/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_two_index_06.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 23:15:50,471 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 23:15:50,474 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 23:15:50,491 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 23:15:50,492 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 23:15:50,493 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 23:15:50,494 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 23:15:50,496 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 23:15:50,498 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 23:15:50,499 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 23:15:50,500 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 23:15:50,501 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 23:15:50,501 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 23:15:50,502 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 23:15:50,505 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 23:15:50,506 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 23:15:50,508 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 23:15:50,512 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 23:15:50,513 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 23:15:50,518 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 23:15:50,521 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 23:15:50,525 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 23:15:50,526 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 23:15:50,528 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 23:15:50,530 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 23:15:50,535 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-23 23:15:50,537 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-23 23:15:50,539 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-23 23:15:50,540 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-23 23:15:50,543 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-23 23:15:50,543 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-23 23:15:50,544 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-23 23:15:50,544 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-23 23:15:50,545 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 23:15:50,545 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 23:15:50,546 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 23:15:50,547 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 23:15:50,561 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 23:15:50,561 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 23:15:50,562 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-23 23:15:50,563 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-23 23:15:50,563 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-23 23:15:50,563 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-23 23:15:50,563 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-23 23:15:50,563 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-23 23:15:50,563 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-23 23:15:50,564 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-23 23:15:50,564 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-23 23:15:50,564 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-23 23:15:50,564 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-23 23:15:50,564 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-23 23:15:50,565 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-23 23:15:50,565 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 23:15:50,566 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 23:15:50,566 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 23:15:50,566 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 23:15:50,566 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 23:15:50,566 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 23:15:50,567 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 23:15:50,567 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 23:15:50,567 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 23:15:50,567 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 23:15:50,567 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 23:15:50,567 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 23:15:50,568 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 23:15:50,568 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 23:15:50,568 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 23:15:50,568 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 23:15:50,568 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 23:15:50,569 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 23:15:50,569 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-23 23:15:50,569 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 23:15:50,569 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 23:15:50,569 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 23:15:50,570 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-23 23:15:50,859 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 23:15:50,871 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 23:15:50,874 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 23:15:50,876 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 23:15:50,876 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 23:15:50,877 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_two_index_06.i [2019-11-23 23:15:50,960 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b66373699/771150d8ae3b44f1b6dff5d3a0f04cd6/FLAG472f40d7a [2019-11-23 23:15:51,408 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 23:15:51,409 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_two_index_06.i [2019-11-23 23:15:51,415 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b66373699/771150d8ae3b44f1b6dff5d3a0f04cd6/FLAG472f40d7a [2019-11-23 23:15:51,773 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b66373699/771150d8ae3b44f1b6dff5d3a0f04cd6 [2019-11-23 23:15:51,783 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 23:15:51,785 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 23:15:51,786 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 23:15:51,786 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 23:15:51,790 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 23:15:51,794 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 11:15:51" (1/1) ... [2019-11-23 23:15:51,798 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@20950098 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:15:51, skipping insertion in model container [2019-11-23 23:15:51,799 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 11:15:51" (1/1) ... [2019-11-23 23:15:51,806 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 23:15:51,825 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 23:15:52,016 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 23:15:52,021 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 23:15:52,041 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 23:15:52,061 INFO L208 MainTranslator]: Completed translation [2019-11-23 23:15:52,061 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:15:52 WrapperNode [2019-11-23 23:15:52,061 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 23:15:52,062 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 23:15:52,062 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 23:15:52,063 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 23:15:52,071 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:15:52" (1/1) ... [2019-11-23 23:15:52,157 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:15:52" (1/1) ... [2019-11-23 23:15:52,176 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 23:15:52,177 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 23:15:52,177 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 23:15:52,177 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 23:15:52,186 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:15:52" (1/1) ... [2019-11-23 23:15:52,187 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:15:52" (1/1) ... [2019-11-23 23:15:52,188 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:15:52" (1/1) ... [2019-11-23 23:15:52,189 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:15:52" (1/1) ... [2019-11-23 23:15:52,194 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:15:52" (1/1) ... [2019-11-23 23:15:52,202 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:15:52" (1/1) ... [2019-11-23 23:15:52,204 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:15:52" (1/1) ... [2019-11-23 23:15:52,205 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 23:15:52,206 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 23:15:52,206 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 23:15:52,206 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 23:15:52,207 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:15:52" (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 23:15:52,263 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 23:15:52,263 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 23:15:52,263 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 23:15:52,263 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 23:15:52,264 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 23:15:52,264 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 23:15:52,584 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 23:15:52,584 INFO L284 CfgBuilder]: Removed 9 assume(true) statements. [2019-11-23 23:15:52,585 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 11:15:52 BoogieIcfgContainer [2019-11-23 23:15:52,586 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 23:15:52,587 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 23:15:52,587 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 23:15:52,590 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 23:15:52,590 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 11:15:51" (1/3) ... [2019-11-23 23:15:52,591 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40184f72 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 11:15:52, skipping insertion in model container [2019-11-23 23:15:52,591 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:15:52" (2/3) ... [2019-11-23 23:15:52,591 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40184f72 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 11:15:52, skipping insertion in model container [2019-11-23 23:15:52,591 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 11:15:52" (3/3) ... [2019-11-23 23:15:52,593 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_two_index_06.i [2019-11-23 23:15:52,603 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 23:15:52,609 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 23:15:52,620 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 23:15:52,641 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 23:15:52,641 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 23:15:52,641 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 23:15:52,641 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 23:15:52,641 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 23:15:52,641 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 23:15:52,641 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 23:15:52,641 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 23:15:52,653 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states. [2019-11-23 23:15:52,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-11-23 23:15:52,659 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 23:15:52,659 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-11-23 23:15:52,660 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 23:15:52,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 23:15:52,665 INFO L82 PathProgramCache]: Analyzing trace with hash -1774611857, now seen corresponding path program 1 times [2019-11-23 23:15:52,673 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 23:15:52,674 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724589056] [2019-11-23 23:15:52,674 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 23:15:52,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:15:52,823 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 23:15:52,824 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724589056] [2019-11-23 23:15:52,824 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 23:15:52,825 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-23 23:15:52,825 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600310276] [2019-11-23 23:15:52,829 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 23:15:52,830 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 23:15:52,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 23:15:52,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 23:15:52,842 INFO L87 Difference]: Start difference. First operand 9 states. Second operand 3 states. [2019-11-23 23:15:52,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 23:15:52,899 INFO L93 Difference]: Finished difference Result 17 states and 23 transitions. [2019-11-23 23:15:52,900 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 23:15:52,901 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2019-11-23 23:15:52,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 23:15:52,910 INFO L225 Difference]: With dead ends: 17 [2019-11-23 23:15:52,910 INFO L226 Difference]: Without dead ends: 9 [2019-11-23 23:15:52,913 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 23:15:52,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2019-11-23 23:15:52,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2019-11-23 23:15:52,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2019-11-23 23:15:52,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 11 transitions. [2019-11-23 23:15:52,940 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 11 transitions. Word has length 6 [2019-11-23 23:15:52,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 23:15:52,941 INFO L462 AbstractCegarLoop]: Abstraction has 9 states and 11 transitions. [2019-11-23 23:15:52,941 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 23:15:52,941 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 11 transitions. [2019-11-23 23:15:52,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-11-23 23:15:52,942 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 23:15:52,942 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-11-23 23:15:52,942 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 23:15:52,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 23:15:52,943 INFO L82 PathProgramCache]: Analyzing trace with hash -610925648, now seen corresponding path program 1 times [2019-11-23 23:15:52,943 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 23:15:52,943 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123697869] [2019-11-23 23:15:52,944 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 23:15:52,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:15:53,007 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 23:15:53,008 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123697869] [2019-11-23 23:15:53,008 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938758400] [2019-11-23 23:15:53,009 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 23:15:53,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:15:53,066 INFO L255 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-23 23:15:53,072 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 23:15:53,097 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 23:15:53,097 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-23 23:15:53,121 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 23:15:53,122 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-23 23:15:53,122 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [3] total 5 [2019-11-23 23:15:53,123 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390702453] [2019-11-23 23:15:53,125 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 23:15:53,125 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 23:15:53,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 23:15:53,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 23:15:53,126 INFO L87 Difference]: Start difference. First operand 9 states and 11 transitions. Second operand 4 states. [2019-11-23 23:15:53,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 23:15:53,173 INFO L93 Difference]: Finished difference Result 24 states and 30 transitions. [2019-11-23 23:15:53,174 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 23:15:53,174 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2019-11-23 23:15:53,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 23:15:53,175 INFO L225 Difference]: With dead ends: 24 [2019-11-23 23:15:53,175 INFO L226 Difference]: Without dead ends: 18 [2019-11-23 23:15:53,176 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 23:15:53,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2019-11-23 23:15:53,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 12. [2019-11-23 23:15:53,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2019-11-23 23:15:53,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2019-11-23 23:15:53,181 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 