/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-tiling/revcpyswp2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 23:27:28,622 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 23:27:28,624 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 23:27:28,642 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-23 23:27:28,666 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 23:27:28,668 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 23:27:28,670 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 23:27:28,672 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 23:27:28,673 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 23:27:28,674 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 23:27:28,675 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 23:27:28,680 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 23:27:28,684 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 23:27:28,688 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 23:27:28,689 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 23:27:28,690 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 23:27:28,692 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 23:27:28,702 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 23:27:28,702 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 23:27:28,704 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 23:27:28,705 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 23:27:28,731 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 23:27:28,732 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 23:27:28,732 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-23 23:27:28,733 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-23 23:27:28,733 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-23 23:27:28,733 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-23 23:27:28,733 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-23 23:27:28,734 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-23 23:27:28,734 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-23 23:27:28,734 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-23 23:27:28,734 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-23 23:27:28,734 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-23 23:27:28,735 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-23 23:27:28,735 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-23 23:27:28,735 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-23 23:27:28,736 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 23:27:28,736 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 23:27:28,736 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 23:27:28,736 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 23:27:28,737 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 23:27:28,737 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 23:27:28,737 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 23:27:28,737 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 23:27:28,737 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 23:27:28,738 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 23:27:28,738 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 23:27:28,738 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 23:27:28,738 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 23:27:28,738 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 23:27:28,739 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 23:27:28,739 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 23:27:28,739 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 23:27:28,739 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 23:27:28,739 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-23 23:27:28,740 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 23:27:28,740 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 23:27:28,740 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 23:27:28,740 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-23 23:27:29,072 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 23:27:29,090 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 23:27:29,093 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 23:27:29,096 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 23:27:29,096 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 23:27:29,097 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-tiling/revcpyswp2.c [2019-11-23 23:27:29,166 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b74852f9d/f228fcac32284917b67d4f07546d60f8/FLAG4b0ef937b [2019-11-23 23:27:29,622 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 23:27:29,623 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-tiling/revcpyswp2.c [2019-11-23 23:27:29,631 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b74852f9d/f228fcac32284917b67d4f07546d60f8/FLAG4b0ef937b [2019-11-23 23:27:29,977 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b74852f9d/f228fcac32284917b67d4f07546d60f8 [2019-11-23 23:27:29,988 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 23:27:29,989 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 23:27:29,990 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 23:27:29,991 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 23:27:29,994 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 23:27:29,995 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 11:27:29" (1/1) ... [2019-11-23 23:27:29,998 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@20d15c05 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:27:29, skipping insertion in model container [2019-11-23 23:27:29,998 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 11:27:29" (1/1) ... [2019-11-23 23:27:30,005 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 23:27:30,024 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 23:27:30,237 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 23:27:30,249 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 23:27:30,275 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 23:27:30,374 INFO L208 MainTranslator]: Completed translation [2019-11-23 23:27:30,374 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:27:30 WrapperNode [2019-11-23 23:27:30,374 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 23:27:30,375 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 23:27:30,375 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 23:27:30,376 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 23:27:30,384 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:27:30" (1/1) ... [2019-11-23 23:27:30,391 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:27:30" (1/1) ... [2019-11-23 23:27:30,417 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 23:27:30,417 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 23:27:30,417 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 23:27:30,418 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 23:27:30,425 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:27:30" (1/1) ... [2019-11-23 23:27:30,425 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:27:30" (1/1) ... [2019-11-23 23:27:30,428 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:27:30" (1/1) ... [2019-11-23 23:27:30,428 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:27:30" (1/1) ... [2019-11-23 23:27:30,436 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:27:30" (1/1) ... [2019-11-23 23:27:30,444 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:27:30" (1/1) ... [2019-11-23 23:27:30,446 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:27:30" (1/1) ... [2019-11-23 23:27:30,449 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 23:27:30,450 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 23:27:30,450 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 23:27:30,450 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 23:27:30,451 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:27:30" (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 23:27:30,501 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 23:27:30,501 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-23 23:27:30,501 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 23:27:30,501 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 23:27:30,502 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 23:27:30,961 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 23:27:30,961 INFO L284 CfgBuilder]: Removed 11 assume(true) statements. [2019-11-23 23:27:30,962 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 11:27:30 BoogieIcfgContainer [2019-11-23 23:27:30,962 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 23:27:30,963 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 23:27:30,964 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 23:27:30,967 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 23:27:30,967 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 11:27:29" (1/3) ... [2019-11-23 23:27:30,972 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24a2ac9a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 11:27:30, skipping insertion in model container [2019-11-23 23:27:30,972 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:27:30" (2/3) ... [2019-11-23 23:27:30,973 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24a2ac9a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 11:27:30, skipping insertion in model container [2019-11-23 23:27:30,973 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 11:27:30" (3/3) ... [2019-11-23 23:27:30,975 INFO L109 eAbstractionObserver]: Analyzing ICFG revcpyswp2.c [2019-11-23 23:27:30,988 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 23:27:30,994 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 23:27:31,004 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 23:27:31,024 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 23:27:31,025 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 23:27:31,025 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 23:27:31,025 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 23:27:31,025 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 23:27:31,025 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 23:27:31,025 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 23:27:31,025 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 23:27:31,038 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states. [2019-11-23 23:27:31,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-23 23:27:31,044 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 23:27:31,045 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 23:27:31,045 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 23:27:31,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 23:27:31,051 INFO L82 PathProgramCache]: Analyzing trace with hash -596952994, now seen corresponding path program 1 times [2019-11-23 23:27:31,059 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 23:27:31,060 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584124991] [2019-11-23 23:27:31,060 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 23:27:31,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:27:31,248 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 23:27:31,249 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584124991] [2019-11-23 23:27:31,249 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 23:27:31,250 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 23:27:31,251 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881532003] [2019-11-23 23:27:31,255 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 23:27:31,255 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 23:27:31,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 23:27:31,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 23:27:31,268 INFO L87 Difference]: Start difference. First operand 13 states. Second operand 3 states. [2019-11-23 23:27:31,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 23:27:31,330 INFO L93 Difference]: Finished difference Result 24 states and 35 transitions. [2019-11-23 23:27:31,331 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 23:27:31,332 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2019-11-23 23:27:31,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 23:27:31,343 INFO L225 Difference]: With dead ends: 24 [2019-11-23 23:27:31,343 INFO L226 Difference]: Without dead ends: 12 [2019-11-23 23:27:31,347 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 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 23:27:31,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2019-11-23 23:27:31,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2019-11-23 23:27:31,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2019-11-23 23:27:31,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 16 transitions. [2019-11-23 23:27:31,383 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 16 transitions. Word has length 9 [2019-11-23 23:27:31,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 23:27:31,383 INFO L462 AbstractCegarLoop]: Abstraction has 12 states and 16 transitions. [2019-11-23 23:27:31,384 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 23:27:31,384 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 16 transitions. [2019-11-23 23:27:31,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-23 23:27:31,385 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 23:27:31,385 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 23:27:31,385 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 23:27:31,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 23:27:31,386 INFO L82 PathProgramCache]: Analyzing trace with hash -1718561675, now seen corresponding path program 1 times [2019-11-23 23:27:31,386 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 23:27:31,386 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713700880] [2019-11-23 23:27:31,386 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 23:27:31,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:27:31,482 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 23:27:31,482 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713700880] [2019-11-23 23:27:31,482 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 23:27:31,483 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 23:27:31,483 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167731015] [2019-11-23 23:27:31,485 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 23:27:31,485 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 23:27:31,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 23:27:31,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 23:27:31,486 INFO L87 Difference]: Start difference. First operand 12 states and 16 transitions. Second operand 4 states. [2019-11-23 23:27:31,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 23:27:31,545 INFO L93 Difference]: Finished difference Result 27 states and 36 transitions. [2019-11-23 23:27:31,545 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 23:27:31,545 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2019-11-23 23:27:31,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 23:27:31,546 INFO L225 Difference]: With dead ends: 27 [2019-11-23 23:27:31,546 INFO L226 Difference]: Without dead ends: 20 [2019-11-23 23:27:31,548 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 23:27:31,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-11-23 23:27:31,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 15. [2019-11-23 23:27:31,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-11-23 23:27:31,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 19 transitions. [2019-11-23 23:27:31,553 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 19 transitions. Word has length 10 [2019-11-23 23:27:31,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 23:27:31,554 INFO L462 AbstractCegarLoop]: Abstraction has 15 states and 19 transitions. [2019-11-23 23:27:31,554 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 23:27:31,554 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 19 transitions. [2019-11-23 23:27:31,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-23 23:27:31,555 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 23:27:31,555 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 23:27:31,555 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 23:27:31,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 23:27:31,556 INFO L82 PathProgramCache]: Analyzing trace with hash -1623271333, now seen corresponding path program 1 times [2019-11-23 23:27:31,556 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 23:27:31,556 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280748923] [2019-11-23 23:27:31,557 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 23:27:31,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:27:31,638 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-23 23:27:31,639 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280748923] [2019-11-23 23:27:31,641 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300673250] [2019-11-23 23:27:31,641 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 23:27:31,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:27:31,713 INFO L255 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 23:27:31,719 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 23:27:31,780 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-23 23:27:31,780 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-23 23:27:31,814 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-23 23:27:31,814 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1830372183] [2019-11-23 23:27:31,842 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2019-11-23 23:27:31,842 INFO L166 IcfgInterpreter]: Building call graph [2019-11-23 23:27:31,856 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-23 23:27:31,866 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-23 23:27:31,875 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-23 23:27:32,301 WARN L192 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 41 [2019-11-23 23:27:32,903 WARN L192 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2019-11-23 23:27:33,082 WARN L192 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 161 [2019-11-23 23:27:33,604 WARN L192 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2019-11-23 23:27:33,781 WARN L192 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 182 [2019-11-23 23:27:33,977 WARN L192 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 182 [2019-11-23 23:27:34,633 WARN L192 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2019-11-23 23:27:34,810 WARN L192 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 208 DAG size of output: 203 [2019-11-23 23:27:35,001 WARN L192 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 203 [2019-11-23 23:27:36,155 WARN L192 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 218 [2019-11-23 23:27:36,363 WARN L192 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 229 DAG size of output: 222 [2019-11-23 23:27:36,574 WARN L192 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 222 DAG size of output: 222 [2019-11-23 23:27:36,840 WARN L192 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 232 [2019-11-23 23:27:37,056 WARN L192 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 233 DAG size of output: 232 [2019-11-23 23:27:37,334 WARN L192 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 236 [2019-11-23 23:27:37,495 WARN L192 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 237 DAG size of output: 237 [2019-11-23 23:27:39,931 WARN L192 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 255 [2019-11-23 23:27:40,097 WARN L192 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 241 [2019-11-23 23:27:40,272 WARN L192 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 242 DAG size of output: 240 [2019-11-23 23:27:40,483 WARN L192 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 242 [2019-11-23 23:27:40,618 WARN L192 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 243 DAG size of output: 242 [2019-11-23 23:27:40,802 WARN L192 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 245 [2019-11-23 23:27:40,938 WARN L192 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 246 DAG size of output: 246 [2019-11-23 23:27:44,411 WARN L192 SmtUtils]: Spent 416.00 ms on a formula simplification. DAG size of input: 267 DAG size of output: 266 [2019-11-23 23:27:44,562 WARN L192 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 250 [2019-11-23 23:27:44,779 WARN L192 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 251 DAG size of output: 251 [2019-11-23 23:27:48,125 WARN L192 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 270 DAG size of output: 269 [2019-11-23 23:27:48,364 WARN L192 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 255 [2019-11-23 23:27:48,547 WARN L192 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 256 DAG size of output: 255 [2019-11-23 23:27:51,517 WARN L192 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 272 DAG size of output: 271 [2019-11-23 23:27:51,669 WARN L192 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 258 [2019-11-23 23:27:51,801 WARN L192 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 259 DAG size of output: 259 [2019-11-23 23:27:54,925 WARN L192 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 277 DAG size of output: 276 [2019-11-23 23:27:55,069 WARN L192 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 263 [2019-11-23 23:27:55,202 WARN L192 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 264 DAG size of output: 264 [2019-11-23 23:27:58,164 WARN L192 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 277 DAG size of output: 276 [2019-11-23 23:27:58,339 WARN L192 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 268 [2019-11-23 23:27:58,511 WARN L192 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 269 DAG size of output: 265 [2019-11-23 23:28:01,518 WARN L192 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 281 DAG size of output: 280 [2019-11-23 23:28:01,729 WARN L192 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 265 [2019-11-23 23:28:01,881 WARN L192 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 266 DAG size of output: 264 [2019-11-23 23:28:02,041 WARN L192 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 266 [2019-11-23 23:28:02,166 WARN L192 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 267 DAG size of output: 267 [2019-11-23 23:28:05,729 WARN L192 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 288 [2019-11-23 23:28:05,884 WARN L192 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 271 [2019-11-23 23:28:06,023 WARN L192 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 272 DAG size of output: 271 [2019-11-23 23:28:09,650 WARN L192 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 290 DAG size of output: 289 [2019-11-23 23:28:09,804 WARN L192 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 274 [2019-11-23 23:28:09,953 WARN L192 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 275 DAG size of output: 274 [2019-11-23 23:28:13,612 WARN L192 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 295 DAG size of output: 294 [2019-11-23 23:28:13,760 WARN L192 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2019-11-23 23:28:13,900 WARN L192 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 278 DAG size of output: 278 [2019-11-23 23:28:17,441 WARN L192 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 297 DAG size of output: 296 [2019-11-23 23:28:17,607 WARN L192 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 282 [2019-11-23 23:28:17,773 WARN L192 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 283 DAG size of output: 283 [2019-11-23 23:28:21,458 WARN L192 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 299 DAG size of output: 298 [2019-11-23 23:28:21,629 WARN L192 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 287 [2019-11-23 23:28:21,803 WARN L192 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 288 DAG size of output: 286 [2019-11-23 23:28:25,574 WARN L192 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 302 DAG size of output: 301 [2019-11-23 23:28:25,726 WARN L192 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 288 [2019-11-23 23:28:25,916 WARN L192 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 289 DAG size of output: 285 [2019-11-23 23:28:26,086 WARN L192 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 285 [2019-11-23 23:28:26,246 WARN L192 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 286 DAG size of output: 286 [2019-11-23 23:28:30,275 WARN L192 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 311 DAG size of output: 310 [2019-11-23 23:28:30,451 WARN L192 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 290 [2019-11-23 23:28:30,611 WARN L192 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 291 DAG size of output: 291 [2019-11-23 23:28:34,820 WARN L192 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 313 DAG size of output: 312 [2019-11-23 23:28:35,004 WARN L192 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 295 [2019-11-23 23:28:35,170 WARN L192 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 296 DAG size of output: 295 [2019-11-23 23:28:39,381 WARN L192 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 318 DAG size of output: 317 [2019-11-23 23:28:39,550 WARN L192 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 298 [2019-11-23 23:28:39,707 WARN L192 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 299 DAG size of output: 299 [2019-11-23 23:28:44,109 WARN L192 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 318 DAG size of output: 317 [2019-11-23 23:28:44,280 WARN L192 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 303 [2019-11-23 23:28:44,429 WARN L192 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 304 DAG size of output: 304 [2019-11-23 23:28:49,000 WARN L192 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 322 DAG size of output: 321 [2019-11-23 23:28:49,181 WARN L192 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 308 [2019-11-23 23:28:49,339 WARN L192 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 309 DAG size of output: 308 [2019-11-23 23:28:53,983 WARN L192 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 325 DAG size of output: 324 [2019-11-23 23:28:54,169 WARN L192 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 311 [2019-11-23 23:28:54,335 WARN L192 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 312 DAG size of output: 311 [2019-11-23 23:28:59,069 WARN L192 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 327 DAG size of output: 326 [2019-11-23 23:28:59,267 WARN L192 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 314 [2019-11-23 23:28:59,431 WARN L192 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 315 DAG size of output: 315