/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -i ../../../trunk/examples/svcomp/loop-invgen/MADWiFi-encode_ie_ok.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-24 04:17:58,564 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-24 04:17:58,567 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-24 04:17:58,579 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-24 04:17:58,613 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2019-11-24 04:17:58,628 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-24 04:17:58,628 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-24 04:17:58,629 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-24 04:17:58,629 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-24 04:17:58,630 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-24 04:17:58,630 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-24 04:17:58,630 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-24 04:17:58,630 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-24 04:17:58,630 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-24 04:17:58,631 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-24 04:17:58,631 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-24 04:17:58,631 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-24 04:17:58,631 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-24 04:17:58,631 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-24 04:17:58,632 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-24 04:17:58,632 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-24 04:17:58,632 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-24 04:17:58,633 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-24 04:17:58,633 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-24 04:17:58,633 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-24 04:17:58,633 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-24 04:17:58,633 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-24 04:17:58,634 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-24 04:17:58,634 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-24 04:17:58,634 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-24 04:17:58,634 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-24 04:17:58,634 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-24 04:17:58,635 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-24 04:17:58,635 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-24 04:17:58,635 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-24 04:17:58,635 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-24 04:17:58,635 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-24 04:17:58,636 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-24 04:17:58,636 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-24 04:17:58,636 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-24 04:17:58,636 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-24 04:17:58,636 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-24 04:17:58,637 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-24 04:17:58,897 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-24 04:17:58,911 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-24 04:17:58,914 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-24 04:17:58,916 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-24 04:17:58,916 INFO L275 PluginConnector]: CDTParser initialized [2019-11-24 04:17:58,917 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/MADWiFi-encode_ie_ok.i [2019-11-24 04:17:58,989 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7d12a3f1d/d6792cfb7f8e415eac60f336e8c91fb8/FLAG415241c80 [2019-11-24 04:17:59,456 INFO L306 CDTParser]: Found 1 translation units. [2019-11-24 04:17:59,457 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/MADWiFi-encode_ie_ok.i [2019-11-24 04:17:59,462 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7d12a3f1d/d6792cfb7f8e415eac60f336e8c91fb8/FLAG415241c80 [2019-11-24 04:17:59,821 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7d12a3f1d/d6792cfb7f8e415eac60f336e8c91fb8 [2019-11-24 04:17:59,828 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-24 04:17:59,830 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-24 04:17:59,831 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-24 04:17:59,831 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-24 04:17:59,835 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-24 04:17:59,836 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 04:17:59" (1/1) ... [2019-11-24 04:17:59,838 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4cfdc51d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:17:59, skipping insertion in model container [2019-11-24 04:17:59,839 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 04:17:59" (1/1) ... [2019-11-24 04:17:59,846 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-24 04:17:59,861 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-24 04:18:00,030 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 04:18:00,034 INFO L203 MainTranslator]: Completed pre-run [2019-11-24 04:18:00,054 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 04:18:00,068 INFO L208 MainTranslator]: Completed translation [2019-11-24 04:18:00,068 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:18:00 WrapperNode [2019-11-24 04:18:00,068 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-24 04:18:00,069 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-24 04:18:00,069 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-24 04:18:00,069 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-24 04:18:00,078 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:18:00" (1/1) ... [2019-11-24 04:18:00,084 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:18:00" (1/1) ... [2019-11-24 04:18:00,183 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-24 04:18:00,184 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-24 04:18:00,184 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-24 04:18:00,184 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-24 04:18:00,193 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:18:00" (1/1) ... [2019-11-24 04:18:00,194 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:18:00" (1/1) ... [2019-11-24 04:18:00,194 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:18:00" (1/1) ... [2019-11-24 04:18:00,195 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:18:00" (1/1) ... [2019-11-24 04:18:00,197 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:18:00" (1/1) ... [2019-11-24 04:18:00,203 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:18:00" (1/1) ... [2019-11-24 04:18:00,204 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:18:00" (1/1) ... [2019-11-24 04:18:00,205 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-24 04:18:00,206 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-24 04:18:00,206 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-24 04:18:00,206 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-24 04:18:00,207 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:18:00" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-24 04:18:00,264 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-24 04:18:00,264 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-24 04:18:00,501 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-24 04:18:00,502 INFO L284 CfgBuilder]: Removed 9 assume(true) statements. [2019-11-24 04:18:00,503 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 04:18:00 BoogieIcfgContainer [2019-11-24 04:18:00,503 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-24 04:18:00,505 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-24 04:18:00,505 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-24 04:18:00,519 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-24 04:18:00,522 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 04:17:59" (1/3) ... [2019-11-24 04:18:00,523 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8a0fc2a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 04:18:00, skipping insertion in model container [2019-11-24 04:18:00,524 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:18:00" (2/3) ... [2019-11-24 04:18:00,524 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8a0fc2a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 04:18:00, skipping insertion in model container [2019-11-24 04:18:00,525 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 04:18:00" (3/3) ... [2019-11-24 04:18:00,530 INFO L109 eAbstractionObserver]: Analyzing ICFG MADWiFi-encode_ie_ok.i [2019-11-24 04:18:00,554 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-24 04:18:00,571 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2019-11-24 04:18:00,597 INFO L249 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2019-11-24 04:18:00,622 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-24 04:18:00,622 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-24 04:18:00,622 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-24 04:18:00,622 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-24 04:18:00,622 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-24 04:18:00,622 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-24 04:18:00,622 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-24 04:18:00,623 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-24 04:18:00,634 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2019-11-24 04:18:00,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-24 04:18:00,640 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:18:00,641 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:18:00,641 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:18:00,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:18:00,647 INFO L82 PathProgramCache]: Analyzing trace with hash 1314021635, now seen corresponding path program 1 times [2019-11-24 04:18:00,656 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:18:00,657 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408604084] [2019-11-24 04:18:00,657 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:18:00,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:18:00,839 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:18:00,840 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408604084] [2019-11-24 04:18:00,840 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:18:00,840 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-24 04:18:00,842 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931564255] [2019-11-24 04:18:00,846 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-24 04:18:00,846 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:18:00,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-24 04:18:00,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-24 04:18:00,859 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2019-11-24 04:18:00,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:18:00,970 INFO L93 Difference]: Finished difference Result 36 states and 46 transitions. [2019-11-24 04:18:00,971 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-24 04:18:00,973 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2019-11-24 04:18:00,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:18:00,983 INFO L225 Difference]: With dead ends: 36 [2019-11-24 04:18:00,983 INFO L226 Difference]: Without dead ends: 17 [2019-11-24 04:18:00,987 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-24 04:18:01,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-11-24 04:18:01,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2019-11-24 04:18:01,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-11-24 04:18:01,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2019-11-24 04:18:01,023 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 12 [2019-11-24 04:18:01,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:18:01,024 INFO L462 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2019-11-24 04:18:01,024 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-24 04:18:01,024 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2019-11-24 04:18:01,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-24 04:18:01,025 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:18:01,025 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:18:01,026 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:18:01,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:18:01,026 INFO L82 PathProgramCache]: Analyzing trace with hash 54563046, now seen corresponding path program 1 times [2019-11-24 04:18:01,027 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:18:01,027 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902272331] [2019-11-24 04:18:01,027 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:18:01,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:18:01,122 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:18:01,124 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902272331] [2019-11-24 04:18:01,124 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:18:01,125 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-24 04:18:01,125 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322715193] [2019-11-24 04:18:01,127 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-24 04:18:01,127 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:18:01,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-24 04:18:01,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-24 04:18:01,131 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 5 states. [2019-11-24 04:18:01,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:18:01,206 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2019-11-24 04:18:01,208 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-24 04:18:01,208 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2019-11-24 04:18:01,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:18:01,209 INFO L225 Difference]: With dead ends: 23 [2019-11-24 04:18:01,210 INFO L226 Difference]: Without dead ends: 21 [2019-11-24 04:18:01,211 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-24 04:18:01,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-11-24 04:18:01,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2019-11-24 04:18:01,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-11-24 04:18:01,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2019-11-24 04:18:01,217 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 14 [2019-11-24 04:18:01,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:18:01,218 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2019-11-24 04:18:01,218 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-24 04:18:01,218 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2019-11-24 04:18:01,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-24 04:18:01,219 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:18:01,219 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:18:01,220 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:18:01,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:18:01,220 INFO L82 PathProgramCache]: Analyzing trace with hash 1785729290, now seen corresponding path program 1 times [2019-11-24 04:18:01,221 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:18:01,221 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315681544] [2019-11-24 04:18:01,221 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:18:01,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:18:01,322 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-24 04:18:01,323 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315681544] [2019-11-24 04:18:01,323 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868111141] [2019-11-24 04:18:01,323 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-24 04:18:01,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:18:01,366 INFO L255 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-24 04:18:01,372 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-24 04:18:01,460 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 04:18:01,482 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:18:01,483 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-24 04:18:01,573 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:18:01,574 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1892906530] [2019-11-24 04:18:01,600 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2019-11-24 04:18:01,601 INFO L166 IcfgInterpreter]: Building call graph [2019-11-24 04:18:01,607 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-24 04:18:01,614 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-24 04:18:01,615 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-24 04:18:02,569 WARN L192 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 174 DAG size of output: 173 [2019-11-24 04:18:02,777 WARN L192 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 174 DAG size of output: 166 [2019-11-24 04:18:02,949 WARN L192 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 210 DAG size of output: 208 [2019-11-24 04:18:03,162 WARN L192 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 199 [2019-11-24 04:18:03,398 WARN L192 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 257 DAG size of output: 253 [2019-11-24 04:18:03,677 WARN L192 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 253 DAG size of output: 242 [2019-11-24 04:18:03,997 WARN L192 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 313 DAG size of output: 305 [2019-11-24 04:18:04,343 WARN L192 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 305 DAG size of output: 294 [2019-11-24 04:18:04,777 WARN L192 SmtUtils]: Spent 385.00 ms on a formula simplification. DAG size of input: 384 DAG size of output: 384 [2019-11-24 04:18:05,317 WARN L192 SmtUtils]: Spent 405.00 ms on a formula simplification. DAG size of input: 385 DAG size of output: 361 [2019-11-24 04:18:05,719 WARN L192 SmtUtils]: Spent 300.00 ms on a formula simplification that was a NOOP. DAG size: 359 [2019-11-24 04:18:06,045 WARN L192 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 360 DAG size of output: 355 [2019-11-24 04:18:06,578 WARN L192 SmtUtils]: Spent 483.00 ms on a formula simplification. DAG size of input: 462 DAG size of output: 453 [2019-11-24 04:18:07,620 WARN L192 SmtUtils]: Spent 926.00 ms on a formula simplification. DAG size of input: 454 DAG size of output: 449 [2019-11-24 04:18:08,608 WARN L192 SmtUtils]: Spent 911.00 ms on a formula simplification. DAG size of input: 575 DAG size of output: 570 [2019-11-24 04:18:09,660 WARN L192 SmtUtils]: Spent 855.00 ms on a formula simplification. DAG size of input: 570 DAG size of output: 564 [2019-11-24 04:18:10,868 WARN L192 SmtUtils]: Spent 1.11 s on a formula simplification. DAG size of input: 732 DAG size of output: 704 [2019-11-24 04:18:12,224 WARN L192 SmtUtils]: Spent 1.08 s on a formula simplification. DAG size of input: 698 DAG size of output: 691 [2019-11-24 04:18:14,228 WARN L192 SmtUtils]: Spent 1.88 s on a formula simplification. DAG size of input: 901 DAG size of output: 875 [2019-11-24 04:18:16,612 WARN L192 SmtUtils]: Spent 1.88 s on a formula simplification. DAG size of input: 866 DAG size of output: 852 [2019-11-24 04:18:19,965 WARN L192 SmtUtils]: Spent 3.18 s on a formula simplification. DAG size of input: 1132 DAG size of output: 1108 [2019-11-24 04:18:23,360 WARN L192 SmtUtils]: Spent 2.93 s on a formula simplification. DAG size of input: 1100 DAG size of output: 1093 [2019-11-24 04:18:28,136 WARN L192 SmtUtils]: Spent 4.55 s on a formula simplification. DAG size of input: 1402 DAG size of output: 1393 [2019-11-24 04:18:33,634 WARN L192 SmtUtils]: Spent 4.66 s on a formula simplification. DAG size of input: 1388 DAG size of output: 1378 [2019-11-24 04:18:35,044 WARN L229 IntervalDomain]: Interval conversion did not stabilize in 9 iterations. Over-approximation may be very coarse. [2019-11-24 04:18:39,760 WARN L192 SmtUtils]: Spent 4.56 s on a formula simplification that was a NOOP. DAG size: 1383 [2019-11-24 04:18:44,850 WARN L192 SmtUtils]: Spent 4.62 s on a formula simplification. DAG size of input: 1384 DAG size of output: 1379 [2019-11-24 04:18:52,905 WARN L192 SmtUtils]: Spent 7.81 s on a formula simplification. DAG size of input: 1808 DAG size of output: 1792 [2019-11-24 04:19:02,250 WARN L192 SmtUtils]: Spent 8.21 s on a formula simplification. DAG size of input: 1791 DAG size of output: 1778 [2019-11-24 04:19:11,651 WARN L192 SmtUtils]: Spent 8.08 s on a formula simplification that was a NOOP. DAG size: 1782 [2019-11-24 04:19:20,057 WARN L192 SmtUtils]: Spent 8.40 s on a formula simplification. DAG size of input: 1783 DAG size of output: 1777 [2019-11-24 04:19:29,222 WARN L192 SmtUtils]: Spent 7.84 s on a formula simplification that was a NOOP. DAG size: 1784 [2019-11-24 04:19:37,282 WARN L192 SmtUtils]: Spent 8.05 s on a formula simplification. DAG size of input: 1785 DAG size of output: 1780