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/list-properties/simple_true-unreach-call_false-valid-memtrack.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-6b94a2f [2018-01-25 00:16:45,698 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-25 00:16:45,700 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-25 00:16:45,713 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-25 00:16:45,713 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-25 00:16:45,714 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-25 00:16:45,715 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-25 00:16:45,717 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-25 00:16:45,719 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-25 00:16:45,719 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-25 00:16:45,720 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-01-25 00:16:45,720 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-01-25 00:16:45,721 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-01-25 00:16:45,722 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-01-25 00:16:45,723 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-01-25 00:16:45,725 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-01-25 00:16:45,727 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-01-25 00:16:45,729 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-01-25 00:16:45,730 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-01-25 00:16:45,732 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-01-25 00:16:45,734 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-01-25 00:16:45,734 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-01-25 00:16:45,735 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-01-25 00:16:45,736 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-01-25 00:16:45,736 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-01-25 00:16:45,738 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-01-25 00:16:45,738 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-01-25 00:16:45,739 INFO L177 SettingsManager]: PEA to Boogie provides no preferences, ignoring... [2018-01-25 00:16:45,739 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-01-25 00:16:45,739 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-01-25 00:16:45,740 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-01-25 00:16:45,740 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 [2018-01-25 00:16:45,750 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-25 00:16:45,750 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-25 00:16:45,751 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-25 00:16:45,751 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-25 00:16:45,751 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-25 00:16:45,752 INFO L133 SettingsManager]: * Weq Fattening=true [2018-01-25 00:16:45,752 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-25 00:16:45,752 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-25 00:16:45,753 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-25 00:16:45,753 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-25 00:16:45,753 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-25 00:16:45,753 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-25 00:16:45,753 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-25 00:16:45,754 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-25 00:16:45,754 INFO L133 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2018-01-25 00:16:45,754 INFO L133 SettingsManager]: * Bitprecise bitfields=true [2018-01-25 00:16:45,754 INFO L133 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2018-01-25 00:16:45,754 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-25 00:16:45,755 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-25 00:16:45,755 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-25 00:16:45,755 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-01-25 00:16:45,755 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-25 00:16:45,755 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-25 00:16:45,756 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-25 00:16:45,756 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-25 00:16:45,756 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-25 00:16:45,756 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-25 00:16:45,757 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-25 00:16:45,757 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-25 00:16:45,757 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-01-25 00:16:45,757 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-25 00:16:45,757 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-25 00:16:45,757 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-25 00:16:45,758 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-01-25 00:16:45,759 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-25 00:16:45,759 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-25 00:16:45,793 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-25 00:16:45,806 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-25 00:16:45,811 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-25 00:16:45,813 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-25 00:16:45,813 INFO L276 PluginConnector]: CDTParser initialized [2018-01-25 00:16:45,814 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-properties/simple_true-unreach-call_false-valid-memtrack.i [2018-01-25 00:16:45,995 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-25 00:16:46,002 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-25 00:16:46,003 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-25 00:16:46,003 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-25 00:16:46,010 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-25 00:16:46,012 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.01 12:16:45" (1/1) ... [2018-01-25 00:16:46,015 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1fee6ace and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.01 12:16:46, skipping insertion in model container [2018-01-25 00:16:46,015 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.01 12:16:45" (1/1) ... [2018-01-25 00:16:46,034 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-25 00:16:46,073 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-25 00:16:46,196 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-25 00:16:46,218 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-25 00:16:46,225 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.01 12:16:46 WrapperNode [2018-01-25 00:16:46,225 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-25 00:16:46,226 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-25 00:16:46,226 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-25 00:16:46,226 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-25 00:16:46,239 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.01 12:16:46" (1/1) ... [2018-01-25 00:16:46,239 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.01 12:16:46" (1/1) ... [2018-01-25 00:16:46,247 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.01 12:16:46" (1/1) ... [2018-01-25 00:16:46,247 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.01 12:16:46" (1/1) ... [2018-01-25 00:16:46,251 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.01 12:16:46" (1/1) ... [2018-01-25 00:16:46,254 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.01 12:16:46" (1/1) ... [2018-01-25 00:16:46,255 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.01 12:16:46" (1/1) ... [2018-01-25 00:16:46,257 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-25 00:16:46,257 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-25 00:16:46,257 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-25 00:16:46,257 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-25 00:16:46,258 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.01 12:16:46" (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 [2018-01-25 00:16:46,302 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-25 00:16:46,302 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-25 00:16:46,302 INFO L136 BoogieDeclarations]: Found implementation of procedure exit [2018-01-25 00:16:46,302 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-25 00:16:46,302 INFO L128 BoogieDeclarations]: Found specification of procedure write~int [2018-01-25 00:16:46,303 INFO L128 BoogieDeclarations]: Found specification of procedure read~int [2018-01-25 00:16:46,303 INFO L128 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2018-01-25 00:16:46,303 INFO L128 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2018-01-25 00:16:46,303 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-01-25 00:16:46,303 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-01-25 00:16:46,303 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-01-25 00:16:46,303 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2018-01-25 00:16:46,303 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-01-25 00:16:46,303 INFO L128 BoogieDeclarations]: Found specification of procedure malloc [2018-01-25 00:16:46,303 INFO L128 BoogieDeclarations]: Found specification of procedure exit [2018-01-25 00:16:46,304 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-25 00:16:46,304 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-25 00:16:46,304 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-25 00:16:46,522 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-25 00:16:46,523 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.01 12:16:46 BoogieIcfgContainer [2018-01-25 00:16:46,523 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-25 00:16:46,523 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-01-25 00:16:46,523 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-01-25 00:16:46,525 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-01-25 00:16:46,525 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.01 12:16:45" (1/3) ... [2018-01-25 00:16:46,526 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d6856b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.01 12:16:46, skipping insertion in model container [2018-01-25 00:16:46,526 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.01 12:16:46" (2/3) ... [2018-01-25 00:16:46,527 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d6856b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.01 12:16:46, skipping insertion in model container [2018-01-25 00:16:46,527 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.01 12:16:46" (3/3) ... [2018-01-25 00:16:46,529 INFO L105 eAbstractionObserver]: Analyzing ICFG simple_true-unreach-call_false-valid-memtrack.i [2018-01-25 00:16:46,536 INFO L130 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-01-25 00:16:46,542 INFO L142 ceAbstractionStarter]: Appying trace abstraction to program that has 15 error locations. [2018-01-25 00:16:46,590 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-25 00:16:46,590 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-25 00:16:46,590 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-25 00:16:46,590 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-25 00:16:46,590 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-25 00:16:46,591 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-25 00:16:46,591 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-25 00:16:46,591 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-01-25 00:16:46,592 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-25 00:16:46,613 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states. [2018-01-25 00:16:46,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-01-25 00:16:46,619 INFO L314 BasicCegarLoop]: Found error trace [2018-01-25 00:16:46,620 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-25 00:16:46,621 INFO L371 AbstractCegarLoop]: === Iteration 1 === [mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr1RequiresViolation, mainErr9RequiresViolation, mainErr0RequiresViolation, mainErr3RequiresViolation, mainErr7RequiresViolation, mainErr11RequiresViolation, mainErr14EnsuresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation]=== [2018-01-25 00:16:46,626 INFO L82 PathProgramCache]: Analyzing trace with hash 33713669, now seen corresponding path program 1 times [2018-01-25 00:16:46,628 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-25 00:16:46,674 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 00:16:46,675 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-25 00:16:46,675 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 00:16:46,675 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-25 00:16:46,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-25 00:16:46,726 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-25 00:16:46,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-25 00:16:46,758 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-25 00:16:46,758 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-25 00:16:46,758 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-25 00:16:46,760 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-25 00:16:46,771 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-25 00:16:46,771 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-25 00:16:46,773 INFO L87 Difference]: Start difference. First operand 53 states. Second operand 2 states. [2018-01-25 00:16:46,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-25 00:16:46,796 INFO L93 Difference]: Finished difference Result 77 states and 84 transitions. [2018-01-25 00:16:46,796 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-25 00:16:46,797 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2018-01-25 00:16:46,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-25 00:16:46,804 INFO L225 Difference]: With dead ends: 77 [2018-01-25 00:16:46,804 INFO L226 Difference]: Without dead ends: 45 [2018-01-25 00:16:46,808 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-25 00:16:46,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-01-25 00:16:46,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-01-25 00:16:46,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-01-25 00:16:46,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2018-01-25 00:16:46,918 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 11 [2018-01-25 00:16:46,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-25 00:16:46,919 INFO L432 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2018-01-25 00:16:46,919 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-25 00:16:46,919 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2018-01-25 00:16:46,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-01-25 00:16:46,920 INFO L314 BasicCegarLoop]: Found error trace [2018-01-25 00:16:46,920 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-25 00:16:46,920 INFO L371 AbstractCegarLoop]: === Iteration 2 === [mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr1RequiresViolation, mainErr9RequiresViolation, mainErr0RequiresViolation, mainErr3RequiresViolation, mainErr7RequiresViolation, mainErr11RequiresViolation, mainErr14EnsuresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation]=== [2018-01-25 00:16:46,921 INFO L82 PathProgramCache]: Analyzing trace with hash -1961763874, now seen corresponding path program 1 times [2018-01-25 00:16:46,921 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-25 00:16:46,922 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 00:16:46,922 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-25 00:16:46,923 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 00:16:46,923 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-25 00:16:46,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-25 00:16:46,941 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-25 00:16:47,038 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-25 00:16:47,038 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-25 00:16:47,038 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-01-25 00:16:47,038 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-25 00:16:47,039 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-25 00:16:47,040 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-25 00:16:47,040 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-01-25 00:16:47,040 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 5 states. [2018-01-25 00:16:47,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-25 00:16:47,216 INFO L93 Difference]: Finished difference Result 62 states and 64 transitions. [2018-01-25 00:16:47,216 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-25 00:16:47,216 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2018-01-25 00:16:47,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-25 00:16:47,218 INFO L225 Difference]: With dead ends: 62 [2018-01-25 00:16:47,218 INFO L226 Difference]: Without dead ends: 55 [2018-01-25 00:16:47,219 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-01-25 00:16:47,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-01-25 00:16:47,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 49. [2018-01-25 00:16:47,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-01-25 00:16:47,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 55 transitions. [2018-01-25 00:16:47,227 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 55 transitions. Word has length 13 [2018-01-25 00:16:47,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-25 00:16:47,227 INFO L432 AbstractCegarLoop]: Abstraction has 49 states and 55 transitions. [2018-01-25 00:16:47,227 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-25 00:16:47,228 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 55 transitions. [2018-01-25 00:16:47,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-01-25 00:16:47,228 INFO L314 BasicCegarLoop]: Found error trace [2018-01-25 00:16:47,228 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-25 00:16:47,228 INFO L371 AbstractCegarLoop]: === Iteration 3 === [mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr1RequiresViolation, mainErr9RequiresViolation, mainErr0RequiresViolation, mainErr3RequiresViolation, mainErr7RequiresViolation, mainErr11RequiresViolation, mainErr14EnsuresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation]=== [2018-01-25 00:16:47,229 INFO L82 PathProgramCache]: Analyzing trace with hash -1961763873, now seen corresponding path program 1 times [2018-01-25 00:16:47,229 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-25 00:16:47,230 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 00:16:47,230 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-25 00:16:47,230 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 00:16:47,231 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-25 00:16:47,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-25 00:16:47,247 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-25 00:16:47,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-25 00:16:47,326 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-25 00:16:47,326 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-01-25 00:16:47,326 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-25 00:16:47,327 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-25 00:16:47,327 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-25 00:16:47,327 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-01-25 00:16:47,327 INFO L87 Difference]: Start difference. First operand 49 states and 55 transitions. Second operand 5 states. [2018-01-25 00:16:47,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-25 00:16:47,477 INFO L93 Difference]: Finished difference Result 70 states and 72 transitions. [2018-01-25 00:16:47,478 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-25 00:16:47,478 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2018-01-25 00:16:47,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-25 00:16:47,479 INFO L225 Difference]: With dead ends: 70 [2018-01-25 00:16:47,479 INFO L226 Difference]: Without dead ends: 63 [2018-01-25 00:16:47,480 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-01-25 00:16:47,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-01-25 00:16:47,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 57. [2018-01-25 00:16:47,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-01-25 00:16:47,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 60 transitions. [2018-01-25 00:16:47,489 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 60 transitions. Word has length 13 [2018-01-25 00:16:47,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-25 00:16:47,490 INFO L432 AbstractCegarLoop]: Abstraction has 57 states and 60 transitions. [2018-01-25 00:16:47,490 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-25 00:16:47,490 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 60 transitions. [2018-01-25 00:16:47,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-01-25 00:16:47,491 INFO L314 BasicCegarLoop]: Found error trace [2018-01-25 00:16:47,491 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-25 00:16:47,491 INFO L371 AbstractCegarLoop]: === Iteration 4 === [mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr1RequiresViolation, mainErr9RequiresViolation, mainErr0RequiresViolation, mainErr3RequiresViolation, mainErr7RequiresViolation, mainErr11RequiresViolation, mainErr14EnsuresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation]=== [2018-01-25 00:16:47,491 INFO L82 PathProgramCache]: Analyzing trace with hash 722281926, now seen corresponding path program 1 times [2018-01-25 00:16:47,491 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-25 00:16:47,492 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 00:16:47,493 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-25 00:16:47,493 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 00:16:47,493 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-25 00:16:47,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-25 00:16:47,506 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-25 00:16:47,534 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-25 00:16:47,534 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-25 00:16:47,534 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-25 00:16:47,535 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-25 00:16:47,535 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-25 00:16:47,535 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-25 00:16:47,535 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-01-25 00:16:47,536 INFO L87 Difference]: Start difference. First operand 57 states and 60 transitions. Second operand 5 states. [2018-01-25 00:16:47,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-25 00:16:47,612 INFO L93 Difference]: Finished difference Result 63 states and 65 transitions. [2018-01-25 00:16:47,612 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-25 00:16:47,612 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2018-01-25 00:16:47,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-25 00:16:47,613 INFO L225 Difference]: With dead ends: 63 [2018-01-25 00:16:47,613 INFO L226 Difference]: Without dead ends: 60 [2018-01-25 00:16:47,613 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-01-25 00:16:47,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-01-25 00:16:47,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 57. [2018-01-25 00:16:47,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-01-25 00:16:47,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 59 transitions. [2018-01-25 00:16:47,619 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 59 transitions. Word has length 19 [2018-01-25 00:16:47,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-25 00:16:47,619 INFO L432 AbstractCegarLoop]: Abstraction has 57 states and 59 transitions. [2018-01-25 00:16:47,619 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-25 00:16:47,619 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 59 transitions. [2018-01-25 00:16:47,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-01-25 00:16:47,620 INFO L314 BasicCegarLoop]: Found error trace [2018-01-25 00:16:47,620 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] [2018-01-25 00:16:47,620 INFO L371 AbstractCegarLoop]: === Iteration 5 === [mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr1RequiresViolation, mainErr9RequiresViolation, mainErr0RequiresViolation, mainErr3RequiresViolation, mainErr7RequiresViolation, mainErr11RequiresViolation, mainErr14EnsuresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation]=== [2018-01-25 00:16:47,621 INFO L82 PathProgramCache]: Analyzing trace with hash 587467943, now seen corresponding path program 1 times [2018-01-25 00:16:47,621 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-25 00:16:47,622 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 00:16:47,622 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-25 00:16:47,622 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 00:16:47,622 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-25 00:16:47,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-25 00:16:47,639 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-25 00:16:47,702 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-25 00:16:47,703 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-25 00:16:47,703 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-01-25 00:16:47,703 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-25 00:16:47,703 INFO L409 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-01-25 00:16:47,704 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-01-25 00:16:47,704 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-01-25 00:16:47,704 INFO L87 Difference]: Start difference. First operand 57 states and 59 transitions. Second operand 7 states. [2018-01-25 00:16:47,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-25 00:16:47,962 INFO L93 Difference]: Finished difference Result 75 states and 77 transitions. [2018-01-25 00:16:47,964 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-01-25 00:16:47,964 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 23 [2018-01-25 00:16:47,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-25 00:16:47,965 INFO L225 Difference]: With dead ends: 75 [2018-01-25 00:16:47,965 INFO L226 Difference]: Without dead ends: 73 [2018-01-25 00:16:47,966 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2018-01-25 00:16:47,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-01-25 00:16:47,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 55. [2018-01-25 00:16:47,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-01-25 00:16:47,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 57 transitions. [2018-01-25 00:16:47,973 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 57 transitions. Word has length 23 [2018-01-25 00:16:47,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-25 00:16:47,974 INFO L432 AbstractCegarLoop]: Abstraction has 55 states and 57 transitions. [2018-01-25 00:16:47,974 INFO L433 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-01-25 00:16:47,974 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 57 transitions. [2018-01-25 00:16:47,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-01-25 00:16:47,975 INFO L314 BasicCegarLoop]: Found error trace [2018-01-25 00:16:47,975 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] [2018-01-25 00:16:47,975 INFO L371 AbstractCegarLoop]: === Iteration 6 === [mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr1RequiresViolation, mainErr9RequiresViolation, mainErr0RequiresViolation, mainErr3RequiresViolation, mainErr7RequiresViolation, mainErr11RequiresViolation, mainErr14EnsuresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation]=== [2018-01-25 00:16:47,976 INFO L82 PathProgramCache]: Analyzing trace with hash 587467944, now seen corresponding path program 1 times [2018-01-25 00:16:47,976 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-25 00:16:47,977 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 00:16:47,977 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-25 00:16:47,977 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 00:16:47,977 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-25 00:16:47,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-25 00:16:47,994 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-25 00:16:48,076 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-25 00:16:48,076 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-25 00:16:48,076 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-01-25 00:16:48,077 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-25 00:16:48,077 INFO L409 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-01-25 00:16:48,077 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-01-25 00:16:48,077 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-01-25 00:16:48,078 INFO L87 Difference]: Start difference. First operand 55 states and 57 transitions. Second operand 7 states. [2018-01-25 00:16:48,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-25 00:16:48,328 INFO L93 Difference]: Finished difference Result 74 states and 76 transitions. [2018-01-25 00:16:48,328 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-01-25 00:16:48,328 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 23 [2018-01-25 00:16:48,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-25 00:16:48,329 INFO L225 Difference]: With dead ends: 74 [2018-01-25 00:16:48,329 INFO L226 Difference]: Without dead ends: 69 [2018-01-25 00:16:48,330 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2018-01-25 00:16:48,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-01-25 00:16:48,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 39. [2018-01-25 00:16:48,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-01-25 00:16:48,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2018-01-25 00:16:48,335 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 23 [2018-01-25 00:16:48,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-25 00:16:48,335 INFO L432 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2018-01-25 00:16:48,336 INFO L433 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-01-25 00:16:48,336 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2018-01-25 00:16:48,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-01-25 00:16:48,336 INFO L314 BasicCegarLoop]: Found error trace [2018-01-25 00:16:48,337 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] [2018-01-25 00:16:48,337 INFO L371 AbstractCegarLoop]: === Iteration 7 === [mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr1RequiresViolation, mainErr9RequiresViolation, mainErr0RequiresViolation, mainErr3RequiresViolation, mainErr7RequiresViolation, mainErr11RequiresViolation, mainErr14EnsuresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation]=== [2018-01-25 00:16:48,337 INFO L82 PathProgramCache]: Analyzing trace with hash 857300197, now seen corresponding path program 1 times [2018-01-25 00:16:48,337 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-25 00:16:48,338 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 00:16:48,338 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-25 00:16:48,338 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 00:16:48,338 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-25 00:16:48,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-25 00:16:48,349 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-25 00:16:48,514 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-25 00:16:48,515 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-25 00:16:48,515 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-25 00:16:48,516 INFO L199 CegarAbsIntRunner]: Running AI on error trace of length 25 with the following transitions: [2018-01-25 00:16:48,518 INFO L201 CegarAbsIntRunner]: [0], [1], [7], [9], [13], [15], [18], [43], [46], [49], [53], [59], [60], [61], [69], [71], [74], [85], [86], [94], [95], [96] [2018-01-25 00:16:48,560 INFO L147 AbstractInterpreter]: Using domain VPDomain [2018-01-25 00:16:48,560 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