/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/sorting_selectionsort_2_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 23:01:24,788 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 23:01:24,790 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 23:01:24,807 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-23 23:01:24,861 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 23:01:24,890 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 23:01:24,890 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 23:01:24,891 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-23 23:01:24,891 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-23 23:01:24,891 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-23 23:01:24,893 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-23 23:01:24,893 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-23 23:01:24,893 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-23 23:01:24,893 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-23 23:01:24,893 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-23 23:01:24,894 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-23 23:01:24,894 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-23 23:01:24,894 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-23 23:01:24,894 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-23 23:01:24,894 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-23 23:01:24,896 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 23:01:24,896 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 23:01:24,896 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 23:01:24,897 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 23:01:24,897 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 23:01:24,897 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 23:01:24,897 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 23:01:24,898 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 23:01:24,898 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 23:01:24,898 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 23:01:24,898 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 23:01:24,898 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 23:01:24,899 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 23:01:24,899 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 23:01:24,899 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 23:01:24,899 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 23:01:24,899 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 23:01:24,900 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 23:01:24,901 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-23 23:01:24,901 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 23:01:24,901 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 23:01:24,902 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 23:01:24,902 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-23 23:01:25,180 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 23:01:25,195 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 23:01:25,199 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 23:01:25,201 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 23:01:25,201 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 23:01:25,202 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/sorting_selectionsort_2_ground.i [2019-11-23 23:01:25,276 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/321971aff/87afcb68290c44549ed6cad8f1eb536a/FLAG960b8379e [2019-11-23 23:01:25,700 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 23:01:25,701 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/sorting_selectionsort_2_ground.i [2019-11-23 23:01:25,711 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/321971aff/87afcb68290c44549ed6cad8f1eb536a/FLAG960b8379e [2019-11-23 23:01:26,101 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/321971aff/87afcb68290c44549ed6cad8f1eb536a [2019-11-23 23:01:26,112 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 23:01:26,113 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 23:01:26,114 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 23:01:26,115 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 23:01:26,118 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 23:01:26,119 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 11:01:26" (1/1) ... [2019-11-23 23:01:26,122 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2204a74f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:01:26, skipping insertion in model container [2019-11-23 23:01:26,122 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 11:01:26" (1/1) ... [2019-11-23 23:01:26,130 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 23:01:26,154 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 23:01:26,360 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 23:01:26,364 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 23:01:26,390 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 23:01:26,500 INFO L208 MainTranslator]: Completed translation [2019-11-23 23:01:26,501 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:01:26 WrapperNode [2019-11-23 23:01:26,501 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 23:01:26,502 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 23:01:26,502 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 23:01:26,502 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 23:01:26,510 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:01:26" (1/1) ... [2019-11-23 23:01:26,518 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:01:26" (1/1) ... [2019-11-23 23:01:26,544 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 23:01:26,544 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 23:01:26,544 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 23:01:26,545 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 23:01:26,554 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:01:26" (1/1) ... [2019-11-23 23:01:26,555 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:01:26" (1/1) ... [2019-11-23 23:01:26,559 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:01:26" (1/1) ... [2019-11-23 23:01:26,560 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:01:26" (1/1) ... [2019-11-23 23:01:26,581 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:01:26" (1/1) ... [2019-11-23 23:01:26,587 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:01:26" (1/1) ... [2019-11-23 23:01:26,589 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:01:26" (1/1) ... [2019-11-23 23:01:26,592 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 23:01:26,592 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 23:01:26,592 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 23:01:26,592 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 23:01:26,593 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:01:26" (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 23:01:26,645 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 23:01:26,647 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 23:01:26,648 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 23:01:26,648 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 23:01:26,648 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 23:01:26,648 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 23:01:27,157 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 23:01:27,157 INFO L284 CfgBuilder]: Removed 18 assume(true) statements. [2019-11-23 23:01:27,158 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 11:01:27 BoogieIcfgContainer [2019-11-23 23:01:27,159 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 23:01:27,160 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 23:01:27,160 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 23:01:27,163 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 23:01:27,163 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 11:01:26" (1/3) ... [2019-11-23 23:01:27,164 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11718d39 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 11:01:27, skipping insertion in model container [2019-11-23 23:01:27,164 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:01:26" (2/3) ... [2019-11-23 23:01:27,165 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11718d39 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 11:01:27, skipping insertion in model container [2019-11-23 23:01:27,165 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 11:01:27" (3/3) ... [2019-11-23 23:01:27,167 INFO L109 eAbstractionObserver]: Analyzing ICFG sorting_selectionsort_2_ground.i [2019-11-23 23:01:27,177 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 23:01:27,184 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2019-11-23 23:01:27,193 INFO L249 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2019-11-23 23:01:27,214 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 23:01:27,214 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 23:01:27,214 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 23:01:27,215 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 23:01:27,215 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 23:01:27,215 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 23:01:27,215 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 23:01:27,215 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 23:01:27,229 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2019-11-23 23:01:27,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-11-23 23:01:27,234 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 23:01:27,235 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-11-23 23:01:27,236 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 23:01:27,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 23:01:27,242 INFO L82 PathProgramCache]: Analyzing trace with hash -1472689899, now seen corresponding path program 1 times [2019-11-23 23:01:27,250 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 23:01:27,250 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890606488] [2019-11-23 23:01:27,250 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 23:01:27,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:01:27,381 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 23:01:27,383 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890606488] [2019-11-23 23:01:27,384 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 23:01:27,384 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-23 23:01:27,385 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513408728] [2019-11-23 23:01:27,390 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 23:01:27,390 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 23:01:27,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 23:01:27,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 23:01:27,403 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 3 states. [2019-11-23 23:01:27,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 23:01:27,484 INFO L93 Difference]: Finished difference Result 56 states and 83 transitions. [2019-11-23 23:01:27,484 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 23:01:27,486 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2019-11-23 23:01:27,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 23:01:27,496 INFO L225 Difference]: With dead ends: 56 [2019-11-23 23:01:27,496 INFO L226 Difference]: Without dead ends: 35 [2019-11-23 23:01:27,500 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 23:01:27,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-11-23 23:01:27,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 23. [2019-11-23 23:01:27,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-11-23 23:01:27,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 30 transitions. [2019-11-23 23:01:27,539 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 30 transitions. Word has length 7 [2019-11-23 23:01:27,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 23:01:27,539 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 30 transitions. [2019-11-23 23:01:27,540 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 23:01:27,540 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 30 transitions. [2019-11-23 23:01:27,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-23 23:01:27,540 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 23:01:27,541 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 23:01:27,541 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 23:01:27,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 23:01:27,542 INFO L82 PathProgramCache]: Analyzing trace with hash -747302925, now seen corresponding path program 1 times [2019-11-23 23:01:27,542 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 23:01:27,542 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014894176] [2019-11-23 23:01:27,542 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 23:01:27,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:01:27,588 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 23:01:27,589 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014894176] [2019-11-23 23:01:27,589 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491392633] [2019-11-23 23:01:27,589 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 23:01:27,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:01:27,658 INFO L255 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 23:01:27,665 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 23:01:27,692 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 23:01:27,692 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-23 23:01:27,721 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 23:01:27,722 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1189373006] [2019-11-23 23:01:27,752 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2019-11-23 23:01:27,752 INFO L166 IcfgInterpreter]: Building call graph [2019-11-23 23:01:27,759 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-23 23:01:27,765 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-23 23:01:27,766 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-23 23:01:58,080 WARN L192 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 251 [2019-11-23 23:02:20,002 WARN L192 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 302 [2019-11-23 23:02:20,165 WARN L192 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 303 DAG size of output: 303 [2019-11-23 23:02:22,249 WARN L192 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 312 DAG size of output: 306 [2019-11-23 23:02:26,810 WARN L192 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 323 DAG size of output: 320 [2019-11-23 23:02:29,388 WARN L192 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 327 DAG size of output: 324 [2019-11-23 23:02:29,564 WARN L192 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 325 DAG size of output: 323 [2019-11-23 23:02:31,958 WARN L192 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 328 DAG size of output: 326 [2019-11-23 23:02:36,782 WARN L192 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 335 DAG size of output: 334 [2019-11-23 23:02:44,931 WARN L192 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 355 DAG size of output: 349 [2019-11-23 23:02:47,653 WARN L192 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 353 DAG size of output: 352 [2019-11-23 23:02:50,308 WARN L192 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 360 DAG size of output: 356 [2019-11-23 23:02:53,126 WARN L192 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 361 DAG size of output: 359 [2019-11-23 23:02:55,999 WARN L192 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 362 DAG size of output: 362 [2019-11-23 23:02:58,637 WARN L192 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 371 DAG size of output: 369 [2019-11-23 23:02:58,765 WARN L192 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 370 DAG size of output: 364