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/memsafety-ext2/complex_data_creation_test01_true-valid-memsafety.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-2f49842 [2018-01-21 00:40:50,659 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-21 00:40:50,661 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-21 00:40:50,675 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-21 00:40:50,675 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-21 00:40:50,676 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-21 00:40:50,677 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-21 00:40:50,678 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-21 00:40:50,681 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-21 00:40:50,681 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-21 00:40:50,682 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2018-01-21 00:40:50,703 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 00:40:50,712 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-21 00:40:50,713 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-21 00:40:50,713 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-21 00:40:50,714 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-21 00:40:50,714 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-21 00:40:50,714 INFO L133 SettingsManager]: * Deactivate Weak Equivalences=true [2018-01-21 00:40:50,714 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-21 00:40:50,714 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-21 00:40:50,715 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-21 00:40:50,715 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-21 00:40:50,715 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-21 00:40:50,716 INFO L133 SettingsManager]: * Check allocation purity=true [2018-01-21 00:40:50,716 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-21 00:40:50,716 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-21 00:40:50,716 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-21 00:40:50,716 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-01-21 00:40:50,717 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-21 00:40:50,717 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-01-21 00:40:50,717 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-21 00:40:50,717 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-01-21 00:40:50,717 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-01-21 00:40:50,718 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-21 00:40:50,718 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-01-21 00:40:50,718 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-21 00:40:50,718 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-21 00:40:50,718 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-21 00:40:50,719 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-21 00:40:50,719 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-21 00:40:50,719 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-21 00:40:50,719 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-21 00:40:50,719 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-21 00:40:50,720 INFO L133 SettingsManager]: * Stop after first violation was found=false [2018-01-21 00:40:50,720 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-01-21 00:40:50,720 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-21 00:40:50,720 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-21 00:40:50,720 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-21 00:40:50,721 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-01-21 00:40:50,721 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-21 00:40:50,722 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-21 00:40:50,755 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-21 00:40:50,768 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-21 00:40:50,773 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-21 00:40:50,775 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-21 00:40:50,775 INFO L276 PluginConnector]: CDTParser initialized [2018-01-21 00:40:50,776 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/memsafety-ext2/complex_data_creation_test01_true-valid-memsafety.i [2018-01-21 00:40:50,939 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-21 00:40:50,944 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-21 00:40:50,945 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-21 00:40:50,945 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-21 00:40:50,950 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-21 00:40:50,951 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.01 12:40:50" (1/1) ... [2018-01-21 00:40:50,953 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2eeba7ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 12:40:50, skipping insertion in model container [2018-01-21 00:40:50,953 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.01 12:40:50" (1/1) ... [2018-01-21 00:40:50,966 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-21 00:40:51,002 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-21 00:40:51,115 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-21 00:40:51,139 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-21 00:40:51,150 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 12:40:51 WrapperNode [2018-01-21 00:40:51,150 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-21 00:40:51,151 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-21 00:40:51,151 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-21 00:40:51,151 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-21 00:40:51,165 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 12:40:51" (1/1) ... [2018-01-21 00:40:51,166 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 12:40:51" (1/1) ... [2018-01-21 00:40:51,175 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 12:40:51" (1/1) ... [2018-01-21 00:40:51,175 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 12:40:51" (1/1) ... [2018-01-21 00:40:51,181 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 12:40:51" (1/1) ... [2018-01-21 00:40:51,185 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 12:40:51" (1/1) ... [2018-01-21 00:40:51,186 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 12:40:51" (1/1) ... [2018-01-21 00:40:51,188 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-21 00:40:51,189 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-21 00:40:51,189 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-21 00:40:51,189 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-21 00:40:51,190 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 12:40:51" (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 00:40:51,236 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-21 00:40:51,236 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-21 00:40:51,236 INFO L136 BoogieDeclarations]: Found implementation of procedure create_data [2018-01-21 00:40:51,236 INFO L136 BoogieDeclarations]: Found implementation of procedure freeData [2018-01-21 00:40:51,236 INFO L136 BoogieDeclarations]: Found implementation of procedure append [2018-01-21 00:40:51,236 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-21 00:40:51,236 INFO L128 BoogieDeclarations]: Found specification of procedure write~int [2018-01-21 00:40:51,237 INFO L128 BoogieDeclarations]: Found specification of procedure read~int [2018-01-21 00:40:51,237 INFO L128 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2018-01-21 00:40:51,237 INFO L128 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2018-01-21 00:40:51,237 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-01-21 00:40:51,237 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-01-21 00:40:51,237 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-01-21 00:40:51,237 INFO L128 BoogieDeclarations]: Found specification of procedure malloc [2018-01-21 00:40:51,237 INFO L128 BoogieDeclarations]: Found specification of procedure free [2018-01-21 00:40:51,237 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-01-21 00:40:51,237 INFO L128 BoogieDeclarations]: Found specification of procedure create_data [2018-01-21 00:40:51,237 INFO L128 BoogieDeclarations]: Found specification of procedure freeData [2018-01-21 00:40:51,238 INFO L128 BoogieDeclarations]: Found specification of procedure append [2018-01-21 00:40:51,238 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-21 00:40:51,238 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-21 00:40:51,238 