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/loop-acceleration/array_2-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 03:00:57,429 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 03:00:57,432 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 03:00:57,450 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 03:00:57,450 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 03:00:57,452 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 03:00:57,454 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 03:00:57,466 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 03:00:57,468 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 03:00:57,468 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 03:00:57,469 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 03:00:57,470 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 03:00:57,470 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 03:00:57,471 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 03:00:57,472 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 03:00:57,474 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 03:00:57,475 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 03:00:57,476 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 03:00:57,479 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 03:00:57,482 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 03:00:57,485 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 03:00:57,487 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 03:00:57,488 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 03:00:57,490 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 03:00:57,494 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 03:00:57,501 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-15 03:00:57,501 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-15 03:00:57,502 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-15 03:00:57,503 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-15 03:00:57,507 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-15 03:00:57,507 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-15 03:00:57,508 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-15 03:00:57,508 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-15 03:00:57,509 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 03:00:57,509 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 03:00:57,513 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 03:00:57,514 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 03:00:57,538 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 03:00:57,538 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 03:00:57,542 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 03:00:57,543 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 03:00:57,543 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 03:00:57,543 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 03:00:57,543 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 03:00:57,543 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 03:00:57,543 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 03:00:57,544 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 03:00:57,544 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 03:00:57,544 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 03:00:57,544 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 03:00:57,544 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 03:00:57,544 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 03:00:57,545 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 03:00:57,545 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 03:00:57,545 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 03:00:57,545 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 03:00:57,545 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 03:00:57,546 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 03:00:57,546 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 03:00:57,546 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 03:00:57,546 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 03:00:57,546 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 03:00:57,547 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 03:00:57,547 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 03:00:57,547 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 03:00:57,547 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 03:00:57,826 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 03:00:57,848 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 03:00:57,852 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 03:00:57,853 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 03:00:57,854 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 03:00:57,854 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/array_2-1.i [2019-10-15 03:00:57,924 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/46940c2b2/5cb14ce3f4ec4b9bb85388e1ddf469b8/FLAG51a1657cf [2019-10-15 03:00:58,395 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 03:00:58,396 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/array_2-1.i [2019-10-15 03:00:58,405 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/46940c2b2/5cb14ce3f4ec4b9bb85388e1ddf469b8/FLAG51a1657cf [2019-10-15 03:00:58,794 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/46940c2b2/5cb14ce3f4ec4b9bb85388e1ddf469b8 [2019-10-15 03:00:58,805 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 03:00:58,806 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 03:00:58,807 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 03:00:58,807 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 03:00:58,811 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 03:00:58,812 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 03:00:58" (1/1) ... [2019-10-15 03:00:58,815 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7c6ea3f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:00:58, skipping insertion in model container [2019-10-15 03:00:58,815 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 03:00:58" (1/1) ... [2019-10-15 03:00:58,822 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 03:00:58,840 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 03:00:59,003 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 03:00:59,007 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 03:00:59,025 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 03:00:59,042 INFO L192 MainTranslator]: Completed translation [2019-10-15 03:00:59,043 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:00:59 WrapperNode [2019-10-15 03:00:59,043 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 03:00:59,044 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 03:00:59,044 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 03:00:59,044 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 03:00:59,155 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:00:59" (1/1) ... [2019-10-15 03:00:59,156 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:00:59" (1/1) ... [2019-10-15 03:00:59,162 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:00:59" (1/1) ... [2019-10-15 03:00:59,164 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:00:59" (1/1) ... [2019-10-15 03:00:59,170 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:00:59" (1/1) ... [2019-10-15 03:00:59,174 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:00:59" (1/1) ... [2019-10-15 03:00:59,176 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:00:59" (1/1) ... [2019-10-15 03:00:59,178 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 03:00:59,178 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 03:00:59,178 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 03:00:59,178 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 03:00:59,179 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:00:59" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 03:00:59,237 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 03:00:59,237 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 03:00:59,237 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-15 03:00:59,237 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 03:00:59,237 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 03:00:59,237 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-15 03:00:59,238 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 03:00:59,238 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-15 03:00:59,238 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-15 03:00:59,238 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-15 03:00:59,238 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-15 03:00:59,238 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 03:00:59,239 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 03:00:59,514 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 03:00:59,515 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 03:00:59,516 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 03:00:59 BoogieIcfgContainer [2019-10-15 03:00:59,516 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 03:00:59,517 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 03:00:59,517 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 03:00:59,523 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 03:00:59,523 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 03:00:58" (1/3) ... [2019-10-15 03:00:59,524 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2201084d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 03:00:59, skipping insertion in model container [2019-10-15 03:00:59,524 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:00:59" (2/3) ... [2019-10-15 03:00:59,525 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2201084d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 03:00:59, skipping insertion in model container [2019-10-15 03:00:59,525 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 03:00:59" (3/3) ... [2019-10-15 03:00:59,532 INFO L109 eAbstractionObserver]: Analyzing ICFG array_2-1.i [2019-10-15 03:00:59,542 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 03:00:59,548 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 03:00:59,557 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 03:00:59,580 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 03:00:59,580 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 03:00:59,580 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 03:00:59,580 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 03:00:59,580 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 03:00:59,581 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 03:00:59,581 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 03:00:59,581 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 03:00:59,595 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2019-10-15 03:00:59,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-10-15 03:00:59,600 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:00:59,601 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:00:59,603 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:00:59,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:00:59,608 INFO L82 PathProgramCache]: Analyzing trace with hash 1959451811, now seen corresponding path program 1 times [2019-10-15 03:00:59,615 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:00:59,615 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781671017] [2019-10-15 03:00:59,616 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:00:59,616 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:00:59,616 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:00:59,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:00:59,777 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 03:00:59,778 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781671017] [2019-10-15 03:00:59,778 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 03:00:59,779 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 03:00:59,779 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731467211] [2019-10-15 03:00:59,783 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 03:00:59,783 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:00:59,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 03:00:59,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 03:00:59,796 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 3 states. [2019-10-15 03:00:59,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:00:59,843 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2019-10-15 03:00:59,844 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 03:00:59,845 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2019-10-15 03:00:59,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:00:59,853 INFO L225 Difference]: With dead ends: 29 [2019-10-15 03:00:59,854 INFO L226 Difference]: Without dead ends: 12 [2019-10-15 03:00:59,857 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 03:00:59,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2019-10-15 03:00:59,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2019-10-15 03:00:59,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2019-10-15 03:00:59,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2019-10-15 03:00:59,895 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2019-10-15 03:00:59,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:00:59,896 INFO L462 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2019-10-15 03:00:59,896 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 03:00:59,896 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2019-10-15 03:00:59,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-10-15 03:00:59,897 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:00:59,897 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:00:59,898 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:00:59,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:00:59,898 INFO L82 PathProgramCache]: Analyzing trace with hash 504932467, now seen corresponding path program 1 times [2019-10-15 03:00:59,899 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:00:59,899 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995201900] [2019-10-15 03:00:59,899 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:00:59,900 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:00:59,900 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:00:59,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:00:59,989 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:00:59,990 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995201900] [2019-10-15 03:00:59,991 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471686778] [2019-10-15 03:00:59,991 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 03:01:00,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:01:00,043 INFO L256 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 03:01:00,049 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:01:00,092 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:01:00,093 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:01:00,135 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:01:00,135 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1037880610] [2019-10-15 03:01:00,162 INFO L162 IcfgInterpreter]: Started Sifa with 11 locations of interest [2019-10-15 03:01:00,163 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 03:01:00,183 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 03:01:00,191 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 03:01:00,192 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 03:01:00,388 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 03:01:00,881 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 34 for LOIs [2019-10-15 03:01:00,907 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 03:01:00,919 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 03:01:01,282 WARN L191 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 15 [2019-10-15 03:01:01,417 WARN L191 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 29 [2019-10-15 03:01:01,561 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 03:01:01,561 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 9] total 16 [2019-10-15 03:01:01,562 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681302498] [2019-10-15 03:01:01,566 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-10-15 03:01:01,567 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:01:01,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-10-15 03:01:01,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2019-10-15 03:01:01,571 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 16 states. [2019-10-15 03:01:02,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:01:02,336 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2019-10-15 03:01:02,337 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-10-15 03:01:02,337 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 11 [2019-10-15 03:01:02,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:01:02,338 INFO L225 Difference]: With dead ends: 20 [2019-10-15 03:01:02,339 INFO L226 Difference]: Without dead ends: 15 [2019-10-15 03:01:02,341 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=129, Invalid=521, Unknown=0, NotChecked=0, Total=650 [2019-10-15 03:01:02,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2019-10-15 03:01:02,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2019-10-15 03:01:02,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-10-15 03:01:02,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2019-10-15 03:01:02,351 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 11 [2019-10-15 03:01:02,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:01:02,351 INFO L462 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2019-10-15 03:01:02,351 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-10-15 03:01:02,351 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2019-10-15 03:01:02,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-10-15 03:01:02,352 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:01:02,352 INFO L380 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:01:02,554 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:01:02,555 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:01:02,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:01:02,555 INFO L82 PathProgramCache]: Analyzing trace with hash 1070026915, now seen corresponding path program 2 times [2019-10-15 03:01:02,555 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:01:02,557 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878377041] [2019-10-15 03:01:02,558 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:01:02,558 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:01:02,558 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:01:02,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:01:02,704 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:01:02,705 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878377041] [2019-10-15 03:01:02,705 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222108980] [2019-10-15 03:01:02,705 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 03:01:02,770 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-15 03:01:02,771 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 03:01:02,772 INFO L256 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-15 03:01:02,774 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:01:02,791 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:01:02,791 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:01:02,870 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:01:02,870 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [578013939] [2019-10-15 03:01:02,872 INFO L162 IcfgInterpreter]: Started Sifa with 11 locations of interest [2019-10-15 03:01:02,872 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 03:01:02,873 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 03:01:02,873 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 03:01:02,873 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 03:01:02,915 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 03:01:03,198 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 34 for LOIs [2019-10-15 03:01:03,218 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 03:01:03,227 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 03:01:03,671 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 03:01:03,672 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 9] total 22 [2019-10-15 03:01:03,672 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145916972] [2019-10-15 03:01:03,673 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-10-15 03:01:03,673 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:01:03,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-10-15 03:01:03,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=359, Unknown=0, NotChecked=0, Total=462 [2019-10-15 03:01:03,676 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 22 states. [2019-10-15 03:01:04,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:01:04,461 INFO L93 Difference]: Finished difference Result 26 states and 31 transitions. [2019-10-15 03:01:04,462 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-10-15 03:01:04,462 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 14 [2019-10-15 03:01:04,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:01:04,463 INFO L225 Difference]: With dead ends: 26 [2019-10-15 03:01:04,463 INFO L226 Difference]: Without dead ends: 21 [2019-10-15 03:01:04,466 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=300, Invalid=1106, Unknown=0, NotChecked=0, Total=1406 [2019-10-15 03:01:04,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-10-15 03:01:04,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2019-10-15 03:01:04,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-10-15 03:01:04,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2019-10-15 03:01:04,474 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 14 [2019-10-15 03:01:04,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:01:04,475 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2019-10-15 03:01:04,475 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-10-15 03:01:04,475 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2019-10-15 03:01:04,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-10-15 03:01:04,477 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:01:04,477 INFO L380 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:01:04,681 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:01:04,682 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:01:04,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:01:04,682 INFO L82 PathProgramCache]: Analyzing trace with hash -1928773981, now seen corresponding path program 3 times [2019-10-15 03:01:04,683 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:01:04,683 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100533239] [2019-10-15 03:01:04,683 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:01:04,684 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:01:04,684 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:01:04,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:01:04,878 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:01:04,878 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100533239] [2019-10-15 03:01:04,879 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117359083] [2019-10-15 03:01:04,879 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 03:01:04,936 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-15 03:01:04,936 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 03:01:04,937 INFO L256 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-15 03:01:04,939 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:01:04,963 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:01:04,963 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:01:05,180 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:01:05,180 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1062575791] [2019-10-15 03:01:05,181 INFO L162 IcfgInterpreter]: Started Sifa with 11 locations of interest [2019-10-15 03:01:05,182 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 03:01:05,182 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 03:01:05,182 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 03:01:05,183 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 03:01:05,214 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 03:01:05,442 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 34 for LOIs [2019-10-15 03:01:05,452 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 03:01:05,458 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 03:01:06,018 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 03:01:06,018 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13, 9] total 34 [2019-10-15 03:01:06,018 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516867074] [2019-10-15 03:01:06,019 INFO L442 AbstractCegarLoop]: Interpolant automaton has 34 states [2019-10-15 03:01:06,019 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:01:06,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2019-10-15 03:01:06,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=797, Unknown=0, NotChecked=0, Total=1122 [2019-10-15 03:01:06,022 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 34 states. [2019-10-15 03:01:07,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:01:07,734 INFO L93 Difference]: Finished difference Result 38 states and 49 transitions. [2019-10-15 03:01:07,734 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-10-15 03:01:07,734 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 20 [2019-10-15 03:01:07,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:01:07,735 INFO L225 Difference]: With dead ends: 38 [2019-10-15 03:01:07,736 INFO L226 Difference]: Without dead ends: 33 [2019-10-15 03:01:07,738 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 904 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=966, Invalid=2816, Unknown=0, NotChecked=0, Total=3782 [2019-10-15 03:01:07,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-10-15 03:01:07,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2019-10-15 03:01:07,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-10-15 03:01:07,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2019-10-15 03:01:07,746 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 20 [2019-10-15 03:01:07,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:01:07,747 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2019-10-15 03:01:07,747 INFO L463 AbstractCegarLoop]: Interpolant automaton has 34 states. [2019-10-15 03:01:07,747 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2019-10-15 03:01:07,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-10-15 03:01:07,748 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:01:07,748 INFO L380 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:01:07,951 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:01:07,952 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:01:07,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:01:07,953 INFO L82 PathProgramCache]: Analyzing trace with hash 1953340067, now seen corresponding path program 4 times [2019-10-15 03:01:07,954 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:01:07,954 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408458972] [2019-10-15 03:01:07,954 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:01:07,955 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:01:07,955 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:01:08,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:01:08,468 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:01:08,469 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408458972] [2019-10-15 03:01:08,469 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466332101] [2019-10-15 03:01:08,469 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:01:08,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:01:08,538 INFO L256 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 24 conjunts are in the unsatisfiable core [2019-10-15 03:01:08,541 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:01:08,562 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:01:08,562 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:01:09,248 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:01:09,249 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [321042858] [2019-10-15 03:01:09,250 INFO L162 IcfgInterpreter]: Started Sifa with 11 locations of interest [2019-10-15 03:01:09,250 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 03:01:09,251 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 03:01:09,251 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 03:01:09,251 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 03:01:09,284 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 03:01:09,450 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 34 for LOIs [2019-10-15 03:01:09,463 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 03:01:09,472 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 03:01:09,941 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 03:01:09,941 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25, 9] total 58 [2019-10-15 03:01:09,941 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145474737] [2019-10-15 03:01:09,943 INFO L442 AbstractCegarLoop]: Interpolant automaton has 58 states [2019-10-15 03:01:09,943 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:01:09,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2019-10-15 03:01:09,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1201, Invalid=2105, Unknown=0, NotChecked=0, Total=3306 [2019-10-15 03:01:09,946 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 58 states. [2019-10-15 03:01:13,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:01:13,575 INFO L93 Difference]: Finished difference Result 62 states and 85 transitions. [2019-10-15 03:01:13,576 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2019-10-15 03:01:13,576 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 32 [2019-10-15 03:01:13,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:01:13,577 INFO L225 Difference]: With dead ends: 62 [2019-10-15 03:01:13,577 INFO L226 Difference]: Without dead ends: 57 [2019-10-15 03:01:13,580 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2554 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=3594, Invalid=8396, Unknown=0, NotChecked=0, Total=11990 [2019-10-15 03:01:13,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2019-10-15 03:01:13,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2019-10-15 03:01:13,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2019-10-15 03:01:13,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2019-10-15 03:01:13,593 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 32 [2019-10-15 03:01:13,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:01:13,593 INFO L462 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2019-10-15 03:01:13,593 INFO L463 AbstractCegarLoop]: Interpolant automaton has 58 states. [2019-10-15 03:01:13,594 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2019-10-15 03:01:13,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-10-15 03:01:13,595 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:01:13,595 INFO L380 BasicCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:01:13,799 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:01:13,800 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:01:13,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:01:13,800 INFO L82 PathProgramCache]: Analyzing trace with hash -751283549, now seen corresponding path program 5 times [2019-10-15 03:01:13,801 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:01:13,801 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928960267] [2019-10-15 03:01:13,802 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:01:13,802 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:01:13,802 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:01:13,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:01:14,792 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:01:14,792 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928960267] [2019-10-15 03:01:14,793 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1417351473] [2019-10-15 03:01:14,793 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true