java -Xmx6000000000 -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data ./data --generate-csv --csv-dir ../../../releaseScripts/default/UAutomizer-linux/csv -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/ai/eq-bench/mempurity-32bit-Automizer_Taipan+AI_EQ_mostprecise.epf -i ../../../trunk/examples/svcomp/ldv-memsafety/ArraysOfVariableLength_true-valid-memsafety.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-2f49842 [2018-01-21 03:22:52,724 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-21 03:22:52,726 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-21 03:22:52,743 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-21 03:22:52,743 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-21 03:22:52,744 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-21 03:22:52,745 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-21 03:22:52,749 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-21 03:22:52,752 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-21 03:22:52,752 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-21 03:22:52,754 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-01-21 03:22:52,754 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-01-21 03:22:52,755 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-01-21 03:22:52,756 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-01-21 03:22:52,757 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-01-21 03:22:52,759 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-01-21 03:22:52,762 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-01-21 03:22:52,763 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-01-21 03:22:52,765 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-01-21 03:22:52,766 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-01-21 03:22:52,768 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-01-21 03:22:52,774 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-01-21 03:22:52,774 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-01-21 03:22:52,774 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/eq-bench/mempurity-32bit-Automizer_Taipan+AI_EQ_mostprecise.epf [2018-01-21 03:22:52,785 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-21 03:22:52,785 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-21 03:22:52,785 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-21 03:22:52,786 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-21 03:22:52,786 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-21 03:22:52,786 INFO L133 SettingsManager]: * Weq Fattening=true [2018-01-21 03:22:52,786 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-21 03:22:52,786 INFO L133 SettingsManager]: * Precise comparison operator=true [2018-01-21 03:22:52,786 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-21 03:22:52,787 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-21 03:22:52,787 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-21 03:22:52,787 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-21 03:22:52,787 INFO L133 SettingsManager]: * Check allocation purity=true [2018-01-21 03:22:52,787 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-21 03:22:52,787 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-21 03:22:52,787 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-21 03:22:52,788 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-01-21 03:22:52,788 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-21 03:22:52,788 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-01-21 03:22:52,788 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-21 03:22:52,788 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-01-21 03:22:52,788 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-01-21 03:22:52,789 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-21 03:22:52,789 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-01-21 03:22:52,789 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-21 03:22:52,789 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-21 03:22:52,789 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-21 03:22:52,789 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-21 03:22:52,790 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-21 03:22:52,790 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-21 03:22:52,790 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-21 03:22:52,790 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-21 03:22:52,790 INFO L133 SettingsManager]: * Stop after first violation was found=false [2018-01-21 03:22:52,790 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-01-21 03:22:52,790 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-21 03:22:52,790 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-21 03:22:52,791 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-21 03:22:52,791 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-01-21 03:22:52,791 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-21 03:22:52,791 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-21 03:22:52,824 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-21 03:22:52,835 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-21 03:22:52,838 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-21 03:22:52,839 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-21 03:22:52,840 INFO L276 PluginConnector]: CDTParser initialized [2018-01-21 03:22:52,840 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-memsafety/ArraysOfVariableLength_true-valid-memsafety.c [2018-01-21 03:22:52,951 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-21 03:22:52,957 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-21 03:22:52,958 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-21 03:22:52,958 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-21 03:22:52,966 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-21 03:22:52,967 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.01 03:22:52" (1/1) ... [2018-01-21 03:22:52,971 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1d30ea38 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 03:22:52, skipping insertion in model container [2018-01-21 03:22:52,971 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.01 03:22:52" (1/1) ... [2018-01-21 03:22:52,992 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-21 03:22:53,012 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-21 03:22:53,139 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-21 03:22:53,157 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-21 03:22:53,164 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 03:22:53 WrapperNode [2018-01-21 03:22:53,164 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-21 03:22:53,165 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-21 03:22:53,166 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-21 03:22:53,166 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-21 03:22:53,182 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 03:22:53" (1/1) ... [2018-01-21 03:22:53,183 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 03:22:53" (1/1) ... [2018-01-21 03:22:53,193 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 03:22:53" (1/1) ... [2018-01-21 03:22:53,193 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 03:22:53" (1/1) ... [2018-01-21 03:22:53,195 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 03:22:53" (1/1) ... [2018-01-21 03:22:53,199 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 03:22:53" (1/1) ... [2018-01-21 03:22:53,200 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 03:22:53" (1/1) ... [2018-01-21 03:22:53,202 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-21 03:22:53,203 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-21 03:22:53,203 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-21 03:22:53,203 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-21 03:22:53,204 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 03:22:53" (1/1) ... No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-21 03:22:53,261 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-21 03:22:53,262 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-21 03:22:53,262 INFO L136 BoogieDeclarations]: Found implementation of procedure foo [2018-01-21 03:22:53,262 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-21 03:22:53,262 INFO L128 BoogieDeclarations]: Found specification of procedure write~int [2018-01-21 03:22:53,262 INFO L128 BoogieDeclarations]: Found specification of procedure read~int [2018-01-21 03:22:53,262 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-01-21 03:22:53,263 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-01-21 03:22:53,263 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-01-21 03:22:53,263 INFO L128 BoogieDeclarations]: Found specification of procedure foo [2018-01-21 03:22:53,263 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-21 03:22:53,263 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-21 03:22:53,263 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-21 03:22:53,534 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-21 03:22:53,535 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.01 03:22:53 BoogieIcfgContainer [2018-01-21 03:22:53,535 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-21 03:22:53,536 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-01-21 03:22:53,536 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-01-21 03:22:53,537 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-01-21 03:22:53,537 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.01 03:22:52" (1/3) ... [2018-01-21 03:22:53,538 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@daa70cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.01 03:22:53, skipping insertion in model container [2018-01-21 03:22:53,539 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 03:22:53" (2/3) ... [2018-01-21 03:22:53,539 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@daa70cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.01 03:22:53, skipping insertion in model container [2018-01-21 03:22:53,539 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.01 03:22:53" (3/3) ... [2018-01-21 03:22:53,540 INFO L105 eAbstractionObserver]: Analyzing ICFG ArraysOfVariableLength_true-valid-memsafety.c [2018-01-21 03:22:53,547 INFO L130 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-01-21 03:22:53,552 INFO L142 ceAbstractionStarter]: Appying trace abstraction to program that has 4 error locations. [2018-01-21 03:22:53,589 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 03:22:53,589 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 03:22:53,589 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 03:22:53,590 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 03:22:53,590 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 03:22:53,590 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 03:22:53,590 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 03:22:53,590 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.initErr0EnsuresViolation======== [2018-01-21 03:22:53,591 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 03:22:53,612 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2018-01-21 03:22:53,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-01-21 03:22:53,618 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 03:22:53,619 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-01-21 03:22:53,620 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.initErr0EnsuresViolation]=== [2018-01-21 03:22:53,625 INFO L82 PathProgramCache]: Analyzing trace with hash 103790, now seen corresponding path program 1 times [2018-01-21 03:22:53,628 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 03:22:53,674 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:22:53,674 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 03:22:53,674 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:22:53,675 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 03:22:53,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 03:22:53,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 03:22:53,726 INFO L381 BasicCegarLoop]: Counterexample might be feasible [2018-01-21 03:22:53,733 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 03:22:53,739 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 03:22:53,739 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 03:22:53,739 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 03:22:53,739 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 03:22:53,739 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 03:22:53,739 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 03:22:53,739 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 03:22:53,739 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooErr0EnsuresViolation======== [2018-01-21 03:22:53,739 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 03:22:53,741 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2018-01-21 03:22:53,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-01-21 03:22:53,742 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 03:22:53,742 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 03:22:53,742 INFO L371 AbstractCegarLoop]: === Iteration 1 === [fooErr0EnsuresViolation]=== [2018-01-21 03:22:53,742 INFO L82 PathProgramCache]: Analyzing trace with hash -125735921, now seen corresponding path program 1 times [2018-01-21 03:22:53,742 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 03:22:53,743 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:22:53,743 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 03:22:53,744 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:22:53,744 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 03:22:53,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 03:22:53,770 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 03:22:53,796 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-21 03:22:53,798 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 03:22:53,798 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-21 03:22:53,798 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 03:22:53,799 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-21 03:22:53,809 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-21 03:22:53,809 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-21 03:22:53,812 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 2 states. [2018-01-21 03:22:53,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 03:22:53,839 INFO L93 Difference]: Finished difference Result 78 states and 92 transitions. [2018-01-21 03:22:53,840 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-21 03:22:53,841 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 15 [2018-01-21 03:22:53,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 03:22:53,849 INFO L225 Difference]: With dead ends: 78 [2018-01-21 03:22:53,849 INFO L226 Difference]: Without dead ends: 0 [2018-01-21 03:22:53,853 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-21 03:22:53,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-01-21 03:22:53,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-01-21 03:22:53,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-01-21 03:22:53,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-01-21 03:22:53,951 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 15 [2018-01-21 03:22:53,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 03:22:53,952 INFO L432 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-01-21 03:22:53,952 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-21 03:22:53,952 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-01-21 03:22:53,952 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-01-21 03:22:53,954 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 03:22:53,954 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 03:22:53,954 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 03:22:53,954 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 03:22:53,955 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 03:22:53,955 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 03:22:53,955 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 03:22:53,955 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.startErr0EnsuresViolation======== [2018-01-21 03:22:53,955 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 03:22:53,956 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2018-01-21 03:22:53,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-01-21 03:22:53,957 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 03:22:53,957 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 03:22:53,957 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 03:22:53,957 INFO L82 PathProgramCache]: Analyzing trace with hash -1491711838, now seen corresponding path program 1 times [2018-01-21 03:22:53,957 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 03:22:53,958 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:22:53,958 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 03:22:53,959 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:22:53,959 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 03:22:53,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 03:22:53,968 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 03:22:53,979 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-21 03:22:53,979 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 03:22:53,979 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-21 03:22:53,979 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 03:22:53,980 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-21 03:22:53,980 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-21 03:22:53,980 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-21 03:22:53,980 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 2 states. [2018-01-21 03:22:53,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 03:22:53,984 INFO L93 Difference]: Finished difference Result 78 states and 92 transitions. [2018-01-21 03:22:53,984 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-21 03:22:53,984 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 17 [2018-01-21 03:22:53,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 03:22:53,986 INFO L225 Difference]: With dead ends: 78 [2018-01-21 03:22:53,987 INFO L226 Difference]: Without dead ends: 40 [2018-01-21 03:22:53,987 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-21 03:22:53,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-01-21 03:22:53,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2018-01-21 03:22:53,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-01-21 03:22:53,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2018-01-21 03:22:53,998 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 17 [2018-01-21 03:22:53,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 03:22:53,999 INFO L432 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2018-01-21 03:22:53,999 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-21 03:22:53,999 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2018-01-21 03:22:54,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-01-21 03:22:54,000 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 03:22:54,000 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 03:22:54,000 INFO L371 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 03:22:54,000 INFO L82 PathProgramCache]: Analyzing trace with hash -1603848178, now seen corresponding path program 1 times [2018-01-21 03:22:54,000 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 03:22:54,001 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:22:54,001 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 03:22:54,001 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:22:54,002 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 03:22:54,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 03:22:54,051 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 03:22:54,093 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-21 03:22:54,093 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 03:22:54,093 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-21 03:22:54,094 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 03:22:54,095 INFO L409 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-01-21 03:22:54,096 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-01-21 03:22:54,096 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-01-21 03:22:54,096 INFO L87 Difference]: Start difference. First operand 40 states and 43 transitions. Second operand 3 states. [2018-01-21 03:22:54,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 03:22:54,156 INFO L93 Difference]: Finished difference Result 73 states and 81 transitions. [2018-01-21 03:22:54,156 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-01-21 03:22:54,157 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2018-01-21 03:22:54,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 03:22:54,160 INFO L225 Difference]: With dead ends: 73 [2018-01-21 03:22:54,160 INFO L226 Difference]: Without dead ends: 57 [2018-01-21 03:22:54,161 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-01-21 03:22:54,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-01-21 03:22:54,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 44. [2018-01-21 03:22:54,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-01-21 03:22:54,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 47 transitions. [2018-01-21 03:22:54,174 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 47 transitions. Word has length 19 [2018-01-21 03:22:54,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 03:22:54,175 INFO L432 AbstractCegarLoop]: Abstraction has 44 states and 47 transitions. [2018-01-21 03:22:54,175 INFO L433 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-01-21 03:22:54,175 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 47 transitions. [2018-01-21 03:22:54,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-01-21 03:22:54,176 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 03:22:54,176 INFO L322 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 03:22:54,177 INFO L371 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 03:22:54,177 INFO L82 PathProgramCache]: Analyzing trace with hash -428436962, now seen corresponding path program 1 times [2018-01-21 03:22:54,177 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 03:22:54,178 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:22:54,178 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 03:22:54,178 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:22:54,179 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 03:22:54,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 03:22:54,196 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 03:22:54,249 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-21 03:22:54,250 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 03:22:54,250 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-21 03:22:54,251 INFO L199 CegarAbsIntRunner]: Running AI on error trace of length 35 with the following transitions: [2018-01-21 03:22:54,253 INFO L201 CegarAbsIntRunner]: [0], [1], [3], [7], [10], [20], [21], [26], [27], [28], [29], [33], [36], [38], [40], [41], [42], [44], [48], [52], [57], [58], [61], [63], [64], [65], [75], [77], [78], [79], [80], [81], [82] [2018-01-21 03:22:54,302 INFO L147 AbstractInterpreter]: Using domain VPDomain [2018-01-21 03:22:54,302 INFO L101 FixpointEngine]: Starting fixpoint engine with domain VPDomain (maxUnwinding=3, maxParallelStates=2) [2018-01-21 03:22:56,438 INFO L259 AbstractInterpreter]: Some error location(s) were reachable [2018-01-21 03:22:56,440 INFO L268 AbstractInterpreter]: Visited 33 different actions 57 times. Merged at 17 different actions 17 times. Never widened. Found 2 fixpoints after 2 different actions. Largest state had 21 variables. [2018-01-21 03:22:56,482 INFO L434 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-01-21 03:22:56,482 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 03:22:56,482 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-21 03:22:56,493 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 03:22:56,493 INFO L280 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-01-21 03:22:56,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 03:22:56,548 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-21 03:22:56,612 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-21 03:22:56,612 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-21 03:22:56,671 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-21 03:22:56,709 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 03:22:56,709 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 03:22:56,715 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 03:22:56,715 INFO L280 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-01-21 03:22:56,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 03:22:56,761 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-21 03:22:56,768 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-21 03:22:56,768 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-21 03:22:56,807 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-21 03:22:56,810 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-01-21 03:22:56,810 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4] total 7 [2018-01-21 03:22:56,810 INFO L247 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-01-21 03:22:56,811 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-21 03:22:56,811 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-21 03:22:56,811 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-01-21 03:22:56,811 INFO L87 Difference]: Start difference. First operand 44 states and 47 transitions. Second operand 5 states. [2018-01-21 03:22:56,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 03:22:56,893 INFO L93 Difference]: Finished difference Result 92 states and 102 transitions. [2018-01-21 03:22:56,893 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-01-21 03:22:56,893 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 34 [2018-01-21 03:22:56,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 03:22:56,895 INFO L225 Difference]: With dead ends: 92 [2018-01-21 03:22:56,895 INFO L226 Difference]: Without dead ends: 74 [2018-01-21 03:22:56,896 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-01-21 03:22:56,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2018-01-21 03:22:56,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 56. [2018-01-21 03:22:56,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-01-21 03:22:56,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 61 transitions. [2018-01-21 03:22:56,906 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 61 transitions. Word has length 34 [2018-01-21 03:22:56,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 03:22:56,906 INFO L432 AbstractCegarLoop]: Abstraction has 56 states and 61 transitions. [2018-01-21 03:22:56,906 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-21 03:22:56,906 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 61 transitions. [2018-01-21 03:22:56,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-01-21 03:22:56,908 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 03:22:56,909 INFO L322 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 03:22:56,909 INFO L371 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 03:22:56,909 INFO L82 PathProgramCache]: Analyzing trace with hash 284082524, now seen corresponding path program 2 times [2018-01-21 03:22:56,909 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 03:22:56,910 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:22:56,911 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 03:22:56,911 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:22:56,911 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 03:22:56,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 03:22:56,934 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 03:22:57,014 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-01-21 03:22:57,015 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 03:22:57,015 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-21 03:22:57,015 INFO L183 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-01-21 03:22:57,015 INFO L434 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-01-21 03:22:57,016 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 03:22:57,016 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 03:22:57,049 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-21 03:22:57,049 INFO L280 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-01-21 03:22:57,063 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-21 03:22:57,075 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-21 03:22:57,088 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-21 03:22:57,093 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-21 03:22:57,194 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-01-21 03:22:57,195 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-21 03:22:57,347 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-01-21 03:22:57,384 INFO L320 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-01-21 03:22:57,384 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [5] total 10 [2018-01-21 03:22:57,384 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 03:22:57,384 INFO L409 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-01-21 03:22:57,385 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-01-21 03:22:57,385 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2018-01-21 03:22:57,385 INFO L87 Difference]: Start difference. First operand 56 states and 61 transitions. Second operand 6 states. [2018-01-21 03:22:57,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 03:22:57,536 INFO L93 Difference]: Finished difference Result 108 states and 119 transitions. [2018-01-21 03:22:57,537 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-01-21 03:22:57,537 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 47 [2018-01-21 03:22:57,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 03:22:57,538 INFO L225 Difference]: With dead ends: 108 [2018-01-21 03:22:57,538 INFO L226 Difference]: Without dead ends: 69 [2018-01-21 03:22:57,539 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 86 SyntacticMatches, 4 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2018-01-21 03:22:57,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-01-21 03:22:57,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 61. [2018-01-21 03:22:57,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-01-21 03:22:57,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 67 transitions. [2018-01-21 03:22:57,546 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 67 transitions. Word has length 47 [2018-01-21 03:22:57,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 03:22:57,547 INFO L432 AbstractCegarLoop]: Abstraction has 61 states and 67 transitions. [2018-01-21 03:22:57,547 INFO L433 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-01-21 03:22:57,547 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 67 transitions. [2018-01-21 03:22:57,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-01-21 03:22:57,548 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 03:22:57,549 INFO L322 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 03:22:57,549 INFO L371 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 03:22:57,549 INFO L82 PathProgramCache]: Analyzing trace with hash -1139762048, now seen corresponding path program 1 times [2018-01-21 03:22:57,549 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 03:22:57,550 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:22:57,550 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-21 03:22:57,550 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:22:57,551 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 03:22:57,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 03:22:57,571 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 03:22:57,626 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-01-21 03:22:57,627 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 03:22:57,627 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-21 03:22:57,627 INFO L199 CegarAbsIntRunner]: Running AI on error trace of length 53 with the following transitions: [2018-01-21 03:22:57,627 INFO L201 CegarAbsIntRunner]: [0], [1], [3], [7], [10], [12], [13], [14], [16], [20], [21], [26], [27], [28], [29], [33], [36], [38], [40], [41], [42], [44], [48], [52], [57], [58], [61], [63], [64], [65], [75], [77], [78], [79], [80], [81], [82] [2018-01-21 03:22:57,629 INFO L147 AbstractInterpreter]: Using domain VPDomain [2018-01-21 03:22:57,629 INFO L101 FixpointEngine]: Starting fixpoint engine with domain VPDomain (maxUnwinding=3, maxParallelStates=2) [2018-01-21 03:22:59,062 INFO L259 AbstractInterpreter]: Some error location(s) were reachable [2018-01-21 03:22:59,964 INFO L268 AbstractInterpreter]: Visited 37 different actions 91 times. Merged at 25 different actions 41 times. Never widened. Found 6 fixpoints after 3 different actions. Largest state had 23 variables. [2018-01-21 03:22:59,971 INFO L434 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-01-21 03:22:59,971 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 03:22:59,971 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-21 03:22:59,981 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 03:22:59,981 INFO L280 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-01-21 03:23:00,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 03:23:00,011 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-21 03:23:00,050 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-01-21 03:23:00,050 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-21 03:23:00,103 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-01-21 03:23:00,125 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 03:23:00,125 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 6 with cvc4 --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with cvc4 --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-01-21 03:23:00,129 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 03:23:00,129 INFO L280 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-01-21 03:23:00,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 03:23:00,182 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-21 03:23:00,191 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-01-21 03:23:00,192 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-21 03:23:00,218 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-01-21 03:23:00,220 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-01-21 03:23:00,220 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5] total 9 [2018-01-21 03:23:00,220 INFO L247 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-01-21 03:23:00,221 INFO L409 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-01-21 03:23:00,221 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-01-21 03:23:00,221 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-01-21 03:23:00,221 INFO L87 Difference]: Start difference. First operand 61 states and 67 transitions. Second operand 6 states. [2018-01-21 03:23:00,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 03:23:00,372 INFO L93 Difference]: Finished difference Result 119 states and 133 transitions. [2018-01-21 03:23:00,373 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-21 03:23:00,373 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 52 [2018-01-21 03:23:00,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 03:23:00,375 INFO L225 Difference]: With dead ends: 119 [2018-01-21 03:23:00,375 INFO L226 Difference]: Without dead ends: 96 [2018-01-21 03:23:00,376 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 204 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 03:23:00,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2018-01-21 03:23:00,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 73. [2018-01-21 03:23:00,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-01-21 03:23:00,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 81 transitions. [2018-01-21 03:23:00,386 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 81 transitions. Word has length 52 [2018-01-21 03:23:00,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 03:23:00,386 INFO L432 AbstractCegarLoop]: Abstraction has 73 states and 81 transitions. [2018-01-21 03:23:00,387 INFO L433 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-01-21 03:23:00,387 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 81 transitions. [2018-01-21 03:23:00,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-01-21 03:23:00,388 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 03:23:00,388 INFO L322 BasicCegarLoop]: trace histogram [5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 03:23:00,388 INFO L371 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 03:23:00,388 INFO L82 PathProgramCache]: Analyzing trace with hash -2110418334, now seen corresponding path program 2 times [2018-01-21 03:23:00,388 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 03:23:00,389 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:23:00,389 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 03:23:00,390 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:23:00,390 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 03:23:00,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 03:23:00,412 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 03:23:00,502 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2018-01-21 03:23:00,502 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 03:23:00,502 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-21 03:23:00,502 INFO L183 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-01-21 03:23:00,502 INFO L434 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-01-21 03:23:00,502 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 03:23:00,502 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-21 03:23:00,511 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-21 03:23:00,511 INFO L280 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-01-21 03:23:00,526 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-21 03:23:00,540 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-21 03:23:00,543 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-21 03:23:00,547 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-21 03:23:00,626 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 48 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2018-01-21 03:23:00,626 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-21 03:23:00,806 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 48 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2018-01-21 03:23:00,827 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 03:23:00,828 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 8 with cvc4 --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with cvc4 --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-01-21 03:23:00,831 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-21 03:23:00,831 INFO L280 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-01-21 03:23:00,843 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-21 03:23:00,862 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-21 03:23:00,876 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-21 03:23:00,881 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-21 03:23:00,908 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2018-01-21 03:23:00,908 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-21 03:23:01,000 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2018-01-21 03:23:01,002 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-01-21 03:23:01,002 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8, 6, 6] total 19 [2018-01-21 03:23:01,002 INFO L247 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-01-21 03:23:01,003 INFO L409 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-01-21 03:23:01,003 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-01-21 03:23:01,003 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2018-01-21 03:23:01,004 INFO L87 Difference]: Start difference. First operand 73 states and 81 transitions. Second operand 12 states. [2018-01-21 03:23:01,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 03:23:01,240 INFO L93 Difference]: Finished difference Result 192 states and 218 transitions. [2018-01-21 03:23:01,241 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-01-21 03:23:01,241 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 70 [2018-01-21 03:23:01,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 03:23:01,243 INFO L225 Difference]: With dead ends: 192 [2018-01-21 03:23:01,243 INFO L226 Difference]: Without dead ends: 143 [2018-01-21 03:23:01,244 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 262 SyntacticMatches, 5 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=129, Invalid=423, Unknown=0, NotChecked=0, Total=552 [2018-01-21 03:23:01,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2018-01-21 03:23:01,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 101. [2018-01-21 03:23:01,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-01-21 03:23:01,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 113 transitions. [2018-01-21 03:23:01,256 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 113 transitions. Word has length 70 [2018-01-21 03:23:01,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 03:23:01,257 INFO L432 AbstractCegarLoop]: Abstraction has 101 states and 113 transitions. [2018-01-21 03:23:01,257 INFO L433 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-01-21 03:23:01,257 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 113 transitions. [2018-01-21 03:23:01,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-01-21 03:23:01,258 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 03:23:01,258 INFO L322 BasicCegarLoop]: trace histogram [9, 5, 5, 5, 5, 5, 4, 4, 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, 1] [2018-01-21 03:23:01,258 INFO L371 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 03:23:01,258 INFO L82 PathProgramCache]: Analyzing trace with hash 1934895936, now seen corresponding path program 3 times [2018-01-21 03:23:01,258 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 03:23:01,259 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:23:01,259 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-21 03:23:01,259 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:23:01,259 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 03:23:01,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 03:23:01,287 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 03:23:01,418 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2018-01-21 03:23:01,418 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 03:23:01,418 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-21 03:23:01,419 INFO L183 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-01-21 03:23:01,419 INFO L434 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-01-21 03:23:01,419 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 03:23:01,419 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-21 03:23:01,427 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-21 03:23:01,427 INFO L280 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-01-21 03:23:01,443 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-21 03:23:01,448 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-21 03:23:01,454 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-21 03:23:01,462 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-21 03:23:01,463 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-21 03:23:01,467 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-21 03:23:01,515 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 83 proven. 9 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2018-01-21 03:23:01,515 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-21 03:23:01,699 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 83 proven. 9 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2018-01-21 03:23:01,720 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 03:23:01,720 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 10 with cvc4 --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with cvc4 --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-01-21 03:23:01,723 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-21 03:23:01,723 INFO L280 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-01-21 03:23:01,736 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-21 03:23:01,746 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-21 03:23:01,761 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-21 03:23:01,784 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-21 03:23:01,797 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-21 03:23:01,803 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-21 03:23:01,815 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 83 proven. 9 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2018-01-21 03:23:01,815 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-21 03:23:01,916 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 83 proven. 9 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2018-01-21 03:23:01,918 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-01-21 03:23:01,919 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8, 8, 8] total 17 [2018-01-21 03:23:01,919 INFO L247 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-01-21 03:23:01,919 INFO L409 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-01-21 03:23:01,920 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-01-21 03:23:01,920 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2018-01-21 03:23:01,920 INFO L87 Difference]: Start difference. First operand 101 states and 113 transitions. Second operand 11 states. [2018-01-21 03:23:02,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 03:23:02,206 INFO L93 Difference]: Finished difference Result 239 states and 273 transitions. [2018-01-21 03:23:02,206 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-01-21 03:23:02,207 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 98 [2018-01-21 03:23:02,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 03:23:02,208 INFO L225 Difference]: With dead ends: 239 [2018-01-21 03:23:02,208 INFO L226 Difference]: Without dead ends: 206 [2018-01-21 03:23:02,209 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 400 GetRequests, 380 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=276, Unknown=0, NotChecked=0, Total=380 [2018-01-21 03:23:02,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2018-01-21 03:23:02,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 142. [2018-01-21 03:23:02,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2018-01-21 03:23:02,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 162 transitions. [2018-01-21 03:23:02,222 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 162 transitions. Word has length 98 [2018-01-21 03:23:02,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 03:23:02,222 INFO L432 AbstractCegarLoop]: Abstraction has 142 states and 162 transitions. [2018-01-21 03:23:02,222 INFO L433 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-01-21 03:23:02,222 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 162 transitions. [2018-01-21 03:23:02,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2018-01-21 03:23:02,224 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 03:23:02,224 INFO L322 BasicCegarLoop]: trace histogram [14, 9, 9, 9, 9, 6, 5, 5, 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, 1] [2018-01-21 03:23:02,224 INFO L371 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 03:23:02,224 INFO L82 PathProgramCache]: Analyzing trace with hash -883540994, now seen corresponding path program 4 times [2018-01-21 03:23:02,224 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 03:23:02,225 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:23:02,225 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-21 03:23:02,225 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:23:02,225 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 03:23:02,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 03:23:02,259 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 03:23:02,659 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2018-01-21 03:23:02,659 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 03:23:02,660 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-21 03:23:02,660 INFO L183 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-01-21 03:23:02,660 INFO L434 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-01-21 03:23:02,660 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 03:23:02,660 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-21 03:23:02,672 INFO L101 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-01-21 03:23:02,672 INFO L280 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-01-21 03:23:02,718 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-21 03:23:02,723 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-21 03:23:03,069 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 226 proven. 21 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2018-01-21 03:23:03,069 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-21 03:23:03,319 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 226 proven. 21 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2018-01-21 03:23:03,341 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 03:23:03,341 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 12 with cvc4 --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with cvc4 --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-01-21 03:23:03,345 INFO L101 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-01-21 03:23:03,345 INFO L280 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-01-21 03:23:03,415 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-21 03:23:03,422 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-21 03:23:03,452 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 226 proven. 21 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2018-01-21 03:23:03,452 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-21 03:23:03,662 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 226 proven. 21 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2018-01-21 03:23:03,664 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-01-21 03:23:03,664 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12, 12, 12, 12] total 22 [2018-01-21 03:23:03,664 INFO L247 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-01-21 03:23:03,664 INFO L409 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-01-21 03:23:03,665 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-01-21 03:23:03,665 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2018-01-21 03:23:03,665 INFO L87 Difference]: Start difference. First operand 142 states and 162 transitions. Second operand 18 states. [2018-01-21 03:23:04,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 03:23:04,163 INFO L93 Difference]: Finished difference Result 371 states and 427 transitions. [2018-01-21 03:23:04,163 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-01-21 03:23:04,163 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 131 [2018-01-21 03:23:04,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 03:23:04,166 INFO L225 Difference]: With dead ends: 371 [2018-01-21 03:23:04,167 INFO L226 Difference]: Without dead ends: 283 [2018-01-21 03:23:04,168 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 539 GetRequests, 496 SyntacticMatches, 14 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=182, Invalid=748, Unknown=0, NotChecked=0, Total=930 [2018-01-21 03:23:04,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2018-01-21 03:23:04,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 180. [2018-01-21 03:23:04,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2018-01-21 03:23:04,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 205 transitions. [2018-01-21 03:23:04,186 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 205 transitions. Word has length 131 [2018-01-21 03:23:04,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 03:23:04,186 INFO L432 AbstractCegarLoop]: Abstraction has 180 states and 205 transitions. [2018-01-21 03:23:04,186 INFO L433 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-01-21 03:23:04,187 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 205 transitions. [2018-01-21 03:23:04,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2018-01-21 03:23:04,188 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 03:23:04,188 INFO L322 BasicCegarLoop]: trace histogram [19, 13, 13, 13, 13, 7, 6, 6, 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, 1] [2018-01-21 03:23:04,188 INFO L371 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 03:23:04,189 INFO L82 PathProgramCache]: Analyzing trace with hash 1207261824, now seen corresponding path program 5 times [2018-01-21 03:23:04,189 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 03:23:04,189 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:23:04,189 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-21 03:23:04,190 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:23:04,190 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 03:23:04,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 03:23:04,224 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 03:23:04,457 INFO L134 CoverageAnalysis]: Checked inductivity of 753 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 636 trivial. 0 not checked. [2018-01-21 03:23:04,457 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 03:23:04,458 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-21 03:23:04,458 INFO L183 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-01-21 03:23:04,458 INFO L434 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-01-21 03:23:04,458 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 03:23:04,458 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-21 03:23:04,466 INFO L101 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-01-21 03:23:04,466 INFO L280 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder INSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-01-21 03:23:04,481 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-21 03:23:04,484 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-21 03:23:04,489 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-21 03:23:04,493 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-21 03:23:04,498 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-21 03:23:04,505 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-21 03:23:04,506 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-21 03:23:04,510 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-21 03:23:04,619 INFO L134 CoverageAnalysis]: Checked inductivity of 753 backedges. 476 proven. 53 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked. [2018-01-21 03:23:04,619 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-21 03:23:04,863 INFO L134 CoverageAnalysis]: Checked inductivity of 753 backedges. 146 proven. 235 refuted. 0 times theorem prover too weak. 372 trivial. 0 not checked. [2018-01-21 03:23:04,885 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 03:23:04,885 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 14 with cvc4 --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with cvc4 --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-01-21 03:23:04,889 INFO L101 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-01-21 03:23:04,889 INFO L280 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder INSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-01-21 03:23:04,905 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-21 03:23:04,911 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-21 03:23:04,923 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-21 03:23:04,939 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-21 03:23:04,963 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-21 03:23:05,356 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-21 03:23:05,387 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-21 03:23:05,395 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-21 03:23:05,424 INFO L134 CoverageAnalysis]: Checked inductivity of 753 backedges. 476 proven. 53 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked. [2018-01-21 03:23:05,424 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-21 03:23:05,671 INFO L134 CoverageAnalysis]: Checked inductivity of 753 backedges. 146 proven. 235 refuted. 0 times theorem prover too weak. 372 trivial. 0 not checked. [2018-01-21 03:23:05,673 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-01-21 03:23:05,673 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 11, 11, 11] total 22 [2018-01-21 03:23:05,673 INFO L247 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-01-21 03:23:05,673 INFO L409 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-01-21 03:23:05,674 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-01-21 03:23:05,674 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2018-01-21 03:23:05,674 INFO L87 Difference]: Start difference. First operand 180 states and 205 transitions. Second operand 18 states. [2018-01-21 03:23:06,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 03:23:06,174 INFO L93 Difference]: Finished difference Result 418 states and 475 transitions. [2018-01-21 03:23:06,174 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-01-21 03:23:06,175 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 164 [2018-01-21 03:23:06,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 03:23:06,177 INFO L225 Difference]: With dead ends: 418 [2018-01-21 03:23:06,177 INFO L226 Difference]: Without dead ends: 249 [2018-01-21 03:23:06,179 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 684 GetRequests, 635 SyntacticMatches, 14 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 331 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=242, Invalid=1090, Unknown=0, NotChecked=0, Total=1332 [2018-01-21 03:23:06,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2018-01-21 03:23:06,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 187. [2018-01-21 03:23:06,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2018-01-21 03:23:06,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 208 transitions. [2018-01-21 03:23:06,196 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 208 transitions. Word has length 164 [2018-01-21 03:23:06,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 03:23:06,196 INFO L432 AbstractCegarLoop]: Abstraction has 187 states and 208 transitions. [2018-01-21 03:23:06,196 INFO L433 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-01-21 03:23:06,196 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 208 transitions. [2018-01-21 03:23:06,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2018-01-21 03:23:06,199 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 03:23:06,199 INFO L322 BasicCegarLoop]: trace histogram [25, 18, 18, 18, 18, 8, 7, 7, 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, 1] [2018-01-21 03:23:06,200 INFO L371 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 03:23:06,200 INFO L82 PathProgramCache]: Analyzing trace with hash -1562233122, now seen corresponding path program 6 times [2018-01-21 03:23:06,200 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 03:23:06,201 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:23:06,201 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-21 03:23:06,201 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:23:06,201 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 03:23:06,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 03:23:06,250 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 03:23:06,468 INFO L134 CoverageAnalysis]: Checked inductivity of 1304 backedges. 0 proven. 161 refuted. 0 times theorem prover too weak. 1143 trivial. 0 not checked. [2018-01-21 03:23:06,468 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 03:23:06,469 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-21 03:23:06,469 INFO L183 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-01-21 03:23:06,469 INFO L434 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-01-21 03:23:06,469 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 03:23:06,469 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-21 03:23:06,476 INFO L101 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-01-21 03:23:06,476 INFO L280 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder MIX_INSIDE_OUTSIDE (IT: FPandBP) [2018-01-21 03:23:06,494 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-21 03:23:06,497 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-21 03:23:06,500 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-21 03:23:06,505 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-21 03:23:06,510 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-21 03:23:06,516 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-21 03:23:06,523 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-21 03:23:06,531 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-21 03:23:06,542 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-21 03:23:06,543 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-21 03:23:06,549 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-21 03:23:06,575 INFO L134 CoverageAnalysis]: Checked inductivity of 1304 backedges. 0 proven. 161 refuted. 0 times theorem prover too weak. 1143 trivial. 0 not checked. [2018-01-21 03:23:06,576 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-21 03:23:06,718 INFO L134 CoverageAnalysis]: Checked inductivity of 1304 backedges. 0 proven. 161 refuted. 0 times theorem prover too weak. 1143 trivial. 0 not checked. [2018-01-21 03:23:06,740 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 03:23:06,740 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 16 with cvc4 --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with cvc4 --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-01-21 03:23:06,744 INFO L101 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-01-21 03:23:06,745 INFO L280 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder MIX_INSIDE_OUTSIDE (IT: FPandBP) [2018-01-21 03:23:06,767 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-21 03:23:06,774 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-21 03:23:06,789 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-21 03:23:06,820 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-21 03:23:06,877 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-21 03:23:07,045 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-21 03:23:08,489 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-21 03:23:08,947 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-21 03:23:20,983 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-21 03:23:21,063 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-21 03:23:21,074 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-21 03:23:21,108 INFO L134 CoverageAnalysis]: Checked inductivity of 1304 backedges. 0 proven. 161 refuted. 0 times theorem prover too weak. 1143 trivial. 0 not checked. [2018-01-21 03:23:21,108 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-21 03:23:21,207 INFO L134 CoverageAnalysis]: Checked inductivity of 1304 backedges. 0 proven. 161 refuted. 0 times theorem prover too weak. 1143 trivial. 0 not checked. [2018-01-21 03:23:21,210 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-01-21 03:23:21,210 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 10] total 19 [2018-01-21 03:23:21,210 INFO L247 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-01-21 03:23:21,210 INFO L409 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-01-21 03:23:21,211 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-01-21 03:23:21,211 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-01-21 03:23:21,211 INFO L87 Difference]: Start difference. First operand 187 states and 208 transitions. Second operand 11 states. [2018-01-21 03:23:21,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 03:23:21,370 INFO L93 Difference]: Finished difference Result 295 states and 329 transitions. [2018-01-21 03:23:21,370 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-01-21 03:23:21,370 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 202 [2018-01-21 03:23:21,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 03:23:21,372 INFO L225 Difference]: With dead ends: 295 [2018-01-21 03:23:21,373 INFO L226 Difference]: Without dead ends: 247 [2018-01-21 03:23:21,373 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 816 GetRequests, 799 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-01-21 03:23:21,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2018-01-21 03:23:21,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 199. [2018-01-21 03:23:21,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2018-01-21 03:23:21,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 222 transitions. [2018-01-21 03:23:21,389 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 222 transitions. Word has length 202 [2018-01-21 03:23:21,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 03:23:21,390 INFO L432 AbstractCegarLoop]: Abstraction has 199 states and 222 transitions. [2018-01-21 03:23:21,390 INFO L433 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-01-21 03:23:21,390 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 222 transitions. [2018-01-21 03:23:21,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2018-01-21 03:23:21,393 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 03:23:21,394 INFO L322 BasicCegarLoop]: trace histogram [30, 22, 22, 22, 22, 9, 8, 8, 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, 1] [2018-01-21 03:23:21,394 INFO L371 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 03:23:21,394 INFO L82 PathProgramCache]: Analyzing trace with hash 1505706396, now seen corresponding path program 7 times [2018-01-21 03:23:21,394 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 03:23:21,395 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:23:21,395 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-21 03:23:21,395 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:23:21,395 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 03:23:21,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 03:23:21,454 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 03:23:21,806 INFO L134 CoverageAnalysis]: Checked inductivity of 1887 backedges. 0 proven. 212 refuted. 0 times theorem prover too weak. 1675 trivial. 0 not checked. [2018-01-21 03:23:21,807 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 03:23:21,807 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-21 03:23:21,807 INFO L183 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-01-21 03:23:21,807 INFO L434 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-01-21 03:23:21,807 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 03:23:21,807 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-21 03:23:21,813 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 03:23:21,814 INFO L280 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-01-21 03:23:21,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 03:23:21,896 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-21 03:23:22,401 INFO L134 CoverageAnalysis]: Checked inductivity of 1887 backedges. 1262 proven. 38 refuted. 0 times theorem prover too weak. 587 trivial. 0 not checked. [2018-01-21 03:23:22,401 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-21 03:23:22,757 INFO L134 CoverageAnalysis]: Checked inductivity of 1887 backedges. 478 proven. 240 refuted. 0 times theorem prover too weak. 1169 trivial. 0 not checked. [2018-01-21 03:23:22,778 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 03:23:22,779 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 18 with cvc4 --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with cvc4 --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-01-21 03:23:22,782 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 03:23:22,782 INFO L280 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-01-21 03:23:22,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 03:23:22,919 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-21 03:23:22,974 INFO L134 CoverageAnalysis]: Checked inductivity of 1887 backedges. 1262 proven. 38 refuted. 0 times theorem prover too weak. 587 trivial. 0 not checked. [2018-01-21 03:23:22,974 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-21 03:23:23,174 INFO L134 CoverageAnalysis]: Checked inductivity of 1887 backedges. 478 proven. 240 refuted. 0 times theorem prover too weak. 1169 trivial. 0 not checked. [2018-01-21 03:23:23,176 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-01-21 03:23:23,177 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14, 14, 14, 14] total 28 [2018-01-21 03:23:23,177 INFO L247 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-01-21 03:23:23,177 INFO L409 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-01-21 03:23:23,178 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-01-21 03:23:23,178 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=611, Unknown=0, NotChecked=0, Total=756 [2018-01-21 03:23:23,178 INFO L87 Difference]: Start difference. First operand 199 states and 222 transitions. Second operand 23 states. [2018-01-21 03:23:23,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 03:23:23,777 INFO L93 Difference]: Finished difference Result 498 states and 557 transitions. [2018-01-21 03:23:23,777 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-01-21 03:23:23,777 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 235 [2018-01-21 03:23:23,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 03:23:23,780 INFO L225 Difference]: With dead ends: 498 [2018-01-21 03:23:23,780 INFO L226 Difference]: Without dead ends: 390 [2018-01-21 03:23:23,781 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 962 GetRequests, 907 SyntacticMatches, 16 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 547 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=306, Invalid=1334, Unknown=0, NotChecked=0, Total=1640 [2018-01-21 03:23:23,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2018-01-21 03:23:23,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 242. [2018-01-21 03:23:23,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 242 states. [2018-01-21 03:23:23,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 271 transitions. [2018-01-21 03:23:23,800 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 271 transitions. Word has length 235 [2018-01-21 03:23:23,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 03:23:23,801 INFO L432 AbstractCegarLoop]: Abstraction has 242 states and 271 transitions. [2018-01-21 03:23:23,801 INFO L433 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-01-21 03:23:23,801 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 271 transitions. [2018-01-21 03:23:23,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 289 [2018-01-21 03:23:23,804 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 03:23:23,804 INFO L322 BasicCegarLoop]: trace histogram [39, 30, 30, 30, 30, 10, 9, 9, 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, 1] [2018-01-21 03:23:23,804 INFO L371 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 03:23:23,804 INFO L82 PathProgramCache]: Analyzing trace with hash 369611686, now seen corresponding path program 8 times [2018-01-21 03:23:23,804 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 03:23:23,805 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:23:23,805 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 03:23:23,805 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:23:23,805 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 03:23:23,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 03:23:23,854 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 03:23:24,119 INFO L134 CoverageAnalysis]: Checked inductivity of 3201 backedges. 0 proven. 270 refuted. 0 times theorem prover too weak. 2931 trivial. 0 not checked. [2018-01-21 03:23:24,120 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 03:23:24,120 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-21 03:23:24,120 INFO L183 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-01-21 03:23:24,120 INFO L434 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-01-21 03:23:24,120 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 03:23:24,120 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-21 03:23:24,125 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-21 03:23:24,125 INFO L280 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-01-21 03:23:24,144 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-21 03:23:24,177 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-21 03:23:24,183 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-21 03:23:24,190 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-21 03:23:24,596 INFO L134 CoverageAnalysis]: Checked inductivity of 3201 backedges. 2050 proven. 60 refuted. 0 times theorem prover too weak. 1091 trivial. 0 not checked. [2018-01-21 03:23:24,596 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-21 03:23:25,332 INFO L134 CoverageAnalysis]: Checked inductivity of 3201 backedges. 746 proven. 360 refuted. 0 times theorem prover too weak. 2095 trivial. 0 not checked. [2018-01-21 03:23:25,366 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 03:23:25,367 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 20 with cvc4 --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with cvc4 --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-01-21 03:23:25,370 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-21 03:23:25,370 INFO L280 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-01-21 03:23:25,396 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-21 03:23:25,466 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-21 03:23:25,512 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-21 03:23:25,523 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-21 03:23:25,623 INFO L134 CoverageAnalysis]: Checked inductivity of 3201 backedges. 2050 proven. 60 refuted. 0 times theorem prover too weak. 1091 trivial. 0 not checked. [2018-01-21 03:23:25,623 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-21 03:23:25,879 INFO L134 CoverageAnalysis]: Checked inductivity of 3201 backedges. 746 proven. 360 refuted. 0 times theorem prover too weak. 2095 trivial. 0 not checked. [2018-01-21 03:23:25,881 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-01-21 03:23:25,881 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16, 16, 16, 16] total 32 [2018-01-21 03:23:25,881 INFO L247 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-01-21 03:23:25,882 INFO L409 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-01-21 03:23:25,882 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-01-21 03:23:25,883 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=807, Unknown=0, NotChecked=0, Total=992 [2018-01-21 03:23:25,883 INFO L87 Difference]: Start difference. First operand 242 states and 271 transitions. Second operand 26 states. [2018-01-21 03:23:26,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 03:23:26,758 INFO L93 Difference]: Finished difference Result 607 states and 679 transitions. [2018-01-21 03:23:26,758 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-01-21 03:23:26,758 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 288 [2018-01-21 03:23:26,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 03:23:26,763 INFO L225 Difference]: With dead ends: 607 [2018-01-21 03:23:26,764 INFO L226 Difference]: Without dead ends: 486 [2018-01-21 03:23:26,765 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 1177 GetRequests, 1114 SyntacticMatches, 18 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 734 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=392, Invalid=1770, Unknown=0, NotChecked=0, Total=2162 [2018-01-21 03:23:26,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2018-01-21 03:23:26,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 290. [2018-01-21 03:23:26,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 290 states. [2018-01-21 03:23:26,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 326 transitions. [2018-01-21 03:23:26,789 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 326 transitions. Word has length 288 [2018-01-21 03:23:26,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 03:23:26,789 INFO L432 AbstractCegarLoop]: Abstraction has 290 states and 326 transitions. [2018-01-21 03:23:26,789 INFO L433 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-01-21 03:23:26,789 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 326 transitions. [2018-01-21 03:23:26,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 347 [2018-01-21 03:23:26,792 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 03:23:26,792 INFO L322 BasicCegarLoop]: trace histogram [49, 39, 39, 39, 39, 11, 10, 10, 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, 1] [2018-01-21 03:23:26,792 INFO L371 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 03:23:26,793 INFO L82 PathProgramCache]: Analyzing trace with hash -292281344, now seen corresponding path program 9 times [2018-01-21 03:23:26,793 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 03:23:26,793 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:23:26,794 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-21 03:23:26,794 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:23:26,794 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 03:23:26,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 03:23:26,837 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 03:23:27,176 INFO L134 CoverageAnalysis]: Checked inductivity of 5090 backedges. 0 proven. 335 refuted. 0 times theorem prover too weak. 4755 trivial. 0 not checked. [2018-01-21 03:23:27,176 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 03:23:27,176 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-21 03:23:27,177 INFO L183 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-01-21 03:23:27,177 INFO L434 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-01-21 03:23:27,177 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 03:23:27,177 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-21 03:23:27,182 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-21 03:23:27,182 INFO L280 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-01-21 03:23:27,207 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-21 03:23:27,211 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-21 03:23:27,215 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-21 03:23:27,221 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-21 03:23:27,229 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-21 03:23:27,237 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-21 03:23:27,245 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-21 03:23:27,255 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-21 03:23:27,257 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-21 03:23:27,263 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-21 03:23:27,410 INFO L134 CoverageAnalysis]: Checked inductivity of 5090 backedges. 1265 proven. 87 refuted. 0 times theorem prover too weak. 3738 trivial. 0 not checked. [2018-01-21 03:23:27,410 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-21 03:23:28,161 INFO L134 CoverageAnalysis]: Checked inductivity of 5090 backedges. 1265 proven. 87 refuted. 0 times theorem prover too weak. 3738 trivial. 0 not checked. [2018-01-21 03:23:28,182 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 03:23:28,182 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 22 with cvc4 --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with cvc4 --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-01-21 03:23:28,185 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-21 03:23:28,185 INFO L280 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-01-21 03:23:28,218 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-21 03:23:28,230 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-21 03:23:28,244 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-21 03:23:28,266 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-21 03:23:28,302 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-21 03:23:28,378 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-21 03:23:28,736 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-21 03:23:29,796 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-21 03:23:29,843 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-21 03:23:29,854 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-21 03:23:29,937 INFO L134 CoverageAnalysis]: Checked inductivity of 5090 backedges. 1265 proven. 87 refuted. 0 times theorem prover too weak. 3738 trivial. 0 not checked. [2018-01-21 03:23:29,937 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-21 03:23:30,306 INFO L134 CoverageAnalysis]: Checked inductivity of 5090 backedges. 1265 proven. 87 refuted. 0 times theorem prover too weak. 3738 trivial. 0 not checked. [2018-01-21 03:23:30,308 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-01-21 03:23:30,309 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12, 12, 12] total 31 [2018-01-21 03:23:30,309 INFO L247 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-01-21 03:23:30,309 INFO L409 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-01-21 03:23:30,309 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-01-21 03:23:30,310 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=243, Invalid=687, Unknown=0, NotChecked=0, Total=930 [2018-01-21 03:23:30,310 INFO L87 Difference]: Start difference. First operand 290 states and 326 transitions. Second operand 21 states. [2018-01-21 03:23:31,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 03:23:31,203 INFO L93 Difference]: Finished difference Result 697 states and 790 transitions. [2018-01-21 03:23:31,203 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-01-21 03:23:31,203 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 346 [2018-01-21 03:23:31,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 03:23:31,214 INFO L225 Difference]: With dead ends: 697 [2018-01-21 03:23:31,214 INFO L226 Difference]: Without dead ends: 634 [2018-01-21 03:23:31,216 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 1402 GetRequests, 1364 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=369, Invalid=1037, Unknown=0, NotChecked=0, Total=1406 [2018-01-21 03:23:31,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 634 states. [2018-01-21 03:23:31,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 634 to 351. [2018-01-21 03:23:31,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 351 states. [2018-01-21 03:23:31,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 400 transitions. [2018-01-21 03:23:31,246 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 400 transitions. Word has length 346 [2018-01-21 03:23:31,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 03:23:31,248 INFO L432 AbstractCegarLoop]: Abstraction has 351 states and 400 transitions. [2018-01-21 03:23:31,248 INFO L433 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-01-21 03:23:31,248 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 400 transitions. [2018-01-21 03:23:31,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 410 [2018-01-21 03:23:31,252 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 03:23:31,252 INFO L322 BasicCegarLoop]: trace histogram [60, 49, 49, 49, 49, 12, 11, 11, 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, 1] [2018-01-21 03:23:31,252 INFO L371 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 03:23:31,252 INFO L82 PathProgramCache]: Analyzing trace with hash 1529949378, now seen corresponding path program 10 times [2018-01-21 03:23:31,252 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 03:23:31,253 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:23:31,253 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-21 03:23:31,253 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:23:31,254 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 03:23:31,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 03:23:31,303 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 03:23:31,803 INFO L134 CoverageAnalysis]: Checked inductivity of 7695 backedges. 0 proven. 407 refuted. 0 times theorem prover too weak. 7288 trivial. 0 not checked. [2018-01-21 03:23:31,803 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 03:23:31,803 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-21 03:23:31,804 INFO L183 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-01-21 03:23:31,804 INFO L434 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-01-21 03:23:31,804 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 03:23:31,804 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-21 03:23:31,811 INFO L101 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-01-21 03:23:31,811 INFO L280 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-01-21 03:23:31,916 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-21 03:23:31,925 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-21 03:23:32,266 INFO L134 CoverageAnalysis]: Checked inductivity of 7695 backedges. 4526 proven. 119 refuted. 0 times theorem prover too weak. 3050 trivial. 0 not checked. [2018-01-21 03:23:32,267 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-21 03:23:32,679 INFO L134 CoverageAnalysis]: Checked inductivity of 7695 backedges. 1576 proven. 675 refuted. 0 times theorem prover too weak. 5444 trivial. 0 not checked. [2018-01-21 03:23:32,700 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 03:23:32,700 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 24 with cvc4 --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with cvc4 --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-01-21 03:23:32,703 INFO L101 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-01-21 03:23:32,703 INFO L280 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-01-21 03:23:32,853 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-21 03:23:32,866 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-21 03:23:32,958 INFO L134 CoverageAnalysis]: Checked inductivity of 7695 backedges. 4526 proven. 119 refuted. 0 times theorem prover too weak. 3050 trivial. 0 not checked. [2018-01-21 03:23:32,958 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-21 03:23:33,300 INFO L134 CoverageAnalysis]: Checked inductivity of 7695 backedges. 1576 proven. 675 refuted. 0 times theorem prover too weak. 5444 trivial. 0 not checked. [2018-01-21 03:23:33,301 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-01-21 03:23:33,302 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 20, 20, 20, 20] total 40 [2018-01-21 03:23:33,302 INFO L247 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-01-21 03:23:33,302 INFO L409 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-01-21 03:23:33,303 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-01-21 03:23:33,303 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=1280, Unknown=0, NotChecked=0, Total=1560 [2018-01-21 03:23:33,303 INFO L87 Difference]: Start difference. First operand 351 states and 400 transitions. Second operand 32 states. [2018-01-21 03:23:34,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 03:23:34,294 INFO L93 Difference]: Finished difference Result 905 states and 1030 transitions. [2018-01-21 03:23:34,297 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-01-21 03:23:34,297 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 409 [2018-01-21 03:23:34,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 03:23:34,302 INFO L225 Difference]: With dead ends: 905 [2018-01-21 03:23:34,338 INFO L226 Difference]: Without dead ends: 744 [2018-01-21 03:23:34,340 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 1667 GetRequests, 1588 SyntacticMatches, 22 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1189 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=597, Invalid=2825, Unknown=0, NotChecked=0, Total=3422 [2018-01-21 03:23:34,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 744 states. [2018-01-21 03:23:34,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 744 to 409. [2018-01-21 03:23:34,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 409 states. [2018-01-21 03:23:34,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 464 transitions. [2018-01-21 03:23:34,371 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 464 transitions. Word has length 409 [2018-01-21 03:23:34,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 03:23:34,372 INFO L432 AbstractCegarLoop]: Abstraction has 409 states and 464 transitions. [2018-01-21 03:23:34,372 INFO L433 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-01-21 03:23:34,372 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 464 transitions. [2018-01-21 03:23:34,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 473 [2018-01-21 03:23:34,376 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 03:23:34,376 INFO L322 BasicCegarLoop]: trace histogram [71, 59, 59, 59, 59, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 03:23:34,376 INFO L371 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 03:23:34,376 INFO L82 PathProgramCache]: Analyzing trace with hash 1199895744, now seen corresponding path program 11 times [2018-01-21 03:23:34,376 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 03:23:34,377 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:23:34,377 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-21 03:23:34,377 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:23:34,378 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 03:23:34,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 03:23:34,430 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 03:23:34,915 INFO L134 CoverageAnalysis]: Checked inductivity of 10853 backedges. 0 proven. 486 refuted. 0 times theorem prover too weak. 10367 trivial. 0 not checked. [2018-01-21 03:23:34,916 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 03:23:34,916 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-21 03:23:34,916 INFO L183 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-01-21 03:23:34,916 INFO L434 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-01-21 03:23:34,916 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 03:23:34,916 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-21 03:23:34,927 INFO L101 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-01-21 03:23:34,928 INFO L280 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder INSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-01-21 03:23:34,963 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-21 03:23:34,972 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-21 03:23:34,982 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-21 03:23:34,994 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-21 03:23:35,008 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-21 03:23:35,024 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-21 03:23:35,046 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-21 03:23:35,065 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-21 03:23:35,069 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-21 03:23:35,079 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-21 03:23:35,370 INFO L134 CoverageAnalysis]: Checked inductivity of 10853 backedges. 6406 proven. 313 refuted. 0 times theorem prover too weak. 4134 trivial. 0 not checked. [2018-01-21 03:23:35,370 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-21 03:23:36,410 INFO L134 CoverageAnalysis]: Checked inductivity of 10853 backedges. 1168 proven. 1655 refuted. 0 times theorem prover too weak. 8030 trivial. 0 not checked. [2018-01-21 03:23:36,432 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 03:23:36,432 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 26 with cvc4 --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with cvc4 --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-01-21 03:23:36,435 INFO L101 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-01-21 03:23:36,436 INFO L280 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder INSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-01-21 03:23:36,476 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-21 03:23:36,493 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-21 03:23:36,533 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-21 03:23:36,677 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command Received shutdown request... [2018-01-21 03:23:48,717 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command Cannot interrupt operation gracefully because timeout expired. Forcing shutdown