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_precise.epf -i ../../../trunk/examples/svcomp/memsafety-ext/tree_cnstr_true-valid-memsafety_false-termination.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-2f49842 [2018-01-21 05:47:06,202 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-21 05:47:06,205 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-21 05:47:06,220 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-21 05:47:06,220 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-21 05:47:06,221 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-21 05:47:06,223 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-21 05:47:06,225 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-21 05:47:06,227 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-21 05:47:06,228 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-21 05:47:06,229 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-01-21 05:47:06,229 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-01-21 05:47:06,230 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-01-21 05:47:06,231 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-01-21 05:47:06,232 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-01-21 05:47:06,235 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-01-21 05:47:06,237 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-01-21 05:47:06,239 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-01-21 05:47:06,241 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-01-21 05:47:06,242 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-01-21 05:47:06,244 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-01-21 05:47:06,249 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-01-21 05:47:06,250 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-01-21 05:47:06,250 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_precise.epf [2018-01-21 05:47:06,260 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-21 05:47:06,261 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-21 05:47:06,261 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-21 05:47:06,262 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-21 05:47:06,262 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-21 05:47:06,262 INFO L133 SettingsManager]: * Weq Fattening=true [2018-01-21 05:47:06,262 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-21 05:47:06,262 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-21 05:47:06,263 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-21 05:47:06,263 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-21 05:47:06,263 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-21 05:47:06,264 INFO L133 SettingsManager]: * Check allocation purity=true [2018-01-21 05:47:06,264 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-21 05:47:06,264 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-21 05:47:06,264 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-21 05:47:06,264 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-01-21 05:47:06,264 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-21 05:47:06,265 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-01-21 05:47:06,265 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-21 05:47:06,265 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-01-21 05:47:06,265 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-01-21 05:47:06,265 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-21 05:47:06,266 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-01-21 05:47:06,266 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-21 05:47:06,266 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-21 05:47:06,266 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-21 05:47:06,266 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-21 05:47:06,267 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-21 05:47:06,267 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-21 05:47:06,267 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-21 05:47:06,267 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-21 05:47:06,267 INFO L133 SettingsManager]: * Stop after first violation was found=false [2018-01-21 05:47:06,267 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-01-21 05:47:06,268 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-21 05:47:06,268 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-21 05:47:06,268 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-21 05:47:06,268 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-01-21 05:47:06,269 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-21 05:47:06,269 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-21 05:47:06,304 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-21 05:47:06,317 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-21 05:47:06,321 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-21 05:47:06,323 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-21 05:47:06,324 INFO L276 PluginConnector]: CDTParser initialized [2018-01-21 05:47:06,324 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/memsafety-ext/tree_cnstr_true-valid-memsafety_false-termination.i [2018-01-21 05:47:06,517 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-21 05:47:06,521 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-21 05:47:06,522 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-21 05:47:06,522 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-21 05:47:06,527 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-21 05:47:06,528 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.01 05:47:06" (1/1) ... [2018-01-21 05:47:06,531 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@9c7e9dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 05:47:06, skipping insertion in model container [2018-01-21 05:47:06,531 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.01 05:47:06" (1/1) ... [2018-01-21 05:47:06,545 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-21 05:47:06,582 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-21 05:47:06,704 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-21 05:47:06,727 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-21 05:47:06,737 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 05:47:06 WrapperNode [2018-01-21 05:47:06,737 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-21 05:47:06,738 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-21 05:47:06,738 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-21 05:47:06,739 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-21 05:47:06,754 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 05:47:06" (1/1) ... [2018-01-21 05:47:06,755 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 05:47:06" (1/1) ... [2018-01-21 05:47:06,764 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 05:47:06" (1/1) ... [2018-01-21 05:47:06,764 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 05:47:06" (1/1) ... [2018-01-21 05:47:06,772 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 05:47:06" (1/1) ... [2018-01-21 05:47:06,777 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 05:47:06" (1/1) ... [2018-01-21 05:47:06,779 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 05:47:06" (1/1) ... [2018-01-21 05:47:06,781 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-21 05:47:06,782 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-21 05:47:06,782 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-21 05:47:06,782 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-21 05:47:06,783 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 05:47:06" (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 05:47:06,829 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-21 05:47:06,830 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-21 05:47:06,830 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-21 05:47:06,830 INFO L128 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2018-01-21 05:47:06,830 INFO L128 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2018-01-21 05:47:06,830 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-01-21 05:47:06,830 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-01-21 05:47:06,831 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-01-21 05:47:06,831 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-01-21 05:47:06,831 INFO L128 BoogieDeclarations]: Found specification of procedure malloc [2018-01-21 05:47:06,831 INFO L128 BoogieDeclarations]: Found specification of procedure free [2018-01-21 05:47:06,831 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-21 05:47:06,832 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-21 05:47:06,832 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-21 05:47:07,147 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-21 05:47:07,148 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.01 05:47:07 BoogieIcfgContainer [2018-01-21 05:47:07,148 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-21 05:47:07,149 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-01-21 05:47:07,149 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-01-21 05:47:07,151 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-01-21 05:47:07,152 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.01 05:47:06" (1/3) ... [2018-01-21 05:47:07,153 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14abc9f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.01 05:47:07, skipping insertion in model container [2018-01-21 05:47:07,153 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 05:47:06" (2/3) ... [2018-01-21 05:47:07,153 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14abc9f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.01 05:47:07, skipping insertion in model container [2018-01-21 05:47:07,153 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.01 05:47:07" (3/3) ... [2018-01-21 05:47:07,155 INFO L105 eAbstractionObserver]: Analyzing ICFG tree_cnstr_true-valid-memsafety_false-termination.i [2018-01-21 05:47:07,163 INFO L130 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-01-21 05:47:07,171 INFO L142 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2018-01-21 05:47:07,210 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 05:47:07,210 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 05:47:07,210 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 05:47:07,210 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 05:47:07,211 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 05:47:07,211 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 05:47:07,211 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 05:47:07,211 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.initErr0EnsuresViolation======== [2018-01-21 05:47:07,212 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 05:47:07,229 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states. [2018-01-21 05:47:07,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-01-21 05:47:07,235 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 05:47:07,236 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-01-21 05:47:07,236 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.initErr0EnsuresViolation]=== [2018-01-21 05:47:07,240 INFO L82 PathProgramCache]: Analyzing trace with hash 192202, now seen corresponding path program 1 times [2018-01-21 05:47:07,242 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 05:47:07,285 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 05:47:07,285 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 05:47:07,285 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 05:47:07,285 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 05:47:07,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 05:47:07,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 05:47:07,337 INFO L381 BasicCegarLoop]: Counterexample might be feasible [2018-01-21 05:47:07,344 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 05:47:07,351 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 05:47:07,352 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 05:47:07,352 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 05:47:07,352 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 05:47:07,352 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 05:47:07,352 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 05:47:07,352 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 05:47:07,352 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.startErr0EnsuresViolation======== [2018-01-21 05:47:07,353 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 05:47:07,356 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states. [2018-01-21 05:47:07,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-01-21 05:47:07,357 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 05:47:07,358 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 05:47:07,358 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 05:47:07,358 INFO L82 PathProgramCache]: Analyzing trace with hash -40797007, now seen corresponding path program 1 times [2018-01-21 05:47:07,358 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 05:47:07,359 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 05:47:07,359 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 05:47:07,360 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 05:47:07,360 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 05:47:07,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 05:47:07,383 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 05:47:07,417 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 05:47:07,418 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 05:47:07,418 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-21 05:47:07,418 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 05:47:07,420 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-21 05:47:07,514 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-21 05:47:07,515 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-21 05:47:07,517 INFO L87 Difference]: Start difference. First operand 78 states. Second operand 2 states. [2018-01-21 05:47:07,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 05:47:07,541 INFO L93 Difference]: Finished difference Result 146 states and 180 transitions. [2018-01-21 05:47:07,542 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-21 05:47:07,543 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 16 [2018-01-21 05:47:07,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 05:47:07,553 INFO L225 Difference]: With dead ends: 146 [2018-01-21 05:47:07,554 INFO L226 Difference]: Without dead ends: 75 [2018-01-21 05:47:07,556 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 05:47:07,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-01-21 05:47:07,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2018-01-21 05:47:07,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-01-21 05:47:07,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 88 transitions. [2018-01-21 05:47:07,590 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 88 transitions. Word has length 16 [2018-01-21 05:47:07,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 05:47:07,590 INFO L432 AbstractCegarLoop]: Abstraction has 75 states and 88 transitions. [2018-01-21 05:47:07,591 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-21 05:47:07,591 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 88 transitions. [2018-01-21 05:47:07,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-01-21 05:47:07,592 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 05:47:07,592 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 05:47:07,592 INFO L371 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 05:47:07,592 INFO L82 PathProgramCache]: Analyzing trace with hash -1434130336, now seen corresponding path program 1 times [2018-01-21 05:47:07,592 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 05:47:07,593 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 05:47:07,593 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 05:47:07,593 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 05:47:07,594 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 05:47:07,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 05:47:07,615 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 05:47:07,681 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 05:47:07,682 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 05:47:07,682 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-01-21 05:47:07,682 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 05:47:07,684 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-21 05:47:07,684 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-21 05:47:07,684 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-21 05:47:07,685 INFO L87 Difference]: Start difference. First operand 75 states and 88 transitions. Second operand 4 states. [2018-01-21 05:47:07,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 05:47:07,745 INFO L93 Difference]: Finished difference Result 101 states and 119 transitions. [2018-01-21 05:47:07,746 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-01-21 05:47:07,746 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2018-01-21 05:47:07,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 05:47:07,750 INFO L225 Difference]: With dead ends: 101 [2018-01-21 05:47:07,750 INFO L226 Difference]: Without dead ends: 96 [2018-01-21 05:47:07,751 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-01-21 05:47:07,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2018-01-21 05:47:07,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2018-01-21 05:47:07,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2018-01-21 05:47:07,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 114 transitions. [2018-01-21 05:47:07,764 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 114 transitions. Word has length 19 [2018-01-21 05:47:07,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 05:47:07,764 INFO L432 AbstractCegarLoop]: Abstraction has 96 states and 114 transitions. [2018-01-21 05:47:07,764 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-21 05:47:07,764 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 114 transitions. [2018-01-21 05:47:07,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-01-21 05:47:07,766 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 05:47:07,766 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] [2018-01-21 05:47:07,766 INFO L371 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 05:47:07,766 INFO L82 PathProgramCache]: Analyzing trace with hash 327687223, now seen corresponding path program 1 times [2018-01-21 05:47:07,767 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 05:47:07,768 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 05:47:07,768 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 05:47:07,768 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 05:47:07,768 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 05:47:07,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 05:47:07,783 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 05:47:07,820 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-21 05:47:07,821 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 05:47:07,821 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-21 05:47:07,821 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 05:47:07,821 INFO L409 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-01-21 05:47:07,822 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-01-21 05:47:07,822 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-01-21 05:47:07,822 INFO L87 Difference]: Start difference. First operand 96 states and 114 transitions. Second operand 3 states. [2018-01-21 05:47:07,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 05:47:07,856 INFO L93 Difference]: Finished difference Result 145 states and 175 transitions. [2018-01-21 05:47:07,856 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-01-21 05:47:07,856 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2018-01-21 05:47:07,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 05:47:07,858 INFO L225 Difference]: With dead ends: 145 [2018-01-21 05:47:07,858 INFO L226 Difference]: Without dead ends: 98 [2018-01-21 05:47:07,859 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 05:47:07,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2018-01-21 05:47:07,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2018-01-21 05:47:07,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2018-01-21 05:47:07,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 116 transitions. [2018-01-21 05:47:07,870 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 116 transitions. Word has length 28 [2018-01-21 05:47:07,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 05:47:07,870 INFO L432 AbstractCegarLoop]: Abstraction has 98 states and 116 transitions. [2018-01-21 05:47:07,870 INFO L433 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-01-21 05:47:07,871 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 116 transitions. [2018-01-21 05:47:07,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-01-21 05:47:07,872 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 05:47:07,872 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] [2018-01-21 05:47:07,872 INFO L371 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 05:47:07,873 INFO L82 PathProgramCache]: Analyzing trace with hash -1119090828, now seen corresponding path program 1 times [2018-01-21 05:47:07,873 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 05:47:07,874 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 05:47:07,874 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 05:47:07,874 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 05:47:07,874 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 05:47:07,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 05:47:07,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 05:47:07,923 INFO L381 BasicCegarLoop]: Counterexample might be feasible [2018-01-21 05:47:07,930 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 05:47:07,935 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 05:47:07,936 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 05:47:07,950 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 05:47:07,950 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 05:47:07,951 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 05:47:07,951 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 05:47:07,951 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 05:47:07,951 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 05:47:07,951 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 05:47:07,951 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == mainErr0EnsuresViolation======== [2018-01-21 05:47:07,951 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 05:47:07,953 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states. [2018-01-21 05:47:07,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-01-21 05:47:07,954 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 05:47:07,955 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 05:47:07,955 INFO L371 AbstractCegarLoop]: === Iteration 1 === [mainErr0EnsuresViolation]=== [2018-01-21 05:47:07,955 INFO L82 PathProgramCache]: Analyzing trace with hash -911773288, now seen corresponding path program 1 times [2018-01-21 05:47:07,955 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 05:47:07,956 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 05:47:07,956 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 05:47:07,956 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 05:47:07,956 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 05:47:07,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 05:47:07,964 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 05:47:07,975 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 05:47:07,975 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 05:47:07,975 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-21 05:47:07,975 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 05:47:07,975 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-21 05:47:07,976 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-21 05:47:07,976 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-21 05:47:07,976 INFO L87 Difference]: Start difference. First operand 78 states. Second operand 2 states. [2018-01-21 05:47:07,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 05:47:07,983 INFO L93 Difference]: Finished difference Result 146 states and 180 transitions. [2018-01-21 05:47:07,983 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-21 05:47:07,984 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 14 [2018-01-21 05:47:07,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 05:47:07,985 INFO L225 Difference]: With dead ends: 146 [2018-01-21 05:47:07,985 INFO L226 Difference]: Without dead ends: 73 [2018-01-21 05:47:07,986 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 05:47:07,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-01-21 05:47:07,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2018-01-21 05:47:07,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-01-21 05:47:07,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 86 transitions. [2018-01-21 05:47:07,992 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 86 transitions. Word has length 14 [2018-01-21 05:47:07,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 05:47:07,992 INFO L432 AbstractCegarLoop]: Abstraction has 73 states and 86 transitions. [2018-01-21 05:47:07,992 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-21 05:47:07,992 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 86 transitions. [2018-01-21 05:47:07,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-01-21 05:47:07,993 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 05:47:07,993 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 05:47:07,993 INFO L371 AbstractCegarLoop]: === Iteration 2 === [mainErr0EnsuresViolation]=== [2018-01-21 05:47:07,994 INFO L82 PathProgramCache]: Analyzing trace with hash 244317447, now seen corresponding path program 1 times [2018-01-21 05:47:07,994 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 05:47:07,995 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 05:47:07,995 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 05:47:07,995 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 05:47:07,995 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 05:47:08,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 05:47:08,006 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 05:47:08,041 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 05:47:08,041 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 05:47:08,041 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-01-21 05:47:08,041 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 05:47:08,042 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-21 05:47:08,042 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-21 05:47:08,042 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-21 05:47:08,042 INFO L87 Difference]: Start difference. First operand 73 states and 86 transitions. Second operand 4 states. [2018-01-21 05:47:08,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 05:47:08,062 INFO L93 Difference]: Finished difference Result 97 states and 115 transitions. [2018-01-21 05:47:08,063 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-01-21 05:47:08,063 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2018-01-21 05:47:08,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 05:47:08,064 INFO L225 Difference]: With dead ends: 97 [2018-01-21 05:47:08,064 INFO L226 Difference]: Without dead ends: 94 [2018-01-21 05:47:08,065 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-01-21 05:47:08,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2018-01-21 05:47:08,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2018-01-21 05:47:08,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2018-01-21 05:47:08,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 112 transitions. [2018-01-21 05:47:08,072 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 112 transitions. Word has length 17 [2018-01-21 05:47:08,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 05:47:08,073 INFO L432 AbstractCegarLoop]: Abstraction has 94 states and 112 transitions. [2018-01-21 05:47:08,073 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-21 05:47:08,073 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 112 transitions. [2018-01-21 05:47:08,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-01-21 05:47:08,074 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 05:47:08,074 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] [2018-01-21 05:47:08,074 INFO L371 AbstractCegarLoop]: === Iteration 3 === [mainErr0EnsuresViolation]=== [2018-01-21 05:47:08,075 INFO L82 PathProgramCache]: Analyzing trace with hash -844350818, now seen corresponding path program 1 times [2018-01-21 05:47:08,075 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 05:47:08,075 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 05:47:08,076 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 05:47:08,076 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 05:47:08,076 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 05:47:08,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 05:47:08,087 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 05:47:08,106 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-21 05:47:08,107 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 05:47:08,107 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-21 05:47:08,107 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 05:47:08,107 INFO L409 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-01-21 05:47:08,108 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-01-21 05:47:08,108 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-01-21 05:47:08,108 INFO L87 Difference]: Start difference. First operand 94 states and 112 transitions. Second operand 3 states. [2018-01-21 05:47:08,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 05:47:08,119 INFO L93 Difference]: Finished difference Result 141 states and 171 transitions. [2018-01-21 05:47:08,119 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-01-21 05:47:08,120 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2018-01-21 05:47:08,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 05:47:08,121 INFO L225 Difference]: With dead ends: 141 [2018-01-21 05:47:08,121 INFO L226 Difference]: Without dead ends: 96 [2018-01-21 05:47:08,122 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 05:47:08,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2018-01-21 05:47:08,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2018-01-21 05:47:08,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2018-01-21 05:47:08,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 114 transitions. [2018-01-21 05:47:08,130 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 114 transitions. Word has length 26 [2018-01-21 05:47:08,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 05:47:08,130 INFO L432 AbstractCegarLoop]: Abstraction has 96 states and 114 transitions. [2018-01-21 05:47:08,130 INFO L433 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-01-21 05:47:08,131 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 114 transitions. [2018-01-21 05:47:08,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-01-21 05:47:08,132 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 05:47:08,132 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] [2018-01-21 05:47:08,132 INFO L371 AbstractCegarLoop]: === Iteration 4 === [mainErr0EnsuresViolation]=== [2018-01-21 05:47:08,132 INFO L82 PathProgramCache]: Analyzing trace with hash 217829659, now seen corresponding path program 1 times [2018-01-21 05:47:08,132 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 05:47:08,133 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 05:47:08,134 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 05:47:08,134 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 05:47:08,134 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 05:47:08,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 05:47:08,150 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 05:47:08,290 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-21 05:47:08,290 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 05:47:08,291 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-21 05:47:08,292 INFO L199 CegarAbsIntRunner]: Running AI on error trace of length 29 with the following transitions: [2018-01-21 05:47:08,294 INFO L201 CegarAbsIntRunner]: [0], [1], [7], [8], [9], [10], [14], [16], [19], [102], [106], [110], [112], [116], [118], [119], [124], [125], [126], [130], [160], [162], [166], [168], [169], [170], [171] [2018-01-21 05:47:08,358 INFO L147 AbstractInterpreter]: Using domain VPDomain [2018-01-21 05:47:08,358 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