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/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --abstractinterpretationv2.abstract.domain IntervalDomain --traceabstraction.trace.refinement.strategy TAIPAN --traceabstraction.abstract.interpretation.mode USE_PREDICATES -i ../../../trunk/examples/svcomp/array-examples/sorting_bubblesort_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 23:51:57,364 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 23:51:57,366 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 23:51:57,381 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 23:51:57,381 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 23:51:57,382 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 23:51:57,384 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 23:51:57,386 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 23:51:57,387 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 23:51:57,388 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 23:51:57,389 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 23:51:57,390 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 23:51:57,391 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 23:51:57,392 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 23:51:57,393 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 23:51:57,394 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 23:51:57,395 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 23:51:57,395 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 23:51:57,397 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 23:51:57,399 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 23:51:57,401 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 23:51:57,402 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 23:51:57,403 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 23:51:57,404 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 23:51:57,406 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 23:51:57,409 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 23:51:57,410 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 23:51:57,411 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 23:51:57,411 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 23:51:57,412 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 23:51:57,413 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 23:51:57,413 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 23:51:57,414 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 23:51:57,414 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 23:51:57,415 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 23:51:57,415 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 23:51:57,416 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-14 23:51:57,431 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 23:51:57,431 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 23:51:57,432 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 23:51:57,433 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 23:51:57,433 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 23:51:57,433 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 23:51:57,433 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 23:51:57,434 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 23:51:57,434 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 23:51:57,434 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 23:51:57,434 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 23:51:57,434 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 23:51:57,435 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 23:51:57,435 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 23:51:57,435 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 23:51:57,435 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 23:51:57,435 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 23:51:57,436 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 23:51:57,436 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 23:51:57,436 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 23:51:57,436 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 23:51:57,436 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 23:51:57,437 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 23:51:57,437 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 23:51:57,437 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 23:51:57,437 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 23:51:57,437 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 23:51:57,438 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 23:51:57,438 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: Abstract domain -> IntervalDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Abstract interpretation Mode -> USE_PREDICATES [2019-10-14 23:51:57,784 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 23:51:57,813 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 23:51:57,816 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 23:51:57,818 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 23:51:57,818 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 23:51:57,819 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/sorting_bubblesort_ground-2.i [2019-10-14 23:51:57,887 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0192080b1/5296cd4e25d4417483b7edcf1de31056/FLAG67b2b6bce [2019-10-14 23:51:58,291 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 23:51:58,292 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/sorting_bubblesort_ground-2.i [2019-10-14 23:51:58,298 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0192080b1/5296cd4e25d4417483b7edcf1de31056/FLAG67b2b6bce [2019-10-14 23:51:58,721 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0192080b1/5296cd4e25d4417483b7edcf1de31056 [2019-10-14 23:51:58,735 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 23:51:58,736 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 