java -Xmx6000000000 -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data ./data --generate-csv --csv-dir ../../../releaseScripts/default/UAutomizer-linux/csv -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/ai/eq-bench/mempurity-32bit-Automizer_Taipan+AI_EQ_imprecise.epf -i ../../../trunk/examples/svcomp/ldv-memsafety/ArraysOfVariableLength2_false-valid-deref-read.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-2f49842 [2018-01-21 00:42:51,817 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-21 00:42:51,819 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-21 00:42:51,833 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-21 00:42:51,833 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-21 00:42:51,834 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-21 00:42:51,835 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-21 00:42:51,837 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-21 00:42:51,838 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-21 00:42:51,839 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-21 00:42:51,839 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-01-21 00:42:51,839 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-01-21 00:42:51,840 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-01-21 00:42:51,841 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-01-21 00:42:51,841 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-01-21 00:42:51,843 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-01-21 00:42:51,845 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-01-21 00:42:51,847 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-01-21 00:42:51,848 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-01-21 00:42:51,850 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-01-21 00:42:51,852 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-01-21 00:42:51,852 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-01-21 00:42:51,852 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-01-21 00:42:51,853 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-01-21 00:42:51,854 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-01-21 00:42:51,855 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-01-21 00:42:51,855 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-01-21 00:42:51,856 INFO L177 SettingsManager]: PEA to Boogie provides no preferences, ignoring... [2018-01-21 00:42:51,856 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-01-21 00:42:51,856 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-01-21 00:42:51,857 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-01-21 00:42:51,857 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/eq-bench/mempurity-32bit-Automizer_Taipan+AI_EQ_imprecise.epf [2018-01-21 00:42:51,866 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-21 00:42:51,867 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-21 00:42:51,867 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-21 00:42:51,868 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-21 00:42:51,868 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-21 00:42:51,868 INFO L133 SettingsManager]: * Deactivate Weak Equivalences=true [2018-01-21 00:42:51,868 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-21 00:42:51,868 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-21 00:42:51,869 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-21 00:42:51,869 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-21 00:42:51,869 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-21 00:42:51,869 INFO L133 SettingsManager]: * Check allocation purity=true [2018-01-21 00:42:51,870 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-21 00:42:51,870 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-21 00:42:51,870 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-21 00:42:51,870 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-01-21 00:42:51,870 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-21 00:42:51,871 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-01-21 00:42:51,871 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-21 00:42:51,871 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-01-21 00:42:51,871 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-01-21 00:42:51,871 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-21 00:42:51,872 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-01-21 00:42:51,872 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-21 00:42:51,872 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-21 00:42:51,872 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-21 00:42:51,872 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-21 00:42:51,873 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-21 00:42:51,873 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-21 00:42:51,873 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-21 00:42:51,873 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-21 00:42:51,873 INFO L133 SettingsManager]: * Stop after first violation was found=false [2018-01-21 00:42:51,873 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-01-21 00:42:51,874 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-21 00:42:51,874 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-21 00:42:51,874 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-21 00:42:51,874 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-01-21 00:42:51,875 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-21 00:42:51,875 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-21 00:42:51,908 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-21 00:42:51,921 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-21 00:42:51,925 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-21 00:42:51,927 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-21 00:42:51,927 INFO L276 PluginConnector]: CDTParser initialized [2018-01-21 00:42:51,928 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-memsafety/ArraysOfVariableLength2_false-valid-deref-read.c [2018-01-21 00:42:52,055 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-21 00:42:52,060 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-21 00:42:52,061 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-21 00:42:52,061 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-21 00:42:52,068 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-21 00:42:52,069 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.01 12:42:52" (1/1) ... [2018-01-21 00:42:52,073 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@78aaa565 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 12:42:52, skipping insertion in model container [2018-01-21 00:42:52,073 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.01 12:42:52" (1/1) ... [2018-01-21 00:42:52,091 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-21 00:42:52,111 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-21 00:42:52,229 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-21 00:42:52,248 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-21 00:42:52,255 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 12:42:52 WrapperNode [2018-01-21 00:42:52,256 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-21 00:42:52,256 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-21 00:42:52,256 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-21 00:42:52,256 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-21 00:42:52,267 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 12:42:52" (1/1) ... [2018-01-21 00:42:52,267 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 12:42:52" (1/1) ... [2018-01-21 00:42:52,275 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 12:42:52" (1/1) ... [2018-01-21 00:42:52,275 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 12:42:52" (1/1) ... [2018-01-21 00:42:52,279 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 12:42:52" (1/1) ... [2018-01-21 00:42:52,283 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 12:42:52" (1/1) ... [2018-01-21 00:42:52,285 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 12:42:52" (1/1) ... [2018-01-21 00:42:52,287 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-21 00:42:52,288 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-21 00:42:52,288 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-21 00:42:52,288 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-21 00:42:52,289 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 12:42:52" (1/1) ... No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-21 00:42:52,336 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-21 00:42:52,336 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-21 00:42:52,337 INFO L136 BoogieDeclarations]: Found implementation of procedure bar [2018-01-21 00:42:52,337 INFO L136 BoogieDeclarations]: Found implementation of procedure foo [2018-01-21 00:42:52,337 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-21 00:42:52,337 INFO L128 BoogieDeclarations]: Found specification of procedure write~int [2018-01-21 00:42:52,337 INFO L128 BoogieDeclarations]: Found specification of procedure read~int [2018-01-21 00:42:52,337 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-01-21 00:42:52,338 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-01-21 00:42:52,338 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-01-21 00:42:52,338 INFO L128 BoogieDeclarations]: Found specification of procedure bar [2018-01-21 00:42:52,338 INFO L128 BoogieDeclarations]: Found specification of procedure foo [2018-01-21 00:42:52,338 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-21 00:42:52,338 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-21 00:42:52,339 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-21 00:42:52,563 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-21 00:42:52,563 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.01 12:42:52 BoogieIcfgContainer [2018-01-21 00:42:52,563 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-21 00:42:52,564 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-01-21 00:42:52,564 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-01-21 00:42:52,566 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-01-21 00:42:52,567 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.01 12:42:52" (1/3) ... [2018-01-21 00:42:52,568 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e6f7ab7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.01 12:42:52, skipping insertion in model container [2018-01-21 00:42:52,568 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 12:42:52" (2/3) ... [2018-01-21 00:42:52,569 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e6f7ab7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.01 12:42:52, skipping insertion in model container [2018-01-21 00:42:52,569 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.01 12:42:52" (3/3) ... [2018-01-21 00:42:52,572 INFO L105 eAbstractionObserver]: Analyzing ICFG ArraysOfVariableLength2_false-valid-deref-read.c [2018-01-21 00:42:52,578 INFO L130 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-01-21 00:42:52,583 INFO L142 ceAbstractionStarter]: Appying trace abstraction to program that has 5 error locations. [2018-01-21 00:42:52,626 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 00:42:52,626 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 00:42:52,626 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 00:42:52,626 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 00:42:52,627 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 00:42:52,627 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 00:42:52,627 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 00:42:52,627 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == barErr0EnsuresViolation======== [2018-01-21 00:42:52,628 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 00:42:52,649 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states. [2018-01-21 00:42:52,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-01-21 00:42:52,654 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 00:42:52,655 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 00:42:52,655 INFO L371 AbstractCegarLoop]: === Iteration 1 === [barErr0EnsuresViolation]=== [2018-01-21 00:42:52,659 INFO L82 PathProgramCache]: Analyzing trace with hash -492377012, now seen corresponding path program 1 times [2018-01-21 00:42:52,661 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 00:42:52,701 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:42:52,701 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 00:42:52,701 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:42:52,701 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 00:42:52,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 00:42:52,760 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 00:42:52,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-21 00:42:52,802 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 00:42:52,802 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-21 00:42:52,803 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 00:42:52,806 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-21 00:42:52,817 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-21 00:42:52,818 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-21 00:42:52,820 INFO L87 Difference]: Start difference. First operand 62 states. Second operand 2 states. [2018-01-21 00:42:52,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 00:42:52,843 INFO L93 Difference]: Finished difference Result 114 states and 135 transitions. [2018-01-21 00:42:52,843 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-21 00:42:52,844 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 20 [2018-01-21 00:42:52,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 00:42:52,849 INFO L225 Difference]: With dead ends: 114 [2018-01-21 00:42:52,850 INFO L226 Difference]: Without dead ends: 0 [2018-01-21 00:42:52,853 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 00:42:52,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-01-21 00:42:52,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-01-21 00:42:52,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-01-21 00:42:52,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-01-21 00:42:52,875 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 20 [2018-01-21 00:42:52,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 00:42:52,875 INFO L432 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-01-21 00:42:52,876 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-21 00:42:52,876 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-01-21 00:42:52,876 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-01-21 00:42:52,880 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-01-21 00:42:52,984 INFO L404 ceAbstractionStarter]: At program point L13'''(lines 13 15) the Hoare annotation is: true [2018-01-21 00:42:52,984 INFO L401 ceAbstractionStarter]: For program point barErr0EnsuresViolation(lines 11 17) no Hoare annotation was computed. [2018-01-21 00:42:52,984 INFO L401 ceAbstractionStarter]: For program point L13''(lines 13 15) no Hoare annotation was computed. [2018-01-21 00:42:52,984 INFO L401 ceAbstractionStarter]: For program point L14(line 14) no Hoare annotation was computed. [2018-01-21 00:42:52,984 INFO L401 ceAbstractionStarter]: For program point L13(lines 13 15) no Hoare annotation was computed. [2018-01-21 00:42:52,985 INFO L404 ceAbstractionStarter]: At program point barENTRY(lines 11 17) the Hoare annotation is: true [2018-01-21 00:42:52,985 INFO L401 ceAbstractionStarter]: For program point L13''''(lines 13 15) no Hoare annotation was computed. [2018-01-21 00:42:52,985 INFO L401 ceAbstractionStarter]: For program point barFINAL(lines 11 17) no Hoare annotation was computed. [2018-01-21 00:42:52,985 INFO L401 ceAbstractionStarter]: For program point L14'(line 14) no Hoare annotation was computed. [2018-01-21 00:42:52,985 INFO L401 ceAbstractionStarter]: For program point barEXIT(lines 11 17) no Hoare annotation was computed. [2018-01-21 00:42:52,985 INFO L401 ceAbstractionStarter]: For program point ULTIMATE.initErr0EnsuresViolation(lines 1 43) no Hoare annotation was computed. [2018-01-21 00:42:52,986 INFO L401 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(lines 1 43) no Hoare annotation was computed. [2018-01-21 00:42:52,986 INFO L404 ceAbstractionStarter]: At program point ULTIMATE.initENTRY(lines 1 43) the Hoare annotation is: true [2018-01-21 00:42:52,986 INFO L401 ceAbstractionStarter]: For program point ULTIMATE.initFINAL(lines 1 43) no Hoare annotation was computed. [2018-01-21 00:42:52,986 INFO L401 ceAbstractionStarter]: For program point fooEXIT(lines 20 29) no Hoare annotation was computed. [2018-01-21 00:42:52,986 INFO L401 ceAbstractionStarter]: For program point L21(line 21) no Hoare annotation was computed. [2018-01-21 00:42:52,986 INFO L401 ceAbstractionStarter]: For program point L23(line 23) no Hoare annotation was computed. [2018-01-21 00:42:52,987 INFO L401 ceAbstractionStarter]: For program point L22(lines 22 24) no Hoare annotation was computed. [2018-01-21 00:42:52,987 INFO L401 ceAbstractionStarter]: For program point L25(line 25) no Hoare annotation was computed. [2018-01-21 00:42:52,987 INFO L401 ceAbstractionStarter]: For program point L23'(line 23) no Hoare annotation was computed. [2018-01-21 00:42:52,987 INFO L401 ceAbstractionStarter]: For program point L21'''''(line 21) no Hoare annotation was computed. [2018-01-21 00:42:52,987 INFO L401 ceAbstractionStarter]: For program point L25'(lines 25 27) no Hoare annotation was computed. [2018-01-21 00:42:52,987 INFO L401 ceAbstractionStarter]: For program point L21'''(line 21) no Hoare annotation was computed. [2018-01-21 00:42:52,987 INFO L401 ceAbstractionStarter]: For program point L21'(line 21) no Hoare annotation was computed. [2018-01-21 00:42:52,988 INFO L401 ceAbstractionStarter]: For program point fooFINAL(lines 20 29) no Hoare annotation was computed. [2018-01-21 00:42:52,988 INFO L404 ceAbstractionStarter]: At program point fooENTRY(lines 20 29) the Hoare annotation is: true [2018-01-21 00:42:52,988 INFO L401 ceAbstractionStarter]: For program point L22''(lines 22 24) no Hoare annotation was computed. [2018-01-21 00:42:52,988 INFO L401 ceAbstractionStarter]: For program point L23''(line 23) no Hoare annotation was computed. [2018-01-21 00:42:52,988 INFO L401 ceAbstractionStarter]: For program point L21''(line 21) no Hoare annotation was computed. [2018-01-21 00:42:52,988 INFO L404 ceAbstractionStarter]: At program point L22''''(lines 22 24) the Hoare annotation is: true [2018-01-21 00:42:52,989 INFO L404 ceAbstractionStarter]: At program point L22'''(lines 22 24) the Hoare annotation is: true [2018-01-21 00:42:52,989 INFO L401 ceAbstractionStarter]: For program point fooErr0EnsuresViolation(lines 20 29) no Hoare annotation was computed. [2018-01-21 00:42:52,989 INFO L401 ceAbstractionStarter]: For program point L21''''(line 21) no Hoare annotation was computed. [2018-01-21 00:42:52,989 INFO L404 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(lines 1 43) the Hoare annotation is: true [2018-01-21 00:42:52,989 INFO L401 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(lines 1 43) no Hoare annotation was computed. [2018-01-21 00:42:52,989 INFO L404 ceAbstractionStarter]: At program point L1(lines 1 43) the Hoare annotation is: true [2018-01-21 00:42:52,990 INFO L401 ceAbstractionStarter]: For program point ULTIMATE.startErr0EnsuresViolation(lines 1 43) no Hoare annotation was computed. [2018-01-21 00:42:52,990 INFO L401 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(lines 1 43) no Hoare annotation was computed. [2018-01-21 00:42:52,990 INFO L404 ceAbstractionStarter]: At program point L36''(lines 36 40) the Hoare annotation is: true [2018-01-21 00:42:52,990 INFO L401 ceAbstractionStarter]: For program point L33''(lines 33 35) no Hoare annotation was computed. [2018-01-21 00:42:52,990 INFO L401 ceAbstractionStarter]: For program point L34''(line 34) no Hoare annotation was computed. [2018-01-21 00:42:52,990 INFO L404 ceAbstractionStarter]: At program point L33'''(lines 33 35) the Hoare annotation is: true [2018-01-21 00:42:52,991 INFO L401 ceAbstractionStarter]: For program point L32''(line 32) no Hoare annotation was computed. [2018-01-21 00:42:52,991 INFO L401 ceAbstractionStarter]: For program point L37'(line 37) no Hoare annotation was computed. [2018-01-21 00:42:52,991 INFO L401 ceAbstractionStarter]: For program point L32''''(line 32) no Hoare annotation was computed. [2018-01-21 00:42:52,991 INFO L401 ceAbstractionStarter]: For program point L32'''''(line 32) no Hoare annotation was computed. [2018-01-21 00:42:52,991 INFO L401 ceAbstractionStarter]: For program point mainErr0EnsuresViolation(lines 31 42) no Hoare annotation was computed. [2018-01-21 00:42:52,991 INFO L401 ceAbstractionStarter]: For program point L36'''(lines 36 40) no Hoare annotation was computed. [2018-01-21 00:42:52,991 INFO L401 ceAbstractionStarter]: For program point mainFINAL(lines 31 42) no Hoare annotation was computed. [2018-01-21 00:42:52,992 INFO L401 ceAbstractionStarter]: For program point L32(line 32) no Hoare annotation was computed. [2018-01-21 00:42:52,992 INFO L401 ceAbstractionStarter]: For program point L32'''(line 32) no Hoare annotation was computed. [2018-01-21 00:42:52,992 INFO L404 ceAbstractionStarter]: At program point L34(line 34) the Hoare annotation is: true [2018-01-21 00:42:52,992 INFO L401 ceAbstractionStarter]: For program point L33(lines 33 35) no Hoare annotation was computed. [2018-01-21 00:42:52,992 INFO L401 ceAbstractionStarter]: For program point L34'''(line 34) no Hoare annotation was computed. [2018-01-21 00:42:52,992 INFO L401 ceAbstractionStarter]: For program point L33''''(lines 33 35) no Hoare annotation was computed. [2018-01-21 00:42:52,993 INFO L401 ceAbstractionStarter]: For program point L36(lines 36 40) no Hoare annotation was computed. [2018-01-21 00:42:52,993 INFO L401 ceAbstractionStarter]: For program point mainEXIT(lines 31 42) no Hoare annotation was computed. [2018-01-21 00:42:52,993 INFO L404 ceAbstractionStarter]: At program point mainENTRY(lines 31 42) the Hoare annotation is: true [2018-01-21 00:42:52,993 INFO L401 ceAbstractionStarter]: For program point L38(line 38) no Hoare annotation was computed. [2018-01-21 00:42:52,993 INFO L401 ceAbstractionStarter]: For program point L37(line 37) no Hoare annotation was computed. [2018-01-21 00:42:52,993 INFO L401 ceAbstractionStarter]: For program point L34'(line 34) no Hoare annotation was computed. [2018-01-21 00:42:52,994 INFO L401 ceAbstractionStarter]: For program point L32'(line 32) no Hoare annotation was computed. [2018-01-21 00:42:52,997 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 00:42:52,998 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 00:42:52,998 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 00:42:52,998 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 00:42:52,998 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 00:42:52,998 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 00:42:52,998 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 00:42:52,999 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.initErr0EnsuresViolation======== [2018-01-21 00:42:52,999 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 00:42:53,001 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states. [2018-01-21 00:42:53,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-01-21 00:42:53,002 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 00:42:53,002 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-01-21 00:42:53,002 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.initErr0EnsuresViolation]=== [2018-01-21 00:42:53,002 INFO L82 PathProgramCache]: Analyzing trace with hash 136143, now seen corresponding path program 1 times [2018-01-21 00:42:53,002 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 00:42:53,004 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:42:53,004 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 00:42:53,004 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:42:53,004 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 00:42:53,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 00:42:53,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 00:42:53,035 INFO L381 BasicCegarLoop]: Counterexample might be feasible [2018-01-21 00:42:53,041 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 00:42:53,046 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 00:42:53,046 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 00:42:53,046 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 00:42:53,046 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 00:42:53,046 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 00:42:53,046 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 00:42:53,046 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 00:42:53,046 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooErr0EnsuresViolation======== [2018-01-21 00:42:53,046 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 00:42:53,048 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states. [2018-01-21 00:42:53,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-01-21 00:42:53,050 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 00:42:53,050 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 00:42:53,050 INFO L371 AbstractCegarLoop]: === Iteration 1 === [fooErr0EnsuresViolation]=== [2018-01-21 00:42:53,051 INFO L82 PathProgramCache]: Analyzing trace with hash 1220349549, now seen corresponding path program 1 times [2018-01-21 00:42:53,051 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 00:42:53,051 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:42:53,052 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 00:42:53,052 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:42:53,052 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 00:42:53,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 00:42:53,068 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 00:42:53,089 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-21 00:42:53,089 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 00:42:53,089 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-21 00:42:53,090 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 00:42:53,090 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-21 00:42:53,090 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-21 00:42:53,090 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-21 00:42:53,091 INFO L87 Difference]: Start difference. First operand 62 states. Second operand 2 states. [2018-01-21 00:42:53,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 00:42:53,100 INFO L93 Difference]: Finished difference Result 114 states and 135 transitions. [2018-01-21 00:42:53,100 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-21 00:42:53,100 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 26 [2018-01-21 00:42:53,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 00:42:53,103 INFO L225 Difference]: With dead ends: 114 [2018-01-21 00:42:53,103 INFO L226 Difference]: Without dead ends: 43 [2018-01-21 00:42:53,104 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-21 00:42:53,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-01-21 00:42:53,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-01-21 00:42:53,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-01-21 00:42:53,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 46 transitions. [2018-01-21 00:42:53,116 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 46 transitions. Word has length 26 [2018-01-21 00:42:53,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 00:42:53,117 INFO L432 AbstractCegarLoop]: Abstraction has 43 states and 46 transitions. [2018-01-21 00:42:53,117 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-21 00:42:53,117 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 46 transitions. [2018-01-21 00:42:53,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-01-21 00:42:53,118 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 00:42:53,118 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 00:42:53,118 INFO L371 AbstractCegarLoop]: === Iteration 2 === [fooErr0EnsuresViolation]=== [2018-01-21 00:42:53,118 INFO L82 PathProgramCache]: Analyzing trace with hash 390316661, now seen corresponding path program 1 times [2018-01-21 00:42:53,118 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 00:42:53,119 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:42:53,119 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 00:42:53,120 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:42:53,120 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 00:42:53,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 00:42:53,146 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 00:42:53,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-21 00:42:53,285 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 00:42:53,285 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2018-01-21 00:42:53,285 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 00:42:53,287 INFO L409 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-01-21 00:42:53,287 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-01-21 00:42:53,288 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-01-21 00:42:53,288 INFO L87 Difference]: Start difference. First operand 43 states and 46 transitions. Second operand 7 states. [2018-01-21 00:42:53,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 00:42:53,456 INFO L93 Difference]: Finished difference Result 112 states and 124 transitions. [2018-01-21 00:42:53,457 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-01-21 00:42:53,457 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 28 [2018-01-21 00:42:53,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 00:42:53,461 INFO L225 Difference]: With dead ends: 112 [2018-01-21 00:42:53,461 INFO L226 Difference]: Without dead ends: 77 [2018-01-21 00:42:53,463 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2018-01-21 00:42:53,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-01-21 00:42:53,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 69. [2018-01-21 00:42:53,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-01-21 00:42:53,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 77 transitions. [2018-01-21 00:42:53,481 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 77 transitions. Word has length 28 [2018-01-21 00:42:53,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 00:42:53,482 INFO L432 AbstractCegarLoop]: Abstraction has 69 states and 77 transitions. [2018-01-21 00:42:53,482 INFO L433 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-01-21 00:42:53,482 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 77 transitions. [2018-01-21 00:42:53,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-01-21 00:42:53,484 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 00:42:53,484 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] [2018-01-21 00:42:53,485 INFO L371 AbstractCegarLoop]: === Iteration 3 === [fooErr0EnsuresViolation]=== [2018-01-21 00:42:53,485 INFO L82 PathProgramCache]: Analyzing trace with hash 2078164222, now seen corresponding path program 1 times [2018-01-21 00:42:53,485 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 00:42:53,486 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:42:53,486 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 00:42:53,486 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:42:53,486 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 00:42:53,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 00:42:53,509 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 00:42:53,608 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-01-21 00:42:53,608 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 00:42:53,609 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-21 00:42:53,609 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 00:42:53,609 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-21 00:42:53,609 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-21 00:42:53,609 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-21 00:42:53,610 INFO L87 Difference]: Start difference. First operand 69 states and 77 transitions. Second operand 4 states. [2018-01-21 00:42:53,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 00:42:53,721 INFO L93 Difference]: Finished difference Result 69 states and 77 transitions. [2018-01-21 00:42:53,762 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-21 00:42:53,762 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 33 [2018-01-21 00:42:53,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 00:42:53,763 INFO L225 Difference]: With dead ends: 69 [2018-01-21 00:42:53,763 INFO L226 Difference]: Without dead ends: 0 [2018-01-21 00:42:53,764 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-01-21 00:42:53,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-01-21 00:42:53,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-01-21 00:42:53,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-01-21 00:42:53,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-01-21 00:42:53,764 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 33 [2018-01-21 00:42:53,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 00:42:53,764 INFO L432 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-01-21 00:42:53,764 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-21 00:42:53,765 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-01-21 00:42:53,765 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-01-21 00:42:53,766 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 00:42:53,766 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 00:42:53,766 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 00:42:53,766 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 00:42:53,766 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 00:42:53,767 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 00:42:53,767 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 00:42:53,767 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.startErr0EnsuresViolation======== [2018-01-21 00:42:53,767 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 00:42:53,768 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states. [2018-01-21 00:42:53,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-01-21 00:42:53,769 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 00:42:53,769 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 00:42:53,769 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 00:42:53,769 INFO L82 PathProgramCache]: Analyzing trace with hash -851979775, now seen corresponding path program 1 times [2018-01-21 00:42:53,769 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 00:42:53,770 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:42:53,770 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 00:42:53,770 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:42:53,770 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 00:42:53,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 00:42:53,775 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 00:42:53,782 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-21 00:42:53,782 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 00:42:53,782 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-21 00:42:53,782 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 00:42:53,783 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-21 00:42:53,783 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-21 00:42:53,783 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-21 00:42:53,783 INFO L87 Difference]: Start difference. First operand 62 states. Second operand 2 states. [2018-01-21 00:42:53,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 00:42:53,789 INFO L93 Difference]: Finished difference Result 114 states and 135 transitions. [2018-01-21 00:42:53,789 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-21 00:42:53,789 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 17 [2018-01-21 00:42:53,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 00:42:53,790 INFO L225 Difference]: With dead ends: 114 [2018-01-21 00:42:53,790 INFO L226 Difference]: Without dead ends: 57 [2018-01-21 00:42:53,791 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-21 00:42:53,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-01-21 00:42:53,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-01-21 00:42:53,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-01-21 00:42:53,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 62 transitions. [2018-01-21 00:42:53,796 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 62 transitions. Word has length 17 [2018-01-21 00:42:53,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 00:42:53,796 INFO L432 AbstractCegarLoop]: Abstraction has 57 states and 62 transitions. [2018-01-21 00:42:53,796 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-21 00:42:53,796 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 62 transitions. [2018-01-21 00:42:53,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-01-21 00:42:53,797 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 00:42:53,797 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 00:42:53,797 INFO L371 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 00:42:53,797 INFO L82 PathProgramCache]: Analyzing trace with hash -178858898, now seen corresponding path program 1 times [2018-01-21 00:42:53,797 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 00:42:53,798 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:42:53,798 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 00:42:53,798 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:42:53,798 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 00:42:53,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 00:42:53,803 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 00:42:53,831 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-21 00:42:53,831 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 00:42:53,831 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-21 00:42:53,832 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 00:42:53,832 INFO L409 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-01-21 00:42:53,832 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-01-21 00:42:53,832 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-01-21 00:42:53,833 INFO L87 Difference]: Start difference. First operand 57 states and 62 transitions. Second operand 3 states. [2018-01-21 00:42:53,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 00:42:53,852 INFO L93 Difference]: Finished difference Result 76 states and 84 transitions. [2018-01-21 00:42:53,853 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-01-21 00:42:53,853 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2018-01-21 00:42:53,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 00:42:53,854 INFO L225 Difference]: With dead ends: 76 [2018-01-21 00:42:53,854 INFO L226 Difference]: Without dead ends: 61 [2018-01-21 00:42:53,855 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-01-21 00:42:53,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-01-21 00:42:53,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 56. [2018-01-21 00:42:53,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-01-21 00:42:53,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 60 transitions. [2018-01-21 00:42:53,862 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 60 transitions. Word has length 19 [2018-01-21 00:42:53,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 00:42:53,862 INFO L432 AbstractCegarLoop]: Abstraction has 56 states and 60 transitions. [2018-01-21 00:42:53,862 INFO L433 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-01-21 00:42:53,862 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 60 transitions. [2018-01-21 00:42:53,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-01-21 00:42:53,864 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 00:42:53,864 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 00:42:53,864 INFO L371 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 00:42:53,864 INFO L82 PathProgramCache]: Analyzing trace with hash -853032378, now seen corresponding path program 1 times [2018-01-21 00:42:53,864 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 00:42:53,865 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:42:53,865 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 00:42:53,865 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:42:53,865 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 00:42:53,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 00:42:53,879 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 00:42:53,926 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 00:42:53,926 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 00:42:53,927 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-21 00:42:53,928 INFO L199 CegarAbsIntRunner]: Running AI on error trace of length 47 with the following transitions: [2018-01-21 00:42:53,930 INFO L201 CegarAbsIntRunner]: [0], [4], [7], [17], [18], [20], [21], [23], [24], [25], [29], [32], [44], [50], [51], [52], [53], [58], [59], [60], [61], [65], [68], [70], [72], [73], [74], [76], [80], [84], [89], [90], [93], [95], [96], [97], [106], [108], [109], [110], [111], [112], [113], [114], [115] [2018-01-21 00:42:53,978 INFO L147 AbstractInterpreter]: Using domain VPDomain [2018-01-21 00:42:53,978 INFO L101 FixpointEngine]: Starting fixpoint engine with domain VPDomain (maxUnwinding=3, maxParallelStates=2) [2018-01-21 00:42:54,274 INFO L259 AbstractInterpreter]: Some error location(s) were reachable [2018-01-21 00:42:54,276 INFO L268 AbstractInterpreter]: Visited 45 different actions 82 times. Merged at 19 different actions 19 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 23 variables. [2018-01-21 00:42:54,292 INFO L434 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-01-21 00:42:54,292 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 00:42:54,292 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-21 00:42:54,307 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 00:42:54,307 INFO L280 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-01-21 00:42:54,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 00:42:54,356 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-21 00:42:54,480 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-21 00:42:54,480 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-21 00:42:54,954 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-21 00:42:54,977 INFO L320 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-01-21 00:42:54,977 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [4] total 11 [2018-01-21 00:42:54,977 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 00:42:54,977 INFO L409 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-01-21 00:42:54,978 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-01-21 00:42:54,978 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2018-01-21 00:42:54,978 INFO L87 Difference]: Start difference. First operand 56 states and 60 transitions. Second operand 7 states. [2018-01-21 00:42:55,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 00:42:55,067 INFO L93 Difference]: Finished difference Result 118 states and 128 transitions. [2018-01-21 00:42:55,067 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-01-21 00:42:55,067 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 46 [2018-01-21 00:42:55,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 00:42:55,068 INFO L225 Difference]: With dead ends: 118 [2018-01-21 00:42:55,068 INFO L226 Difference]: Without dead ends: 61 [2018-01-21 00:42:55,069 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 81 SyntacticMatches, 5 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2018-01-21 00:42:55,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-01-21 00:42:55,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 58. [2018-01-21 00:42:55,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-01-21 00:42:55,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 62 transitions. [2018-01-21 00:42:55,073 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 62 transitions. Word has length 46 [2018-01-21 00:42:55,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 00:42:55,073 INFO L432 AbstractCegarLoop]: Abstraction has 58 states and 62 transitions. [2018-01-21 00:42:55,073 INFO L433 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-01-21 00:42:55,074 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 62 transitions. [2018-01-21 00:42:55,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-01-21 00:42:55,075 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 00:42:55,075 INFO L322 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 00:42:55,075 INFO L371 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 00:42:55,075 INFO L82 PathProgramCache]: Analyzing trace with hash -1793846129, now seen corresponding path program 1 times [2018-01-21 00:42:55,075 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 00:42:55,076 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:42:55,076 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 00:42:55,076 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:42:55,076 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 00:42:55,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 00:42:55,092 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 00:42:55,130 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-01-21 00:42:55,131 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 00:42:55,131 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-21 00:42:55,131 INFO L199 CegarAbsIntRunner]: Running AI on error trace of length 52 with the following transitions: [2018-01-21 00:42:55,131 INFO L201 CegarAbsIntRunner]: [0], [4], [7], [9], [10], [11], [13], [17], [18], [20], [21], [23], [24], [25], [29], [32], [44], [50], [51], [52], [53], [58], [59], [60], [61], [65], [68], [70], [72], [73], [74], [76], [80], [84], [89], [90], [93], [95], [96], [97], [106], [108], [109], [110], [111], [112], [113], [114], [115] [2018-01-21 00:42:55,133 INFO L147 AbstractInterpreter]: Using domain VPDomain [2018-01-21 00:42:55,133 INFO L101 FixpointEngine]: Starting fixpoint engine with domain VPDomain (maxUnwinding=3, maxParallelStates=2) [2018-01-21 00:42:55,347 INFO L259 AbstractInterpreter]: Some error location(s) were reachable [2018-01-21 00:42:55,347 INFO L268 AbstractInterpreter]: Visited 49 different actions 112 times. Merged at 29 different actions 39 times. Never widened. Found 5 fixpoints after 3 different actions. Largest state had 23 variables. [2018-01-21 00:42:55,349 INFO L434 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-01-21 00:42:55,350 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 00:42:55,350 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-21 00:42:55,361 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 00:42:55,361 INFO L280 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-01-21 00:42:55,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 00:42:55,393 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-21 00:42:55,420 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-01-21 00:42:55,421 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-21 00:42:55,461 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-01-21 00:42:55,481 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 00:42:55,482 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 4 with cvc4 --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with cvc4 --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-01-21 00:42:55,485 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 00:42:55,485 INFO L280 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-01-21 00:42:55,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 00:42:55,523 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-21 00:42:55,527 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-01-21 00:42:55,528 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-21 00:42:55,560 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-01-21 00:42:55,565 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-01-21 00:42:55,565 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4] total 7 [2018-01-21 00:42:55,566 INFO L247 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-01-21 00:42:55,566 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-21 00:42:55,566 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-21 00:42:55,566 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-01-21 00:42:55,566 INFO L87 Difference]: Start difference. First operand 58 states and 62 transitions. Second operand 5 states. [2018-01-21 00:42:55,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 00:42:55,603 INFO L93 Difference]: Finished difference Result 82 states and 89 transitions. [2018-01-21 00:42:55,603 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-01-21 00:42:55,604 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 51 [2018-01-21 00:42:55,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 00:42:55,605 INFO L225 Difference]: With dead ends: 82 [2018-01-21 00:42:55,605 INFO L226 Difference]: Without dead ends: 70 [2018-01-21 00:42:55,606 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-01-21 00:42:55,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2018-01-21 00:42:55,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 65. [2018-01-21 00:42:55,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-01-21 00:42:55,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 70 transitions. [2018-01-21 00:42:55,612 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 70 transitions. Word has length 51 [2018-01-21 00:42:55,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 00:42:55,613 INFO L432 AbstractCegarLoop]: Abstraction has 65 states and 70 transitions. [2018-01-21 00:42:55,613 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-21 00:42:55,613 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 70 transitions. [2018-01-21 00:42:55,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2018-01-21 00:42:55,615 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 00:42:55,615 INFO L322 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 00:42:55,615 INFO L371 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 00:42:55,615 INFO L82 PathProgramCache]: Analyzing trace with hash 988850019, now seen corresponding path program 2 times [2018-01-21 00:42:55,615 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 00:42:55,616 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:42:55,616 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 00:42:55,616 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:42:55,616 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 00:42:55,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 00:42:55,640 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 00:42:55,729 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2018-01-21 00:42:55,730 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 00:42:55,730 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-21 00:42:55,730 INFO L183 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-01-21 00:42:55,730 INFO L434 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-01-21 00:42:55,730 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 00:42:55,730 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 00:42:55,742 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-21 00:42:55,743 INFO L280 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-01-21 00:42:55,761 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-21 00:42:55,780 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-21 00:42:55,787 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-21 00:42:55,792 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-21 00:42:55,936 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-01-21 00:42:55,936 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-21 00:42:56,124 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-01-21 00:42:56,145 INFO L320 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-01-21 00:42:56,145 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [5] total 12 [2018-01-21 00:42:56,145 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 00:42:56,146 INFO L409 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-01-21 00:42:56,146 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-01-21 00:42:56,146 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2018-01-21 00:42:56,146 INFO L87 Difference]: Start difference. First operand 65 states and 70 transitions. Second operand 7 states. [2018-01-21 00:42:56,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 00:42:56,297 INFO L93 Difference]: Finished difference Result 128 states and 141 transitions. [2018-01-21 00:42:56,297 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-01-21 00:42:56,297 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 81 [2018-01-21 00:42:56,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 00:42:56,299 INFO L225 Difference]: With dead ends: 128 [2018-01-21 00:42:56,299 INFO L226 Difference]: Without dead ends: 80 [2018-01-21 00:42:56,300 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 153 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2018-01-21 00:42:56,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2018-01-21 00:42:56,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 76. [2018-01-21 00:42:56,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2018-01-21 00:42:56,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 84 transitions. [2018-01-21 00:42:56,308 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 84 transitions. Word has length 81 [2018-01-21 00:42:56,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 00:42:56,308 INFO L432 AbstractCegarLoop]: Abstraction has 76 states and 84 transitions. [2018-01-21 00:42:56,308 INFO L433 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-01-21 00:42:56,308 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 84 transitions. [2018-01-21 00:42:56,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2018-01-21 00:42:56,310 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 00:42:56,310 INFO L322 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 00:42:56,311 INFO L371 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 00:42:56,311 INFO L82 PathProgramCache]: Analyzing trace with hash 1383712123, now seen corresponding path program 1 times [2018-01-21 00:42:56,311 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 00:42:56,312 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:42:56,312 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-21 00:42:56,312 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:42:56,312 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 00:42:56,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 00:42:56,336 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 00:42:56,423 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2018-01-21 00:42:56,423 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 00:42:56,424 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-21 00:42:56,424 INFO L199 CegarAbsIntRunner]: Running AI on error trace of length 88 with the following transitions: [2018-01-21 00:42:56,424 INFO L201 CegarAbsIntRunner]: [0], [4], [7], [9], [10], [11], [13], [17], [18], [20], [21], [23], [24], [25], [29], [32], [34], [35], [36], [37], [39], [44], [50], [51], [52], [53], [58], [59], [60], [61], [65], [68], [70], [72], [73], [74], [76], [80], [84], [89], [90], [93], [95], [96], [97], [106], [108], [109], [110], [111], [112], [113], [114], [115] [2018-01-21 00:42:56,426 INFO L147 AbstractInterpreter]: Using domain VPDomain [2018-01-21 00:42:56,426 INFO L101 FixpointEngine]: Starting fixpoint engine with domain VPDomain (maxUnwinding=3, maxParallelStates=2) [2018-01-21 00:42:56,750 INFO L259 AbstractInterpreter]: Some error location(s) were reachable [2018-01-21 00:42:56,750 INFO L268 AbstractInterpreter]: Visited 54 different actions 200 times. Merged at 40 different actions 93 times. Never widened. Found 13 fixpoints after 4 different actions. Largest state had 25 variables. [2018-01-21 00:42:56,758 INFO L434 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-01-21 00:42:56,758 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 00:42:56,758 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-21 00:42:56,767 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 00:42:56,767 INFO L280 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-01-21 00:42:56,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 00:42:56,807 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-21 00:42:56,933 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 38 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-01-21 00:42:56,934 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-21 00:42:57,245 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 38 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-01-21 00:42:57,266 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 00:42:57,266 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 7 with cvc4 --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with cvc4 --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-01-21 00:42:57,271 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 00:42:57,272 INFO L280 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-01-21 00:42:57,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 00:42:57,324 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-21 00:42:57,362 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2018-01-21 00:42:57,363 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-21 00:42:57,423 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2018-01-21 00:42:57,425 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-01-21 00:42:57,425 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 9, 9, 5, 5] total 19 [2018-01-21 00:42:57,425 INFO L247 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-01-21 00:42:57,426 INFO L409 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-01-21 00:42:57,426 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-01-21 00:42:57,426 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2018-01-21 00:42:57,426 INFO L87 Difference]: Start difference. First operand 76 states and 84 transitions. Second operand 12 states. [2018-01-21 00:42:57,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 00:42:57,619 INFO L93 Difference]: Finished difference Result 187 states and 215 transitions. [2018-01-21 00:42:57,619 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-01-21 00:42:57,619 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 87 [2018-01-21 00:42:57,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 00:42:57,620 INFO L225 Difference]: With dead ends: 187 [2018-01-21 00:42:57,620 INFO L226 Difference]: Without dead ends: 119 [2018-01-21 00:42:57,621 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 356 GetRequests, 329 SyntacticMatches, 6 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2018-01-21 00:42:57,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2018-01-21 00:42:57,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 100. [2018-01-21 00:42:57,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2018-01-21 00:42:57,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 110 transitions. [2018-01-21 00:42:57,632 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 110 transitions. Word has length 87 [2018-01-21 00:42:57,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 00:42:57,633 INFO L432 AbstractCegarLoop]: Abstraction has 100 states and 110 transitions. [2018-01-21 00:42:57,633 INFO L433 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-01-21 00:42:57,633 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 110 transitions. [2018-01-21 00:42:57,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2018-01-21 00:42:57,634 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 00:42:57,634 INFO L322 BasicCegarLoop]: trace histogram [8, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 00:42:57,634 INFO L371 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 00:42:57,634 INFO L82 PathProgramCache]: Analyzing trace with hash -762611473, now seen corresponding path program 2 times [2018-01-21 00:42:57,635 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 00:42:57,635 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:42:57,635 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 00:42:57,635 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:42:57,635 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 00:42:57,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 00:42:57,665 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 00:42:57,770 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 152 trivial. 0 not checked. [2018-01-21 00:42:57,771 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 00:42:57,771 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-21 00:42:57,771 INFO L183 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-01-21 00:42:57,771 INFO L434 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-01-21 00:42:57,771 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 00:42:57,771 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-21 00:42:57,782 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-21 00:42:57,782 INFO L280 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-01-21 00:42:57,803 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-21 00:42:57,831 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-21 00:42:57,836 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-21 00:42:57,842 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-21 00:42:57,910 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 61 proven. 2 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2018-01-21 00:42:57,911 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-21 00:42:58,181 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 61 proven. 2 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2018-01-21 00:42:58,203 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 00:42:58,203 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 9 with cvc4 --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with cvc4 --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-01-21 00:42:58,206 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-21 00:42:58,207 INFO L280 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-01-21 00:42:58,225 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-21 00:42:58,274 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-21 00:42:58,314 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-21 00:42:58,321 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-21 00:42:58,348 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 152 trivial. 0 not checked. [2018-01-21 00:42:58,349 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-21 00:42:58,432 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 152 trivial. 0 not checked. [2018-01-21 00:42:58,434 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-01-21 00:42:58,434 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 9, 6, 6] total 21 [2018-01-21 00:42:58,434 INFO L247 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-01-21 00:42:58,435 INFO L409 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-01-21 00:42:58,435 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-01-21 00:42:58,435 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2018-01-21 00:42:58,435 INFO L87 Difference]: Start difference. First operand 100 states and 110 transitions. Second operand 13 states. [2018-01-21 00:42:58,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 00:42:58,607 INFO L93 Difference]: Finished difference Result 265 states and 302 transitions. [2018-01-21 00:42:58,608 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-01-21 00:42:58,608 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 133 [2018-01-21 00:42:58,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 00:42:58,609 INFO L225 Difference]: With dead ends: 265 [2018-01-21 00:42:58,609 INFO L226 Difference]: Without dead ends: 191 [2018-01-21 00:42:58,610 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 545 GetRequests, 515 SyntacticMatches, 5 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=152, Invalid=550, Unknown=0, NotChecked=0, Total=702 [2018-01-21 00:42:58,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2018-01-21 00:42:58,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 133. [2018-01-21 00:42:58,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2018-01-21 00:42:58,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 147 transitions. [2018-01-21 00:42:58,624 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 147 transitions. Word has length 133 [2018-01-21 00:42:58,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 00:42:58,625 INFO L432 AbstractCegarLoop]: Abstraction has 133 states and 147 transitions. [2018-01-21 00:42:58,625 INFO L433 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-01-21 00:42:58,625 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 147 transitions. [2018-01-21 00:42:58,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2018-01-21 00:42:58,627 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 00:42:58,627 INFO L322 BasicCegarLoop]: trace histogram [11, 9, 7, 7, 7, 7, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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 00:42:58,627 INFO L371 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 00:42:58,628 INFO L82 PathProgramCache]: Analyzing trace with hash 177172698, now seen corresponding path program 3 times [2018-01-21 00:42:58,628 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 00:42:58,628 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:42:58,628 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-21 00:42:58,628 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:42:58,629 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 00:42:58,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 00:42:58,661 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 00:42:58,780 INFO L134 CoverageAnalysis]: Checked inductivity of 419 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 369 trivial. 0 not checked. [2018-01-21 00:42:58,781 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 00:42:58,781 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-21 00:42:58,781 INFO L183 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-01-21 00:42:58,781 INFO L434 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-01-21 00:42:58,781 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 00:42:58,781 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-21 00:42:58,788 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-21 00:42:58,788 INFO L280 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-01-21 00:42:58,803 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-21 00:42:58,809 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-21 00:42:58,816 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-21 00:42:58,826 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-21 00:42:58,828 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-21 00:42:58,831 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-21 00:42:58,894 INFO L134 CoverageAnalysis]: Checked inductivity of 419 backedges. 107 proven. 10 refuted. 0 times theorem prover too weak. 302 trivial. 0 not checked. [2018-01-21 00:42:58,894 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-21 00:42:59,079 INFO L134 CoverageAnalysis]: Checked inductivity of 419 backedges. 107 proven. 10 refuted. 0 times theorem prover too weak. 302 trivial. 0 not checked. [2018-01-21 00:42:59,100 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 00:42:59,100 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 11 with cvc4 --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with cvc4 --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-01-21 00:42:59,103 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-21 00:42:59,103 INFO L280 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-01-21 00:42:59,124 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-21 00:42:59,138 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-21 00:42:59,165 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-21 00:42:59,222 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-21 00:42:59,245 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-21 00:42:59,252 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-21 00:42:59,348 INFO L134 CoverageAnalysis]: Checked inductivity of 419 backedges. 194 proven. 9 refuted. 0 times theorem prover too weak. 216 trivial. 0 not checked. [2018-01-21 00:42:59,348 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-21 00:42:59,661 INFO L134 CoverageAnalysis]: Checked inductivity of 419 backedges. 194 proven. 9 refuted. 0 times theorem prover too weak. 216 trivial. 0 not checked. [2018-01-21 00:42:59,663 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-01-21 00:42:59,663 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9, 10, 10] total 28 [2018-01-21 00:42:59,663 INFO L247 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-01-21 00:42:59,664 INFO L409 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-01-21 00:42:59,664 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-01-21 00:42:59,664 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=622, Unknown=0, NotChecked=0, Total=756 [2018-01-21 00:42:59,665 INFO L87 Difference]: Start difference. First operand 133 states and 147 transitions. Second operand 12 states. [2018-01-21 00:42:59,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 00:42:59,865 INFO L93 Difference]: Finished difference Result 297 states and 345 transitions. [2018-01-21 00:42:59,865 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-01-21 00:42:59,865 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 186 [2018-01-21 00:42:59,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 00:42:59,867 INFO L225 Difference]: With dead ends: 297 [2018-01-21 00:42:59,867 INFO L226 Difference]: Without dead ends: 285 [2018-01-21 00:42:59,868 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 757 GetRequests, 723 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 318 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=186, Invalid=806, Unknown=0, NotChecked=0, Total=992 [2018-01-21 00:42:59,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2018-01-21 00:42:59,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 187. [2018-01-21 00:42:59,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2018-01-21 00:42:59,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 211 transitions. [2018-01-21 00:42:59,887 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 211 transitions. Word has length 186 [2018-01-21 00:42:59,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 00:42:59,888 INFO L432 AbstractCegarLoop]: Abstraction has 187 states and 211 transitions. [2018-01-21 00:42:59,888 INFO L433 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-01-21 00:42:59,888 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 211 transitions. [2018-01-21 00:42:59,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2018-01-21 00:42:59,892 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 00:42:59,892 INFO L322 BasicCegarLoop]: trace histogram [14, 14, 9, 9, 9, 9, 9, 9, 9, 9, 9, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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 00:42:59,892 INFO L371 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 00:42:59,893 INFO L82 PathProgramCache]: Analyzing trace with hash 1635919095, now seen corresponding path program 4 times [2018-01-21 00:42:59,893 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 00:42:59,894 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:42:59,894 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-21 00:42:59,894 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:42:59,894 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 00:42:59,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 00:42:59,934 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 00:43:00,099 INFO L134 CoverageAnalysis]: Checked inductivity of 836 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 756 trivial. 0 not checked. [2018-01-21 00:43:00,100 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 00:43:00,100 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-21 00:43:00,100 INFO L183 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-01-21 00:43:00,100 INFO L434 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-01-21 00:43:00,100 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 00:43:00,100 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-21 00:43:00,106 INFO L101 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-01-21 00:43:00,106 INFO L280 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-01-21 00:43:00,157 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-21 00:43:00,162 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-21 00:43:00,274 INFO L134 CoverageAnalysis]: Checked inductivity of 836 backedges. 567 proven. 9 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2018-01-21 00:43:00,274 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-21 00:43:00,541 INFO L134 CoverageAnalysis]: Checked inductivity of 836 backedges. 159 proven. 189 refuted. 0 times theorem prover too weak. 488 trivial. 0 not checked. [2018-01-21 00:43:00,562 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 00:43:00,563 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 13 with cvc4 --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with cvc4 --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-01-21 00:43:00,566 INFO L101 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-01-21 00:43:00,566 INFO L280 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-01-21 00:43:00,689 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-21 00:43:00,697 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-21 00:43:00,731 INFO L134 CoverageAnalysis]: Checked inductivity of 836 backedges. 567 proven. 9 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2018-01-21 00:43:00,732 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-21 00:43:00,960 INFO L134 CoverageAnalysis]: Checked inductivity of 836 backedges. 159 proven. 189 refuted. 0 times theorem prover too weak. 488 trivial. 0 not checked. [2018-01-21 00:43:00,962 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-01-21 00:43:00,962 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 11, 11, 11] total 21 [2018-01-21 00:43:00,962 INFO L247 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-01-21 00:43:00,962 INFO L409 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-01-21 00:43:00,963 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-01-21 00:43:00,963 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2018-01-21 00:43:00,963 INFO L87 Difference]: Start difference. First operand 187 states and 211 transitions. Second operand 17 states. [2018-01-21 00:43:01,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 00:43:01,185 INFO L93 Difference]: Finished difference Result 393 states and 464 transitions. [2018-01-21 00:43:01,186 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-01-21 00:43:01,186 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 245 [2018-01-21 00:43:01,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 00:43:01,187 INFO L225 Difference]: With dead ends: 393 [2018-01-21 00:43:01,187 INFO L226 Difference]: Without dead ends: 251 [2018-01-21 00:43:01,188 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 995 GetRequests, 954 SyntacticMatches, 14 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=141, Invalid=671, Unknown=0, NotChecked=0, Total=812 [2018-01-21 00:43:01,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2018-01-21 00:43:01,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 202. [2018-01-21 00:43:01,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2018-01-21 00:43:01,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 228 transitions. [2018-01-21 00:43:01,201 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 228 transitions. Word has length 245 [2018-01-21 00:43:01,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 00:43:01,201 INFO L432 AbstractCegarLoop]: Abstraction has 202 states and 228 transitions. [2018-01-21 00:43:01,201 INFO L433 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-01-21 00:43:01,201 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 228 transitions. [2018-01-21 00:43:01,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 313 [2018-01-21 00:43:01,204 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 00:43:01,205 INFO L322 BasicCegarLoop]: trace histogram [21, 17, 15, 15, 15, 15, 11, 11, 11, 11, 11, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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 00:43:01,205 INFO L371 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 00:43:01,205 INFO L82 PathProgramCache]: Analyzing trace with hash -650410822, now seen corresponding path program 5 times [2018-01-21 00:43:01,205 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 00:43:01,205 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:43:01,206 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-21 00:43:01,206 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:43:01,206 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 00:43:01,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 00:43:01,239 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 00:43:01,541 INFO L134 CoverageAnalysis]: Checked inductivity of 1554 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 1437 trivial. 0 not checked. [2018-01-21 00:43:01,542 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 00:43:01,542 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-21 00:43:01,542 INFO L183 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-01-21 00:43:01,542 INFO L434 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-01-21 00:43:01,542 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 00:43:01,542 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-21 00:43:01,555 INFO L101 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-01-21 00:43:01,555 INFO L280 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder INSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-01-21 00:43:01,576 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-21 00:43:01,585 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-21 00:43:01,594 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-21 00:43:01,609 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-21 00:43:01,770 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-21 00:43:01,773 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-21 00:43:01,782 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-21 00:43:02,027 INFO L134 CoverageAnalysis]: Checked inductivity of 1554 backedges. 912 proven. 70 refuted. 0 times theorem prover too weak. 572 trivial. 0 not checked. [2018-01-21 00:43:02,028 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-21 00:43:02,302 INFO L134 CoverageAnalysis]: Checked inductivity of 1554 backedges. 168 proven. 256 refuted. 0 times theorem prover too weak. 1130 trivial. 0 not checked. [2018-01-21 00:43:02,322 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 00:43:02,322 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 15 with cvc4 --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with cvc4 --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-01-21 00:43:02,325 INFO L101 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-01-21 00:43:02,325 INFO L280 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder INSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-01-21 00:43:02,352 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-21 00:43:02,367 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-21 00:43:02,406 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-21 00:43:07,084 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-21 00:43:19,146 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-21 00:43:19,232 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-21 00:43:19,254 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-21 00:43:19,314 INFO L134 CoverageAnalysis]: Checked inductivity of 1554 backedges. 912 proven. 70 refuted. 0 times theorem prover too weak. 572 trivial. 0 not checked. [2018-01-21 00:43:19,315 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-21 00:43:19,646 INFO L134 CoverageAnalysis]: Checked inductivity of 1554 backedges. 168 proven. 256 refuted. 0 times theorem prover too weak. 1130 trivial. 0 not checked. [2018-01-21 00:43:19,649 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-01-21 00:43:19,649 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13, 13, 13, 13] total 26 [2018-01-21 00:43:19,649 INFO L247 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-01-21 00:43:19,650 INFO L409 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-01-21 00:43:19,650 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-01-21 00:43:19,650 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=548, Unknown=0, NotChecked=0, Total=650 [2018-01-21 00:43:19,650 INFO L87 Difference]: Start difference. First operand 202 states and 228 transitions. Second operand 20 states. [2018-01-21 00:43:20,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 00:43:20,435 INFO L93 Difference]: Finished difference Result 440 states and 507 transitions. [2018-01-21 00:43:20,435 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-01-21 00:43:20,435 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 312 [2018-01-21 00:43:20,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 00:43:20,437 INFO L225 Difference]: With dead ends: 440 [2018-01-21 00:43:20,437 INFO L226 Difference]: Without dead ends: 229 [2018-01-21 00:43:20,438 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 1277 GetRequests, 1220 SyntacticMatches, 15 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 510 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=343, Invalid=1549, Unknown=0, NotChecked=0, Total=1892 [2018-01-21 00:43:20,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2018-01-21 00:43:20,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 190. [2018-01-21 00:43:20,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2018-01-21 00:43:20,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 209 transitions. [2018-01-21 00:43:20,449 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 209 transitions. Word has length 312 [2018-01-21 00:43:20,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 00:43:20,449 INFO L432 AbstractCegarLoop]: Abstraction has 190 states and 209 transitions. [2018-01-21 00:43:20,449 INFO L433 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-01-21 00:43:20,449 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 209 transitions. [2018-01-21 00:43:20,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 377 [2018-01-21 00:43:20,451 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 00:43:20,452 INFO L322 BasicCegarLoop]: trace histogram [25, 22, 18, 18, 18, 18, 15, 15, 15, 15, 15, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 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 00:43:20,452 INFO L371 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 00:43:20,452 INFO L82 PathProgramCache]: Analyzing trace with hash 354326094, now seen corresponding path program 6 times [2018-01-21 00:43:20,452 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 00:43:20,452 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:43:20,452 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-21 00:43:20,453 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:43:20,453 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 00:43:20,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 00:43:20,491 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 00:43:20,887 INFO L134 CoverageAnalysis]: Checked inductivity of 2396 backedges. 0 proven. 161 refuted. 0 times theorem prover too weak. 2235 trivial. 0 not checked. [2018-01-21 00:43:20,888 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 00:43:20,888 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-21 00:43:20,888 INFO L183 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-01-21 00:43:20,888 INFO L434 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-01-21 00:43:20,888 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 00:43:20,888 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-21 00:43:20,893 INFO L101 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-01-21 00:43:20,894 INFO L280 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder MIX_INSIDE_OUTSIDE (IT: FPandBP) [2018-01-21 00:43:20,923 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-21 00:43:20,937 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-21 00:43:20,955 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-21 00:43:20,974 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-21 00:43:20,993 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-21 00:43:21,010 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-21 00:43:21,026 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-21 00:43:21,103 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-21 00:43:21,281 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-21 00:43:21,285 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-21 00:43:21,291 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-21 00:43:21,393 INFO L134 CoverageAnalysis]: Checked inductivity of 2396 backedges. 380 proven. 24 refuted. 0 times theorem prover too weak. 1992 trivial. 0 not checked. [2018-01-21 00:43:21,393 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-21 00:43:21,647 INFO L134 CoverageAnalysis]: Checked inductivity of 2396 backedges. 380 proven. 24 refuted. 0 times theorem prover too weak. 1992 trivial. 0 not checked. [2018-01-21 00:43:21,667 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 00:43:21,668 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 17 with cvc4 --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with cvc4 --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-01-21 00:43:21,670 INFO L101 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-01-21 00:43:21,671 INFO L280 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder MIX_INSIDE_OUTSIDE (IT: FPandBP) [2018-01-21 00:43:21,698 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-21 00:43:21,705 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-21 00:43:21,719 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-21 00:43:21,746 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-21 00:43:21,801 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-21 00:43:21,956 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-21 00:43:33,979 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-21 00:43:36,230 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-21 00:43:48,296 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-21 00:43:48,425 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-21 00:43:48,451 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-21 00:43:48,522 INFO L134 CoverageAnalysis]: Checked inductivity of 2396 backedges. 380 proven. 24 refuted. 0 times theorem prover too weak. 1992 trivial. 0 not checked. [2018-01-21 00:43:48,522 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-21 00:43:48,806 INFO L134 CoverageAnalysis]: Checked inductivity of 2396 backedges. 380 proven. 24 refuted. 0 times theorem prover too weak. 1992 trivial. 0 not checked. [2018-01-21 00:43:48,809 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-01-21 00:43:48,810 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 10] total 24 [2018-01-21 00:43:48,810 INFO L247 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-01-21 00:43:48,810 INFO L409 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-01-21 00:43:48,810 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-01-21 00:43:48,811 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=414, Unknown=0, NotChecked=0, Total=552 [2018-01-21 00:43:48,811 INFO L87 Difference]: Start difference. First operand 190 states and 209 transitions. Second operand 16 states. [2018-01-21 00:43:49,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 00:43:49,063 INFO L93 Difference]: Finished difference Result 397 states and 458 transitions. [2018-01-21 00:43:49,064 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-01-21 00:43:49,064 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 376 [2018-01-21 00:43:49,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 00:43:49,067 INFO L225 Difference]: With dead ends: 397 [2018-01-21 00:43:49,068 INFO L226 Difference]: Without dead ends: 385 [2018-01-21 00:43:49,069 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 1522 GetRequests, 1492 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=208, Invalid=604, Unknown=0, NotChecked=0, Total=812 [2018-01-21 00:43:49,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2018-01-21 00:43:49,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 250. [2018-01-21 00:43:49,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 250 states. [2018-01-21 00:43:49,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 281 transitions. [2018-01-21 00:43:49,086 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 281 transitions. Word has length 376 [2018-01-21 00:43:49,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 00:43:49,087 INFO L432 AbstractCegarLoop]: Abstraction has 250 states and 281 transitions. [2018-01-21 00:43:49,087 INFO L433 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-01-21 00:43:49,087 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 281 transitions. [2018-01-21 00:43:49,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 459 [2018-01-21 00:43:49,091 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 00:43:49,092 INFO L322 BasicCegarLoop]: trace histogram [30, 29, 22, 22, 22, 22, 22, 21, 21, 21, 21, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 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 00:43:49,092 INFO L371 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 00:43:49,092 INFO L82 PathProgramCache]: Analyzing trace with hash -494262934, now seen corresponding path program 7 times [2018-01-21 00:43:49,092 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 00:43:49,093 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:43:49,093 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-21 00:43:49,093 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:43:49,093 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 00:43:49,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 00:43:49,154 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 00:43:49,565 INFO L134 CoverageAnalysis]: Checked inductivity of 3840 backedges. 0 proven. 212 refuted. 0 times theorem prover too weak. 3628 trivial. 0 not checked. [2018-01-21 00:43:49,565 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 00:43:49,565 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-21 00:43:49,565 INFO L183 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-01-21 00:43:49,565 INFO L434 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-01-21 00:43:49,565 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 00:43:49,566 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-21 00:43:49,571 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 00:43:49,572 INFO L280 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-01-21 00:43:49,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 00:43:49,713 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-21 00:43:49,935 INFO L134 CoverageAnalysis]: Checked inductivity of 3840 backedges. 2140 proven. 21 refuted. 0 times theorem prover too weak. 1679 trivial. 0 not checked. [2018-01-21 00:43:49,935 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-21 00:43:50,447 INFO L134 CoverageAnalysis]: Checked inductivity of 3840 backedges. 392 proven. 657 refuted. 0 times theorem prover too weak. 2791 trivial. 0 not checked. [2018-01-21 00:43:50,483 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 00:43:50,483 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 19 with cvc4 --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with cvc4 --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-01-21 00:43:50,487 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 00:43:50,487 INFO L280 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-01-21 00:43:50,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 00:43:50,743 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-21 00:43:50,822 INFO L134 CoverageAnalysis]: Checked inductivity of 3840 backedges. 2140 proven. 21 refuted. 0 times theorem prover too weak. 1679 trivial. 0 not checked. [2018-01-21 00:43:50,822 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-21 00:43:51,354 INFO L134 CoverageAnalysis]: Checked inductivity of 3840 backedges. 392 proven. 657 refuted. 0 times theorem prover too weak. 2791 trivial. 0 not checked. [2018-01-21 00:43:51,356 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-01-21 00:43:51,356 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 13, 13, 13] total 27 [2018-01-21 00:43:51,356 INFO L247 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-01-21 00:43:51,357 INFO L409 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-01-21 00:43:51,357 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-01-21 00:43:51,358 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=580, Unknown=0, NotChecked=0, Total=702 [2018-01-21 00:43:51,358 INFO L87 Difference]: Start difference. First operand 250 states and 281 transitions. Second operand 22 states. [2018-01-21 00:43:51,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 00:43:51,888 INFO L93 Difference]: Finished difference Result 547 states and 668 transitions. [2018-01-21 00:43:51,888 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-01-21 00:43:51,888 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 458 [2018-01-21 00:43:51,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 00:43:51,892 INFO L225 Difference]: With dead ends: 547 [2018-01-21 00:43:51,892 INFO L226 Difference]: Without dead ends: 385 [2018-01-21 00:43:51,895 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 1854 GetRequests, 1801 SyntacticMatches, 16 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=253, Invalid=1229, Unknown=0, NotChecked=0, Total=1482 [2018-01-21 00:43:51,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2018-01-21 00:43:51,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 265. [2018-01-21 00:43:51,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 265 states. [2018-01-21 00:43:51,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 299 transitions. [2018-01-21 00:43:51,918 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 299 transitions. Word has length 458 [2018-01-21 00:43:51,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 00:43:51,919 INFO L432 AbstractCegarLoop]: Abstraction has 265 states and 299 transitions. [2018-01-21 00:43:51,919 INFO L433 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-01-21 00:43:51,919 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 299 transitions. [2018-01-21 00:43:51,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 547 [2018-01-21 00:43:51,923 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 00:43:51,924 INFO L322 BasicCegarLoop]: trace histogram [39, 34, 30, 30, 30, 30, 25, 25, 25, 25, 25, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 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 00:43:51,924 INFO L371 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 00:43:51,924 INFO L82 PathProgramCache]: Analyzing trace with hash 740091902, now seen corresponding path program 8 times [2018-01-21 00:43:51,924 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 00:43:51,925 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:43:51,925 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 00:43:51,925 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:43:51,925 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 00:43:51,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 00:43:51,984 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 00:43:52,702 INFO L134 CoverageAnalysis]: Checked inductivity of 5883 backedges. 0 proven. 270 refuted. 0 times theorem prover too weak. 5613 trivial. 0 not checked. [2018-01-21 00:43:52,702 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 00:43:52,702 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-21 00:43:52,702 INFO L183 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-01-21 00:43:52,702 INFO L434 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-01-21 00:43:52,702 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 00:43:52,703 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-21 00:43:52,716 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-21 00:43:52,717 INFO L280 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-01-21 00:43:52,749 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-21 00:43:52,833 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-21 00:43:52,846 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-21 00:43:52,852 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-21 00:43:53,404 INFO L134 CoverageAnalysis]: Checked inductivity of 5883 backedges. 3240 proven. 24 refuted. 0 times theorem prover too weak. 2619 trivial. 0 not checked. [2018-01-21 00:43:53,404 INFO L314 TraceCheckSpWp]: Computing backward predicates... Received shutdown request... [2018-01-21 00:43:53,614 INFO L175 TraceCheckSpWp]: Timeout while computing interpolants [2018-01-21 00:43:53,615 WARN L491 AbstractCegarLoop]: Verification canceled [2018-01-21 00:43:53,617 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 00:43:53,617 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 00:43:53,617 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 00:43:53,617 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 00:43:53,617 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 00:43:53,617 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 00:43:53,617 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 00:43:53,617 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == mainErr0EnsuresViolation======== [2018-01-21 00:43:53,618 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 00:43:53,618 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states. [2018-01-21 00:43:53,619 WARN L491 AbstractCegarLoop]: Verification canceled [2018-01-21 00:43:53,620 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.01 12:43:53 BoogieIcfgContainer [2018-01-21 00:43:53,620 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-01-21 00:43:53,621 INFO L168 Benchmark]: Toolchain (without parser) took 61565.06 ms. Allocated memory was 308.3 MB in the beginning and 941.6 MB in the end (delta: 633.3 MB). Free memory was 267.4 MB in the beginning and 887.0 MB in the end (delta: -619.6 MB). Peak memory consumption was 13.7 MB. Max. memory is 5.3 GB. [2018-01-21 00:43:53,621 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 308.3 MB. Free memory is still 272.4 MB. There was no memory consumed. Max. memory is 5.3 GB. [2018-01-21 00:43:53,621 INFO L168 Benchmark]: CACSL2BoogieTranslator took 195.09 ms. Allocated memory is still 308.3 MB. Free memory was 267.4 MB in the beginning and 258.4 MB in the end (delta: 9.0 MB). Peak memory consumption was 9.0 MB. Max. memory is 5.3 GB. [2018-01-21 00:43:53,622 INFO L168 Benchmark]: Boogie Preprocessor took 31.19 ms. Allocated memory is still 308.3 MB. Free memory was 258.4 MB in the beginning and 256.4 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 5.3 GB. [2018-01-21 00:43:53,622 INFO L168 Benchmark]: RCFGBuilder took 275.77 ms. Allocated memory is still 308.3 MB. Free memory was 256.4 MB in the beginning and 238.4 MB in the end (delta: 18.0 MB). Peak memory consumption was 18.0 MB. Max. memory is 5.3 GB. [2018-01-21 00:43:53,622 INFO L168 Benchmark]: TraceAbstraction took 61055.87 ms. Allocated memory was 308.3 MB in the beginning and 941.6 MB in the end (delta: 633.3 MB). Free memory was 238.4 MB in the beginning and 887.0 MB in the end (delta: -648.6 MB). There was no memory consumed. Max. memory is 5.3 GB. [2018-01-21 00:43:53,623 INFO L344 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 308.3 MB. Free memory is still 272.4 MB. There was no memory consumed. Max. memory is 5.3 GB. * CACSL2BoogieTranslator took 195.09 ms. Allocated memory is still 308.3 MB. Free memory was 267.4 MB in the beginning and 258.4 MB in the end (delta: 9.0 MB). Peak memory consumption was 9.0 MB. Max. memory is 5.3 GB. * Boogie Preprocessor took 31.19 ms. Allocated memory is still 308.3 MB. Free memory was 258.4 MB in the beginning and 256.4 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 5.3 GB. * RCFGBuilder took 275.77 ms. Allocated memory is still 308.3 MB. Free memory was 256.4 MB in the beginning and 238.4 MB in the end (delta: 18.0 MB). Peak memory consumption was 18.0 MB. Max. memory is 5.3 GB. * TraceAbstraction took 61055.87 ms. Allocated memory was 308.3 MB in the beginning and 941.6 MB in the end (delta: 633.3 MB). Free memory was 238.4 MB in the beginning and 887.0 MB in the end (delta: -648.6 MB). There was no memory consumed. Max. memory is 5.3 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: - StatisticsResult: ArrayEqualityDomainStatistics #Locations : 44 LocStat_MAX_WEQGRAPH_SIZE : 0 LocStat_MAX_SIZEOF_WEQEDGELABEL : 0 LocStat_NO_SUPPORTING_EQUALITIES : 339 LocStat_NO_SUPPORTING_DISEQUALITIES : 61 LocStat_NO_DISJUNCTIONS : -88 LocStat_MAX_NO_DISJUNCTIONS : -1 #Transitions : 53 TransStat_MAX_WEQGRAPH_SIZE : 0 TransStat_MAX_SIZEOF_WEQEDGELABEL : 0 TransStat_NO_SUPPORTING_EQUALITIES : 66 TransStat_NO_SUPPORTING_DISEQUALITIES : 8 TransStat_NO_DISJUNCTIONS : 53 TransStat_MAX_NO_DISJUNCTIONS : 1 - StatisticsResult: EqConstraintFactoryStatistics CONJOIN_DISJUNCTIVE(MILLISECONDS) : 0.333834 RENAME_VARIABLES(MILLISECONDS) : 0.374716 UNFREEZE(MILLISECONDS) : 0.000000 CONJOIN(MILLISECONDS) : 0.273869 PROJECTAWAY(MILLISECONDS) : 0.434046 ADD_WEAK_EQUALITY(MILLISECONDS) : 0.001173 DISJOIN(MILLISECONDS) : 0.263379 RENAME_VARIABLES_DISJUNCTIVE(MILLISECONDS) : 0.412261 ADD_EQUALITY(MILLISECONDS) : 0.042803 DISJOIN_DISJUNCTIVE(MILLISECONDS) : 0.000000 ADD_DISEQUALITY(MILLISECONDS) : 0.017063 #CONJOIN_DISJUNCTIVE : 99 #RENAME_VARIABLES : 197 #UNFREEZE : 0 #CONJOIN : 160 #PROJECTAWAY : 168 #ADD_WEAK_EQUALITY : 9 #DISJOIN : 18 #RENAME_VARIABLES_DISJUNCTIVE : 197 #ADD_EQUALITY : 67 #DISJOIN_DISJUNCTIVE : 0 #ADD_DISEQUALITY : 4 - StatisticsResult: ArrayEqualityDomainStatistics #Locations : 47 LocStat_MAX_WEQGRAPH_SIZE : 0 LocStat_MAX_SIZEOF_WEQEDGELABEL : 0 LocStat_NO_SUPPORTING_EQUALITIES : 349 LocStat_NO_SUPPORTING_DISEQUALITIES : 64 LocStat_NO_DISJUNCTIONS : -94 LocStat_MAX_NO_DISJUNCTIONS : -1 #Transitions : 57 TransStat_MAX_WEQGRAPH_SIZE : 0 TransStat_MAX_SIZEOF_WEQEDGELABEL : 0 TransStat_NO_SUPPORTING_EQUALITIES : 69 TransStat_NO_SUPPORTING_DISEQUALITIES : 8 TransStat_NO_DISJUNCTIONS : 57 TransStat_MAX_NO_DISJUNCTIONS : 1 - StatisticsResult: EqConstraintFactoryStatistics CONJOIN_DISJUNCTIVE(MILLISECONDS) : 0.487967 RENAME_VARIABLES(MILLISECONDS) : 0.296298 UNFREEZE(MILLISECONDS) : 0.000000 CONJOIN(MILLISECONDS) : 0.439810 PROJECTAWAY(MILLISECONDS) : 0.227145 ADD_WEAK_EQUALITY(MILLISECONDS) : 0.001054 DISJOIN(MILLISECONDS) : 0.206320 RENAME_VARIABLES_DISJUNCTIVE(MILLISECONDS) : 0.328730 ADD_EQUALITY(MILLISECONDS) : 0.045178 DISJOIN_DISJUNCTIVE(MILLISECONDS) : 0.000000 ADD_DISEQUALITY(MILLISECONDS) : 0.014834 #CONJOIN_DISJUNCTIVE : 129 #RENAME_VARIABLES : 263 #UNFREEZE : 0 #CONJOIN : 198 #PROJECTAWAY : 210 #ADD_WEAK_EQUALITY : 9 #DISJOIN : 21 #RENAME_VARIABLES_DISJUNCTIVE : 263 #ADD_EQUALITY : 70 #DISJOIN_DISJUNCTIVE : 0 #ADD_DISEQUALITY : 4 - StatisticsResult: ArrayEqualityDomainStatistics #Locations : 51 LocStat_MAX_WEQGRAPH_SIZE : 0 LocStat_MAX_SIZEOF_WEQEDGELABEL : 0 LocStat_NO_SUPPORTING_EQUALITIES : 387 LocStat_NO_SUPPORTING_DISEQUALITIES : 80 LocStat_NO_DISJUNCTIONS : -102 LocStat_MAX_NO_DISJUNCTIONS : -1 #Transitions : 62 TransStat_MAX_WEQGRAPH_SIZE : 0 TransStat_MAX_SIZEOF_WEQEDGELABEL : 0 TransStat_NO_SUPPORTING_EQUALITIES : 72 TransStat_NO_SUPPORTING_DISEQUALITIES : 8 TransStat_NO_DISJUNCTIONS : 62 TransStat_MAX_NO_DISJUNCTIONS : 1 - StatisticsResult: EqConstraintFactoryStatistics CONJOIN_DISJUNCTIVE(MILLISECONDS) : 0.123595 RENAME_VARIABLES(MILLISECONDS) : 0.169207 UNFREEZE(MILLISECONDS) : 0.000000 CONJOIN(MILLISECONDS) : 0.103592 PROJECTAWAY(MILLISECONDS) : 0.107775 ADD_WEAK_EQUALITY(MILLISECONDS) : 0.000734 DISJOIN(MILLISECONDS) : 0.099636 RENAME_VARIABLES_DISJUNCTIVE(MILLISECONDS) : 0.187945 ADD_EQUALITY(MILLISECONDS) : 0.022018 DISJOIN_DISJUNCTIVE(MILLISECONDS) : 0.000000 ADD_DISEQUALITY(MILLISECONDS) : 0.014715 #CONJOIN_DISJUNCTIVE : 226 #RENAME_VARIABLES : 477 #UNFREEZE : 0 #CONJOIN : 323 #PROJECTAWAY : 337 #ADD_WEAK_EQUALITY : 11 #DISJOIN : 43 #RENAME_VARIABLES_DISJUNCTIVE : 477 #ADD_EQUALITY : 74 #DISJOIN_DISJUNCTIVE : 0 #ADD_DISEQUALITY : 4 * Results from de.uni_freiburg.informatik.ultimate.boogie.preprocessor: - GenericResult: Unfinished Backtranslation Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 11]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - StatisticsResult: Ultimate Automizer benchmark data for error location: barErr0EnsuresViolation CFG has 5 procedures, 62 locations, 5 error locations. SAFE Result, 0.3s OverallTime, 1 OverallIterations, 1 TraceHistogramMax, 0.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.1s HoareAnnotationTime, HoareTripleCheckerStatistics: 66 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=62occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 12 LocationsWithAnnotation, 17 PreInvPairs, 21 NumberOfFragments, 12 HoareAnnotationTreeSize, 17 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 12 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 20 NumberOfCodeBlocks, 20 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 19 ConstructedInterpolants, 0 QuantifiedInterpolants, 361 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, REUSE_STATISTICS: No data available - CounterExampleResult [Line: 1]: not all allocated memory was freed not all allocated memory was freed We found a FailurePath: - StatisticsResult: Ultimate Automizer benchmark data for error location: ULTIMATE.initErr0EnsuresViolation CFG has 5 procedures, 62 locations, 5 error locations. UNSAFE Result, 0.0s OverallTime, 1 OverallIterations, 1 TraceHistogramMax, 0.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=62occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 3 NumberOfCodeBlocks, 3 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, REUSE_STATISTICS: No data available - PositiveResult [Line: 20]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - StatisticsResult: Ultimate Automizer benchmark data for error location: fooErr0EnsuresViolation CFG has 5 procedures, 62 locations, 5 error locations. SAFE Result, 0.7s OverallTime, 3 OverallIterations, 2 TraceHistogramMax, 0.3s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 138 SDtfs, 60 SDslu, 196 SDs, 0 SdLazy, 114 SolverSat, 9 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=69occurred in iteration=2, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 8 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 87 NumberOfCodeBlocks, 87 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 84 ConstructedInterpolants, 0 QuantifiedInterpolants, 5846 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 3 PerfectInterpolantSequences, 2/2 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, REUSE_STATISTICS: No data available - TimeoutResultAtElement [Line: 1]: Timeout (TraceAbstraction) Unable to prove that all allocated memory was freed (line 1). Cancelled while BasicCegarLoop was analyzing trace of length 547 with TraceHistMax 39, while TraceCheckSpWp was constructing backward predicates, while PredicateComparison was comparing new predicate (quantifier-free) to 24 known predicates. - StatisticsResult: Ultimate Automizer benchmark data for error location: ULTIMATE.startErr0EnsuresViolation CFG has 5 procedures, 62 locations, 5 error locations. TIMEOUT Result, 59.8s OverallTime, 13 OverallIterations, 39 TraceHistogramMax, 2.6s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 621 SDtfs, 1329 SDslu, 3640 SDs, 0 SdLazy, 2370 SolverSat, 277 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 7782 GetRequests, 7473 SyntacticMatches, 72 SemanticMatches, 237 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2060 ImplicationChecksByTransitivity, 3.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=265occurred in iteration=12, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.9s AbstIntTime, 3 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 12 MinimizatonAttempts, 535 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.3s SsaConstructionTime, 45.3s SatisfiabilityAnalysisTime, 8.0s InterpolantComputationTime, 5834 NumberOfCodeBlocks, 5404 NumberOfCodeBlocksAsserted, 63 NumberOfCheckSat, 9609 ConstructedInterpolants, 0 QuantifiedInterpolants, 4422723 SizeOfPredicates, 65 NumberOfNonLiveVariables, 8039 ConjunctsInSsa, 165 ConjunctsInUnsatCore, 48 InterpolantComputations, 6 PerfectInterpolantSequences, 43199/46502 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, REUSE_STATISTICS: No data available - TimeoutResultAtElement [Line: 31]: Timeout (TraceAbstraction) Unable to prove that all allocated memory was freed (line 31). Cancelled while IsEmpty was searching accepting run (input had 62 states). - StatisticsResult: Ultimate Automizer benchmark data for error location: mainErr0EnsuresViolation CFG has 5 procedures, 62 locations, 5 error locations. TIMEOUT Result, 0.0s OverallTime, 0 OverallIterations, 0 TraceHistogramMax, 0.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=62occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: No data available, REUSE_STATISTICS: No data available RESULT: Ultimate proved your program to be incorrect! Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/ArraysOfVariableLength2_false-valid-deref-read.c_mempurity-32bit-Automizer_Taipan+AI_EQ_imprecise.epf_AutomizerC.xml/Csv-Benchmark-0-2018-01-21_00-43-53-634.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/ArraysOfVariableLength2_false-valid-deref-read.c_mempurity-32bit-Automizer_Taipan+AI_EQ_imprecise.epf_AutomizerC.xml/Csv-VPDomainBenchmark-0-2018-01-21_00-43-53-634.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/ArraysOfVariableLength2_false-valid-deref-read.c_mempurity-32bit-Automizer_Taipan+AI_EQ_imprecise.epf_AutomizerC.xml/Csv-BenchmarkWithCounters-0-2018-01-21_00-43-53-634.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/ArraysOfVariableLength2_false-valid-deref-read.c_mempurity-32bit-Automizer_Taipan+AI_EQ_imprecise.epf_AutomizerC.xml/Csv-VPDomainBenchmark-1-2018-01-21_00-43-53-634.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/ArraysOfVariableLength2_false-valid-deref-read.c_mempurity-32bit-Automizer_Taipan+AI_EQ_imprecise.epf_AutomizerC.xml/Csv-BenchmarkWithCounters-1-2018-01-21_00-43-53-634.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/ArraysOfVariableLength2_false-valid-deref-read.c_mempurity-32bit-Automizer_Taipan+AI_EQ_imprecise.epf_AutomizerC.xml/Csv-VPDomainBenchmark-2-2018-01-21_00-43-53-634.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/ArraysOfVariableLength2_false-valid-deref-read.c_mempurity-32bit-Automizer_Taipan+AI_EQ_imprecise.epf_AutomizerC.xml/Csv-BenchmarkWithCounters-2-2018-01-21_00-43-53-634.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/ArraysOfVariableLength2_false-valid-deref-read.c_mempurity-32bit-Automizer_Taipan+AI_EQ_imprecise.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-0-2018-01-21_00-43-53-634.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/ArraysOfVariableLength2_false-valid-deref-read.c_mempurity-32bit-Automizer_Taipan+AI_EQ_imprecise.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-1-2018-01-21_00-43-53-634.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/ArraysOfVariableLength2_false-valid-deref-read.c_mempurity-32bit-Automizer_Taipan+AI_EQ_imprecise.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-2-2018-01-21_00-43-53-634.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/ArraysOfVariableLength2_false-valid-deref-read.c_mempurity-32bit-Automizer_Taipan+AI_EQ_imprecise.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-3-2018-01-21_00-43-53-634.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/ArraysOfVariableLength2_false-valid-deref-read.c_mempurity-32bit-Automizer_Taipan+AI_EQ_imprecise.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-4-2018-01-21_00-43-53-634.csv Completed graceful shutdown