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_search.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 03:03:36,343 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 03:03:36,347 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 03:03:36,367 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 03:03:36,368 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 03:03:36,371 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 03:03:36,373 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 03:03:36,380 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 03:03:36,386 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 03:03:36,388 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 03:03:36,390 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 03:03:36,391 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 03:03:36,391 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 03:03:36,394 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 03:03:36,397 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 03:03:36,399 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 03:03:36,401 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 03:03:36,402 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 03:03:36,404 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 03:03:36,409 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 03:03:36,413 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 03:03:36,416 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 03:03:36,419 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 03:03:36,420 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 03:03:36,425 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 03:03:36,435 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 03:03:36,436 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 03:03:36,437 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 03:03:36,438 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 03:03:36,462 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 03:03:36,462 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 03:03:36,464 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 03:03:36,464 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 03:03:36,464 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 03:03:36,465 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 03:03:36,465 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 03:03:36,465 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 03:03:36,465 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 03:03:36,466 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 03:03:36,467 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 03:03:36,467 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 03:03:36,467 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 03:03:36,468 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 03:03:36,468 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 03:03:36,468 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 03:03:36,468 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 03:03:36,469 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 03:03:36,469 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 03:03:36,469 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 03:03:36,469 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 03:03:36,469 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 03:03:36,470 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 03:03:36,470 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 03:03:36,470 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 03:03:36,470 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 03:03:36,471 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 03:03:36,471 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 03:03:36,471 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 03:03:36,772 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 03:03:36,784 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 03:03:36,788 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 03:03:36,789 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 03:03:36,790 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 03:03:36,790 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/linear_search.c [2019-10-15 03:03:36,857 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e231e11d2/8c012e957d614c43b7055b6509d8afbd/FLAGa8d9a8868 [2019-10-15 03:03:37,287 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 03:03:37,288 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/linear_search.c [2019-10-15 03:03:37,293 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e231e11d2/8c012e957d614c43b7055b6509d8afbd/FLAGa8d9a8868 [2019-10-15 03:03:37,655 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e231e11d2/8c012e957d614c43b7055b6509d8afbd [2019-10-15 03:03:37,666 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 03:03:37,667 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 03:03:37,668 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 03:03:37,669 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 03:03:37,672 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 03:03:37,673 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 03:03:37" (1/1) ... [2019-10-15 03:03:37,676 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d8dadd3 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 03:03:37,677 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 03:03:37" (1/1) ... [2019-10-15 03:03:37,684 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 03:03:37,703 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 03:03:37,905 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 03:03:37,927 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 03:03:37,955 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 03:03:37,975 INFO L192 MainTranslator]: Completed translation [2019-10-15 03:03:37,976 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:03:37 WrapperNode [2019-10-15 03:03:37,976 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 03:03:37,977 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 03:03:37,977 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 03:03:37,978 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 03:03:38,093 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:03:37" (1/1) ... [2019-10-15 03:03:38,093 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:03:37" (1/1) ... [2019-10-15 03:03:38,102 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:03:37" (1/1) ... [2019-10-15 03:03:38,103 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:03:37" (1/1) ... [2019-10-15 03:03:38,121 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:03:37" (1/1) ... [2019-10-15 03:03:38,127 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:03:37" (1/1) ... [2019-10-15 03:03:38,128 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:03:37" (1/1) ... [2019-10-15 03:03:38,131 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 03:03:38,132 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 03:03:38,132 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 03:03:38,132 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 03:03:38,133 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:03:37" (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 03:03:38,194 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 03:03:38,194 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 03:03:38,194 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-15 