/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_3-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-24 04:13:48,740 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-24 04:13:48,742 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-24 04:13:48,754 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-24 04:13:48,754 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-24 04:13:48,755 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-24 04:13:48,756 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-24 04:13:48,758 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-24 04:13:48,760 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-24 04:13:48,760 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-24 04:13:48,761 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-24 04:13:48,762 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-24 04:13:48,763 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-24 04:13:48,764 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-24 04:13:48,765 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-24 04:13:48,766 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-24 04:13:48,766 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-24 04:13:48,767 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-24 04:13:48,769 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-24 04:13:48,772 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-24 04:13:48,773 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-24 04:13:48,774 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-24 04:13:48,775 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-24 04:13:48,776 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-24 04:13:48,778 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-24 04:13:48,782 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-24 04:13:48,782 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-24 04:13:48,783 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-24 04:13:48,784 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-24 04:13:48,785 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-24 04:13:48,785 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-24 04:13:48,786 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-24 04:13:48,786 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-24 04:13:48,786 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-24 04:13:48,787 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-24 04:13:48,788 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-24 04:13:48,788 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 04:13:48,803 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-24 04:13:48,804 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-24 04:13:48,805 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-24 04:13:48,805 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-24 04:13:48,805 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-24 04:13:48,805 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-24 04:13:48,805 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-24 04:13:48,806 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-24 04:13:48,806 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-24 04:13:48,806 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-24 04:13:48,806 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-24 04:13:48,806 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-24 04:13:48,807 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-24 04:13:48,807 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-24 04:13:48,807 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-24 04:13:48,808 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-24 04:13:48,808 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-24 04:13:48,808 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-24 04:13:48,808 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-24 04:13:48,808 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-24 04:13:48,809 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-24 04:13:48,809 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-24 04:13:48,809 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-24 04:13:48,809 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-24 04:13:48,809 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-24 04:13:48,810 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-24 04:13:48,810 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-24 04:13:48,810 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-24 04:13:48,810 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-24 04:13:48,810 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-24 04:13:48,811 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-24 04:13:48,811 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-24 04:13:48,811 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-24 04:13:48,811 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-24 04:13:48,811 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-24 04:13:48,812 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-24 04:13:48,812 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-24 04:13:48,812 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-24 04:13:49,089 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-24 04:13:49,104 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-24 04:13:49,108 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-24 04:13:49,109 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-24 04:13:49,110 INFO L275 PluginConnector]: CDTParser initialized [2019-11-24 04:13:49,111 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/array_3-2.i [2019-11-24 04:13:49,182 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1867c741a/7f954642229c4ce0b441b55266579a9b/FLAG44647cabf [2019-11-24 04:13:49,624 INFO L306 CDTParser]: Found 1 translation units. [2019-11-24 04:13:49,625 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/array_3-2.i [2019-11-24 04:13:49,631 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1867c741a/7f954642229c4ce0b441b55266579a9b/FLAG44647cabf [2019-11-24 04:13:50,027 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1867c741a/7f954642229c4ce0b441b55266579a9b [2019-11-24 04:13:50,037 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-24 04:13:50,038 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-24 04:13:50,039 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-24 04:13:50,040 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-24 04:13:50,043 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-24 04:13:50,044 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 04:13:50" (1/1) ... [2019-11-24 04:13:50,047 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@75923a9d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:13:50, skipping insertion in model container [2019-11-24 04:13:50,047 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 04:13:50" (1/1) ... [2019-11-24 04:13:50,053 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-24 04:13:50,069 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-24 04:13:50,214 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 04:13:50,218 INFO L203 MainTranslator]: Completed pre-run [2019-11-24 04:13:50,238 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 04:13:50,256 INFO L208 MainTranslator]: Completed translation [2019-11-24 04:13:50,256 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:13:50 WrapperNode [2019-11-24 04:13:50,256 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-24 04:13:50,257 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-24 04:13:50,257 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-24 04:13:50,258 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-24 04:13:50,266 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:13:50" (1/1) ... [2019-11-24 04:13:50,351 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:13:50" (1/1) ... [2019-11-24 04:13:50,372 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-24 04:13:50,372 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-24 04:13:50,372 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-24 04:13:50,372 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-24 04:13:50,381 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:13:50" (1/1) ... [2019-11-24 04:13:50,382 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:13:50" (1/1) ... [2019-11-24 04:13:50,395 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:13:50" (1/1) ... [2019-11-24 04:13:50,396 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:13:50" (1/1) ... [2019-11-24 04:13:50,402 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:13:50" (1/1) ... [2019-11-24 04:13:50,409 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:13:50" (1/1) ... [2019-11-24 04:13:50,410 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:13:50" (1/1) ... [2019-11-24 04:13:50,412 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-24 04:13:50,412 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-24 04:13:50,412 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-24 04:13:50,413 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-24 04:13:50,413 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:13:50" (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 04:13:50,466 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-24 04:13:50,466 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-24 04:13:50,466 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-24 04:13:50,467 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-24 04:13:50,467 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-24 04:13:50,467 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-24 04:13:50,787 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-24 04:13:50,787 INFO L284 CfgBuilder]: Removed 8 assume(true) statements. [2019-11-24 04:13:50,788 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 04:13:50 BoogieIcfgContainer [2019-11-24 04:13:50,788 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-24 04:13:50,789 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-24 04:13:50,790 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-24 04:13:50,793 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-24 04:13:50,793 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 04:13:50" (1/3) ... [2019-11-24 04:13:50,794 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f54f531 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 04:13:50, skipping insertion in model container [2019-11-24 04:13:50,794 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:13:50" (2/3) ... [2019-11-24 04:13:50,794 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f54f531 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 04:13:50, skipping insertion in model container [2019-11-24 04:13:50,795 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 04:13:50" (3/3) ... [2019-11-24 04:13:50,798 INFO L109 eAbstractionObserver]: Analyzing ICFG array_3-2.i [2019-11-24 04:13:50,807 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-24 04:13:50,815 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-24 04:13:50,826 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-24 04:13:50,850 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-24 04:13:50,851 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-24 04:13:50,851 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-24 04:13:50,851 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-24 04:13:50,851 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-24 04:13:50,851 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-24 04:13:50,851 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-24 04:13:50,851 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-24 04:13:50,862 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states. [2019-11-24 04:13:50,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-11-24 04:13:50,868 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:13:50,869 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-11-24 04:13:50,869 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:13:50,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:13:50,874 INFO L82 PathProgramCache]: Analyzing trace with hash -1862256979, now seen corresponding path program 1 times [2019-11-24 04:13:50,882 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:13:50,883 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479370625] [2019-11-24 04:13:50,883 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:13:50,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:13:51,010 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 04:13:51,011 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479370625] [2019-11-24 04:13:51,011 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:13:51,012 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-24 04:13:51,012 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700331915] [2019-11-24 04:13:51,016 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 04:13:51,017 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:13:51,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 04:13:51,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 04:13:51,029 INFO L87 Difference]: Start difference. First operand 10 states. Second operand 3 states. [2019-11-24 04:13:51,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:13:51,104 INFO L93 Difference]: Finished difference Result 27 states and 35 transitions. [2019-11-24 04:13:51,104 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 04:13:51,106 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2019-11-24 04:13:51,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:13:51,116 INFO L225 Difference]: With dead ends: 27 [2019-11-24 04:13:51,116 INFO L226 Difference]: Without dead ends: 15 [2019-11-24 04:13:51,120 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 04:13:51,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2019-11-24 04:13:51,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 9. [2019-11-24 04:13:51,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2019-11-24 04:13:51,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2019-11-24 04:13:51,151 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 6 [2019-11-24 04:13:51,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:13:51,152 INFO L462 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2019-11-24 04:13:51,152 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 04:13:51,152 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2019-11-24 04:13:51,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-24 04:13:51,153 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:13:51,153 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:13:51,154 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:13:51,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:13:51,154 INFO L82 PathProgramCache]: Analyzing trace with hash 1077142315, now seen corresponding path program 1 times [2019-11-24 04:13:51,155 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:13:51,155 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120756311] [2019-11-24 04:13:51,155 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:13:51,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:13:51,222 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 04:13:51,222 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120756311] [2019-11-24 04:13:51,223 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:13:51,223 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-24 04:13:51,223 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639586254] [2019-11-24 04:13:51,225 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-24 04:13:51,225 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:13:51,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-24 04:13:51,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-24 04:13:51,226 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand 4 states. [2019-11-24 04:13:51,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:13:51,280 INFO L93 Difference]: Finished difference Result 15 states and 16 transitions. [2019-11-24 04:13:51,281 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-24 04:13:51,281 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2019-11-24 04:13:51,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:13:51,282 INFO L225 Difference]: With dead ends: 15 [2019-11-24 04:13:51,282 INFO L226 Difference]: Without dead ends: 11 [2019-11-24 04:13:51,283 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 04:13:51,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2019-11-24 04:13:51,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2019-11-24 04:13:51,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2019-11-24 04:13:51,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2019-11-24 04:13:51,287 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 8 [2019-11-24 04:13:51,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:13:51,288 INFO L462 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2019-11-24 04:13:51,288 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-24 04:13:51,288 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2019-11-24 04:13:51,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-24 04:13:51,289 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:13:51,289 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:13:51,289 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:13:51,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:13:51,290 INFO L82 PathProgramCache]: Analyzing trace with hash 752808720, now seen corresponding path program 1 times [2019-11-24 04:13:51,290 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:13:51,290 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938896341] [2019-11-24 04:13:51,291 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:13:51,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:13:51,379 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 04:13:51,380 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938896341] [2019-11-24 04:13:51,380 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517229334] [2019-11-24 04:13:51,380 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 04:13:51,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:13:51,441 INFO L255 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-24 04:13:51,446 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-24 04:13:51,483 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 04:13:51,484 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-24 04:13:51,515 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 04:13:51,516 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1048023446] [2019-11-24 04:13:51,540 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2019-11-24 04:13:51,541 INFO L166 IcfgInterpreter]: Building call graph [2019-11-24 04:13:51,548 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-24 04:13:51,554 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-24 04:13:51,555 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-24 04:14:04,422 WARN L192 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 195 DAG size of output: 193 [2019-11-24 04:14:27,377 WARN L192 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 261 [2019-11-24 04:14:27,541 WARN L192 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 262 DAG size of output: 261 [2019-11-24 04:14:36,561 WARN L192 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 298 DAG size of output: 298 [2019-11-24 04:14:53,671 WARN L192 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 333 [2019-11-24 04:14:53,950 WARN L192 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 334 DAG size of output: 333 [2019-11-24 04:14:56,278 WARN L192 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 340 DAG size of output: 338 [2019-11-24 04:14:56,391 WARN L192 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 339 DAG size of output: 332 [2019-11-24 04:14:59,274 WARN L192 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 345 DAG size of output: 343 [2019-11-24 04:14:59,388 WARN L192 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 344 DAG size of output: 340 [2019-11-24 04:15:01,906 WARN L192 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 345 DAG size of output: 344 [2019-11-24 04:15:04,339 WARN L192 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 347 [2019-11-24 04:15:04,447 WARN L192 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 348 DAG size of output: 348 [2019-11-24 04:15:06,843 WARN L192 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 352 [2019-11-24 04:15:06,957 WARN L192 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 353 DAG size of output: 352 [2019-11-24 04:15:09,382 WARN L192 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 357 DAG size of output: 356 [2019-11-24 04:15:09,503 WARN L192 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 357 DAG size of output: 353 [2019-11-24 04:15:09,727 WARN L192 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 355 DAG size of output: 355 [2019-11-24 04:15:12,175 WARN L192 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 359 [2019-11-24 04:15:12,295 WARN L192 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 360 DAG size of output: 358 [2019-11-24 04:15:12,424 WARN L192 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 360 [2019-11-24 04:15:12,535 WARN L192 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 361 DAG size of output: 360 [2019-11-24 04:15:12,776 WARN L192 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 364 DAG size of output: 364 [2019-11-24 04:15:15,365 WARN L192 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 368 [2019-11-24 04:15:15,488 WARN L192 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 369 DAG size of output: 366 [2019-11-24 04:15:15,631 WARN L192 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 367 [2019-11-24 04:15:15,736 WARN L192 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 368 DAG size of output: 368 [2019-11-24 04:15:18,541 WARN L192 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 372 [2019-11-24 04:15:18,737 WARN L192 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 373 DAG size of output: 372 [2019-11-24 04:15:21,560 WARN L192 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 379 DAG size of output: 377 [2019-11-24 04:15:21,705 WARN L192 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 378 DAG size of output: 375