/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_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 23:01:39,459 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 23:01:39,462 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 23:01:39,481 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-23 23:01:39,539 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 23:01:39,540 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 23:01:39,541 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 23:01:39,541 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 23:01:39,555 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 23:01:39,556 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 23:01:39,556 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-23 23:01:39,557 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-23 23:01:39,557 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-23 23:01:39,557 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-23 23:01:39,557 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-23 23:01:39,557 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-23 23:01:39,558 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-23 23:01:39,558 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-23 23:01:39,558 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-23 23:01:39,558 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-23 23:01:39,558 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-23 23:01:39,559 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-23 23:01:39,559 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-23 23:01:39,559 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 23:01:39,560 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 23:01:39,560 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 23:01:39,560 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 23:01:39,560 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 23:01:39,560 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 23:01:39,561 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 23:01:39,561 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 23:01:39,561 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 23:01:39,561 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 23:01:39,561 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 23:01:39,562 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 23:01:39,562 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 23:01:39,562 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 23:01:39,562 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 23:01:39,562 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 23:01:39,563 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 23:01:39,563 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 23:01:39,563 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-23 23:01:39,563 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 23:01:39,563 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 23:01:39,564 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 23:01:39,564 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-23 23:01:39,839 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 23:01:39,853 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 23:01:39,856 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 23:01:39,858 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 23:01:39,858 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 23:01:39,859 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/sorting_selectionsort_ground-2.i [2019-11-23 23:01:39,936 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9a7965c0c/455501ed21364001a436ade61dd79f7f/FLAGe453108ff [2019-11-23 23:01:40,401 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 23:01:40,402 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/sorting_selectionsort_ground-2.i [2019-11-23 23:01:40,409 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9a7965c0c/455501ed21364001a436ade61dd79f7f/FLAGe453108ff [2019-11-23 23:01:40,795 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9a7965c0c/455501ed21364001a436ade61dd79f7f [2019-11-23 23:01:40,809 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 23:01:40,811 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 23:01:40,812 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 23:01:40,813 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 23:01:40,816 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 23:01:40,817 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 11:01:40" (1/1) ... [2019-11-23 23:01:40,820 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7ca1bc9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:01:40, skipping insertion in model container [2019-11-23 23:01:40,820 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 11:01:40" (1/1) ... [2019-11-23 23:01:40,829 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 23:01:40,852 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 23:01:41,058 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 23:01:41,062 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 23:01:41,087 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 23:01:41,185 INFO L208 MainTranslator]: Completed translation [2019-11-23 23:01:41,187 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:01:41 WrapperNode [2019-11-23 23:01:41,187 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 23:01:41,188 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 23:01:41,188 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 23:01:41,188 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 23:01:41,201 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:01:41" (1/1) ... [2019-11-23 23:01:41,208 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:01:41" (1/1) ... [2019-11-23 23:01:41,239 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 23:01:41,240 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 23:01:41,240 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 23:01:41,240 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 23:01:41,249 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:01:41" (1/1) ... [2019-11-23 23:01:41,249 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:01:41" (1/1) ... [2019-11-23 23:01:41,252 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:01:41" (1/1) ... [2019-11-23 23:01:41,252 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:01:41" (1/1) ... [2019-11-23 23:01:41,259 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:01:41" (1/1) ... [2019-11-23 23:01:41,265 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:01:41" (1/1) ... [2019-11-23 23:01:41,267 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:01:41" (1/1) ... [2019-11-23 23:01:41,269 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 23:01:41,270 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 23:01:41,270 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 23:01:41,270 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 23:01:41,271 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:01:41" (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 23:01:41,330 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 23:01:41,330 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 23:01:41,330 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 23:01:41,330 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 23:01:41,331 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 23:01:41,331 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 23:01:41,822 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 23:01:41,822 INFO L284 CfgBuilder]: Removed 18 assume(true) statements. [2019-11-23 23:01:41,823 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 11:01:41 BoogieIcfgContainer [2019-11-23 23:01:41,824 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 23:01:41,825 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 23:01:41,825 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 23:01:41,829 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 23:01:41,829 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 11:01:40" (1/3) ... [2019-11-23 23:01:41,830 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@370363ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 11:01:41, skipping insertion in model container [2019-11-23 23:01:41,830 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:01:41" (2/3) ... [2019-11-23 23:01:41,832 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@370363ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 11:01:41, skipping insertion in model container [2019-11-23 23:01:41,832 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 11:01:41" (3/3) ... [2019-11-23 23:01:41,835 INFO L109 eAbstractionObserver]: Analyzing ICFG sorting_selectionsort_ground-2.i [2019-11-23 23:01:41,845 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 23:01:41,862 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2019-11-23 23:01:41,874 INFO L249 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2019-11-23 23:01:41,903 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 23:01:41,903 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 23:01:41,903 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 23:01:41,904 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 23:01:41,905 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 23:01:41,905 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 23:01:41,905 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 23:01:41,905 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 23:01:41,924 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2019-11-23 23:01:41,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-11-23 23:01:41,934 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 23:01:41,935 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-11-23 23:01:41,936 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 23:01:41,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 23:01:41,943 INFO L82 PathProgramCache]: Analyzing trace with hash -1358173295, now seen corresponding path program 1 times [2019-11-23 23:01:41,954 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 23:01:41,954 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087265131] [2019-11-23 23:01:41,955 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 23:01:42,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:01:42,085 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 23:01:42,086 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087265131] [2019-11-23 23:01:42,087 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 23:01:42,087 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-23 23:01:42,088 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456161474] [2019-11-23 23:01:42,093 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 23:01:42,093 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 23:01:42,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 23:01:42,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 23:01:42,110 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 3 states. [2019-11-23 23:01:42,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 23:01:42,142 INFO L93 Difference]: Finished difference Result 43 states and 63 transitions. [2019-11-23 23:01:42,143 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 23:01:42,144 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2019-11-23 23:01:42,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 23:01:42,154 INFO L225 Difference]: With dead ends: 43 [2019-11-23 23:01:42,154 INFO L226 Difference]: Without dead ends: 22 [2019-11-23 23:01:42,158 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 23:01:42,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-11-23 23:01:42,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2019-11-23 23:01:42,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-11-23 23:01:42,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 29 transitions. [2019-11-23 23:01:42,191 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 29 transitions. Word has length 7 [2019-11-23 23:01:42,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 23:01:42,191 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 29 transitions. [2019-11-23 23:01:42,192 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 23:01:42,192 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 29 transitions. [2019-11-23 23:01:42,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-23 23:01:42,193 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 23:01:42,193 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 23:01:42,193 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 23:01:42,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 23:01:42,194 INFO L82 PathProgramCache]: Analyzing trace with hash -30753730, now seen corresponding path program 1 times [2019-11-23 23:01:42,194 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 23:01:42,194 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505021110] [2019-11-23 23:01:42,194 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 23:01:42,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:01:42,245 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 23:01:42,246 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505021110] [2019-11-23 23:01:42,246 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960097618] [2019-11-23 23:01:42,247 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 23:01:42,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:01:42,292 INFO L255 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-23 23:01:42,297 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 23:01:42,324 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 23:01:42,324 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-23 23:01:42,342 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 23:01:42,342 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-23 23:01:42,343 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [3] total 6 [2019-11-23 23:01:42,344 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916040114] [2019-11-23 23:01:42,345 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 23:01:42,345 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 23:01:42,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 23:01:42,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-23 23:01:42,346 INFO L87 Difference]: Start difference. First operand 22 states and 29 transitions. Second operand 4 states. [2019-11-23 23:01:42,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 23:01:42,416 INFO L93 Difference]: Finished difference Result 42 states and 56 transitions. [2019-11-23 23:01:42,416 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 23:01:42,417 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2019-11-23 23:01:42,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 23:01:42,418 INFO L225 Difference]: With dead ends: 42 [2019-11-23 23:01:42,418 INFO L226 Difference]: Without dead ends: 36 [2019-11-23 23:01:42,419 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-23 23:01:42,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-11-23 23:01:42,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 32. [2019-11-23 23:01:42,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-11-23 23:01:42,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 45 transitions. [2019-11-23 23:01:42,428 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 45 transitions. Word has length 8 [2019-11-23 23:01:42,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 23:01:42,428 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 45 transitions. [2019-11-23 23:01:42,428 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 23:01:42,429 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 45 transitions. [2019-11-23 23:01:42,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-23 23:01:42,429 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 23:01:42,429 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 23:01:42,641 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 23:01:42,641 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 23:01:42,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 23:01:42,643 INFO L82 PathProgramCache]: Analyzing trace with hash -560638830, now seen corresponding path program 1 times [2019-11-23 23:01:42,643 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 23:01:42,644 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585782991] [2019-11-23 23:01:42,644 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 23:01:42,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:01:42,698 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 23:01:42,698 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585782991] [2019-11-23 23:01:42,699 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225521303] [2019-11-23 23:01:42,699 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 23:01:42,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:01:42,740 INFO L255 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 23:01:42,741 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 23:01:42,744 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 23:01:42,745 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-23 23:01:42,768 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 23:01:42,768 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [872856479] [2019-11-23 23:01:42,801 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2019-11-23 23:01:42,802 INFO L166 IcfgInterpreter]: Building call graph [2019-11-23 23:01:42,809 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-23 23:01:42,816 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-23 23:01:42,816 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-23 23:01:52,931 WARN L192 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 196 [2019-11-23 23:02:20,705 WARN L192 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 279 DAG size of output: 277 [2019-11-23 23:02:20,928 WARN L192 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 278 DAG size of output: 276 [2019-11-23 23:02:24,898 WARN L192 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 288 [2019-11-23 23:02:25,054 WARN L192 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 289 DAG size of output: 288 [2019-11-23 23:02:26,911 WARN L192 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 291 [2019-11-23 23:02:27,023 WARN L192 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 292 DAG size of output: 288 [2019-11-23 23:02:35,498 WARN L192 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 308 DAG size of output: 305 [2019-11-23 23:02:39,792 WARN L192 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 311 DAG size of output: 311 [2019-11-23 23:02:46,619 WARN L192 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 330 DAG size of output: 324 [2019-11-23 23:02:49,210 WARN L192 SmtUtils]: Spent 234.00 ms on a formula simplification that was a NOOP. DAG size: 326 [2019-11-23 23:02:49,469 WARN L192 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 327 DAG size of output: 325 [2019-11-23 23:02:54,919 WARN L192 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 335 [2019-11-23 23:02:55,084 WARN L192 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 336 DAG size of output: 336 [2019-11-23 23:02:57,616 WARN L192 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 341 DAG size of output: 339 [2019-11-23 23:03:00,112 WARN L192 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 342 DAG size of output: 341 [2019-11-23 23:03:02,698 WARN L192 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 360 DAG size of output: 358 [2019-11-23 23:03:05,446 WARN L192 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 362 [2019-11-23 23:03:05,569 WARN L192 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 363 DAG size of output: 361 [2019-11-23 23:03:05,700 WARN L192 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 363 [2019-11-23 23:03:05,826 WARN L192 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 364 DAG size of output: 364 [2019-11-23 23:03:08,583 WARN L192 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 368 [2019-11-23 23:03:08,715 WARN L192 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 369 DAG size of output: 369 [2019-11-23 23:03:11,520 WARN L192 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 373 [2019-11-23 23:03:11,678 WARN L192 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 374 DAG size of output: 372