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 --traceabstraction.trace.refinement.strategy SIFA_TAIPAN --sifa.abstract.domain CompoundDomain --rcfgbuilder.size.of.a.code.block LoopFreeBlock --sifa.call.summarizer TopInputCallSummarizer --sifa.fluid SizeLimitFluid --sifa.simplification.technique SIMPLIFY_QUICK -i ../../../trunk/examples/svcomp/loops/linear_sea.ch.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 03:03:36,367 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 03:03:36,370 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 03:03:36,390 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 03:03:36,391 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 03:03:36,393 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 03:03:36,395 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 03:03:36,405 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 03:03:36,410 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 03:03:36,413 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 03:03:36,414 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 03:03:36,416 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 03:03:36,416 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 03:03:36,418 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 03:03:36,420 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 03:03:36,421 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 03:03:36,423 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 03:03:36,424 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 03:03:36,425 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 03:03:36,430 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 03:03:36,435 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 03:03:36,438 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 03:03:36,441 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 03:03:36,442 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 03:03:36,445 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 03:03:36,451 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-15 03:03:36,453 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-15 03:03:36,453 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-15 03:03:36,454 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-15 03:03:36,456 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-15 03:03:36,456 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-15 03:03:36,457 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-15 03:03:36,457 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-15 03:03:36,457 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 03:03:36,458 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 03:03:36,459 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 03:03:36,460 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 [2019-10-15 03:03:36,491 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 03:03:36,491 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 03:03:36,494 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 03:03:36,494 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 03:03:36,495 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 03:03:36,495 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 03:03:36,495 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 03:03:36,495 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 03:03:36,495 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 03:03:36,496 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 03:03:36,497 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 03:03:36,497 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 03:03:36,497 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 03:03:36,498 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 03:03:36,498 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 03:03:36,498 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 03:03:36,498 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 03:03:36,499 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 03:03:36,499 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 03:03:36,499 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 03:03:36,499 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 03:03:36,499 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 03:03:36,499 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 03:03:36,500 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 03:03:36,500 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 03:03:36,500 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 03:03:36,500 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 03:03:36,500 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 03:03:36,501 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> SIFA_TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> CompoundDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> LoopFreeBlock Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Call Summarizer -> TopInputCallSummarizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Fluid -> SizeLimitFluid Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Simplification Technique -> SIMPLIFY_QUICK [2019-10-15 03:03:36,800 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 03:03:36,825 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 03:03:36,829 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 03:03:36,831 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 03:03:36,832 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 03:03:36,832 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/linear_sea.ch.c [2019-10-15 03:03:36,917 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/343dfeba9/61daf7cefd184d52ae45421855433b4a/FLAGb5556e337 [2019-10-15 03:03:37,429 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 03:03:37,429 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/linear_sea.ch.c [2019-10-15 03:03:37,436 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/343dfeba9/61daf7cefd184d52ae45421855433b4a/FLAGb5556e337 [2019-10-15 03:03:37,849 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/343dfeba9/61daf7cefd184d52ae45421855433b4a [2019-10-15 03:03:37,861 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 03:03:37,863 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 03:03:37,864 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 03:03:37,864 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 03:03:37,867 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 03:03:37,868 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 03:03:37" (1/1) ... [2019-10-15 03:03:37,870 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@694d978b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:03:37, skipping insertion in model container [2019-10-15 03:03:37,871 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 03:03:37" (1/1) ... [2019-10-15 03:03:37,878 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 03:03:37,896 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 03:03:38,084 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 03:03:38,097 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 03:03:38,117 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 03:03:38,135 INFO L192 MainTranslator]: Completed translation [2019-10-15 03:03:38,136 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:03:38 WrapperNode [2019-10-15 03:03:38,136 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 03:03:38,137 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 03:03:38,137 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 03:03:38,137 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 03:03:38,243 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:03:38" (1/1) ... [2019-10-15 03:03:38,244 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:03:38" (1/1) ... [2019-10-15 03:03:38,251 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:03:38" (1/1) ... [2019-10-15 03:03:38,252 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:03:38" (1/1) ... [2019-10-15 03:03:38,259 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:03:38" (1/1) ... [2019-10-15 03:03:38,264 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:03:38" (1/1) ... [2019-10-15 03:03:38,266 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:03:38" (1/1) ... [2019-10-15 03:03:38,268 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 03:03:38,268 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 03:03:38,268 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 03:03:38,269 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 03:03:38,269 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:03:38" (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 [2019-10-15 03:03:38,340 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 03:03:38,340 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 03:03:38,341 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-15 03:03:38,341 INFO L138 BoogieDeclarations]: Found implementation of procedure linear_search [2019-10-15 03:03:38,341 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 03:03:38,341 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 03:03:38,341 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-10-15 03:03:38,341 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-15 03:03:38,341 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2019-10-15 03:03:38,342 INFO L130 BoogieDeclarations]: Found specification of procedure linear_search [2019-10-15 03:03:38,342 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-15 03:03:38,342 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 03:03:38,342 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-10-15 03:03:38,342 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-15 03:03:38,342 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 03:03:38,343 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 03:03:38,343 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-15 03:03:38,722 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 03:03:38,723 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 03:03:38,724 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 03:03:38 BoogieIcfgContainer [2019-10-15 03:03:38,724 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 03:03:38,726 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 03:03:38,726 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 03:03:38,729 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 03:03:38,729 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 03:03:37" (1/3) ... [2019-10-15 03:03:38,730 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e529844 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 03:03:38, skipping insertion in model container [2019-10-15 03:03:38,731 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:03:38" (2/3) ... [2019-10-15 03:03:38,731 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e529844 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 03:03:38, skipping insertion in model container [2019-10-15 03:03:38,731 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 03:03:38" (3/3) ... [2019-10-15 03:03:38,733 INFO L109 eAbstractionObserver]: Analyzing ICFG linear_sea.ch.c [2019-10-15 03:03:38,742 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 03:03:38,750 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 03:03:38,762 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 03:03:38,788 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 03:03:38,789 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 03:03:38,789 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 03:03:38,789 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 03:03:38,789 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 03:03:38,790 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 03:03:38,790 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 03:03:38,790 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 03:03:38,810 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2019-10-15 03:03:38,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-10-15 03:03:38,815 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:03:38,816 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:03:38,819 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:03:38,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:03:38,826 INFO L82 PathProgramCache]: Analyzing trace with hash -2076564389, now seen corresponding path program 1 times [2019-10-15 03:03:38,834 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:03:38,835 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055910191] [2019-10-15 03:03:38,835 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:03:38,835 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:03:38,835 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:03:38,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:03:39,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:03:39,029 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055910191] [2019-10-15 03:03:39,029 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 03:03:39,030 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-10-15 03:03:39,030 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47560025] [2019-10-15 03:03:39,034 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-15 03:03:39,035 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:03:39,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-15 03:03:39,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-15 03:03:39,049 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 2 states. [2019-10-15 03:03:39,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:03:39,070 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2019-10-15 03:03:39,070 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-15 03:03:39,072 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 16 [2019-10-15 03:03:39,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:03:39,080 INFO L225 Difference]: With dead ends: 40 [2019-10-15 03:03:39,080 INFO L226 Difference]: Without dead ends: 18 [2019-10-15 03:03:39,084 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 [2019-10-15 03:03:39,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2019-10-15 03:03:39,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2019-10-15 03:03:39,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-10-15 03:03:39,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2019-10-15 03:03:39,126 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2019-10-15 03:03:39,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:03:39,126 INFO L462 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2019-10-15 03:03:39,126 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-15 03:03:39,126 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2019-10-15 03:03:39,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-10-15 03:03:39,127 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:03:39,128 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:03:39,128 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:03:39,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:03:39,129 INFO L82 PathProgramCache]: Analyzing trace with hash -2013967624, now seen corresponding path program 1 times [2019-10-15 03:03:39,129 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:03:39,129 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200672879] [2019-10-15 03:03:39,129 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:03:39,130 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:03:39,130 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:03:39,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:03:39,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:03:39,502 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200672879] [2019-10-15 03:03:39,504 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 03:03:39,504 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-10-15 03:03:39,505 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392433692] [2019-10-15 03:03:39,507 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-15 03:03:39,508 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:03:39,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-15 03:03:39,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2019-10-15 03:03:39,509 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 8 states. [2019-10-15 03:03:39,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:03:39,763 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2019-10-15 03:03:39,764 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-15 03:03:39,764 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 17 [2019-10-15 03:03:39,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:03:39,765 INFO L225 Difference]: With dead ends: 28 [2019-10-15 03:03:39,766 INFO L226 Difference]: Without dead ends: 20 [2019-10-15 03:03:39,767 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2019-10-15 03:03:39,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-10-15 03:03:39,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-10-15 03:03:39,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-10-15 03:03:39,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2019-10-15 03:03:39,778 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 17 [2019-10-15 03:03:39,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:03:39,779 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2019-10-15 03:03:39,779 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-15 03:03:39,780 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2019-10-15 03:03:39,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-10-15 03:03:39,784 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:03:39,785 INFO L380 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:03:39,786 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:03:39,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:03:39,788 INFO L82 PathProgramCache]: Analyzing trace with hash 1565770985, now seen corresponding path program 1 times [2019-10-15 03:03:39,789 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:03:39,789 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606172611] [2019-10-15 03:03:39,790 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:03:39,790 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:03:39,790 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:03:39,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:03:40,164 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:03:40,165 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606172611] [2019-10-15 03:03:40,165 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1095500987] [2019-10-15 03:03:40,166 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 [2019-10-15 03:03:40,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:03:40,294 INFO L256 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 14 conjunts are in the unsatisfiable core [2019-10-15 03:03:40,304 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:03:40,532 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:03:40,533 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:03:40,850 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:03:40,850 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1345619713] [2019-10-15 03:03:40,880 INFO L162 IcfgInterpreter]: Started Sifa with 18 locations of interest [2019-10-15 03:03:40,880 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 03:03:40,887 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 03:03:40,898 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 03:03:40,898 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 03:03:41,082 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 30 for LOIs [2019-10-15 03:03:41,412 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 11 for LOIs [2019-10-15 03:03:41,428 INFO L199 IcfgInterpreter]: Interpreting procedure linear_search with input of size 18 for LOIs [2019-10-15 03:03:41,539 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 16 for LOIs [2019-10-15 03:03:41,547 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 03:03:42,979 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 03:03:42,979 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 13] total 31 [2019-10-15 03:03:42,979 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421912003] [2019-10-15 03:03:42,981 INFO L442 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-10-15 03:03:42,981 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:03:42,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-10-15 03:03:42,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=830, Unknown=0, NotChecked=0, Total=930 [2019-10-15 03:03:42,984 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 31 states. [2019-10-15 03:03:45,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:03:45,824 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2019-10-15 03:03:45,825 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-10-15 03:03:45,825 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 19 [2019-10-15 03:03:45,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:03:45,827 INFO L225 Difference]: With dead ends: 30 [2019-10-15 03:03:45,827 INFO L226 Difference]: Without dead ends: 22 [2019-10-15 03:03:45,829 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 32 SyntacticMatches, 5 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=227, Invalid=1753, Unknown=0, NotChecked=0, Total=1980 [2019-10-15 03:03:45,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-10-15 03:03:45,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2019-10-15 03:03:45,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-10-15 03:03:45,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2019-10-15 03:03:45,837 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 19 [2019-10-15 03:03:45,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:03:45,837 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2019-10-15 03:03:45,837 INFO L463 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-10-15 03:03:45,838 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2019-10-15 03:03:45,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-10-15 03:03:45,838 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:03:45,839 INFO L380 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:03:46,039 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:03:46,048 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:03:46,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:03:46,048 INFO L82 PathProgramCache]: Analyzing trace with hash 1425770138, now seen corresponding path program 2 times [2019-10-15 03:03:46,048 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:03:46,049 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63291961] [2019-10-15 03:03:46,049 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:03:46,049 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:03:46,050 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:03:46,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:03:46,456 WARN L191 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 27 [2019-10-15 03:03:46,680 WARN L191 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 33 [2019-10-15 03:03:46,949 WARN L191 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 41 [2019-10-15 03:03:47,008 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:03:47,008 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63291961] [2019-10-15 03:03:47,008 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122939140] [2019-10-15 03:03:47,009 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:03:48,147 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-15 03:03:48,147 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 03:03:48,151 INFO L256 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 45 conjunts are in the unsatisfiable core [2019-10-15 03:03:48,154 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:03:48,300 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 03:03:48,801 WARN L191 SmtUtils]: Spent 365.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2019-10-15 03:03:49,594 WARN L191 SmtUtils]: Spent 347.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 50 [2019-10-15 03:03:53,132 WARN L191 SmtUtils]: Spent 3.34 s on a formula simplification. DAG size of input: 48 DAG size of output: 48 [2019-10-15 03:03:53,170 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:03:53,171 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:03:53,453 WARN L191 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 56 [2019-10-15 03:03:53,678 WARN L191 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 63 [2019-10-15 03:03:54,443 WARN L225 Elim1Store]: Array PQE input equivalent to true [2019-10-15 03:03:54,485 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:03:54,486 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [900947509] [2019-10-15 03:03:54,487 INFO L162 IcfgInterpreter]: Started Sifa with 18 locations of interest [2019-10-15 03:03:54,488 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 03:03:54,488 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 03:03:54,489 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 03:03:54,489 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 03:03:54,552 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 30 for LOIs [2019-10-15 03:03:54,705 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 11 for LOIs [2019-10-15 03:03:54,727 INFO L199 IcfgInterpreter]: Interpreting procedure linear_search with input of size 18 for LOIs [2019-10-15 03:03:54,820 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 16 for LOIs [2019-10-15 03:03:54,827 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 03:03:56,897 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 03:03:56,897 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14, 11, 13] total 43 [2019-10-15 03:03:56,898 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849327877] [2019-10-15 03:03:56,899 INFO L442 AbstractCegarLoop]: Interpolant automaton has 43 states [2019-10-15 03:03:56,900 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:03:56,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2019-10-15 03:03:56,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=1661, Unknown=0, NotChecked=0, Total=1806 [2019-10-15 03:03:56,901 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 43 states. [2019-10-15 03:03:57,534 WARN L191 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 49 [2019-10-15 03:03:59,764 WARN L191 SmtUtils]: Spent 2.15 s on a formula simplification. DAG size of input: 76 DAG size of output: 61 [2019-10-15 03:04:00,353 WARN L191 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 60 [2019-10-15 03:04:04,486 WARN L191 SmtUtils]: Spent 3.95 s on a formula simplification. DAG size of input: 110 DAG size of output: 74 [2019-10-15 03:04:05,655 WARN L191 SmtUtils]: Spent 1.01 s on a formula simplification. DAG size of input: 103 DAG size of output: 81 [2019-10-15 03:04:08,389 WARN L191 SmtUtils]: Spent 2.11 s on a formula simplification. DAG size of input: 66 DAG size of output: 54 [2019-10-15 03:04:08,958 WARN L191 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 85 [2019-10-15 03:04:09,757 WARN L191 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 57 [2019-10-15 03:04:11,476 WARN L191 SmtUtils]: Spent 821.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 48 [2019-10-15 03:04:12,615 WARN L191 SmtUtils]: Spent 781.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 50 [2019-10-15 03:04:13,253 WARN L191 SmtUtils]: Spent 539.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 49 [2019-10-15 03:04:13,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:04:13,284 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2019-10-15 03:04:13,284 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-10-15 03:04:13,284 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 21 [2019-10-15 03:04:13,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:04:13,285 INFO L225 Difference]: With dead ends: 32 [2019-10-15 03:04:13,285 INFO L226 Difference]: Without dead ends: 24 [2019-10-15 03:04:13,287 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 726 ImplicationChecksByTransitivity, 22.3s TimeCoverageRelationStatistics Valid=344, Invalid=3078, Unknown=0, NotChecked=0, Total=3422 [2019-10-15 03:04:13,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-10-15 03:04:13,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2019-10-15 03:04:13,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-10-15 03:04:13,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2019-10-15 03:04:13,299 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 21 [2019-10-15 03:04:13,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:04:13,302 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2019-10-15 03:04:13,302 INFO L463 AbstractCegarLoop]: Interpolant automaton has 43 states. [2019-10-15 03:04:13,302 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2019-10-15 03:04:13,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-10-15 03:04:13,304 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:04:13,304 INFO L380 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:04:13,505 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:04:13,505 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:04:13,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:04:13,506 INFO L82 PathProgramCache]: Analyzing trace with hash 28942347, now seen corresponding path program 3 times [2019-10-15 03:04:13,507 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:04:13,507 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414845470] [2019-10-15 03:04:13,507 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:04:13,508 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:04:13,508 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:04:13,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:04:13,940 WARN L191 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 29 [2019-10-15 03:04:14,169 WARN L191 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 34 [2019-10-15 03:04:14,663 WARN L191 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 32 [2019-10-15 03:04:14,747 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:04:14,748 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414845470] [2019-10-15 03:04:14,748 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608492999] [2019-10-15 03:04:14,748 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST 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 [2019-10-15 03:04:14,855 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-15 03:04:14,855 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 03:04:14,856 INFO L256 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 36 conjunts are in the unsatisfiable core [2019-10-15 03:04:14,859 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:04:14,904 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 03:04:14,911 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 03:04:17,033 WARN L191 SmtUtils]: Spent 2.12 s on a formula simplification. DAG size of input: 51 DAG size of output: 21 [2019-10-15 03:04:17,558 WARN L191 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 41 [2019-10-15 03:04:17,976 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:04:17,976 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:04:18,202 WARN L191 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 59 [2019-10-15 03:04:18,393 WARN L191 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 55 [2019-10-15 03:04:19,193 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:04:19,194 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1521719851] [2019-10-15 03:04:19,195 INFO L162 IcfgInterpreter]: Started Sifa with 18 locations of interest [2019-10-15 03:04:19,196 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 03:04:19,196 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 03:04:19,197 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 03:04:19,197 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 03:04:19,246 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 30 for LOIs [2019-10-15 03:04:19,414 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 11 for LOIs [2019-10-15 03:04:19,432 INFO L199 IcfgInterpreter]: Interpreting procedure linear_search with input of size 18 for LOIs [2019-10-15 03:04:19,540 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 16 for LOIs [2019-10-15 03:04:19,546 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 03:04:21,336 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 03:04:21,336 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 12, 13] total 44 [2019-10-15 03:04:21,336 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452494184] [2019-10-15 03:04:21,338 INFO L442 AbstractCegarLoop]: Interpolant automaton has 44 states [2019-10-15 03:04:21,338 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:04:21,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2019-10-15 03:04:21,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=1757, Unknown=0, NotChecked=0, Total=1892 [2019-10-15 03:04:21,340 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 44 states. [2019-10-15 03:04:22,242 WARN L191 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 59 [2019-10-15 03:04:22,554 WARN L191 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 58