03:03:38,194 INFO L138 BoogieDeclarations]: Found implementation of procedure linear_search [2019-10-15 03:03:38,194 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 03:03:38,195 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 03:03:38,195 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-10-15 03:03:38,195 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-15 03:03:38,196 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2019-10-15 03:03:38,196 INFO L130 BoogieDeclarations]: Found specification of procedure linear_search [2019-10-15 03:03:38,196 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-15 03:03:38,196 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 03:03:38,196 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-10-15 03:03:38,196 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-15 03:03:38,197 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 03:03:38,197 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 03:03:38,197 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-15 03:03:38,599 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 03:03:38,600 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 03:03:38,601 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 03:03:38 BoogieIcfgContainer [2019-10-15 03:03:38,601 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 03:03:38,603 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 03:03:38,603 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 03:03:38,606 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 03:03:38,607 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 03:03:37" (1/3) ... [2019-10-15 03:03:38,618 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@597bef1f 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 03:03:38,618 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:03:37" (2/3) ... [2019-10-15 03:03:38,619 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@597bef1f 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 03:03:38,619 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 03:03:38,621 INFO L109 eAbstractionObserver]: Analyzing ICFG linear_search.c [2019-10-15 03:03:38,630 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 03:03:38,639 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 03:03:38,651 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 03:03:38,677 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 03:03:38,677 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 03:03:38,677 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 03:03:38,678 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 03:03:38,678 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 03:03:38,678 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 03:03:38,678 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 03:03:38,678 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 03:03:38,697 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2019-10-15 03:03:38,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-10-15 03:03:38,703 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:03:38,704 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:03:38,706 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:03:38,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:03:38,711 INFO L82 PathProgramCache]: Analyzing trace with hash -1155056295, now seen corresponding path program 1 times [2019-10-15 03:03:38,720 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:03:38,720 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307168676] [2019-10-15 03:03:38,721 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:03:38,721 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:03:38,721 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:03:38,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:03:38,905 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 03:03:38,906 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307168676] [2019-10-15 03:03:38,907 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 03:03:38,907 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-10-15 03:03:38,908 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116161914] [2019-10-15 03:03:38,914 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-15 03:03:38,915 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:03:38,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-15 03:03:38,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-15 03:03:38,939 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 2 states. [2019-10-15 03:03:38,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:03:38,964 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2019-10-15 03:03:38,964 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-15 03:03:38,966 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 16 [2019-10-15 03:03:38,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:03:38,975 INFO L225 Difference]: With dead ends: 40 [2019-10-15 03:03:38,975 INFO L226 Difference]: Without dead ends: 18 [2019-10-15 03:03:38,978 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 03:03:38,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2019-10-15 03:03:39,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2019-10-15 03:03:39,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-10-15 03:03:39,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2019-10-15 03:03:39,020 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2019-10-15 03:03:39,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:03:39,020 INFO L462 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2019-10-15 03:03:39,021 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-15 03:03:39,021 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2019-10-15 03:03:39,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-10-15 03:03:39,022 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:03:39,022 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 03:03:39,022 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:03:39,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:03:39,023 INFO L82 PathProgramCache]: Analyzing trace with hash -890265588, now seen corresponding path program 1 times [2019-10-15 03:03:39,023 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:03:39,024 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669054765] [2019-10-15 03:03:39,024 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:03:39,024 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:03:39,024 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:03:39,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:03:39,390 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 03:03:39,391 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669054765] [2019-10-15 03:03:39,394 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 03:03:39,394 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-10-15 03:03:39,394 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332791247] [2019-10-15 03:03:39,396 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-15 03:03:39,399 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:03:39,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-15 03:03:39,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2019-10-15 03:03:39,400 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 8 states. [2019-10-15 03:03:39,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:03:39,693 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2019-10-15 03:03:39,694 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-15 03:03:39,694 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 17 [2019-10-15 03:03:39,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:03:39,695 INFO L225 Difference]: With dead ends: 28 [2019-10-15 03:03:39,696 INFO L226 Difference]: Without dead ends: 20 [2019-10-15 03:03:39,697 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 03:03:39,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-10-15 03:03:39,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-10-15 03:03:39,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-10-15 03:03:39,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2019-10-15 03:03:39,708 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 17 [2019-10-15 03:03:39,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:03:39,709 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2019-10-15 03:03:39,709 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-15 03:03:39,710 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2019-10-15 03:03:39,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-10-15 03:03:39,713 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:03:39,713 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 03:03:39,714 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:03:39,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:03:39,715 INFO L82 PathProgramCache]: Analyzing trace with hash 831240490, now seen corresponding path program 1 times [2019-10-15 03:03:39,716 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:03:39,716 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124787757] [2019-10-15 03:03:39,716 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:03:39,716 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:03:39,716 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:03:39,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:03:40,092 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 03:03:40,092 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124787757] [2019-10-15 03:03:40,093 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065314309] [2019-10-15 03:03:40,093 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 03:03:40,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:03:40,231 INFO L256 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 13 conjunts are in the unsatisfiable core [2019-10-15 03:03:40,241 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:03:40,427 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 03:03:40,427 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:03:40,669 WARN L191 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 20 [2019-10-15 03:03:40,901 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 03:03:40,993 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 03:03:40,997 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [919438227] [2019-10-15 03:03:41,034 INFO L162 IcfgInterpreter]: Started Sifa with 18 locations of interest [2019-10-15 03:03:41,034 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 03:03:41,046 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 03:03:41,053 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 03:03:41,054 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 03:03:41,250 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 30 for LOIs [2019-10-15 03:03:41,577 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 14 for LOIs [2019-10-15 03:03:41,638 INFO L199 IcfgInterpreter]: Interpreting procedure linear_search with input of size 18 for LOIs [2019-10-15 03:03:41,877 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 16 for LOIs [2019-10-15 03:03:41,885 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 03:03:45,316 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 03:03:45,317 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 13] total 31 [2019-10-15 03:03:45,317 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750769067] [2019-10-15 03:03:45,319 INFO L442 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-10-15 03:03:45,319 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:03:45,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-10-15 03:03:45,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=829, Unknown=1, NotChecked=0, Total=930 [2019-10-15 03:03:45,322 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 31 states. [2019-10-15 03:03:45,878 WARN L191 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 42 [2019-10-15 03:03:46,907 WARN L191 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 47 [2019-10-15 03:03:47,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:03:47,759 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2019-10-15 03:03:47,760 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-10-15 03:03:47,760 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 19 [2019-10-15 03:03:47,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:03:47,761 INFO L225 Difference]: With dead ends: 30 [2019-10-15 03:03:47,761 INFO L226 Difference]: Without dead ends: 22 [2019-10-15 03:03:47,763 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 31 SyntacticMatches, 6 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=227, Invalid=1752, Unknown=1, NotChecked=0, Total=1980 [2019-10-15 03:03:47,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-10-15 03:03:47,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2019-10-15 03:03:47,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-10-15 03:03:47,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2019-10-15 03:03:47,776 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 19 [2019-10-15 03:03:47,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:03:47,777 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2019-10-15 03:03:47,777 INFO L463 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-10-15 03:03:47,777 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2019-10-15 03:03:47,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-10-15 03:03:47,780 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:03:47,781 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 03:03:47,984 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:03:47,985 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:03:47,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:03:47,985 INFO L82 PathProgramCache]: Analyzing trace with hash 1636172488, now seen corresponding path program 2 times [2019-10-15 03:03:47,986 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:03:47,986 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157686028] [2019-10-15 03:03:47,986 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:03:47,987 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:03:47,987 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:03:48,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:03:48,555 WARN L191 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 162 DAG size of output: 27 [2019-10-15 03:03:48,851 WARN L191 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 37 [2019-10-15 03:03:49,188 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 03:03:49,189 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157686028] [2019-10-15 03:03:49,189 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066544248] [2019-10-15 03:03:49,190 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 03:03:49,332 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-15 03:03:49,332 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 03:03:49,334 INFO L256 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 50 conjunts are in the unsatisfiable core [2019-10-15 03:03:49,338 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:03:49,427 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 03:03:51,550 WARN L191 SmtUtils]: Spent 2.12 s on a formula simplification. DAG size of input: 62 DAG size of output: 30 [2019-10-15 03:03:52,188 WARN L191 SmtUtils]: Spent 506.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2019-10-15 03:03:52,913 WARN L191 SmtUtils]: Spent 674.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2019-10-15 03:03:55,699 WARN L191 SmtUtils]: Spent 2.63 s on a formula simplification. DAG size of input: 66 DAG size of output: 56 [2019-10-15 03:03:56,481 WARN L191 SmtUtils]: Spent 706.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2019-10-15 03:04:00,483 WARN L191 SmtUtils]: Spent 3.91 s on a formula simplification. DAG size of input: 62 DAG size of output: 52 [2019-10-15 03:04:02,202 WARN L191 SmtUtils]: Spent 1.50 s on a formula simplification. DAG size of input: 48 DAG size of output: 48 [2019-10-15 03:04:02,220 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 03:04:02,221 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:04:02,702 WARN L191 SmtUtils]: Spent 329.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 70 [2019-10-15 03:04:02,949 WARN L191 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 63 [2019-10-15 03:04:03,476 WARN L191 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 47 [2019-10-15 03:04:04,063 WARN L191 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 71 [2019-10-15 03:04:04,612 WARN L191 SmtUtils]: Spent 367.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2019-10-15 03:04:04,654 WARN L225 Elim1Store]: Array PQE input equivalent to true [2019-10-15 03:04:04,662 WARN L225 Elim1Store]: Array PQE input equivalent to true [2019-10-15 03:04:04,734 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 03:04:04,735 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1553850400] [2019-10-15 03:04:04,737 INFO L162 IcfgInterpreter]: Started Sifa with 18 locations of interest [2019-10-15 03:04:04,737 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 03:04:04,738 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 03:04:04,739 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 03:04:04,739 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 03:04:04,813 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 30 for LOIs [2019-10-15 03:04:04,978 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 16 for LOIs [2019-10-15 03:04:05,031 INFO L199 IcfgInterpreter]: Interpreting procedure linear_search with input of size 18 for LOIs [2019-10-15 03:04:05,232 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 16 for LOIs [2019-10-15 03:04:05,242 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 03:04:06,010 WARN L191 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 16 [2019-10-15 03:04:06,251 WARN L191 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 26 [2019-10-15 03:04:08,211 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 03:04:08,212 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15, 12, 13] total 45 [2019-10-15 03:04:08,212 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984452079] [2019-10-15 03:04:08,214 INFO L442 AbstractCegarLoop]: Interpolant automaton has 45 states [2019-10-15 03:04:08,215 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:04:08,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2019-10-15 03:04:08,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=1820, Unknown=0, NotChecked=0, Total=1980 [2019-10-15 03:04:08,216 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 45 states. [2019-10-15 03:04:09,010 WARN L191 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 46 [2019-10-15 03:04:09,411 WARN L191 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 58 [2019-10-15 03:04:13,035 WARN L191 SmtUtils]: Spent 3.45 s on a formula simplification. DAG size of input: 90 DAG size of output: 70 [2019-10-15 03:04:13,334 WARN L191 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 61 [2019-10-15 03:04:15,232 WARN L191 SmtUtils]: Spent 1.71 s on a formula simplification. DAG size of input: 119 DAG size of output: 73 [2019-10-15 03:04:15,596 WARN L191 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 77 [2019-10-15 03:04:16,454 WARN L191 SmtUtils]: Spent 671.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2019-10-15 03:04:17,035 WARN L191 SmtUtils]: Spent 366.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 87 [2019-10-15 03:04:18,237 WARN L191 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 55 [2019-10-15 03:04:20,100 WARN L191 SmtUtils]: Spent 630.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 45 [2019-10-15 03:04:20,687 WARN L191 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 46 [2019-10-15 03:04:20,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:04:20,725 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2019-10-15 03:04:20,729 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-10-15 03:04:20,729 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 21 [2019-10-15 03:04:20,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:04:20,730 INFO L225 Difference]: With dead ends: 32 [2019-10-15 03:04:20,730 INFO L226 Difference]: Without dead ends: 24 [2019-10-15 03:04:20,732 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 905 ImplicationChecksByTransitivity, 26.7s TimeCoverageRelationStatistics Valid=380, Invalid=3402, Unknown=0, NotChecked=0, Total=3782 [2019-10-15 03:04:20,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-10-15 03:04:20,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2019-10-15 03:04:20,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-10-15 03:04:20,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2019-10-15 03:04:20,741 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 21 [2019-10-15 03:04:20,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:04:20,741 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2019-10-15 03:04:20,741 INFO L463 AbstractCegarLoop]: Interpolant automaton has 45 states. [2019-10-15 03:04:20,741 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2019-10-15 03:04:20,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-10-15 03:04:20,742 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:04:20,742 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 03:04:20,946 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:04:20,946 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:04:20,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:04:20,947 INFO L82 PathProgramCache]: Analyzing trace with hash 2081709286, now seen corresponding path program 3 times [2019-10-15 03:04:20,947 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:04:20,947 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473777183] [2019-10-15 03:04:20,948 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:04:20,948 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:04:20,948 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:04:21,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:04:21,775 WARN L191 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 40 [2019-10-15 03:04:22,159 WARN L191 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 43 [2019-10-15 03:04:22,387 WARN L191 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 57 [2019-10-15 03:04:22,660 WARN L191 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 68 [2019-10-15 03:04:22,951 WARN L191 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 64