/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/nr5.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 23:25:37,095 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 23:25:37,098 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 23:25:37,118 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-23 23:25:37,144 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 23:25:37,146 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 23:25:37,149 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 23:25:37,150 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 23:25:37,152 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 23:25:37,153 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 23:25:37,154 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 23:25:37,158 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 23:25:37,163 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 23:25:37,167 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 23:25:37,168 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 23:25:37,169 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 23:25:37,171 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 23:25:37,181 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 23:25:37,182 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 23:25:37,183 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 23:25:37,184 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 23:25:37,219 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 23:25:37,219 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 23:25:37,220 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-23 23:25:37,223 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-23 23:25:37,223 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-23 23:25:37,223 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-23 23:25:37,224 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-23 23:25:37,224 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-23 23:25:37,224 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-23 23:25:37,224 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-23 23:25:37,224 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-23 23:25:37,224 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-23 23:25:37,225 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-23 23:25:37,225 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-23 23:25:37,225 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-23 23:25:37,228 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 23:25:37,229 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 23:25:37,229 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 23:25:37,229 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 23:25:37,229 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 23:25:37,229 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 23:25:37,229 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 23:25:37,230 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 23:25:37,230 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 23:25:37,230 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 23:25:37,230 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 23:25:37,230 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 23:25:37,231 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 23:25:37,231 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 23:25:37,231 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 23:25:37,232 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 23:25:37,232 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 23:25:37,232 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 23:25:37,232 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-23 23:25:37,232 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 23:25:37,232 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 23:25:37,233 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 23:25:37,233 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-23 23:25:37,516 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 23:25:37,528 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 23:25:37,532 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 23:25:37,534 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 23:25:37,535 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 23:25:37,535 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-tiling/nr5.c [2019-11-23 23:25:37,608 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2ef2d5f55/84950d364dce4fa395286dde2798f27c/FLAG13c5b4ccc [2019-11-23 23:25:38,057 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 23:25:38,058 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-tiling/nr5.c [2019-11-23 23:25:38,064 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2ef2d5f55/84950d364dce4fa395286dde2798f27c/FLAG13c5b4ccc [2019-11-23 23:25:38,452 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2ef2d5f55/84950d364dce4fa395286dde2798f27c [2019-11-23 23:25:38,460 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 23:25:38,461 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 23:25:38,462 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 23:25:38,462 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 23:25:38,469 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 23:25:38,470 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 11:25:38" (1/1) ... [2019-11-23 23:25:38,472 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@56069b0d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:25:38, skipping insertion in model container [2019-11-23 23:25:38,472 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 11:25:38" (1/1) ... [2019-11-23 23:25:38,480 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 23:25:38,502 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 23:25:38,720 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 23:25:38,727 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 23:25:38,768 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 23:25:38,791 INFO L208 MainTranslator]: Completed translation [2019-11-23 23:25:38,791 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:25:38 WrapperNode [2019-11-23 23:25:38,791 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 23:25:38,792 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 23:25:38,793 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 23:25:38,793 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 23:25:38,890 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:25:38" (1/1) ... [2019-11-23 23:25:38,900 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:25:38" (1/1) ... [2019-11-23 23:25:38,930 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 23:25:38,931 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 23:25:38,931 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 23:25:38,931 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 23:25:38,941 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:25:38" (1/1) ... [2019-11-23 23:25:38,942 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:25:38" (1/1) ... [2019-11-23 23:25:38,954 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:25:38" (1/1) ... [2019-11-23 23:25:38,954 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:25:38" (1/1) ... [2019-11-23 23:25:38,960 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:25:38" (1/1) ... [2019-11-23 23:25:38,965 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:25:38" (1/1) ... [2019-11-23 23:25:38,967 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:25:38" (1/1) ... [2019-11-23 23:25:38,973 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 23:25:38,974 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 23:25:38,974 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 23:25:38,974 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 23:25:38,975 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:25:38" (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 23:25:39,038 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 23:25:39,038 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 23:25:39,038 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 23:25:39,039 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 23:25:39,039 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 23:25:39,039 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 