [37], [38], [39], [41], [42] [2019-09-16 17:04:08,772 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-16 17:04:08,772 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-16 17:04:08,958 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-09-16 17:04:08,960 INFO L272 AbstractInterpreter]: Visited 13 different actions 13 times. Never merged. Never widened. Performed 12 root evaluator evaluations with a maximum evaluation depth of 9. Performed 12 inverse root evaluator evaluations with a maximum inverse evaluation depth of 9. Never found a fixpoint. Largest state had 5 variables. [2019-09-16 17:04:08,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-16 17:04:08,967 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-09-16 17:04:08,967 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-16 17:04:08,967 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) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-16 17:04:08,980 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-16 17:04:08,981 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-09-16 17:04:08,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 17:04:09,001 INFO L256 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 19 conjunts are in the unsatisfiable core [2019-09-16 17:04:09,003 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-16 17:04:09,076 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-16 17:04:09,076 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-16 17:04:09,179 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-16 17:04:09,184 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-16 17:04:09,223 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-16 17:04:09,228 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-16 17:04:09,229 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 11 [2019-09-16 17:04:09,229 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-09-16 17:04:09,230 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-09-16 17:04:09,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-09-16 17:04:09,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2019-09-16 17:04:09,231 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 11 states. [2019-09-16 17:04:09,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-16 17:04:09,325 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2019-09-16 17:04:09,325 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-16 17:04:09,325 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 17 [2019-09-16 17:04:09,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-16 17:04:09,326 INFO L225 Difference]: With dead ends: 24 [2019-09-16 17:04:09,326 INFO L226 Difference]: Without dead ends: 0 [2019-09-16 17:04:09,327 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2019-09-16 17:04:09,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-09-16 17:04:09,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-09-16 17:04:09,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-09-16 17:04:09,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-09-16 17:04:09,328 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 17 [2019-09-16 17:04:09,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-16 17:04:09,328 INFO L475 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-09-16 17:04:09,329 INFO L476 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-09-16 17:04:09,329 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-09-16 17:04:09,329 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-09-16 17:04:09,344 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.09 05:04:09 BoogieIcfgContainer [2019-09-16 17:04:09,344 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-09-16 17:04:09,347 INFO L168 Benchmark]: Toolchain (without parser) took 1956.14 ms. Allocated memory was 132.6 MB in the beginning and 223.3 MB in the end (delta: 90.7 MB). Free memory was 87.2 MB in the beginning and 192.3 MB in the end (delta: -105.1 MB). Peak memory consumption was 86.1 MB. Max. memory is 7.1 GB. [2019-09-16 17:04:09,348 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 132.6 MB. Free memory was 105.6 MB in the beginning and 105.3 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. [2019-09-16 17:04:09,349 INFO L168 Benchmark]: CACSL2BoogieTranslator took 262.69 ms. Allocated memory is still 132.6 MB. Free memory was 87.0 MB in the beginning and 77.7 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. [2019-09-16 17:04:09,350 INFO L168 Benchmark]: Boogie Preprocessor took 116.82 ms. Allocated memory was 132.6 MB in the beginning and 199.2 MB in the end (delta: 66.6 MB). Free memory was 77.7 MB in the beginning and 175.8 MB in the end (delta: -98.1 MB). Peak memory consumption was 16.4 MB. Max. memory is 7.1 GB. [2019-09-16 17:04:09,351 INFO L168 Benchmark]: RCFGBuilder took 199.91 ms. Allocated memory is still 199.2 MB. Free memory was 175.8 MB in the beginning and 165.0 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.8 MB. Max. memory is 7.1 GB. [2019-09-16 17:04:09,352 INFO L168 Benchmark]: TraceAbstraction took 1372.42 ms. Allocated memory was 199.2 MB in the beginning and 223.3 MB in the end (delta: 24.1 MB). Free memory was 165.0 MB in the beginning and 192.3 MB in the end (delta: -27.4 MB). Peak memory consumption was 97.2 MB. Max. memory is 7.1 GB. [2019-09-16 17:04:09,356 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 132.6 MB. Free memory was 105.6 MB in the beginning and 105.3 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 262.69 ms. Allocated memory is still 132.6 MB. Free memory was 87.0 MB in the beginning and 77.7 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 116.82 ms. Allocated memory was 132.6 MB in the beginning and 199.2 MB in the end (delta: 66.6 MB). Free memory was 77.7 MB in the beginning and 175.8 MB in the end (delta: -98.1 MB). Peak memory consumption was 16.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 199.91 ms. Allocated memory is still 199.2 MB. Free memory was 175.8 MB in the beginning and 165.0 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1372.42 ms. Allocated memory was 199.2 MB in the beginning and 223.3 MB in the end (delta: 24.1 MB). Free memory was 165.0 MB in the beginning and 192.3 MB in the end (delta: -27.4 MB). Peak memory consumption was 97.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 7]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. SAFE Result, 1.3s OverallTime, 3 OverallIterations, 2 TraceHistogramMax, 0.2s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 46 SDtfs, 19 SDslu, 78 SDs, 0 SdLazy, 52 SolverSat, 13 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 56 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=22occurred in iteration=2, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.2s AbstIntTime, 1 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 64 NumberOfCodeBlocks, 64 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 59 ConstructedInterpolants, 0 QuantifiedInterpolants, 2655 SizeOfPredicates, 5 NumberOfNonLiveVariables, 77 ConjunctsInSsa, 29 ConjunctsInUnsatCore, 5 InterpolantComputations, 3 PerfectInterpolantSequences, 4/8 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...