23:51:58,741 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 23:51:58,741 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 23:51:58,745 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 23:51:58,746 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:51:58" (1/1) ... [2019-10-14 23:51:58,749 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1e9b8ec1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:51:58, skipping insertion in model container [2019-10-14 23:51:58,749 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:51:58" (1/1) ... [2019-10-14 23:51:58,759 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 23:51:58,778 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 23:51:58,995 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:51:58,999 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 23:51:59,023 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:51:59,128 INFO L192 MainTranslator]: Completed translation [2019-10-14 23:51:59,129 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:51:59 WrapperNode [2019-10-14 23:51:59,129 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 23:51:59,130 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 23:51:59,130 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 23:51:59,130 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 23:51:59,144 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:51:59" (1/1) ... [2019-10-14 23:51:59,144 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:51:59" (1/1) ... [2019-10-14 23:51:59,152 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:51:59" (1/1) ... [2019-10-14 23:51:59,154 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:51:59" (1/1) ... [2019-10-14 23:51:59,171 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:51:59" (1/1) ... [2019-10-14 23:51:59,178 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:51:59" (1/1) ... [2019-10-14 23:51:59,179 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:51:59" (1/1) ... [2019-10-14 23:51:59,181 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 23:51:59,182 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 23:51:59,182 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 23:51:59,182 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 23:51:59,183 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:51:59" (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 [2019-10-14 23:51:59,244 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 23:51:59,244 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 23:51:59,244 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-14 23:51:59,244 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 23:51:59,245 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 23:51:59,245 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-14 23:51:59,245 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 23:51:59,245 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 23:51:59,245 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-14 23:51:59,246 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-14 23:51:59,246 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-14 23:51:59,246 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-14 23:51:59,246 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 23:51:59,246 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 23:51:59,551 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 23:51:59,552 INFO L284 CfgBuilder]: Removed 5 assume(true) statements. [2019-10-14 23:51:59,553 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:51:59 BoogieIcfgContainer [2019-10-14 23:51:59,554 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 23:51:59,555 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 23:51:59,555 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 23:51:59,561 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 23:51:59,562 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 11:51:58" (1/3) ... [2019-10-14 23:51:59,562 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1dc29d9b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:51:59, skipping insertion in model container [2019-10-14 23:51:59,563 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:51:59" (2/3) ... [2019-10-14 23:51:59,563 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1dc29d9b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:51:59, skipping insertion in model container [2019-10-14 23:51:59,563 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:51:59" (3/3) ... [2019-10-14 23:51:59,566 INFO L109 eAbstractionObserver]: Analyzing ICFG sorting_bubblesort_ground-2.i [2019-10-14 23:51:59,577 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 23:51:59,585 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 23:51:59,599 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 23:51:59,632 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 23:51:59,632 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 23:51:59,632 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 23:51:59,632 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 23:51:59,632 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 23:51:59,632 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 23:51:59,632 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 23:51:59,633 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 23:51:59,649 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states. [2019-10-14 23:51:59,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-10-14 23:51:59,654 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:51:59,655 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:51:59,657 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:51:59,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:51:59,662 INFO L82 PathProgramCache]: Analyzing trace with hash -1296691801, now seen corresponding path program 1 times [2019-10-14 23:51:59,671 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:51:59,671 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5152171] [2019-10-14 23:51:59,671 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:51:59,672 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:51:59,672 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:51:59,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:51:59,815 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:51:59,816 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5152171] [2019-10-14 23:51:59,817 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:51:59,817 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-10-14 23:51:59,817 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780617142] [2019-10-14 23:51:59,822 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-14 23:51:59,824 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:51:59,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-14 23:51:59,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-14 23:51:59,843 INFO L87 Difference]: Start difference. First operand 31 states. Second operand 2 states. [2019-10-14 23:51:59,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:51:59,869 INFO L93 Difference]: Finished difference Result 54 states and 75 transitions. [2019-10-14 23:51:59,869 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-14 23:51:59,870 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 16 [2019-10-14 23:51:59,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:51:59,877 INFO L225 Difference]: With dead ends: 54 [2019-10-14 23:51:59,877 INFO L226 Difference]: Without dead ends: 26 [2019-10-14 23:51:59,880 INFO L600 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 [2019-10-14 23:51:59,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-10-14 23:51:59,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2019-10-14 23:51:59,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-10-14 23:51:59,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2019-10-14 23:51:59,917 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 16 [2019-10-14 23:51:59,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:51:59,918 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2019-10-14 23:51:59,918 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-14 23:51:59,918 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2019-10-14 23:51:59,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-10-14 23:51:59,919 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:51:59,919 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:51:59,920 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:51:59,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:51:59,920 INFO L82 PathProgramCache]: Analyzing trace with hash -1547542812, now seen corresponding path program 1 times [2019-10-14 23:51:59,921 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:51:59,921 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353362137] [2019-10-14 23:51:59,921 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:51:59,921 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:51:59,922 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:51:59,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:51:59,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:51:59,977 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353362137] [2019-10-14 23:51:59,980 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:51:59,981 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 23:51:59,981 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998206701] [2019-10-14 23:51:59,984 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 23:51:59,984 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:51:59,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 23:51:59,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 23:51:59,985 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand 3 states. [2019-10-14 23:52:00,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:52:00,032 INFO L93 Difference]: Finished difference Result 46 states and 56 transitions. [2019-10-14 23:52:00,032 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 23:52:00,033 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2019-10-14 23:52:00,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:52:00,034 INFO L225 Difference]: With dead ends: 46 [2019-10-14 23:52:00,034 INFO L226 Difference]: Without dead ends: 28 [2019-10-14 23:52:00,035 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 23:52:00,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-10-14 23:52:00,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2019-10-14 23:52:00,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-10-14 23:52:00,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2019-10-14 23:52:00,050 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 16 [2019-10-14 23:52:00,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:52:00,051 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2019-10-14 23:52:00,051 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 23:52:00,051 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2019-10-14 23:52:00,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-10-14 23:52:00,052 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:52:00,052 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:52:00,053 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:52:00,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:52:00,055 INFO L82 PathProgramCache]: Analyzing trace with hash -1387426810, now seen corresponding path program 1 times [2019-10-14 23:52:00,055 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:52:00,056 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881508296] [2019-10-14 23:52:00,056 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:52:00,058 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:52:00,058 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:52:00,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:52:00,145 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 23:52:00,145 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881508296] [2019-10-14 23:52:00,146 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:52:00,146 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 23:52:00,146 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686587154] [2019-10-14 23:52:00,147 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 23:52:00,147 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:52:00,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 23:52:00,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 23:52:00,148 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand 3 states. [2019-10-14 23:52:00,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:52:00,164 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2019-10-14 23:52:00,164 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 23:52:00,165 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2019-10-14 23:52:00,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:52:00,166 INFO L225 Difference]: With dead ends: 44 [2019-10-14 23:52:00,166 INFO L226 Difference]: Without dead ends: 31 [2019-10-14 23:52:00,167 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 23:52:00,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-10-14 23:52:00,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2019-10-14 23:52:00,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-10-14 23:52:00,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 38 transitions. [2019-10-14 23:52:00,175 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 38 transitions. Word has length 18 [2019-10-14 23:52:00,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:52:00,175 INFO L462 AbstractCegarLoop]: Abstraction has 31 states and 38 transitions. [2019-10-14 23:52:00,175 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 23:52:00,176 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 38 transitions. [2019-10-14 23:52:00,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-10-14 23:52:00,177 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:52:00,177 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:52:00,178 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:52:00,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:52:00,179 INFO L82 PathProgramCache]: Analyzing trace with hash 1108929549, now seen corresponding path program 1 times [2019-10-14 23:52:00,179 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:52:00,180 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838520920] [2019-10-14 23:52:00,180 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:52:00,180 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:52:00,180 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:52:00,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:52:00,259 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 23:52:00,259 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838520920] [2019-10-14 23:52:00,260 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:52:00,260 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 23:52:00,261 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563838511] [2019-10-14 23:52:00,262 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 23:52:00,262 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:52:00,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 23:52:00,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 23:52:00,266 INFO L87 Difference]: Start difference. First operand 31 states and 38 transitions. Second operand 3 states. [2019-10-14 23:52:00,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:52:00,292 INFO L93 Difference]: Finished difference Result 56 states and 71 transitions. [2019-10-14 23:52:00,293 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 23:52:00,293 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2019-10-14 23:52:00,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:52:00,294 INFO L225 Difference]: With dead ends: 56 [2019-10-14 23:52:00,294 INFO L226 Difference]: Without dead ends: 35 [2019-10-14 23:52:00,295 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 23:52:00,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-10-14 23:52:00,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2019-10-14 23:52:00,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-10-14 23:52:00,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2019-10-14 23:52:00,303 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 20 [2019-10-14 23:52:00,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:52:00,303 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2019-10-14 23:52:00,304 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 23:52:00,304 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2019-10-14 23:52:00,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-10-14 23:52:00,305 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:52:00,305 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:52:00,305 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:52:00,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:52:00,306 INFO L82 PathProgramCache]: Analyzing trace with hash -2055572838, now seen corresponding path program 1 times [2019-10-14 23:52:00,306 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:52:00,307 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799309566] [2019-10-14 23:52:00,307 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:52:00,307 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:52:00,307 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:52:00,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:52:00,381 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-14 23:52:00,382 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799309566] [2019-10-14 23:52:00,382 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130617792] [2019-10-14 23:52:00,382 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2019-10-14 23:52:00,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:52:00,465 INFO L256 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-14 23:52:00,473 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:52:00,508 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-14 23:52:00,508 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-14 23:52:00,547 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-14 23:52:00,548 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [1172976119] [2019-10-14 23:52:00,555 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 24 [2019-10-14 23:52:00,597 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-14 23:52:00,598 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-14 23:52:00,666 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-10-14 23:52:00,668 INFO L272 AbstractInterpreter]: Visited 6 different actions 6 times. Never merged. Never widened. Performed 15 root evaluator evaluations with a maximum evaluation depth of 0. Performed 15 inverse root evaluator evaluations with a maximum inverse evaluation depth of 0. Never found a fixpoint. Largest state had 25 variables. [2019-10-14 23:52:00,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:52:00,672 INFO L536 sIntCurrentIteration]: Generating AbsInt predicates [2019-10-14 23:52:00,705 INFO L227 lantSequenceWeakener]: Weakened 4 states. On average, predicates are now at 100% of their original sizes. [2019-10-14 23:52:00,706 INFO L551 sIntCurrentIteration]: Unifying AI predicates [2019-10-14 23:52:00,707 INFO L553 sIntCurrentIteration]: We unified 22 AI predicates to 22 [2019-10-14 23:52:00,708 INFO L562 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-10-14 23:52:00,708 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2019-10-14 23:52:00,709 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4, 4, 4] total 7 [2019-10-14 23:52:00,709 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221761365] [2019-10-14 23:52:00,710 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-14 23:52:00,710 INFO L137 tionRefinementEngine]: Using predicate unifier AbsIntPredicateUnifier provided by strategy TAIPAN [2019-10-14 23:52:00,711 INFO L124 tionRefinementEngine]: Using hoare triple checker CachingHoareTripleCheckerMap provided by strategy [2019-10-14 23:52:00,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-14 23:52:00,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-14 23:52:00,711 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand 2 states. [2019-10-14 23:52:00,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:52:00,716 INFO L93 Difference]: Finished difference Result 32 states and 39 transitions. [2019-10-14 23:52:00,717 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-14 23:52:00,717 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 23 [2019-10-14 23:52:00,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:52:00,717 INFO L225 Difference]: With dead ends: 32 [2019-10-14 23:52:00,718 INFO L226 Difference]: Without dead ends: 0 [2019-10-14 23:52:00,718 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-14 23:52:00,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-10-14 23:52:00,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-10-14 23:52:00,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-10-14 23:52:00,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-10-14 23:52:00,719 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 23 [2019-10-14 23:52:00,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:52:00,720 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-10-14 23:52:00,720 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-14 23:52:00,720 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-10-14 23:52:00,720 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-10-14 23:52:00,924 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:52:00,931 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-10-14 23:52:00,979 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2019-10-14 23:52:00,980 INFO L446 ceAbstractionStarter]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: true [2019-10-14 23:52:00,980 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2019-10-14 23:52:00,980 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-10-14 23:52:00,980 INFO L446 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2019-10-14 23:52:00,981 INFO L446 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2019-10-14 23:52:00,981 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2019-10-14 23:52:00,981 INFO L439 ceAbstractionStarter]: At program point L31(line 31) the Hoare annotation is: false [2019-10-14 23:52:00,981 INFO L443 ceAbstractionStarter]: For program point L31-1(line 31) no Hoare annotation was computed. [2019-10-14 23:52:00,981 INFO L443 ceAbstractionStarter]: For program point mainEXIT(lines 5 35) no Hoare annotation was computed. [2019-10-14 23:52:00,982 INFO L443 ceAbstractionStarter]: For program point L8-2(lines 8 11) no Hoare annotation was computed. [2019-10-14 23:52:00,982 INFO L439 ceAbstractionStarter]: At program point L8-3(lines 8 11) the Hoare annotation is: false [2019-10-14 23:52:00,982 INFO L443 ceAbstractionStarter]: For program point L8-4(lines 8 11) no Hoare annotation was computed. [2019-10-14 23:52:00,982 INFO L443 ceAbstractionStarter]: For program point L29-2(lines 29 33) no Hoare annotation was computed. [2019-10-14 23:52:00,982 INFO L439 ceAbstractionStarter]: At program point L29-3(lines 29 33) the Hoare annotation is: false [2019-10-14 23:52:00,982 INFO L443 ceAbstractionStarter]: For program point L29-4(lines 29 33) no Hoare annotation was computed. [2019-10-14 23:52:00,983 INFO L439 ceAbstractionStarter]: At program point L17-2(lines 17 25) the Hoare annotation is: false [2019-10-14 23:52:00,983 INFO L439 ceAbstractionStarter]: At program point L17-3(lines 14 26) the Hoare annotation is: false [2019-10-14 23:52:00,983 INFO L443 ceAbstractionStarter]: For program point mainFINAL(lines 5 35) no Hoare annotation was computed. [2019-10-14 23:52:00,983 INFO L446 ceAbstractionStarter]: At program point mainENTRY(lines 5 35) the Hoare annotation is: true [2019-10-14 23:52:00,983 INFO L443 ceAbstractionStarter]: For program point L30-2(lines 30 32) no Hoare annotation was computed. [2019-10-14 23:52:00,984 INFO L439 ceAbstractionStarter]: At program point L30-3(lines 30 32) the Hoare annotation is: false [2019-10-14 23:52:00,984 INFO L443 ceAbstractionStarter]: For program point L18(lines 18 23) no Hoare annotation was computed. [2019-10-14 23:52:00,984 INFO L443 ceAbstractionStarter]: For program point L18-2(lines 18 23) no Hoare annotation was computed. [2019-10-14 23:52:00,984 INFO L443 ceAbstractionStarter]: For program point L14-2(lines 14 26) no Hoare annotation was computed. [2019-10-14 23:52:00,984 INFO L443 ceAbstractionStarter]: For program point L2-1(line 2) no Hoare annotation was computed. [2019-10-14 23:52:00,984 INFO L443 ceAbstractionStarter]: For program point L2-3(line 2) no Hoare annotation was computed. [2019-10-14 23:52:00,985 INFO L446 ceAbstractionStarter]: At program point __VERIFIER_assertENTRY(line 2) the Hoare annotation is: true [2019-10-14 23:52:00,985 INFO L443 ceAbstractionStarter]: For program point __VERIFIER_assertEXIT(line 2) no Hoare annotation was computed. [2019-10-14 23:52:00,985 INFO L443 ceAbstractionStarter]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 2) no Hoare annotation was computed. [2019-10-14 23:52:00,985 INFO L443 ceAbstractionStarter]: For program point L2(line 2) no Hoare annotation was computed. [2019-10-14 23:52:01,001 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.10 11:52:01 BoogieIcfgContainer [2019-10-14 23:52:01,001 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-10-14 23:52:01,006 INFO L168 Benchmark]: Toolchain (without parser) took 2267.05 ms. Allocated memory was 144.2 MB in the beginning and 200.3 MB in the end (delta: 56.1 MB). Free memory was 102.3 MB in the beginning and 89.5 MB in the end (delta: 12.8 MB). Peak memory consumption was 68.9 MB. Max. memory is 7.1 GB. [2019-10-14 23:52:01,007 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 144.2 MB. Free memory was 120.6 MB in the beginning and 120.4 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2019-10-14 23:52:01,008 INFO L168 Benchmark]: CACSL2BoogieTranslator took 388.90 ms. Allocated memory was 144.2 MB in the beginning and 200.3 MB in the end (delta: 56.1 MB). Free memory was 102.0 MB in the beginning and 179.5 MB in the end (delta: -77.4 MB). Peak memory consumption was 19.7 MB. Max. memory is 7.1 GB. [2019-10-14 23:52:01,009 INFO L168 Benchmark]: Boogie Preprocessor took 51.90 ms. Allocated memory is still 200.3 MB. Free memory was 179.5 MB in the beginning and 177.0 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.4 MB. Max. memory is 7.1 GB. [2019-10-14 23:52:01,010 INFO L168 Benchmark]: RCFGBuilder took 371.74 ms. Allocated memory is still 200.3 MB. Free memory was 177.0 MB in the beginning and 160.8 MB in the end (delta: 16.2 MB). Peak memory consumption was 16.2 MB. Max. memory is 7.1 GB. [2019-10-14 23:52:01,010 INFO L168 Benchmark]: TraceAbstraction took 1446.64 ms. Allocated memory is still 200.3 MB. Free memory was 160.8 MB in the beginning and 89.5 MB in the end (delta: 71.4 MB). Peak memory consumption was 71.4 MB. Max. memory is 7.1 GB. [2019-10-14 23:52:01,014 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 144.2 MB. Free memory was 120.6 MB in the beginning and 120.4 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 388.90 ms. Allocated memory was 144.2 MB in the beginning and 200.3 MB in the end (delta: 56.1 MB). Free memory was 102.0 MB in the beginning and 179.5 MB in the end (delta: -77.4 MB). Peak memory consumption was 19.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 51.90 ms. Allocated memory is still 200.3 MB. Free memory was 179.5 MB in the beginning and 177.0 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 371.74 ms. Allocated memory is still 200.3 MB. Free memory was 177.0 MB in the beginning and 160.8 MB in the end (delta: 16.2 MB). Peak memory consumption was 16.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1446.64 ms. Allocated memory is still 200.3 MB. Free memory was 160.8 MB in the beginning and 89.5 MB in the end (delta: 71.4 MB). Peak memory consumption was 71.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 2]: 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 - InvariantResult [Line: 30]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 14]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 17]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 29]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 8]: Loop Invariant Derived loop invariant: 0 - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 31 locations, 1 error locations. Result: SAFE, OverallTime: 1.3s, OverallIterations: 5, TraceHistogramMax: 1, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 132 SDtfs, 8 SDslu, 80 SDs, 0 SdLazy, 15 SolverSat, 1 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 33 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=32occurred in iteration=4, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 4 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 11 LocationsWithAnnotation, 15 PreInvPairs, 15 NumberOfFragments, 11 HoareAnnotationTreeSize, 15 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 11 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 116 NumberOfCodeBlocks, 116 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 132 ConstructedInterpolants, 0 QuantifiedInterpolants, 3050 SizeOfPredicates, 1 NumberOfNonLiveVariables, 81 ConjunctsInSsa, 3 ConjunctsInUnsatCore, 7 InterpolantComputations, 4 PerfectInterpolantSequences, 9/12 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: TIME[ms]: 118, ITERATIONS: 1, WAS_STRONG: 1, WEAKENING_RATIO: 0.9659090909090909, AVG_VARS_REMOVED_DURING_WEAKENING: 0.7727272727272727, AVG_WEAKENED_CONJUNCTS: 0.2727272727272727, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...