/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -i ../../../trunk/examples/svcomp/array-examples/standard_copy2_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 23:03:00,871 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 23:03:00,874 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 23:03:00,893 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-23 23:03:00,917 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 23:03:00,921 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 23:03:00,923 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 23:03:00,924 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 23:03:00,924 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 23:03:00,925 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 23:03:00,927 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 23:03:00,929 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 23:03:00,930 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 23:03:00,931 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 23:03:00,932 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 23:03:00,933 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 23:03:00,935 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 23:03:00,945 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 23:03:00,945 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 23:03:00,946 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 23:03:00,947 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 23:03:00,967 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 23:03:00,967 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 23:03:00,968 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-23 23:03:00,968 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-23 23:03:00,968 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-23 23:03:00,969 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-23 23:03:00,969 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-23 23:03:00,969 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-23 23:03:00,969 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-23 23:03:00,969 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-23 23:03:00,970 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-23 23:03:00,970 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-23 23:03:00,970 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-23 23:03:00,970 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-23 23:03:00,971 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-23 23:03:00,972 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 23:03:00,972 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 23:03:00,973 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 23:03:00,973 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 23:03:00,973 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 23:03:00,973 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 23:03:00,973 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 23:03:00,974 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 23:03:00,974 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 23:03:00,974 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 23:03:00,974 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 23:03:00,974 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 23:03:00,975 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 23:03:00,975 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 23:03:00,975 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 23:03:00,975 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 23:03:00,975 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 23:03:00,976 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 23:03:00,977 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-23 23:03:00,977 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 23:03:00,977 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 23:03:00,977 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 23:03:00,977 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-23 23:03:01,272 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 23:03:01,287 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 23:03:01,290 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 23:03:01,291 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 23:03:01,292 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 23:03:01,292 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_copy2_ground-2.i [2019-11-23 23:03:01,354 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/90de7e84a/eec2eb54df6849f98ba6a49d7ecc2c87/FLAGd14f877a0 [2019-11-23 23:03:01,788 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 23:03:01,788 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_copy2_ground-2.i [2019-11-23 23:03:01,794 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/90de7e84a/eec2eb54df6849f98ba6a49d7ecc2c87/FLAGd14f877a0 [2019-11-23 23:03:02,211 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/90de7e84a/eec2eb54df6849f98ba6a49d7ecc2c87 [2019-11-23 23:03:02,221 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 23:03:02,222 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 23:03:02,223 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 23:03:02,223 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 23:03:02,225 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 23:03:02,226 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 11:03:02" (1/1) ... [2019-11-23 23:03:02,229 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@60a20e1f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:03:02, skipping insertion in model container [2019-11-23 23:03:02,229 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 11:03:02" (1/1) ... [2019-11-23 23:03:02,236 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 23:03:02,251 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 23:03:02,433 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 23:03:02,436 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 23:03:02,455 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 23:03:02,473 INFO L208 MainTranslator]: Completed translation [2019-11-23 23:03:02,473 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:03:02 WrapperNode [2019-11-23 23:03:02,473 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 23:03:02,474 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 23:03:02,474 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 23:03:02,474 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 23:03:02,480 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:03:02" (1/1) ... [2019-11-23 23:03:02,562 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:03:02" (1/1) ... [2019-11-23 23:03:02,581 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 23:03:02,582 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 23:03:02,582 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 23:03:02,582 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 23:03:02,591 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:03:02" (1/1) ... [2019-11-23 23:03:02,591 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:03:02" (1/1) ... [2019-11-23 23:03:02,593 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:03:02" (1/1) ... [2019-11-23 23:03:02,594 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:03:02" (1/1) ... [2019-11-23 23:03:02,600 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:03:02" (1/1) ... [2019-11-23 23:03:02,605 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:03:02" (1/1) ... [2019-11-23 23:03:02,606 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:03:02" (1/1) ... [2019-11-23 23:03:02,608 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 23:03:02,609 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 23:03:02,609 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 23:03:02,609 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 23:03:02,610 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:03:02" (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 23:03:02,664 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 23:03:02,665 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 23:03:02,665 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 23:03:02,665 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 23:03:02,665 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 23:03:02,665 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 23:03:03,036 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 23:03:03,037 INFO L284 CfgBuilder]: Removed 10 assume(true) statements. [2019-11-23 23:03:03,038 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 11:03:03 BoogieIcfgContainer [2019-11-23 23:03:03,038 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 23:03:03,039 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 23:03:03,039 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 23:03:03,042 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 23:03:03,042 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 11:03:02" (1/3) ... [2019-11-23 23:03:03,043 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11d36114 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 11:03:03, skipping insertion in model container [2019-11-23 23:03:03,044 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:03:02" (2/3) ... [2019-11-23 23:03:03,044 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11d36114 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 11:03:03, skipping insertion in model container [2019-11-23 23:03:03,044 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 11:03:03" (3/3) ... [2019-11-23 23:03:03,046 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_copy2_ground-2.i [2019-11-23 23:03:03,055 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 23:03:03,061 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 23:03:03,071 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 23:03:03,092 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 23:03:03,092 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 23:03:03,092 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 23:03:03,092 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 23:03:03,093 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 23:03:03,093 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 23:03:03,093 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 23:03:03,093 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 23:03:03,109 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states. [2019-11-23 23:03:03,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-11-23 23:03:03,119 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 23:03:03,121 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-11-23 23:03:03,121 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 23:03:03,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 23:03:03,127 INFO L82 PathProgramCache]: Analyzing trace with hash -652315547, now seen corresponding path program 1 times [2019-11-23 23:03:03,134 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 23:03:03,135 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447829428] [2019-11-23 23:03:03,135 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 23:03:03,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:03:03,287 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 23:03:03,288 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447829428] [2019-11-23 23:03:03,288 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 23:03:03,289 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-23 23:03:03,289 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694161928] [2019-11-23 23:03:03,294 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 23:03:03,295 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 23:03:03,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 23:03:03,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 23:03:03,311 INFO L87 Difference]: Start difference. First operand 10 states. Second operand 3 states. [2019-11-23 23:03:03,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 23:03:03,340 INFO L93 Difference]: Finished difference Result 19 states and 27 transitions. [2019-11-23 23:03:03,341 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 23:03:03,342 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2019-11-23 23:03:03,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 23:03:03,352 INFO L225 Difference]: With dead ends: 19 [2019-11-23 23:03:03,352 INFO L226 Difference]: Without dead ends: 10 [2019-11-23 23:03:03,356 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 23:03:03,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2019-11-23 23:03:03,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2019-11-23 23:03:03,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2019-11-23 23:03:03,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 13 transitions. [2019-11-23 23:03:03,392 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 13 transitions. Word has length 7 [2019-11-23 23:03:03,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 23:03:03,393 INFO L462 AbstractCegarLoop]: Abstraction has 10 states and 13 transitions. [2019-11-23 23:03:03,393 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 23:03:03,393 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 13 transitions. [2019-11-23 23:03:03,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-23 23:03:03,394 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 23:03:03,394 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 23:03:03,395 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 23:03:03,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 23:03:03,395 INFO L82 PathProgramCache]: Analyzing trace with hash -611776766, now seen corresponding path program 1 times [2019-11-23 23:03:03,395 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 23:03:03,396 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853532545] [2019-11-23 23:03:03,396 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 23:03:03,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:03:03,455 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 23:03:03,455 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853532545] [2019-11-23 23:03:03,455 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 23:03:03,456 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 23:03:03,456 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765114884] [2019-11-23 23:03:03,458 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 23:03:03,458 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 23:03:03,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 23:03:03,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 23:03:03,459 INFO L87 Difference]: Start difference. First operand 10 states and 13 transitions. Second operand 3 states. [2019-11-23 23:03:03,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 23:03:03,491 INFO L93 Difference]: Finished difference Result 18 states and 24 transitions. [2019-11-23 23:03:03,492 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 23:03:03,492 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2019-11-23 23:03:03,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 23:03:03,493 INFO L225 Difference]: With dead ends: 18 [2019-11-23 23:03:03,493 INFO L226 Difference]: Without dead ends: 12 [2019-11-23 23:03:03,494 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 23:03:03,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2019-11-23 23:03:03,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2019-11-23 23:03:03,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2019-11-23 23:03:03,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 15 transitions. [2019-11-23 23:03:03,502 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 15 transitions. Word has length 8 [2019-11-23 23:03:03,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 23:03:03,503 INFO L462 AbstractCegarLoop]: Abstraction has 12 states and 15 transitions. [2019-11-23 23:03:03,503 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 23:03:03,503 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 15 transitions. [2019-11-23 23:03:03,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-23 23:03:03,504 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 23:03:03,504 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 23:03:03,504 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 23:03:03,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 23:03:03,506 INFO L82 PathProgramCache]: Analyzing trace with hash -1571353927, now seen corresponding path program 1 times [2019-11-23 23:03:03,506 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 23:03:03,506 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403720032] [2019-11-23 23:03:03,506 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 23:03:03,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:03:03,596 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-23 23:03:03,596 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403720032] [2019-11-23 23:03:03,596 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750246018] [2019-11-23 23:03:03,597 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 23:03:03,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:03:03,656 INFO L255 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 23:03:03,661 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 23:03:03,723 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-23 23:03:03,724 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-23 23:03:03,755 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-23 23:03:03,756 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1857516457] [2019-11-23 23:03:03,795 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2019-11-23 23:03:03,795 INFO L166 IcfgInterpreter]: Building call graph [2019-11-23 23:03:03,803 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-23 23:03:03,809 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-23 23:03:03,810 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-23 23:03:05,182 WARN L192 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 134 [2019-11-23 23:03:05,309 WARN L192 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 134 [2019-11-23 23:03:05,771 WARN L192 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2019-11-23 23:03:05,918 WARN L192 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 148 [2019-11-23 23:03:06,066 WARN L192 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 148 [2019-11-23 23:03:06,233 WARN L192 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 152 [2019-11-23 23:03:06,359 WARN L192 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 152 [2019-11-23 23:03:06,500 WARN L192 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 155 [2019-11-23 23:03:08,859 WARN L192 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 175 DAG size of output: 172 [2019-11-23 23:03:09,787 WARN L192 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 178 DAG size of output: 176 [2019-11-23 23:03:11,731 WARN L192 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 187 DAG size of output: 186 [2019-11-23 23:03:24,149 WARN L192 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 231 [2019-11-23 23:03:26,512 WARN L192 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 251 DAG size of output: 246 [2019-11-23 23:03:28,190 WARN L192 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 255 DAG size of output: 250 [2019-11-23 23:03:29,908 WARN L192 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 257 DAG size of output: 254 [2019-11-23 23:03:33,260 WARN L192 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 264 DAG size of output: 263 [2019-11-23 23:03:34,830 WARN L192 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 269 DAG size of output: 266 [2019-11-23 23:03:36,580 WARN L192 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 270 DAG size of output: 270 [2019-11-23 23:03:38,057 WARN L192 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 279 DAG size of output: 277 [2019-11-23 23:03:38,181 WARN L192 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 278 DAG size of output: 273 [2019-11-23 23:03:38,424 WARN L192 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 276 DAG size of output: 276 [2019-11-23 23:03:39,923 WARN L192 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 283 DAG size of output: 281 [2019-11-23 23:03:40,044 WARN L192 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 282 DAG size of output: 279 [2019-11-23 23:03:40,209 WARN L192 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 281 [2019-11-23 23:03:40,318 WARN L192 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 282 DAG size of output: 281 [2019-11-23 23:03:40,582 WARN L192 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 285 DAG size of output: 285 [2019-11-23 23:03:42,251 WARN L192 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 289 [2019-11-23 23:03:42,458 WARN L192 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 290 DAG size of output: 290 [2019-11-23 23:03:44,294 WARN L192 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 294 [2019-11-23 23:03:44,409 WARN L192 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 295 DAG size of output: 294 [2019-11-23 23:03:46,124 WARN L192 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 301 DAG size of output: 299 [2019-11-23 23:03:46,252 WARN L192 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 300 DAG size of output: 297 [2019-11-23 23:03:48,303 WARN L192 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 300 [2019-11-23 23:03:48,438 WARN L192 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 301 DAG size of output: 299 [2019-11-23 23:03:50,277 WARN L192 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 301 [2019-11-23 23:03:50,405 WARN L192 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 302 DAG size of output: 299 [2019-11-23 23:03:50,528 WARN L192 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 300 [2019-11-23 23:03:50,648 WARN L192 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 301 DAG size of output: 301 [2019-11-23 23:03:52,646 WARN L192 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 306 DAG size of output: 306 [2019-11-23 23:03:54,656 WARN L192 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 329 DAG size of output: 328 [2019-11-23 23:03:54,799 WARN L192 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 329 DAG size of output: 323 [2019-11-23 23:03:56,931 WARN L192 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 326 [2019-11-23 23:03:57,066 WARN L192 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 327 DAG size of output: 327 [2019-11-23 23:03:59,210 WARN L192 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 331 [2019-11-23 23:03:59,353 WARN L192 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 332 DAG size of output: 330 [2019-11-23 23:04:01,576 WARN L192 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 337 DAG size of output: 335 [2019-11-23 23:04:01,725 WARN L192 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 336 DAG size of output: 335 [2019-11-23 23:04:03,989 WARN L192 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 345 DAG size of output: 343 [2019-11-23 23:04:04,157 WARN L192 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 344 DAG size of output: 335 [2019-11-23 23:04:04,297 WARN L192 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 334 [2019-11-23 23:04:04,423 WARN L192 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 335 DAG size of output: 335 [2019-11-23 23:04:06,826 WARN L192 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 344 DAG size of output: 341 [2019-11-23 23:04:06,968 WARN L192 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 342 DAG size of output: 339 [2019-11-23 23:04:09,592 WARN L192 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 342 [2019-11-23 23:04:09,766 WARN L192 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 343 DAG size of output: 342 [2019-11-23 23:04:12,553 WARN L192 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 345 [2019-11-23 23:04:12,724 WARN L192 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 346 DAG size of output: 345 [2019-11-23 23:04:15,404 WARN L192 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 348 [2019-11-23 23:04:15,565 WARN L192 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 349 DAG size of output: 348 [2019-11-23 23:04:15,725 WARN L192 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 351 [2019-11-23 23:04:15,884 WARN L192 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 352 DAG size of output: 352 [2019-11-23 23:04:18,230 WARN L192 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 359 DAG size of output: 357 [2019-11-23 23:04:18,399 WARN L192 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 358 DAG size of output: 357 [2019-11-23 23:04:21,447 WARN L192 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 368 DAG size of output: 366 [2019-11-23 23:04:21,627 WARN L192 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 367 DAG size of output: 362 [2019-11-23 23:04:24,573 WARN L192 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 366 [2019-11-23 23:04:24,755 WARN L192 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 367 DAG size of output: 365 [2019-11-23 23:04:27,848 WARN L192 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 370 DAG size of output: 369 [2019-11-23 23:04:28,036 WARN L192 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 370 DAG size of output: 368 [2019-11-23 23:04:30,905 WARN L192 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 372 [2019-11-23 23:04:31,114 WARN L192 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 373 DAG size of output: 372 [2019-11-23 23:04:34,014 WARN L192 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 375 [2019-11-23 23:04:34,203 WARN L192 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 376 DAG size of output: 374 [2019-11-23 23:04:34,388 WARN L192 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 376 [2019-11-23 23:04:34,552 WARN L192 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 377 DAG size of output: 377