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/svcomp-DerefFreeMemtrack-32bit-Automizer_Taipan+AI_EQ_mostprecise.epf -i ../../../trunk/examples/svcomp/memsafety-ext/dll_extends_pointer_true-valid-memsafety.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-6b94a2f [2018-01-24 20:17:28,403 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-24 20:17:28,405 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-24 20:17:28,420 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-24 20:17:28,420 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-24 20:17:28,421 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-24 20:17:28,422 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-24 20:17:28,424 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-24 20:17:28,425 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-24 20:17:28,426 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-24 20:17:28,426 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-01-24 20:17:28,426 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-01-24 20:17:28,427 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-01-24 20:17:28,428 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-01-24 20:17:28,428 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-01-24 20:17:28,431 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-01-24 20:17:28,433 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-01-24 20:17:28,435 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-01-24 20:17:28,436 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-01-24 20:17:28,437 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-01-24 20:17:28,439 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-01-24 20:17:28,440 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-01-24 20:17:28,440 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-01-24 20:17:28,441 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-01-24 20:17:28,442 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-01-24 20:17:28,443 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-01-24 20:17:28,443 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-01-24 20:17:28,444 INFO L177 SettingsManager]: PEA to Boogie provides no preferences, ignoring... [2018-01-24 20:17:28,444 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-01-24 20:17:28,444 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-01-24 20:17:28,445 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-01-24 20:17:28,445 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/eq-bench/svcomp-DerefFreeMemtrack-32bit-Automizer_Taipan+AI_EQ_mostprecise.epf [2018-01-24 20:17:28,455 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-24 20:17:28,455 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-24 20:17:28,456 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-24 20:17:28,456 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-24 20:17:28,457 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-24 20:17:28,457 INFO L133 SettingsManager]: * Weq Fattening=true [2018-01-24 20:17:28,457 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-24 20:17:28,457 INFO L133 SettingsManager]: * Precise comparison operator=true [2018-01-24 20:17:28,457 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-24 20:17:28,458 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-24 20:17:28,458 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-24 20:17:28,458 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-24 20:17:28,459 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-24 20:17:28,459 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-24 20:17:28,459 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-24 20:17:28,459 INFO L133 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2018-01-24 20:17:28,459 INFO L133 SettingsManager]: * Bitprecise bitfields=true [2018-01-24 20:17:28,460 INFO L133 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2018-01-24 20:17:28,460 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-24 20:17:28,460 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-24 20:17:28,460 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-24 20:17:28,461 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-01-24 20:17:28,461 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-24 20:17:28,461 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-24 20:17:28,461 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-24 20:17:28,461 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-24 20:17:28,462 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-24 20:17:28,462 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-24 20:17:28,462 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-24 20:17:28,462 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-24 20:17:28,462 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-01-24 20:17:28,463 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-24 20:17:28,463 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-24 20:17:28,463 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-24 20:17:28,463 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-01-24 20:17:28,464 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-24 20:17:28,464 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-24 20:17:28,499 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-24 20:17:28,512 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-24 20:17:28,516 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-24 20:17:28,518 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-24 20:17:28,519 INFO L276 PluginConnector]: CDTParser initialized [2018-01-24 20:17:28,519 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/memsafety-ext/dll_extends_pointer_true-valid-memsafety.i [2018-01-24 20:17:28,700 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-24 20:17:28,707 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-24 20:17:28,708 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-24 20:17:28,708 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-24 20:17:28,715 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-24 20:17:28,716 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.01 08:17:28" (1/1) ... [2018-01-24 20:17:28,720 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f4d08b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 08:17:28, skipping insertion in model container [2018-01-24 20:17:28,720 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.01 08:17:28" (1/1) ... [2018-01-24 20:17:28,738 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-24 20:17:28,777 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-24 20:17:28,896 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-24 20:17:28,912 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-24 20:17:28,919 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 08:17:28 WrapperNode [2018-01-24 20:17:28,920 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-24 20:17:28,921 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-24 20:17:28,921 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-24 20:17:28,921 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-24 20:17:28,938 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 08:17:28" (1/1) ... [2018-01-24 20:17:28,938 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 08:17:28" (1/1) ... [2018-01-24 20:17:28,949 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 08:17:28" (1/1) ... [2018-01-24 20:17:28,949 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 08:17:28" (1/1) ... [2018-01-24 20:17:28,952 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 08:17:28" (1/1) ... [2018-01-24 20:17:28,955 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 08:17:28" (1/1) ... [2018-01-24 20:17:28,956 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 08:17:28" (1/1) ... [2018-01-24 20:17:28,958 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-24 20:17:28,958 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-24 20:17:28,958 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-24 20:17:28,958 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-24 20:17:28,959 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 08:17:28" (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 [2018-01-24 20:17:29,006 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-24 20:17:29,006 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-24 20:17:29,006 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-24 20:17:29,006 INFO L128 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2018-01-24 20:17:29,006 INFO L128 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2018-01-24 20:17:29,007 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-01-24 20:17:29,007 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-01-24 20:17:29,007 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-01-24 20:17:29,007 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-01-24 20:17:29,007 INFO L128 BoogieDeclarations]: Found specification of procedure malloc [2018-01-24 20:17:29,007 INFO L128 BoogieDeclarations]: Found specification of procedure free [2018-01-24 20:17:29,007 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-24 20:17:29,007 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-24 20:17:29,007 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-24 20:17:29,281 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-24 20:17:29,282 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.01 08:17:29 BoogieIcfgContainer [2018-01-24 20:17:29,282 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-24 20:17:29,283 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-01-24 20:17:29,283 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-01-24 20:17:29,285 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-01-24 20:17:29,285 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.01 08:17:28" (1/3) ... [2018-01-24 20:17:29,286 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32f5d46b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.01 08:17:29, skipping insertion in model container [2018-01-24 20:17:29,287 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 08:17:28" (2/3) ... [2018-01-24 20:17:29,287 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32f5d46b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.01 08:17:29, skipping insertion in model container [2018-01-24 20:17:29,287 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.01 08:17:29" (3/3) ... [2018-01-24 20:17:29,289 INFO L105 eAbstractionObserver]: Analyzing ICFG dll_extends_pointer_true-valid-memsafety.i [2018-01-24 20:17:29,296 INFO L130 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-01-24 20:17:29,303 INFO L142 ceAbstractionStarter]: Appying trace abstraction to program that has 25 error locations. [2018-01-24 20:17:29,339 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-24 20:17:29,339 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-24 20:17:29,340 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-24 20:17:29,340 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-24 20:17:29,340 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-24 20:17:29,340 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-24 20:17:29,340 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-24 20:17:29,340 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-01-24 20:17:29,341 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-24 20:17:29,358 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states. [2018-01-24 20:17:29,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-01-24 20:17:29,363 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 20:17:29,364 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 20:17:29,364 INFO L371 AbstractCegarLoop]: === Iteration 1 === [mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr0RequiresViolation, mainErr21RequiresViolation, mainErr3RequiresViolation, mainErr15RequiresViolation, mainErr16RequiresViolation, mainErr2RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr1RequiresViolation, mainErr17RequiresViolation, mainErr9RequiresViolation, mainErr24EnsuresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr11RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr4RequiresViolation, mainErr14RequiresViolation]=== [2018-01-24 20:17:29,368 INFO L82 PathProgramCache]: Analyzing trace with hash -1414487999, now seen corresponding path program 1 times [2018-01-24 20:17:29,370 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 20:17:29,411 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:17:29,411 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 20:17:29,411 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:17:29,411 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 20:17:29,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 20:17:29,454 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 20:17:29,531 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 20:17:29,534 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 20:17:29,534 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-24 20:17:29,534 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 20:17:29,537 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-24 20:17:29,551 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-24 20:17:29,551 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-24 20:17:29,554 INFO L87 Difference]: Start difference. First operand 65 states. Second operand 4 states. [2018-01-24 20:17:29,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 20:17:29,968 INFO L93 Difference]: Finished difference Result 113 states and 127 transitions. [2018-01-24 20:17:29,968 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-24 20:17:29,970 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2018-01-24 20:17:29,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 20:17:29,978 INFO L225 Difference]: With dead ends: 113 [2018-01-24 20:17:29,978 INFO L226 Difference]: Without dead ends: 78 [2018-01-24 20:17:29,980 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-01-24 20:17:29,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2018-01-24 20:17:30,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 57. [2018-01-24 20:17:30,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-01-24 20:17:30,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 61 transitions. [2018-01-24 20:17:30,009 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 61 transitions. Word has length 9 [2018-01-24 20:17:30,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 20:17:30,010 INFO L432 AbstractCegarLoop]: Abstraction has 57 states and 61 transitions. [2018-01-24 20:17:30,010 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-24 20:17:30,010 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 61 transitions. [2018-01-24 20:17:30,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-01-24 20:17:30,010 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 20:17:30,010 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 20:17:30,011 INFO L371 AbstractCegarLoop]: === Iteration 2 === [mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr0RequiresViolation, mainErr21RequiresViolation, mainErr3RequiresViolation, mainErr15RequiresViolation, mainErr16RequiresViolation, mainErr2RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr1RequiresViolation, mainErr17RequiresViolation, mainErr9RequiresViolation, mainErr24EnsuresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr11RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr4RequiresViolation, mainErr14RequiresViolation]=== [2018-01-24 20:17:30,011 INFO L82 PathProgramCache]: Analyzing trace with hash -1414487998, now seen corresponding path program 1 times [2018-01-24 20:17:30,011 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 20:17:30,012 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:17:30,012 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 20:17:30,012 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:17:30,012 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 20:17:30,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 20:17:30,030 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 20:17:30,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 20:17:30,093 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 20:17:30,093 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-24 20:17:30,093 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 20:17:30,095 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-24 20:17:30,095 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-24 20:17:30,095 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-24 20:17:30,095 INFO L87 Difference]: Start difference. First operand 57 states and 61 transitions. Second operand 4 states. [2018-01-24 20:17:30,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 20:17:30,229 INFO L93 Difference]: Finished difference Result 107 states and 116 transitions. [2018-01-24 20:17:30,229 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-01-24 20:17:30,229 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2018-01-24 20:17:30,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 20:17:30,231 INFO L225 Difference]: With dead ends: 107 [2018-01-24 20:17:30,231 INFO L226 Difference]: Without dead ends: 104 [2018-01-24 20:17:30,232 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-01-24 20:17:30,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2018-01-24 20:17:30,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 54. [2018-01-24 20:17:30,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-01-24 20:17:30,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 58 transitions. [2018-01-24 20:17:30,241 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 58 transitions. Word has length 9 [2018-01-24 20:17:30,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 20:17:30,241 INFO L432 AbstractCegarLoop]: Abstraction has 54 states and 58 transitions. [2018-01-24 20:17:30,242 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-24 20:17:30,242 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 58 transitions. [2018-01-24 20:17:30,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-01-24 20:17:30,243 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 20:17:30,243 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 20:17:30,243 INFO L371 AbstractCegarLoop]: === Iteration 3 === [mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr0RequiresViolation, mainErr21RequiresViolation, mainErr3RequiresViolation, mainErr15RequiresViolation, mainErr16RequiresViolation, mainErr2RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr1RequiresViolation, mainErr17RequiresViolation, mainErr9RequiresViolation, mainErr24EnsuresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr11RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr4RequiresViolation, mainErr14RequiresViolation]=== [2018-01-24 20:17:30,243 INFO L82 PathProgramCache]: Analyzing trace with hash 689004913, now seen corresponding path program 1 times [2018-01-24 20:17:30,243 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 20:17:30,244 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:17:30,245 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 20:17:30,245 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:17:30,245 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 20:17:30,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 20:17:30,265 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 20:17:30,306 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 20:17:30,306 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 20:17:30,306 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-24 20:17:30,306 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 20:17:30,306 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-24 20:17:30,306 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-24 20:17:30,307 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-24 20:17:30,307 INFO L87 Difference]: Start difference. First operand 54 states and 58 transitions. Second operand 4 states. [2018-01-24 20:17:30,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 20:17:30,410 INFO L93 Difference]: Finished difference Result 67 states and 70 transitions. [2018-01-24 20:17:30,411 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-24 20:17:30,412 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2018-01-24 20:17:30,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 20:17:30,413 INFO L225 Difference]: With dead ends: 67 [2018-01-24 20:17:30,413 INFO L226 Difference]: Without dead ends: 64 [2018-01-24 20:17:30,413 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-01-24 20:17:30,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2018-01-24 20:17:30,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 58. [2018-01-24 20:17:30,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-01-24 20:17:30,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 65 transitions. [2018-01-24 20:17:30,422 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 65 transitions. Word has length 18 [2018-01-24 20:17:30,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 20:17:30,423 INFO L432 AbstractCegarLoop]: Abstraction has 58 states and 65 transitions. [2018-01-24 20:17:30,423 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-24 20:17:30,423 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 65 transitions. [2018-01-24 20:17:30,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-01-24 20:17:30,424 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 20:17:30,424 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 20:17:30,424 INFO L371 AbstractCegarLoop]: === Iteration 4 === [mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr0RequiresViolation, mainErr21RequiresViolation, mainErr3RequiresViolation, mainErr15RequiresViolation, mainErr16RequiresViolation, mainErr2RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr1RequiresViolation, mainErr17RequiresViolation, mainErr9RequiresViolation, mainErr24EnsuresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr11RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr4RequiresViolation, mainErr14RequiresViolation]=== [2018-01-24 20:17:30,424 INFO L82 PathProgramCache]: Analyzing trace with hash 689004914, now seen corresponding path program 1 times [2018-01-24 20:17:30,425 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 20:17:30,426 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:17:30,426 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 20:17:30,426 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:17:30,426 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 20:17:30,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 20:17:30,443 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 20:17:30,552 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 20:17:30,553 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 20:17:30,553 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-01-24 20:17:30,553 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 20:17:30,553 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-24 20:17:30,553 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-24 20:17:30,553 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-01-24 20:17:30,554 INFO L87 Difference]: Start difference. First operand 58 states and 65 transitions. Second operand 5 states. [2018-01-24 20:17:30,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 20:17:30,728 INFO L93 Difference]: Finished difference Result 144 states and 162 transitions. [2018-01-24 20:17:30,728 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-01-24 20:17:30,728 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2018-01-24 20:17:30,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 20:17:30,729 INFO L225 Difference]: With dead ends: 144 [2018-01-24 20:17:30,729 INFO L226 Difference]: Without dead ends: 139 [2018-01-24 20:17:30,730 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2018-01-24 20:17:30,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2018-01-24 20:17:30,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 76. [2018-01-24 20:17:30,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2018-01-24 20:17:30,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 91 transitions. [2018-01-24 20:17:30,737 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 91 transitions. Word has length 18 [2018-01-24 20:17:30,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 20:17:30,737 INFO L432 AbstractCegarLoop]: Abstraction has 76 states and 91 transitions. [2018-01-24 20:17:30,737 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-24 20:17:30,737 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 91 transitions. [2018-01-24 20:17:30,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-01-24 20:17:30,738 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 20:17:30,738 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 20:17:30,738 INFO L371 AbstractCegarLoop]: === Iteration 5 === [mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr0RequiresViolation, mainErr21RequiresViolation, mainErr3RequiresViolation, mainErr15RequiresViolation, mainErr16RequiresViolation, mainErr2RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr1RequiresViolation, mainErr17RequiresViolation, mainErr9RequiresViolation, mainErr24EnsuresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr11RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr4RequiresViolation, mainErr14RequiresViolation]=== [2018-01-24 20:17:30,738 INFO L82 PathProgramCache]: Analyzing trace with hash 689036531, now seen corresponding path program 1 times [2018-01-24 20:17:30,738 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 20:17:30,739 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:17:30,739 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 20:17:30,739 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:17:30,740 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 20:17:30,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 20:17:30,753 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 20:17:30,780 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 20:17:30,780 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 20:17:30,780 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-24 20:17:30,780 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 20:17:30,781 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-24 20:17:30,781 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-24 20:17:30,781 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-24 20:17:30,781 INFO L87 Difference]: Start difference. First operand 76 states and 91 transitions. Second operand 4 states. [2018-01-24 20:17:30,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 20:17:30,855 INFO L93 Difference]: Finished difference Result 93 states and 104 transitions. [2018-01-24 20:17:30,855 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-24 20:17:30,855 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2018-01-24 20:17:30,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 20:17:30,858 INFO L225 Difference]: With dead ends: 93 [2018-01-24 20:17:30,858 INFO L226 Difference]: Without dead ends: 92 [2018-01-24 20:17:30,858 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 [2018-01-24 20:17:30,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2018-01-24 20:17:30,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 75. [2018-01-24 20:17:30,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-01-24 20:17:30,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 89 transitions. [2018-01-24 20:17:30,866 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 89 transitions. Word has length 18 [2018-01-24 20:17:30,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 20:17:30,866 INFO L432 AbstractCegarLoop]: Abstraction has 75 states and 89 transitions. [2018-01-24 20:17:30,866 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-24 20:17:30,866 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 89 transitions. [2018-01-24 20:17:30,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-01-24 20:17:30,867 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 20:17:30,867 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 20:17:30,868 INFO L371 AbstractCegarLoop]: === Iteration 6 === [mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr0RequiresViolation, mainErr21RequiresViolation, mainErr3RequiresViolation, mainErr15RequiresViolation, mainErr16RequiresViolation, mainErr2RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr1RequiresViolation, mainErr17RequiresViolation, mainErr9RequiresViolation, mainErr24EnsuresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr11RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr4RequiresViolation, mainErr14RequiresViolation]=== [2018-01-24 20:17:30,868 INFO L82 PathProgramCache]: Analyzing trace with hash 689036532, now seen corresponding path program 1 times [2018-01-24 20:17:30,868 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 20:17:30,869 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:17:30,869 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 20:17:30,869 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:17:30,870 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 20:17:30,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 20:17:30,882 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 20:17:30,941 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 20:17:30,941 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 20:17:30,941 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-24 20:17:30,941 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 20:17:30,942 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-24 20:17:30,942 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-24 20:17:30,942 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-24 20:17:30,942 INFO L87 Difference]: Start difference. First operand 75 states and 89 transitions. Second operand 4 states. [2018-01-24 20:17:31,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 20:17:31,026 INFO L93 Difference]: Finished difference Result 112 states and 131 transitions. [2018-01-24 20:17:31,027 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-01-24 20:17:31,027 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2018-01-24 20:17:31,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 20:17:31,028 INFO L225 Difference]: With dead ends: 112 [2018-01-24 20:17:31,028 INFO L226 Difference]: Without dead ends: 110 [2018-01-24 20:17:31,028 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 [2018-01-24 20:17:31,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2018-01-24 20:17:31,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 73. [2018-01-24 20:17:31,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-01-24 20:17:31,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 86 transitions. [2018-01-24 20:17:31,035 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 86 transitions. Word has length 18 [2018-01-24 20:17:31,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 20:17:31,036 INFO L432 AbstractCegarLoop]: Abstraction has 73 states and 86 transitions. [2018-01-24 20:17:31,036 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-24 20:17:31,036 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 86 transitions. [2018-01-24 20:17:31,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-01-24 20:17:31,036 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 20:17:31,036 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 20:17:31,037 INFO L371 AbstractCegarLoop]: === Iteration 7 === [mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr0RequiresViolation, mainErr21RequiresViolation, mainErr3RequiresViolation, mainErr15RequiresViolation, mainErr16RequiresViolation, mainErr2RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr1RequiresViolation, mainErr17RequiresViolation, mainErr9RequiresViolation, mainErr24EnsuresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr11RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr4RequiresViolation, mainErr14RequiresViolation]=== [2018-01-24 20:17:31,037 INFO L82 PathProgramCache]: Analyzing trace with hash -115685232, now seen corresponding path program 1 times [2018-01-24 20:17:31,037 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 20:17:31,038 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:17:31,038 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 20:17:31,038 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:17:31,038 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 20:17:31,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 20:17:31,046 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 20:17:31,110 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 20:17:31,111 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 20:17:31,111 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-24 20:17:31,111 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 20:17:31,111 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-24 20:17:31,112 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-24 20:17:31,112 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-01-24 20:17:31,112 INFO L87 Difference]: Start difference. First operand 73 states and 86 transitions. Second operand 5 states. [2018-01-24 20:17:31,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 20:17:31,219 INFO L93 Difference]: Finished difference Result 90 states and 101 transitions. [2018-01-24 20:17:31,220 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-01-24 20:17:31,220 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2018-01-24 20:17:31,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 20:17:31,221 INFO L225 Difference]: With dead ends: 90 [2018-01-24 20:17:31,221 INFO L226 Difference]: Without dead ends: 87 [2018-01-24 20:17:31,222 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2018-01-24 20:17:31,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2018-01-24 20:17:31,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 73. [2018-01-24 20:17:31,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-01-24 20:17:31,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 85 transitions. [2018-01-24 20:17:31,229 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 85 transitions. Word has length 19 [2018-01-24 20:17:31,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 20:17:31,230 INFO L432 AbstractCegarLoop]: Abstraction has 73 states and 85 transitions. [2018-01-24 20:17:31,230 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-24 20:17:31,230 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 85 transitions. [2018-01-24 20:17:31,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-01-24 20:17:31,231 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 20:17:31,231 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] [2018-01-24 20:17:31,231 INFO L371 AbstractCegarLoop]: === Iteration 8 === [mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr0RequiresViolation, mainErr21RequiresViolation, mainErr3RequiresViolation, mainErr15RequiresViolation, mainErr16RequiresViolation, mainErr2RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr1RequiresViolation, mainErr17RequiresViolation, mainErr9RequiresViolation, mainErr24EnsuresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr11RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr4RequiresViolation, mainErr14RequiresViolation]=== [2018-01-24 20:17:31,231 INFO L82 PathProgramCache]: Analyzing trace with hash 580005852, now seen corresponding path program 1 times [2018-01-24 20:17:31,232 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 20:17:31,232 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:17:31,233 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 20:17:31,233 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:17:31,233 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 20:17:31,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 20:17:31,254 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 20:17:31,437 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 20:17:31,437 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 20:17:31,437 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2018-01-24 20:17:31,437 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 20:17:31,438 INFO L409 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-01-24 20:17:31,438 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-01-24 20:17:31,438 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-01-24 20:17:31,438 INFO L87 Difference]: Start difference. First operand 73 states and 85 transitions. Second operand 7 states. [2018-01-24 20:17:31,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 20:17:31,611 INFO L93 Difference]: Finished difference Result 104 states and 117 transitions. [2018-01-24 20:17:31,611 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-01-24 20:17:31,611 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 23 [2018-01-24 20:17:31,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 20:17:31,612 INFO L225 Difference]: With dead ends: 104 [2018-01-24 20:17:31,612 INFO L226 Difference]: Without dead ends: 77 [2018-01-24 20:17:31,613 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2018-01-24 20:17:31,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-01-24 20:17:31,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 69. [2018-01-24 20:17:31,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-01-24 20:17:31,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 77 transitions. [2018-01-24 20:17:31,620 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 77 transitions. Word has length 23 [2018-01-24 20:17:31,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 20:17:31,620 INFO L432 AbstractCegarLoop]: Abstraction has 69 states and 77 transitions. [2018-01-24 20:17:31,621 INFO L433 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-01-24 20:17:31,621 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 77 transitions. [2018-01-24 20:17:31,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-01-24 20:17:31,621 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 20:17:31,622 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] [2018-01-24 20:17:31,622 INFO L371 AbstractCegarLoop]: === Iteration 9 === [mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr0RequiresViolation, mainErr21RequiresViolation, mainErr3RequiresViolation, mainErr15RequiresViolation, mainErr16RequiresViolation, mainErr2RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr1RequiresViolation, mainErr17RequiresViolation, mainErr9RequiresViolation, mainErr24EnsuresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr11RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr4RequiresViolation, mainErr14RequiresViolation]=== [2018-01-24 20:17:31,622 INFO L82 PathProgramCache]: Analyzing trace with hash -493029770, now seen corresponding path program 1 times [2018-01-24 20:17:31,622 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 20:17:31,623 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:17:31,623 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 20:17:31,623 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:17:31,623 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 20:17:31,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 20:17:31,640 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 20:17:31,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 20:17:31,714 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 20:17:31,714 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-01-24 20:17:31,714 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 20:17:31,714 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-24 20:17:31,714 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-24 20:17:31,714 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-01-24 20:17:31,715 INFO L87 Difference]: Start difference. First operand 69 states and 77 transitions. Second operand 5 states. [2018-01-24 20:17:31,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 20:17:31,793 INFO L93 Difference]: Finished difference Result 108 states and 120 transitions. [2018-01-24 20:17:31,793 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-01-24 20:17:31,793 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2018-01-24 20:17:31,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 20:17:31,794 INFO L225 Difference]: With dead ends: 108 [2018-01-24 20:17:31,794 INFO L226 Difference]: Without dead ends: 107 [2018-01-24 20:17:31,794 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2018-01-24 20:17:31,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2018-01-24 20:17:31,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 68. [2018-01-24 20:17:31,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-01-24 20:17:31,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 76 transitions. [2018-01-24 20:17:31,799 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 76 transitions. Word has length 23 [2018-01-24 20:17:31,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 20:17:31,799 INFO L432 AbstractCegarLoop]: Abstraction has 68 states and 76 transitions. [2018-01-24 20:17:31,799 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-24 20:17:31,799 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 76 transitions. [2018-01-24 20:17:31,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-01-24 20:17:31,800 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 20:17:31,800 INFO L322 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 20:17:31,801 INFO L371 AbstractCegarLoop]: === Iteration 10 === [mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr0RequiresViolation, mainErr21RequiresViolation, mainErr3RequiresViolation, mainErr15RequiresViolation, mainErr16RequiresViolation, mainErr2RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr1RequiresViolation, mainErr17RequiresViolation, mainErr9RequiresViolation, mainErr24EnsuresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr11RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr4RequiresViolation, mainErr14RequiresViolation]=== [2018-01-24 20:17:31,801 INFO L82 PathProgramCache]: Analyzing trace with hash -951533272, now seen corresponding path program 1 times [2018-01-24 20:17:31,801 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 20:17:31,802 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:17:31,802 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 20:17:31,802 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:17:31,802 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 20:17:31,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 20:17:31,814 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 20:17:31,927 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 20:17:31,928 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-24 20:17:31,928 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-24 20:17:31,929 INFO L199 CegarAbsIntRunner]: Running AI on error trace of length 26 with the following transitions: [2018-01-24 20:17:31,931 INFO L201 CegarAbsIntRunner]: [0], [1], [5], [6], [7], [8], [11], [14], [17], [21], [23], [26], [57], [63], [64], [65], [67], [68], [82], [84], [93], [94], [95] [2018-01-24 20:17:31,991 INFO L147 AbstractInterpreter]: Using domain VPDomain [2018-01-24 20:17:31,991 INFO L101 FixpointEngine]: Starting fixpoint engine with domain VPDomain (maxUnwinding=3, maxParallelStates=2) Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown