java -Xmx6000000000 -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data ./data --generate-csv --csv-dir ../../../releaseScripts/default/UAutomizer-linux/csv -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/ai/eq-bench/mempurity-32bit-Automizer_Taipan+AI_EQ_mostprecise.epf -i ../../../trunk/examples/svcomp/memsafety/960521-1_true-valid-memsafety.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-2f49842 [2018-01-21 02:57:11,117 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-21 02:57:11,119 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-21 02:57:11,136 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-21 02:57:11,137 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-21 02:57:11,138 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-21 02:57:11,139 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-21 02:57:11,141 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-21 02:57:11,145 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-21 02:57:11,146 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-21 02:57:11,146 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-01-21 02:57:11,147 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-01-21 02:57:11,148 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-01-21 02:57:11,149 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-01-21 02:57:11,150 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-01-21 02:57:11,153 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-01-21 02:57:11,155 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-01-21 02:57:11,157 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-01-21 02:57:11,159 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-01-21 02:57:11,160 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-01-21 02:57:11,163 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-01-21 02:57:11,169 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-01-21 02:57:11,170 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-01-21 02:57:11,170 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/eq-bench/mempurity-32bit-Automizer_Taipan+AI_EQ_mostprecise.epf [2018-01-21 02:57:11,199 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-21 02:57:11,200 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-21 02:57:11,201 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-21 02:57:11,201 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-21 02:57:11,201 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-21 02:57:11,201 INFO L133 SettingsManager]: * Weq Fattening=true [2018-01-21 02:57:11,201 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-21 02:57:11,202 INFO L133 SettingsManager]: * Precise comparison operator=true [2018-01-21 02:57:11,202 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-21 02:57:11,203 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-21 02:57:11,203 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-21 02:57:11,203 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-21 02:57:11,203 INFO L133 SettingsManager]: * Check allocation purity=true [2018-01-21 02:57:11,204 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-21 02:57:11,204 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-21 02:57:11,204 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-21 02:57:11,204 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-01-21 02:57:11,204 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-21 02:57:11,205 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-01-21 02:57:11,205 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-21 02:57:11,205 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-01-21 02:57:11,205 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-01-21 02:57:11,205 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-21 02:57:11,206 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-01-21 02:57:11,206 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-21 02:57:11,206 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-21 02:57:11,206 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-21 02:57:11,206 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-21 02:57:11,206 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-21 02:57:11,207 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-21 02:57:11,207 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-21 02:57:11,207 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-21 02:57:11,207 INFO L133 SettingsManager]: * Stop after first violation was found=false [2018-01-21 02:57:11,207 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-01-21 02:57:11,207 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-21 02:57:11,208 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-21 02:57:11,208 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-21 02:57:11,208 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-01-21 02:57:11,209 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-21 02:57:11,209 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-21 02:57:11,257 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-21 02:57:11,308 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-21 02:57:11,315 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-21 02:57:11,317 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-21 02:57:11,318 INFO L276 PluginConnector]: CDTParser initialized [2018-01-21 02:57:11,319 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/memsafety/960521-1_true-valid-memsafety.i [2018-01-21 02:57:11,502 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-21 02:57:11,507 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-21 02:57:11,508 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-21 02:57:11,508 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-21 02:57:11,513 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-21 02:57:11,514 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.01 02:57:11" (1/1) ... [2018-01-21 02:57:11,516 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1e6c4eb1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 02:57:11, skipping insertion in model container [2018-01-21 02:57:11,516 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.01 02:57:11" (1/1) ... [2018-01-21 02:57:11,532 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-21 02:57:11,589 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-21 02:57:11,713 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-21 02:57:11,729 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-21 02:57:11,736 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 02:57:11 WrapperNode [2018-01-21 02:57:11,737 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-21 02:57:11,738 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-21 02:57:11,738 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-21 02:57:11,738 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-21 02:57:11,756 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 02:57:11" (1/1) ... [2018-01-21 02:57:11,756 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 02:57:11" (1/1) ... [2018-01-21 02:57:11,766 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 02:57:11" (1/1) ... [2018-01-21 02:57:11,766 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 02:57:11" (1/1) ... [2018-01-21 02:57:11,769 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 02:57:11" (1/1) ... [2018-01-21 02:57:11,772 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 02:57:11" (1/1) ... [2018-01-21 02:57:11,773 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 02:57:11" (1/1) ... [2018-01-21 02:57:11,774 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-21 02:57:11,775 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-21 02:57:11,775 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-21 02:57:11,775 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-21 02:57:11,776 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 02:57:11" (1/1) ... No working directory specified, using /storage/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 [2018-01-21 02:57:11,854 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-21 02:57:11,854 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-21 02:57:11,854 INFO L136 BoogieDeclarations]: Found implementation of procedure foo [2018-01-21 02:57:11,854 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-21 02:57:11,854 INFO L128 BoogieDeclarations]: Found specification of procedure write~int [2018-01-21 02:57:11,854 INFO L128 BoogieDeclarations]: Found specification of procedure read~int [2018-01-21 02:57:11,854 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-01-21 02:57:11,854 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-01-21 02:57:11,855 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-01-21 02:57:11,855 INFO L128 BoogieDeclarations]: Found specification of procedure malloc [2018-01-21 02:57:11,855 INFO L128 BoogieDeclarations]: Found specification of procedure free [2018-01-21 02:57:11,855 INFO L128 BoogieDeclarations]: Found specification of procedure foo [2018-01-21 02:57:11,855 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-21 02:57:11,855 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-21 02:57:11,855 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-21 02:57:12,017 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-21 02:57:12,018 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.01 02:57:12 BoogieIcfgContainer [2018-01-21 02:57:12,018 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-21 02:57:12,018 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-01-21 02:57:12,019 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-01-21 02:57:12,020 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-01-21 02:57:12,021 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.01 02:57:11" (1/3) ... [2018-01-21 02:57:12,021 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73e9ad2e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.01 02:57:12, skipping insertion in model container [2018-01-21 02:57:12,022 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 02:57:11" (2/3) ... [2018-01-21 02:57:12,022 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73e9ad2e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.01 02:57:12, skipping insertion in model container [2018-01-21 02:57:12,022 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.01 02:57:12" (3/3) ... [2018-01-21 02:57:12,023 INFO L105 eAbstractionObserver]: Analyzing ICFG 960521-1_true-valid-memsafety.i [2018-01-21 02:57:12,030 INFO L130 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-01-21 02:57:12,035 INFO L142 ceAbstractionStarter]: Appying trace abstraction to program that has 4 error locations. [2018-01-21 02:57:12,092 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 02:57:12,092 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 02:57:12,093 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 02:57:12,093 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 02:57:12,093 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 02:57:12,093 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 02:57:12,093 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 02:57:12,093 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.initErr0EnsuresViolation======== [2018-01-21 02:57:12,094 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 02:57:12,114 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states. [2018-01-21 02:57:12,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-01-21 02:57:12,120 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 02:57:12,121 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-01-21 02:57:12,121 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.initErr0EnsuresViolation]=== [2018-01-21 02:57:12,125 INFO L82 PathProgramCache]: Analyzing trace with hash 90336, now seen corresponding path program 1 times [2018-01-21 02:57:12,128 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 02:57:12,170 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 02:57:12,170 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 02:57:12,170 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 02:57:12,170 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 02:57:12,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 02:57:12,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 02:57:12,241 INFO L381 BasicCegarLoop]: Counterexample might be feasible [2018-01-21 02:57:12,249 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 02:57:12,259 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 02:57:12,259 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 02:57:12,259 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 02:57:12,259 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 02:57:12,259 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 02:57:12,259 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 02:57:12,259 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 02:57:12,260 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooErr0EnsuresViolation======== [2018-01-21 02:57:12,260 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 02:57:12,261 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states. [2018-01-21 02:57:12,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-01-21 02:57:12,263 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 02:57:12,263 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 02:57:12,263 INFO L371 AbstractCegarLoop]: === Iteration 1 === [fooErr0EnsuresViolation]=== [2018-01-21 02:57:12,263 INFO L82 PathProgramCache]: Analyzing trace with hash 935443697, now seen corresponding path program 1 times [2018-01-21 02:57:12,263 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 02:57:12,264 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 02:57:12,264 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 02:57:12,264 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 02:57:12,265 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 02:57:12,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 02:57:12,300 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 02:57:12,344 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-21 02:57:12,346 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 02:57:12,346 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-21 02:57:12,346 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 02:57:12,349 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-21 02:57:12,360 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-21 02:57:12,361 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-21 02:57:12,362 INFO L87 Difference]: Start difference. First operand 40 states. Second operand 2 states. [2018-01-21 02:57:12,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 02:57:12,448 INFO L93 Difference]: Finished difference Result 60 states and 67 transitions. [2018-01-21 02:57:12,448 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-21 02:57:12,450 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 18 [2018-01-21 02:57:12,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 02:57:12,456 INFO L225 Difference]: With dead ends: 60 [2018-01-21 02:57:12,456 INFO L226 Difference]: Without dead ends: 0 [2018-01-21 02:57:12,459 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-21 02:57:12,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-01-21 02:57:12,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-01-21 02:57:12,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-01-21 02:57:12,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-01-21 02:57:12,479 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 18 [2018-01-21 02:57:12,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 02:57:12,479 INFO L432 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-01-21 02:57:12,479 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-21 02:57:12,479 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-01-21 02:57:12,479 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-01-21 02:57:12,482 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 02:57:12,482 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 02:57:12,482 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 02:57:12,482 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 02:57:12,482 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 02:57:12,483 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 02:57:12,483 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 02:57:12,483 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.startErr0EnsuresViolation======== [2018-01-21 02:57:12,483 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 02:57:12,484 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states. [2018-01-21 02:57:12,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-01-21 02:57:12,486 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 02:57:12,486 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 02:57:12,486 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 02:57:12,487 INFO L82 PathProgramCache]: Analyzing trace with hash 1172106943, now seen corresponding path program 1 times [2018-01-21 02:57:12,487 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 02:57:12,488 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 02:57:12,488 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 02:57:12,488 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 02:57:12,488 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 02:57:12,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 02:57:12,508 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 02:57:12,534 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-21 02:57:12,535 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 02:57:12,535 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-21 02:57:12,535 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 02:57:12,535 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-21 02:57:12,536 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-21 02:57:12,536 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-21 02:57:12,536 INFO L87 Difference]: Start difference. First operand 40 states. Second operand 2 states. [2018-01-21 02:57:12,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 02:57:12,541 INFO L93 Difference]: Finished difference Result 60 states and 67 transitions. [2018-01-21 02:57:12,541 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-21 02:57:12,541 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 27 [2018-01-21 02:57:12,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 02:57:12,545 INFO L225 Difference]: With dead ends: 60 [2018-01-21 02:57:12,545 INFO L226 Difference]: Without dead ends: 36 [2018-01-21 02:57:12,545 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-21 02:57:12,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-01-21 02:57:12,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-01-21 02:57:12,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-01-21 02:57:12,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2018-01-21 02:57:12,556 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 27 [2018-01-21 02:57:12,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 02:57:12,556 INFO L432 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2018-01-21 02:57:12,557 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-21 02:57:12,557 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2018-01-21 02:57:12,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-01-21 02:57:12,558 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 02:57:12,558 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 02:57:12,558 INFO L371 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 02:57:12,558 INFO L82 PathProgramCache]: Analyzing trace with hash -862637837, now seen corresponding path program 1 times [2018-01-21 02:57:12,559 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 02:57:12,560 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 02:57:12,560 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 02:57:12,560 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 02:57:12,561 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 02:57:12,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 02:57:12,582 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 02:57:12,679 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-21 02:57:12,680 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 02:57:12,680 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-21 02:57:12,680 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 02:57:12,682 INFO L409 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-01-21 02:57:12,682 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-01-21 02:57:12,682 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-01-21 02:57:12,683 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 3 states. [2018-01-21 02:57:12,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 02:57:12,750 INFO L93 Difference]: Finished difference Result 58 states and 62 transitions. [2018-01-21 02:57:12,751 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-01-21 02:57:12,751 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2018-01-21 02:57:12,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 02:57:12,752 INFO L225 Difference]: With dead ends: 58 [2018-01-21 02:57:12,753 INFO L226 Difference]: Without dead ends: 45 [2018-01-21 02:57:12,753 INFO L525 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 [2018-01-21 02:57:12,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-01-21 02:57:12,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 38. [2018-01-21 02:57:12,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-01-21 02:57:12,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2018-01-21 02:57:12,760 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 29 [2018-01-21 02:57:12,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 02:57:12,760 INFO L432 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2018-01-21 02:57:12,760 INFO L433 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-01-21 02:57:12,761 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2018-01-21 02:57:12,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-01-21 02:57:12,762 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 02:57:12,762 INFO L322 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 02:57:12,762 INFO L371 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 02:57:12,762 INFO L82 PathProgramCache]: Analyzing trace with hash -1162981958, now seen corresponding path program 1 times [2018-01-21 02:57:12,763 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 02:57:12,764 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 02:57:12,764 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 02:57:12,764 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 02:57:12,764 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 02:57:12,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 02:57:12,795 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 02:57:12,888 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-01-21 02:57:12,888 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 02:57:12,888 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-21 02:57:12,889 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 02:57:12,889 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-21 02:57:12,889 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-21 02:57:12,890 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-01-21 02:57:12,890 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand 5 states. [2018-01-21 02:57:13,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 02:57:13,030 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2018-01-21 02:57:13,030 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-01-21 02:57:13,030 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 33 [2018-01-21 02:57:13,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 02:57:13,031 INFO L225 Difference]: With dead ends: 43 [2018-01-21 02:57:13,031 INFO L226 Difference]: Without dead ends: 36 [2018-01-21 02:57:13,032 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2018-01-21 02:57:13,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-01-21 02:57:13,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-01-21 02:57:13,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-01-21 02:57:13,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2018-01-21 02:57:13,036 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 33 [2018-01-21 02:57:13,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 02:57:13,036 INFO L432 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2018-01-21 02:57:13,036 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-21 02:57:13,037 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2018-01-21 02:57:13,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-01-21 02:57:13,037 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 02:57:13,037 INFO L322 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 02:57:13,037 INFO L371 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 02:57:13,038 INFO L82 PathProgramCache]: Analyzing trace with hash -1789723842, now seen corresponding path program 1 times [2018-01-21 02:57:13,038 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 02:57:13,038 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 02:57:13,039 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 02:57:13,039 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 02:57:13,039 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 02:57:13,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 02:57:13,060 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 02:57:13,196 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-01-21 02:57:13,197 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 02:57:13,197 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-21 02:57:13,197 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 02:57:13,197 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-21 02:57:13,198 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-21 02:57:13,198 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-01-21 02:57:13,198 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 5 states. [2018-01-21 02:57:13,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 02:57:13,321 INFO L93 Difference]: Finished difference Result 60 states and 62 transitions. [2018-01-21 02:57:13,321 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-21 02:57:13,321 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 33 [2018-01-21 02:57:13,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 02:57:13,322 INFO L225 Difference]: With dead ends: 60 [2018-01-21 02:57:13,322 INFO L226 Difference]: Without dead ends: 42 [2018-01-21 02:57:13,323 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-01-21 02:57:13,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-01-21 02:57:13,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 38. [2018-01-21 02:57:13,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-01-21 02:57:13,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2018-01-21 02:57:13,327 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 33 [2018-01-21 02:57:13,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 02:57:13,327 INFO L432 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2018-01-21 02:57:13,327 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-21 02:57:13,327 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2018-01-21 02:57:13,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-01-21 02:57:13,328 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 02:57:13,328 INFO L322 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 02:57:13,329 INFO L371 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 02:57:13,329 INFO L82 PathProgramCache]: Analyzing trace with hash -1424676713, now seen corresponding path program 1 times [2018-01-21 02:57:13,329 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 02:57:13,330 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 02:57:13,330 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 02:57:13,330 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 02:57:13,330 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 02:57:13,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 02:57:13,344 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 02:57:13,397 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-01-21 02:57:13,397 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 02:57:13,397 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-21 02:57:13,399 INFO L199 CegarAbsIntRunner]: Running AI on error trace of length 38 with the following transitions: [2018-01-21 02:57:13,401 INFO L201 CegarAbsIntRunner]: [0], [1], [3], [7], [10], [12], [13], [15], [19], [23], [26], [28], [29], [31], [35], [40], [41], [42], [43], [44], [45], [46], [47], [49], [56], [57], [58], [60], [61], [63], [64], [65], [66], [67], [68] [2018-01-21 02:57:13,458 INFO L147 AbstractInterpreter]: Using domain VPDomain [2018-01-21 02:57:13,458 INFO L101 FixpointEngine]: Starting fixpoint engine with domain VPDomain (maxUnwinding=3, maxParallelStates=2) Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown