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_imprecise.epf -i ../../../trunk/examples/svcomp/ldv-memsafety/ArraysWithLenghtAtDeclaration_false-valid-deref-read.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-2f49842 [2018-01-21 00:44:59,811 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-21 00:44:59,813 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-21 00:44:59,827 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-21 00:44:59,827 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-21 00:44:59,828 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-21 00:44:59,829 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-21 00:44:59,831 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-21 00:44:59,833 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-21 00:44:59,834 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-21 00:44:59,834 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-01-21 00:44:59,835 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-01-21 00:44:59,835 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-01-21 00:44:59,836 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-01-21 00:44:59,837 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-01-21 00:44:59,839 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-01-21 00:44:59,841 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-01-21 00:44:59,843 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-01-21 00:44:59,844 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-01-21 00:44:59,845 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-01-21 00:44:59,848 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-01-21 00:44:59,853 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-01-21 00:44:59,853 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-01-21 00:44:59,853 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_imprecise.epf [2018-01-21 00:44:59,863 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-21 00:44:59,864 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-21 00:44:59,864 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-21 00:44:59,865 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-21 00:44:59,865 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-21 00:44:59,865 INFO L133 SettingsManager]: * Deactivate Weak Equivalences=true [2018-01-21 00:44:59,865 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-21 00:44:59,865 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-21 00:44:59,866 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-21 00:44:59,866 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-21 00:44:59,866 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-21 00:44:59,867 INFO L133 SettingsManager]: * Check allocation purity=true [2018-01-21 00:44:59,867 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-21 00:44:59,867 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-21 00:44:59,867 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-21 00:44:59,867 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-01-21 00:44:59,868 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-21 00:44:59,868 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-01-21 00:44:59,868 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-21 00:44:59,868 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-01-21 00:44:59,868 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-01-21 00:44:59,869 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-21 00:44:59,869 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-01-21 00:44:59,869 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-21 00:44:59,869 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-21 00:44:59,869 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-21 00:44:59,870 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-21 00:44:59,870 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-21 00:44:59,870 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-21 00:44:59,870 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-21 00:44:59,870 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-21 00:44:59,871 INFO L133 SettingsManager]: * Stop after first violation was found=false [2018-01-21 00:44:59,871 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-01-21 00:44:59,871 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-21 00:44:59,871 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-21 00:44:59,871 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-21 00:44:59,871 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-01-21 00:44:59,872 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-21 00:44:59,873 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-21 00:44:59,906 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-21 00:44:59,918 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-21 00:44:59,922 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-21 00:44:59,924 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-21 00:44:59,924 INFO L276 PluginConnector]: CDTParser initialized [2018-01-21 00:44:59,925 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-memsafety/ArraysWithLenghtAtDeclaration_false-valid-deref-read.c [2018-01-21 00:45:00,056 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-21 00:45:00,061 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-21 00:45:00,062 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-21 00:45:00,062 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-21 00:45:00,068 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-21 00:45:00,069 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.01 12:45:00" (1/1) ... [2018-01-21 00:45:00,071 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@64aec2c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 12:45:00, skipping insertion in model container [2018-01-21 00:45:00,072 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.01 12:45:00" (1/1) ... [2018-01-21 00:45:00,089 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-21 00:45:00,107 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-21 00:45:00,223 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-21 00:45:00,237 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-21 00:45:00,244 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 12:45:00 WrapperNode [2018-01-21 00:45:00,245 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-21 00:45:00,245 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-21 00:45:00,245 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-21 00:45:00,245 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-21 00:45:00,256 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 12:45:00" (1/1) ... [2018-01-21 00:45:00,256 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 12:45:00" (1/1) ... [2018-01-21 00:45:00,263 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 12:45:00" (1/1) ... [2018-01-21 00:45:00,263 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 12:45:00" (1/1) ... [2018-01-21 00:45:00,265 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 12:45:00" (1/1) ... [2018-01-21 00:45:00,268 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 12:45:00" (1/1) ... [2018-01-21 00:45:00,269 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 12:45:00" (1/1) ... [2018-01-21 00:45:00,270 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-21 00:45:00,270 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-21 00:45:00,271 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-21 00:45:00,271 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-21 00:45:00,272 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 12:45:00" (1/1) ... No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-21 00:45:00,317 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-21 00:45:00,317 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-21 00:45:00,317 INFO L136 BoogieDeclarations]: Found implementation of procedure foo [2018-01-21 00:45:00,317 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-21 00:45:00,318 INFO L128 BoogieDeclarations]: Found specification of procedure write~int [2018-01-21 00:45:00,318 INFO L128 BoogieDeclarations]: Found specification of procedure read~int [2018-01-21 00:45:00,318 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-01-21 00:45:00,318 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-01-21 00:45:00,318 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-01-21 00:45:00,318 INFO L128 BoogieDeclarations]: Found specification of procedure foo [2018-01-21 00:45:00,319 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-21 00:45:00,319 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-21 00:45:00,319 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-21 00:45:00,467 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-21 00:45:00,468 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.01 12:45:00 BoogieIcfgContainer [2018-01-21 00:45:00,468 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-21 00:45:00,468 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-01-21 00:45:00,469 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-01-21 00:45:00,470 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-01-21 00:45:00,470 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.01 12:45:00" (1/3) ... [2018-01-21 00:45:00,471 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4545cab7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.01 12:45:00, skipping insertion in model container [2018-01-21 00:45:00,471 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 12:45:00" (2/3) ... [2018-01-21 00:45:00,472 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4545cab7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.01 12:45:00, skipping insertion in model container [2018-01-21 00:45:00,472 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.01 12:45:00" (3/3) ... [2018-01-21 00:45:00,473 INFO L105 eAbstractionObserver]: Analyzing ICFG ArraysWithLenghtAtDeclaration_false-valid-deref-read.c [2018-01-21 00:45:00,479 INFO L130 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-01-21 00:45:00,485 INFO L142 ceAbstractionStarter]: Appying trace abstraction to program that has 4 error locations. [2018-01-21 00:45:00,530 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 00:45:00,530 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 00:45:00,530 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 00:45:00,530 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 00:45:00,530 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 00:45:00,531 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 00:45:00,531 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 00:45:00,531 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.initErr0EnsuresViolation======== [2018-01-21 00:45:00,532 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 00:45:00,551 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states. [2018-01-21 00:45:00,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-01-21 00:45:00,557 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 00:45:00,558 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-01-21 00:45:00,559 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.initErr0EnsuresViolation]=== [2018-01-21 00:45:00,564 INFO L82 PathProgramCache]: Analyzing trace with hash 100907, now seen corresponding path program 1 times [2018-01-21 00:45:00,567 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 00:45:00,611 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:45:00,611 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 00:45:00,611 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:45:00,611 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 00:45:00,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 00:45:00,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 00:45:00,663 INFO L381 BasicCegarLoop]: Counterexample might be feasible [2018-01-21 00:45:00,669 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 00:45:00,674 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 00:45:00,674 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 00:45:00,674 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 00:45:00,674 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 00:45:00,674 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 00:45:00,675 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 00:45:00,675 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 00:45:00,675 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooErr0EnsuresViolation======== [2018-01-21 00:45:00,675 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 00:45:00,676 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states. [2018-01-21 00:45:00,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-01-21 00:45:00,677 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 00:45:00,677 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 00:45:00,677 INFO L371 AbstractCegarLoop]: === Iteration 1 === [fooErr0EnsuresViolation]=== [2018-01-21 00:45:00,678 INFO L82 PathProgramCache]: Analyzing trace with hash 352444009, now seen corresponding path program 1 times [2018-01-21 00:45:00,678 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 00:45:00,679 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:45:00,679 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 00:45:00,679 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:45:00,679 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 00:45:00,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 00:45:00,701 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 00:45:00,730 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-21 00:45:00,732 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 00:45:00,732 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-21 00:45:00,732 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 00:45:00,734 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-21 00:45:00,744 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-21 00:45:00,745 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-21 00:45:00,746 INFO L87 Difference]: Start difference. First operand 41 states. Second operand 2 states. [2018-01-21 00:45:00,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 00:45:00,775 INFO L93 Difference]: Finished difference Result 72 states and 86 transitions. [2018-01-21 00:45:00,775 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-21 00:45:00,776 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 15 [2018-01-21 00:45:00,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 00:45:00,784 INFO L225 Difference]: With dead ends: 72 [2018-01-21 00:45:00,784 INFO L226 Difference]: Without dead ends: 0 [2018-01-21 00:45:00,788 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-21 00:45:00,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-01-21 00:45:00,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-01-21 00:45:00,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-01-21 00:45:00,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-01-21 00:45:00,881 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 15 [2018-01-21 00:45:00,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 00:45:00,881 INFO L432 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-01-21 00:45:00,881 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-21 00:45:00,881 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-01-21 00:45:00,881 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-01-21 00:45:00,883 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 00:45:00,884 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 00:45:00,884 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 00:45:00,884 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 00:45:00,884 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 00:45:00,884 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 00:45:00,884 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 00:45:00,884 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.startErr0EnsuresViolation======== [2018-01-21 00:45:00,884 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 00:45:00,885 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states. [2018-01-21 00:45:00,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-01-21 00:45:00,886 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 00:45:00,886 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 00:45:00,887 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 00:45:00,887 INFO L82 PathProgramCache]: Analyzing trace with hash -1481761889, now seen corresponding path program 1 times [2018-01-21 00:45:00,887 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 00:45:00,888 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:45:00,888 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 00:45:00,888 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:45:00,888 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 00:45:00,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 00:45:00,896 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 00:45:00,906 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-21 00:45:00,906 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 00:45:00,906 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-21 00:45:00,906 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 00:45:00,907 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-21 00:45:00,907 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-21 00:45:00,907 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-21 00:45:00,907 INFO L87 Difference]: Start difference. First operand 41 states. Second operand 2 states. [2018-01-21 00:45:00,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 00:45:00,911 INFO L93 Difference]: Finished difference Result 72 states and 86 transitions. [2018-01-21 00:45:00,912 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-21 00:45:00,912 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 17 [2018-01-21 00:45:00,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 00:45:00,913 INFO L225 Difference]: With dead ends: 72 [2018-01-21 00:45:00,914 INFO L226 Difference]: Without dead ends: 37 [2018-01-21 00:45:00,914 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-21 00:45:00,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-01-21 00:45:00,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-01-21 00:45:00,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-01-21 00:45:00,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 40 transitions. [2018-01-21 00:45:00,923 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 40 transitions. Word has length 17 [2018-01-21 00:45:00,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 00:45:00,923 INFO L432 AbstractCegarLoop]: Abstraction has 37 states and 40 transitions. [2018-01-21 00:45:00,924 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-21 00:45:00,924 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 40 transitions. [2018-01-21 00:45:00,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-01-21 00:45:00,924 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 00:45:00,924 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 00:45:00,925 INFO L371 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 00:45:00,925 INFO L82 PathProgramCache]: Analyzing trace with hash 499012364, now seen corresponding path program 1 times [2018-01-21 00:45:00,925 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 00:45:00,926 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:45:00,926 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 00:45:00,926 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:45:00,926 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 00:45:00,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 00:45:00,935 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 00:45:00,974 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-21 00:45:00,974 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 00:45:00,974 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-21 00:45:00,974 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 00:45:00,976 INFO L409 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-01-21 00:45:00,976 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-01-21 00:45:00,977 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-01-21 00:45:00,977 INFO L87 Difference]: Start difference. First operand 37 states and 40 transitions. Second operand 3 states. [2018-01-21 00:45:01,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 00:45:01,044 INFO L93 Difference]: Finished difference Result 66 states and 74 transitions. [2018-01-21 00:45:01,044 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-01-21 00:45:01,045 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2018-01-21 00:45:01,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 00:45:01,048 INFO L225 Difference]: With dead ends: 66 [2018-01-21 00:45:01,048 INFO L226 Difference]: Without dead ends: 51 [2018-01-21 00:45:01,049 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-01-21 00:45:01,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-01-21 00:45:01,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 41. [2018-01-21 00:45:01,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-01-21 00:45:01,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions. [2018-01-21 00:45:01,059 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 19 [2018-01-21 00:45:01,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 00:45:01,060 INFO L432 AbstractCegarLoop]: Abstraction has 41 states and 44 transitions. [2018-01-21 00:45:01,060 INFO L433 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-01-21 00:45:01,060 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2018-01-21 00:45:01,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-01-21 00:45:01,061 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 00:45:01,061 INFO L322 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 00:45:01,061 INFO L371 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 00:45:01,061 INFO L82 PathProgramCache]: Analyzing trace with hash 1504830404, now seen corresponding path program 1 times [2018-01-21 00:45:01,061 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 00:45:01,062 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:45:01,062 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 00:45:01,063 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:45:01,063 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 00:45:01,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 00:45:01,082 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 00:45:01,240 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-21 00:45:01,240 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 00:45:01,241 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-01-21 00:45:01,241 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 00:45:01,241 INFO L409 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-01-21 00:45:01,241 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-01-21 00:45:01,241 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-01-21 00:45:01,242 INFO L87 Difference]: Start difference. First operand 41 states and 44 transitions. Second operand 6 states. [2018-01-21 00:45:01,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 00:45:01,386 INFO L93 Difference]: Finished difference Result 90 states and 100 transitions. [2018-01-21 00:45:01,386 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-21 00:45:01,386 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 31 [2018-01-21 00:45:01,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 00:45:01,387 INFO L225 Difference]: With dead ends: 90 [2018-01-21 00:45:01,387 INFO L226 Difference]: Without dead ends: 59 [2018-01-21 00:45:01,388 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 [2018-01-21 00:45:01,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-01-21 00:45:01,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 47. [2018-01-21 00:45:01,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-01-21 00:45:01,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 52 transitions. [2018-01-21 00:45:01,394 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 52 transitions. Word has length 31 [2018-01-21 00:45:01,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 00:45:01,395 INFO L432 AbstractCegarLoop]: Abstraction has 47 states and 52 transitions. [2018-01-21 00:45:01,395 INFO L433 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-01-21 00:45:01,395 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 52 transitions. [2018-01-21 00:45:01,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-01-21 00:45:01,396 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 00:45:01,397 INFO L322 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 00:45:01,397 INFO L371 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 00:45:01,397 INFO L82 PathProgramCache]: Analyzing trace with hash -151955344, now seen corresponding path program 1 times [2018-01-21 00:45:01,397 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 00:45:01,398 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:45:01,398 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 00:45:01,398 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:45:01,398 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 00:45:01,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 00:45:01,414 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 00:45:01,576 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-21 00:45:01,576 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 00:45:01,576 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-21 00:45:01,577 INFO L199 CegarAbsIntRunner]: Running AI on error trace of length 37 with the following transitions: [2018-01-21 00:45:01,578 INFO L201 CegarAbsIntRunner]: [0], [1], [3], [7], [10], [12], [13], [14], [16], [20], [21], [26], [27], [28], [29], [33], [36], [38], [40], [42], [46], [50], [55], [58], [60], [61], [62], [72], [74], [75], [76], [77], [78], [79] [2018-01-21 00:45:01,624 INFO L147 AbstractInterpreter]: Using domain VPDomain [2018-01-21 00:45:01,624 INFO L101 FixpointEngine]: Starting fixpoint engine with domain VPDomain (maxUnwinding=3, maxParallelStates=2) [2018-01-21 00:45:02,038 INFO L259 AbstractInterpreter]: Some error location(s) were reachable [2018-01-21 00:45:02,040 INFO L268 AbstractInterpreter]: Visited 34 different actions 114 times. Merged at 22 different actions 55 times. Never widened. Found 9 fixpoints after 5 different actions. Largest state had 21 variables. [2018-01-21 00:45:02,065 INFO L434 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-01-21 00:45:02,065 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 00:45:02,066 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-21 00:45:02,078 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 00:45:02,078 INFO L280 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-01-21 00:45:02,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 00:45:02,107 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-21 00:45:02,198 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-21 00:45:02,198 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-21 00:45:02,409 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-21 00:45:02,443 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 00:45:02,443 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 [2018-01-21 00:45:02,447 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 00:45:02,447 INFO L280 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-01-21 00:45:02,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 00:45:02,480 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-21 00:45:02,532 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-01-21 00:45:02,532 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-21 00:45:02,588 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-01-21 00:45:02,590 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-01-21 00:45:02,590 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 4, 4] total 16 [2018-01-21 00:45:02,591 INFO L247 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-01-21 00:45:02,591 INFO L409 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-01-21 00:45:02,591 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-01-21 00:45:02,592 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2018-01-21 00:45:02,592 INFO L87 Difference]: Start difference. First operand 47 states and 52 transitions. Second operand 10 states. [2018-01-21 00:45:02,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 00:45:02,843 INFO L93 Difference]: Finished difference Result 103 states and 115 transitions. [2018-01-21 00:45:02,843 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-01-21 00:45:02,843 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 36 [2018-01-21 00:45:02,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 00:45:02,845 INFO L225 Difference]: With dead ends: 103 [2018-01-21 00:45:02,845 INFO L226 Difference]: Without dead ends: 61 [2018-01-21 00:45:02,846 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 [2018-01-21 00:45:02,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-01-21 00:45:02,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 48. [2018-01-21 00:45:02,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-01-21 00:45:02,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 51 transitions. [2018-01-21 00:45:02,852 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 51 transitions. Word has length 36 [2018-01-21 00:45:02,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 00:45:02,853 INFO L432 AbstractCegarLoop]: Abstraction has 48 states and 51 transitions. [2018-01-21 00:45:02,853 INFO L433 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-01-21 00:45:02,853 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 51 transitions. [2018-01-21 00:45:02,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-01-21 00:45:02,854 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 00:45:02,854 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] [2018-01-21 00:45:02,854 INFO L371 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 00:45:02,855 INFO L82 PathProgramCache]: Analyzing trace with hash -524554428, now seen corresponding path program 2 times [2018-01-21 00:45:02,855 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 00:45:02,856 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:45:02,856 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 00:45:02,856 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:45:02,857 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 00:45:02,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 00:45:02,871 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 00:45:02,904 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-01-21 00:45:02,904 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 00:45:02,904 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-21 00:45:02,904 INFO L183 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-01-21 00:45:02,904 INFO L434 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-01-21 00:45:02,905 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 00:45:02,905 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 [2018-01-21 00:45:02,910 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-21 00:45:02,910 INFO L280 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-01-21 00:45:02,921 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-21 00:45:02,926 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-21 00:45:02,927 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-21 00:45:02,930 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-21 00:45:02,958 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-01-21 00:45:02,958 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-21 00:45:02,975 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-01-21 00:45:02,995 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 00:45:02,995 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 [2018-01-21 00:45:02,998 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-21 00:45:02,998 INFO L280 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-01-21 00:45:03,008 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-21 00:45:03,018 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-21 00:45:03,025 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-21 00:45:03,028 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-21 00:45:03,032 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-01-21 00:45:03,032 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-21 00:45:03,062 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-01-21 00:45:03,064 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-01-21 00:45:03,065 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4] total 7 [2018-01-21 00:45:03,065 INFO L247 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-01-21 00:45:03,065 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-21 00:45:03,065 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-21 00:45:03,066 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-01-21 00:45:03,066 INFO L87 Difference]: Start difference. First operand 48 states and 51 transitions. Second operand 5 states. [2018-01-21 00:45:03,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 00:45:03,123 INFO L93 Difference]: Finished difference Result 89 states and 99 transitions. [2018-01-21 00:45:03,123 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-01-21 00:45:03,124 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 41 [2018-01-21 00:45:03,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 00:45:03,125 INFO L225 Difference]: With dead ends: 89 [2018-01-21 00:45:03,125 INFO L226 Difference]: Without dead ends: 72 [2018-01-21 00:45:03,126 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 [2018-01-21 00:45:03,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2018-01-21 00:45:03,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 57. [2018-01-21 00:45:03,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-01-21 00:45:03,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 62 transitions. [2018-01-21 00:45:03,134 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 62 transitions. Word has length 41 [2018-01-21 00:45:03,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 00:45:03,134 INFO L432 AbstractCegarLoop]: Abstraction has 57 states and 62 transitions. [2018-01-21 00:45:03,134 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-21 00:45:03,134 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 62 transitions. [2018-01-21 00:45:03,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-01-21 00:45:03,135 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 00:45:03,135 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] [2018-01-21 00:45:03,136 INFO L371 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 00:45:03,136 INFO L82 PathProgramCache]: Analyzing trace with hash 936865683, now seen corresponding path program 3 times [2018-01-21 00:45:03,136 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 00:45:03,137 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:45:03,137 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-21 00:45:03,137 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:45:03,137 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 00:45:03,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 00:45:03,159 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 00:45:03,215 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2018-01-21 00:45:03,215 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 00:45:03,215 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-21 00:45:03,215 INFO L183 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-01-21 00:45:03,216 INFO L434 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-01-21 00:45:03,216 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 00:45:03,216 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 [2018-01-21 00:45:03,223 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-21 00:45:03,223 INFO L280 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-01-21 00:45:03,234 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-21 00:45:03,250 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-21 00:45:03,254 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-21 00:45:03,255 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-21 00:45:03,258 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-21 00:45:03,273 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2018-01-21 00:45:03,273 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-21 00:45:03,307 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2018-01-21 00:45:03,328 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 00:45:03,328 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 [2018-01-21 00:45:03,332 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-21 00:45:03,332 INFO L280 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-01-21 00:45:03,345 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-21 00:45:03,353 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-21 00:45:03,367 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-21 00:45:03,375 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-21 00:45:03,379 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-21 00:45:03,385 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2018-01-21 00:45:03,385 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-21 00:45:03,412 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2018-01-21 00:45:03,414 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-01-21 00:45:03,414 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5] total 9 [2018-01-21 00:45:03,414 INFO L247 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-01-21 00:45:03,414 INFO L409 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-01-21 00:45:03,414 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-01-21 00:45:03,415 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-01-21 00:45:03,415 INFO L87 Difference]: Start difference. First operand 57 states and 62 transitions. Second operand 6 states. [2018-01-21 00:45:03,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 00:45:03,475 INFO L93 Difference]: Finished difference Result 107 states and 120 transitions. [2018-01-21 00:45:03,475 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-21 00:45:03,475 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 62 [2018-01-21 00:45:03,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 00:45:03,476 INFO L225 Difference]: With dead ends: 107 [2018-01-21 00:45:03,477 INFO L226 Difference]: Without dead ends: 86 [2018-01-21 00:45:03,477 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 [2018-01-21 00:45:03,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2018-01-21 00:45:03,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 66. [2018-01-21 00:45:03,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-01-21 00:45:03,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 73 transitions. [2018-01-21 00:45:03,484 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 73 transitions. Word has length 62 [2018-01-21 00:45:03,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 00:45:03,484 INFO L432 AbstractCegarLoop]: Abstraction has 66 states and 73 transitions. [2018-01-21 00:45:03,484 INFO L433 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-01-21 00:45:03,484 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 73 transitions. [2018-01-21 00:45:03,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2018-01-21 00:45:03,486 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 00:45:03,486 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] [2018-01-21 00:45:03,486 INFO L371 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 00:45:03,486 INFO L82 PathProgramCache]: Analyzing trace with hash 1345357476, now seen corresponding path program 4 times [2018-01-21 00:45:03,486 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 00:45:03,487 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:45:03,487 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-21 00:45:03,487 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:45:03,487 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 00:45:03,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 00:45:03,510 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 00:45:03,587 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2018-01-21 00:45:03,587 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 00:45:03,587 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-21 00:45:03,588 INFO L183 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-01-21 00:45:03,588 INFO L434 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-01-21 00:45:03,588 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 00:45:03,588 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 [2018-01-21 00:45:03,599 INFO L101 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-01-21 00:45:03,599 INFO L280 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-01-21 00:45:03,625 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-21 00:45:03,629 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-21 00:45:03,738 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 118 proven. 9 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2018-01-21 00:45:03,739 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-21 00:45:03,927 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 50 proven. 42 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2018-01-21 00:45:03,948 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 00:45:03,949 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 [2018-01-21 00:45:03,952 INFO L101 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-01-21 00:45:03,952 INFO L280 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-01-21 00:45:03,988 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-21 00:45:03,993 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-21 00:45:04,010 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 118 proven. 9 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2018-01-21 00:45:04,010 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-21 00:45:04,146 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 50 proven. 42 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2018-01-21 00:45:04,148 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-01-21 00:45:04,148 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8, 8, 8] total 15 [2018-01-21 00:45:04,148 INFO L247 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-01-21 00:45:04,149 INFO L409 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-01-21 00:45:04,149 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-01-21 00:45:04,149 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2018-01-21 00:45:04,149 INFO L87 Difference]: Start difference. First operand 66 states and 73 transitions. Second operand 12 states. [2018-01-21 00:45:04,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 00:45:04,325 INFO L93 Difference]: Finished difference Result 185 states and 209 transitions. [2018-01-21 00:45:04,325 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-01-21 00:45:04,326 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 83 [2018-01-21 00:45:04,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 00:45:04,327 INFO L225 Difference]: With dead ends: 185 [2018-01-21 00:45:04,328 INFO L226 Difference]: Without dead ends: 135 [2018-01-21 00:45:04,329 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 [2018-01-21 00:45:04,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2018-01-21 00:45:04,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 96. [2018-01-21 00:45:04,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2018-01-21 00:45:04,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 106 transitions. [2018-01-21 00:45:04,340 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 106 transitions. Word has length 83 [2018-01-21 00:45:04,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 00:45:04,340 INFO L432 AbstractCegarLoop]: Abstraction has 96 states and 106 transitions. [2018-01-21 00:45:04,341 INFO L433 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-01-21 00:45:04,341 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 106 transitions. [2018-01-21 00:45:04,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2018-01-21 00:45:04,343 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 00:45:04,344 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] [2018-01-21 00:45:04,344 INFO L371 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 00:45:04,344 INFO L82 PathProgramCache]: Analyzing trace with hash -389182277, now seen corresponding path program 5 times [2018-01-21 00:45:04,344 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 00:45:04,345 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:45:04,345 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-21 00:45:04,345 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:45:04,346 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 00:45:04,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 00:45:04,375 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 00:45:04,490 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 399 trivial. 0 not checked. [2018-01-21 00:45:04,491 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 00:45:04,521 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-21 00:45:04,521 INFO L183 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-01-21 00:45:04,521 INFO L434 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-01-21 00:45:04,521 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 00:45:04,521 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 [2018-01-21 00:45:04,528 INFO L101 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-01-21 00:45:04,529 INFO L280 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder INSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-01-21 00:45:04,541 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-21 00:45:04,544 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-21 00:45:04,551 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-21 00:45:04,557 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-21 00:45:04,563 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-21 00:45:04,565 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-21 00:45:04,569 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-21 00:45:04,752 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 270 proven. 118 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2018-01-21 00:45:04,752 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-21 00:45:04,995 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 105 proven. 218 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2018-01-21 00:45:05,030 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 00:45:05,030 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 [2018-01-21 00:45:05,035 INFO L101 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-01-21 00:45:05,035 INFO L280 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder INSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-01-21 00:45:05,049 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-21 00:45:05,054 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-21 00:45:05,066 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-21 00:45:05,086 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-21 00:45:05,109 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-21 00:45:05,122 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-21 00:45:05,128 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-21 00:45:05,173 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 302 proven. 95 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2018-01-21 00:45:05,173 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-21 00:45:05,419 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 142 proven. 207 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2018-01-21 00:45:05,421 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-01-21 00:45:05,421 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 13, 13, 13, 13] total 29 [2018-01-21 00:45:05,421 INFO L247 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-01-21 00:45:05,422 INFO L409 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-01-21 00:45:05,422 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-01-21 00:45:05,422 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=688, Unknown=0, NotChecked=0, Total=812 [2018-01-21 00:45:05,422 INFO L87 Difference]: Start difference. First operand 96 states and 106 transitions. Second operand 18 states. [2018-01-21 00:45:05,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 00:45:05,908 INFO L93 Difference]: Finished difference Result 234 states and 263 transitions. [2018-01-21 00:45:05,908 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-01-21 00:45:05,908 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 119 [2018-01-21 00:45:05,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 00:45:05,910 INFO L225 Difference]: With dead ends: 234 [2018-01-21 00:45:05,910 INFO L226 Difference]: Without dead ends: 172 [2018-01-21 00:45:05,912 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 499 GetRequests, 445 SyntacticMatches, 13 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 519 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=316, Invalid=1490, Unknown=0, NotChecked=0, Total=1806 [2018-01-21 00:45:05,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2018-01-21 00:45:05,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 131. [2018-01-21 00:45:05,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2018-01-21 00:45:05,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 145 transitions. [2018-01-21 00:45:05,936 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 145 transitions. Word has length 119 [2018-01-21 00:45:05,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 00:45:05,936 INFO L432 AbstractCegarLoop]: Abstraction has 131 states and 145 transitions. [2018-01-21 00:45:05,936 INFO L433 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-01-21 00:45:05,936 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 145 transitions. [2018-01-21 00:45:05,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2018-01-21 00:45:05,940 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 00:45:05,940 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] [2018-01-21 00:45:05,940 INFO L371 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 00:45:05,940 INFO L82 PathProgramCache]: Analyzing trace with hash 349526166, now seen corresponding path program 6 times [2018-01-21 00:45:05,940 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 00:45:05,941 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:45:05,942 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-21 00:45:05,942 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:45:05,942 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 00:45:05,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 00:45:05,978 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 00:45:06,131 INFO L134 CoverageAnalysis]: Checked inductivity of 970 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 910 trivial. 0 not checked. [2018-01-21 00:45:06,131 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 00:45:06,131 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-21 00:45:06,131 INFO L183 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-01-21 00:45:06,131 INFO L434 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-01-21 00:45:06,131 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 00:45:06,131 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 [2018-01-21 00:45:06,136 INFO L101 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-01-21 00:45:06,136 INFO L280 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder MIX_INSIDE_OUTSIDE (IT: FPandBP) [2018-01-21 00:45:06,148 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-21 00:45:06,152 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-21 00:45:06,156 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-21 00:45:06,158 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-21 00:45:06,162 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-21 00:45:06,166 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-21 00:45:06,171 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-21 00:45:06,176 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-21 00:45:06,183 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-21 00:45:06,185 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-21 00:45:06,188 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-21 00:45:06,234 INFO L134 CoverageAnalysis]: Checked inductivity of 970 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 910 trivial. 0 not checked. [2018-01-21 00:45:06,234 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-21 00:45:06,303 INFO L134 CoverageAnalysis]: Checked inductivity of 970 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 910 trivial. 0 not checked. [2018-01-21 00:45:06,324 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 00:45:06,324 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 [2018-01-21 00:45:06,327 INFO L101 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-01-21 00:45:06,328 INFO L280 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder MIX_INSIDE_OUTSIDE (IT: FPandBP) [2018-01-21 00:45:06,342 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-21 00:45:06,358 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-21 00:45:06,377 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-21 00:45:06,398 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-21 00:45:06,431 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-21 00:45:06,465 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-21 00:45:06,505 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-21 00:45:06,615 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-21 00:45:06,819 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-21 00:45:06,844 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-21 00:45:06,850 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-21 00:45:06,866 INFO L134 CoverageAnalysis]: Checked inductivity of 970 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 910 trivial. 0 not checked. [2018-01-21 00:45:06,866 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-21 00:45:06,903 INFO L134 CoverageAnalysis]: Checked inductivity of 970 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 910 trivial. 0 not checked. [2018-01-21 00:45:06,905 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-01-21 00:45:06,906 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8] total 15 [2018-01-21 00:45:06,906 INFO L247 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-01-21 00:45:06,906 INFO L409 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-01-21 00:45:06,906 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-01-21 00:45:06,907 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-01-21 00:45:06,907 INFO L87 Difference]: Start difference. First operand 131 states and 145 transitions. Second operand 9 states. [2018-01-21 00:45:07,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 00:45:07,002 INFO L93 Difference]: Finished difference Result 208 states and 233 transitions. [2018-01-21 00:45:07,002 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-01-21 00:45:07,002 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 160 [2018-01-21 00:45:07,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 00:45:07,004 INFO L225 Difference]: With dead ends: 208 [2018-01-21 00:45:07,004 INFO L226 Difference]: Without dead ends: 175 [2018-01-21 00:45:07,004 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 646 GetRequests, 633 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-01-21 00:45:07,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2018-01-21 00:45:07,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 140. [2018-01-21 00:45:07,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2018-01-21 00:45:07,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 156 transitions. [2018-01-21 00:45:07,017 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 156 transitions. Word has length 160 [2018-01-21 00:45:07,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 00:45:07,018 INFO L432 AbstractCegarLoop]: Abstraction has 140 states and 156 transitions. [2018-01-21 00:45:07,018 INFO L433 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-01-21 00:45:07,018 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 156 transitions. [2018-01-21 00:45:07,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2018-01-21 00:45:07,021 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 00:45:07,021 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] [2018-01-21 00:45:07,021 INFO L371 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 00:45:07,021 INFO L82 PathProgramCache]: Analyzing trace with hash -1727385407, now seen corresponding path program 7 times [2018-01-21 00:45:07,022 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 00:45:07,022 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:45:07,023 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-21 00:45:07,023 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:45:07,023 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 00:45:07,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 00:45:07,054 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 00:45:07,273 INFO L134 CoverageAnalysis]: Checked inductivity of 1479 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 1392 trivial. 0 not checked. [2018-01-21 00:45:07,273 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 00:45:07,273 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-21 00:45:07,273 INFO L183 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-01-21 00:45:07,273 INFO L434 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-01-21 00:45:07,273 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 00:45:07,274 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) [2018-01-21 00:45:07,288 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 00:45:07,288 INFO L280 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-21 00:45:07,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 00:45:07,345 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-21 00:45:07,526 INFO L134 CoverageAnalysis]: Checked inductivity of 1479 backedges. 995 proven. 38 refuted. 0 times theorem prover too weak. 446 trivial. 0 not checked. [2018-01-21 00:45:07,526 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-21 00:45:07,731 INFO L134 CoverageAnalysis]: Checked inductivity of 1479 backedges. 311 proven. 240 refuted. 0 times theorem prover too weak. 928 trivial. 0 not checked. [2018-01-21 00:45:07,752 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 00:45:07,752 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 [2018-01-21 00:45:07,755 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 00:45:07,755 INFO L280 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-01-21 00:45:07,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 00:45:07,836 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-21 00:45:07,859 INFO L134 CoverageAnalysis]: Checked inductivity of 1479 backedges. 995 proven. 38 refuted. 0 times theorem prover too weak. 446 trivial. 0 not checked. [2018-01-21 00:45:07,859 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-21 00:45:08,027 INFO L134 CoverageAnalysis]: Checked inductivity of 1479 backedges. 311 proven. 240 refuted. 0 times theorem prover too weak. 928 trivial. 0 not checked. [2018-01-21 00:45:08,029 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-01-21 00:45:08,029 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12, 12, 12, 12] total 24 [2018-01-21 00:45:08,029 INFO L247 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-01-21 00:45:08,029 INFO L409 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-01-21 00:45:08,029 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-01-21 00:45:08,030 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2018-01-21 00:45:08,030 INFO L87 Difference]: Start difference. First operand 140 states and 156 transitions. Second operand 19 states. [2018-01-21 00:45:08,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 00:45:08,351 INFO L93 Difference]: Finished difference Result 363 states and 408 transitions. [2018-01-21 00:45:08,351 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-01-21 00:45:08,351 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 191 [2018-01-21 00:45:08,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 00:45:08,353 INFO L225 Difference]: With dead ends: 363 [2018-01-21 00:45:08,353 INFO L226 Difference]: Without dead ends: 280 [2018-01-21 00:45:08,354 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 [2018-01-21 00:45:08,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2018-01-21 00:45:08,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 180. [2018-01-21 00:45:08,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2018-01-21 00:45:08,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 201 transitions. [2018-01-21 00:45:08,368 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 201 transitions. Word has length 191 [2018-01-21 00:45:08,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 00:45:08,369 INFO L432 AbstractCegarLoop]: Abstraction has 180 states and 201 transitions. [2018-01-21 00:45:08,369 INFO L433 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-01-21 00:45:08,369 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 201 transitions. [2018-01-21 00:45:08,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2018-01-21 00:45:08,371 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 00:45:08,371 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] [2018-01-21 00:45:08,371 INFO L371 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 00:45:08,372 INFO L82 PathProgramCache]: Analyzing trace with hash 927615722, now seen corresponding path program 8 times [2018-01-21 00:45:08,372 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 00:45:08,372 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:45:08,372 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 00:45:08,372 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:45:08,373 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 00:45:08,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 00:45:08,404 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 00:45:08,606 INFO L134 CoverageAnalysis]: Checked inductivity of 2681 backedges. 0 proven. 119 refuted. 0 times theorem prover too weak. 2562 trivial. 0 not checked. [2018-01-21 00:45:08,606 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 00:45:08,606 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-21 00:45:08,606 INFO L183 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-01-21 00:45:08,606 INFO L434 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-01-21 00:45:08,607 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 00:45:08,607 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 [2018-01-21 00:45:08,613 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-21 00:45:08,613 INFO L280 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-01-21 00:45:08,633 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-21 00:45:08,661 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-21 00:45:08,666 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-21 00:45:08,670 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-21 00:45:08,814 INFO L134 CoverageAnalysis]: Checked inductivity of 2681 backedges. 1730 proven. 60 refuted. 0 times theorem prover too weak. 891 trivial. 0 not checked. [2018-01-21 00:45:08,814 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-21 00:45:09,122 INFO L134 CoverageAnalysis]: Checked inductivity of 2681 backedges. 544 proven. 360 refuted. 0 times theorem prover too weak. 1777 trivial. 0 not checked. [2018-01-21 00:45:09,144 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 00:45:09,144 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 [2018-01-21 00:45:09,147 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-21 00:45:09,147 INFO L280 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-01-21 00:45:09,167 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-21 00:45:09,214 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-21 00:45:09,250 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-21 00:45:09,258 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-21 00:45:09,312 INFO L134 CoverageAnalysis]: Checked inductivity of 2681 backedges. 1730 proven. 60 refuted. 0 times theorem prover too weak. 891 trivial. 0 not checked. [2018-01-21 00:45:09,312 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-21 00:45:09,497 INFO L134 CoverageAnalysis]: Checked inductivity of 2681 backedges. 544 proven. 360 refuted. 0 times theorem prover too weak. 1777 trivial. 0 not checked. [2018-01-21 00:45:09,523 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-01-21 00:45:09,523 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14, 14, 14, 14] total 28 [2018-01-21 00:45:09,523 INFO L247 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-01-21 00:45:09,523 INFO L409 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-01-21 00:45:09,523 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-01-21 00:45:09,524 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=607, Unknown=0, NotChecked=0, Total=756 [2018-01-21 00:45:09,524 INFO L87 Difference]: Start difference. First operand 180 states and 201 transitions. Second operand 22 states. [2018-01-21 00:45:09,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 00:45:09,932 INFO L93 Difference]: Finished difference Result 460 states and 516 transitions. [2018-01-21 00:45:09,932 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-01-21 00:45:09,932 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 242 [2018-01-21 00:45:09,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 00:45:09,934 INFO L225 Difference]: With dead ends: 460 [2018-01-21 00:45:09,935 INFO L226 Difference]: Without dead ends: 365 [2018-01-21 00:45:09,935 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 989 GetRequests, 936 SyntacticMatches, 14 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=316, Invalid=1324, Unknown=0, NotChecked=0, Total=1640 [2018-01-21 00:45:09,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2018-01-21 00:45:09,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 225. [2018-01-21 00:45:09,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 225 states. [2018-01-21 00:45:09,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 252 transitions. [2018-01-21 00:45:09,950 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 252 transitions. Word has length 242 [2018-01-21 00:45:09,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 00:45:09,950 INFO L432 AbstractCegarLoop]: Abstraction has 225 states and 252 transitions. [2018-01-21 00:45:09,950 INFO L433 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-01-21 00:45:09,950 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 252 transitions. [2018-01-21 00:45:09,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 299 [2018-01-21 00:45:09,955 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 00:45:09,955 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] [2018-01-21 00:45:09,955 INFO L371 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 00:45:09,956 INFO L82 PathProgramCache]: Analyzing trace with hash -965692109, now seen corresponding path program 9 times [2018-01-21 00:45:09,956 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 00:45:09,957 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:45:09,957 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-21 00:45:09,957 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:45:09,957 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 00:45:09,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 00:45:09,997 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 00:45:10,290 INFO L134 CoverageAnalysis]: Checked inductivity of 4447 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 4291 trivial. 0 not checked. [2018-01-21 00:45:10,290 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 00:45:10,290 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-21 00:45:10,290 INFO L183 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-01-21 00:45:10,290 INFO L434 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-01-21 00:45:10,291 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 00:45:10,291 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 [2018-01-21 00:45:10,296 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-21 00:45:10,296 INFO L280 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-01-21 00:45:10,321 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-21 00:45:10,324 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-21 00:45:10,328 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-21 00:45:10,331 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-21 00:45:10,344 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-21 00:45:10,349 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-21 00:45:10,354 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-21 00:45:10,358 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-21 00:45:10,359 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-21 00:45:10,364 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-21 00:45:10,517 INFO L134 CoverageAnalysis]: Checked inductivity of 4447 backedges. 1173 proven. 87 refuted. 0 times theorem prover too weak. 3187 trivial. 0 not checked. [2018-01-21 00:45:10,517 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-21 00:45:10,935 INFO L134 CoverageAnalysis]: Checked inductivity of 4447 backedges. 1173 proven. 87 refuted. 0 times theorem prover too weak. 3187 trivial. 0 not checked. [2018-01-21 00:45:10,957 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 00:45:10,957 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 [2018-01-21 00:45:10,960 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-21 00:45:10,961 INFO L280 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-01-21 00:45:10,991 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-21 00:45:11,000 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-21 00:45:11,017 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-21 00:45:11,039 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-21 00:45:11,078 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-21 00:45:11,151 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-21 00:45:11,280 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-21 00:45:11,524 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-21 00:45:11,548 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-21 00:45:11,558 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-21 00:45:11,615 INFO L134 CoverageAnalysis]: Checked inductivity of 4447 backedges. 1173 proven. 87 refuted. 0 times theorem prover too weak. 3187 trivial. 0 not checked. [2018-01-21 00:45:11,615 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-21 00:45:11,801 INFO L134 CoverageAnalysis]: Checked inductivity of 4447 backedges. 1173 proven. 87 refuted. 0 times theorem prover too weak. 3187 trivial. 0 not checked. [2018-01-21 00:45:11,803 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-01-21 00:45:11,803 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12, 12, 12] total 29 [2018-01-21 00:45:11,803 INFO L247 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-01-21 00:45:11,804 INFO L409 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-01-21 00:45:11,804 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-01-21 00:45:11,804 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=596, Unknown=0, NotChecked=0, Total=812 [2018-01-21 00:45:11,804 INFO L87 Difference]: Start difference. First operand 225 states and 252 transitions. Second operand 19 states. [2018-01-21 00:45:12,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 00:45:12,120 INFO L93 Difference]: Finished difference Result 535 states and 610 transitions. [2018-01-21 00:45:12,121 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-01-21 00:45:12,121 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 298 [2018-01-21 00:45:12,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 00:45:12,124 INFO L225 Difference]: With dead ends: 535 [2018-01-21 00:45:12,125 INFO L226 Difference]: Without dead ends: 490 [2018-01-21 00:45:12,126 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 [2018-01-21 00:45:12,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2018-01-21 00:45:12,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 283. [2018-01-21 00:45:12,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 283 states. [2018-01-21 00:45:12,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 322 transitions. [2018-01-21 00:45:12,149 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 322 transitions. Word has length 298 [2018-01-21 00:45:12,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 00:45:12,150 INFO L432 AbstractCegarLoop]: Abstraction has 283 states and 322 transitions. [2018-01-21 00:45:12,150 INFO L433 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-01-21 00:45:12,150 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 322 transitions. [2018-01-21 00:45:12,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 360 [2018-01-21 00:45:12,153 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 00:45:12,153 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] [2018-01-21 00:45:12,153 INFO L371 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 00:45:12,154 INFO L82 PathProgramCache]: Analyzing trace with hash -1850454344, now seen corresponding path program 10 times [2018-01-21 00:45:12,154 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 00:45:12,155 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:45:12,155 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-21 00:45:12,155 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:45:12,155 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 00:45:12,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 00:45:12,209 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 00:45:12,589 INFO L134 CoverageAnalysis]: Checked inductivity of 6918 backedges. 0 proven. 198 refuted. 0 times theorem prover too weak. 6720 trivial. 0 not checked. [2018-01-21 00:45:12,590 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 00:45:12,590 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-21 00:45:12,590 INFO L183 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-01-21 00:45:12,590 INFO L434 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-01-21 00:45:12,590 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 00:45:12,590 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 [2018-01-21 00:45:12,596 INFO L101 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-01-21 00:45:12,596 INFO L280 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-01-21 00:45:12,685 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-21 00:45:12,693 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-21 00:45:13,017 INFO L134 CoverageAnalysis]: Checked inductivity of 6918 backedges. 4094 proven. 119 refuted. 0 times theorem prover too weak. 2705 trivial. 0 not checked. [2018-01-21 00:45:13,017 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-21 00:45:13,519 INFO L134 CoverageAnalysis]: Checked inductivity of 6918 backedges. 1298 proven. 675 refuted. 0 times theorem prover too weak. 4945 trivial. 0 not checked. [2018-01-21 00:45:13,539 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 00:45:13,539 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 [2018-01-21 00:45:13,542 INFO L101 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-01-21 00:45:13,542 INFO L280 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-01-21 00:45:13,659 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-21 00:45:13,669 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-21 00:45:13,733 INFO L134 CoverageAnalysis]: Checked inductivity of 6918 backedges. 4094 proven. 119 refuted. 0 times theorem prover too weak. 2705 trivial. 0 not checked. [2018-01-21 00:45:13,733 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-21 00:45:13,982 INFO L134 CoverageAnalysis]: Checked inductivity of 6918 backedges. 1298 proven. 675 refuted. 0 times theorem prover too weak. 4945 trivial. 0 not checked. [2018-01-21 00:45:13,984 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-01-21 00:45:13,984 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 18, 18, 18, 18] total 36 [2018-01-21 00:45:13,984 INFO L247 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-01-21 00:45:13,985 INFO L409 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-01-21 00:45:13,985 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-01-21 00:45:13,985 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=1024, Unknown=0, NotChecked=0, Total=1260 [2018-01-21 00:45:13,985 INFO L87 Difference]: Start difference. First operand 283 states and 322 transitions. Second operand 28 states. [2018-01-21 00:45:14,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 00:45:14,869 INFO L93 Difference]: Finished difference Result 722 states and 827 transitions. [2018-01-21 00:45:14,869 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-01-21 00:45:14,869 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 359 [2018-01-21 00:45:14,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 00:45:14,873 INFO L225 Difference]: With dead ends: 722 [2018-01-21 00:45:14,873 INFO L226 Difference]: Without dead ends: 593 [2018-01-21 00:45:14,875 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 1463 GetRequests, 1394 SyntacticMatches, 18 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 893 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=505, Invalid=2251, Unknown=0, NotChecked=0, Total=2756 [2018-01-21 00:45:14,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 593 states. [2018-01-21 00:45:14,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 593 to 338. [2018-01-21 00:45:14,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 338 states. [2018-01-21 00:45:14,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 382 transitions. [2018-01-21 00:45:14,900 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 382 transitions. Word has length 359 [2018-01-21 00:45:14,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 00:45:14,901 INFO L432 AbstractCegarLoop]: Abstraction has 338 states and 382 transitions. [2018-01-21 00:45:14,901 INFO L433 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-01-21 00:45:14,901 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 382 transitions. [2018-01-21 00:45:14,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 421 [2018-01-21 00:45:14,904 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 00:45:14,904 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] [2018-01-21 00:45:14,904 INFO L371 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 00:45:14,904 INFO L82 PathProgramCache]: Analyzing trace with hash 1447339731, now seen corresponding path program 11 times [2018-01-21 00:45:14,904 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 00:45:14,905 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:45:14,905 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-21 00:45:14,905 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:45:14,905 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 00:45:14,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 00:45:14,947 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 00:45:15,270 INFO L134 CoverageAnalysis]: Checked inductivity of 9940 backedges. 0 proven. 245 refuted. 0 times theorem prover too weak. 9695 trivial. 0 not checked. [2018-01-21 00:45:15,271 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 00:45:15,271 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-21 00:45:15,271 INFO L183 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-01-21 00:45:15,271 INFO L434 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-01-21 00:45:15,271 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 00:45:15,271 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 [2018-01-21 00:45:15,284 INFO L101 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-01-21 00:45:15,284 INFO L280 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder INSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-01-21 00:45:15,309 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-21 00:45:15,325 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-21 00:45:15,340 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-21 00:45:15,356 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-21 00:45:15,373 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-21 00:45:15,385 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-21 00:45:15,395 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-21 00:45:15,401 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-21 00:45:15,407 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-21 00:45:15,408 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-21 00:45:15,414 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-21 00:45:15,705 INFO L134 CoverageAnalysis]: Checked inductivity of 9940 backedges. 5758 proven. 500 refuted. 0 times theorem prover too weak. 3682 trivial. 0 not checked. [2018-01-21 00:45:15,705 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-21 00:45:16,183 INFO L134 CoverageAnalysis]: Checked inductivity of 9940 backedges. 874 proven. 2168 refuted. 0 times theorem prover too weak. 6898 trivial. 0 not checked. [2018-01-21 00:45:16,204 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 00:45:16,204 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 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 [2018-01-21 00:45:16,206 INFO L101 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-01-21 00:45:16,207 INFO L280 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder INSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-01-21 00:45:16,233 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-21 00:45:16,241 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-21 00:45:16,257 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-21 00:45:16,284 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-21 00:45:16,330 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-21 00:45:16,387 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-21 00:45:16,456 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-21 00:45:16,546 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-21 00:45:16,625 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-21 00:45:16,651 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-21 00:45:16,660 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-21 00:45:16,738 INFO L134 CoverageAnalysis]: Checked inductivity of 9940 backedges. 5758 proven. 500 refuted. 0 times theorem prover too weak. 3682 trivial. 0 not checked. [2018-01-21 00:45:16,739 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-21 00:45:17,055 INFO L134 CoverageAnalysis]: Checked inductivity of 9940 backedges. 874 proven. 2168 refuted. 0 times theorem prover too weak. 6898 trivial. 0 not checked. [2018-01-21 00:45:17,057 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-01-21 00:45:17,057 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19, 19, 19, 19] total 40 [2018-01-21 00:45:17,057 INFO L247 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-01-21 00:45:17,058 INFO L409 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-01-21 00:45:17,058 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-01-21 00:45:17,058 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=1326, Unknown=0, NotChecked=0, Total=1560 [2018-01-21 00:45:17,058 INFO L87 Difference]: Start difference. First operand 338 states and 382 transitions. Second operand 30 states. [2018-01-21 00:45:18,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 00:45:18,622 INFO L93 Difference]: Finished difference Result 804 states and 906 transitions. [2018-01-21 00:45:18,622 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-01-21 00:45:18,623 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 420 [2018-01-21 00:45:18,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 00:45:18,626 INFO L225 Difference]: With dead ends: 804 [2018-01-21 00:45:18,626 INFO L226 Difference]: Without dead ends: 458 [2018-01-21 00:45:18,629 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 1730 GetRequests, 1645 SyntacticMatches, 18 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1324 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=764, Invalid=3928, Unknown=0, NotChecked=0, Total=4692 [2018-01-21 00:45:18,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2018-01-21 00:45:18,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 339. [2018-01-21 00:45:18,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 339 states. [2018-01-21 00:45:18,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 376 transitions. [2018-01-21 00:45:18,654 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 376 transitions. Word has length 420 [2018-01-21 00:45:18,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 00:45:18,655 INFO L432 AbstractCegarLoop]: Abstraction has 339 states and 376 transitions. [2018-01-21 00:45:18,655 INFO L433 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-01-21 00:45:18,655 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 376 transitions. [2018-01-21 00:45:18,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 477 [2018-01-21 00:45:18,658 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 00:45:18,659 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] [2018-01-21 00:45:18,659 INFO L371 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 00:45:18,659 INFO L82 PathProgramCache]: Analyzing trace with hash 593814198, now seen corresponding path program 12 times [2018-01-21 00:45:18,659 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 00:45:18,660 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:45:18,660 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-21 00:45:18,660 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:45:18,660 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 00:45:18,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 00:45:18,706 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 00:45:19,184 INFO L134 CoverageAnalysis]: Checked inductivity of 13156 backedges. 0 proven. 297 refuted. 0 times theorem prover too weak. 12859 trivial. 0 not checked. [2018-01-21 00:45:19,184 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 00:45:19,184 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-21 00:45:19,184 INFO L183 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-01-21 00:45:19,184 INFO L434 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-01-21 00:45:19,184 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 00:45:19,184 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 [2018-01-21 00:45:19,191 INFO L101 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-01-21 00:45:19,191 INFO L280 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder MIX_INSIDE_OUTSIDE (IT: FPandBP) [2018-01-21 00:45:19,215 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-21 00:45:19,220 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-21 00:45:19,223 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-21 00:45:19,228 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-21 00:45:19,232 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-21 00:45:19,237 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-21 00:45:19,243 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-21 00:45:19,250 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-21 00:45:19,260 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-21 00:45:19,272 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-21 00:45:19,281 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-21 00:45:19,290 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-21 00:45:19,300 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-21 00:45:19,310 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-21 00:45:19,320 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-21 00:45:19,331 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-21 00:45:19,345 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-21 00:45:19,356 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-21 00:45:19,369 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-21 00:45:19,372 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-21 00:45:19,379 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-21 00:45:19,630 INFO L134 CoverageAnalysis]: Checked inductivity of 13156 backedges. 2730 proven. 156 refuted. 0 times theorem prover too weak. 10270 trivial. 0 not checked. [2018-01-21 00:45:19,630 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-21 00:45:20,148 INFO L134 CoverageAnalysis]: Checked inductivity of 13156 backedges. 2730 proven. 156 refuted. 0 times theorem prover too weak. 10270 trivial. 0 not checked. [2018-01-21 00:45:20,169 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 00:45:20,169 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 [2018-01-21 00:45:20,172 INFO L101 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-01-21 00:45:20,172 INFO L280 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder MIX_INSIDE_OUTSIDE (IT: FPandBP) [2018-01-21 00:45:20,208 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-21 00:45:20,219 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-21 00:45:20,243 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-21 00:45:20,272 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-21 00:45:20,327 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-21 00:45:20,420 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-21 00:45:20,839 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-21 00:45:24,818 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-21 00:45:36,855 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-21 00:45:48,907 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-21 00:46:00,963 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown