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-lit/ddlm2013.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 22:59:02,389 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 22:59:02,392 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 22:59:02,410 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 22:59:02,411 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 22:59:02,413 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 22:59:02,414 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 22:59:02,416 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 22:59:02,418 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 22:59:02,419 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 22:59:02,420 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 22:59:02,421 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 22:59:02,422 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 22:59:02,423 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 22:59:02,424 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 22:59:02,425 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 22:59:02,426 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 22:59:02,427 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 22:59:02,429 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 22:59:02,430 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 22:59:02,432 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 22:59:02,433 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 22:59:02,435 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 22:59:02,436 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 22:59:02,438 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 22:59:02,441 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 22:59:02,442 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 22:59:02,443 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 22:59:02,444 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 22:59:02,445 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 22:59:02,445 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 22:59:02,445 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 22:59:02,446 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 22:59:02,446 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 22:59:02,447 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 22:59:02,448 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 22:59:02,448 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 [2019-10-13 22:59:02,464 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 22:59:02,464 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 22:59:02,465 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 22:59:02,465 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 22:59:02,466 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 22:59:02,466 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 22:59:02,466 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 22:59:02,466 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 22:59:02,466 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 22:59:02,467 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 22:59:02,467 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 22:59:02,467 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 22:59:02,467 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 22:59:02,467 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 22:59:02,468 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 22:59:02,468 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 22:59:02,468 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 22:59:02,468 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 22:59:02,469 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 22:59:02,469 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 22:59:02,469 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 22:59:02,469 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 22:59:02,469 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 22:59:02,470 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 22:59:02,470 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 22:59:02,470 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 22:59:02,470 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 22:59:02,470 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 22:59:02,471 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 [2019-10-13 22:59:02,772 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 22:59:02,790 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 22:59:02,794 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 22:59:02,796 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 22:59:02,796 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 22:59:02,797 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/ddlm2013.i [2019-10-13 22:59:02,879 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1f9cd81d4/515eb6d038624864a0327dfc3f04b3ae/FLAG40931a7f8 [2019-10-13 22:59:03,334 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 22:59:03,335 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/ddlm2013.i [2019-10-13 22:59:03,341 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1f9cd81d4/515eb6d038624864a0327dfc3f04b3ae/FLAG40931a7f8 [2019-10-13 22:59:03,738 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1f9cd81d4/515eb6d038624864a0327dfc3f04b3ae [2019-10-13 22:59:03,749 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 22:59:03,751 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 22:59:03,752 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 22:59:03,752 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 22:59:03,755 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 22:59:03,756 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 10:59:03" (1/1) ... [2019-10-13 22:59:03,759 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@37f266c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:59:03, skipping insertion in model container [2019-10-13 22:59:03,759 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 10:59:03" (1/1) ... [2019-10-13 22:59:03,767 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 22:59:03,787 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 22:59:03,950 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 22:59:03,954 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 22:59:03,971 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 22:59:03,983 INFO L192 MainTranslator]: Completed translation [2019-10-13 22:59:03,984 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:59:03 WrapperNode [2019-10-13 22:59:03,984 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 22:59:03,985 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 22:59:03,985 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 22:59:03,985 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 22:59:04,090 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:59:03" (1/1) ... [2019-10-13 22:59:04,090 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:59:03" (1/1) ... [2019-10-13 22:59:04,096 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:59:03" (1/1) ... [2019-10-13 22:59:04,096 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:59:03" (1/1) ... [2019-10-13 22:59:04,103 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:59:03" (1/1) ... [2019-10-13 22:59:04,112 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:59:03" (1/1) ... [2019-10-13 22:59:04,113 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:59:03" (1/1) ... [2019-10-13 22:59:04,114 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 22:59:04,115 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 22:59:04,115 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 22:59:04,115 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 22:59:04,116 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:59:03" (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 [2019-10-13 22:59:04,171 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 22:59:04,172 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 22:59:04,172 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-13 22:59:04,172 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 22:59:04,172 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 22:59:04,172 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-10-13 22:59:04,173 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-13 22:59:04,173 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 22:59:04,173 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 22:59:04,173 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 22:59:04,173 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 22:59:04,448 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 22:59:04,448 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 22:59:04,450 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 10:59:04 BoogieIcfgContainer [2019-10-13 22:59:04,450 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 22:59:04,451 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 22:59:04,451 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 22:59:04,454 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 22:59:04,455 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 10:59:03" (1/3) ... [2019-10-13 22:59:04,456 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5cc902da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 10:59:04, skipping insertion in model container [2019-10-13 22:59:04,456 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:59:03" (2/3) ... [2019-10-13 22:59:04,456 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5cc902da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 10:59:04, skipping insertion in model container [2019-10-13 22:59:04,456 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 10:59:04" (3/3) ... [2019-10-13 22:59:04,458 INFO L109 eAbstractionObserver]: Analyzing ICFG ddlm2013.i [2019-10-13 22:59:04,469 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 22:59:04,478 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 22:59:04,493 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 22:59:04,528 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 22:59:04,528 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 22:59:04,529 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 22:59:04,529 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 22:59:04,529 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 22:59:04,530 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 22:59:04,530 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 22:59:04,530 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 22:59:04,556 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2019-10-13 22:59:04,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-10-13 22:59:04,564 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 22:59:04,565 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 22:59:04,567 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 22:59:04,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 22:59:04,575 INFO L82 PathProgramCache]: Analyzing trace with hash -1885241407, now seen corresponding path program 1 times [2019-10-13 22:59:04,585 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 22:59:04,586 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614441177] [2019-10-13 22:59:04,586 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 22:59:04,586 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 22:59:04,587 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 22:59:04,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 22:59:04,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 22:59:04,713 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614441177] [2019-10-13 22:59:04,714 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 22:59:04,715 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-10-13 22:59:04,715 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730826965] [2019-10-13 22:59:04,720 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-13 22:59:04,720 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 22:59:04,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-13 22:59:04,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-13 22:59:04,738 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 2 states. [2019-10-13 22:59:04,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 22:59:04,763 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2019-10-13 22:59:04,763 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-13 22:59:04,765 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2019-10-13 22:59:04,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 22:59:04,774 INFO L225 Difference]: With dead ends: 31 [2019-10-13 22:59:04,774 INFO L226 Difference]: Without dead ends: 13 [2019-10-13 22:59:04,778 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 [2019-10-13 22:59:04,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2019-10-13 22:59:04,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2019-10-13 22:59:04,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2019-10-13 22:59:04,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2019-10-13 22:59:04,822 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2019-10-13 22:59:04,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 22:59:04,822 INFO L462 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2019-10-13 22:59:04,823 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-13 22:59:04,823 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2019-10-13 22:59:04,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-10-13 22:59:04,824 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 22:59:04,824 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 22:59:04,824 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 22:59:04,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 22:59:04,825 INFO L82 PathProgramCache]: Analyzing trace with hash -1681236347, now seen corresponding path program 1 times [2019-10-13 22:59:04,825 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 22:59:04,825 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180370045] [2019-10-13 22:59:04,826 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 22:59:04,826 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 22:59:04,826 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 22:59:04,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 22:59:05,145 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 22:59:05,146 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180370045] [2019-10-13 22:59:05,146 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 22:59:05,146 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-13 22:59:05,146 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600037877] [2019-10-13 22:59:05,148 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 22:59:05,149 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 22:59:05,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 22:59:05,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-13 22:59:05,150 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 5 states. [2019-10-13 22:59:05,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 22:59:05,194 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2019-10-13 22:59:05,195 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 22:59:05,195 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2019-10-13 22:59:05,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 22:59:05,196 INFO L225 Difference]: With dead ends: 21 [2019-10-13 22:59:05,196 INFO L226 Difference]: Without dead ends: 15 [2019-10-13 22:59:05,197 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-13 22:59:05,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2019-10-13 22:59:05,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2019-10-13 22:59:05,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-10-13 22:59:05,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2019-10-13 22:59:05,203 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 12 [2019-10-13 22:59:05,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 22:59:05,203 INFO L462 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2019-10-13 22:59:05,203 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 22:59:05,203 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2019-10-13 22:59:05,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-10-13 22:59:05,204 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 22:59:05,204 INFO L380 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 22:59:05,205 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 22:59:05,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 22:59:05,205 INFO L82 PathProgramCache]: Analyzing trace with hash 1288057018, now seen corresponding path program 1 times [2019-10-13 22:59:05,206 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 22:59:05,206 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677989880] [2019-10-13 22:59:05,206 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 22:59:05,207 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 22:59:05,207 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 22:59:05,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 22:59:05,506 WARN L191 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 20 [2019-10-13 22:59:05,613 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 22:59:05,614 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677989880] [2019-10-13 22:59:05,614 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [14090080] [2019-10-13 22:59:05,615 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 [2019-10-13 22:59:05,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 22:59:05,668 INFO L256 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 18 conjunts are in the unsatisfiable core [2019-10-13 22:59:05,675 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 22:59:05,821 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 22:59:05,887 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 22:59:05,887 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 22:59:06,000 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 22:59:06,001 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1106162150] [2019-10-13 22:59:06,052 INFO L162 IcfgInterpreter]: Started Sifa with 13 locations of interest [2019-10-13 22:59:06,053 INFO L169 IcfgInterpreter]: Building call graph [2019-10-13 22:59:06,066 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-13 22:59:06,081 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-13 22:59:06,082 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-13 22:59:06,182 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 1 for LOIs [2019-10-13 22:59:06,522 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2019-10-13 22:59:06,542 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 1 for LOIs [2019-10-13 22:59:06,545 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-13 22:59:06,545 INFO L191 IcfgInterpreter]: Final predicates for locations of interest are: [2019-10-13 22:59:06,546 INFO L193 IcfgInterpreter]: Reachable states at location L25-2 satisfy 128#(and (<= 0 main_~i~0) (<= main_~flag~0 2147483647) (<= 1 main_~j~0) (<= 0 (+ main_~flag~0 2147483648)) (<= 0 main_~a~0)) [2019-10-13 22:59:06,546 INFO L193 IcfgInterpreter]: Reachable states at location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION satisfy 147#(and (or (and (= |__VERIFIER_assert_#in~cond| 0) (= 0 __VERIFIER_assert_~cond) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)) (and (= |__VERIFIER_assert_#in~cond| 1) (= 0 __VERIFIER_assert_~cond) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond))) (<= __VERIFIER_assert_~cond 0) (<= 0 |__VERIFIER_assert_#in~cond|) (<= |__VERIFIER_assert_#in~cond| 0) (<= 0 __VERIFIER_assert_~cond)) [2019-10-13 22:59:06,546 INFO L193 IcfgInterpreter]: Reachable states at location ULTIMATE.initFINAL satisfy 151#true [2019-10-13 22:59:06,547 INFO L193 IcfgInterpreter]: Reachable states at location L4 satisfy 137#(and (or (and (<= __VERIFIER_assert_~cond 0) (<= 0 |__VERIFIER_assert_#in~cond|) (<= |__VERIFIER_assert_#in~cond| 0) (<= 0 __VERIFIER_assert_~cond)) (and (<= 1 __VERIFIER_assert_~cond) (<= 1 |__VERIFIER_assert_#in~cond|) (<= __VERIFIER_assert_~cond 1) (<= |__VERIFIER_assert_#in~cond| 1))) (or (and (= |__VERIFIER_assert_#in~cond| 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)) (and (= |__VERIFIER_assert_#in~cond| 1) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)))) [2019-10-13 22:59:06,547 INFO L193 IcfgInterpreter]: Reachable states at location L-1 satisfy 23#true [2019-10-13 22:59:06,547 INFO L193 IcfgInterpreter]: Reachable states at location mainENTRY satisfy 33#true [2019-10-13 22:59:06,547 INFO L193 IcfgInterpreter]: Reachable states at location ULTIMATE.initEXIT satisfy 156#true [2019-10-13 22:59:06,548 INFO L193 IcfgInterpreter]: Reachable states at location ULTIMATE.startENTRY satisfy 6#true [2019-10-13 22:59:06,548 INFO L193 IcfgInterpreter]: Reachable states at location L5 satisfy 142#(and (or (and (= |__VERIFIER_assert_#in~cond| 0) (= 0 __VERIFIER_assert_~cond) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)) (and (= |__VERIFIER_assert_#in~cond| 1) (= 0 __VERIFIER_assert_~cond) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond))) (<= __VERIFIER_assert_~cond 0) (<= 0 |__VERIFIER_assert_#in~cond|) (<= |__VERIFIER_assert_#in~cond| 0) (<= 0 __VERIFIER_assert_~cond)) [2019-10-13 22:59:06,548 INFO L193 IcfgInterpreter]: Reachable states at location L21-2 satisfy 109#(and (<= 0 main_~i~0) (<= main_~flag~0 2147483647) (<= 1 main_~j~0) (<= 0 (+ main_~flag~0 2147483648)) (<= 0 main_~a~0)) [2019-10-13 22:59:06,548 INFO L193 IcfgInterpreter]: Reachable states at location __VERIFIER_assertENTRY satisfy 132#(and (or (and (<= 1 |__VERIFIER_assert_#in~cond|) (<= |__VERIFIER_assert_#in~cond| 1)) (and (<= 0 |__VERIFIER_assert_#in~cond|) (<= |__VERIFIER_assert_#in~cond| 0))) (or (= |__VERIFIER_assert_#in~cond| 0) (= |__VERIFIER_assert_#in~cond| 1))) [2019-10-13 22:59:06,549 INFO L193 IcfgInterpreter]: Reachable states at location L21 satisfy 104#(and (<= 0 (+ |main_#t~nondet2| 2147483648)) (<= 0 main_~i~0) (<= main_~flag~0 2147483647) (<= 1 main_~j~0) (<= 0 (+ main_~flag~0 2147483648)) (<= 0 main_~a~0) (<= |main_#t~nondet2| 2147483647)) [2019-10-13 22:59:06,549 INFO L193 IcfgInterpreter]: Reachable states at location L32 satisfy 114#(and (<= 0 main_~i~0) (<= main_~flag~0 2147483647) (<= 1 main_~j~0) (<= 0 (+ main_~flag~0 2147483648)) (<= 0 main_~a~0) (not (= main_~flag~0 0))) [2019-10-13 22:59:06,808 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-13 22:59:06,809 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7] total 21 [2019-10-13 22:59:06,809 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152934651] [2019-10-13 22:59:06,810 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-10-13 22:59:06,811 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 22:59:06,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-10-13 22:59:06,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2019-10-13 22:59:06,814 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 21 states. [2019-10-13 22:59:07,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 22:59:07,544 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2019-10-13 22:59:07,545 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-10-13 22:59:07,545 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 14 [2019-10-13 22:59:07,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 22:59:07,546 INFO L225 Difference]: With dead ends: 27 [2019-10-13 22:59:07,546 INFO L226 Difference]: Without dead ends: 19 [2019-10-13 22:59:07,547 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=155, Invalid=715, Unknown=0, NotChecked=0, Total=870 [2019-10-13 22:59:07,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2019-10-13 22:59:07,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2019-10-13 22:59:07,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-10-13 22:59:07,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2019-10-13 22:59:07,552 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 14 [2019-10-13 22:59:07,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 22:59:07,552 INFO L462 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2019-10-13 22:59:07,552 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-10-13 22:59:07,553 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2019-10-13 22:59:07,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-10-13 22:59:07,553 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 22:59:07,553 INFO L380 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 22:59:07,759 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 22:59:07,759 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 22:59:07,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 22:59:07,760 INFO L82 PathProgramCache]: Analyzing trace with hash -71042716, now seen corresponding path program 2 times [2019-10-13 22:59:07,760 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 22:59:07,761 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66072984] [2019-10-13 22:59:07,761 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 22:59:07,761 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 22:59:07,762 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 22:59:07,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 22:59:08,396 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 22:59:08,397 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66072984] [2019-10-13 22:59:08,397 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913459068] [2019-10-13 22:59:08,397 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 [2019-10-13 22:59:08,454 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-10-13 22:59:08,455 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 22:59:08,457 INFO L256 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 32 conjunts are in the unsatisfiable core [2019-10-13 22:59:08,459 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 22:59:08,898 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 22:59:08,899 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 22:59:13,509 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 22:59:13,510 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1203523819] [2019-10-13 22:59:13,511 INFO L162 IcfgInterpreter]: Started Sifa with 13 locations of interest [2019-10-13 22:59:13,511 INFO L169 IcfgInterpreter]: Building call graph [2019-10-13 22:59:13,512 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-13 22:59:13,512 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-13 22:59:13,512 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-13 22:59:13,529 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 1 for LOIs [2019-10-13 22:59:13,709 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2019-10-13 22:59:13,748 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 1 for LOIs [2019-10-13 22:59:13,753 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-13 22:59:13,753 INFO L191 IcfgInterpreter]: Final predicates for locations of interest are: [2019-10-13 22:59:13,753 INFO L193 IcfgInterpreter]: Reachable states at location L25-2 satisfy 128#(and (<= 0 main_~i~0) (<= main_~flag~0 2147483647) (<= 1 main_~j~0) (<= 0 (+ main_~flag~0 2147483648)) (<= 0 main_~a~0)) [2019-10-13 22:59:13,754 INFO L193 IcfgInterpreter]: Reachable states at location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION satisfy 147#(and (or (and (= |__VERIFIER_assert_#in~cond| 0) (= 0 __VERIFIER_assert_~cond) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)) (and (= |__VERIFIER_assert_#in~cond| 1) (= 0 __VERIFIER_assert_~cond) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond))) (<= __VERIFIER_assert_~cond 0) (<= 0 |__VERIFIER_assert_#in~cond|) (<= |__VERIFIER_assert_#in~cond| 0) (<= 0 __VERIFIER_assert_~cond)) [2019-10-13 22:59:13,754 INFO L193 IcfgInterpreter]: Reachable states at location ULTIMATE.initFINAL satisfy 151#true [2019-10-13 22:59:13,755 INFO L193 IcfgInterpreter]: Reachable states at location L4 satisfy 137#(and (or (and (<= __VERIFIER_assert_~cond 0) (<= 0 |__VERIFIER_assert_#in~cond|) (<= |__VERIFIER_assert_#in~cond| 0) (<= 0 __VERIFIER_assert_~cond)) (and (<= 1 __VERIFIER_assert_~cond) (<= 1 |__VERIFIER_assert_#in~cond|) (<= __VERIFIER_assert_~cond 1) (<= |__VERIFIER_assert_#in~cond| 1))) (or (and (= |__VERIFIER_assert_#in~cond| 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)) (and (= |__VERIFIER_assert_#in~cond| 1) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)))) [2019-10-13 22:59:13,755 INFO L193 IcfgInterpreter]: Reachable states at location L-1 satisfy 23#true [2019-10-13 22:59:13,756 INFO L193 IcfgInterpreter]: Reachable states at location mainENTRY satisfy 33#true [2019-10-13 22:59:13,756 INFO L193 IcfgInterpreter]: Reachable states at location ULTIMATE.initEXIT satisfy 156#true [2019-10-13 22:59:13,757 INFO L193 IcfgInterpreter]: Reachable states at location ULTIMATE.startENTRY satisfy 6#true [2019-10-13 22:59:13,757 INFO L193 IcfgInterpreter]: Reachable states at location L5 satisfy 142#(and (or (and (= |__VERIFIER_assert_#in~cond| 0) (= 0 __VERIFIER_assert_~cond) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)) (and (= |__VERIFIER_assert_#in~cond| 1) (= 0 __VERIFIER_assert_~cond) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond))) (<= __VERIFIER_assert_~cond 0) (<= 0 |__VERIFIER_assert_#in~cond|) (<= |__VERIFIER_assert_#in~cond| 0) (<= 0 __VERIFIER_assert_~cond)) [2019-10-13 22:59:13,757 INFO L193 IcfgInterpreter]: Reachable states at location L21-2 satisfy 109#(and (<= 0 main_~i~0) (<= main_~flag~0 2147483647) (<= 1 main_~j~0) (<= 0 (+ main_~flag~0 2147483648)) (<= 0 main_~a~0)) [2019-10-13 22:59:13,759 INFO L193 IcfgInterpreter]: Reachable states at location __VERIFIER_assertENTRY satisfy 132#(and (or (and (<= 1 |__VERIFIER_assert_#in~cond|) (<= |__VERIFIER_assert_#in~cond| 1)) (and (<= 0 |__VERIFIER_assert_#in~cond|) (<= |__VERIFIER_assert_#in~cond| 0))) (or (= |__VERIFIER_assert_#in~cond| 1) (= |__VERIFIER_assert_#in~cond| 0))) [2019-10-13 22:59:13,760 INFO L193 IcfgInterpreter]: Reachable states at location L21 satisfy 104#(and (<= 0 (+ |main_#t~nondet2| 2147483648)) (<= 0 main_~i~0) (<= main_~flag~0 2147483647) (<= 1 main_~j~0) (<= 0 (+ main_~flag~0 2147483648)) (<= 0 main_~a~0) (<= |main_#t~nondet2| 2147483647)) [2019-10-13 22:59:13,760 INFO L193 IcfgInterpreter]: Reachable states at location L32 satisfy 114#(and (<= 0 main_~i~0) (<= main_~flag~0 2147483647) (<= 1 main_~j~0) (<= 0 (+ main_~flag~0 2147483648)) (<= 0 main_~a~0) (not (= main_~flag~0 0))) [2019-10-13 22:59:14,068 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-13 22:59:14,069 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 7] total 27 [2019-10-13 22:59:14,069 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534628799] [2019-10-13 22:59:14,070 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-10-13 22:59:14,070 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 22:59:14,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-10-13 22:59:14,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=608, Unknown=1, NotChecked=0, Total=702 [2019-10-13 22:59:14,072 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 27 states. [2019-10-13 22:59:14,591 WARN L191 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 43 [2019-10-13 22:59:14,732 WARN L191 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 47 [2019-10-13 22:59:17,043 WARN L191 SmtUtils]: Spent 2.24 s on a formula simplification. DAG size of input: 76 DAG size of output: 54 [2019-10-13 22:59:17,579 WARN L191 SmtUtils]: Spent 500.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 58 [2019-10-13 22:59:35,859 WARN L191 SmtUtils]: Spent 15.32 s on a formula simplification. DAG size of input: 65 DAG size of output: 34 [2019-10-13 22:59:50,244 WARN L191 SmtUtils]: Spent 11.33 s on a formula simplification. DAG size of input: 69 DAG size of output: 38