/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_09.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 23:16:08,371 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 23:16:08,373 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 23:16:08,385 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 23:16:08,385 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 23:16:08,387 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 23:16:08,388 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 23:16:08,390 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 23:16:08,391 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 23:16:08,392 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 23:16:08,393 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 23:16:08,394 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2019-11-23 23:16:08,418 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 23:16:08,418 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 23:16:08,419 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 23:16:08,420 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 23:16:08,436 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 23:16:08,436 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 23:16:08,437 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-23 23:16:08,437 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-23 23:16:08,437 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-23 23:16:08,437 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-23 23:16:08,438 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-23 23:16:08,438 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-23 23:16:08,438 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-23 23:16:08,438 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-23 23:16:08,438 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-23 23:16:08,439 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-23 23:16:08,439 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-23 23:16:08,439 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-23 23:16:08,439 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-23 23:16:08,440 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 23:16:08,440 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 23:16:08,440 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 23:16:08,441 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 23:16:08,441 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 23:16:08,441 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 23:16:08,441 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 23:16:08,441 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 23:16:08,442 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 23:16:08,442 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 23:16:08,442 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 23:16:08,442 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 23:16:08,442 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 23:16:08,443 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 23:16:08,443 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 23:16:08,443 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 23:16:08,443 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 23:16:08,443 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 23:16:08,444 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-23 23:16:08,444 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 23:16:08,444 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 23:16:08,444 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 23:16:08,445 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-23 23:16:08,757 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 23:16:08,770 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 23:16:08,773 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 23:16:08,775 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 23:16:08,775 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 23:16:08,776 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_two_index_09.i [2019-11-23 23:16:08,836 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/058d1e639/170c206debf64ea2bc5eba3a0f325de6/FLAG2af8dffa9 [2019-11-23 23:16:09,281 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 23:16:09,282 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_two_index_09.i [2019-11-23 23:16:09,288 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/058d1e639/170c206debf64ea2bc5eba3a0f325de6/FLAG2af8dffa9 [2019-11-23 23:16:09,665 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/058d1e639/170c206debf64ea2bc5eba3a0f325de6 [2019-11-23 23:16:09,674 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 23:16:09,675 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 23:16:09,677 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 23:16:09,677 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 23:16:09,682 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 23:16:09,683 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 11:16:09" (1/1) ... [2019-11-23 23:16:09,686 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6f0dfb5d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:16:09, skipping insertion in model container [2019-11-23 23:16:09,687 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 11:16:09" (1/1) ... [2019-11-23 23:16:09,695 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 23:16:09,721 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 23:16:09,978 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 23:16:09,983 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 23:16:10,010 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 23:16:10,034 INFO L208 MainTranslator]: Completed translation [2019-11-23 23:16:10,034 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:16:10 WrapperNode [2019-11-23 23:16:10,034 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 23:16:10,035 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 23:16:10,035 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 23:16:10,035 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 23:16:10,042 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:16:10" (1/1) ... [2019-11-23 23:16:10,127 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:16:10" (1/1) ... [2019-11-23 23:16:10,156 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 23:16:10,156 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 23:16:10,156 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 23:16:10,156 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 23:16:10,166 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:16:10" (1/1) ... [2019-11-23 23:16:10,166 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:16:10" (1/1) ... [2019-11-23 23:16:10,173 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:16:10" (1/1) ... [2019-11-23 23:16:10,174 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:16:10" (1/1) ... [2019-11-23 23:16:10,180 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:16:10" (1/1) ... [2019-11-23 23:16:10,184 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:16:10" (1/1) ... [2019-11-23 23:16:10,186 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:16:10" (1/1) ... [2019-11-23 23:16:10,188 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 23:16:10,188 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 23:16:10,188 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 23:16:10,189 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 23:16:10,190 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:16:10" (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 23:16:10,261 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 23:16:10,263 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 23:16:10,264 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 23:16:10,264 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 23:16:10,264 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 23:16:10,264 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 23:16:10,555 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 23:16:10,555 INFO L284 CfgBuilder]: Removed 9 assume(true) statements. [2019-11-23 23:16:10,556 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 11:16:10 BoogieIcfgContainer [2019-11-23 23:16:10,557 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 23:16:10,558 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 23:16:10,558 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 23:16:10,562 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 23:16:10,562 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 11:16:09" (1/3) ... [2019-11-23 23:16:10,563 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5401dd1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 11:16:10, skipping insertion in model container [2019-11-23 23:16:10,563 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:16:10" (2/3) ... [2019-11-23 23:16:10,564 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5401dd1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 11:16:10, skipping insertion in model container [2019-11-23 23:16:10,564 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 11:16:10" (3/3) ... [2019-11-23 23:16:10,566 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_two_index_09.i [2019-11-23 23:16:10,577 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 23:16:10,591 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 23:16:10,611 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 23:16:10,635 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 23:16:10,635 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 23:16:10,635 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 23:16:10,636 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 23:16:10,636 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 23:16:10,636 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 23:16:10,636 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 23:16:10,636 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 23:16:10,652 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states. [2019-11-23 23:16:10,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-11-23 23:16:10,658 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 23:16:10,659 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-11-23 23:16:10,660 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 23:16:10,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 23:16:10,666 INFO L82 PathProgramCache]: Analyzing trace with hash -1774611857, now seen corresponding path program 1 times [2019-11-23 23:16:10,676 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 23:16:10,677 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805550773] [2019-11-23 23:16:10,677 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 23:16:10,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:16:10,846 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 23:16:10,846 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805550773] [2019-11-23 23:16:10,847 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 23:16:10,848 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-23 23:16:10,849 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317699093] [2019-11-23 23:16:10,854 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 23:16:10,854 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 23:16:10,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 23:16:10,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 23:16:10,873 INFO L87 Difference]: Start difference. First operand 9 states. Second operand 3 states. [2019-11-23 23:16:10,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 23:16:10,918 INFO L93 Difference]: Finished difference Result 17 states and 23 transitions. [2019-11-23 23:16:10,919 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 23:16:10,920 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2019-11-23 23:16:10,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 23:16:10,932 INFO L225 Difference]: With dead ends: 17 [2019-11-23 23:16:10,932 INFO L226 Difference]: Without dead ends: 9 [2019-11-23 23:16:10,936 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 23:16:10,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2019-11-23 23:16:10,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2019-11-23 23:16:10,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2019-11-23 23:16:10,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 11 transitions. [2019-11-23 23:16:10,976 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 11 transitions. Word has length 6 [2019-11-23 23:16:10,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 23:16:10,976 INFO L462 AbstractCegarLoop]: Abstraction has 9 states and 11 transitions. [2019-11-23 23:16:10,976 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 23:16:10,977 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 11 transitions. [2019-11-23 23:16:10,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-11-23 23:16:10,977 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 23:16:10,978 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-11-23 23:16:10,978 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 23:16:10,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 23:16:10,979 INFO L82 PathProgramCache]: Analyzing trace with hash -610925648, now seen corresponding path program 1 times [2019-11-23 23:16:10,979 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 23:16:10,980 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597771599] [2019-11-23 23:16:10,980 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 23:16:11,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:16:11,059 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 23:16:11,060 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597771599] [2019-11-23 23:16:11,061 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004480005] [2019-11-23 23:16:11,061 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 23:16:11,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:16:11,134 INFO L255 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-23 23:16:11,141 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 23:16:11,157 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 23:16:11,158 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-23 23:16:11,178 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 23:16:11,179 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-23 23:16:11,179 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [3] total 5 [2019-11-23 23:16:11,180 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410361020] [2019-11-23 23:16:11,181 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 23:16:11,182 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 23:16:11,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 23:16:11,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 23:16:11,183 INFO L87 Difference]: Start difference. First operand 9 states and 11 transitions. Second operand 4 states. [2019-11-23 23:16:11,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 23:16:11,240 INFO L93 Difference]: Finished difference Result 24 states and 30 transitions. [2019-11-23 23:16:11,240 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 23:16:11,240 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2019-11-23 23:16:11,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 23:16:11,241 INFO L225 Difference]: With dead ends: 24 [2019-11-23 23:16:11,241 INFO L226 Difference]: Without dead ends: 18 [2019-11-23 23:16:11,243 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 23:16:11,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2019-11-23 23:16:11,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 12. [2019-11-23 23:16:11,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2019-11-23 23:16:11,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2019-11-23 23:16:11,247 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 7 [2019-11-23 23:16:11,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 23:16:11,248 INFO L462 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2019-11-23 23:16:11,248 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 23:16:11,248 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2019-11-23 23:16:11,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-23 23:16:11,249 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 23:16:11,249 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2019-11-23 23:16:11,450 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 23:16:11,450 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 23:16:11,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 23:16:11,451 INFO L82 PathProgramCache]: Analyzing trace with hash -1417050161, now seen corresponding path program 1 times [2019-11-23 23:16:11,451 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 23:16:11,452 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739211222] [2019-11-23 23:16:11,452 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 23:16:11,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:16:11,520 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 23:16:11,520 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739211222] [2019-11-23 23:16:11,521 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662020049] [2019-11-23 23:16:11,521 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 23:16:11,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:16:11,570 INFO L255 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 23:16:11,572 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 23:16:11,578 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 23:16:11,578 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-23 23:16:11,613 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 23:16:11,613 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1366104269] [2019-11-23 23:16:11,638 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2019-11-23 23:16:11,639 INFO L166 IcfgInterpreter]: Building call graph [2019-11-23 23:16:11,646 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-23 23:16:11,652 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-23 23:16:11,652 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-23 23:16:13,456 WARN L192 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 134 [2019-11-23 23:16:13,800 WARN L192 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 139 [2019-11-23 23:16:21,054 WARN L192 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 194 [2019-11-23 23:16:21,197 WARN L192 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 195 DAG size of output: 195 [2019-11-23 23:16:35,768 WARN L192 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 249 DAG size of output: 245 [2019-11-23 23:16:46,845 WARN L192 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 273 DAG size of output: 269 [2019-11-23 23:16:48,831 WARN L192 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 273 DAG size of output: 273 [2019-11-23 23:16:52,618 WARN L192 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 286 DAG size of output: 284 [2019-11-23 23:16:52,732 WARN L192 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 285 DAG size of output: 277 [2019-11-23 23:16:52,861 WARN L192 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2019-11-23 23:16:54,951 WARN L192 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 288 DAG size of output: 286 [2019-11-23 23:16:55,235 WARN L192 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 287 DAG size of output: 282 [2019-11-23 23:16:59,445 WARN L192 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 306 DAG size of output: 304 [2019-11-23 23:16:59,568 WARN L192 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 305 DAG size of output: 303 [2019-11-23 23:17:01,966 WARN L192 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 306 [2019-11-23 23:17:02,109 WARN L192 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 307 DAG size of output: 307 [2019-11-23 23:17:04,455 WARN L192 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 311 [2019-11-23 23:17:04,588 WARN L192 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 312 DAG size of output: 308 [2019-11-23 23:17:04,724 WARN L192 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 308 [2019-11-23 23:17:07,102 WARN L192 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 313 [2019-11-23 23:17:07,230 WARN L192 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 314 DAG size of output: 313 [2019-11-23 23:17:09,667 WARN L192 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 316 [2019-11-23 23:17:09,813 WARN L192 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 317 DAG size of output: 316 [2019-11-23 23:17:12,054 WARN L192 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 320 DAG size of output: 319 [2019-11-23 23:17:12,206 WARN L192 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 320 DAG size of output: 318 [2019-11-23 23:17:12,458 WARN L192 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 321 DAG size of output: 321 [2019-11-23 23:17:14,945 WARN L192 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 325 [2019-11-23 23:17:15,077 WARN L192 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 326 DAG size of output: 324 [2019-11-23 23:17:15,212 WARN L192 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 326 [2019-11-23 23:17:15,337 WARN L192 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 327 DAG size of output: 327 [2019-11-23 23:17:17,722 WARN L192 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 335 DAG size of output: 333 [2019-11-23 23:17:17,852 WARN L192 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 334 DAG size of output: 332 [2019-11-23 23:17:20,392 WARN L192 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 336 [2019-11-23 23:17:20,530 WARN L192 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 337 DAG size of output: 337 [2019-11-23 23:17:23,050 WARN L192 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 348 DAG size of output: 345 [2019-11-23 23:17:23,194 WARN L192 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 346 DAG size of output: 340 [2019-11-23 23:17:26,171 WARN L192 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 342 [2019-11-23 23:17:26,314 WARN L192 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 343 DAG size of output: 342 [2019-11-23 23:17:26,490 WARN L192 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 345 [2019-11-23 23:17:26,631 WARN L192 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 346 DAG size of output: 345 [2019-11-23 23:17:26,788 WARN L192 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 348 [2019-11-23 23:17:26,936 WARN L192 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 349 DAG size of output: 347 [2019-11-23 23:17:27,075 WARN L192 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 349 [2019-11-23 23:17:27,197 WARN L192 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 350 DAG size of output: 350 [2019-11-23 23:17:30,160 WARN L192 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 354 [2019-11-23 23:17:30,302 WARN L192 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 355 DAG size of output: 354 [2019-11-23 23:17:33,453 WARN L192 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 357 [2019-11-23 23:17:33,616 WARN L192 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 358 DAG size of output: 358 [2019-11-23 23:17:36,474 WARN L192 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 362 [2019-11-23 23:17:36,647 WARN L192 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 363 DAG size of output: 362 [2019-11-23 23:17:39,991 WARN L192 SmtUtils]: Spent 355.00 ms on a formula simplification that was a NOOP. DAG size: 365 [2019-11-23 23:17:40,301 WARN L192 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 366 DAG size of output: 366