/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -i ../../../trunk/examples/svcomp/loop-acceleration/array_4.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-24 04:14:22,362 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-24 04:14:22,364 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-24 04:14:22,376 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-24 04:14:22,376 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-24 04:14:22,377 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-24 04:14:22,379 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-24 04:14:22,380 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-24 04:14:22,382 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-24 04:14:22,383 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-24 04:14:22,384 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-24 04:14:22,385 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-24 04:14:22,385 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-24 04:14:22,386 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-24 04:14:22,387 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-24 04:14:22,388 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-24 04:14:22,389 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-24 04:14:22,390 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-24 04:14:22,391 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-24 04:14:22,393 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-24 04:14:22,394 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-24 04:14:22,395 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-24 04:14:22,397 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-24 04:14:22,397 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-24 04:14:22,399 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-24 04:14:22,402 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-24 04:14:22,403 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-24 04:14:22,404 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-24 04:14:22,404 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-24 04:14:22,405 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-24 04:14:22,406 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-24 04:14:22,406 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-24 04:14:22,406 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-24 04:14:22,407 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-24 04:14:22,407 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-24 04:14:22,408 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-24 04:14:22,409 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2019-11-24 04:14:22,423 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-24 04:14:22,423 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-24 04:14:22,424 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-24 04:14:22,424 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-24 04:14:22,425 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-24 04:14:22,425 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-24 04:14:22,425 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-24 04:14:22,425 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-24 04:14:22,425 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-24 04:14:22,425 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-24 04:14:22,426 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-24 04:14:22,426 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-24 04:14:22,426 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-24 04:14:22,426 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-24 04:14:22,427 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-24 04:14:22,427 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-24 04:14:22,427 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-24 04:14:22,428 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-24 04:14:22,428 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-24 04:14:22,428 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-24 04:14:22,428 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-24 04:14:22,428 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-24 04:14:22,428 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-24 04:14:22,429 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-24 04:14:22,429 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-24 04:14:22,429 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-24 04:14:22,429 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-24 04:14:22,429 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-24 04:14:22,430 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-24 04:14:22,430 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-24 04:14:22,430 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-24 04:14:22,430 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-24 04:14:22,430 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-24 04:14:22,431 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-24 04:14:22,431 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-24 04:14:22,431 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-24 04:14:22,431 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-24 04:14:22,431 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-24 04:14:22,709 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-24 04:14:22,723 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-24 04:14:22,727 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-24 04:14:22,729 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-24 04:14:22,729 INFO L275 PluginConnector]: CDTParser initialized [2019-11-24 04:14:22,730 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/array_4.i [2019-11-24 04:14:22,802 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bfea46997/8a2280f4793c4dbb9c9036c79f591181/FLAG25034a7ac [2019-11-24 04:14:23,248 INFO L306 CDTParser]: Found 1 translation units. [2019-11-24 04:14:23,249 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/array_4.i [2019-11-24 04:14:23,255 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bfea46997/8a2280f4793c4dbb9c9036c79f591181/FLAG25034a7ac [2019-11-24 04:14:23,618 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bfea46997/8a2280f4793c4dbb9c9036c79f591181 [2019-11-24 04:14:23,628 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-24 04:14:23,630 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-24 04:14:23,631 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-24 04:14:23,631 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-24 04:14:23,634 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-24 04:14:23,635 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 04:14:23" (1/1) ... [2019-11-24 04:14:23,638 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1edaf0e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:14:23, skipping insertion in model container [2019-11-24 04:14:23,638 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 04:14:23" (1/1) ... [2019-11-24 04:14:23,646 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-24 04:14:23,662 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-24 04:14:23,829 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 04:14:23,836 INFO L203 MainTranslator]: Completed pre-run [2019-11-24 04:14:23,860 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 04:14:23,878 INFO L208 MainTranslator]: Completed translation [2019-11-24 04:14:23,878 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:14:23 WrapperNode [2019-11-24 04:14:23,879 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-24 04:14:23,879 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-24 04:14:23,879 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-24 04:14:23,879 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-24 04:14:23,885 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:14:23" (1/1) ... [2019-11-24 04:14:23,892 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:14:23" (1/1) ... [2019-11-24 04:14:23,997 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-24 04:14:23,998 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-24 04:14:23,998 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-24 04:14:23,998 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-24 04:14:24,005 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:14:23" (1/1) ... [2019-11-24 04:14:24,005 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:14:23" (1/1) ... [2019-11-24 04:14:24,006 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:14:23" (1/1) ... [2019-11-24 04:14:24,007 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:14:23" (1/1) ... [2019-11-24 04:14:24,011 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:14:23" (1/1) ... [2019-11-24 04:14:24,015 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:14:23" (1/1) ... [2019-11-24 04:14:24,016 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:14:23" (1/1) ... [2019-11-24 04:14:24,018 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-24 04:14:24,018 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-24 04:14:24,018 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-24 04:14:24,019 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-24 04:14:24,019 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:14:23" (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 [2019-11-24 04:14:24,075 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-24 04:14:24,075 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-24 04:14:24,076 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-24 04:14:24,076 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-24 04:14:24,076 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-24 04:14:24,076 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-24 04:14:24,405 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-24 04:14:24,405 INFO L284 CfgBuilder]: Removed 8 assume(true) statements. [2019-11-24 04:14:24,406 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 04:14:24 BoogieIcfgContainer [2019-11-24 04:14:24,407 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-24 04:14:24,408 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-24 04:14:24,408 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-24 04:14:24,411 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-24 04:14:24,411 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 04:14:23" (1/3) ... [2019-11-24 04:14:24,412 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d990fce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 04:14:24, skipping insertion in model container [2019-11-24 04:14:24,412 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:14:23" (2/3) ... [2019-11-24 04:14:24,412 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d990fce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 04:14:24, skipping insertion in model container [2019-11-24 04:14:24,413 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 04:14:24" (3/3) ... [2019-11-24 04:14:24,414 INFO L109 eAbstractionObserver]: Analyzing ICFG array_4.i [2019-11-24 04:14:24,424 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-24 04:14:24,431 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-24 04:14:24,441 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-24 04:14:24,462 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-24 04:14:24,463 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-24 04:14:24,463 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-24 04:14:24,463 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-24 04:14:24,463 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-24 04:14:24,463 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-24 04:14:24,463 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-24 04:14:24,463 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-24 04:14:24,474 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states. [2019-11-24 04:14:24,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-11-24 04:14:24,480 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:14:24,481 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-11-24 04:14:24,481 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:14:24,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:14:24,485 INFO L82 PathProgramCache]: Analyzing trace with hash -2041604757, now seen corresponding path program 1 times [2019-11-24 04:14:24,492 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:14:24,493 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455767682] [2019-11-24 04:14:24,493 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:14:24,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:14:24,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:14:24,628 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455767682] [2019-11-24 04:14:24,629 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:14:24,629 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-24 04:14:24,630 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381856231] [2019-11-24 04:14:24,635 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 04:14:24,635 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:14:24,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 04:14:24,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 04:14:24,647 INFO L87 Difference]: Start difference. First operand 10 states. Second operand 3 states. [2019-11-24 04:14:24,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:14:24,682 INFO L93 Difference]: Finished difference Result 27 states and 35 transitions. [2019-11-24 04:14:24,683 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 04:14:24,684 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2019-11-24 04:14:24,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:14:24,692 INFO L225 Difference]: With dead ends: 27 [2019-11-24 04:14:24,692 INFO L226 Difference]: Without dead ends: 15 [2019-11-24 04:14:24,695 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 04:14:24,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2019-11-24 04:14:24,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 9. [2019-11-24 04:14:24,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2019-11-24 04:14:24,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2019-11-24 04:14:24,726 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 6 [2019-11-24 04:14:24,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:14:24,726 INFO L462 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2019-11-24 04:14:24,726 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 04:14:24,727 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2019-11-24 04:14:24,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-24 04:14:24,727 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:14:24,727 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:14:24,728 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:14:24,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:14:24,728 INFO L82 PathProgramCache]: Analyzing trace with hash -1196647922, now seen corresponding path program 1 times [2019-11-24 04:14:24,728 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:14:24,728 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513440723] [2019-11-24 04:14:24,729 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:14:24,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:14:24,790 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-24 04:14:24,791 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513440723] [2019-11-24 04:14:24,791 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:14:24,791 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-24 04:14:24,792 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17245587] [2019-11-24 04:14:24,793 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-24 04:14:24,793 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:14:24,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-24 04:14:24,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-24 04:14:24,794 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand 4 states. [2019-11-24 04:14:24,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:14:24,848 INFO L93 Difference]: Finished difference Result 15 states and 16 transitions. [2019-11-24 04:14:24,849 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-24 04:14:24,849 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2019-11-24 04:14:24,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:14:24,850 INFO L225 Difference]: With dead ends: 15 [2019-11-24 04:14:24,850 INFO L226 Difference]: Without dead ends: 11 [2019-11-24 04:14:24,851 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-24 04:14:24,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2019-11-24 04:14:24,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2019-11-24 04:14:24,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2019-11-24 04:14:24,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2019-11-24 04:14:24,855 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 8 [2019-11-24 04:14:24,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:14:24,856 INFO L462 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2019-11-24 04:14:24,856 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-24 04:14:24,856 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2019-11-24 04:14:24,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-24 04:14:24,857 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:14:24,857 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:14:24,858 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:14:24,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:14:24,858 INFO L82 PathProgramCache]: Analyzing trace with hash 1777820914, now seen corresponding path program 1 times [2019-11-24 04:14:24,859 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:14:24,859 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350636993] [2019-11-24 04:14:24,859 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:14:24,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:14:24,944 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-24 04:14:24,944 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350636993] [2019-11-24 04:14:24,946 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [939308750] [2019-11-24 04:14:24,946 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 [2019-11-24 04:14:24,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:14:24,989 INFO L255 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-24 04:14:24,995 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-24 04:14:25,027 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-24 04:14:25,027 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-24 04:14:25,059 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-24 04:14:25,059 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [152252664] [2019-11-24 04:14:25,081 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2019-11-24 04:14:25,081 INFO L166 IcfgInterpreter]: Building call graph [2019-11-24 04:14:25,088 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-24 04:14:25,094 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-24 04:14:25,095 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-24 04:15:02,299 WARN L192 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 263 [2019-11-24 04:15:02,474 WARN L192 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 264 DAG size of output: 264 [2019-11-24 04:15:06,065 WARN L192 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 276 DAG size of output: 273 [2019-11-24 04:15:28,055 WARN L192 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 317 DAG size of output: 314 [2019-11-24 04:15:28,211 WARN L192 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 315 DAG size of output: 313 [2019-11-24 04:15:38,362 WARN L192 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 333 [2019-11-24 04:15:40,663 WARN L192 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 340 DAG size of output: 339 [2019-11-24 04:15:48,504 WARN L192 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 349 DAG size of output: 347 [2019-11-24 04:15:53,536 WARN L192 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 357 DAG size of output: 353