23:25:39,479 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 23:25:39,480 INFO L284 CfgBuilder]: Removed 9 assume(true) statements. [2019-11-23 23:25:39,481 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 11:25:39 BoogieIcfgContainer [2019-11-23 23:25:39,481 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 23:25:39,482 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 23:25:39,482 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 23:25:39,485 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 23:25:39,486 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 11:25:38" (1/3) ... [2019-11-23 23:25:39,486 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5fee968d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 11:25:39, skipping insertion in model container [2019-11-23 23:25:39,487 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:25:38" (2/3) ... [2019-11-23 23:25:39,487 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5fee968d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 11:25:39, skipping insertion in model container [2019-11-23 23:25:39,487 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 11:25:39" (3/3) ... [2019-11-23 23:25:39,489 INFO L109 eAbstractionObserver]: Analyzing ICFG nr5.c [2019-11-23 23:25:39,498 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 23:25:39,505 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 23:25:39,518 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 23:25:39,542 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 23:25:39,543 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 23:25:39,543 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 23:25:39,543 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 23:25:39,543 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 23:25:39,543 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 23:25:39,543 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 23:25:39,544 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 23:25:39,558 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states. [2019-11-23 23:25:39,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-11-23 23:25:39,563 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 23:25:39,564 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-11-23 23:25:39,565 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 23:25:39,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 23:25:39,570 INFO L82 PathProgramCache]: Analyzing trace with hash -116069518, now seen corresponding path program 1 times [2019-11-23 23:25:39,577 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 23:25:39,578 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214758301] [2019-11-23 23:25:39,578 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 23:25:39,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:25:39,872 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 23:25:39,873 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214758301] [2019-11-23 23:25:39,874 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 23:25:39,874 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 23:25:39,875 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365607945] [2019-11-23 23:25:39,880 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 23:25:39,881 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 23:25:39,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 23:25:39,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 23:25:39,897 INFO L87 Difference]: Start difference. First operand 13 states. Second operand 4 states. [2019-11-23 23:25:39,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 23:25:39,985 INFO L93 Difference]: Finished difference Result 26 states and 33 transitions. [2019-11-23 23:25:39,986 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 23:25:39,987 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2019-11-23 23:25:39,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 23:25:40,000 INFO L225 Difference]: With dead ends: 26 [2019-11-23 23:25:40,001 INFO L226 Difference]: Without dead ends: 12 [2019-11-23 23:25:40,006 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 23:25:40,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2019-11-23 23:25:40,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 11. [2019-11-23 23:25:40,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2019-11-23 23:25:40,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 13 transitions. [2019-11-23 23:25:40,053 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 13 transitions. Word has length 7 [2019-11-23 23:25:40,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 23:25:40,054 INFO L462 AbstractCegarLoop]: Abstraction has 11 states and 13 transitions. [2019-11-23 23:25:40,054 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 23:25:40,054 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 13 transitions. [2019-11-23 23:25:40,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-23 23:25:40,055 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 23:25:40,055 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 23:25:40,056 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 23:25:40,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 23:25:40,057 INFO L82 PathProgramCache]: Analyzing trace with hash -2051170697, now seen corresponding path program 1 times [2019-11-23 23:25:40,057 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 23:25:40,058 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377270416] [2019-11-23 23:25:40,058 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 23:25:40,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:25:40,141 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 23:25:40,141 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377270416] [2019-11-23 23:25:40,141 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 23:25:40,142 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 23:25:40,142 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307281366] [2019-11-23 23:25:40,143 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 23:25:40,144 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 23:25:40,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 23:25:40,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 23:25:40,144 INFO L87 Difference]: Start difference. First operand 11 states and 13 transitions. Second operand 3 states. [2019-11-23 23:25:40,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 23:25:40,162 INFO L93 Difference]: Finished difference Result 19 states and 24 transitions. [2019-11-23 23:25:40,163 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 23:25:40,163 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2019-11-23 23:25:40,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 23:25:40,164 INFO L225 Difference]: With dead ends: 19 [2019-11-23 23:25:40,164 INFO L226 Difference]: Without dead ends: 12 [2019-11-23 23:25:40,165 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 23:25:40,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2019-11-23 23:25:40,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2019-11-23 23:25:40,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2019-11-23 23:25:40,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2019-11-23 23:25:40,174 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 9 [2019-11-23 23:25:40,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 23:25:40,175 INFO L462 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2019-11-23 23:25:40,175 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 23:25:40,175 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2019-11-23 23:25:40,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-23 23:25:40,176 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 23:25:40,176 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 23:25:40,177 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 23:25:40,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 23:25:40,179 INFO L82 PathProgramCache]: Analyzing trace with hash 774643838, now seen corresponding path program 1 times [2019-11-23 23:25:40,179 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 23:25:40,179 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486442003] [2019-11-23 23:25:40,179 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 23:25:40,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:25:40,251 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 23:25:40,252 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486442003] [2019-11-23 23:25:40,252 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [878565816] [2019-11-23 23:25:40,252 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 23:25:40,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:25:40,304 INFO L255 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 23:25:40,310 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 23:25:40,328 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 23:25:40,328 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-23 23:25:40,356 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 23:25:40,356 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1838527469] [2019-11-23 23:25:40,381 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2019-11-23 23:25:40,381 INFO L166 IcfgInterpreter]: Building call graph [2019-11-23 23:25:40,387 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-23 23:25:40,393 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-23 23:25:40,394 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-23 23:25:40,644 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:25:40,714 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:25:40,722 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:25:40,898 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:25:40,913 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:25:40,934 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:25:40,946 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:25:40,956 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:25:41,172 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:25:41,187 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:25:41,219 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:25:41,281 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:25:41,297 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:25:41,312 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:25:41,325 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:25:41,601 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:25:41,617 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:25:41,705 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:25:41,780 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:25:41,860 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:25:41,883 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:25:41,924 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:25:41,940 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:25:41,953 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:25:42,275 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:25:42,301 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:25:42,328 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:25:42,531 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:25:42,578 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:25:42,622 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:25:42,641 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:25:42,658 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:25:42,678 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:25:42,817 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:25:42,861 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:25:43,147 WARN L192 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 143 [2019-11-23 23:25:43,360 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:25:43,396 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:25:43,412 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:25:43,427 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:25:43,502 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:25:43,516 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:25:43,527 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:25:43,593 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:25:43,605 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:25:43,900 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:25:43,916 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:25:43,972 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:25:44,139 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:25:44,237 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:25:44,268 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:25:44,669 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:25:44,689 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:25:44,847 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:25:45,079 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:25:45,135 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:25:45,199 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:25:45,327 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-23 23:25:45,582 WARN L192 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 52 [2019-11-23 23:25:45,779 WARN L192 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 7 [2019-11-23 23:25:45,807 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 23:25:45,807 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-11-23 23:25:45,807 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 6 [2019-11-23 23:25:45,809 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978771112] [2019-11-23 23:25:45,809 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-23 23:25:45,810 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 23:25:45,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-23 23:25:45,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2019-11-23 23:25:45,811 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand 6 states. [2019-11-23 23:25:45,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 23:25:45,833 INFO L93 Difference]: Finished difference Result 23 states and 30 transitions. [2019-11-23 23:25:45,834 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-23 23:25:45,834 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2019-11-23 23:25:45,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 23:25:45,835 INFO L225 Difference]: With dead ends: 23 [2019-11-23 23:25:45,835 INFO L226 Difference]: Without dead ends: 15 [2019-11-23 23:25:45,836 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2019-11-23 23:25:45,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2019-11-23 23:25:45,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2019-11-23 23:25:45,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-11-23 23:25:45,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2019-11-23 23:25:45,839 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 10 [2019-11-23 23:25:45,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 23:25:45,840 INFO L462 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2019-11-23 23:25:45,840 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-23 23:25:45,840 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2019-11-23 23:25:45,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-23 23:25:45,841 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 23:25:45,841 INFO L410 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 23:25:46,049 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 23:25:46,049 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 23:25:46,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 23:25:46,050 INFO L82 PathProgramCache]: Analyzing trace with hash 1850828855, now seen corresponding path program 2 times [2019-11-23 23:25:46,050 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 23:25:46,050 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857582226] [2019-11-23 23:25:46,050 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 23:25:46,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:25:46,125 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 23:25:46,125 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857582226] [2019-11-23 23:25:46,125 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1073606148] [2019-11-23 23:25:46,125 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 23:25:46,164 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-11-23 23:25:46,165 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 23:25:46,166 INFO L255 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-23 23:25:46,167 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 23:25:46,169 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 23:25:46,170 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-23 23:25:46,186 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 23:25:46,186 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [847856598] [2019-11-23 23:25:46,188 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2019-11-23 23:25:46,189 INFO L166 IcfgInterpreter]: Building call graph [2019-11-23 23:25:46,190 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-23 23:25:46,190 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-23 23:25:46,190 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-23 23:25:46,234 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:25:46,244 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:25:46,255 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:25:46,268 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:25:46,344 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:25:46,356 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:25:46,379 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:25:46,389 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:25:46,420 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:25:46,533 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:25:46,544 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:25:46,555 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:25:46,571 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:25:46,596 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:25:46,607 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:25:46,647 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:25:46,810 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:25:46,850 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:25:46,882 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:25:46,896 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:25:46,908 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:25:46,986 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:25:47,072 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:25:47,088 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:25:47,103 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:25:47,277 WARN L192 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 131 [2019-11-23 23:25:47,550 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:25:47,620 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:25:47,677 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:25:47,822 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:25:47,843 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:25:47,859 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:25:47,880 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:25:47,904 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:25:47,919 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:25:47,943 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:25:47,960 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:25:48,513 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:25:48,524 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:25:48,546 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:25:48,558 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:25:48,589 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:25:48,598 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:25:48,607 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:25:48,615 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:25:48,911 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:25:48,917 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:25:48,949 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:25:49,138 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:25:49,307 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:25:49,324 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:25:49,778 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:25:49,791 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:25:49,797 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:25:49,848 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:25:49,920 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:25:50,037 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:25:50,179 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-23 23:25:50,555 WARN L192 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 52 [2019-11-23 23:25:50,799 WARN L192 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 42 [2019-11-23 23:25:50,799 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 23:25:50,800 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-11-23 23:25:50,800 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 7 [2019-11-23 23:25:50,800 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719874792] [2019-11-23 23:25:50,800 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-23 23:25:50,800 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 23:25:50,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-23 23:25:50,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2019-11-23 23:25:50,801 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand 7 states. [2019-11-23 23:25:50,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 23:25:50,839 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2019-11-23 23:25:50,840 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-23 23:25:50,840 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 13 [2019-11-23 23:25:50,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 23:25:50,840 INFO L225 Difference]: With dead ends: 27 [2019-11-23 23:25:50,841 INFO L226 Difference]: Without dead ends: 16 [2019-11-23 23:25:50,841 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2019-11-23 23:25:50,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2019-11-23 23:25:50,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2019-11-23 23:25:50,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-11-23 23:25:50,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2019-11-23 23:25:50,844 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 13 [2019-11-23 23:25:50,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 23:25:50,845 INFO L462 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2019-11-23 23:25:50,845 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-23 23:25:50,845 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2019-11-23 23:25:50,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-23 23:25:50,845 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 23:25:50,846 INFO L410 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 23:25:51,046 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 23:25:51,047 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 23:25:51,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 23:25:51,048 INFO L82 PathProgramCache]: Analyzing trace with hash 1477545662, now seen corresponding path program 3 times [2019-11-23 23:25:51,048 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 23:25:51,048 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318991052] [2019-11-23 23:25:51,048 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 23:25:51,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:25:51,653 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 23:25:51,653 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318991052] [2019-11-23 23:25:51,654 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681740053] [2019-11-23 23:25:51,654 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 23:25:51,704 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 23:25:51,704 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 23:25:51,705 INFO L255 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2019-11-23 23:25:51,710 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 23:25:51,807 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:25:51,935 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:25:52,202 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:25:52,441 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 23:25:52,442 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-23 23:25:55,696 WARN L192 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 30