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/ldv-memsafety/ArraysWithLenghtAtDeclaration_true-valid-memsafety_true-termination.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-2f49842 [2018-01-21 03:22:56,182 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-21 03:22:56,184 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-21 03:22:56,202 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-21 03:22:56,203 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-21 03:22:56,203 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-21 03:22:56,204 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-21 03:22:56,206 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-21 03:22:56,208 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-21 03:22:56,208 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-21 03:22:56,209 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-01-21 03:22:56,209 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-01-21 03:22:56,211 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-01-21 03:22:56,212 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-01-21 03:22:56,213 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-01-21 03:22:56,216 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-01-21 03:22:56,219 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-01-21 03:22:56,221 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-01-21 03:22:56,223 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-01-21 03:22:56,224 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-01-21 03:22:56,227 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-01-21 03:22:56,233 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-01-21 03:22:56,234 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-01-21 03:22:56,234 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 03:22:56,245 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-21 03:22:56,245 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-21 03:22:56,246 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-21 03:22:56,247 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-21 03:22:56,247 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-21 03:22:56,247 INFO L133 SettingsManager]: * Weq Fattening=true [2018-01-21 03:22:56,247 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-21 03:22:56,247 INFO L133 SettingsManager]: * Precise comparison operator=true [2018-01-21 03:22:56,248 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-21 03:22:56,248 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-21 03:22:56,249 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-21 03:22:56,249 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-21 03:22:56,249 INFO L133 SettingsManager]: * Check allocation purity=true [2018-01-21 03:22:56,249 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-21 03:22:56,250 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-21 03:22:56,250 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-21 03:22:56,250 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-01-21 03:22:56,250 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-21 03:22:56,250 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-01-21 03:22:56,250 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-21 03:22:56,251 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-01-21 03:22:56,251 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-01-21 03:22:56,251 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-21 03:22:56,251 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-01-21 03:22:56,252 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-21 03:22:56,252 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-21 03:22:56,252 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-21 03:22:56,252 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-21 03:22:56,253 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-21 03:22:56,253 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-21 03:22:56,253 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-21 03:22:56,253 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-21 03:22:56,253 INFO L133 SettingsManager]: * Stop after first violation was found=false [2018-01-21 03:22:56,254 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-01-21 03:22:56,254 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-21 03:22:56,254 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-21 03:22:56,254 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-21 03:22:56,254 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-01-21 03:22:56,255 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-21 03:22:56,256 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-21 03:22:56,292 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-21 03:22:56,306 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-21 03:22:56,310 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-21 03:22:56,312 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-21 03:22:56,313 INFO L276 PluginConnector]: CDTParser initialized [2018-01-21 03:22:56,313 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-memsafety/ArraysWithLenghtAtDeclaration_true-valid-memsafety_true-termination.c [2018-01-21 03:22:56,445 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-21 03:22:56,450 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-21 03:22:56,451 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-21 03:22:56,451 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-21 03:22:56,458 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-21 03:22:56,459 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.01 03:22:56" (1/1) ... [2018-01-21 03:22:56,462 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5530d006 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 03:22:56, skipping insertion in model container [2018-01-21 03:22:56,462 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.01 03:22:56" (1/1) ... [2018-01-21 03:22:56,475 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-21 03:22:56,493 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-21 03:22:56,612 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-21 03:22:56,637 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-21 03:22:56,644 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 03:22:56 WrapperNode [2018-01-21 03:22:56,645 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-21 03:22:56,646 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-21 03:22:56,646 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-21 03:22:56,646 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-21 03:22:56,657 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 03:22:56" (1/1) ... [2018-01-21 03:22:56,658 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 03:22:56" (1/1) ... [2018-01-21 03:22:56,666 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 03:22:56" (1/1) ... [2018-01-21 03:22:56,666 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 03:22:56" (1/1) ... [2018-01-21 03:22:56,670 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 03:22:56" (1/1) ... [2018-01-21 03:22:56,673 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 03:22:56" (1/1) ... [2018-01-21 03:22:56,674 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 03:22:56" (1/1) ... [2018-01-21 03:22:56,677 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-21 03:22:56,677 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-21 03:22:56,678 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-21 03:22:56,678 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-21 03:22:56,679 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 03:22:56" (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 03:22:56,734 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-21 03:22:56,734 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-21 03:22:56,734 INFO L136 BoogieDeclarations]: Found implementation of procedure foo [2018-01-21 03:22:56,734 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-21 03:22:56,734 INFO L128 BoogieDeclarations]: Found specification of procedure write~int [2018-01-21 03:22:56,735 INFO L128 BoogieDeclarations]: Found specification of procedure read~int [2018-01-21 03:22:56,735 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-01-21 03:22:56,735 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-01-21 03:22:56,735 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-01-21 03:22:56,735 INFO L128 BoogieDeclarations]: Found specification of procedure foo [2018-01-21 03:22:56,735 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-21 03:22:56,735 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-21 03:22:56,736 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-21 03:22:56,963 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-21 03:22:56,963 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.01 03:22:56 BoogieIcfgContainer [2018-01-21 03:22:56,964 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-21 03:22:56,965 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-01-21 03:22:56,965 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-01-21 03:22:56,968 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-01-21 03:22:56,968 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.01 03:22:56" (1/3) ... [2018-01-21 03:22:56,969 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@322bcf18 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.01 03:22:56, skipping insertion in model container [2018-01-21 03:22:56,970 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 03:22:56" (2/3) ... [2018-01-21 03:22:56,970 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@322bcf18 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.01 03:22:56, skipping insertion in model container [2018-01-21 03:22:56,970 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.01 03:22:56" (3/3) ... [2018-01-21 03:22:56,973 INFO L105 eAbstractionObserver]: Analyzing ICFG ArraysWithLenghtAtDeclaration_true-valid-memsafety_true-termination.c [2018-01-21 03:22:56,983 INFO L130 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-01-21 03:22:56,993 INFO L142 ceAbstractionStarter]: Appying trace abstraction to program that has 4 error locations. [2018-01-21 03:22:57,043 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 03:22:57,043 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 03:22:57,044 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 03:22:57,044 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 03:22:57,044 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 03:22:57,044 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 03:22:57,044 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 03:22:57,044 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.initErr0EnsuresViolation======== [2018-01-21 03:22:57,045 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 03:22:57,067 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states. [2018-01-21 03:22:57,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-01-21 03:22:57,074 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 03:22:57,075 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-01-21 03:22:57,075 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.initErr0EnsuresViolation]=== [2018-01-21 03:22:57,081 INFO L82 PathProgramCache]: Analyzing trace with hash 100907, now seen corresponding path program 1 times [2018-01-21 03:22:57,084 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 03:22:57,143 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:22:57,143 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 03:22:57,143 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:22:57,143 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 03:22:57,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 03:22:57,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 03:22:57,197 INFO L381 BasicCegarLoop]: Counterexample might be feasible [2018-01-21 03:22:57,204 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 03:22:57,210 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 03:22:57,210 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 03:22:57,210 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 03:22:57,210 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 03:22:57,210 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 03:22:57,211 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 03:22:57,211 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 03:22:57,211 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooErr0EnsuresViolation======== [2018-01-21 03:22:57,211 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 03:22:57,212 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states. [2018-01-21 03:22:57,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-01-21 03:22:57,213 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 03:22:57,213 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 03:22:57,213 INFO L371 AbstractCegarLoop]: === Iteration 1 === [fooErr0EnsuresViolation]=== [2018-01-21 03:22:57,214 INFO L82 PathProgramCache]: Analyzing trace with hash 352444009, now seen corresponding path program 1 times [2018-01-21 03:22:57,214 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 03:22:57,215 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:22:57,215 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 03:22:57,215 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:22:57,215 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 03:22:57,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 03:22:57,238 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 03:22:57,269 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 03:22:57,270 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 03:22:57,270 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-21 03:22:57,271 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 03:22:57,272 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-21 03:22:57,283 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-21 03:22:57,284 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-21 03:22:57,287 INFO L87 Difference]: Start difference. First operand 41 states. Second operand 2 states. [2018-01-21 03:22:57,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 03:22:57,317 INFO L93 Difference]: Finished difference Result 72 states and 86 transitions. [2018-01-21 03:22:57,317 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-21 03:22:57,319 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 15 [2018-01-21 03:22:57,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 03:22:57,328 INFO L225 Difference]: With dead ends: 72 [2018-01-21 03:22:57,328 INFO L226 Difference]: Without dead ends: 0 [2018-01-21 03:22:57,332 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 03:22:57,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-01-21 03:22:57,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-01-21 03:22:57,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-01-21 03:22:57,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-01-21 03:22:57,428 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 15 [2018-01-21 03:22:57,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 03:22:57,429 INFO L432 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-01-21 03:22:57,429 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-21 03:22:57,429 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-01-21 03:22:57,429 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-01-21 03:22:57,432 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 03:22:57,432 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 03:22:57,433 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 03:22:57,433 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 03:22:57,433 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 03:22:57,433 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 03:22:57,433 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 03:22:57,433 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.startErr0EnsuresViolation======== [2018-01-21 03:22:57,433 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 03:22:57,435 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states. [2018-01-21 03:22:57,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-01-21 03:22:57,436 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 03:22:57,436 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 03:22:57,436 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 03:22:57,437 INFO L82 PathProgramCache]: Analyzing trace with hash -1481761889, now seen corresponding path program 1 times [2018-01-21 03:22:57,437 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 03:22:57,438 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:22:57,438 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 03:22:57,438 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:22:57,438 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 03:22:57,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 03:22:57,446 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 03:22:57,460 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 03:22:57,460 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 03:22:57,460 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-21 03:22:57,461 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 03:22:57,461 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-21 03:22:57,461 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-21 03:22:57,461 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-21 03:22:57,462 INFO L87 Difference]: Start difference. First operand 41 states. Second operand 2 states. [2018-01-21 03:22:57,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 03:22:57,468 INFO L93 Difference]: Finished difference Result 72 states and 86 transitions. [2018-01-21 03:22:57,468 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-21 03:22:57,469 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 17 [2018-01-21 03:22:57,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 03:22:57,471 INFO L225 Difference]: With dead ends: 72 [2018-01-21 03:22:57,471 INFO L226 Difference]: Without dead ends: 37 [2018-01-21 03:22:57,472 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 03:22:57,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-01-21 03:22:57,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-01-21 03:22:57,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-01-21 03:22:57,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 40 transitions. [2018-01-21 03:22:57,484 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 40 transitions. Word has length 17 [2018-01-21 03:22:57,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 03:22:57,485 INFO L432 AbstractCegarLoop]: Abstraction has 37 states and 40 transitions. [2018-01-21 03:22:57,485 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-21 03:22:57,485 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 40 transitions. [2018-01-21 03:22:57,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-01-21 03:22:57,486 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 03:22:57,486 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 03:22:57,486 INFO L371 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 03:22:57,487 INFO L82 PathProgramCache]: Analyzing trace with hash 499012364, now seen corresponding path program 1 times [2018-01-21 03:22:57,487 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 03:22:57,488 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:22:57,488 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 03:22:57,488 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:22:57,488 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 03:22:57,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 03:22:57,502 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 03:22:57,538 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 03:22:57,538 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 03:22:57,539 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-21 03:22:57,539 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 03:22:57,540 INFO L409 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-01-21 03:22:57,541 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-01-21 03:22:57,541 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-01-21 03:22:57,541 INFO L87 Difference]: Start difference. First operand 37 states and 40 transitions. Second operand 3 states. [2018-01-21 03:22:57,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 03:22:57,591 INFO L93 Difference]: Finished difference Result 66 states and 74 transitions. [2018-01-21 03:22:57,592 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-01-21 03:22:57,592 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2018-01-21 03:22:57,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 03:22:57,595 INFO L225 Difference]: With dead ends: 66 [2018-01-21 03:22:57,595 INFO L226 Difference]: Without dead ends: 51 [2018-01-21 03:22:57,596 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 03:22:57,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-01-21 03:22:57,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 41. [2018-01-21 03:22:57,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-01-21 03:22:57,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions. [2018-01-21 03:22:57,608 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 19 [2018-01-21 03:22:57,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 03:22:57,609 INFO L432 AbstractCegarLoop]: Abstraction has 41 states and 44 transitions. [2018-01-21 03:22:57,609 INFO L433 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-01-21 03:22:57,609 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2018-01-21 03:22:57,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-01-21 03:22:57,610 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 03:22:57,610 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] [2018-01-21 03:22:57,610 INFO L371 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 03:22:57,611 INFO L82 PathProgramCache]: Analyzing trace with hash 1504830404, now seen corresponding path program 1 times [2018-01-21 03:22:57,611 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 03:22:57,612 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:22:57,612 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 03:22:57,613 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:22:57,613 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 03:22:57,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 03:22:57,632 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 03:22:57,793 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 03:22:57,794 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 03:22:57,794 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-21 03:22:57,795 INFO L199 CegarAbsIntRunner]: Running AI on error trace of length 32 with the following transitions: [2018-01-21 03:22:57,796 INFO L201 CegarAbsIntRunner]: [0], [1], [3], [7], [10], [20], [21], [26], [27], [28], [29], [33], [36], [38], [40], [42], [46], [50], [55], [58], [60], [61], [62], [72], [74], [75], [76], [77], [78], [79] [2018-01-21 03:22:57,846 INFO L147 AbstractInterpreter]: Using domain VPDomain [2018-01-21 03:22:57,846 INFO L101 FixpointEngine]: Starting fixpoint engine with domain VPDomain (maxUnwinding=3, maxParallelStates=2) [2018-01-21 03:23:00,880 INFO L259 AbstractInterpreter]: Some error location(s) were reachable [2018-01-21 03:23:00,881 INFO L268 AbstractInterpreter]: Visited 30 different actions 82 times. Merged at 14 different actions 31 times. Never widened. Found 4 fixpoints after 3 different actions. Largest state had 17 variables. [2018-01-21 03:23:00,925 INFO L434 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-01-21 03:23:00,926 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 03:23:00,926 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-21 03:23:00,932 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 03:23:00,932 INFO L280 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-01-21 03:23:00,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 03:23:00,971 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-21 03:23:01,130 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 03:23:01,130 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-21 03:23:01,383 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 03:23:01,421 INFO L320 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-01-21 03:23:01,421 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [8] total 12 [2018-01-21 03:23:01,422 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 03:23:01,422 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-21 03:23:01,422 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-21 03:23:01,423 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2018-01-21 03:23:01,423 INFO L87 Difference]: Start difference. First operand 41 states and 44 transitions. Second operand 5 states. [2018-01-21 03:23:01,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 03:23:01,526 INFO L93 Difference]: Finished difference Result 80 states and 87 transitions. [2018-01-21 03:23:01,526 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-21 03:23:01,527 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 31 [2018-01-21 03:23:01,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 03:23:01,528 INFO L225 Difference]: With dead ends: 80 [2018-01-21 03:23:01,528 INFO L226 Difference]: Without dead ends: 46 [2018-01-21 03:23:01,528 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 56 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2018-01-21 03:23:01,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-01-21 03:23:01,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 43. [2018-01-21 03:23:01,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-01-21 03:23:01,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 46 transitions. [2018-01-21 03:23:01,536 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 46 transitions. Word has length 31 [2018-01-21 03:23:01,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 03:23:01,536 INFO L432 AbstractCegarLoop]: Abstraction has 43 states and 46 transitions. [2018-01-21 03:23:01,536 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-21 03:23:01,536 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 46 transitions. [2018-01-21 03:23:01,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-01-21 03:23:01,538 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 03:23:01,538 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] [2018-01-21 03:23:01,538 INFO L371 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 03:23:01,539 INFO L82 PathProgramCache]: Analyzing trace with hash -151955344, now seen corresponding path program 1 times [2018-01-21 03:23:01,539 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 03:23:01,540 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:23:01,540 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 03:23:01,540 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:23:01,540 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 03:23:01,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 03:23:01,556 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 03:23:01,638 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 03:23:01,638 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 03:23:01,638 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-21 03:23:01,638 INFO L199 CegarAbsIntRunner]: Running AI on error trace of length 37 with the following transitions: [2018-01-21 03:23:01,639 INFO L201 CegarAbsIntRunner]: [0], [1], [3], [7], [10], [12], [13], [14], [16], [20], [21], [26], [27], [28], [29], [33], [36], [38], [40], [42], [46], [50], [55], [58], [60], [61], [62], [72], [74], [75], [76], [77], [78], [79] [2018-01-21 03:23:01,640 INFO L147 AbstractInterpreter]: Using domain VPDomain [2018-01-21 03:23:01,642 INFO L101 FixpointEngine]: Starting fixpoint engine with domain VPDomain (maxUnwinding=3, maxParallelStates=2) [2018-01-21 03:23:03,568 INFO L259 AbstractInterpreter]: Some error location(s) were reachable [2018-01-21 03:23:03,569 INFO L268 AbstractInterpreter]: Visited 34 different actions 110 times. Merged at 22 different actions 51 times. Never widened. Found 9 fixpoints after 5 different actions. Largest state had 21 variables. [2018-01-21 03:23:03,614 INFO L434 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-01-21 03:23:03,615 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 03:23:03,615 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-21 03:23:03,626 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 03:23:03,626 INFO L280 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-01-21 03:23:03,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 03:23:03,651 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-21 03:23:03,662 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 03:23:03,662 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-21 03:23:03,707 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 03:23:03,741 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 03:23:03,741 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 4 with cvc4 --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with cvc4 --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-01-21 03:23:03,746 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 03:23:03,747 INFO L280 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-01-21 03:23:03,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 03:23:03,776 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-21 03:23:03,781 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 03:23:03,781 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-21 03:23:03,837 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 03:23:03,842 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-01-21 03:23:03,843 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4] total 7 [2018-01-21 03:23:03,843 INFO L247 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-01-21 03:23:03,843 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-21 03:23:03,843 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-21 03:23:03,843 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-01-21 03:23:03,843 INFO L87 Difference]: Start difference. First operand 43 states and 46 transitions. Second operand 5 states. [2018-01-21 03:23:03,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 03:23:03,925 INFO L93 Difference]: Finished difference Result 84 states and 94 transitions. [2018-01-21 03:23:03,926 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-01-21 03:23:03,926 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 36 [2018-01-21 03:23:03,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 03:23:03,927 INFO L225 Difference]: With dead ends: 84 [2018-01-21 03:23:03,927 INFO L226 Difference]: Without dead ends: 67 [2018-01-21 03:23:03,928 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-01-21 03:23:03,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-01-21 03:23:03,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 52. [2018-01-21 03:23:03,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-01-21 03:23:03,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 57 transitions. [2018-01-21 03:23:03,933 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 57 transitions. Word has length 36 [2018-01-21 03:23:03,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 03:23:03,934 INFO L432 AbstractCegarLoop]: Abstraction has 52 states and 57 transitions. [2018-01-21 03:23:03,934 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-21 03:23:03,934 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 57 transitions. [2018-01-21 03:23:03,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-01-21 03:23:03,936 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 03:23:03,936 INFO L322 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 03:23:03,936 INFO L371 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 03:23:03,936 INFO L82 PathProgramCache]: Analyzing trace with hash 1862415341, now seen corresponding path program 2 times [2018-01-21 03:23:03,936 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 03:23:03,937 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:23:03,937 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 03:23:03,937 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:23:03,937 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 03:23:03,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 03:23:03,956 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 03:23:04,032 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2018-01-21 03:23:04,032 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 03:23:04,032 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-21 03:23:04,032 INFO L183 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-01-21 03:23:04,032 INFO L434 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-01-21 03:23:04,032 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 03:23:04,033 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-21 03:23:04,038 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-21 03:23:04,039 INFO L280 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-01-21 03:23:04,050 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-21 03:23:04,061 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-21 03:23:04,065 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-21 03:23:04,069 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-21 03:23:04,147 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 23 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-01-21 03:23:04,147 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-21 03:23:04,326 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 23 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-01-21 03:23:04,347 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 03:23:04,348 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 6 with cvc4 --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with cvc4 --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-01-21 03:23:04,351 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-21 03:23:04,351 INFO L280 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-01-21 03:23:04,363 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-21 03:23:04,378 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-21 03:23:04,388 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-21 03:23:04,392 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-21 03:23:04,403 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2018-01-21 03:23:04,403 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-21 03:23:04,458 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2018-01-21 03:23:04,459 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-01-21 03:23:04,460 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7, 5, 5] total 16 [2018-01-21 03:23:04,460 INFO L247 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-01-21 03:23:04,460 INFO L409 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-01-21 03:23:04,460 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-01-21 03:23:04,461 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2018-01-21 03:23:04,461 INFO L87 Difference]: Start difference. First operand 52 states and 57 transitions. Second operand 10 states. [2018-01-21 03:23:04,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 03:23:04,624 INFO L93 Difference]: Finished difference Result 148 states and 168 transitions. [2018-01-21 03:23:04,625 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-01-21 03:23:04,625 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 52 [2018-01-21 03:23:04,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 03:23:04,627 INFO L225 Difference]: With dead ends: 148 [2018-01-21 03:23:04,627 INFO L226 Difference]: Without dead ends: 111 [2018-01-21 03:23:04,628 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 193 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2018-01-21 03:23:04,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2018-01-21 03:23:04,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 77. [2018-01-21 03:23:04,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-01-21 03:23:04,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 85 transitions. [2018-01-21 03:23:04,640 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 85 transitions. Word has length 52 [2018-01-21 03:23:04,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 03:23:04,640 INFO L432 AbstractCegarLoop]: Abstraction has 77 states and 85 transitions. [2018-01-21 03:23:04,641 INFO L433 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-01-21 03:23:04,641 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 85 transitions. [2018-01-21 03:23:04,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-01-21 03:23:04,643 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 03:23:04,644 INFO L322 BasicCegarLoop]: trace histogram [8, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 03:23:04,644 INFO L371 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 03:23:04,644 INFO L82 PathProgramCache]: Analyzing trace with hash 298957008, now seen corresponding path program 3 times [2018-01-21 03:23:04,644 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 03:23:04,645 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:23:04,645 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-21 03:23:04,646 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:23:04,646 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 03:23:04,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 03:23:04,674 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 03:23:04,774 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2018-01-21 03:23:04,774 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 03:23:04,774 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-21 03:23:04,774 INFO L183 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-01-21 03:23:04,775 INFO L434 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-01-21 03:23:04,775 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 03:23:04,775 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-21 03:23:04,793 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-21 03:23:04,793 INFO L280 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-01-21 03:23:04,805 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-21 03:23:04,809 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-21 03:23:04,813 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-21 03:23:04,820 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-21 03:23:04,822 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-21 03:23:04,826 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-21 03:23:04,893 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 64 proven. 9 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2018-01-21 03:23:04,894 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-21 03:23:05,081 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 64 proven. 9 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2018-01-21 03:23:05,101 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 03:23:05,101 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 8 with cvc4 --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with cvc4 --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-01-21 03:23:05,104 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-21 03:23:05,104 INFO L280 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-01-21 03:23:05,119 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-21 03:23:05,129 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-21 03:23:05,148 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-21 03:23:05,172 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-21 03:23:05,183 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-21 03:23:05,189 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-21 03:23:05,213 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2018-01-21 03:23:05,213 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-21 03:23:05,253 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2018-01-21 03:23:05,255 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-01-21 03:23:05,255 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8, 6, 6] total 19 [2018-01-21 03:23:05,255 INFO L247 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-01-21 03:23:05,256 INFO L409 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-01-21 03:23:05,256 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-01-21 03:23:05,256 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2018-01-21 03:23:05,257 INFO L87 Difference]: Start difference. First operand 77 states and 85 transitions. Second operand 10 states. [2018-01-21 03:23:05,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 03:23:05,396 INFO L93 Difference]: Finished difference Result 194 states and 220 transitions. [2018-01-21 03:23:05,396 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-01-21 03:23:05,396 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 78 [2018-01-21 03:23:05,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 03:23:05,398 INFO L225 Difference]: With dead ends: 194 [2018-01-21 03:23:05,398 INFO L226 Difference]: Without dead ends: 169 [2018-01-21 03:23:05,399 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 298 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=123, Invalid=339, Unknown=0, NotChecked=0, Total=462 [2018-01-21 03:23:05,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2018-01-21 03:23:05,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 115. [2018-01-21 03:23:05,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2018-01-21 03:23:05,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 130 transitions. [2018-01-21 03:23:05,414 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 130 transitions. Word has length 78 [2018-01-21 03:23:05,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 03:23:05,415 INFO L432 AbstractCegarLoop]: Abstraction has 115 states and 130 transitions. [2018-01-21 03:23:05,415 INFO L433 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-01-21 03:23:05,415 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 130 transitions. [2018-01-21 03:23:05,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2018-01-21 03:23:05,417 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 03:23:05,418 INFO L322 BasicCegarLoop]: trace histogram [13, 9, 9, 9, 9, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 03:23:05,418 INFO L371 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 03:23:05,418 INFO L82 PathProgramCache]: Analyzing trace with hash 1844537761, now seen corresponding path program 4 times [2018-01-21 03:23:05,418 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 03:23:05,419 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:23:05,419 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-21 03:23:05,419 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:23:05,419 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 03:23:05,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 03:23:05,447 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 03:23:05,558 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2018-01-21 03:23:05,558 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 03:23:05,558 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-21 03:23:05,558 INFO L183 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-01-21 03:23:05,558 INFO L434 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-01-21 03:23:05,558 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 03:23:05,558 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-21 03:23:05,564 INFO L101 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-01-21 03:23:05,564 INFO L280 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-01-21 03:23:05,588 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-21 03:23:05,591 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-21 03:23:05,667 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 173 proven. 21 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2018-01-21 03:23:05,667 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-21 03:23:05,845 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 173 proven. 21 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2018-01-21 03:23:05,879 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 03:23:05,879 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 10 with cvc4 --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with cvc4 --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-01-21 03:23:05,885 INFO L101 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-01-21 03:23:05,885 INFO L280 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-01-21 03:23:05,930 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-21 03:23:05,936 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-21 03:23:05,955 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 173 proven. 21 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2018-01-21 03:23:05,956 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-21 03:23:06,165 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 173 proven. 21 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2018-01-21 03:23:06,166 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-01-21 03:23:06,167 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 11, 11, 11, 11] total 20 [2018-01-21 03:23:06,167 INFO L247 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-01-21 03:23:06,167 INFO L409 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-01-21 03:23:06,167 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-01-21 03:23:06,167 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2018-01-21 03:23:06,168 INFO L87 Difference]: Start difference. First operand 115 states and 130 transitions. Second operand 16 states. [2018-01-21 03:23:06,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 03:23:06,448 INFO L93 Difference]: Finished difference Result 311 states and 357 transitions. [2018-01-21 03:23:06,449 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-01-21 03:23:06,449 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 109 [2018-01-21 03:23:06,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 03:23:06,452 INFO L225 Difference]: With dead ends: 311 [2018-01-21 03:23:06,452 INFO L226 Difference]: Without dead ends: 241 [2018-01-21 03:23:06,454 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 449 GetRequests, 411 SyntacticMatches, 12 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=156, Invalid=600, Unknown=0, NotChecked=0, Total=756 [2018-01-21 03:23:06,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2018-01-21 03:23:06,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 150. [2018-01-21 03:23:06,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2018-01-21 03:23:06,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 169 transitions. [2018-01-21 03:23:06,474 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 169 transitions. Word has length 109 [2018-01-21 03:23:06,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 03:23:06,474 INFO L432 AbstractCegarLoop]: Abstraction has 150 states and 169 transitions. [2018-01-21 03:23:06,474 INFO L433 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-01-21 03:23:06,475 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 169 transitions. [2018-01-21 03:23:06,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2018-01-21 03:23:06,478 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 03:23:06,478 INFO L322 BasicCegarLoop]: trace histogram [18, 13, 13, 13, 13, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 03:23:06,478 INFO L371 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 03:23:06,479 INFO L82 PathProgramCache]: Analyzing trace with hash 1349347824, now seen corresponding path program 5 times [2018-01-21 03:23:06,479 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 03:23:06,480 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:23:06,480 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-21 03:23:06,480 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:23:06,480 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 03:23:06,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 03:23:06,510 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 03:23:06,623 INFO L134 CoverageAnalysis]: Checked inductivity of 640 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 580 trivial. 0 not checked. [2018-01-21 03:23:06,623 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 03:23:06,623 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-21 03:23:06,624 INFO L183 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-01-21 03:23:06,624 INFO L434 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-01-21 03:23:06,624 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 03:23:06,624 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-21 03:23:06,631 INFO L101 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-01-21 03:23:06,631 INFO L280 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder INSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-01-21 03:23:06,643 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-21 03:23:06,646 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-21 03:23:06,647 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-21 03:23:06,650 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-21 03:23:06,655 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-21 03:23:06,660 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-21 03:23:06,661 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-21 03:23:06,665 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-21 03:23:06,791 INFO L134 CoverageAnalysis]: Checked inductivity of 640 backedges. 392 proven. 49 refuted. 0 times theorem prover too weak. 199 trivial. 0 not checked. [2018-01-21 03:23:06,791 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-21 03:23:07,025 INFO L134 CoverageAnalysis]: Checked inductivity of 640 backedges. 95 proven. 270 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2018-01-21 03:23:07,046 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 03:23:07,046 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 12 with cvc4 --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with cvc4 --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-01-21 03:23:07,049 INFO L101 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-01-21 03:23:07,049 INFO L280 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder INSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-01-21 03:23:07,061 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-21 03:23:07,065 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-21 03:23:07,071 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-21 03:23:07,081 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-21 03:23:07,099 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-21 03:23:07,121 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-21 03:23:07,134 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-21 03:23:07,139 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-21 03:23:07,156 INFO L134 CoverageAnalysis]: Checked inductivity of 640 backedges. 392 proven. 49 refuted. 0 times theorem prover too weak. 199 trivial. 0 not checked. [2018-01-21 03:23:07,156 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-21 03:23:07,331 INFO L134 CoverageAnalysis]: Checked inductivity of 640 backedges. 95 proven. 270 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2018-01-21 03:23:07,333 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-01-21 03:23:07,333 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 11, 11, 11] total 22 [2018-01-21 03:23:07,333 INFO L247 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-01-21 03:23:07,334 INFO L409 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-01-21 03:23:07,334 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-01-21 03:23:07,334 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2018-01-21 03:23:07,334 INFO L87 Difference]: Start difference. First operand 150 states and 169 transitions. Second operand 17 states. [2018-01-21 03:23:07,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 03:23:07,708 INFO L93 Difference]: Finished difference Result 336 states and 379 transitions. [2018-01-21 03:23:07,708 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-01-21 03:23:07,708 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 140 [2018-01-21 03:23:07,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 03:23:07,710 INFO L225 Difference]: With dead ends: 336 [2018-01-21 03:23:07,710 INFO L226 Difference]: Without dead ends: 197 [2018-01-21 03:23:07,711 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 586 GetRequests, 539 SyntacticMatches, 12 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=243, Invalid=1089, Unknown=0, NotChecked=0, Total=1332 [2018-01-21 03:23:07,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2018-01-21 03:23:07,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 151. [2018-01-21 03:23:07,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2018-01-21 03:23:07,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 166 transitions. [2018-01-21 03:23:07,724 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 166 transitions. Word has length 140 [2018-01-21 03:23:07,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 03:23:07,725 INFO L432 AbstractCegarLoop]: Abstraction has 151 states and 166 transitions. [2018-01-21 03:23:07,725 INFO L433 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-01-21 03:23:07,725 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 166 transitions. [2018-01-21 03:23:07,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2018-01-21 03:23:07,728 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 03:23:07,728 INFO L322 BasicCegarLoop]: trace histogram [24, 18, 18, 18, 18, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 03:23:07,728 INFO L371 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 03:23:07,728 INFO L82 PathProgramCache]: Analyzing trace with hash -1936414061, now seen corresponding path program 6 times [2018-01-21 03:23:07,728 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 03:23:07,729 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:23:07,729 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-21 03:23:07,729 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:23:07,729 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 03:23:07,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 03:23:07,753 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 03:23:07,875 INFO L134 CoverageAnalysis]: Checked inductivity of 1158 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 1071 trivial. 0 not checked. [2018-01-21 03:23:07,875 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 03:23:07,875 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-21 03:23:07,876 INFO L183 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-01-21 03:23:07,876 INFO L434 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-01-21 03:23:07,876 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 03:23:07,876 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-21 03:23:07,881 INFO L101 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-01-21 03:23:07,881 INFO L280 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder MIX_INSIDE_OUTSIDE (IT: FPandBP) [2018-01-21 03:23:07,899 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-21 03:23:07,902 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-21 03:23:07,906 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-21 03:23:07,908 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-21 03:23:07,912 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-21 03:23:07,917 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-21 03:23:07,933 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-21 03:23:07,937 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-21 03:23:07,943 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-21 03:23:07,945 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-21 03:23:07,950 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-21 03:23:07,970 INFO L134 CoverageAnalysis]: Checked inductivity of 1158 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 1071 trivial. 0 not checked. [2018-01-21 03:23:07,970 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-21 03:23:08,082 INFO L134 CoverageAnalysis]: Checked inductivity of 1158 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 1071 trivial. 0 not checked. [2018-01-21 03:23:08,103 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 03:23:08,103 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 14 with cvc4 --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with cvc4 --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-01-21 03:23:08,107 INFO L101 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-01-21 03:23:08,107 INFO L280 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder MIX_INSIDE_OUTSIDE (IT: FPandBP) [2018-01-21 03:23:08,127 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-21 03:23:08,138 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-21 03:23:08,151 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-21 03:23:08,169 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-21 03:23:08,190 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-21 03:23:08,219 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-21 03:23:08,257 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-21 03:23:08,367 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-21 03:23:08,506 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-21 03:23:08,529 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-21 03:23:08,536 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-21 03:23:08,552 INFO L134 CoverageAnalysis]: Checked inductivity of 1158 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 1071 trivial. 0 not checked. [2018-01-21 03:23:08,553 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-21 03:23:08,592 INFO L134 CoverageAnalysis]: Checked inductivity of 1158 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 1071 trivial. 0 not checked. [2018-01-21 03:23:08,594 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-01-21 03:23:08,594 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9] total 17 [2018-01-21 03:23:08,594 INFO L247 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-01-21 03:23:08,595 INFO L409 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-01-21 03:23:08,595 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-01-21 03:23:08,595 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-01-21 03:23:08,595 INFO L87 Difference]: Start difference. First operand 151 states and 166 transitions. Second operand 10 states. [2018-01-21 03:23:08,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 03:23:08,669 INFO L93 Difference]: Finished difference Result 237 states and 264 transitions. [2018-01-21 03:23:08,669 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-01-21 03:23:08,669 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 176 [2018-01-21 03:23:08,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 03:23:08,672 INFO L225 Difference]: With dead ends: 237 [2018-01-21 03:23:08,672 INFO L226 Difference]: Without dead ends: 200 [2018-01-21 03:23:08,673 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 711 GetRequests, 696 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-01-21 03:23:08,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2018-01-21 03:23:08,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 160. [2018-01-21 03:23:08,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2018-01-21 03:23:08,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 177 transitions. [2018-01-21 03:23:08,687 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 177 transitions. Word has length 176 [2018-01-21 03:23:08,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 03:23:08,688 INFO L432 AbstractCegarLoop]: Abstraction has 160 states and 177 transitions. [2018-01-21 03:23:08,688 INFO L433 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-01-21 03:23:08,688 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 177 transitions. [2018-01-21 03:23:08,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2018-01-21 03:23:08,691 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 03:23:08,691 INFO L322 BasicCegarLoop]: trace histogram [29, 22, 22, 22, 22, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 03:23:08,691 INFO L371 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 03:23:08,691 INFO L82 PathProgramCache]: Analyzing trace with hash -984621276, now seen corresponding path program 7 times [2018-01-21 03:23:08,692 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 03:23:08,692 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:23:08,692 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-21 03:23:08,693 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:23:08,693 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 03:23:08,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 03:23:08,722 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 03:23:08,910 INFO L134 CoverageAnalysis]: Checked inductivity of 1708 backedges. 0 proven. 119 refuted. 0 times theorem prover too weak. 1589 trivial. 0 not checked. [2018-01-21 03:23:08,910 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 03:23:08,910 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-21 03:23:08,910 INFO L183 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-01-21 03:23:08,911 INFO L434 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-01-21 03:23:08,911 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 03:23:08,911 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-21 03:23:08,916 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 03:23:08,916 INFO L280 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-01-21 03:23:08,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 03:23:08,963 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-21 03:23:09,063 INFO L134 CoverageAnalysis]: Checked inductivity of 1708 backedges. 1134 proven. 38 refuted. 0 times theorem prover too weak. 536 trivial. 0 not checked. [2018-01-21 03:23:09,063 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-21 03:23:09,273 INFO L134 CoverageAnalysis]: Checked inductivity of 1708 backedges. 378 proven. 240 refuted. 0 times theorem prover too weak. 1090 trivial. 0 not checked. [2018-01-21 03:23:09,300 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 03:23:09,305 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 16 with cvc4 --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with cvc4 --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-01-21 03:23:09,309 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 03:23:09,309 INFO L280 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-01-21 03:23:09,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 03:23:09,397 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-21 03:23:09,435 INFO L134 CoverageAnalysis]: Checked inductivity of 1708 backedges. 1134 proven. 38 refuted. 0 times theorem prover too weak. 536 trivial. 0 not checked. [2018-01-21 03:23:09,435 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-21 03:23:09,663 INFO L134 CoverageAnalysis]: Checked inductivity of 1708 backedges. 378 proven. 240 refuted. 0 times theorem prover too weak. 1090 trivial. 0 not checked. [2018-01-21 03:23:09,665 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-01-21 03:23:09,665 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13, 13, 13, 13] total 26 [2018-01-21 03:23:09,665 INFO L247 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-01-21 03:23:09,665 INFO L409 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-01-21 03:23:09,666 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-01-21 03:23:09,666 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=522, Unknown=0, NotChecked=0, Total=650 [2018-01-21 03:23:09,666 INFO L87 Difference]: Start difference. First operand 160 states and 177 transitions. Second operand 21 states. [2018-01-21 03:23:10,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 03:23:10,106 INFO L93 Difference]: Finished difference Result 392 states and 439 transitions. [2018-01-21 03:23:10,107 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-01-21 03:23:10,107 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 207 [2018-01-21 03:23:10,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 03:23:10,109 INFO L225 Difference]: With dead ends: 392 [2018-01-21 03:23:10,109 INFO L226 Difference]: Without dead ends: 305 [2018-01-21 03:23:10,110 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 848 GetRequests, 798 SyntacticMatches, 14 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 445 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=270, Invalid=1136, Unknown=0, NotChecked=0, Total=1406 [2018-01-21 03:23:10,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2018-01-21 03:23:10,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 200. [2018-01-21 03:23:10,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2018-01-21 03:23:10,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 222 transitions. [2018-01-21 03:23:10,127 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 222 transitions. Word has length 207 [2018-01-21 03:23:10,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 03:23:10,127 INFO L432 AbstractCegarLoop]: Abstraction has 200 states and 222 transitions. [2018-01-21 03:23:10,128 INFO L433 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-01-21 03:23:10,128 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 222 transitions. [2018-01-21 03:23:10,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2018-01-21 03:23:10,131 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 03:23:10,131 INFO L322 BasicCegarLoop]: trace histogram [38, 30, 30, 30, 30, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 03:23:10,131 INFO L371 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 03:23:10,131 INFO L82 PathProgramCache]: Analyzing trace with hash 446009255, now seen corresponding path program 8 times [2018-01-21 03:23:10,132 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 03:23:10,132 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:23:10,132 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 03:23:10,133 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:23:10,133 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 03:23:10,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 03:23:10,165 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 03:23:10,346 INFO L134 CoverageAnalysis]: Checked inductivity of 2979 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 2823 trivial. 0 not checked. [2018-01-21 03:23:10,346 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 03:23:10,346 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-21 03:23:10,346 INFO L183 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-01-21 03:23:10,347 INFO L434 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-01-21 03:23:10,347 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 03:23:10,347 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-21 03:23:10,352 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-21 03:23:10,352 INFO L280 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-01-21 03:23:10,370 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-21 03:23:10,395 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-21 03:23:10,400 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-21 03:23:10,405 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-21 03:23:10,581 INFO L134 CoverageAnalysis]: Checked inductivity of 2979 backedges. 1895 proven. 60 refuted. 0 times theorem prover too weak. 1024 trivial. 0 not checked. [2018-01-21 03:23:10,581 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-21 03:23:10,831 INFO L134 CoverageAnalysis]: Checked inductivity of 2979 backedges. 623 proven. 360 refuted. 0 times theorem prover too weak. 1996 trivial. 0 not checked. [2018-01-21 03:23:10,852 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 03:23:10,852 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 18 with cvc4 --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with cvc4 --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-01-21 03:23:10,855 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-21 03:23:10,855 INFO L280 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-01-21 03:23:10,877 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-21 03:23:10,927 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-21 03:23:10,964 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-21 03:23:10,972 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-21 03:23:11,018 INFO L134 CoverageAnalysis]: Checked inductivity of 2979 backedges. 1895 proven. 60 refuted. 0 times theorem prover too weak. 1024 trivial. 0 not checked. [2018-01-21 03:23:11,019 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-21 03:23:11,210 INFO L134 CoverageAnalysis]: Checked inductivity of 2979 backedges. 623 proven. 360 refuted. 0 times theorem prover too weak. 1996 trivial. 0 not checked. [2018-01-21 03:23:11,212 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-01-21 03:23:11,212 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15, 15, 15, 15] total 30 [2018-01-21 03:23:11,213 INFO L247 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-01-21 03:23:11,213 INFO L409 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-01-21 03:23:11,214 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-01-21 03:23:11,214 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=704, Unknown=0, NotChecked=0, Total=870 [2018-01-21 03:23:11,214 INFO L87 Difference]: Start difference. First operand 200 states and 222 transitions. Second operand 24 states. [2018-01-21 03:23:11,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 03:23:11,701 INFO L93 Difference]: Finished difference Result 489 states and 547 transitions. [2018-01-21 03:23:11,701 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-01-21 03:23:11,702 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 258 [2018-01-21 03:23:11,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 03:23:11,704 INFO L225 Difference]: With dead ends: 489 [2018-01-21 03:23:11,704 INFO L226 Difference]: Without dead ends: 390 [2018-01-21 03:23:11,705 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 1055 GetRequests, 997 SyntacticMatches, 16 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 615 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=352, Invalid=1540, Unknown=0, NotChecked=0, Total=1892 [2018-01-21 03:23:11,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2018-01-21 03:23:11,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 245. [2018-01-21 03:23:11,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 245 states. [2018-01-21 03:23:11,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 273 transitions. [2018-01-21 03:23:11,725 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 273 transitions. Word has length 258 [2018-01-21 03:23:11,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 03:23:11,725 INFO L432 AbstractCegarLoop]: Abstraction has 245 states and 273 transitions. [2018-01-21 03:23:11,725 INFO L433 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-01-21 03:23:11,725 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 273 transitions. [2018-01-21 03:23:11,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 315 [2018-01-21 03:23:11,730 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 03:23:11,730 INFO L322 BasicCegarLoop]: trace histogram [48, 39, 39, 39, 39, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 03:23:11,730 INFO L371 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 03:23:11,731 INFO L82 PathProgramCache]: Analyzing trace with hash 1567268592, now seen corresponding path program 9 times [2018-01-21 03:23:11,731 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 03:23:11,731 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:23:11,732 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-21 03:23:11,732 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:23:11,732 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 03:23:11,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 03:23:11,772 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 03:23:12,058 INFO L134 CoverageAnalysis]: Checked inductivity of 4821 backedges. 0 proven. 198 refuted. 0 times theorem prover too weak. 4623 trivial. 0 not checked. [2018-01-21 03:23:12,058 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 03:23:12,058 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-21 03:23:12,058 INFO L183 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-01-21 03:23:12,058 INFO L434 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-01-21 03:23:12,058 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 03:23:12,059 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-21 03:23:12,064 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-21 03:23:12,065 INFO L280 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-01-21 03:23:12,090 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-21 03:23:12,093 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-21 03:23:12,097 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-21 03:23:12,102 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-21 03:23:12,107 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-21 03:23:12,122 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-21 03:23:12,137 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-21 03:23:12,147 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-21 03:23:12,149 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-21 03:23:12,164 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-21 03:23:12,480 INFO L134 CoverageAnalysis]: Checked inductivity of 4821 backedges. 1226 proven. 87 refuted. 0 times theorem prover too weak. 3508 trivial. 0 not checked. [2018-01-21 03:23:12,480 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-21 03:23:12,953 INFO L134 CoverageAnalysis]: Checked inductivity of 4821 backedges. 1226 proven. 87 refuted. 0 times theorem prover too weak. 3508 trivial. 0 not checked. [2018-01-21 03:23:12,974 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 03:23:12,974 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 20 with cvc4 --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with cvc4 --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-01-21 03:23:12,977 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-21 03:23:12,977 INFO L280 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-01-21 03:23:13,004 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-21 03:23:13,018 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-21 03:23:13,047 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-21 03:23:13,074 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-21 03:23:13,133 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-21 03:23:13,259 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-21 03:23:13,529 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-21 03:23:14,021 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-21 03:23:14,053 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-21 03:23:14,065 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-21 03:23:14,135 INFO L134 CoverageAnalysis]: Checked inductivity of 4821 backedges. 1226 proven. 87 refuted. 0 times theorem prover too weak. 3508 trivial. 0 not checked. [2018-01-21 03:23:14,136 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-21 03:23:14,503 INFO L134 CoverageAnalysis]: Checked inductivity of 4821 backedges. 1226 proven. 87 refuted. 0 times theorem prover too weak. 3508 trivial. 0 not checked. [2018-01-21 03:23:14,506 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-01-21 03:23:14,506 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12, 12, 12] total 30 [2018-01-21 03:23:14,506 INFO L247 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-01-21 03:23:14,507 INFO L409 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-01-21 03:23:14,507 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-01-21 03:23:14,508 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=229, Invalid=641, Unknown=0, NotChecked=0, Total=870 [2018-01-21 03:23:14,508 INFO L87 Difference]: Start difference. First operand 245 states and 273 transitions. Second operand 20 states. [2018-01-21 03:23:15,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 03:23:15,357 INFO L93 Difference]: Finished difference Result 564 states and 641 transitions. [2018-01-21 03:23:15,357 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-01-21 03:23:15,357 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 314 [2018-01-21 03:23:15,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 03:23:15,360 INFO L225 Difference]: With dead ends: 564 [2018-01-21 03:23:15,360 INFO L226 Difference]: Without dead ends: 515 [2018-01-21 03:23:15,361 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 1273 GetRequests, 1236 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=355, Invalid=977, Unknown=0, NotChecked=0, Total=1332 [2018-01-21 03:23:15,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2018-01-21 03:23:15,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 303. [2018-01-21 03:23:15,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 303 states. [2018-01-21 03:23:15,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 343 transitions. [2018-01-21 03:23:15,383 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 343 transitions. Word has length 314 [2018-01-21 03:23:15,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 03:23:15,384 INFO L432 AbstractCegarLoop]: Abstraction has 303 states and 343 transitions. [2018-01-21 03:23:15,384 INFO L433 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-01-21 03:23:15,384 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 343 transitions. [2018-01-21 03:23:15,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 376 [2018-01-21 03:23:15,386 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 03:23:15,386 INFO L322 BasicCegarLoop]: trace histogram [59, 49, 49, 49, 49, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 03:23:15,386 INFO L371 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 03:23:15,386 INFO L82 PathProgramCache]: Analyzing trace with hash -1827967461, now seen corresponding path program 10 times [2018-01-21 03:23:15,386 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 03:23:15,387 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:23:15,387 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-21 03:23:15,387 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:23:15,387 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 03:23:15,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 03:23:15,419 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 03:23:15,785 INFO L134 CoverageAnalysis]: Checked inductivity of 7375 backedges. 0 proven. 245 refuted. 0 times theorem prover too weak. 7130 trivial. 0 not checked. [2018-01-21 03:23:15,785 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 03:23:15,785 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-21 03:23:15,786 INFO L183 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-01-21 03:23:15,786 INFO L434 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-01-21 03:23:15,786 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 03:23:15,786 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-21 03:23:15,791 INFO L101 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-01-21 03:23:15,791 INFO L280 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-01-21 03:23:15,862 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-21 03:23:15,867 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-21 03:23:16,151 INFO L134 CoverageAnalysis]: Checked inductivity of 7375 backedges. 4311 proven. 119 refuted. 0 times theorem prover too weak. 2945 trivial. 0 not checked. [2018-01-21 03:23:16,152 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-21 03:23:16,553 INFO L134 CoverageAnalysis]: Checked inductivity of 7375 backedges. 1401 proven. 675 refuted. 0 times theorem prover too weak. 5299 trivial. 0 not checked. [2018-01-21 03:23:16,588 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 03:23:16,588 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 22 with cvc4 --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with cvc4 --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-01-21 03:23:16,593 INFO L101 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-01-21 03:23:16,594 INFO L280 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-01-21 03:23:16,744 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-21 03:23:16,755 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-21 03:23:16,870 INFO L134 CoverageAnalysis]: Checked inductivity of 7375 backedges. 4311 proven. 119 refuted. 0 times theorem prover too weak. 2945 trivial. 0 not checked. [2018-01-21 03:23:16,870 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-21 03:23:17,223 INFO L134 CoverageAnalysis]: Checked inductivity of 7375 backedges. 1401 proven. 675 refuted. 0 times theorem prover too weak. 5299 trivial. 0 not checked. [2018-01-21 03:23:17,228 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-01-21 03:23:17,229 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19, 19, 19, 19] total 38 [2018-01-21 03:23:17,229 INFO L247 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-01-21 03:23:17,230 INFO L409 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-01-21 03:23:17,231 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-01-21 03:23:17,231 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=1149, Unknown=0, NotChecked=0, Total=1406 [2018-01-21 03:23:17,231 INFO L87 Difference]: Start difference. First operand 303 states and 343 transitions. Second operand 30 states. [2018-01-21 03:23:18,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 03:23:18,511 INFO L93 Difference]: Finished difference Result 751 states and 858 transitions. [2018-01-21 03:23:18,511 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-01-21 03:23:18,511 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 375 [2018-01-21 03:23:18,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 03:23:18,514 INFO L225 Difference]: With dead ends: 751 [2018-01-21 03:23:18,514 INFO L226 Difference]: Without dead ends: 618 [2018-01-21 03:23:18,516 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 1529 GetRequests, 1455 SyntacticMatches, 20 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1036 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=549, Invalid=2531, Unknown=0, NotChecked=0, Total=3080 [2018-01-21 03:23:18,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 618 states. [2018-01-21 03:23:18,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 618 to 358. [2018-01-21 03:23:18,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 358 states. [2018-01-21 03:23:18,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 403 transitions. [2018-01-21 03:23:18,539 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 403 transitions. Word has length 375 [2018-01-21 03:23:18,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 03:23:18,540 INFO L432 AbstractCegarLoop]: Abstraction has 358 states and 403 transitions. [2018-01-21 03:23:18,540 INFO L433 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-01-21 03:23:18,540 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 403 transitions. [2018-01-21 03:23:18,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 437 [2018-01-21 03:23:18,542 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 03:23:18,543 INFO L322 BasicCegarLoop]: trace histogram [70, 59, 59, 59, 59, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 03:23:18,543 INFO L371 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 03:23:18,543 INFO L82 PathProgramCache]: Analyzing trace with hash -940109232, now seen corresponding path program 11 times [2018-01-21 03:23:18,543 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 03:23:18,544 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:23:18,544 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-21 03:23:18,544 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:23:18,544 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 03:23:18,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 03:23:18,583 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 03:23:19,033 INFO L134 CoverageAnalysis]: Checked inductivity of 10480 backedges. 0 proven. 297 refuted. 0 times theorem prover too weak. 10183 trivial. 0 not checked. [2018-01-21 03:23:19,033 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 03:23:19,033 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-21 03:23:19,033 INFO L183 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-01-21 03:23:19,034 INFO L434 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-01-21 03:23:19,034 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 03:23:19,034 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-21 03:23:19,054 INFO L101 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-01-21 03:23:19,054 INFO L280 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder INSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-01-21 03:23:19,082 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-21 03:23:19,098 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-21 03:23:19,116 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-21 03:23:19,134 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-21 03:23:19,151 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-21 03:23:19,168 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-21 03:23:19,185 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-21 03:23:19,201 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-21 03:23:19,203 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-21 03:23:19,209 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-21 03:23:19,535 INFO L134 CoverageAnalysis]: Checked inductivity of 10480 backedges. 6200 proven. 517 refuted. 0 times theorem prover too weak. 3763 trivial. 0 not checked. [2018-01-21 03:23:19,535 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-21 03:23:20,305 INFO L134 CoverageAnalysis]: Checked inductivity of 10480 backedges. 1065 proven. 2348 refuted. 0 times theorem prover too weak. 7067 trivial. 0 not checked. [2018-01-21 03:23:20,325 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 03:23:20,325 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 24 with cvc4 --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with cvc4 --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-01-21 03:23:20,328 INFO L101 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-01-21 03:23:20,328 INFO L280 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder INSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-01-21 03:23:20,358 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-21 03:23:20,368 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-21 03:23:20,391 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-21 03:23:20,431 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-21 03:23:20,565 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-21 03:23:20,643 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-21 03:23:20,742 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-21 03:23:20,870 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-21 03:23:20,908 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-21 03:23:20,918 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-21 03:23:21,081 INFO L134 CoverageAnalysis]: Checked inductivity of 10480 backedges. 6116 proven. 427 refuted. 0 times theorem prover too weak. 3937 trivial. 0 not checked. [2018-01-21 03:23:21,081 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-21 03:23:21,961 INFO L134 CoverageAnalysis]: Checked inductivity of 10480 backedges. 971 proven. 1932 refuted. 0 times theorem prover too weak. 7577 trivial. 0 not checked. [2018-01-21 03:23:21,964 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-01-21 03:23:21,965 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 19, 19, 19, 19] total 47 [2018-01-21 03:23:21,965 INFO L247 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-01-21 03:23:21,966 INFO L409 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-01-21 03:23:21,966 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-01-21 03:23:21,967 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=291, Invalid=1871, Unknown=0, NotChecked=0, Total=2162 [2018-01-21 03:23:21,967 INFO L87 Difference]: Start difference. First operand 358 states and 403 transitions. Second operand 31 states. [2018-01-21 03:23:24,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 03:23:24,337 INFO L93 Difference]: Finished difference Result 835 states and 939 transitions. [2018-01-21 03:23:24,338 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-01-21 03:23:24,338 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 436 [2018-01-21 03:23:24,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 03:23:24,341 INFO L225 Difference]: With dead ends: 835 [2018-01-21 03:23:24,341 INFO L226 Difference]: Without dead ends: 469 [2018-01-21 03:23:24,344 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 1785 GetRequests, 1693 SyntacticMatches, 18 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1741 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=906, Invalid=4794, Unknown=0, NotChecked=0, Total=5700 [2018-01-21 03:23:24,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2018-01-21 03:23:24,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 364. [2018-01-21 03:23:24,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 364 states. [2018-01-21 03:23:24,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 400 transitions. [2018-01-21 03:23:24,370 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 400 transitions. Word has length 436 [2018-01-21 03:23:24,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 03:23:24,370 INFO L432 AbstractCegarLoop]: Abstraction has 364 states and 400 transitions. [2018-01-21 03:23:24,370 INFO L433 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-01-21 03:23:24,370 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 400 transitions. [2018-01-21 03:23:24,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 493 [2018-01-21 03:23:24,374 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 03:23:24,374 INFO L322 BasicCegarLoop]: trace histogram [80, 68, 68, 68, 68, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 03:23:24,374 INFO L371 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 03:23:24,374 INFO L82 PathProgramCache]: Analyzing trace with hash 270709555, now seen corresponding path program 12 times [2018-01-21 03:23:24,374 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 03:23:24,375 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:23:24,375 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-21 03:23:24,375 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:23:24,376 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 03:23:24,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 03:23:24,418 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 03:23:25,315 INFO L134 CoverageAnalysis]: Checked inductivity of 13772 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 13418 trivial. 0 not checked. [2018-01-21 03:23:25,316 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 03:23:25,316 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-21 03:23:25,316 INFO L183 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-01-21 03:23:25,316 INFO L434 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-01-21 03:23:25,316 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 03:23:25,316 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-21 03:23:25,332 INFO L101 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-01-21 03:23:25,332 INFO L280 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder MIX_INSIDE_OUTSIDE (IT: FPandBP) [2018-01-21 03:23:25,356 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-21 03:23:25,360 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-21 03:23:25,363 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-21 03:23:25,368 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-21 03:23:25,373 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-21 03:23:25,379 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-21 03:23:25,385 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-21 03:23:25,393 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-21 03:23:25,402 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-21 03:23:25,410 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-21 03:23:25,420 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-21 03:23:25,430 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-21 03:23:25,441 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-21 03:23:25,452 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-21 03:23:25,466 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-21 03:23:25,477 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-21 03:23:25,489 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-21 03:23:25,502 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-21 03:23:25,515 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-21 03:23:25,517 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-21 03:23:25,523 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-21 03:23:25,743 INFO L134 CoverageAnalysis]: Checked inductivity of 13772 backedges. 2797 proven. 156 refuted. 0 times theorem prover too weak. 10819 trivial. 0 not checked. [2018-01-21 03:23:25,743 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-21 03:23:26,266 INFO L134 CoverageAnalysis]: Checked inductivity of 13772 backedges. 2797 proven. 156 refuted. 0 times theorem prover too weak. 10819 trivial. 0 not checked. [2018-01-21 03:23:26,287 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 03:23:26,287 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 26 with cvc4 --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with cvc4 --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-01-21 03:23:26,291 INFO L101 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-01-21 03:23:26,291 INFO L280 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder MIX_INSIDE_OUTSIDE (IT: FPandBP) [2018-01-21 03:23:26,330 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-21 03:23:26,343 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-21 03:23:26,378 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-21 03:23:26,449 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-21 03:23:26,566 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-21 03:23:26,898 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-21 03:23:28,098 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-21 03:23:32,563 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-21 03:23:44,613 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown