/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/array-examples/standard_compareModified_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 23:02:54,284 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 23:02:54,289 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 23:02:54,308 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 23:02:54,308 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 23:02:54,310 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 23:02:54,312 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 23:02:54,324 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 23:02:54,326 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 23:02:54,328 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 23:02:54,330 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 23:02:54,332 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 23:02:54,332 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 23:02:54,336 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 23:02:54,337 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 23:02:54,339 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 23:02:54,340 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 23:02:54,344 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 23:02:54,345 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 23:02:54,350 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 23:02:54,352 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 23:02:54,356 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 23:02:54,358 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 23:02:54,359 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 23:02:54,361 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 23:02:54,367 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-23 23:02:54,367 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-23 23:02:54,368 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-23 23:02:54,369 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-23 23:02:54,372 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-23 23:02:54,373 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-23 23:02:54,373 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-23 23:02:54,373 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-23 23:02:54,374 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 23:02:54,374 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 23:02:54,376 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 23:02:54,376 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 [2019-11-23 23:02:54,395 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 23:02:54,395 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 23:02:54,396 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-23 23:02:54,397 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-23 23:02:54,397 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-23 23:02:54,397 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-23 23:02:54,397 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-23 23:02:54,397 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-23 23:02:54,398 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-23 23:02:54,398 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-23 23:02:54,399 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-23 23:02:54,399 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-23 23:02:54,399 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-23 23:02:54,400 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-23 23:02:54,400 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-23 23:02:54,401 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 23:02:54,401 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 23:02:54,402 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 23:02:54,402 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 23:02:54,402 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 23:02:54,402 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 23:02:54,402 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 23:02:54,402 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 23:02:54,403 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 23:02:54,403 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 23:02:54,403 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 23:02:54,403 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 23:02:54,403 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 23:02:54,405 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 23:02:54,405 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 23:02:54,405 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 23:02:54,405 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 23:02:54,406 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 23:02:54,406 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-23 23:02:54,406 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 23:02:54,407 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 23:02:54,407 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 23:02:54,407 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-23 23:02:54,667 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 23:02:54,685 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 23:02:54,688 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 23:02:54,690 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 23:02:54,690 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 23:02:54,691 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_compareModified_ground.i [2019-11-23 23:02:54,762 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d1d5edd43/39bd186142d24c5cb4757caa62f51219/FLAG4b41a7034 [2019-11-23 23:02:55,221 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 23:02:55,222 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_compareModified_ground.i [2019-11-23 23:02:55,228 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d1d5edd43/39bd186142d24c5cb4757caa62f51219/FLAG4b41a7034 [2019-11-23 23:02:55,629 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d1d5edd43/39bd186142d24c5cb4757caa62f51219 [2019-11-23 23:02:55,640 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 23:02:55,642 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 23:02:55,644 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 23:02:55,644 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 23:02:55,648 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 23:02:55,649 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 11:02:55" (1/1) ... [2019-11-23 23:02:55,652 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a32c64f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:02:55, skipping insertion in model container [2019-11-23 23:02:55,653 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 11:02:55" (1/1) ... [2019-11-23 23:02:55,661 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 23:02:55,676 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 23:02:55,876 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 23:02:55,881 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 23:02:55,902 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 23:02:55,919 INFO L208 MainTranslator]: Completed translation [2019-11-23 23:02:55,919 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:02:55 WrapperNode [2019-11-23 23:02:55,920 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 23:02:55,920 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 23:02:55,920 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 23:02:55,920 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 23:02:55,927 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:02:55" (1/1) ... [2019-11-23 23:02:56,020 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:02:55" (1/1) ... [2019-11-23 23:02:56,043 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 23:02:56,044 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 23:02:56,044 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 23:02:56,044 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 23:02:56,053 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:02:55" (1/1) ... [2019-11-23 23:02:56,053 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:02:55" (1/1) ... [2019-11-23 23:02:56,055 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:02:55" (1/1) ... [2019-11-23 23:02:56,056 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:02:55" (1/1) ... [2019-11-23 23:02:56,062 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:02:55" (1/1) ... [2019-11-23 23:02:56,072 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:02:55" (1/1) ... [2019-11-23 23:02:56,073 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:02:55" (1/1) ... [2019-11-23 23:02:56,075 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 23:02:56,076 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 23:02:56,077 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 23:02:56,077 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 23:02:56,078 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:02:55" (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 [2019-11-23 23:02:56,147 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 23:02:56,147 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 23:02:56,147 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 23:02:56,148 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 23:02:56,148 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 23:02:56,148 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 23:02:56,583 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 23:02:56,584 INFO L284 CfgBuilder]: Removed 12 assume(true) statements. [2019-11-23 23:02:56,585 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 11:02:56 BoogieIcfgContainer [2019-11-23 23:02:56,585 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 23:02:56,586 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 23:02:56,586 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 23:02:56,589 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 23:02:56,589 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 11:02:55" (1/3) ... [2019-11-23 23:02:56,590 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@586f9b21 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 11:02:56, skipping insertion in model container [2019-11-23 23:02:56,590 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:02:55" (2/3) ... [2019-11-23 23:02:56,591 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@586f9b21 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 11:02:56, skipping insertion in model container [2019-11-23 23:02:56,591 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 11:02:56" (3/3) ... [2019-11-23 23:02:56,593 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_compareModified_ground.i [2019-11-23 23:02:56,600 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 23:02:56,606 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2019-11-23 23:02:56,616 INFO L249 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2019-11-23 23:02:56,634 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 23:02:56,634 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 23:02:56,634 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 23:02:56,634 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 23:02:56,634 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 23:02:56,634 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 23:02:56,635 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 23:02:56,635 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 23:02:56,648 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states. [2019-11-23 23:02:56,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-11-23 23:02:56,654 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 23:02:56,654 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-11-23 23:02:56,655 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 23:02:56,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 23:02:56,661 INFO L82 PathProgramCache]: Analyzing trace with hash 621068702, now seen corresponding path program 1 times [2019-11-23 23:02:56,671 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 23:02:56,671 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228125406] [2019-11-23 23:02:56,671 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 23:02:56,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:02:56,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 23:02:56,808 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228125406] [2019-11-23 23:02:56,809 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 23:02:56,809 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-23 23:02:56,810 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036683232] [2019-11-23 23:02:56,815 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 23:02:56,816 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 23:02:56,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 23:02:56,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 23:02:56,832 INFO L87 Difference]: Start difference. First operand 16 states. Second operand 3 states. [2019-11-23 23:02:56,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 23:02:56,867 INFO L93 Difference]: Finished difference Result 31 states and 43 transitions. [2019-11-23 23:02:56,870 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 23:02:56,872 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2019-11-23 23:02:56,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 23:02:56,881 INFO L225 Difference]: With dead ends: 31 [2019-11-23 23:02:56,882 INFO L226 Difference]: Without dead ends: 16 [2019-11-23 23:02:56,885 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 [2019-11-23 23:02:56,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2019-11-23 23:02:56,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2019-11-23 23:02:56,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-11-23 23:02:56,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 20 transitions. [2019-11-23 23:02:56,922 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 20 transitions. Word has length 7 [2019-11-23 23:02:56,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 23:02:56,923 INFO L462 AbstractCegarLoop]: Abstraction has 16 states and 20 transitions. [2019-11-23 23:02:56,923 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 23:02:56,923 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 20 transitions. [2019-11-23 23:02:56,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-23 23:02:56,924 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 23:02:56,924 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 23:02:56,925 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 23:02:56,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 23:02:56,925 INFO L82 PathProgramCache]: Analyzing trace with hash -616931547, now seen corresponding path program 1 times [2019-11-23 23:02:56,926 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 23:02:56,926 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960310592] [2019-11-23 23:02:56,926 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 23:02:56,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:02:56,977 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 23:02:56,978 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960310592] [2019-11-23 23:02:56,978 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643604579] [2019-11-23 23:02:56,978 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 [2019-11-23 23:02:57,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:02:57,045 INFO L255 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-23 23:02:57,052 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 23:02:57,081 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 23:02:57,081 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-23 23:02:57,095 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 23:02:57,099 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-23 23:02:57,099 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [3] total 5 [2019-11-23 23:02:57,100 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904554820] [2019-11-23 23:02:57,102 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 23:02:57,103 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 23:02:57,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 23:02:57,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-23 23:02:57,104 INFO L87 Difference]: Start difference. First operand 16 states and 20 transitions. Second operand 4 states. [2019-11-23 23:02:57,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 23:02:57,125 INFO L93 Difference]: Finished difference Result 30 states and 38 transitions. [2019-11-23 23:02:57,127 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 23:02:57,127 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2019-11-23 23:02:57,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 23:02:57,128 INFO L225 Difference]: With dead ends: 30 [2019-11-23 23:02:57,128 INFO L226 Difference]: Without dead ends: 18 [2019-11-23 23:02:57,130 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-23 23:02:57,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2019-11-23 23:02:57,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2019-11-23 23:02:57,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-11-23 23:02:57,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2019-11-23 23:02:57,140 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 8 [2019-11-23 23:02:57,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 23:02:57,141 INFO L462 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2019-11-23 23:02:57,141 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 23:02:57,141 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2019-11-23 23:02:57,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-23 23:02:57,143 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 23:02:57,143 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 23:02:57,348 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 23:02:57,356 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 23:02:57,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 23:02:57,357 INFO L82 PathProgramCache]: Analyzing trace with hash -1434320891, now seen corresponding path program 1 times [2019-11-23 23:02:57,357 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 23:02:57,357 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279162345] [2019-11-23 23:02:57,357 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 23:02:57,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:02:57,407 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-23 23:02:57,407 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279162345] [2019-11-23 23:02:57,407 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [280358613] [2019-11-23 23:02:57,408 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2019-11-23 23:02:57,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:02:57,461 INFO L255 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 23:02:57,462 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 23:02:57,466 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-23 23:02:57,466 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-23 23:02:57,496 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-23 23:02:57,497 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1497528233] [2019-11-23 23:02:57,549 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2019-11-23 23:02:57,549 INFO L166 IcfgInterpreter]: Building call graph [2019-11-23 23:02:57,555 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-23 23:02:57,561 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-23 23:02:57,562 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-23 23:02:57,848 WARN L192 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 25 [2019-11-23 23:02:58,950 WARN L192 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 142 [2019-11-23 23:02:59,556 WARN L192 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2019-11-23 23:02:59,676 WARN L192 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 168 DAG size of output: 163 [2019-11-23 23:02:59,803 WARN L192 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 163 [2019-11-23 23:03:00,748 WARN L192 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 189 DAG size of output: 182 [2019-11-23 23:03:00,872 WARN L192 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 182 [2019-11-23 23:03:01,059 WARN L192 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2019-11-23 23:03:01,205 WARN L192 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 189 [2019-11-23 23:03:01,494 WARN L192 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 192 DAG size of output: 192 [2019-11-23 23:03:03,633 WARN L192 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 214 DAG size of output: 212 [2019-11-23 23:03:03,904 WARN L192 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 196 [2019-11-23 23:03:06,011 WARN L192 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 214 [2019-11-23 23:03:06,261 WARN L192 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 200 [2019-11-23 23:03:08,271 WARN L192 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 219 DAG size of output: 218 [2019-11-23 23:03:12,811 WARN L192 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 224 DAG size of output: 223 [2019-11-23 23:03:13,034 WARN L192 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2019-11-23 23:03:13,196 WARN L192 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 213 DAG size of output: 209 [2019-11-23 23:03:16,297 WARN L192 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 237 DAG size of output: 235 [2019-11-23 23:03:19,729 WARN L192 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 243 DAG size of output: 242 [2019-11-23 23:03:23,202 WARN L192 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 251 DAG size of output: 250 [2019-11-23 23:03:26,528 WARN L192 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 252 [2019-11-23 23:03:30,246 WARN L192 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 261 DAG size of output: 260 [2019-11-23 23:03:33,927 WARN L192 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 264 DAG size of output: 262 [2019-11-23 23:03:37,576 WARN L192 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 265 DAG size of output: 264 [2019-11-23 23:03:41,312 WARN L192 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 268 DAG size of output: 267 [2019-11-23 23:03:45,123 WARN L192 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 270 [2019-11-23 23:03:45,272 WARN L192 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 252 [2019-11-23 23:03:45,409 WARN L192 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 253 DAG size of output: 250 [2019-11-23 23:03:49,405 WARN L192 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 279 DAG size of output: 275 [2019-11-23 23:03:53,664 WARN L192 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 282 DAG size of output: 281 [2019-11-23 23:03:53,879 WARN L192 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 260 DAG size of output: 258 [2019-11-23 23:03:58,511 WARN L192 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 291 DAG size of output: 290 [2019-11-23 23:03:58,742 WARN L192 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 266 DAG size of output: 264 [2019-11-23 23:04:03,896 WARN L192 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 296 DAG size of output: 294 [2019-11-23 23:04:08,786 WARN L192 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 300 DAG size of output: 298 [2019-11-23 23:04:09,036 WARN L192 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 277 DAG size of output: 276 [2019-11-23 23:04:13,969 WARN L192 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 301 DAG size of output: 300 [2019-11-23 23:04:14,223 WARN L192 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 280 DAG size of output: 277 [2019-11-23 23:04:20,030 WARN L192 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 310 DAG size of output: 309 [2019-11-23 23:04:20,179 WARN L192 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2019-11-23 23:04:25,715 WARN L192 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 312 DAG size of output: 310 [2019-11-23 23:04:25,950 WARN L192 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 287 DAG size of output: 286