7 [2019-11-23 23:15:53,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 23:15:53,182 INFO L462 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2019-11-23 23:15:53,182 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 23:15:53,182 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2019-11-23 23:15:53,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-23 23:15:53,183 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 23:15:53,183 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2019-11-23 23:15:53,384 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 23:15:53,385 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 23:15:53,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 23:15:53,386 INFO L82 PathProgramCache]: Analyzing trace with hash -1417050161, now seen corresponding path program 1 times [2019-11-23 23:15:53,386 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 23:15:53,387 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108091994] [2019-11-23 23:15:53,388 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 23:15:53,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:15:53,505 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-23 23:15:53,508 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108091994] [2019-11-23 23:15:53,508 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606264311] [2019-11-23 23:15:53,509 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 23:15:53,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:15:53,579 INFO L255 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 23:15:53,581 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 23:15:53,589 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-23 23:15:53,589 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-23 23:15:53,628 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-23 23:15:53,629 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1325779145] [2019-11-23 23:15:53,653 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2019-11-23 23:15:53,653 INFO L166 IcfgInterpreter]: Building call graph [2019-11-23 23:15:53,659 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-23 23:15:53,665 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-23 23:15:53,666 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-23 23:15:54,998 WARN L192 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 121 [2019-11-23 23:15:55,495 WARN L192 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 135 [2019-11-23 23:15:56,464 WARN L192 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2019-11-23 23:16:07,540 WARN L192 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 210 [2019-11-23 23:16:07,683 WARN L192 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 211 DAG size of output: 210 [2019-11-23 23:16:08,862 WARN L192 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 216 DAG size of output: 213 [2019-11-23 23:16:11,554 WARN L192 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 225 DAG size of output: 222 [2019-11-23 23:16:11,758 WARN L192 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 225 DAG size of output: 223 [2019-11-23 23:16:11,892 WARN L192 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 225 [2019-11-23 23:16:31,679 WARN L192 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 280 DAG size of output: 278 [2019-11-23 23:16:33,622 WARN L192 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 283 DAG size of output: 280 [2019-11-23 23:16:35,556 WARN L192 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 289 DAG size of output: 284 [2019-11-23 23:16:35,668 WARN L192 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 285 DAG size of output: 283 [2019-11-23 23:16:35,893 WARN L192 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 287 DAG size of output: 287 [2019-11-23 23:16:37,898 WARN L192 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 291 [2019-11-23 23:16:38,030 WARN L192 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 292 DAG size of output: 290 [2019-11-23 23:16:38,258 WARN L192 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 293 DAG size of output: 293 [2019-11-23 23:16:40,204 WARN L192 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 297 [2019-11-23 23:16:40,324 WARN L192 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 298 DAG size of output: 297 [2019-11-23 23:16:42,310 WARN L192 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 304 DAG size of output: 302 [2019-11-23 23:16:42,432 WARN L192 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 303 DAG size of output: 298 [2019-11-23 23:16:42,653 WARN L192 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 300 DAG size of output: 300 [2019-11-23 23:16:44,882 WARN L192 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 304 [2019-11-23 23:16:45,011 WARN L192 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 305 DAG size of output: 303 [2019-11-23 23:16:45,147 WARN L192 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 305 [2019-11-23 23:16:45,258 WARN L192 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 306 DAG size of output: 306 [2019-11-23 23:16:47,386 WARN L192 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 317 DAG size of output: 314 [2019-11-23 23:16:47,503 WARN L192 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 315 DAG size of output: 311 [2019-11-23 23:16:49,810 WARN L192 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 315 [2019-11-23 23:16:49,952 WARN L192 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 316 DAG size of output: 315 [2019-11-23 23:16:52,176 WARN L192 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 318 [2019-11-23 23:16:52,318 WARN L192 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 319 DAG size of output: 319 [2019-11-23 23:16:54,801 WARN L192 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 323 [2019-11-23 23:16:54,962 WARN L192 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 324 DAG size of output: 321 [2019-11-23 23:16:55,093 WARN L192 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 322 [2019-11-23 23:16:55,210 WARN L192 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 323 DAG size of output: 323 [2019-11-23 23:16:57,550 WARN L192 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 334 DAG size of output: 331 [2019-11-23 23:16:57,679 WARN L192 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 332 DAG size of output: 327 [2019-11-23 23:17:00,340 WARN L192 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 330 [2019-11-23 23:17:00,480 WARN L192 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 331 DAG size of output: 328 [2019-11-23 23:17:00,617 WARN L192 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 329 [2019-11-23 23:17:00,744 WARN L192 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 330 DAG size of output: 330 [2019-11-23 23:17:03,085 WARN L192 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 334 [2019-11-23 23:17:03,204 WARN L192 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 335 DAG size of output: 335 [2019-11-23 23:17:05,776 WARN L192 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 346 DAG size of output: 344 [2019-11-23 23:17:05,923 WARN L192 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 345 DAG size of output: 339 [2019-11-23 23:17:09,079 WARN L192 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 342 [2019-11-23 23:17:09,254 WARN L192 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 343 DAG size of output: 342 [2019-11-23 23:17:11,841 WARN L192 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 345 [2019-11-23 23:17:11,970 WARN L192 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 346 DAG size of output: 346 [2019-11-23 23:17:15,117 WARN L192 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 350 [2019-11-23 23:17:15,267 WARN L192 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 351 DAG size of output: 347 [2019-11-23 23:17:15,415 WARN L192 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 347 [2019-11-23 23:17:15,544 WARN L192 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 348 DAG size of output: 348 [2019-11-23 23:17:18,277 WARN L192 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 352 [2019-11-23 23:17:18,411 WARN L192 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 353 DAG size of output: 353 [2019-11-23 23:17:21,037 WARN L192 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 361 DAG size of output: 360 [2019-11-23 23:17:21,194 WARN L192 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 361 DAG size of output: 356 [2019-11-23 23:17:23,800 WARN L192 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 358 [2019-11-23 23:17:23,945 WARN L192 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 359 DAG size of output: 359