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.epf -i ../../../trunk/examples/svcomp/ldv-memsafety/ArraysWithLenghtAtDeclaration_false-valid-deref-read.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-2f49842 [2018-01-20 23:47:12,463 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-20 23:47:12,465 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-20 23:47:12,480 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-20 23:47:12,480 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-20 23:47:12,481 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-20 23:47:12,482 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-20 23:47:12,484 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-20 23:47:12,486 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-20 23:47:12,487 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-20 23:47:12,487 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-01-20 23:47:12,488 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-01-20 23:47:12,489 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-01-20 23:47:12,490 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-01-20 23:47:12,491 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-01-20 23:47:12,493 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-01-20 23:47:12,495 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-01-20 23:47:12,497 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-01-20 23:47:12,499 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-01-20 23:47:12,500 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-01-20 23:47:12,502 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-01-20 23:47:12,507 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-01-20 23:47:12,508 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-01-20 23:47:12,508 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.epf [2018-01-20 23:47:12,518 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-20 23:47:12,518 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-20 23:47:12,519 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-20 23:47:12,519 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-20 23:47:12,519 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-20 23:47:12,519 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-20 23:47:12,520 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-20 23:47:12,520 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-20 23:47:12,520 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-20 23:47:12,521 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-20 23:47:12,521 INFO L133 SettingsManager]: * Check allocation purity=true [2018-01-20 23:47:12,521 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-20 23:47:12,521 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-20 23:47:12,521 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-20 23:47:12,522 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-01-20 23:47:12,522 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-20 23:47:12,522 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-01-20 23:47:12,522 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-20 23:47:12,522 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-01-20 23:47:12,523 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-01-20 23:47:12,523 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-20 23:47:12,523 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-01-20 23:47:12,523 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-20 23:47:12,523 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-20 23:47:12,524 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-20 23:47:12,524 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-20 23:47:12,524 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-20 23:47:12,524 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-20 23:47:12,524 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-20 23:47:12,525 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-20 23:47:12,525 INFO L133 SettingsManager]: * Stop after first violation was found=false [2018-01-20 23:47:12,525 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-01-20 23:47:12,525 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-20 23:47:12,525 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-20 23:47:12,526 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-20 23:47:12,526 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-01-20 23:47:12,527 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-20 23:47:12,527 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-20 23:47:12,560 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-20 23:47:12,572 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-20 23:47:12,576 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-20 23:47:12,578 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-20 23:47:12,578 INFO L276 PluginConnector]: CDTParser initialized [2018-01-20 23:47:12,579 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-memsafety/ArraysWithLenghtAtDeclaration_false-valid-deref-read.c [2018-01-20 23:47:12,720 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-20 23:47:12,724 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-20 23:47:12,725 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-20 23:47:12,725 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-20 23:47:12,729 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-20 23:47:12,730 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.01 11:47:12" (1/1) ... [2018-01-20 23:47:12,732 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@23155f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 11:47:12, skipping insertion in model container [2018-01-20 23:47:12,733 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.01 11:47:12" (1/1) ... [2018-01-20 23:47:12,745 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-20 23:47:12,758 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-20 23:47:12,865 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-20 23:47:12,881 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-20 23:47:12,886 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 11:47:12 WrapperNode [2018-01-20 23:47:12,887 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-20 23:47:12,887 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-20 23:47:12,887 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-20 23:47:12,887 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-20 23:47:12,898 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 11:47:12" (1/1) ... [2018-01-20 23:47:12,898 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 11:47:12" (1/1) ... [2018-01-20 23:47:12,906 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 11:47:12" (1/1) ... [2018-01-20 23:47:12,906 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 11:47:12" (1/1) ... [2018-01-20 23:47:12,909 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 11:47:12" (1/1) ... [2018-01-20 23:47:12,912 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 11:47:12" (1/1) ... [2018-01-20 23:47:12,913 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 11:47:12" (1/1) ... [2018-01-20 23:47:12,915 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-20 23:47:12,915 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-20 23:47:12,915 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-20 23:47:12,915 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-20 23:47:12,916 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 11:47:12" (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 [2018-01-20 23:47:12,961 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-20 23:47:12,961 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-20 23:47:12,961 INFO L136 BoogieDeclarations]: Found implementation of procedure foo [2018-01-20 23:47:12,961 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-20 23:47:12,961 INFO L128 BoogieDeclarations]: Found specification of procedure write~int [2018-01-20 23:47:12,962 INFO L128 BoogieDeclarations]: Found specification of procedure read~int [2018-01-20 23:47:12,962 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-01-20 23:47:12,962 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-01-20 23:47:12,962 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-01-20 23:47:12,962 INFO L128 BoogieDeclarations]: Found specification of procedure foo [2018-01-20 23:47:12,962 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-20 23:47:12,962 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-20 23:47:12,962 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-20 23:47:13,113 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-20 23:47:13,114 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.01 11:47:13 BoogieIcfgContainer [2018-01-20 23:47:13,114 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-20 23:47:13,115 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-01-20 23:47:13,115 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-01-20 23:47:13,117 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-01-20 23:47:13,117 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.01 11:47:12" (1/3) ... [2018-01-20 23:47:13,118 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@418b77a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.01 11:47:13, skipping insertion in model container [2018-01-20 23:47:13,118 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 11:47:12" (2/3) ... [2018-01-20 23:47:13,118 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@418b77a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.01 11:47:13, skipping insertion in model container [2018-01-20 23:47:13,118 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.01 11:47:13" (3/3) ... [2018-01-20 23:47:13,119 INFO L105 eAbstractionObserver]: Analyzing ICFG ArraysWithLenghtAtDeclaration_false-valid-deref-read.c [2018-01-20 23:47:13,126 INFO L130 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-01-20 23:47:13,131 INFO L142 ceAbstractionStarter]: Appying trace abstraction to program that has 4 error locations. [2018-01-20 23:47:13,175 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-20 23:47:13,175 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-20 23:47:13,176 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-20 23:47:13,176 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-20 23:47:13,176 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-20 23:47:13,176 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-20 23:47:13,176 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-20 23:47:13,176 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.initErr0EnsuresViolation======== [2018-01-20 23:47:13,177 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-20 23:47:13,190 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states. [2018-01-20 23:47:13,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-01-20 23:47:13,195 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 23:47:13,196 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-01-20 23:47:13,196 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.initErr0EnsuresViolation]=== [2018-01-20 23:47:13,201 INFO L82 PathProgramCache]: Analyzing trace with hash 100907, now seen corresponding path program 1 times [2018-01-20 23:47:13,204 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-20 23:47:13,256 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 23:47:13,256 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 23:47:13,256 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 23:47:13,256 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-20 23:47:13,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-20 23:47:13,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-20 23:47:13,307 INFO L381 BasicCegarLoop]: Counterexample might be feasible [2018-01-20 23:47:13,312 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-20 23:47:13,318 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-20 23:47:13,318 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-20 23:47:13,318 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-20 23:47:13,318 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-20 23:47:13,318 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-20 23:47:13,318 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-20 23:47:13,318 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-20 23:47:13,318 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooErr0EnsuresViolation======== [2018-01-20 23:47:13,318 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-20 23:47:13,320 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states. [2018-01-20 23:47:13,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-01-20 23:47:13,321 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 23:47:13,321 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 23:47:13,321 INFO L371 AbstractCegarLoop]: === Iteration 1 === [fooErr0EnsuresViolation]=== [2018-01-20 23:47:13,321 INFO L82 PathProgramCache]: Analyzing trace with hash 352444009, now seen corresponding path program 1 times [2018-01-20 23:47:13,321 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-20 23:47:13,322 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 23:47:13,322 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 23:47:13,322 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 23:47:13,322 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-20 23:47:13,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 23:47:13,344 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 23:47:13,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 23:47:13,376 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-20 23:47:13,376 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-20 23:47:13,376 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-20 23:47:13,378 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-20 23:47:13,389 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-20 23:47:13,390 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-20 23:47:13,391 INFO L87 Difference]: Start difference. First operand 41 states. Second operand 2 states. [2018-01-20 23:47:13,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 23:47:13,411 INFO L93 Difference]: Finished difference Result 72 states and 86 transitions. [2018-01-20 23:47:13,412 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-20 23:47:13,413 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 15 [2018-01-20 23:47:13,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 23:47:13,421 INFO L225 Difference]: With dead ends: 72 [2018-01-20 23:47:13,422 INFO L226 Difference]: Without dead ends: 0 [2018-01-20 23:47:13,425 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 [2018-01-20 23:47:13,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-01-20 23:47:13,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-01-20 23:47:13,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-01-20 23:47:13,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-01-20 23:47:13,521 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 15 [2018-01-20 23:47:13,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 23:47:13,521 INFO L432 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-01-20 23:47:13,522 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-20 23:47:13,522 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-01-20 23:47:13,522 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-01-20 23:47:13,524 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-20 23:47:13,524 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-20 23:47:13,524 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-20 23:47:13,524 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-20 23:47:13,524 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-20 23:47:13,524 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-20 23:47:13,524 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-20 23:47:13,524 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.startErr0EnsuresViolation======== [2018-01-20 23:47:13,525 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-20 23:47:13,526 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states. [2018-01-20 23:47:13,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-01-20 23:47:13,527 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 23:47:13,527 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 23:47:13,527 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 23:47:13,527 INFO L82 PathProgramCache]: Analyzing trace with hash -1481761889, now seen corresponding path program 1 times [2018-01-20 23:47:13,527 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-20 23:47:13,528 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 23:47:13,528 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 23:47:13,528 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 23:47:13,529 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-20 23:47:13,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 23:47:13,536 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 23:47:13,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 23:47:13,546 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-20 23:47:13,546 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-20 23:47:13,547 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-20 23:47:13,547 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-20 23:47:13,547 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-20 23:47:13,547 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-20 23:47:13,547 INFO L87 Difference]: Start difference. First operand 41 states. Second operand 2 states. [2018-01-20 23:47:13,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 23:47:13,551 INFO L93 Difference]: Finished difference Result 72 states and 86 transitions. [2018-01-20 23:47:13,551 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-20 23:47:13,552 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 17 [2018-01-20 23:47:13,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 23:47:13,553 INFO L225 Difference]: With dead ends: 72 [2018-01-20 23:47:13,553 INFO L226 Difference]: Without dead ends: 37 [2018-01-20 23:47:13,554 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 [2018-01-20 23:47:13,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-01-20 23:47:13,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-01-20 23:47:13,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-01-20 23:47:13,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 40 transitions. [2018-01-20 23:47:13,565 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 40 transitions. Word has length 17 [2018-01-20 23:47:13,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 23:47:13,565 INFO L432 AbstractCegarLoop]: Abstraction has 37 states and 40 transitions. [2018-01-20 23:47:13,565 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-20 23:47:13,566 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 40 transitions. [2018-01-20 23:47:13,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-01-20 23:47:13,566 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 23:47:13,566 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 23:47:13,566 INFO L371 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 23:47:13,567 INFO L82 PathProgramCache]: Analyzing trace with hash 499012364, now seen corresponding path program 1 times [2018-01-20 23:47:13,567 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-20 23:47:13,568 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 23:47:13,568 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 23:47:13,568 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 23:47:13,568 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-20 23:47:13,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 23:47:13,578 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 23:47:13,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 23:47:13,609 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-20 23:47:13,610 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-20 23:47:13,610 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-20 23:47:13,611 INFO L409 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-01-20 23:47:13,612 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-01-20 23:47:13,612 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-01-20 23:47:13,612 INFO L87 Difference]: Start difference. First operand 37 states and 40 transitions. Second operand 3 states. [2018-01-20 23:47:13,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 23:47:13,664 INFO L93 Difference]: Finished difference Result 66 states and 74 transitions. [2018-01-20 23:47:13,665 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-01-20 23:47:13,665 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2018-01-20 23:47:13,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 23:47:13,667 INFO L225 Difference]: With dead ends: 66 [2018-01-20 23:47:13,668 INFO L226 Difference]: Without dead ends: 51 [2018-01-20 23:47:13,668 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 [2018-01-20 23:47:13,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-01-20 23:47:13,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 41. [2018-01-20 23:47:13,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-01-20 23:47:13,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions. [2018-01-20 23:47:13,680 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 19 [2018-01-20 23:47:13,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 23:47:13,680 INFO L432 AbstractCegarLoop]: Abstraction has 41 states and 44 transitions. [2018-01-20 23:47:13,680 INFO L433 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-01-20 23:47:13,680 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2018-01-20 23:47:13,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-01-20 23:47:13,681 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 23:47:13,682 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] [2018-01-20 23:47:13,682 INFO L371 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 23:47:13,682 INFO L82 PathProgramCache]: Analyzing trace with hash 1504830404, now seen corresponding path program 1 times [2018-01-20 23:47:13,682 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-20 23:47:13,683 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 23:47:13,684 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 23:47:13,684 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 23:47:13,684 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-20 23:47:13,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 23:47:13,701 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 23:47:13,865 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 23:47:13,865 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-20 23:47:13,865 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-01-20 23:47:13,866 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-20 23:47:13,866 INFO L409 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-01-20 23:47:13,866 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-01-20 23:47:13,867 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-01-20 23:47:13,867 INFO L87 Difference]: Start difference. First operand 41 states and 44 transitions. Second operand 6 states. [2018-01-20 23:47:13,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 23:47:13,994 INFO L93 Difference]: Finished difference Result 90 states and 100 transitions. [2018-01-20 23:47:13,994 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-20 23:47:13,994 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 31 [2018-01-20 23:47:13,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 23:47:13,996 INFO L225 Difference]: With dead ends: 90 [2018-01-20 23:47:13,996 INFO L226 Difference]: Without dead ends: 59 [2018-01-20 23:47:13,996 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2018-01-20 23:47:13,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-01-20 23:47:14,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 47. [2018-01-20 23:47:14,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-01-20 23:47:14,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 52 transitions. [2018-01-20 23:47:14,005 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 52 transitions. Word has length 31 [2018-01-20 23:47:14,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 23:47:14,005 INFO L432 AbstractCegarLoop]: Abstraction has 47 states and 52 transitions. [2018-01-20 23:47:14,005 INFO L433 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-01-20 23:47:14,005 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 52 transitions. [2018-01-20 23:47:14,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-01-20 23:47:14,007 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 23:47:14,008 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] [2018-01-20 23:47:14,008 INFO L371 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 23:47:14,008 INFO L82 PathProgramCache]: Analyzing trace with hash -151955344, now seen corresponding path program 1 times [2018-01-20 23:47:14,008 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-20 23:47:14,010 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 23:47:14,010 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 23:47:14,010 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 23:47:14,010 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-20 23:47:14,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 23:47:14,026 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 23:47:14,151 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 23:47:14,152 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 23:47:14,153 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-20 23:47:14,154 INFO L199 CegarAbsIntRunner]: Running AI on error trace of length 37 with the following transitions: [2018-01-20 23:47:14,155 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] [2018-01-20 23:47:14,218 INFO L147 AbstractInterpreter]: Using domain VPDomain [2018-01-20 23:47:14,218 INFO L101 FixpointEngine]: Starting fixpoint engine with domain VPDomain (maxUnwinding=3, maxParallelStates=2) [2018-01-20 23:47:15,566 INFO L259 AbstractInterpreter]: Some error location(s) were reachable [2018-01-20 23:47:15,568 INFO L268 AbstractInterpreter]: Visited 34 different actions 115 times. Merged at 22 different actions 56 times. Never widened. Found 9 fixpoints after 4 different actions. Largest state had 21 variables. [2018-01-20 23:47:15,622 INFO L434 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-01-20 23:47:15,622 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 23:47:15,623 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 [2018-01-20 23:47:15,636 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 23:47:15,636 INFO L280 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-01-20 23:47:15,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 23:47:15,666 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 23:47:15,785 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 23:47:15,785 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-20 23:47:15,972 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 23:47:16,008 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 23:47:16,008 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 3 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 3 with cvc4 --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-01-20 23:47:16,015 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 23:47:16,016 INFO L280 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-01-20 23:47:16,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 23:47:16,048 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 23:47:16,104 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-01-20 23:47:16,104 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-20 23:47:16,184 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-01-20 23:47:16,190 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-01-20 23:47:16,191 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 4, 4] total 16 [2018-01-20 23:47:16,191 INFO L247 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-01-20 23:47:16,192 INFO L409 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-01-20 23:47:16,193 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-01-20 23:47:16,194 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2018-01-20 23:47:16,194 INFO L87 Difference]: Start difference. First operand 47 states and 52 transitions. Second operand 10 states. [2018-01-20 23:47:16,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 23:47:16,485 INFO L93 Difference]: Finished difference Result 103 states and 115 transitions. [2018-01-20 23:47:16,485 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-01-20 23:47:16,485 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 36 [2018-01-20 23:47:16,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 23:47:16,487 INFO L225 Difference]: With dead ends: 103 [2018-01-20 23:47:16,487 INFO L226 Difference]: Without dead ends: 61 [2018-01-20 23:47:16,488 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 131 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2018-01-20 23:47:16,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-01-20 23:47:16,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 48. [2018-01-20 23:47:16,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-01-20 23:47:16,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 51 transitions. [2018-01-20 23:47:16,495 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 51 transitions. Word has length 36 [2018-01-20 23:47:16,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 23:47:16,496 INFO L432 AbstractCegarLoop]: Abstraction has 48 states and 51 transitions. [2018-01-20 23:47:16,496 INFO L433 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-01-20 23:47:16,496 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 51 transitions. [2018-01-20 23:47:16,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-01-20 23:47:16,497 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 23:47:16,498 INFO L322 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 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] [2018-01-20 23:47:16,498 INFO L371 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 23:47:16,498 INFO L82 PathProgramCache]: Analyzing trace with hash -524554428, now seen corresponding path program 2 times [2018-01-20 23:47:16,498 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-20 23:47:16,499 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 23:47:16,499 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 23:47:16,499 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 23:47:16,500 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-20 23:47:16,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 23:47:16,515 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 23:47:16,550 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-01-20 23:47:16,550 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 23:47:16,550 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-20 23:47:16,550 INFO L183 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-01-20 23:47:16,550 INFO L434 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-01-20 23:47:16,550 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 23:47:16,550 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-20 23:47:16,569 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-20 23:47:16,570 INFO L280 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-01-20 23:47:16,580 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 23:47:16,590 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 23:47:16,603 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 23:47:16,606 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 23:47:16,627 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-01-20 23:47:16,627 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-20 23:47:16,654 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-01-20 23:47:16,685 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 23:47:16,686 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 5 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 5 with cvc4 --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-01-20 23:47:16,691 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-20 23:47:16,692 INFO L280 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-01-20 23:47:16,703 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 23:47:16,714 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 23:47:16,723 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 23:47:16,727 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 23:47:16,732 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-01-20 23:47:16,732 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-20 23:47:16,760 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-01-20 23:47:16,761 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-01-20 23:47:16,762 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4] total 7 [2018-01-20 23:47:16,762 INFO L247 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-01-20 23:47:16,762 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-20 23:47:16,762 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-20 23:47:16,762 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-01-20 23:47:16,762 INFO L87 Difference]: Start difference. First operand 48 states and 51 transitions. Second operand 5 states. [2018-01-20 23:47:16,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 23:47:16,864 INFO L93 Difference]: Finished difference Result 89 states and 99 transitions. [2018-01-20 23:47:16,864 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-01-20 23:47:16,865 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 41 [2018-01-20 23:47:16,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 23:47:16,866 INFO L225 Difference]: With dead ends: 89 [2018-01-20 23:47:16,866 INFO L226 Difference]: Without dead ends: 72 [2018-01-20 23:47:16,867 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-01-20 23:47:16,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2018-01-20 23:47:16,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 57. [2018-01-20 23:47:16,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-01-20 23:47:16,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 62 transitions. [2018-01-20 23:47:16,874 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 62 transitions. Word has length 41 [2018-01-20 23:47:16,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 23:47:16,874 INFO L432 AbstractCegarLoop]: Abstraction has 57 states and 62 transitions. [2018-01-20 23:47:16,875 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-20 23:47:16,875 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 62 transitions. [2018-01-20 23:47:16,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-01-20 23:47:16,876 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 23:47:16,877 INFO L322 BasicCegarLoop]: trace histogram [6, 4, 4, 4, 4, 3, 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] [2018-01-20 23:47:16,877 INFO L371 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 23:47:16,877 INFO L82 PathProgramCache]: Analyzing trace with hash 936865683, now seen corresponding path program 3 times [2018-01-20 23:47:16,877 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-20 23:47:16,878 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 23:47:16,878 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 23:47:16,878 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 23:47:16,878 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-20 23:47:16,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 23:47:16,899 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 23:47:16,948 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2018-01-20 23:47:16,949 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 23:47:16,949 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-20 23:47:16,949 INFO L183 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-01-20 23:47:16,949 INFO L434 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-01-20 23:47:16,949 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 23:47:16,949 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-20 23:47:16,961 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-20 23:47:16,961 INFO L280 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-01-20 23:47:16,974 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 23:47:16,979 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 23:47:16,985 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 23:47:16,986 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 23:47:16,989 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 23:47:17,007 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2018-01-20 23:47:17,007 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-20 23:47:17,109 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2018-01-20 23:47:17,136 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 23:47:17,136 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 7 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 7 with cvc4 --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-01-20 23:47:17,139 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-20 23:47:17,140 INFO L280 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-01-20 23:47:17,152 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 23:47:17,163 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 23:47:17,177 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 23:47:17,186 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 23:47:17,191 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 23:47:17,199 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2018-01-20 23:47:17,199 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-20 23:47:17,239 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2018-01-20 23:47:17,241 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-01-20 23:47:17,241 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5] total 9 [2018-01-20 23:47:17,241 INFO L247 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-01-20 23:47:17,242 INFO L409 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-01-20 23:47:17,242 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-01-20 23:47:17,242 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-01-20 23:47:17,242 INFO L87 Difference]: Start difference. First operand 57 states and 62 transitions. Second operand 6 states. [2018-01-20 23:47:17,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 23:47:17,335 INFO L93 Difference]: Finished difference Result 107 states and 120 transitions. [2018-01-20 23:47:17,336 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-20 23:47:17,336 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 62 [2018-01-20 23:47:17,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 23:47:17,338 INFO L225 Difference]: With dead ends: 107 [2018-01-20 23:47:17,338 INFO L226 Difference]: Without dead ends: 86 [2018-01-20 23:47:17,338 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 244 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-01-20 23:47:17,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2018-01-20 23:47:17,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 66. [2018-01-20 23:47:17,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-01-20 23:47:17,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 73 transitions. [2018-01-20 23:47:17,347 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 73 transitions. Word has length 62 [2018-01-20 23:47:17,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 23:47:17,347 INFO L432 AbstractCegarLoop]: Abstraction has 66 states and 73 transitions. [2018-01-20 23:47:17,347 INFO L433 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-01-20 23:47:17,348 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 73 transitions. [2018-01-20 23:47:17,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2018-01-20 23:47:17,349 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 23:47:17,349 INFO L322 BasicCegarLoop]: trace histogram [9, 6, 6, 6, 6, 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] [2018-01-20 23:47:17,349 INFO L371 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 23:47:17,350 INFO L82 PathProgramCache]: Analyzing trace with hash 1345357476, now seen corresponding path program 4 times [2018-01-20 23:47:17,350 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-20 23:47:17,351 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 23:47:17,351 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 23:47:17,351 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 23:47:17,351 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-20 23:47:17,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 23:47:17,372 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 23:47:17,456 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2018-01-20 23:47:17,456 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 23:47:17,456 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-20 23:47:17,456 INFO L183 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-01-20 23:47:17,456 INFO L434 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-01-20 23:47:17,457 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 23:47:17,457 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-20 23:47:17,466 INFO L101 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-01-20 23:47:17,466 INFO L280 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-01-20 23:47:17,495 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 23:47:17,499 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 23:47:17,598 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 118 proven. 9 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2018-01-20 23:47:17,598 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-20 23:47:17,752 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 50 proven. 42 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2018-01-20 23:47:17,772 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 23:47:17,772 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 9 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 9 with cvc4 --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-01-20 23:47:17,775 INFO L101 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-01-20 23:47:17,775 INFO L280 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-01-20 23:47:17,811 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 23:47:17,816 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 23:47:17,844 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 118 proven. 9 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2018-01-20 23:47:17,845 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-20 23:47:17,960 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 50 proven. 42 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2018-01-20 23:47:17,962 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-01-20 23:47:17,962 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8, 8, 8] total 15 [2018-01-20 23:47:17,962 INFO L247 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-01-20 23:47:17,962 INFO L409 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-01-20 23:47:17,963 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-01-20 23:47:17,963 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2018-01-20 23:47:17,963 INFO L87 Difference]: Start difference. First operand 66 states and 73 transitions. Second operand 12 states. [2018-01-20 23:47:18,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 23:47:18,126 INFO L93 Difference]: Finished difference Result 185 states and 209 transitions. [2018-01-20 23:47:18,126 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-01-20 23:47:18,126 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 83 [2018-01-20 23:47:18,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 23:47:18,127 INFO L225 Difference]: With dead ends: 185 [2018-01-20 23:47:18,127 INFO L226 Difference]: Without dead ends: 135 [2018-01-20 23:47:18,128 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 342 GetRequests, 315 SyntacticMatches, 8 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2018-01-20 23:47:18,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2018-01-20 23:47:18,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 96. [2018-01-20 23:47:18,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2018-01-20 23:47:18,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 106 transitions. [2018-01-20 23:47:18,139 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 106 transitions. Word has length 83 [2018-01-20 23:47:18,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 23:47:18,139 INFO L432 AbstractCegarLoop]: Abstraction has 96 states and 106 transitions. [2018-01-20 23:47:18,139 INFO L433 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-01-20 23:47:18,139 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 106 transitions. [2018-01-20 23:47:18,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2018-01-20 23:47:18,141 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 23:47:18,141 INFO L322 BasicCegarLoop]: trace histogram [15, 11, 11, 11, 11, 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] [2018-01-20 23:47:18,141 INFO L371 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 23:47:18,141 INFO L82 PathProgramCache]: Analyzing trace with hash -389182277, now seen corresponding path program 5 times [2018-01-20 23:47:18,141 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-20 23:47:18,142 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 23:47:18,142 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 23:47:18,142 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 23:47:18,142 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-20 23:47:18,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 23:47:18,170 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 23:47:18,255 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 399 trivial. 0 not checked. [2018-01-20 23:47:18,255 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 23:47:18,255 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-20 23:47:18,256 INFO L183 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-01-20 23:47:18,256 INFO L434 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-01-20 23:47:18,256 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 23:47:18,256 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-20 23:47:18,262 INFO L101 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-01-20 23:47:18,262 INFO L280 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder INSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-01-20 23:47:18,273 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 23:47:18,281 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 23:47:18,285 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 23:47:18,289 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 23:47:18,293 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 23:47:18,294 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 23:47:18,303 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 23:47:18,391 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 270 proven. 118 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2018-01-20 23:47:18,392 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-20 23:47:18,622 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 105 proven. 218 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2018-01-20 23:47:18,642 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 23:47:18,642 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 11 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 11 with cvc4 --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-01-20 23:47:18,645 INFO L101 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-01-20 23:47:18,645 INFO L280 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder INSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-01-20 23:47:18,656 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 23:47:18,661 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 23:47:18,673 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 23:47:18,690 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 23:47:18,711 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 23:47:18,722 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 23:47:18,727 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 23:47:18,765 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 302 proven. 95 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2018-01-20 23:47:18,765 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-20 23:47:18,972 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 142 proven. 207 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2018-01-20 23:47:18,974 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-01-20 23:47:18,974 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 13, 13, 13, 13] total 29 [2018-01-20 23:47:18,974 INFO L247 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-01-20 23:47:18,975 INFO L409 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-01-20 23:47:18,975 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-01-20 23:47:18,975 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=688, Unknown=0, NotChecked=0, Total=812 [2018-01-20 23:47:18,975 INFO L87 Difference]: Start difference. First operand 96 states and 106 transitions. Second operand 18 states. [2018-01-20 23:47:19,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 23:47:19,374 INFO L93 Difference]: Finished difference Result 234 states and 263 transitions. [2018-01-20 23:47:19,374 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-01-20 23:47:19,375 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 119 [2018-01-20 23:47:19,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 23:47:19,376 INFO L225 Difference]: With dead ends: 234 [2018-01-20 23:47:19,376 INFO L226 Difference]: Without dead ends: 172 [2018-01-20 23:47:19,377 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 499 GetRequests, 445 SyntacticMatches, 13 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 519 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=316, Invalid=1490, Unknown=0, NotChecked=0, Total=1806 [2018-01-20 23:47:19,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2018-01-20 23:47:19,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 131. [2018-01-20 23:47:19,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2018-01-20 23:47:19,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 145 transitions. [2018-01-20 23:47:19,394 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 145 transitions. Word has length 119 [2018-01-20 23:47:19,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 23:47:19,394 INFO L432 AbstractCegarLoop]: Abstraction has 131 states and 145 transitions. [2018-01-20 23:47:19,394 INFO L433 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-01-20 23:47:19,394 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 145 transitions. [2018-01-20 23:47:19,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2018-01-20 23:47:19,397 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 23:47:19,398 INFO L322 BasicCegarLoop]: trace histogram [22, 17, 17, 17, 17, 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] [2018-01-20 23:47:19,398 INFO L371 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 23:47:19,398 INFO L82 PathProgramCache]: Analyzing trace with hash 349526166, now seen corresponding path program 6 times [2018-01-20 23:47:19,398 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-20 23:47:19,399 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 23:47:19,399 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 23:47:19,399 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 23:47:19,399 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-20 23:47:19,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 23:47:19,429 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 23:47:19,527 INFO L134 CoverageAnalysis]: Checked inductivity of 970 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 910 trivial. 0 not checked. [2018-01-20 23:47:19,527 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 23:47:19,527 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-20 23:47:19,528 INFO L183 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-01-20 23:47:19,528 INFO L434 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-01-20 23:47:19,528 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 23:47:19,528 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-20 23:47:19,532 INFO L101 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-01-20 23:47:19,533 INFO L280 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder MIX_INSIDE_OUTSIDE (IT: FPandBP) [2018-01-20 23:47:19,544 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 23:47:19,548 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 23:47:19,551 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 23:47:19,553 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 23:47:19,556 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 23:47:19,560 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 23:47:19,564 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 23:47:19,567 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 23:47:19,573 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 23:47:19,574 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 23:47:19,577 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 23:47:19,600 INFO L134 CoverageAnalysis]: Checked inductivity of 970 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 910 trivial. 0 not checked. [2018-01-20 23:47:19,600 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-20 23:47:19,680 INFO L134 CoverageAnalysis]: Checked inductivity of 970 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 910 trivial. 0 not checked. [2018-01-20 23:47:19,700 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 23:47:19,700 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 13 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 13 with cvc4 --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-01-20 23:47:19,703 INFO L101 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-01-20 23:47:19,703 INFO L280 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder MIX_INSIDE_OUTSIDE (IT: FPandBP) [2018-01-20 23:47:19,718 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 23:47:19,727 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 23:47:19,744 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 23:47:19,763 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 23:47:19,793 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 23:47:19,823 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 23:47:19,861 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 23:47:19,954 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 23:47:20,128 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 23:47:20,151 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 23:47:20,157 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 23:47:20,181 INFO L134 CoverageAnalysis]: Checked inductivity of 970 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 910 trivial. 0 not checked. [2018-01-20 23:47:20,181 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-20 23:47:20,214 INFO L134 CoverageAnalysis]: Checked inductivity of 970 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 910 trivial. 0 not checked. [2018-01-20 23:47:20,216 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-01-20 23:47:20,216 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8] total 15 [2018-01-20 23:47:20,217 INFO L247 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-01-20 23:47:20,217 INFO L409 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-01-20 23:47:20,217 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-01-20 23:47:20,217 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-01-20 23:47:20,218 INFO L87 Difference]: Start difference. First operand 131 states and 145 transitions. Second operand 9 states. [2018-01-20 23:47:20,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 23:47:20,304 INFO L93 Difference]: Finished difference Result 208 states and 233 transitions. [2018-01-20 23:47:20,304 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-01-20 23:47:20,304 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 160 [2018-01-20 23:47:20,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 23:47:20,306 INFO L225 Difference]: With dead ends: 208 [2018-01-20 23:47:20,306 INFO L226 Difference]: Without dead ends: 175 [2018-01-20 23:47:20,307 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 646 GetRequests, 633 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-01-20 23:47:20,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2018-01-20 23:47:20,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 140. [2018-01-20 23:47:20,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2018-01-20 23:47:20,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 156 transitions. [2018-01-20 23:47:20,319 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 156 transitions. Word has length 160 [2018-01-20 23:47:20,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 23:47:20,320 INFO L432 AbstractCegarLoop]: Abstraction has 140 states and 156 transitions. [2018-01-20 23:47:20,320 INFO L433 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-01-20 23:47:20,320 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 156 transitions. [2018-01-20 23:47:20,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2018-01-20 23:47:20,323 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 23:47:20,323 INFO L322 BasicCegarLoop]: trace histogram [27, 21, 21, 21, 21, 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] [2018-01-20 23:47:20,323 INFO L371 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 23:47:20,324 INFO L82 PathProgramCache]: Analyzing trace with hash -1727385407, now seen corresponding path program 7 times [2018-01-20 23:47:20,324 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-20 23:47:20,324 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 23:47:20,324 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 23:47:20,324 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 23:47:20,325 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-20 23:47:20,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 23:47:20,351 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 23:47:20,554 INFO L134 CoverageAnalysis]: Checked inductivity of 1479 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 1392 trivial. 0 not checked. [2018-01-20 23:47:20,554 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 23:47:20,554 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-20 23:47:20,555 INFO L183 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-01-20 23:47:20,555 INFO L434 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-01-20 23:47:20,555 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 23:47:20,555 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-20 23:47:20,562 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 23:47:20,562 INFO L280 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-01-20 23:47:20,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 23:47:20,617 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 23:47:20,746 INFO L134 CoverageAnalysis]: Checked inductivity of 1479 backedges. 995 proven. 38 refuted. 0 times theorem prover too weak. 446 trivial. 0 not checked. [2018-01-20 23:47:20,746 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-20 23:47:20,954 INFO L134 CoverageAnalysis]: Checked inductivity of 1479 backedges. 311 proven. 240 refuted. 0 times theorem prover too weak. 928 trivial. 0 not checked. [2018-01-20 23:47:20,973 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 23:47:20,973 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 15 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 15 with cvc4 --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-01-20 23:47:20,976 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 23:47:20,976 INFO L280 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-01-20 23:47:21,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 23:47:21,054 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 23:47:21,076 INFO L134 CoverageAnalysis]: Checked inductivity of 1479 backedges. 995 proven. 38 refuted. 0 times theorem prover too weak. 446 trivial. 0 not checked. [2018-01-20 23:47:21,076 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-20 23:47:21,206 INFO L134 CoverageAnalysis]: Checked inductivity of 1479 backedges. 311 proven. 240 refuted. 0 times theorem prover too weak. 928 trivial. 0 not checked. [2018-01-20 23:47:21,207 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-01-20 23:47:21,207 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12, 12, 12, 12] total 24 [2018-01-20 23:47:21,207 INFO L247 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-01-20 23:47:21,208 INFO L409 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-01-20 23:47:21,208 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-01-20 23:47:21,208 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2018-01-20 23:47:21,208 INFO L87 Difference]: Start difference. First operand 140 states and 156 transitions. Second operand 19 states. [2018-01-20 23:47:21,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 23:47:21,507 INFO L93 Difference]: Finished difference Result 363 states and 408 transitions. [2018-01-20 23:47:21,507 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-01-20 23:47:21,507 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 191 [2018-01-20 23:47:21,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 23:47:21,510 INFO L225 Difference]: With dead ends: 363 [2018-01-20 23:47:21,510 INFO L226 Difference]: Without dead ends: 280 [2018-01-20 23:47:21,511 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 782 GetRequests, 737 SyntacticMatches, 12 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=238, Invalid=952, Unknown=0, NotChecked=0, Total=1190 [2018-01-20 23:47:21,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2018-01-20 23:47:21,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 180. [2018-01-20 23:47:21,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2018-01-20 23:47:21,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 201 transitions. [2018-01-20 23:47:21,525 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 201 transitions. Word has length 191 [2018-01-20 23:47:21,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 23:47:21,525 INFO L432 AbstractCegarLoop]: Abstraction has 180 states and 201 transitions. [2018-01-20 23:47:21,525 INFO L433 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-01-20 23:47:21,525 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 201 transitions. [2018-01-20 23:47:21,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2018-01-20 23:47:21,528 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 23:47:21,528 INFO L322 BasicCegarLoop]: trace histogram [36, 29, 29, 29, 29, 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] [2018-01-20 23:47:21,528 INFO L371 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 23:47:21,528 INFO L82 PathProgramCache]: Analyzing trace with hash 927615722, now seen corresponding path program 8 times [2018-01-20 23:47:21,528 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-20 23:47:21,529 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 23:47:21,529 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 23:47:21,529 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 23:47:21,529 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-20 23:47:21,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 23:47:21,556 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 23:47:21,750 INFO L134 CoverageAnalysis]: Checked inductivity of 2681 backedges. 0 proven. 119 refuted. 0 times theorem prover too weak. 2562 trivial. 0 not checked. [2018-01-20 23:47:21,750 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 23:47:21,750 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-20 23:47:21,750 INFO L183 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-01-20 23:47:21,750 INFO L434 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-01-20 23:47:21,751 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 23:47:21,751 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-20 23:47:21,758 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-20 23:47:21,758 INFO L280 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-01-20 23:47:21,774 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 23:47:21,796 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 23:47:21,800 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 23:47:21,804 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 23:47:21,925 INFO L134 CoverageAnalysis]: Checked inductivity of 2681 backedges. 1730 proven. 60 refuted. 0 times theorem prover too weak. 891 trivial. 0 not checked. [2018-01-20 23:47:21,925 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-20 23:47:22,183 INFO L134 CoverageAnalysis]: Checked inductivity of 2681 backedges. 544 proven. 360 refuted. 0 times theorem prover too weak. 1777 trivial. 0 not checked. [2018-01-20 23:47:22,204 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 23:47:22,204 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 17 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 17 with cvc4 --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-01-20 23:47:22,207 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-20 23:47:22,207 INFO L280 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-01-20 23:47:22,225 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 23:47:22,268 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 23:47:22,299 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 23:47:22,307 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 23:47:22,346 INFO L134 CoverageAnalysis]: Checked inductivity of 2681 backedges. 1730 proven. 60 refuted. 0 times theorem prover too weak. 891 trivial. 0 not checked. [2018-01-20 23:47:22,346 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-20 23:47:22,523 INFO L134 CoverageAnalysis]: Checked inductivity of 2681 backedges. 544 proven. 360 refuted. 0 times theorem prover too weak. 1777 trivial. 0 not checked. [2018-01-20 23:47:22,525 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-01-20 23:47:22,525 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14, 14, 14, 14] total 28 [2018-01-20 23:47:22,525 INFO L247 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-01-20 23:47:22,526 INFO L409 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-01-20 23:47:22,526 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-01-20 23:47:22,526 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=607, Unknown=0, NotChecked=0, Total=756 [2018-01-20 23:47:22,526 INFO L87 Difference]: Start difference. First operand 180 states and 201 transitions. Second operand 22 states. [2018-01-20 23:47:22,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 23:47:22,951 INFO L93 Difference]: Finished difference Result 460 states and 516 transitions. [2018-01-20 23:47:22,951 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-01-20 23:47:22,951 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 242 [2018-01-20 23:47:22,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 23:47:22,953 INFO L225 Difference]: With dead ends: 460 [2018-01-20 23:47:22,953 INFO L226 Difference]: Without dead ends: 365 [2018-01-20 23:47:22,954 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 989 GetRequests, 936 SyntacticMatches, 14 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=316, Invalid=1324, Unknown=0, NotChecked=0, Total=1640 [2018-01-20 23:47:22,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2018-01-20 23:47:22,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 225. [2018-01-20 23:47:22,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 225 states. [2018-01-20 23:47:22,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 252 transitions. [2018-01-20 23:47:22,969 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 252 transitions. Word has length 242 [2018-01-20 23:47:22,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 23:47:22,970 INFO L432 AbstractCegarLoop]: Abstraction has 225 states and 252 transitions. [2018-01-20 23:47:22,970 INFO L433 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-01-20 23:47:22,970 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 252 transitions. [2018-01-20 23:47:22,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 299 [2018-01-20 23:47:22,971 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 23:47:22,971 INFO L322 BasicCegarLoop]: trace histogram [46, 38, 38, 38, 38, 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] [2018-01-20 23:47:22,972 INFO L371 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 23:47:22,972 INFO L82 PathProgramCache]: Analyzing trace with hash -965692109, now seen corresponding path program 9 times [2018-01-20 23:47:22,972 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-20 23:47:22,972 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 23:47:22,973 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 23:47:22,973 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 23:47:22,973 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-20 23:47:23,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 23:47:23,007 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 23:47:23,312 INFO L134 CoverageAnalysis]: Checked inductivity of 4447 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 4291 trivial. 0 not checked. [2018-01-20 23:47:23,312 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 23:47:23,312 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-20 23:47:23,312 INFO L183 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-01-20 23:47:23,312 INFO L434 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-01-20 23:47:23,312 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 23:47:23,313 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-20 23:47:23,324 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-20 23:47:23,324 INFO L280 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-01-20 23:47:23,349 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 23:47:23,365 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 23:47:23,370 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 23:47:23,384 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 23:47:23,391 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 23:47:23,399 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 23:47:23,407 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 23:47:23,413 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 23:47:23,415 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 23:47:23,421 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 23:47:23,557 INFO L134 CoverageAnalysis]: Checked inductivity of 4447 backedges. 1173 proven. 87 refuted. 0 times theorem prover too weak. 3187 trivial. 0 not checked. [2018-01-20 23:47:23,558 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-20 23:47:23,993 INFO L134 CoverageAnalysis]: Checked inductivity of 4447 backedges. 1173 proven. 87 refuted. 0 times theorem prover too weak. 3187 trivial. 0 not checked. [2018-01-20 23:47:24,015 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 23:47:24,015 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 19 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 19 with cvc4 --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-01-20 23:47:24,018 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-20 23:47:24,018 INFO L280 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-01-20 23:47:24,048 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 23:47:24,057 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 23:47:24,072 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 23:47:24,094 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 23:47:24,133 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 23:47:24,210 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 23:47:24,332 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 23:47:24,571 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 23:47:24,595 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 23:47:24,602 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 23:47:24,646 INFO L134 CoverageAnalysis]: Checked inductivity of 4447 backedges. 1173 proven. 87 refuted. 0 times theorem prover too weak. 3187 trivial. 0 not checked. [2018-01-20 23:47:24,646 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-20 23:47:24,848 INFO L134 CoverageAnalysis]: Checked inductivity of 4447 backedges. 1173 proven. 87 refuted. 0 times theorem prover too weak. 3187 trivial. 0 not checked. [2018-01-20 23:47:24,850 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-01-20 23:47:24,851 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12, 12, 12] total 29 [2018-01-20 23:47:24,851 INFO L247 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-01-20 23:47:24,851 INFO L409 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-01-20 23:47:24,851 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-01-20 23:47:24,852 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=596, Unknown=0, NotChecked=0, Total=812 [2018-01-20 23:47:24,852 INFO L87 Difference]: Start difference. First operand 225 states and 252 transitions. Second operand 19 states. [2018-01-20 23:47:25,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 23:47:25,170 INFO L93 Difference]: Finished difference Result 535 states and 610 transitions. [2018-01-20 23:47:25,171 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-01-20 23:47:25,171 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 298 [2018-01-20 23:47:25,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 23:47:25,174 INFO L225 Difference]: With dead ends: 535 [2018-01-20 23:47:25,175 INFO L226 Difference]: Without dead ends: 490 [2018-01-20 23:47:25,175 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 1208 GetRequests, 1172 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=342, Invalid=918, Unknown=0, NotChecked=0, Total=1260 [2018-01-20 23:47:25,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2018-01-20 23:47:25,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 283. [2018-01-20 23:47:25,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 283 states. [2018-01-20 23:47:25,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 322 transitions. [2018-01-20 23:47:25,194 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 322 transitions. Word has length 298 [2018-01-20 23:47:25,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 23:47:25,194 INFO L432 AbstractCegarLoop]: Abstraction has 283 states and 322 transitions. [2018-01-20 23:47:25,194 INFO L433 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-01-20 23:47:25,195 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 322 transitions. [2018-01-20 23:47:25,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 360 [2018-01-20 23:47:25,196 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 23:47:25,197 INFO L322 BasicCegarLoop]: trace histogram [57, 48, 48, 48, 48, 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] [2018-01-20 23:47:25,197 INFO L371 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 23:47:25,197 INFO L82 PathProgramCache]: Analyzing trace with hash -1850454344, now seen corresponding path program 10 times [2018-01-20 23:47:25,197 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-20 23:47:25,198 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 23:47:25,198 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 23:47:25,198 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 23:47:25,198 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-20 23:47:25,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 23:47:25,227 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 23:47:25,526 INFO L134 CoverageAnalysis]: Checked inductivity of 6918 backedges. 0 proven. 198 refuted. 0 times theorem prover too weak. 6720 trivial. 0 not checked. [2018-01-20 23:47:25,526 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 23:47:25,526 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-20 23:47:25,527 INFO L183 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-01-20 23:47:25,527 INFO L434 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-01-20 23:47:25,527 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 23:47:25,527 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-20 23:47:25,532 INFO L101 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-01-20 23:47:25,532 INFO L280 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-01-20 23:47:25,597 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 23:47:25,603 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 23:47:25,839 INFO L134 CoverageAnalysis]: Checked inductivity of 6918 backedges. 4094 proven. 119 refuted. 0 times theorem prover too weak. 2705 trivial. 0 not checked. [2018-01-20 23:47:25,839 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-20 23:47:26,353 INFO L134 CoverageAnalysis]: Checked inductivity of 6918 backedges. 1298 proven. 675 refuted. 0 times theorem prover too weak. 4945 trivial. 0 not checked. [2018-01-20 23:47:26,374 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 23:47:26,374 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 21 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 21 with cvc4 --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-01-20 23:47:26,377 INFO L101 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-01-20 23:47:26,377 INFO L280 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-01-20 23:47:26,508 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 23:47:26,518 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 23:47:26,584 INFO L134 CoverageAnalysis]: Checked inductivity of 6918 backedges. 4094 proven. 119 refuted. 0 times theorem prover too weak. 2705 trivial. 0 not checked. [2018-01-20 23:47:26,584 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-20 23:47:26,830 INFO L134 CoverageAnalysis]: Checked inductivity of 6918 backedges. 1298 proven. 675 refuted. 0 times theorem prover too weak. 4945 trivial. 0 not checked. [2018-01-20 23:47:26,833 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-01-20 23:47:26,833 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 18, 18, 18, 18] total 36 [2018-01-20 23:47:26,833 INFO L247 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-01-20 23:47:26,833 INFO L409 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-01-20 23:47:26,834 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-01-20 23:47:26,834 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=1024, Unknown=0, NotChecked=0, Total=1260 [2018-01-20 23:47:26,834 INFO L87 Difference]: Start difference. First operand 283 states and 322 transitions. Second operand 28 states. [2018-01-20 23:47:27,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 23:47:27,550 INFO L93 Difference]: Finished difference Result 722 states and 827 transitions. [2018-01-20 23:47:27,550 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-01-20 23:47:27,550 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 359 [2018-01-20 23:47:27,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 23:47:27,556 INFO L225 Difference]: With dead ends: 722 [2018-01-20 23:47:27,556 INFO L226 Difference]: Without dead ends: 593 [2018-01-20 23:47:27,558 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 1463 GetRequests, 1394 SyntacticMatches, 18 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 893 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=505, Invalid=2251, Unknown=0, NotChecked=0, Total=2756 [2018-01-20 23:47:27,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 593 states. [2018-01-20 23:47:27,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 593 to 338. [2018-01-20 23:47:27,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 338 states. [2018-01-20 23:47:27,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 382 transitions. [2018-01-20 23:47:27,586 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 382 transitions. Word has length 359 [2018-01-20 23:47:27,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 23:47:27,587 INFO L432 AbstractCegarLoop]: Abstraction has 338 states and 382 transitions. [2018-01-20 23:47:27,587 INFO L433 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-01-20 23:47:27,587 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 382 transitions. [2018-01-20 23:47:27,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 421 [2018-01-20 23:47:27,590 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 23:47:27,591 INFO L322 BasicCegarLoop]: trace histogram [68, 58, 58, 58, 58, 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] [2018-01-20 23:47:27,591 INFO L371 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 23:47:27,591 INFO L82 PathProgramCache]: Analyzing trace with hash 1447339731, now seen corresponding path program 11 times [2018-01-20 23:47:27,591 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-20 23:47:27,592 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 23:47:27,592 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 23:47:27,592 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 23:47:27,592 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-20 23:47:27,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 23:47:27,637 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 23:47:28,181 INFO L134 CoverageAnalysis]: Checked inductivity of 9940 backedges. 0 proven. 245 refuted. 0 times theorem prover too weak. 9695 trivial. 0 not checked. [2018-01-20 23:47:28,181 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 23:47:28,181 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-20 23:47:28,182 INFO L183 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-01-20 23:47:28,182 INFO L434 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-01-20 23:47:28,182 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 23:47:28,182 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-20 23:47:28,190 INFO L101 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-01-20 23:47:28,190 INFO L280 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder INSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-01-20 23:47:28,223 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 23:47:28,228 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 23:47:28,233 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 23:47:28,241 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 23:47:28,250 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 23:47:28,259 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 23:47:28,267 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 23:47:28,276 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 23:47:28,285 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 23:47:28,287 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 23:47:28,295 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 23:47:28,588 INFO L134 CoverageAnalysis]: Checked inductivity of 9940 backedges. 5758 proven. 500 refuted. 0 times theorem prover too weak. 3682 trivial. 0 not checked. [2018-01-20 23:47:28,588 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-20 23:47:29,123 INFO L134 CoverageAnalysis]: Checked inductivity of 9940 backedges. 874 proven. 2168 refuted. 0 times theorem prover too weak. 6898 trivial. 0 not checked. [2018-01-20 23:47:29,157 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 23:47:29,157 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 23 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 23 with cvc4 --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-01-20 23:47:29,161 INFO L101 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-01-20 23:47:29,161 INFO L280 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder INSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-01-20 23:47:29,193 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 23:47:29,202 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 23:47:29,220 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 23:47:29,249 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 23:47:29,298 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 23:47:29,359 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 23:47:29,431 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 23:47:29,520 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 23:47:29,599 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 23:47:29,625 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 23:47:29,634 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 23:47:29,717 INFO L134 CoverageAnalysis]: Checked inductivity of 9940 backedges. 5758 proven. 500 refuted. 0 times theorem prover too weak. 3682 trivial. 0 not checked. [2018-01-20 23:47:29,717 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-20 23:47:30,032 INFO L134 CoverageAnalysis]: Checked inductivity of 9940 backedges. 874 proven. 2168 refuted. 0 times theorem prover too weak. 6898 trivial. 0 not checked. [2018-01-20 23:47:30,034 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-01-20 23:47:30,034 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19, 19, 19, 19] total 40 [2018-01-20 23:47:30,034 INFO L247 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-01-20 23:47:30,034 INFO L409 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-01-20 23:47:30,035 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-01-20 23:47:30,035 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=1326, Unknown=0, NotChecked=0, Total=1560 [2018-01-20 23:47:30,035 INFO L87 Difference]: Start difference. First operand 338 states and 382 transitions. Second operand 30 states. [2018-01-20 23:47:31,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 23:47:31,744 INFO L93 Difference]: Finished difference Result 804 states and 906 transitions. [2018-01-20 23:47:31,744 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-01-20 23:47:31,745 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 420 [2018-01-20 23:47:31,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 23:47:31,747 INFO L225 Difference]: With dead ends: 804 [2018-01-20 23:47:31,747 INFO L226 Difference]: Without dead ends: 458 [2018-01-20 23:47:31,750 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 1730 GetRequests, 1645 SyntacticMatches, 18 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1324 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=764, Invalid=3928, Unknown=0, NotChecked=0, Total=4692 [2018-01-20 23:47:31,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2018-01-20 23:47:31,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 339. [2018-01-20 23:47:31,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 339 states. [2018-01-20 23:47:31,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 376 transitions. [2018-01-20 23:47:31,769 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 376 transitions. Word has length 420 [2018-01-20 23:47:31,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 23:47:31,770 INFO L432 AbstractCegarLoop]: Abstraction has 339 states and 376 transitions. [2018-01-20 23:47:31,770 INFO L433 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-01-20 23:47:31,770 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 376 transitions. [2018-01-20 23:47:31,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 477 [2018-01-20 23:47:31,772 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 23:47:31,772 INFO L322 BasicCegarLoop]: trace histogram [78, 67, 67, 67, 67, 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] [2018-01-20 23:47:31,772 INFO L371 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 23:47:31,773 INFO L82 PathProgramCache]: Analyzing trace with hash 593814198, now seen corresponding path program 12 times [2018-01-20 23:47:31,773 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-20 23:47:31,773 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 23:47:31,774 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 23:47:31,774 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 23:47:31,774 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-20 23:47:31,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 23:47:31,807 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 23:47:32,343 INFO L134 CoverageAnalysis]: Checked inductivity of 13156 backedges. 0 proven. 297 refuted. 0 times theorem prover too weak. 12859 trivial. 0 not checked. [2018-01-20 23:47:32,343 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 23:47:32,343 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-20 23:47:32,343 INFO L183 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-01-20 23:47:32,343 INFO L434 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-01-20 23:47:32,343 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 23:47:32,343 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-20 23:47:32,350 INFO L101 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-01-20 23:47:32,350 INFO L280 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder MIX_INSIDE_OUTSIDE (IT: FPandBP) [2018-01-20 23:47:32,388 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 23:47:32,402 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 23:47:32,406 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 23:47:32,410 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 23:47:32,414 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 23:47:32,419 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 23:47:32,425 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 23:47:32,432 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 23:47:32,441 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 23:47:32,449 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 23:47:32,457 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 23:47:32,465 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 23:47:32,474 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 23:47:32,483 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 23:47:32,492 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 23:47:32,502 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 23:47:32,514 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 23:47:32,524 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 23:47:32,535 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 23:47:32,536 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 23:47:32,542 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 23:47:32,793 INFO L134 CoverageAnalysis]: Checked inductivity of 13156 backedges. 2730 proven. 156 refuted. 0 times theorem prover too weak. 10270 trivial. 0 not checked. [2018-01-20 23:47:32,793 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-20 23:47:33,275 INFO L134 CoverageAnalysis]: Checked inductivity of 13156 backedges. 2730 proven. 156 refuted. 0 times theorem prover too weak. 10270 trivial. 0 not checked. [2018-01-20 23:47:33,296 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 23:47:33,296 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 25 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 25 with cvc4 --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-01-20 23:47:33,299 INFO L101 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-01-20 23:47:33,299 INFO L280 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder MIX_INSIDE_OUTSIDE (IT: FPandBP) [2018-01-20 23:47:33,337 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 23:47:33,350 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 23:47:33,373 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 23:47:33,400 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 23:47:33,455 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 23:47:33,548 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 23:47:33,975 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 23:47:37,993 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 23:47:50,030 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 23:48:02,086 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command Received shutdown request... [2018-01-20 23:48:14,141 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command Cannot interrupt operation gracefully because timeout expired. Forcing shutdown