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_precise.epf -i ../../../trunk/examples/svcomp/array-memsafety/lis_unsafe_false-valid-deref.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-6b94a2f [2018-01-24 23:06:08,275 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-24 23:06:08,297 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-24 23:06:08,313 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-24 23:06:08,313 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-24 23:06:08,314 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-24 23:06:08,316 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-24 23:06:08,317 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-24 23:06:08,319 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-24 23:06:08,320 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-24 23:06:08,321 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-01-24 23:06:08,322 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-01-24 23:06:08,322 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-01-24 23:06:08,324 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-01-24 23:06:08,325 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-01-24 23:06:08,327 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-01-24 23:06:08,330 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-01-24 23:06:08,332 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-01-24 23:06:08,334 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-01-24 23:06:08,335 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-01-24 23:06:08,337 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-01-24 23:06:08,338 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-01-24 23:06:08,338 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-01-24 23:06:08,339 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-01-24 23:06:08,340 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-01-24 23:06:08,342 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-01-24 23:06:08,342 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-01-24 23:06:08,343 INFO L177 SettingsManager]: PEA to Boogie provides no preferences, ignoring... [2018-01-24 23:06:08,343 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-01-24 23:06:08,343 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-01-24 23:06:08,344 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-01-24 23:06:08,344 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_precise.epf [2018-01-24 23:06:08,354 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-24 23:06:08,354 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-24 23:06:08,355 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-24 23:06:08,355 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-24 23:06:08,355 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-24 23:06:08,355 INFO L133 SettingsManager]: * Weq Fattening=true [2018-01-24 23:06:08,355 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-24 23:06:08,356 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-24 23:06:08,356 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-24 23:06:08,356 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-24 23:06:08,357 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-24 23:06:08,357 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-24 23:06:08,357 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-24 23:06:08,357 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-24 23:06:08,357 INFO L133 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2018-01-24 23:06:08,357 INFO L133 SettingsManager]: * Bitprecise bitfields=true [2018-01-24 23:06:08,357 INFO L133 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2018-01-24 23:06:08,358 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-24 23:06:08,358 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-24 23:06:08,358 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-24 23:06:08,358 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-01-24 23:06:08,358 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-24 23:06:08,358 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-24 23:06:08,359 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-24 23:06:08,359 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-24 23:06:08,359 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-24 23:06:08,359 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-24 23:06:08,359 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-24 23:06:08,360 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-24 23:06:08,360 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-01-24 23:06:08,360 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-24 23:06:08,360 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-24 23:06:08,360 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-24 23:06:08,360 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-01-24 23:06:08,361 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-24 23:06:08,361 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-24 23:06:08,393 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-24 23:06:08,404 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-24 23:06:08,408 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-24 23:06:08,409 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-24 23:06:08,409 INFO L276 PluginConnector]: CDTParser initialized [2018-01-24 23:06:08,410 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-memsafety/lis_unsafe_false-valid-deref.i [2018-01-24 23:06:08,566 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-24 23:06:08,570 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-24 23:06:08,571 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-24 23:06:08,571 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-24 23:06:08,576 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-24 23:06:08,577 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.01 11:06:08" (1/1) ... [2018-01-24 23:06:08,580 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a446621 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:06:08, skipping insertion in model container [2018-01-24 23:06:08,580 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.01 11:06:08" (1/1) ... [2018-01-24 23:06:08,593 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-24 23:06:08,631 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-24 23:06:08,753 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-24 23:06:08,775 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-24 23:06:08,784 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:06:08 WrapperNode [2018-01-24 23:06:08,785 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-24 23:06:08,785 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-24 23:06:08,786 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-24 23:06:08,786 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-24 23:06:08,803 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:06:08" (1/1) ... [2018-01-24 23:06:08,803 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:06:08" (1/1) ... [2018-01-24 23:06:08,812 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:06:08" (1/1) ... [2018-01-24 23:06:08,812 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:06:08" (1/1) ... [2018-01-24 23:06:08,817 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:06:08" (1/1) ... [2018-01-24 23:06:08,821 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:06:08" (1/1) ... [2018-01-24 23:06:08,823 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:06:08" (1/1) ... [2018-01-24 23:06:08,825 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-24 23:06:08,826 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-24 23:06:08,826 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-24 23:06:08,826 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-24 23:06:08,827 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:06:08" (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 23:06:08,871 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-24 23:06:08,872 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-24 23:06:08,872 INFO L136 BoogieDeclarations]: Found implementation of procedure lis [2018-01-24 23:06:08,872 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-24 23:06:08,872 INFO L128 BoogieDeclarations]: Found specification of procedure write~int [2018-01-24 23:06:08,872 INFO L128 BoogieDeclarations]: Found specification of procedure read~int [2018-01-24 23:06:08,872 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-01-24 23:06:08,872 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-01-24 23:06:08,873 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-01-24 23:06:08,873 INFO L128 BoogieDeclarations]: Found specification of procedure malloc [2018-01-24 23:06:08,873 INFO L128 BoogieDeclarations]: Found specification of procedure free [2018-01-24 23:06:08,873 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-01-24 23:06:08,873 INFO L128 BoogieDeclarations]: Found specification of procedure lis [2018-01-24 23:06:08,873 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-24 23:06:08,874 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-24 23:06:08,874 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-24 23:06:09,179 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-24 23:06:09,179 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.01 11:06:09 BoogieIcfgContainer [2018-01-24 23:06:09,180 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-24 23:06:09,180 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-01-24 23:06:09,181 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-01-24 23:06:09,183 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-01-24 23:06:09,184 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.01 11:06:08" (1/3) ... [2018-01-24 23:06:09,185 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b85f064 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.01 11:06:09, skipping insertion in model container [2018-01-24 23:06:09,185 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:06:08" (2/3) ... [2018-01-24 23:06:09,185 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b85f064 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.01 11:06:09, skipping insertion in model container [2018-01-24 23:06:09,186 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.01 11:06:09" (3/3) ... [2018-01-24 23:06:09,187 INFO L105 eAbstractionObserver]: Analyzing ICFG lis_unsafe_false-valid-deref.i [2018-01-24 23:06:09,194 INFO L130 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-01-24 23:06:09,202 INFO L142 ceAbstractionStarter]: Appying trace abstraction to program that has 27 error locations. [2018-01-24 23:06:09,240 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-24 23:06:09,240 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-24 23:06:09,240 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-24 23:06:09,241 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-24 23:06:09,241 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-24 23:06:09,241 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-24 23:06:09,241 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-24 23:06:09,241 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-01-24 23:06:09,242 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-24 23:06:09,259 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states. [2018-01-24 23:06:09,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-01-24 23:06:09,265 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 23:06:09,266 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 23:06:09,266 INFO L371 AbstractCegarLoop]: === Iteration 1 === [lisErr19RequiresViolation, lisErr7RequiresViolation, lisErr5RequiresViolation, lisErr0RequiresViolation, lisErr2RequiresViolation, lisErr22RequiresViolation, lisErr12RequiresViolation, lisErr3RequiresViolation, lisErr16RequiresViolation, lisErr10RequiresViolation, lisErr6RequiresViolation, lisErr20RequiresViolation, lisErr18RequiresViolation, lisErr25RequiresViolation, lisErr13RequiresViolation, lisErr23RequiresViolation, lisErr9RequiresViolation, lisErr15RequiresViolation, lisErr8RequiresViolation, lisErr17RequiresViolation, lisErr4RequiresViolation, lisErr21RequiresViolation, lisErr11RequiresViolation, lisErr1RequiresViolation, lisErr14RequiresViolation, lisErr24RequiresViolation, mainErr0EnsuresViolation]=== [2018-01-24 23:06:09,270 INFO L82 PathProgramCache]: Analyzing trace with hash -40654889, now seen corresponding path program 1 times [2018-01-24 23:06:09,272 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 23:06:09,314 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:06:09,315 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 23:06:09,315 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:06:09,315 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 23:06:09,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 23:06:09,376 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 23:06:09,500 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 23:06:09,502 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 23:06:09,502 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-24 23:06:09,502 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 23:06:09,505 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-24 23:06:09,589 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-24 23:06:09,590 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-24 23:06:09,592 INFO L87 Difference]: Start difference. First operand 81 states. Second operand 4 states. [2018-01-24 23:06:09,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 23:06:09,745 INFO L93 Difference]: Finished difference Result 134 states and 159 transitions. [2018-01-24 23:06:09,746 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-01-24 23:06:09,747 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2018-01-24 23:06:09,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 23:06:09,758 INFO L225 Difference]: With dead ends: 134 [2018-01-24 23:06:09,758 INFO L226 Difference]: Without dead ends: 70 [2018-01-24 23:06:09,762 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 23:06:09,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2018-01-24 23:06:09,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2018-01-24 23:06:09,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2018-01-24 23:06:09,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 76 transitions. [2018-01-24 23:06:09,797 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 76 transitions. Word has length 15 [2018-01-24 23:06:09,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 23:06:09,798 INFO L432 AbstractCegarLoop]: Abstraction has 70 states and 76 transitions. [2018-01-24 23:06:09,798 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-24 23:06:09,798 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 76 transitions. [2018-01-24 23:06:09,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-01-24 23:06:09,798 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 23:06:09,798 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 23:06:09,799 INFO L371 AbstractCegarLoop]: === Iteration 2 === [lisErr19RequiresViolation, lisErr7RequiresViolation, lisErr5RequiresViolation, lisErr0RequiresViolation, lisErr2RequiresViolation, lisErr22RequiresViolation, lisErr12RequiresViolation, lisErr3RequiresViolation, lisErr16RequiresViolation, lisErr10RequiresViolation, lisErr6RequiresViolation, lisErr20RequiresViolation, lisErr18RequiresViolation, lisErr25RequiresViolation, lisErr13RequiresViolation, lisErr23RequiresViolation, lisErr9RequiresViolation, lisErr15RequiresViolation, lisErr8RequiresViolation, lisErr17RequiresViolation, lisErr4RequiresViolation, lisErr21RequiresViolation, lisErr11RequiresViolation, lisErr1RequiresViolation, lisErr14RequiresViolation, lisErr24RequiresViolation, mainErr0EnsuresViolation]=== [2018-01-24 23:06:09,799 INFO L82 PathProgramCache]: Analyzing trace with hash -40654888, now seen corresponding path program 1 times [2018-01-24 23:06:09,799 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 23:06:09,800 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:06:09,800 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 23:06:09,800 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:06:09,800 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 23:06:09,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 23:06:09,824 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 23:06:09,946 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 23:06:09,946 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 23:06:09,946 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-01-24 23:06:09,946 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 23:06:09,948 INFO L409 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-01-24 23:06:09,948 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-01-24 23:06:09,949 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-01-24 23:06:09,949 INFO L87 Difference]: Start difference. First operand 70 states and 76 transitions. Second operand 7 states. [2018-01-24 23:06:10,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 23:06:10,233 INFO L93 Difference]: Finished difference Result 95 states and 105 transitions. [2018-01-24 23:06:10,234 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-01-24 23:06:10,234 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 15 [2018-01-24 23:06:10,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 23:06:10,238 INFO L225 Difference]: With dead ends: 95 [2018-01-24 23:06:10,238 INFO L226 Difference]: Without dead ends: 91 [2018-01-24 23:06:10,239 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2018-01-24 23:06:10,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-01-24 23:06:10,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 77. [2018-01-24 23:06:10,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-01-24 23:06:10,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 86 transitions. [2018-01-24 23:06:10,251 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 86 transitions. Word has length 15 [2018-01-24 23:06:10,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 23:06:10,251 INFO L432 AbstractCegarLoop]: Abstraction has 77 states and 86 transitions. [2018-01-24 23:06:10,251 INFO L433 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-01-24 23:06:10,251 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 86 transitions. [2018-01-24 23:06:10,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-01-24 23:06:10,252 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 23:06:10,252 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 23:06:10,252 INFO L371 AbstractCegarLoop]: === Iteration 3 === [lisErr19RequiresViolation, lisErr7RequiresViolation, lisErr5RequiresViolation, lisErr0RequiresViolation, lisErr2RequiresViolation, lisErr22RequiresViolation, lisErr12RequiresViolation, lisErr3RequiresViolation, lisErr16RequiresViolation, lisErr10RequiresViolation, lisErr6RequiresViolation, lisErr20RequiresViolation, lisErr18RequiresViolation, lisErr25RequiresViolation, lisErr13RequiresViolation, lisErr23RequiresViolation, lisErr9RequiresViolation, lisErr15RequiresViolation, lisErr8RequiresViolation, lisErr17RequiresViolation, lisErr4RequiresViolation, lisErr21RequiresViolation, lisErr11RequiresViolation, lisErr1RequiresViolation, lisErr14RequiresViolation, lisErr24RequiresViolation, mainErr0EnsuresViolation]=== [2018-01-24 23:06:10,252 INFO L82 PathProgramCache]: Analyzing trace with hash -1260301570, now seen corresponding path program 1 times [2018-01-24 23:06:10,252 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 23:06:10,253 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:06:10,253 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 23:06:10,253 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:06:10,253 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 23:06:10,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 23:06:10,269 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 23:06:10,303 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 23:06:10,303 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 23:06:10,303 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-24 23:06:10,304 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 23:06:10,304 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-24 23:06:10,304 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-24 23:06:10,304 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-24 23:06:10,305 INFO L87 Difference]: Start difference. First operand 77 states and 86 transitions. Second operand 4 states. [2018-01-24 23:06:10,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 23:06:10,368 INFO L93 Difference]: Finished difference Result 77 states and 86 transitions. [2018-01-24 23:06:10,369 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-01-24 23:06:10,369 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2018-01-24 23:06:10,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 23:06:10,370 INFO L225 Difference]: With dead ends: 77 [2018-01-24 23:06:10,370 INFO L226 Difference]: Without dead ends: 75 [2018-01-24 23:06:10,371 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 23:06:10,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-01-24 23:06:10,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2018-01-24 23:06:10,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-01-24 23:06:10,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 84 transitions. [2018-01-24 23:06:10,380 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 84 transitions. Word has length 16 [2018-01-24 23:06:10,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 23:06:10,380 INFO L432 AbstractCegarLoop]: Abstraction has 75 states and 84 transitions. [2018-01-24 23:06:10,380 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-24 23:06:10,380 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 84 transitions. [2018-01-24 23:06:10,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-01-24 23:06:10,381 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 23:06:10,381 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 23:06:10,381 INFO L371 AbstractCegarLoop]: === Iteration 4 === [lisErr19RequiresViolation, lisErr7RequiresViolation, lisErr5RequiresViolation, lisErr0RequiresViolation, lisErr2RequiresViolation, lisErr22RequiresViolation, lisErr12RequiresViolation, lisErr3RequiresViolation, lisErr16RequiresViolation, lisErr10RequiresViolation, lisErr6RequiresViolation, lisErr20RequiresViolation, lisErr18RequiresViolation, lisErr25RequiresViolation, lisErr13RequiresViolation, lisErr23RequiresViolation, lisErr9RequiresViolation, lisErr15RequiresViolation, lisErr8RequiresViolation, lisErr17RequiresViolation, lisErr4RequiresViolation, lisErr21RequiresViolation, lisErr11RequiresViolation, lisErr1RequiresViolation, lisErr14RequiresViolation, lisErr24RequiresViolation, mainErr0EnsuresViolation]=== [2018-01-24 23:06:10,382 INFO L82 PathProgramCache]: Analyzing trace with hash -1260301569, now seen corresponding path program 1 times [2018-01-24 23:06:10,382 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 23:06:10,383 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:06:10,383 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 23:06:10,383 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:06:10,384 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 23:06:10,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 23:06:10,399 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 23:06:10,494 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 23:06:10,494 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 23:06:10,494 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2018-01-24 23:06:10,494 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 23:06:10,495 INFO L409 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-01-24 23:06:10,495 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-01-24 23:06:10,495 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2018-01-24 23:06:10,495 INFO L87 Difference]: Start difference. First operand 75 states and 84 transitions. Second operand 8 states. [2018-01-24 23:06:10,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 23:06:10,684 INFO L93 Difference]: Finished difference Result 94 states and 106 transitions. [2018-01-24 23:06:10,684 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-01-24 23:06:10,684 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 16 [2018-01-24 23:06:10,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 23:06:10,685 INFO L225 Difference]: With dead ends: 94 [2018-01-24 23:06:10,686 INFO L226 Difference]: Without dead ends: 91 [2018-01-24 23:06:10,686 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2018-01-24 23:06:10,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-01-24 23:06:10,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 72. [2018-01-24 23:06:10,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2018-01-24 23:06:10,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 81 transitions. [2018-01-24 23:06:10,694 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 81 transitions. Word has length 16 [2018-01-24 23:06:10,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 23:06:10,695 INFO L432 AbstractCegarLoop]: Abstraction has 72 states and 81 transitions. [2018-01-24 23:06:10,695 INFO L433 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-01-24 23:06:10,695 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 81 transitions. [2018-01-24 23:06:10,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-01-24 23:06:10,696 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 23:06:10,696 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 23:06:10,696 INFO L371 AbstractCegarLoop]: === Iteration 5 === [lisErr19RequiresViolation, lisErr7RequiresViolation, lisErr5RequiresViolation, lisErr0RequiresViolation, lisErr2RequiresViolation, lisErr22RequiresViolation, lisErr12RequiresViolation, lisErr3RequiresViolation, lisErr16RequiresViolation, lisErr10RequiresViolation, lisErr6RequiresViolation, lisErr20RequiresViolation, lisErr18RequiresViolation, lisErr25RequiresViolation, lisErr13RequiresViolation, lisErr23RequiresViolation, lisErr9RequiresViolation, lisErr15RequiresViolation, lisErr8RequiresViolation, lisErr17RequiresViolation, lisErr4RequiresViolation, lisErr21RequiresViolation, lisErr11RequiresViolation, lisErr1RequiresViolation, lisErr14RequiresViolation, lisErr24RequiresViolation, mainErr0EnsuresViolation]=== [2018-01-24 23:06:10,697 INFO L82 PathProgramCache]: Analyzing trace with hash -1752664061, now seen corresponding path program 1 times [2018-01-24 23:06:10,697 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 23:06:10,698 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:06:10,698 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 23:06:10,698 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:06:10,698 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 23:06:10,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 23:06:10,713 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 23:06:10,756 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 23:06:10,756 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 23:06:10,756 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-24 23:06:10,756 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 23:06:10,757 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-24 23:06:10,757 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-24 23:06:10,757 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-01-24 23:06:10,757 INFO L87 Difference]: Start difference. First operand 72 states and 81 transitions. Second operand 5 states. [2018-01-24 23:06:10,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 23:06:10,874 INFO L93 Difference]: Finished difference Result 141 states and 160 transitions. [2018-01-24 23:06:10,875 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-01-24 23:06:10,875 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2018-01-24 23:06:10,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 23:06:10,876 INFO L225 Difference]: With dead ends: 141 [2018-01-24 23:06:10,876 INFO L226 Difference]: Without dead ends: 91 [2018-01-24 23:06:10,877 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2018-01-24 23:06:10,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-01-24 23:06:10,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 81. [2018-01-24 23:06:10,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-01-24 23:06:10,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 91 transitions. [2018-01-24 23:06:10,888 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 91 transitions. Word has length 20 [2018-01-24 23:06:10,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 23:06:10,888 INFO L432 AbstractCegarLoop]: Abstraction has 81 states and 91 transitions. [2018-01-24 23:06:10,888 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-24 23:06:10,889 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 91 transitions. [2018-01-24 23:06:10,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-01-24 23:06:10,889 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 23:06:10,890 INFO L322 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 23:06:10,890 INFO L371 AbstractCegarLoop]: === Iteration 6 === [lisErr19RequiresViolation, lisErr7RequiresViolation, lisErr5RequiresViolation, lisErr0RequiresViolation, lisErr2RequiresViolation, lisErr22RequiresViolation, lisErr12RequiresViolation, lisErr3RequiresViolation, lisErr16RequiresViolation, lisErr10RequiresViolation, lisErr6RequiresViolation, lisErr20RequiresViolation, lisErr18RequiresViolation, lisErr25RequiresViolation, lisErr13RequiresViolation, lisErr23RequiresViolation, lisErr9RequiresViolation, lisErr15RequiresViolation, lisErr8RequiresViolation, lisErr17RequiresViolation, lisErr4RequiresViolation, lisErr21RequiresViolation, lisErr11RequiresViolation, lisErr1RequiresViolation, lisErr14RequiresViolation, lisErr24RequiresViolation, mainErr0EnsuresViolation]=== [2018-01-24 23:06:10,890 INFO L82 PathProgramCache]: Analyzing trace with hash -304076685, now seen corresponding path program 1 times [2018-01-24 23:06:10,890 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 23:06:10,891 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:06:10,891 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 23:06:10,892 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:06:10,892 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 23:06:10,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 23:06:10,907 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 23:06:11,049 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 23:06:11,049 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-24 23:06:11,049 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-24 23:06:11,050 INFO L199 CegarAbsIntRunner]: Running AI on error trace of length 21 with the following transitions: [2018-01-24 23:06:11,052 INFO L201 CegarAbsIntRunner]: [0], [1], [2], [3], [4], [5], [6], [10], [15], [16], [18], [19], [23], [128], [133], [134], [135], [137] [2018-01-24 23:06:11,100 INFO L147 AbstractInterpreter]: Using domain VPDomain [2018-01-24 23:06:11,101 INFO L101 FixpointEngine]: Starting fixpoint engine with domain VPDomain (maxUnwinding=3, maxParallelStates=2) [2018-01-24 23:06:49,357 INFO L259 AbstractInterpreter]: Some error location(s) were reachable [2018-01-24 23:06:49,358 INFO L268 AbstractInterpreter]: Visited 18 different actions 29 times. Merged at 6 different actions 11 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 28 variables. [2018-01-24 23:06:49,382 INFO L434 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-01-24 23:06:49,382 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-24 23:06:49,382 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 [2018-01-24 23:06:49,394 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 23:06:49,394 INFO L280 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-01-24 23:06:49,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 23:06:49,444 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-24 23:06:49,490 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2018-01-24 23:06:49,491 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-01-24 23:06:49,500 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-01-24 23:06:49,500 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:12, output treesize:11 [2018-01-24 23:06:49,603 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 15 [2018-01-24 23:06:49,604 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-01-24 23:06:49,623 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-01-24 23:06:49,623 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:18 [2018-01-24 23:06:49,720 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 23:06:49,721 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-24 23:06:50,087 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 23:06:50,123 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-24 23:06:50,123 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 [2018-01-24 23:06:50,128 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 23:06:50,128 INFO L280 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-01-24 23:06:50,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 23:06:50,158 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-24 23:06:50,162 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2018-01-24 23:06:50,163 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-01-24 23:06:50,173 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2018-01-24 23:06:50,174 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-01-24 23:06:50,179 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-01-24 23:06:50,180 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:18, output treesize:16 [2018-01-24 23:06:50,202 INFO L700 Elim1Store]: detected not equals via solver [2018-01-24 23:06:50,203 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 19 [2018-01-24 23:06:50,203 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-01-24 23:06:50,215 INFO L700 Elim1Store]: detected not equals via solver [2018-01-24 23:06:50,216 INFO L700 Elim1Store]: detected not equals via solver [2018-01-24 23:06:50,216 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 4 [2018-01-24 23:06:50,217 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-01-24 23:06:50,229 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-01-24 23:06:50,230 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:29, output treesize:22 [2018-01-24 23:06:50,461 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 23:06:50,461 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-24 23:06:50,742 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 23:06:50,744 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-01-24 23:06:50,744 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7] total 22 [2018-01-24 23:06:50,744 INFO L247 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-01-24 23:06:50,744 INFO L409 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-01-24 23:06:50,745 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-01-24 23:06:50,745 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=399, Unknown=0, NotChecked=0, Total=506 [2018-01-24 23:06:50,745 INFO L87 Difference]: Start difference. First operand 81 states and 91 transitions. Second operand 11 states. [2018-01-24 23:06:51,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 23:06:51,271 INFO L93 Difference]: Finished difference Result 91 states and 101 transitions. [2018-01-24 23:06:51,271 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-01-24 23:06:51,271 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 20 [2018-01-24 23:06:51,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 23:06:51,272 INFO L225 Difference]: With dead ends: 91 [2018-01-24 23:06:51,272 INFO L226 Difference]: Without dead ends: 86 [2018-01-24 23:06:51,273 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 58 SyntacticMatches, 6 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=223, Invalid=647, Unknown=0, NotChecked=0, Total=870 [2018-01-24 23:06:51,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2018-01-24 23:06:51,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 70. [2018-01-24 23:06:51,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2018-01-24 23:06:51,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 78 transitions. [2018-01-24 23:06:51,282 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 78 transitions. Word has length 20 [2018-01-24 23:06:51,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 23:06:51,282 INFO L432 AbstractCegarLoop]: Abstraction has 70 states and 78 transitions. [2018-01-24 23:06:51,282 INFO L433 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-01-24 23:06:51,282 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 78 transitions. [2018-01-24 23:06:51,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-01-24 23:06:51,283 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 23:06:51,283 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] [2018-01-24 23:06:51,283 INFO L371 AbstractCegarLoop]: === Iteration 7 === [lisErr19RequiresViolation, lisErr7RequiresViolation, lisErr5RequiresViolation, lisErr0RequiresViolation, lisErr2RequiresViolation, lisErr22RequiresViolation, lisErr12RequiresViolation, lisErr3RequiresViolation, lisErr16RequiresViolation, lisErr10RequiresViolation, lisErr6RequiresViolation, lisErr20RequiresViolation, lisErr18RequiresViolation, lisErr25RequiresViolation, lisErr13RequiresViolation, lisErr23RequiresViolation, lisErr9RequiresViolation, lisErr15RequiresViolation, lisErr8RequiresViolation, lisErr17RequiresViolation, lisErr4RequiresViolation, lisErr21RequiresViolation, lisErr11RequiresViolation, lisErr1RequiresViolation, lisErr14RequiresViolation, lisErr24RequiresViolation, mainErr0EnsuresViolation]=== [2018-01-24 23:06:51,284 INFO L82 PathProgramCache]: Analyzing trace with hash -692554244, now seen corresponding path program 1 times [2018-01-24 23:06:51,284 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 23:06:51,284 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:06:51,285 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 23:06:51,285 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:06:51,285 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 23:06:51,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 23:06:51,294 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 23:06:51,370 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 23:06:51,371 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 23:06:51,371 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-01-24 23:06:51,371 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 23:06:51,371 INFO L409 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-01-24 23:06:51,371 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-01-24 23:06:51,371 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2018-01-24 23:06:51,371 INFO L87 Difference]: Start difference. First operand 70 states and 78 transitions. Second operand 7 states. [2018-01-24 23:06:51,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 23:06:51,487 INFO L93 Difference]: Finished difference Result 70 states and 78 transitions. [2018-01-24 23:06:51,487 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-01-24 23:06:51,488 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2018-01-24 23:06:51,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 23:06:51,488 INFO L225 Difference]: With dead ends: 70 [2018-01-24 23:06:51,488 INFO L226 Difference]: Without dead ends: 69 [2018-01-24 23:06:51,489 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2018-01-24 23:06:51,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-01-24 23:06:51,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2018-01-24 23:06:51,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-01-24 23:06:51,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 77 transitions. [2018-01-24 23:06:51,498 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 77 transitions. Word has length 22 [2018-01-24 23:06:51,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 23:06:51,498 INFO L432 AbstractCegarLoop]: Abstraction has 69 states and 77 transitions. [2018-01-24 23:06:51,498 INFO L433 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-01-24 23:06:51,499 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 77 transitions. [2018-01-24 23:06:51,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-01-24 23:06:51,499 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 23:06:51,500 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] [2018-01-24 23:06:51,500 INFO L371 AbstractCegarLoop]: === Iteration 8 === [lisErr19RequiresViolation, lisErr7RequiresViolation, lisErr5RequiresViolation, lisErr0RequiresViolation, lisErr2RequiresViolation, lisErr22RequiresViolation, lisErr12RequiresViolation, lisErr3RequiresViolation, lisErr16RequiresViolation, lisErr10RequiresViolation, lisErr6RequiresViolation, lisErr20RequiresViolation, lisErr18RequiresViolation, lisErr25RequiresViolation, lisErr13RequiresViolation, lisErr23RequiresViolation, lisErr9RequiresViolation, lisErr15RequiresViolation, lisErr8RequiresViolation, lisErr17RequiresViolation, lisErr4RequiresViolation, lisErr21RequiresViolation, lisErr11RequiresViolation, lisErr1RequiresViolation, lisErr14RequiresViolation, lisErr24RequiresViolation, mainErr0EnsuresViolation]=== [2018-01-24 23:06:51,500 INFO L82 PathProgramCache]: Analyzing trace with hash 1804279880, now seen corresponding path program 1 times [2018-01-24 23:06:51,500 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 23:06:51,501 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:06:51,501 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 23:06:51,501 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:06:51,501 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 23:06:51,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 23:06:51,518 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 23:06:51,614 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 23:06:51,614 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-24 23:06:51,614 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-24 23:06:51,614 INFO L199 CegarAbsIntRunner]: Running AI on error trace of length 26 with the following transitions: [2018-01-24 23:06:51,614 INFO L201 CegarAbsIntRunner]: [0], [1], [2], [3], [4], [5], [6], [10], [13], [15], [16], [19], [23], [27], [31], [36], [40], [45], [48], [128], [133], [134], [135], [137] [2018-01-24 23:06:51,616 INFO L147 AbstractInterpreter]: Using domain VPDomain [2018-01-24 23:06:51,616 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