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-21 00:40:51,681 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-21 00:40:51,682 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.01 12:40:51 BoogieIcfgContainer [2018-01-21 00:40:51,682 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-21 00:40:51,683 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-01-21 00:40:51,684 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-01-21 00:40:51,686 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-01-21 00:40:51,686 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.01 12:40:50" (1/3) ... [2018-01-21 00:40:51,688 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@eb6bf47 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.01 12:40:51, skipping insertion in model container [2018-01-21 00:40:51,688 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 12:40:51" (2/3) ... [2018-01-21 00:40:51,688 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@eb6bf47 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.01 12:40:51, skipping insertion in model container [2018-01-21 00:40:51,688 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.01 12:40:51" (3/3) ... [2018-01-21 00:40:51,690 INFO L105 eAbstractionObserver]: Analyzing ICFG complex_data_creation_test01_true-valid-memsafety.i [2018-01-21 00:40:51,700 INFO L130 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-01-21 00:40:51,709 INFO L142 ceAbstractionStarter]: Appying trace abstraction to program that has 6 error locations. [2018-01-21 00:40:51,750 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 00:40:51,751 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 00:40:51,751 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 00:40:51,751 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 00:40:51,751 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 00:40:51,751 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 00:40:51,752 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 00:40:51,752 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == create_dataErr0EnsuresViolation======== [2018-01-21 00:40:51,753 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 00:40:51,776 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states. [2018-01-21 00:40:51,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-01-21 00:40:51,785 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 00:40:51,786 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] [2018-01-21 00:40:51,786 INFO L371 AbstractCegarLoop]: === Iteration 1 === [create_dataErr0EnsuresViolation]=== [2018-01-21 00:40:51,791 INFO L82 PathProgramCache]: Analyzing trace with hash 1561242995, now seen corresponding path program 1 times [2018-01-21 00:40:51,794 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 00:40:51,835 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:40:51,836 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 00:40:51,836 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:40:51,836 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 00:40:51,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 00:40:51,910 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 00:40:52,007 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 00:40:52,010 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 00:40:52,010 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-21 00:40:52,010 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 00:40:52,013 INFO L409 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-01-21 00:40:52,096 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-01-21 00:40:52,096 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-01-21 00:40:52,099 INFO L87 Difference]: Start difference. First operand 128 states. Second operand 3 states. [2018-01-21 00:40:52,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 00:40:52,146 INFO L93 Difference]: Finished difference Result 248 states and 284 transitions. [2018-01-21 00:40:52,147 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-01-21 00:40:52,148 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2018-01-21 00:40:52,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 00:40:52,156 INFO L225 Difference]: With dead ends: 248 [2018-01-21 00:40:52,156 INFO L226 Difference]: Without dead ends: 96 [2018-01-21 00:40:52,160 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 00:40:52,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2018-01-21 00:40:52,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2018-01-21 00:40:52,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2018-01-21 00:40:52,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 107 transitions. [2018-01-21 00:40:52,195 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 107 transitions. Word has length 25 [2018-01-21 00:40:52,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 00:40:52,195 INFO L432 AbstractCegarLoop]: Abstraction has 96 states and 107 transitions. [2018-01-21 00:40:52,195 INFO L433 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-01-21 00:40:52,195 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 107 transitions. [2018-01-21 00:40:52,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-01-21 00:40:52,198 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 00:40:52,198 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] [2018-01-21 00:40:52,198 INFO L371 AbstractCegarLoop]: === Iteration 2 === [create_dataErr0EnsuresViolation]=== [2018-01-21 00:40:52,198 INFO L82 PathProgramCache]: Analyzing trace with hash 1948874992, now seen corresponding path program 1 times [2018-01-21 00:40:52,199 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 00:40:52,200 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:40:52,200 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 00:40:52,200 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:40:52,200 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 00:40:52,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 00:40:52,222 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 00:40:52,299 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 00:40:52,299 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 00:40:52,299 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-01-21 00:40:52,299 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 00:40:52,301 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-21 00:40:52,301 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-21 00:40:52,301 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-21 00:40:52,302 INFO L87 Difference]: Start difference. First operand 96 states and 107 transitions. Second operand 4 states. [2018-01-21 00:40:52,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 00:40:52,357 INFO L93 Difference]: Finished difference Result 234 states and 263 transitions. [2018-01-21 00:40:52,357 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-21 00:40:52,357 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2018-01-21 00:40:52,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 00:40:52,359 INFO L225 Difference]: With dead ends: 234 [2018-01-21 00:40:52,359 INFO L226 Difference]: Without dead ends: 146 [2018-01-21 00:40:52,360 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 00:40:52,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2018-01-21 00:40:52,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 145. [2018-01-21 00:40:52,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2018-01-21 00:40:52,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 161 transitions. [2018-01-21 00:40:52,370 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 161 transitions. Word has length 27 [2018-01-21 00:40:52,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 00:40:52,370 INFO L432 AbstractCegarLoop]: Abstraction has 145 states and 161 transitions. [2018-01-21 00:40:52,370 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-21 00:40:52,370 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 161 transitions. [2018-01-21 00:40:52,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-01-21 00:40:52,371 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 00:40:52,371 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, 1] [2018-01-21 00:40:52,371 INFO L371 AbstractCegarLoop]: === Iteration 3 === [create_dataErr0EnsuresViolation]=== [2018-01-21 00:40:52,372 INFO L82 PathProgramCache]: Analyzing trace with hash -245124692, now seen corresponding path program 1 times [2018-01-21 00:40:52,372 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 00:40:52,373 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:40:52,373 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 00:40:52,373 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:40:52,373 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 00:40:52,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 00:40:52,395 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 00:40:52,428 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 00:40:52,428 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 00:40:52,428 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-21 00:40:52,429 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 00:40:52,429 INFO L409 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-01-21 00:40:52,429 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-01-21 00:40:52,429 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-01-21 00:40:52,430 INFO L87 Difference]: Start difference. First operand 145 states and 161 transitions. Second operand 3 states. [2018-01-21 00:40:52,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 00:40:52,472 INFO L93 Difference]: Finished difference Result 147 states and 163 transitions. [2018-01-21 00:40:52,473 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-01-21 00:40:52,473 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2018-01-21 00:40:52,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 00:40:52,475 INFO L225 Difference]: With dead ends: 147 [2018-01-21 00:40:52,475 INFO L226 Difference]: Without dead ends: 146 [2018-01-21 00:40:52,475 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 00:40:52,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2018-01-21 00:40:52,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 146. [2018-01-21 00:40:52,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2018-01-21 00:40:52,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 162 transitions. [2018-01-21 00:40:52,488 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 162 transitions. Word has length 29 [2018-01-21 00:40:52,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 00:40:52,488 INFO L432 AbstractCegarLoop]: Abstraction has 146 states and 162 transitions. [2018-01-21 00:40:52,488 INFO L433 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-01-21 00:40:52,489 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 162 transitions. [2018-01-21 00:40:52,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-01-21 00:40:52,491 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 00:40:52,491 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 00:40:52,491 INFO L371 AbstractCegarLoop]: === Iteration 4 === [create_dataErr0EnsuresViolation]=== [2018-01-21 00:40:52,491 INFO L82 PathProgramCache]: Analyzing trace with hash 1224197024, now seen corresponding path program 1 times [2018-01-21 00:40:52,491 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 00:40:52,492 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:40:52,493 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 00:40:52,493 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:40:52,493 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 00:40:52,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 00:40:52,518 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 00:40:52,568 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 00:40:52,569 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 00:40:52,569 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-21 00:40:52,569 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 00:40:52,569 INFO L409 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-01-21 00:40:52,569 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-01-21 00:40:52,570 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-01-21 00:40:52,570 INFO L87 Difference]: Start difference. First operand 146 states and 162 transitions. Second operand 3 states. [2018-01-21 00:40:52,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 00:40:52,611 INFO L93 Difference]: Finished difference Result 298 states and 335 transitions. [2018-01-21 00:40:52,611 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-01-21 00:40:52,611 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 43 [2018-01-21 00:40:52,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 00:40:52,613 INFO L225 Difference]: With dead ends: 298 [2018-01-21 00:40:52,613 INFO L226 Difference]: Without dead ends: 160 [2018-01-21 00:40:52,614 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 00:40:52,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2018-01-21 00:40:52,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 150. [2018-01-21 00:40:52,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2018-01-21 00:40:52,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 166 transitions. [2018-01-21 00:40:52,627 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 166 transitions. Word has length 43 [2018-01-21 00:40:52,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 00:40:52,627 INFO L432 AbstractCegarLoop]: Abstraction has 150 states and 166 transitions. [2018-01-21 00:40:52,627 INFO L433 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-01-21 00:40:52,628 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 166 transitions. [2018-01-21 00:40:52,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-01-21 00:40:52,630 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 00:40:52,630 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, 1, 1, 1, 1] [2018-01-21 00:40:52,630 INFO L371 AbstractCegarLoop]: === Iteration 5 === [create_dataErr0EnsuresViolation]=== [2018-01-21 00:40:52,630 INFO L82 PathProgramCache]: Analyzing trace with hash 1546322841, now seen corresponding path program 1 times [2018-01-21 00:40:52,630 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 00:40:52,631 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:40:52,631 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 00:40:52,632 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:40:52,632 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 00:40:52,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 00:40:52,656 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 00:40:52,699 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 00:40:52,699 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 00:40:52,699 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-21 00:40:52,700 INFO L199 CegarAbsIntRunner]: Running AI on error trace of length 51 with the following transitions: [2018-01-21 00:40:52,702 INFO L201 CegarAbsIntRunner]: [0], [7], [14], [15], [16], [17], [18], [19], [23], [26], [28], [29], [30], [31], [32], [34], [38], [39], [43], [45], [52], [54], [61], [65], [75], [91], [92], [93], [95], [97], [98], [99], [100], [104], [172], [173], [179], [180], [181], [182], [183], [184], [185], [188], [203], [207], [208], [209], [211] [2018-01-21 00:40:52,746 INFO L147 AbstractInterpreter]: Using domain VPDomain [2018-01-21 00:40:52,746 INFO L101 FixpointEngine]: Starting fixpoint engine with domain VPDomain (maxUnwinding=3, maxParallelStates=2) [2018-01-21 00:40:53,082 INFO L259 AbstractInterpreter]: Some error location(s) were reachable [2018-01-21 00:40:53,083 INFO L268 AbstractInterpreter]: Visited 49 different actions 71 times. Merged at 22 different actions 22 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 41 variables. [2018-01-21 00:40:53,095 INFO L434 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-01-21 00:40:53,095 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 00:40:53,096 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 00:40:53,110 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 00:40:53,111 INFO L280 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-01-21 00:40:53,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 00:40:53,167 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-21 00:40:53,241 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 00:40:53,242 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-21 00:40:53,290 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 00:40:53,311 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 00:40:53,311 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 3 with cvc4 --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with cvc4 --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-01-21 00:40:53,315 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 00:40:53,315 INFO L280 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-01-21 00:40:53,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 00:40:53,373 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-21 00:40:53,380 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 00:40:53,380 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-21 00:40:53,407 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 00:40:53,409 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-01-21 00:40:53,409 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4] total 7 [2018-01-21 00:40:53,409 INFO L247 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-01-21 00:40:53,409 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-21 00:40:53,409 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-21 00:40:53,410 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-01-21 00:40:53,410 INFO L87 Difference]: Start difference. First operand 150 states and 166 transitions. Second operand 5 states. [2018-01-21 00:40:53,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 00:40:53,436 INFO L93 Difference]: Finished difference Result 316 states and 353 transitions. [2018-01-21 00:40:53,436 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-01-21 00:40:53,437 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 50 [2018-01-21 00:40:53,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 00:40:53,439 INFO L225 Difference]: With dead ends: 316 [2018-01-21 00:40:53,439 INFO L226 Difference]: Without dead ends: 174 [2018-01-21 00:40:53,440 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 197 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 00:40:53,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2018-01-21 00:40:53,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 164. [2018-01-21 00:40:53,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2018-01-21 00:40:53,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 180 transitions. [2018-01-21 00:40:53,452 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 180 transitions. Word has length 50 [2018-01-21 00:40:53,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 00:40:53,453 INFO L432 AbstractCegarLoop]: Abstraction has 164 states and 180 transitions. [2018-01-21 00:40:53,453 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-21 00:40:53,453 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 180 transitions. [2018-01-21 00:40:53,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-01-21 00:40:53,455 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 00:40:53,456 INFO L322 BasicCegarLoop]: trace histogram [3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 00:40:53,456 INFO L371 AbstractCegarLoop]: === Iteration 6 === [create_dataErr0EnsuresViolation]=== [2018-01-21 00:40:53,456 INFO L82 PathProgramCache]: Analyzing trace with hash 1302825344, now seen corresponding path program 2 times [2018-01-21 00:40:53,456 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 00:40:53,457 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:40:53,458 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 00:40:53,458 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:40:53,458 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 00:40:53,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 00:40:53,485 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 00:40:53,586 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-21 00:40:53,586 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 00:40:53,586 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-21 00:40:53,587 INFO L183 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-01-21 00:40:53,587 INFO L434 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-01-21 00:40:53,587 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 00:40:53,587 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-21 00:40:53,599 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-21 00:40:53,599 INFO L280 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-01-21 00:40:53,630 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-21 00:40:53,659 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-21 00:40:53,661 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-21 00:40:53,665 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-21 00:40:53,679 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-21 00:40:53,679 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-21 00:40:53,713 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-21 00:40:53,747 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 00:40:53,747 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 5 with cvc4 --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with cvc4 --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-01-21 00:40:53,756 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-21 00:40:53,756 INFO L280 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-01-21 00:40:53,793 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-21 00:40:54,023 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-21 00:40:54,050 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-21 00:40:54,058 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-21 00:40:54,067 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-21 00:40:54,067 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-21 00:40:54,083 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-21 00:40:54,087 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-01-21 00:40:54,087 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5] total 9 [2018-01-21 00:40:54,087 INFO L247 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-01-21 00:40:54,087 INFO L409 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-01-21 00:40:54,088 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-01-21 00:40:54,088 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-01-21 00:40:54,088 INFO L87 Difference]: Start difference. First operand 164 states and 180 transitions. Second operand 6 states. [2018-01-21 00:40:54,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 00:40:54,145 INFO L93 Difference]: Finished difference Result 344 states and 381 transitions. [2018-01-21 00:40:54,146 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-21 00:40:54,146 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 57 [2018-01-21 00:40:54,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 00:40:54,147 INFO L225 Difference]: With dead ends: 344 [2018-01-21 00:40:54,147 INFO L226 Difference]: Without dead ends: 188 [2018-01-21 00:40:54,148 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 224 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-01-21 00:40:54,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2018-01-21 00:40:54,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 178. [2018-01-21 00:40:54,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2018-01-21 00:40:54,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 194 transitions. [2018-01-21 00:40:54,161 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 194 transitions. Word has length 57 [2018-01-21 00:40:54,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 00:40:54,161 INFO L432 AbstractCegarLoop]: Abstraction has 178 states and 194 transitions. [2018-01-21 00:40:54,161 INFO L433 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-01-21 00:40:54,161 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 194 transitions. [2018-01-21 00:40:54,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-01-21 00:40:54,163 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 00:40:54,163 INFO L322 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:40:54,164 INFO L371 AbstractCegarLoop]: === Iteration 7 === [create_dataErr0EnsuresViolation]=== [2018-01-21 00:40:54,164 INFO L82 PathProgramCache]: Analyzing trace with hash -1322589767, now seen corresponding path program 3 times [2018-01-21 00:40:54,164 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 00:40:54,165 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:40:54,165 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-21 00:40:54,165 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:40:54,165 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 00:40:54,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 00:40:54,190 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 00:40:54,285 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-21 00:40:54,285 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 00:40:54,285 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-21 00:40:54,285 INFO L183 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-01-21 00:40:54,285 INFO L434 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-01-21 00:40:54,285 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 00:40:54,286 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 00:40:54,295 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-21 00:40:54,295 INFO L280 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-01-21 00:40:54,329 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-21 00:40:54,358 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-21 00:40:54,425 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-21 00:40:54,477 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-21 00:40:54,485 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-21 00:40:54,490 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-21 00:40:54,518 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-21 00:40:54,519 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-21 00:40:54,567 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-21 00:40:54,589 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 00:40:54,590 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 00:40:54,593 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-21 00:40:54,593 INFO L280 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-01-21 00:40:54,632 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-21 00:40:54,874 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-21 00:40:55,752 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-21 00:41:01,964 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-21 00:41:02,033 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-21 00:41:02,040 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-21 00:41:02,048 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-21 00:41:02,048 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-21 00:41:02,081 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-21 00:41:02,084 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-01-21 00:41:02,084 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6] total 11 [2018-01-21 00:41:02,084 INFO L247 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-01-21 00:41:02,085 INFO L409 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-01-21 00:41:02,085 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-01-21 00:41:02,085 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-01-21 00:41:02,085 INFO L87 Difference]: Start difference. First operand 178 states and 194 transitions. Second operand 7 states. [2018-01-21 00:41:02,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 00:41:02,158 INFO L93 Difference]: Finished difference Result 372 states and 409 transitions. [2018-01-21 00:41:02,158 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-01-21 00:41:02,158 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 64 [2018-01-21 00:41:02,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 00:41:02,160 INFO L225 Difference]: With dead ends: 372 [2018-01-21 00:41:02,160 INFO L226 Difference]: Without dead ends: 202 [2018-01-21 00:41:02,161 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 251 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-01-21 00:41:02,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2018-01-21 00:41:02,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 192. [2018-01-21 00:41:02,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2018-01-21 00:41:02,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 208 transitions. [2018-01-21 00:41:02,171 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 208 transitions. Word has length 64 [2018-01-21 00:41:02,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 00:41:02,171 INFO L432 AbstractCegarLoop]: Abstraction has 192 states and 208 transitions. [2018-01-21 00:41:02,172 INFO L433 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-01-21 00:41:02,172 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 208 transitions. [2018-01-21 00:41:02,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2018-01-21 00:41:02,173 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 00:41:02,173 INFO L322 BasicCegarLoop]: trace histogram [5, 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, 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 00:41:02,174 INFO L371 AbstractCegarLoop]: === Iteration 8 === [create_dataErr0EnsuresViolation]=== [2018-01-21 00:41:02,174 INFO L82 PathProgramCache]: Analyzing trace with hash 1826064224, now seen corresponding path program 4 times [2018-01-21 00:41:02,174 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 00:41:02,175 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:41:02,175 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-21 00:41:02,175 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:41:02,175 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 00:41:02,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 00:41:02,195 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 00:41:02,295 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-21 00:41:02,295 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 00:41:02,296 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-21 00:41:02,296 INFO L183 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-01-21 00:41:02,296 INFO L434 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-01-21 00:41:02,296 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 00:41:02,296 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 00:41:02,306 INFO L101 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-01-21 00:41:02,307 INFO L280 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-01-21 00:41:02,502 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-21 00:41:02,506 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-21 00:41:02,526 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-21 00:41:02,526 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-21 00:41:02,581 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-21 00:41:02,607 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 00:41:02,607 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 00:41:02,610 INFO L101 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-01-21 00:41:02,610 INFO L280 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-01-21 00:41:06,561 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-21 00:41:06,567 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-21 00:41:06,577 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-21 00:41:06,577 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-21 00:41:06,593 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-21 00:41:06,596 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-01-21 00:41:06,596 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7] total 13 [2018-01-21 00:41:06,596 INFO L247 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-01-21 00:41:06,597 INFO L409 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-01-21 00:41:06,597 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-01-21 00:41:06,597 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-01-21 00:41:06,597 INFO L87 Difference]: Start difference. First operand 192 states and 208 transitions. Second operand 8 states. [2018-01-21 00:41:06,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 00:41:06,638 INFO L93 Difference]: Finished difference Result 400 states and 437 transitions. [2018-01-21 00:41:06,638 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-01-21 00:41:06,638 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 71 [2018-01-21 00:41:06,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 00:41:06,640 INFO L225 Difference]: With dead ends: 400 [2018-01-21 00:41:06,640 INFO L226 Difference]: Without dead ends: 216 [2018-01-21 00:41:06,641 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 278 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-01-21 00:41:06,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2018-01-21 00:41:06,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 206. [2018-01-21 00:41:06,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2018-01-21 00:41:06,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 222 transitions. [2018-01-21 00:41:06,651 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 222 transitions. Word has length 71 [2018-01-21 00:41:06,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 00:41:06,651 INFO L432 AbstractCegarLoop]: Abstraction has 206 states and 222 transitions. [2018-01-21 00:41:06,651 INFO L433 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-01-21 00:41:06,652 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 222 transitions. [2018-01-21 00:41:06,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-01-21 00:41:06,653 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 00:41:06,653 INFO L322 BasicCegarLoop]: trace histogram [6, 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, 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 00:41:06,653 INFO L371 AbstractCegarLoop]: === Iteration 9 === [create_dataErr0EnsuresViolation]=== [2018-01-21 00:41:06,653 INFO L82 PathProgramCache]: Analyzing trace with hash 1568376793, now seen corresponding path program 5 times [2018-01-21 00:41:06,653 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 00:41:06,654 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:41:06,654 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-21 00:41:06,654 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:41:06,655 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 00:41:06,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 00:41:06,679 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 00:41:06,772 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-21 00:41:06,772 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 00:41:06,772 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-21 00:41:06,772 INFO L183 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-01-21 00:41:06,773 INFO L434 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-01-21 00:41:06,773 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 00:41:06,773 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 00:41:06,788 INFO L101 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-01-21 00:41:06,788 INFO L280 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder INSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-01-21 00:41:06,799 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-21 00:41:06,801 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-21 00:41:06,804 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-21 00:41:06,810 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-21 00:41:06,817 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-21 00:41:06,840 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-21 00:41:06,853 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-21 00:41:06,856 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-21 00:41:06,890 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-21 00:41:06,891 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-21 00:41:06,969 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-21 00:41:07,003 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 00:41:07,003 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 00:41:07,009 INFO L101 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-01-21 00:41:07,009 INFO L280 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder INSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-01-21 00:41:07,029 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-21 00:41:07,037 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-21 00:41:07,052 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-21 00:41:07,089 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-21 00:41:07,137 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-21 00:41:07,245 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-21 00:41:07,267 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-21 00:41:07,273 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-21 00:41:07,280 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-21 00:41:07,280 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-21 00:41:07,292 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-21 00:41:07,293 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-01-21 00:41:07,293 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8] total 15 [2018-01-21 00:41:07,294 INFO L247 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-01-21 00:41:07,294 INFO L409 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-01-21 00:41:07,294 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-01-21 00:41:07,294 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-01-21 00:41:07,295 INFO L87 Difference]: Start difference. First operand 206 states and 222 transitions. Second operand 9 states. [2018-01-21 00:41:07,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 00:41:07,326 INFO L93 Difference]: Finished difference Result 428 states and 465 transitions. [2018-01-21 00:41:07,326 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-01-21 00:41:07,326 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 78 [2018-01-21 00:41:07,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 00:41:07,328 INFO L225 Difference]: With dead ends: 428 [2018-01-21 00:41:07,328 INFO L226 Difference]: Without dead ends: 230 [2018-01-21 00:41:07,328 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 305 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-01-21 00:41:07,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2018-01-21 00:41:07,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 220. [2018-01-21 00:41:07,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 220 states. [2018-01-21 00:41:07,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 236 transitions. [2018-01-21 00:41:07,335 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 236 transitions. Word has length 78 [2018-01-21 00:41:07,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 00:41:07,335 INFO L432 AbstractCegarLoop]: Abstraction has 220 states and 236 transitions. [2018-01-21 00:41:07,335 INFO L433 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-01-21 00:41:07,335 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 236 transitions. [2018-01-21 00:41:07,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2018-01-21 00:41:07,336 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 00:41:07,336 INFO L322 BasicCegarLoop]: trace histogram [7, 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, 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 00:41:07,336 INFO L371 AbstractCegarLoop]: === Iteration 10 === [create_dataErr0EnsuresViolation]=== [2018-01-21 00:41:07,336 INFO L82 PathProgramCache]: Analyzing trace with hash 1170586944, now seen corresponding path program 6 times [2018-01-21 00:41:07,336 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 00:41:07,337 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:41:07,337 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-21 00:41:07,337 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:41:07,337 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 00:41:07,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 00:41:07,357 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 00:41:07,589 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-21 00:41:07,590 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 00:41:07,590 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-21 00:41:07,590 INFO L183 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-01-21 00:41:07,590 INFO L434 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-01-21 00:41:07,590 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 00:41:07,590 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 00:41:07,605 INFO L101 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-01-21 00:41:07,605 INFO L280 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder MIX_INSIDE_OUTSIDE (IT: FPandBP) [2018-01-21 00:41:07,635 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-21 00:41:07,668 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-21 00:41:07,763 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-21 00:41:07,829 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-21 00:41:08,014 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-21 00:41:08,374 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-21 00:41:08,984 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-21 00:41:08,985 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-21 00:41:08,988 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-21 00:41:09,001 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-21 00:41:09,001 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-21 00:41:09,079 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-21 00:41:09,101 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 00:41:09,101 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 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 00:41:09,104 INFO L101 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-01-21 00:41:09,104 INFO L280 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder MIX_INSIDE_OUTSIDE (IT: FPandBP) [2018-01-21 00:41:09,131 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-21 00:41:09,250 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-21 00:41:09,495 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-21 00:41:10,893 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-21 00:41:19,486 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-21 00:41:19,920 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-21 00:41:20,471 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-21 00:41:20,503 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-21 00:41:20,509 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-21 00:41:20,524 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-21 00:41:20,525 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-21 00:41:20,539 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-21 00:41:20,542 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-01-21 00:41:20,542 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9] total 17 [2018-01-21 00:41:20,542 INFO L247 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-01-21 00:41:20,543 INFO L409 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-01-21 00:41:20,543 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-01-21 00:41:20,543 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-01-21 00:41:20,543 INFO L87 Difference]: Start difference. First operand 220 states and 236 transitions. Second operand 10 states. [2018-01-21 00:41:20,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 00:41:20,577 INFO L93 Difference]: Finished difference Result 456 states and 493 transitions. [2018-01-21 00:41:20,577 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-01-21 00:41:20,577 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 85 [2018-01-21 00:41:20,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 00:41:20,579 INFO L225 Difference]: With dead ends: 456 [2018-01-21 00:41:20,579 INFO L226 Difference]: Without dead ends: 244 [2018-01-21 00:41:20,579 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 347 GetRequests, 332 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-01-21 00:41:20,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2018-01-21 00:41:20,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 234. [2018-01-21 00:41:20,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 234 states. [2018-01-21 00:41:20,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 250 transitions. [2018-01-21 00:41:20,585 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 250 transitions. Word has length 85 [2018-01-21 00:41:20,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 00:41:20,586 INFO L432 AbstractCegarLoop]: Abstraction has 234 states and 250 transitions. [2018-01-21 00:41:20,586 INFO L433 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-01-21 00:41:20,586 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 250 transitions. [2018-01-21 00:41:20,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-01-21 00:41:20,587 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 00:41:20,587 INFO L322 BasicCegarLoop]: trace histogram [8, 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, 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 00:41:20,587 INFO L371 AbstractCegarLoop]: === Iteration 11 === [create_dataErr0EnsuresViolation]=== [2018-01-21 00:41:20,587 INFO L82 PathProgramCache]: Analyzing trace with hash -1071712775, now seen corresponding path program 7 times [2018-01-21 00:41:20,587 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 00:41:20,588 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:41:20,588 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-21 00:41:20,588 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:41:20,588 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 00:41:20,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 00:41:20,605 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 00:41:20,750 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 0 proven. 161 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-21 00:41:20,750 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 00:41:20,750 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-21 00:41:20,751 INFO L183 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-01-21 00:41:20,751 INFO L434 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-01-21 00:41:20,751 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 00:41:20,751 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 00:41:20,756 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 00:41:20,756 INFO L280 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-01-21 00:41:20,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 00:41:20,789 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-21 00:41:20,840 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 0 proven. 161 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-21 00:41:20,840 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-21 00:41:20,919 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 0 proven. 161 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-21 00:41:20,939 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 00:41:20,939 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 00:41:20,942 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 00:41:20,942 INFO L280 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-01-21 00:41:21,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 00:41:21,009 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-21 00:41:21,017 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 0 proven. 161 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-21 00:41:21,018 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-21 00:41:21,029 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 0 proven. 161 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-21 00:41:21,030 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-01-21 00:41:21,031 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 10] total 19 [2018-01-21 00:41:21,031 INFO L247 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-01-21 00:41:21,031 INFO L409 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-01-21 00:41:21,031 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-01-21 00:41:21,032 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-01-21 00:41:21,032 INFO L87 Difference]: Start difference. First operand 234 states and 250 transitions. Second operand 11 states. [2018-01-21 00:41:21,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 00:41:21,083 INFO L93 Difference]: Finished difference Result 484 states and 521 transitions. [2018-01-21 00:41:21,083 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-01-21 00:41:21,083 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 92 [2018-01-21 00:41:21,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 00:41:21,085 INFO L225 Difference]: With dead ends: 484 [2018-01-21 00:41:21,085 INFO L226 Difference]: Without dead ends: 258 [2018-01-21 00:41:21,086 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 376 GetRequests, 359 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-01-21 00:41:21,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2018-01-21 00:41:21,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 248. [2018-01-21 00:41:21,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 248 states. [2018-01-21 00:41:21,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 264 transitions. [2018-01-21 00:41:21,096 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 264 transitions. Word has length 92 [2018-01-21 00:41:21,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 00:41:21,097 INFO L432 AbstractCegarLoop]: Abstraction has 248 states and 264 transitions. [2018-01-21 00:41:21,097 INFO L433 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-01-21 00:41:21,097 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 264 transitions. [2018-01-21 00:41:21,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2018-01-21 00:41:21,098 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 00:41:21,098 INFO L322 BasicCegarLoop]: trace histogram [9, 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, 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 00:41:21,098 INFO L371 AbstractCegarLoop]: === Iteration 12 === [create_dataErr0EnsuresViolation]=== [2018-01-21 00:41:21,099 INFO L82 PathProgramCache]: Analyzing trace with hash -214947040, now seen corresponding path program 8 times [2018-01-21 00:41:21,099 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 00:41:21,099 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:41:21,100 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 00:41:21,100 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:41:21,100 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 00:41:21,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 00:41:21,123 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 00:41:21,257 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 0 proven. 212 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-21 00:41:21,257 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 00:41:21,292 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-21 00:41:21,292 INFO L183 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-01-21 00:41:21,292 INFO L434 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-01-21 00:41:21,292 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 00:41:21,292 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 00:41:21,297 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-21 00:41:21,297 INFO L280 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-01-21 00:41:21,316 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-21 00:41:21,342 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-21 00:41:21,344 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-21 00:41:21,346 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-21 00:41:21,361 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 0 proven. 212 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-21 00:41:21,361 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-21 00:41:21,450 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 0 proven. 212 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-21 00:41:21,470 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 00:41:21,471 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 00:41:21,473 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-21 00:41:21,473 INFO L280 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-01-21 00:41:21,503 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-21 00:41:21,721 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-21 00:41:21,754 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-21 00:41:21,761 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-21 00:41:21,771 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 0 proven. 212 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-21 00:41:21,771 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-21 00:41:21,793 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 0 proven. 212 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-21 00:41:21,795 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-01-21 00:41:21,796 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11, 11, 11] total 21 [2018-01-21 00:41:21,796 INFO L247 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-01-21 00:41:21,796 INFO L409 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-01-21 00:41:21,796 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-01-21 00:41:21,796 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-01-21 00:41:21,796 INFO L87 Difference]: Start difference. First operand 248 states and 264 transitions. Second operand 12 states. [2018-01-21 00:41:21,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 00:41:21,839 INFO L93 Difference]: Finished difference Result 512 states and 549 transitions. [2018-01-21 00:41:21,840 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-01-21 00:41:21,840 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 99 [2018-01-21 00:41:21,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 00:41:21,841 INFO L225 Difference]: With dead ends: 512 [2018-01-21 00:41:21,841 INFO L226 Difference]: Without dead ends: 272 [2018-01-21 00:41:21,842 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 405 GetRequests, 386 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-01-21 00:41:21,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2018-01-21 00:41:21,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 262. [2018-01-21 00:41:21,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 262 states. [2018-01-21 00:41:21,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 278 transitions. [2018-01-21 00:41:21,848 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 278 transitions. Word has length 99 [2018-01-21 00:41:21,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 00:41:21,849 INFO L432 AbstractCegarLoop]: Abstraction has 262 states and 278 transitions. [2018-01-21 00:41:21,849 INFO L433 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-01-21 00:41:21,849 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 278 transitions. [2018-01-21 00:41:21,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2018-01-21 00:41:21,850 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 00:41:21,850 INFO L322 BasicCegarLoop]: trace histogram [10, 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, 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 00:41:21,850 INFO L371 AbstractCegarLoop]: === Iteration 13 === [create_dataErr0EnsuresViolation]=== [2018-01-21 00:41:21,850 INFO L82 PathProgramCache]: Analyzing trace with hash -862508007, now seen corresponding path program 9 times [2018-01-21 00:41:21,850 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 00:41:21,851 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:41:21,851 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-21 00:41:21,851 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:41:21,851 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 00:41:21,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 00:41:21,870 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 00:41:22,044 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 0 proven. 270 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-21 00:41:22,044 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 00:41:22,044 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-21 00:41:22,044 INFO L183 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-01-21 00:41:22,044 INFO L434 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-01-21 00:41:22,045 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 00:41:22,045 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 00:41:22,050 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-21 00:41:22,050 INFO L280 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-01-21 00:41:22,081 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-21 00:41:22,097 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-21 00:41:22,147 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-21 00:41:22,202 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-21 00:41:22,478 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-21 00:41:22,511 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-21 00:41:22,773 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-21 00:41:23,558 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-21 00:41:24,477 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-21 00:41:26,821 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-21 00:41:26,823 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-21 00:41:26,864 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-21 00:41:26,879 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 0 proven. 270 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-21 00:41:26,879 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-21 00:41:26,991 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 0 proven. 270 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-21 00:41:27,014 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 00:41:27,014 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 00:41:27,017 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-21 00:41:27,017 INFO L280 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-01-21 00:41:27,047 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-21 00:41:27,276 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-21 00:41:28,086 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-21 00:41:34,204 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-21 00:41:46,260 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-21 00:41:58,352 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown