java -Xmx6000000000 -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data ./data --generate-csv --csv-dir ../../../releaseScripts/default/UAutomizer-linux/csv -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/ai/eq-bench/mempurity-32bit-Automizer_Taipan+AI_EQ.epf -i ../../../trunk/examples/svcomp/memsafety-ext2/complex_data_creation_test01_true-valid-memsafety.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-2f49842 [2018-01-20 23:41:05,920 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-20 23:41:05,922 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-20 23:41:05,936 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-20 23:41:05,937 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-20 23:41:05,938 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-20 23:41:05,939 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-20 23:41:05,940 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-20 23:41:05,942 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-20 23:41:05,943 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-20 23:41:05,944 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2018-01-20 23:41:05,964 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-01-20 23:41:05,965 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-01-20 23:41:05,965 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/eq-bench/mempurity-32bit-Automizer_Taipan+AI_EQ.epf [2018-01-20 23:41:05,973 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-20 23:41:05,974 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-20 23:41:05,974 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-20 23:41:05,975 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-20 23:41:05,975 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-20 23:41:05,975 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-20 23:41:05,975 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-20 23:41:05,975 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-20 23:41:05,976 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-20 23:41:05,976 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-20 23:41:05,976 INFO L133 SettingsManager]: * Check allocation purity=true [2018-01-20 23:41:05,976 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-20 23:41:05,976 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-20 23:41:05,976 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-20 23:41:05,976 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-01-20 23:41:05,977 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-20 23:41:05,977 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-01-20 23:41:05,977 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-20 23:41:05,977 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-01-20 23:41:05,977 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-01-20 23:41:05,977 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-20 23:41:05,977 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-01-20 23:41:05,978 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-20 23:41:05,978 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-20 23:41:05,978 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-20 23:41:05,978 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-20 23:41:05,979 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-20 23:41:05,979 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-20 23:41:05,979 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-20 23:41:05,979 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-20 23:41:05,979 INFO L133 SettingsManager]: * Stop after first violation was found=false [2018-01-20 23:41:05,979 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-01-20 23:41:05,979 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-20 23:41:05,979 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-20 23:41:05,979 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-20 23:41:05,980 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-01-20 23:41:05,980 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-20 23:41:05,980 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-20 23:41:06,013 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-20 23:41:06,023 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-20 23:41:06,026 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-20 23:41:06,028 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-20 23:41:06,028 INFO L276 PluginConnector]: CDTParser initialized [2018-01-20 23:41:06,029 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/memsafety-ext2/complex_data_creation_test01_true-valid-memsafety.i [2018-01-20 23:41:06,209 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-20 23:41:06,213 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-20 23:41:06,214 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-20 23:41:06,214 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-20 23:41:06,219 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-20 23:41:06,220 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.01 11:41:06" (1/1) ... [2018-01-20 23:41:06,223 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@42bb0702 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 11:41:06, skipping insertion in model container [2018-01-20 23:41:06,223 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.01 11:41:06" (1/1) ... [2018-01-20 23:41:06,237 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-20 23:41:06,276 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-20 23:41:06,402 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-20 23:41:06,431 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-20 23:41:06,442 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 11:41:06 WrapperNode [2018-01-20 23:41:06,442 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-20 23:41:06,443 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-20 23:41:06,443 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-20 23:41:06,443 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-20 23:41:06,456 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 11:41:06" (1/1) ... [2018-01-20 23:41:06,457 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 11:41:06" (1/1) ... [2018-01-20 23:41:06,467 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 11:41:06" (1/1) ... [2018-01-20 23:41:06,467 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 11:41:06" (1/1) ... [2018-01-20 23:41:06,477 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 11:41:06" (1/1) ... [2018-01-20 23:41:06,481 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 11:41:06" (1/1) ... [2018-01-20 23:41:06,484 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 11:41:06" (1/1) ... [2018-01-20 23:41:06,487 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-20 23:41:06,488 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-20 23:41:06,488 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-20 23:41:06,488 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-20 23:41:06,489 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 11:41:06" (1/1) ... No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-20 23:41:06,537 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-20 23:41:06,537 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-20 23:41:06,537 INFO L136 BoogieDeclarations]: Found implementation of procedure create_data [2018-01-20 23:41:06,537 INFO L136 BoogieDeclarations]: Found implementation of procedure freeData [2018-01-20 23:41:06,537 INFO L136 BoogieDeclarations]: Found implementation of procedure append [2018-01-20 23:41:06,538 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-20 23:41:06,538 INFO L128 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2018-01-20 23:41:06,538 INFO L128 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2018-01-20 23:41:06,538 INFO L128 BoogieDeclarations]: Found specification of procedure write~int [2018-01-20 23:41:06,538 INFO L128 BoogieDeclarations]: Found specification of procedure read~int [2018-01-20 23:41:06,538 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-01-20 23:41:06,539 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-01-20 23:41:06,539 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-01-20 23:41:06,539 INFO L128 BoogieDeclarations]: Found specification of procedure malloc [2018-01-20 23:41:06,539 INFO L128 BoogieDeclarations]: Found specification of procedure free [2018-01-20 23:41:06,539 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-01-20 23:41:06,539 INFO L128 BoogieDeclarations]: Found specification of procedure create_data [2018-01-20 23:41:06,539 INFO L128 BoogieDeclarations]: Found specification of procedure freeData [2018-01-20 23:41:06,540 INFO L128 BoogieDeclarations]: Found specification of procedure append [2018-01-20 23:41:06,540 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-20 23:41:06,540 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-20 23:41:06,540 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-20 23:41:06,987 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-20 23:41:06,988 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.01 11:41:06 BoogieIcfgContainer [2018-01-20 23:41:06,988 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-20 23:41:06,989 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-01-20 23:41:06,990 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-01-20 23:41:06,992 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-01-20 23:41:06,993 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.01 11:41:06" (1/3) ... [2018-01-20 23:41:06,994 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@307db43c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.01 11:41:06, skipping insertion in model container [2018-01-20 23:41:06,994 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 11:41:06" (2/3) ... [2018-01-20 23:41:06,995 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@307db43c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.01 11:41:06, skipping insertion in model container [2018-01-20 23:41:06,995 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.01 11:41:06" (3/3) ... [2018-01-20 23:41:06,997 INFO L105 eAbstractionObserver]: Analyzing ICFG complex_data_creation_test01_true-valid-memsafety.i [2018-01-20 23:41:07,007 INFO L130 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-01-20 23:41:07,016 INFO L142 ceAbstractionStarter]: Appying trace abstraction to program that has 6 error locations. [2018-01-20 23:41:07,067 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-20 23:41:07,068 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-20 23:41:07,068 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-20 23:41:07,068 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-20 23:41:07,068 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-20 23:41:07,068 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-20 23:41:07,068 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-20 23:41:07,068 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == create_dataErr0EnsuresViolation======== [2018-01-20 23:41:07,069 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-20 23:41:07,087 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states. [2018-01-20 23:41:07,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-01-20 23:41:07,094 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 23:41:07,095 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] [2018-01-20 23:41:07,095 INFO L371 AbstractCegarLoop]: === Iteration 1 === [create_dataErr0EnsuresViolation]=== [2018-01-20 23:41:07,099 INFO L82 PathProgramCache]: Analyzing trace with hash 1561242995, now seen corresponding path program 1 times [2018-01-20 23:41:07,101 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-20 23:41:07,145 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 23:41:07,145 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 23:41:07,145 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 23:41:07,146 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-20 23:41:07,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 23:41:07,216 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 23:41:07,325 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 23:41:07,327 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-20 23:41:07,328 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-20 23:41:07,328 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-20 23:41:07,331 INFO L409 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-01-20 23:41:07,407 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-01-20 23:41:07,408 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-01-20 23:41:07,410 INFO L87 Difference]: Start difference. First operand 128 states. Second operand 3 states. [2018-01-20 23:41:07,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 23:41:07,453 INFO L93 Difference]: Finished difference Result 248 states and 284 transitions. [2018-01-20 23:41:07,454 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-01-20 23:41:07,455 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2018-01-20 23:41:07,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 23:41:07,464 INFO L225 Difference]: With dead ends: 248 [2018-01-20 23:41:07,464 INFO L226 Difference]: Without dead ends: 96 [2018-01-20 23:41:07,469 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-01-20 23:41:07,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2018-01-20 23:41:07,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2018-01-20 23:41:07,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2018-01-20 23:41:07,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 107 transitions. [2018-01-20 23:41:07,505 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 107 transitions. Word has length 25 [2018-01-20 23:41:07,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 23:41:07,506 INFO L432 AbstractCegarLoop]: Abstraction has 96 states and 107 transitions. [2018-01-20 23:41:07,506 INFO L433 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-01-20 23:41:07,506 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 107 transitions. [2018-01-20 23:41:07,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-01-20 23:41:07,508 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 23:41:07,509 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] [2018-01-20 23:41:07,509 INFO L371 AbstractCegarLoop]: === Iteration 2 === [create_dataErr0EnsuresViolation]=== [2018-01-20 23:41:07,509 INFO L82 PathProgramCache]: Analyzing trace with hash 1948874992, now seen corresponding path program 1 times [2018-01-20 23:41:07,509 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-20 23:41:07,510 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 23:41:07,511 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 23:41:07,511 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 23:41:07,511 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-20 23:41:07,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 23:41:07,534 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 23:41:07,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 23:41:07,609 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-20 23:41:07,609 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-01-20 23:41:07,610 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-20 23:41:07,611 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-20 23:41:07,611 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-20 23:41:07,612 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-20 23:41:07,612 INFO L87 Difference]: Start difference. First operand 96 states and 107 transitions. Second operand 4 states. [2018-01-20 23:41:07,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 23:41:07,670 INFO L93 Difference]: Finished difference Result 234 states and 263 transitions. [2018-01-20 23:41:07,670 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-20 23:41:07,671 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2018-01-20 23:41:07,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 23:41:07,672 INFO L225 Difference]: With dead ends: 234 [2018-01-20 23:41:07,672 INFO L226 Difference]: Without dead ends: 146 [2018-01-20 23:41:07,673 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 [2018-01-20 23:41:07,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2018-01-20 23:41:07,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 145. [2018-01-20 23:41:07,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2018-01-20 23:41:07,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 161 transitions. [2018-01-20 23:41:07,683 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 161 transitions. Word has length 27 [2018-01-20 23:41:07,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 23:41:07,683 INFO L432 AbstractCegarLoop]: Abstraction has 145 states and 161 transitions. [2018-01-20 23:41:07,683 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-20 23:41:07,683 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 161 transitions. [2018-01-20 23:41:07,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-01-20 23:41:07,684 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 23:41:07,684 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] [2018-01-20 23:41:07,684 INFO L371 AbstractCegarLoop]: === Iteration 3 === [create_dataErr0EnsuresViolation]=== [2018-01-20 23:41:07,685 INFO L82 PathProgramCache]: Analyzing trace with hash -245124692, now seen corresponding path program 1 times [2018-01-20 23:41:07,685 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-20 23:41:07,685 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 23:41:07,686 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 23:41:07,686 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 23:41:07,686 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-20 23:41:07,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 23:41:07,708 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 23:41:07,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 23:41:07,745 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-20 23:41:07,745 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-20 23:41:07,745 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-20 23:41:07,745 INFO L409 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-01-20 23:41:07,746 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-01-20 23:41:07,746 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-01-20 23:41:07,746 INFO L87 Difference]: Start difference. First operand 145 states and 161 transitions. Second operand 3 states. [2018-01-20 23:41:07,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 23:41:07,804 INFO L93 Difference]: Finished difference Result 147 states and 163 transitions. [2018-01-20 23:41:07,806 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-01-20 23:41:07,806 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2018-01-20 23:41:07,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 23:41:07,808 INFO L225 Difference]: With dead ends: 147 [2018-01-20 23:41:07,808 INFO L226 Difference]: Without dead ends: 146 [2018-01-20 23:41:07,809 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 [2018-01-20 23:41:07,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2018-01-20 23:41:07,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 146. [2018-01-20 23:41:07,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2018-01-20 23:41:07,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 162 transitions. [2018-01-20 23:41:07,821 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 162 transitions. Word has length 29 [2018-01-20 23:41:07,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 23:41:07,822 INFO L432 AbstractCegarLoop]: Abstraction has 146 states and 162 transitions. [2018-01-20 23:41:07,822 INFO L433 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-01-20 23:41:07,822 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 162 transitions. [2018-01-20 23:41:07,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-01-20 23:41:07,824 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 23:41:07,824 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] [2018-01-20 23:41:07,824 INFO L371 AbstractCegarLoop]: === Iteration 4 === [create_dataErr0EnsuresViolation]=== [2018-01-20 23:41:07,824 INFO L82 PathProgramCache]: Analyzing trace with hash 1224197024, now seen corresponding path program 1 times [2018-01-20 23:41:07,824 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-20 23:41:07,825 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 23:41:07,826 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 23:41:07,826 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 23:41:07,826 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-20 23:41:07,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 23:41:07,851 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 23:41:07,894 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 23:41:07,894 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-20 23:41:07,894 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-20 23:41:07,894 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-20 23:41:07,895 INFO L409 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-01-20 23:41:07,895 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-01-20 23:41:07,895 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-01-20 23:41:07,895 INFO L87 Difference]: Start difference. First operand 146 states and 162 transitions. Second operand 3 states. [2018-01-20 23:41:07,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 23:41:07,913 INFO L93 Difference]: Finished difference Result 298 states and 335 transitions. [2018-01-20 23:41:07,913 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-01-20 23:41:07,913 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 43 [2018-01-20 23:41:07,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 23:41:07,915 INFO L225 Difference]: With dead ends: 298 [2018-01-20 23:41:07,915 INFO L226 Difference]: Without dead ends: 160 [2018-01-20 23:41:07,916 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-01-20 23:41:07,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2018-01-20 23:41:07,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 150. [2018-01-20 23:41:07,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2018-01-20 23:41:07,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 166 transitions. [2018-01-20 23:41:07,927 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 166 transitions. Word has length 43 [2018-01-20 23:41:07,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 23:41:07,928 INFO L432 AbstractCegarLoop]: Abstraction has 150 states and 166 transitions. [2018-01-20 23:41:07,928 INFO L433 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-01-20 23:41:07,928 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 166 transitions. [2018-01-20 23:41:07,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-01-20 23:41:07,930 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 23:41:07,930 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] [2018-01-20 23:41:07,930 INFO L371 AbstractCegarLoop]: === Iteration 5 === [create_dataErr0EnsuresViolation]=== [2018-01-20 23:41:07,930 INFO L82 PathProgramCache]: Analyzing trace with hash 1546322841, now seen corresponding path program 1 times [2018-01-20 23:41:07,930 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-20 23:41:07,931 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 23:41:07,931 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 23:41:07,931 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 23:41:07,931 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-20 23:41:07,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 23:41:07,959 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 23:41:08,005 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 23:41:08,006 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 23:41:08,006 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-20 23:41:08,006 INFO L199 CegarAbsIntRunner]: Running AI on error trace of length 51 with the following transitions: [2018-01-20 23:41:08,008 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] [2018-01-20 23:41:08,055 INFO L147 AbstractInterpreter]: Using domain VPDomain [2018-01-20 23:41:08,055 INFO L101 FixpointEngine]: Starting fixpoint engine with domain VPDomain (maxUnwinding=3, maxParallelStates=2) [2018-01-20 23:41:49,766 INFO L259 AbstractInterpreter]: Some error location(s) were reachable [2018-01-20 23:41:49,767 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. [2018-01-20 23:41:49,790 INFO L434 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-01-20 23:41:49,790 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 23:41:49,791 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-20 23:41:49,800 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 23:41:49,800 INFO L280 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-01-20 23:41:49,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 23:41:49,851 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 23:41:49,866 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 23:41:49,866 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-20 23:41:49,899 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 23:41:49,932 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 23:41:49,933 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 3 with cvc4 --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with cvc4 --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-01-20 23:41:49,936 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 23:41:49,937 INFO L280 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-01-20 23:41:49,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 23:41:49,999 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 23:41:50,006 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 23:41:50,006 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-20 23:41:50,036 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 23:41:50,038 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-01-20 23:41:50,039 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4] total 7 [2018-01-20 23:41:50,039 INFO L247 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-01-20 23:41:50,040 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-20 23:41:50,040 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-20 23:41:50,040 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-01-20 23:41:50,040 INFO L87 Difference]: Start difference. First operand 150 states and 166 transitions. Second operand 5 states. [2018-01-20 23:41:50,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 23:41:50,120 INFO L93 Difference]: Finished difference Result 316 states and 353 transitions. [2018-01-20 23:41:50,120 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-01-20 23:41:50,120 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 50 [2018-01-20 23:41:50,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 23:41:50,122 INFO L225 Difference]: With dead ends: 316 [2018-01-20 23:41:50,122 INFO L226 Difference]: Without dead ends: 174 [2018-01-20 23:41:50,123 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 [2018-01-20 23:41:50,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2018-01-20 23:41:50,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 164. [2018-01-20 23:41:50,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2018-01-20 23:41:50,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 180 transitions. [2018-01-20 23:41:50,137 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 180 transitions. Word has length 50 [2018-01-20 23:41:50,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 23:41:50,137 INFO L432 AbstractCegarLoop]: Abstraction has 164 states and 180 transitions. [2018-01-20 23:41:50,137 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-20 23:41:50,137 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 180 transitions. [2018-01-20 23:41:50,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-01-20 23:41:50,140 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 23:41:50,140 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] [2018-01-20 23:41:50,140 INFO L371 AbstractCegarLoop]: === Iteration 6 === [create_dataErr0EnsuresViolation]=== [2018-01-20 23:41:50,141 INFO L82 PathProgramCache]: Analyzing trace with hash 1302825344, now seen corresponding path program 2 times [2018-01-20 23:41:50,141 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-20 23:41:50,142 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 23:41:50,142 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 23:41:50,142 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 23:41:50,142 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-20 23:41:50,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 23:41:50,172 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 23:41:50,254 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 23:41:50,254 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 23:41:50,255 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-20 23:41:50,255 INFO L183 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-01-20 23:41:50,255 INFO L434 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-01-20 23:41:50,255 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 23:41:50,255 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-20 23:41:50,289 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-20 23:41:50,289 INFO L280 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-01-20 23:41:50,325 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 23:41:50,357 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 23:41:50,359 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 23:41:50,364 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 23:41:50,384 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 23:41:50,384 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-20 23:41:50,447 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 23:41:50,481 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 23:41:50,481 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 5 with cvc4 --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with cvc4 --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-01-20 23:41:50,485 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-20 23:41:50,485 INFO L280 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-01-20 23:41:50,520 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 23:41:50,764 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 23:41:50,785 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 23:41:50,792 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 23:41:50,798 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 23:41:50,799 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-20 23:41:50,814 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 23:41:50,816 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-01-20 23:41:50,817 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5] total 9 [2018-01-20 23:41:50,817 INFO L247 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-01-20 23:41:50,817 INFO L409 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-01-20 23:41:50,817 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-01-20 23:41:50,818 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-01-20 23:41:50,818 INFO L87 Difference]: Start difference. First operand 164 states and 180 transitions. Second operand 6 states. [2018-01-20 23:41:50,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 23:41:50,897 INFO L93 Difference]: Finished difference Result 344 states and 381 transitions. [2018-01-20 23:41:50,897 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-20 23:41:50,897 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 57 [2018-01-20 23:41:50,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 23:41:50,899 INFO L225 Difference]: With dead ends: 344 [2018-01-20 23:41:50,899 INFO L226 Difference]: Without dead ends: 188 [2018-01-20 23:41:50,900 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 224 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-01-20 23:41:50,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2018-01-20 23:41:50,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 178. [2018-01-20 23:41:50,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2018-01-20 23:41:50,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 194 transitions. [2018-01-20 23:41:50,911 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 194 transitions. Word has length 57 [2018-01-20 23:41:50,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 23:41:50,911 INFO L432 AbstractCegarLoop]: Abstraction has 178 states and 194 transitions. [2018-01-20 23:41:50,911 INFO L433 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-01-20 23:41:50,911 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 194 transitions. [2018-01-20 23:41:50,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-01-20 23:41:50,913 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 23:41:50,914 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] [2018-01-20 23:41:50,914 INFO L371 AbstractCegarLoop]: === Iteration 7 === [create_dataErr0EnsuresViolation]=== [2018-01-20 23:41:50,914 INFO L82 PathProgramCache]: Analyzing trace with hash -1322589767, now seen corresponding path program 3 times [2018-01-20 23:41:50,914 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-20 23:41:50,915 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 23:41:50,915 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 23:41:50,915 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 23:41:50,916 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-20 23:41:50,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 23:41:50,940 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 23:41:51,016 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 23:41:51,016 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 23:41:51,016 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-20 23:41:51,016 INFO L183 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-01-20 23:41:51,017 INFO L434 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-01-20 23:41:51,017 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 23:41:51,017 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-20 23:41:51,025 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-20 23:41:51,025 INFO L280 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-01-20 23:41:51,056 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 23:41:51,088 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 23:41:51,182 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 23:41:51,238 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 23:41:51,240 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 23:41:51,245 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 23:41:51,277 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 23:41:51,277 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-20 23:41:51,377 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 23:41:51,415 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 23:41:51,415 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 7 with cvc4 --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with cvc4 --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-01-20 23:41:51,421 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-20 23:41:51,421 INFO L280 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-01-20 23:41:51,466 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 23:41:51,705 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 23:41:52,582 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 23:41:59,044 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-20 23:41:59,114 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 23:41:59,121 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 23:41:59,128 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 23:41:59,128 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-20 23:41:59,141 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 23:41:59,144 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-01-20 23:41:59,144 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6] total 11 [2018-01-20 23:41:59,144 INFO L247 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-01-20 23:41:59,145 INFO L409 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-01-20 23:41:59,145 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-01-20 23:41:59,145 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-01-20 23:41:59,145 INFO L87 Difference]: Start difference. First operand 178 states and 194 transitions. Second operand 7 states. [2018-01-20 23:41:59,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 23:41:59,193 INFO L93 Difference]: Finished difference Result 372 states and 409 transitions. [2018-01-20 23:41:59,194 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-01-20 23:41:59,194 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 64 [2018-01-20 23:41:59,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 23:41:59,196 INFO L225 Difference]: With dead ends: 372 [2018-01-20 23:41:59,196 INFO L226 Difference]: Without dead ends: 202 [2018-01-20 23:41:59,197 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 251 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-01-20 23:41:59,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2018-01-20 23:41:59,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 192. [2018-01-20 23:41:59,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2018-01-20 23:41:59,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 208 transitions. [2018-01-20 23:41:59,206 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 208 transitions. Word has length 64 [2018-01-20 23:41:59,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 23:41:59,206 INFO L432 AbstractCegarLoop]: Abstraction has 192 states and 208 transitions. [2018-01-20 23:41:59,206 INFO L433 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-01-20 23:41:59,206 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 208 transitions. [2018-01-20 23:41:59,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2018-01-20 23:41:59,208 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 23:41:59,208 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] [2018-01-20 23:41:59,208 INFO L371 AbstractCegarLoop]: === Iteration 8 === [create_dataErr0EnsuresViolation]=== [2018-01-20 23:41:59,209 INFO L82 PathProgramCache]: Analyzing trace with hash 1826064224, now seen corresponding path program 4 times [2018-01-20 23:41:59,209 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-20 23:41:59,209 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 23:41:59,210 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 23:41:59,210 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 23:41:59,210 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-20 23:41:59,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 23:41:59,233 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 23:41:59,310 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 23:41:59,311 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 23:41:59,311 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-20 23:41:59,311 INFO L183 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-01-20 23:41:59,311 INFO L434 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-01-20 23:41:59,311 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 23:41:59,311 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-20 23:41:59,316 INFO L101 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-01-20 23:41:59,316 INFO L280 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-01-20 23:41:59,518 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 23:41:59,521 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 23:41:59,541 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 23:41:59,541 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-20 23:41:59,624 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 23:41:59,656 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 23:41:59,656 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 9 with cvc4 --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with cvc4 --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-01-20 23:41:59,659 INFO L101 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-01-20 23:41:59,660 INFO L280 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-01-20 23:42:03,858 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 23:42:03,865 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 23:42:03,874 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 23:42:03,874 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-20 23:42:03,896 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 23:42:03,899 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-01-20 23:42:03,899 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7] total 13 [2018-01-20 23:42:03,900 INFO L247 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-01-20 23:42:03,900 INFO L409 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-01-20 23:42:03,900 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-01-20 23:42:03,900 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-01-20 23:42:03,901 INFO L87 Difference]: Start difference. First operand 192 states and 208 transitions. Second operand 8 states. [2018-01-20 23:42:03,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 23:42:03,928 INFO L93 Difference]: Finished difference Result 400 states and 437 transitions. [2018-01-20 23:42:03,928 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-01-20 23:42:03,928 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 71 [2018-01-20 23:42:03,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 23:42:03,930 INFO L225 Difference]: With dead ends: 400 [2018-01-20 23:42:03,930 INFO L226 Difference]: Without dead ends: 216 [2018-01-20 23:42:03,930 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 [2018-01-20 23:42:03,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2018-01-20 23:42:03,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 206. [2018-01-20 23:42:03,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2018-01-20 23:42:03,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 222 transitions. [2018-01-20 23:42:03,938 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 222 transitions. Word has length 71 [2018-01-20 23:42:03,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 23:42:03,939 INFO L432 AbstractCegarLoop]: Abstraction has 206 states and 222 transitions. [2018-01-20 23:42:03,939 INFO L433 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-01-20 23:42:03,939 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 222 transitions. [2018-01-20 23:42:03,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-01-20 23:42:03,940 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 23:42:03,941 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] [2018-01-20 23:42:03,941 INFO L371 AbstractCegarLoop]: === Iteration 9 === [create_dataErr0EnsuresViolation]=== [2018-01-20 23:42:03,941 INFO L82 PathProgramCache]: Analyzing trace with hash 1568376793, now seen corresponding path program 5 times [2018-01-20 23:42:03,941 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-20 23:42:03,942 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 23:42:03,942 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 23:42:03,942 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 23:42:03,942 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-20 23:42:03,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 23:42:03,966 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 23:42:04,063 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 23:42:04,063 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 23:42:04,063 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-20 23:42:04,063 INFO L183 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-01-20 23:42:04,063 INFO L434 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-01-20 23:42:04,064 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 23:42:04,064 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-20 23:42:04,081 INFO L101 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-01-20 23:42:04,082 INFO L280 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder INSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-01-20 23:42:04,098 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 23:42:04,101 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 23:42:04,105 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 23:42:04,116 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 23:42:04,126 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 23:42:04,152 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 23:42:04,155 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 23:42:04,157 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 23:42:04,173 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 23:42:04,173 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-20 23:42:04,263 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 23:42:04,284 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 23:42:04,285 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 11 with cvc4 --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with cvc4 --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-01-20 23:42:04,300 INFO L101 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-01-20 23:42:04,300 INFO L280 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder INSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-01-20 23:42:04,315 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 23:42:04,321 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 23:42:04,331 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 23:42:04,355 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 23:42:04,407 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 23:42:04,525 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-20 23:42:04,547 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 23:42:04,554 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 23:42:04,565 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 23:42:04,565 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-20 23:42:04,584 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 23:42:04,586 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-01-20 23:42:04,586 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8] total 15 [2018-01-20 23:42:04,586 INFO L247 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-01-20 23:42:04,587 INFO L409 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-01-20 23:42:04,587 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-01-20 23:42:04,587 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-01-20 23:42:04,587 INFO L87 Difference]: Start difference. First operand 206 states and 222 transitions. Second operand 9 states. [2018-01-20 23:42:04,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 23:42:04,618 INFO L93 Difference]: Finished difference Result 428 states and 465 transitions. [2018-01-20 23:42:04,619 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-01-20 23:42:04,619 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 78 [2018-01-20 23:42:04,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 23:42:04,620 INFO L225 Difference]: With dead ends: 428 [2018-01-20 23:42:04,620 INFO L226 Difference]: Without dead ends: 230 [2018-01-20 23:42:04,621 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 [2018-01-20 23:42:04,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2018-01-20 23:42:04,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 220. [2018-01-20 23:42:04,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 220 states. [2018-01-20 23:42:04,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 236 transitions. [2018-01-20 23:42:04,629 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 236 transitions. Word has length 78 [2018-01-20 23:42:04,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 23:42:04,630 INFO L432 AbstractCegarLoop]: Abstraction has 220 states and 236 transitions. [2018-01-20 23:42:04,630 INFO L433 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-01-20 23:42:04,630 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 236 transitions. [2018-01-20 23:42:04,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2018-01-20 23:42:04,631 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 23:42:04,631 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] [2018-01-20 23:42:04,632 INFO L371 AbstractCegarLoop]: === Iteration 10 === [create_dataErr0EnsuresViolation]=== [2018-01-20 23:42:04,632 INFO L82 PathProgramCache]: Analyzing trace with hash 1170586944, now seen corresponding path program 6 times [2018-01-20 23:42:04,632 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-20 23:42:04,633 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 23:42:04,633 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-20 23:42:04,633 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 23:42:04,633 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-20 23:42:04,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 23:42:04,656 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 23:42:04,752 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 23:42:04,753 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 23:42:04,753 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-20 23:42:04,753 INFO L183 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-01-20 23:42:04,753 INFO L434 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-01-20 23:42:04,753 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 23:42:04,753 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-20 23:42:04,759 INFO L101 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-01-20 23:42:04,760 INFO L280 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder MIX_INSIDE_OUTSIDE (IT: FPandBP) [2018-01-20 23:42:04,782 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 23:42:04,805 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 23:42:04,861 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 23:42:04,900 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 23:42:05,047 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 23:42:05,412 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 23:42:06,039 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 23:42:06,041 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-20 23:42:06,044 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-20 23:42:06,078 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 23:42:06,078 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-20 23:42:06,138 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 23:42:06,160 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 23:42:06,160 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 13 with cvc4 --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with cvc4 --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-01-20 23:42:06,164 INFO L101 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-01-20 23:42:06,164 INFO L280 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder MIX_INSIDE_OUTSIDE (IT: FPandBP) [2018-01-20 23:42:06,191 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 23:42:06,313 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-20 23:42:06,570 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command Received shutdown request... [2018-01-20 23:42:08,053 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command Cannot interrupt operation gracefully because timeout expired. Forcing shutdown