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.epf -i ../../../trunk/examples/svcomp/forester-heap/dll-queue_true-unreach-call_true-valid-memsafety.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-6b94a2f [2018-01-24 16:08:48,781 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-24 16:08:48,784 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-24 16:08:48,800 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-24 16:08:48,800 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-24 16:08:48,801 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-24 16:08:48,803 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-24 16:08:48,804 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-24 16:08:48,806 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-24 16:08:48,807 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-24 16:08:48,808 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-01-24 16:08:48,809 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-01-24 16:08:48,810 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-01-24 16:08:48,811 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-01-24 16:08:48,812 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-01-24 16:08:48,815 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-01-24 16:08:48,817 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-01-24 16:08:48,819 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-01-24 16:08:48,821 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-01-24 16:08:48,823 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-01-24 16:08:48,825 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-01-24 16:08:48,826 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-01-24 16:08:48,826 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-01-24 16:08:48,827 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-01-24 16:08:48,828 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-01-24 16:08:48,830 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-01-24 16:08:48,830 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-01-24 16:08:48,831 INFO L177 SettingsManager]: PEA to Boogie provides no preferences, ignoring... [2018-01-24 16:08:48,831 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-01-24 16:08:48,831 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-01-24 16:08:48,832 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-01-24 16:08:48,832 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.epf [2018-01-24 16:08:48,840 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-24 16:08:48,841 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-24 16:08:48,841 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-24 16:08:48,842 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-24 16:08:48,842 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-24 16:08:48,842 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-24 16:08:48,842 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-24 16:08:48,842 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-24 16:08:48,843 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-24 16:08:48,843 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-24 16:08:48,843 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-24 16:08:48,843 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-24 16:08:48,843 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-24 16:08:48,843 INFO L133 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2018-01-24 16:08:48,843 INFO L133 SettingsManager]: * Bitprecise bitfields=true [2018-01-24 16:08:48,844 INFO L133 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2018-01-24 16:08:48,844 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-24 16:08:48,844 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-24 16:08:48,844 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-24 16:08:48,844 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-01-24 16:08:48,844 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-24 16:08:48,844 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-24 16:08:48,845 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-24 16:08:48,845 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-24 16:08:48,845 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-24 16:08:48,845 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-24 16:08:48,845 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-24 16:08:48,846 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-24 16:08:48,846 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-01-24 16:08:48,846 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-24 16:08:48,846 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-24 16:08:48,846 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-24 16:08:48,846 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-01-24 16:08:48,847 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-24 16:08:48,847 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-24 16:08:48,881 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-24 16:08:48,894 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-24 16:08:48,898 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-24 16:08:48,899 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-24 16:08:48,899 INFO L276 PluginConnector]: CDTParser initialized [2018-01-24 16:08:48,900 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/forester-heap/dll-queue_true-unreach-call_true-valid-memsafety.i [2018-01-24 16:08:49,072 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-24 16:08:49,077 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-24 16:08:49,078 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-24 16:08:49,078 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-24 16:08:49,083 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-24 16:08:49,084 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.01 04:08:49" (1/1) ... [2018-01-24 16:08:49,086 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@321f72c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 04:08:49, skipping insertion in model container [2018-01-24 16:08:49,086 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.01 04:08:49" (1/1) ... [2018-01-24 16:08:49,100 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-24 16:08:49,141 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-24 16:08:49,271 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-24 16:08:49,295 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-24 16:08:49,307 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 04:08:49 WrapperNode [2018-01-24 16:08:49,307 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-24 16:08:49,308 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-24 16:08:49,308 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-24 16:08:49,308 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-24 16:08:49,323 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 04:08:49" (1/1) ... [2018-01-24 16:08:49,323 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 04:08:49" (1/1) ... [2018-01-24 16:08:49,337 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 04:08:49" (1/1) ... [2018-01-24 16:08:49,338 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 04:08:49" (1/1) ... [2018-01-24 16:08:49,345 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 04:08:49" (1/1) ... [2018-01-24 16:08:49,350 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 04:08:49" (1/1) ... [2018-01-24 16:08:49,352 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 04:08:49" (1/1) ... [2018-01-24 16:08:49,355 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-24 16:08:49,355 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-24 16:08:49,355 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-24 16:08:49,355 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-24 16:08:49,357 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 04:08:49" (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 16:08:49,407 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-24 16:08:49,407 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-24 16:08:49,407 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-24 16:08:49,407 INFO L128 BoogieDeclarations]: Found specification of procedure write~int [2018-01-24 16:08:49,407 INFO L128 BoogieDeclarations]: Found specification of procedure read~int [2018-01-24 16:08:49,407 INFO L128 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2018-01-24 16:08:49,408 INFO L128 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2018-01-24 16:08:49,408 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-01-24 16:08:49,408 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-01-24 16:08:49,408 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-01-24 16:08:49,408 INFO L128 BoogieDeclarations]: Found specification of procedure malloc [2018-01-24 16:08:49,408 INFO L128 BoogieDeclarations]: Found specification of procedure free [2018-01-24 16:08:49,409 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-01-24 16:08:49,409 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2018-01-24 16:08:49,409 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-24 16:08:49,409 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-24 16:08:49,409 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-24 16:08:50,012 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-24 16:08:50,013 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.01 04:08:50 BoogieIcfgContainer [2018-01-24 16:08:50,013 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-24 16:08:50,014 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-01-24 16:08:50,014 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-01-24 16:08:50,016 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-01-24 16:08:50,017 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.01 04:08:49" (1/3) ... [2018-01-24 16:08:50,018 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d3273ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.01 04:08:50, skipping insertion in model container [2018-01-24 16:08:50,018 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 04:08:49" (2/3) ... [2018-01-24 16:08:50,019 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d3273ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.01 04:08:50, skipping insertion in model container [2018-01-24 16:08:50,019 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.01 04:08:50" (3/3) ... [2018-01-24 16:08:50,020 INFO L105 eAbstractionObserver]: Analyzing ICFG dll-queue_true-unreach-call_true-valid-memsafety.i [2018-01-24 16:08:50,027 INFO L130 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-01-24 16:08:50,036 INFO L142 ceAbstractionStarter]: Appying trace abstraction to program that has 61 error locations. [2018-01-24 16:08:50,078 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-24 16:08:50,078 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-24 16:08:50,078 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-24 16:08:50,078 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-24 16:08:50,079 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-24 16:08:50,079 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-24 16:08:50,079 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-24 16:08:50,079 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-01-24 16:08:50,080 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-24 16:08:50,100 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states. [2018-01-24 16:08:50,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-01-24 16:08:50,105 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 16:08:50,106 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 16:08:50,106 INFO L371 AbstractCegarLoop]: === Iteration 1 === [mainErr51RequiresViolation, mainErr26RequiresViolation, mainErr54RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr58RequiresViolation, mainErr15RequiresViolation, mainErr49RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr35RequiresViolation, mainErr55RequiresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr57RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr50RequiresViolation, mainErr37RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr59RequiresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr56RequiresViolation, mainErr48RequiresViolation, mainErr39RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr52RequiresViolation, mainErr45RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr60EnsuresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr9RequiresViolation, mainErr53RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr47RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 16:08:50,110 INFO L82 PathProgramCache]: Analyzing trace with hash 1694878026, now seen corresponding path program 1 times [2018-01-24 16:08:50,112 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 16:08:50,154 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 16:08:50,155 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 16:08:50,155 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 16:08:50,155 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 16:08:50,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 16:08:50,213 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 16:08:50,279 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 16:08:50,281 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 16:08:50,282 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-24 16:08:50,282 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 16:08:50,284 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-24 16:08:50,382 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-24 16:08:50,383 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-24 16:08:50,386 INFO L87 Difference]: Start difference. First operand 172 states. Second operand 4 states. [2018-01-24 16:08:50,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 16:08:50,622 INFO L93 Difference]: Finished difference Result 331 states and 452 transitions. [2018-01-24 16:08:50,623 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-24 16:08:50,624 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2018-01-24 16:08:50,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 16:08:50,638 INFO L225 Difference]: With dead ends: 331 [2018-01-24 16:08:50,638 INFO L226 Difference]: Without dead ends: 169 [2018-01-24 16:08:50,643 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 16:08:50,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2018-01-24 16:08:50,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 161. [2018-01-24 16:08:50,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2018-01-24 16:08:50,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 173 transitions. [2018-01-24 16:08:50,690 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 173 transitions. Word has length 8 [2018-01-24 16:08:50,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 16:08:50,690 INFO L432 AbstractCegarLoop]: Abstraction has 161 states and 173 transitions. [2018-01-24 16:08:50,690 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-24 16:08:50,690 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 173 transitions. [2018-01-24 16:08:50,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-01-24 16:08:50,691 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 16:08:50,691 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 16:08:50,691 INFO L371 AbstractCegarLoop]: === Iteration 2 === [mainErr51RequiresViolation, mainErr26RequiresViolation, mainErr54RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr58RequiresViolation, mainErr15RequiresViolation, mainErr49RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr35RequiresViolation, mainErr55RequiresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr57RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr50RequiresViolation, mainErr37RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr59RequiresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr56RequiresViolation, mainErr48RequiresViolation, mainErr39RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr52RequiresViolation, mainErr45RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr60EnsuresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr9RequiresViolation, mainErr53RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr47RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 16:08:50,691 INFO L82 PathProgramCache]: Analyzing trace with hash 1694878027, now seen corresponding path program 1 times [2018-01-24 16:08:50,692 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 16:08:50,692 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 16:08:50,693 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 16:08:50,693 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 16:08:50,693 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 16:08:50,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 16:08:50,710 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 16:08:50,792 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 16:08:50,792 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 16:08:50,792 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-24 16:08:50,793 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 16:08:50,794 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-24 16:08:50,795 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-24 16:08:50,795 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-24 16:08:50,795 INFO L87 Difference]: Start difference. First operand 161 states and 173 transitions. Second operand 4 states. [2018-01-24 16:08:51,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 16:08:51,052 INFO L93 Difference]: Finished difference Result 166 states and 176 transitions. [2018-01-24 16:08:51,053 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-01-24 16:08:51,053 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2018-01-24 16:08:51,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 16:08:51,054 INFO L225 Difference]: With dead ends: 166 [2018-01-24 16:08:51,054 INFO L226 Difference]: Without dead ends: 154 [2018-01-24 16:08:51,055 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 16:08:51,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2018-01-24 16:08:51,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 150. [2018-01-24 16:08:51,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2018-01-24 16:08:51,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 161 transitions. [2018-01-24 16:08:51,064 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 161 transitions. Word has length 8 [2018-01-24 16:08:51,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 16:08:51,064 INFO L432 AbstractCegarLoop]: Abstraction has 150 states and 161 transitions. [2018-01-24 16:08:51,064 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-24 16:08:51,065 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 161 transitions. [2018-01-24 16:08:51,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-01-24 16:08:51,065 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 16:08:51,065 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 16:08:51,065 INFO L371 AbstractCegarLoop]: === Iteration 3 === [mainErr51RequiresViolation, mainErr26RequiresViolation, mainErr54RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr58RequiresViolation, mainErr15RequiresViolation, mainErr49RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr35RequiresViolation, mainErr55RequiresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr57RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr50RequiresViolation, mainErr37RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr59RequiresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr56RequiresViolation, mainErr48RequiresViolation, mainErr39RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr52RequiresViolation, mainErr45RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr60EnsuresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr9RequiresViolation, mainErr53RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr47RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 16:08:51,065 INFO L82 PathProgramCache]: Analyzing trace with hash 1424550359, now seen corresponding path program 1 times [2018-01-24 16:08:51,065 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 16:08:51,066 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 16:08:51,066 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 16:08:51,066 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 16:08:51,067 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 16:08:51,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 16:08:51,092 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 16:08:51,155 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 16:08:51,155 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 16:08:51,156 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-24 16:08:51,156 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 16:08:51,156 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-24 16:08:51,156 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-24 16:08:51,156 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-24 16:08:51,156 INFO L87 Difference]: Start difference. First operand 150 states and 161 transitions. Second operand 4 states. [2018-01-24 16:08:51,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 16:08:51,270 INFO L93 Difference]: Finished difference Result 162 states and 172 transitions. [2018-01-24 16:08:51,270 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-24 16:08:51,271 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2018-01-24 16:08:51,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 16:08:51,272 INFO L225 Difference]: With dead ends: 162 [2018-01-24 16:08:51,272 INFO L226 Difference]: Without dead ends: 154 [2018-01-24 16:08:51,273 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 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 16:08:51,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2018-01-24 16:08:51,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 149. [2018-01-24 16:08:51,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2018-01-24 16:08:51,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 162 transitions. [2018-01-24 16:08:51,283 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 162 transitions. Word has length 16 [2018-01-24 16:08:51,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 16:08:51,283 INFO L432 AbstractCegarLoop]: Abstraction has 149 states and 162 transitions. [2018-01-24 16:08:51,283 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-24 16:08:51,283 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 162 transitions. [2018-01-24 16:08:51,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-01-24 16:08:51,284 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 16:08:51,284 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 16:08:51,284 INFO L371 AbstractCegarLoop]: === Iteration 4 === [mainErr51RequiresViolation, mainErr26RequiresViolation, mainErr54RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr58RequiresViolation, mainErr15RequiresViolation, mainErr49RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr35RequiresViolation, mainErr55RequiresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr57RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr50RequiresViolation, mainErr37RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr59RequiresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr56RequiresViolation, mainErr48RequiresViolation, mainErr39RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr52RequiresViolation, mainErr45RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr60EnsuresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr9RequiresViolation, mainErr53RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr47RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 16:08:51,285 INFO L82 PathProgramCache]: Analyzing trace with hash 1424550360, now seen corresponding path program 1 times [2018-01-24 16:08:51,285 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 16:08:51,286 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 16:08:51,286 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 16:08:51,286 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 16:08:51,286 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 16:08:51,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 16:08:51,301 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 16:08:51,426 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 16:08:51,426 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 16:08:51,426 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-01-24 16:08:51,427 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 16:08:51,427 INFO L409 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-01-24 16:08:51,427 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-01-24 16:08:51,427 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-01-24 16:08:51,427 INFO L87 Difference]: Start difference. First operand 149 states and 162 transitions. Second operand 7 states. [2018-01-24 16:08:51,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 16:08:51,803 INFO L93 Difference]: Finished difference Result 239 states and 254 transitions. [2018-01-24 16:08:51,803 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-01-24 16:08:51,803 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 16 [2018-01-24 16:08:51,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 16:08:51,805 INFO L225 Difference]: With dead ends: 239 [2018-01-24 16:08:51,805 INFO L226 Difference]: Without dead ends: 235 [2018-01-24 16:08:51,806 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2018-01-24 16:08:51,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2018-01-24 16:08:51,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 158. [2018-01-24 16:08:51,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2018-01-24 16:08:51,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 173 transitions. [2018-01-24 16:08:51,821 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 173 transitions. Word has length 16 [2018-01-24 16:08:51,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 16:08:51,822 INFO L432 AbstractCegarLoop]: Abstraction has 158 states and 173 transitions. [2018-01-24 16:08:51,822 INFO L433 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-01-24 16:08:51,822 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 173 transitions. [2018-01-24 16:08:51,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-01-24 16:08:51,822 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 16:08:51,823 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 16:08:51,823 INFO L371 AbstractCegarLoop]: === Iteration 5 === [mainErr51RequiresViolation, mainErr26RequiresViolation, mainErr54RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr58RequiresViolation, mainErr15RequiresViolation, mainErr49RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr35RequiresViolation, mainErr55RequiresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr57RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr50RequiresViolation, mainErr37RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr59RequiresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr56RequiresViolation, mainErr48RequiresViolation, mainErr39RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr52RequiresViolation, mainErr45RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr60EnsuresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr9RequiresViolation, mainErr53RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr47RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 16:08:51,823 INFO L82 PathProgramCache]: Analyzing trace with hash -1101672517, now seen corresponding path program 1 times [2018-01-24 16:08:51,823 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 16:08:51,824 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 16:08:51,824 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 16:08:51,824 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 16:08:51,824 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 16:08:51,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 16:08:51,843 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 16:08:51,917 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 16:08:51,917 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 16:08:51,918 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-01-24 16:08:51,918 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 16:08:51,919 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-24 16:08:51,919 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-24 16:08:51,919 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-01-24 16:08:51,919 INFO L87 Difference]: Start difference. First operand 158 states and 173 transitions. Second operand 5 states. [2018-01-24 16:08:52,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 16:08:52,203 INFO L93 Difference]: Finished difference Result 260 states and 283 transitions. [2018-01-24 16:08:52,204 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-01-24 16:08:52,204 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2018-01-24 16:08:52,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 16:08:52,205 INFO L225 Difference]: With dead ends: 260 [2018-01-24 16:08:52,205 INFO L226 Difference]: Without dead ends: 259 [2018-01-24 16:08:52,206 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2018-01-24 16:08:52,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2018-01-24 16:08:52,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 157. [2018-01-24 16:08:52,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2018-01-24 16:08:52,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 171 transitions. [2018-01-24 16:08:52,218 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 171 transitions. Word has length 18 [2018-01-24 16:08:52,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 16:08:52,219 INFO L432 AbstractCegarLoop]: Abstraction has 157 states and 171 transitions. [2018-01-24 16:08:52,219 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-24 16:08:52,219 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 171 transitions. [2018-01-24 16:08:52,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-01-24 16:08:52,219 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 16:08:52,220 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 16:08:52,220 INFO L371 AbstractCegarLoop]: === Iteration 6 === [mainErr51RequiresViolation, mainErr26RequiresViolation, mainErr54RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr58RequiresViolation, mainErr15RequiresViolation, mainErr49RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr35RequiresViolation, mainErr55RequiresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr57RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr50RequiresViolation, mainErr37RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr59RequiresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr56RequiresViolation, mainErr48RequiresViolation, mainErr39RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr52RequiresViolation, mainErr45RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr60EnsuresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr9RequiresViolation, mainErr53RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr47RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 16:08:52,220 INFO L82 PathProgramCache]: Analyzing trace with hash -1101672518, now seen corresponding path program 1 times [2018-01-24 16:08:52,220 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 16:08:52,221 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 16:08:52,221 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 16:08:52,221 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 16:08:52,222 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 16:08:52,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 16:08:52,234 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 16:08:52,313 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 16:08:52,313 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 16:08:52,313 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-01-24 16:08:52,313 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 16:08:52,313 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-24 16:08:52,314 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-24 16:08:52,314 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-01-24 16:08:52,314 INFO L87 Difference]: Start difference. First operand 157 states and 171 transitions. Second operand 5 states. [2018-01-24 16:08:52,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 16:08:52,489 INFO L93 Difference]: Finished difference Result 250 states and 271 transitions. [2018-01-24 16:08:52,489 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-24 16:08:52,489 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2018-01-24 16:08:52,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 16:08:52,490 INFO L225 Difference]: With dead ends: 250 [2018-01-24 16:08:52,490 INFO L226 Difference]: Without dead ends: 249 [2018-01-24 16:08:52,491 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 [2018-01-24 16:08:52,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2018-01-24 16:08:52,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 156. [2018-01-24 16:08:52,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2018-01-24 16:08:52,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 169 transitions. [2018-01-24 16:08:52,499 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 169 transitions. Word has length 18 [2018-01-24 16:08:52,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 16:08:52,499 INFO L432 AbstractCegarLoop]: Abstraction has 156 states and 169 transitions. [2018-01-24 16:08:52,499 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-24 16:08:52,499 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 169 transitions. [2018-01-24 16:08:52,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-01-24 16:08:52,500 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 16:08:52,500 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 16:08:52,500 INFO L371 AbstractCegarLoop]: === Iteration 7 === [mainErr51RequiresViolation, mainErr26RequiresViolation, mainErr54RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr58RequiresViolation, mainErr15RequiresViolation, mainErr49RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr35RequiresViolation, mainErr55RequiresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr57RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr50RequiresViolation, mainErr37RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr59RequiresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr56RequiresViolation, mainErr48RequiresViolation, mainErr39RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr52RequiresViolation, mainErr45RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr60EnsuresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr9RequiresViolation, mainErr53RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr47RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 16:08:52,500 INFO L82 PathProgramCache]: Analyzing trace with hash -82522180, now seen corresponding path program 1 times [2018-01-24 16:08:52,500 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 16:08:52,501 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 16:08:52,501 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 16:08:52,501 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 16:08:52,501 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 16:08:52,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 16:08:52,514 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 16:08:52,592 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 16:08:52,593 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 16:08:52,593 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2018-01-24 16:08:52,593 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 16:08:52,593 INFO L409 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-01-24 16:08:52,594 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-01-24 16:08:52,594 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2018-01-24 16:08:52,594 INFO L87 Difference]: Start difference. First operand 156 states and 169 transitions. Second operand 9 states. [2018-01-24 16:08:52,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 16:08:52,932 INFO L93 Difference]: Finished difference Result 160 states and 171 transitions. [2018-01-24 16:08:52,932 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-01-24 16:08:52,932 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 22 [2018-01-24 16:08:52,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 16:08:52,933 INFO L225 Difference]: With dead ends: 160 [2018-01-24 16:08:52,933 INFO L226 Difference]: Without dead ends: 159 [2018-01-24 16:08:52,933 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2018-01-24 16:08:52,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2018-01-24 16:08:52,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 155. [2018-01-24 16:08:52,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2018-01-24 16:08:52,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 168 transitions. [2018-01-24 16:08:52,940 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 168 transitions. Word has length 22 [2018-01-24 16:08:52,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 16:08:52,940 INFO L432 AbstractCegarLoop]: Abstraction has 155 states and 168 transitions. [2018-01-24 16:08:52,940 INFO L433 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-01-24 16:08:52,940 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 168 transitions. [2018-01-24 16:08:52,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-01-24 16:08:52,941 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 16:08:52,941 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 16:08:52,941 INFO L371 AbstractCegarLoop]: === Iteration 8 === [mainErr51RequiresViolation, mainErr26RequiresViolation, mainErr54RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr58RequiresViolation, mainErr15RequiresViolation, mainErr49RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr35RequiresViolation, mainErr55RequiresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr57RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr50RequiresViolation, mainErr37RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr59RequiresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr56RequiresViolation, mainErr48RequiresViolation, mainErr39RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr52RequiresViolation, mainErr45RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr60EnsuresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr9RequiresViolation, mainErr53RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr47RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 16:08:52,941 INFO L82 PathProgramCache]: Analyzing trace with hash -82522179, now seen corresponding path program 1 times [2018-01-24 16:08:52,941 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 16:08:52,942 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 16:08:52,942 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 16:08:52,942 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 16:08:52,942 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 16:08:52,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 16:08:52,958 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 16:08:53,126 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 16:08:53,127 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 16:08:53,127 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2018-01-24 16:08:53,127 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 16:08:53,127 INFO L409 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-01-24 16:08:53,127 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-01-24 16:08:53,128 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2018-01-24 16:08:53,128 INFO L87 Difference]: Start difference. First operand 155 states and 168 transitions. Second operand 10 states. [2018-01-24 16:08:53,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 16:08:53,795 INFO L93 Difference]: Finished difference Result 226 states and 240 transitions. [2018-01-24 16:08:53,796 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-01-24 16:08:53,796 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 22 [2018-01-24 16:08:53,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 16:08:53,797 INFO L225 Difference]: With dead ends: 226 [2018-01-24 16:08:53,797 INFO L226 Difference]: Without dead ends: 219 [2018-01-24 16:08:53,798 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2018-01-24 16:08:53,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2018-01-24 16:08:53,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 139. [2018-01-24 16:08:53,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2018-01-24 16:08:53,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 151 transitions. [2018-01-24 16:08:53,805 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 151 transitions. Word has length 22 [2018-01-24 16:08:53,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 16:08:53,806 INFO L432 AbstractCegarLoop]: Abstraction has 139 states and 151 transitions. [2018-01-24 16:08:53,806 INFO L433 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-01-24 16:08:53,806 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 151 transitions. [2018-01-24 16:08:53,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-01-24 16:08:53,807 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 16:08:53,807 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 16:08:53,807 INFO L371 AbstractCegarLoop]: === Iteration 9 === [mainErr51RequiresViolation, mainErr26RequiresViolation, mainErr54RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr58RequiresViolation, mainErr15RequiresViolation, mainErr49RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr35RequiresViolation, mainErr55RequiresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr57RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr50RequiresViolation, mainErr37RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr59RequiresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr56RequiresViolation, mainErr48RequiresViolation, mainErr39RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr52RequiresViolation, mainErr45RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr60EnsuresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr9RequiresViolation, mainErr53RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr47RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 16:08:53,807 INFO L82 PathProgramCache]: Analyzing trace with hash 1060471439, now seen corresponding path program 1 times [2018-01-24 16:08:53,807 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 16:08:53,808 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 16:08:53,808 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 16:08:53,808 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 16:08:53,808 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 16:08:53,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 16:08:53,821 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 16:08:53,954 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 16:08:53,957 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 16:08:53,958 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-01-24 16:08:53,958 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 16:08:53,958 INFO L409 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-01-24 16:08:53,958 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-01-24 16:08:53,959 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-01-24 16:08:53,959 INFO L87 Difference]: Start difference. First operand 139 states and 151 transitions. Second operand 6 states. [2018-01-24 16:08:54,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 16:08:54,213 INFO L93 Difference]: Finished difference Result 258 states and 282 transitions. [2018-01-24 16:08:54,213 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-01-24 16:08:54,213 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 29 [2018-01-24 16:08:54,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 16:08:54,215 INFO L225 Difference]: With dead ends: 258 [2018-01-24 16:08:54,215 INFO L226 Difference]: Without dead ends: 222 [2018-01-24 16:08:54,216 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2018-01-24 16:08:54,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2018-01-24 16:08:54,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 198. [2018-01-24 16:08:54,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2018-01-24 16:08:54,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 228 transitions. [2018-01-24 16:08:54,229 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 228 transitions. Word has length 29 [2018-01-24 16:08:54,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 16:08:54,229 INFO L432 AbstractCegarLoop]: Abstraction has 198 states and 228 transitions. [2018-01-24 16:08:54,229 INFO L433 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-01-24 16:08:54,229 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 228 transitions. [2018-01-24 16:08:54,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-01-24 16:08:54,231 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 16:08:54,231 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 16:08:54,231 INFO L371 AbstractCegarLoop]: === Iteration 10 === [mainErr51RequiresViolation, mainErr26RequiresViolation, mainErr54RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr58RequiresViolation, mainErr15RequiresViolation, mainErr49RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr35RequiresViolation, mainErr55RequiresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr57RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr50RequiresViolation, mainErr37RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr59RequiresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr56RequiresViolation, mainErr48RequiresViolation, mainErr39RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr52RequiresViolation, mainErr45RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr60EnsuresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr9RequiresViolation, mainErr53RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr47RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 16:08:54,231 INFO L82 PathProgramCache]: Analyzing trace with hash 109889057, now seen corresponding path program 1 times [2018-01-24 16:08:54,232 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 16:08:54,232 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 16:08:54,233 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 16:08:54,233 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 16:08:54,233 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 16:08:54,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 16:08:54,243 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 16:08:54,271 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 16:08:54,271 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 16:08:54,271 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-24 16:08:54,271 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 16:08:54,272 INFO L409 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-01-24 16:08:54,272 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-01-24 16:08:54,272 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-01-24 16:08:54,272 INFO L87 Difference]: Start difference. First operand 198 states and 228 transitions. Second operand 3 states. [2018-01-24 16:08:54,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 16:08:54,304 INFO L93 Difference]: Finished difference Result 361 states and 407 transitions. [2018-01-24 16:08:54,304 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-01-24 16:08:54,305 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2018-01-24 16:08:54,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 16:08:54,306 INFO L225 Difference]: With dead ends: 361 [2018-01-24 16:08:54,306 INFO L226 Difference]: Without dead ends: 181 [2018-01-24 16:08:54,307 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-01-24 16:08:54,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2018-01-24 16:08:54,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 163. [2018-01-24 16:08:54,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2018-01-24 16:08:54,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 176 transitions. [2018-01-24 16:08:54,316 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 176 transitions. Word has length 29 [2018-01-24 16:08:54,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 16:08:54,316 INFO L432 AbstractCegarLoop]: Abstraction has 163 states and 176 transitions. [2018-01-24 16:08:54,316 INFO L433 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-01-24 16:08:54,316 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 176 transitions. [2018-01-24 16:08:54,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-01-24 16:08:54,317 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 16:08:54,317 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 16:08:54,318 INFO L371 AbstractCegarLoop]: === Iteration 11 === [mainErr51RequiresViolation, mainErr26RequiresViolation, mainErr54RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr58RequiresViolation, mainErr15RequiresViolation, mainErr49RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr35RequiresViolation, mainErr55RequiresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr57RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr50RequiresViolation, mainErr37RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr59RequiresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr56RequiresViolation, mainErr48RequiresViolation, mainErr39RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr52RequiresViolation, mainErr45RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr60EnsuresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr9RequiresViolation, mainErr53RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr47RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 16:08:54,318 INFO L82 PathProgramCache]: Analyzing trace with hash -1428666095, now seen corresponding path program 1 times [2018-01-24 16:08:54,318 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 16:08:54,319 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 16:08:54,319 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 16:08:54,319 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 16:08:54,319 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 16:08:54,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 16:08:54,330 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 16:08:54,377 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 16:08:54,378 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 16:08:54,378 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-01-24 16:08:54,378 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 16:08:54,378 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-24 16:08:54,378 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-24 16:08:54,378 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-24 16:08:54,379 INFO L87 Difference]: Start difference. First operand 163 states and 176 transitions. Second operand 4 states. [2018-01-24 16:08:54,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 16:08:54,506 INFO L93 Difference]: Finished difference Result 166 states and 178 transitions. [2018-01-24 16:08:54,507 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-01-24 16:08:54,507 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 30 [2018-01-24 16:08:54,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 16:08:54,508 INFO L225 Difference]: With dead ends: 166 [2018-01-24 16:08:54,508 INFO L226 Difference]: Without dead ends: 163 [2018-01-24 16:08:54,509 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 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 16:08:54,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2018-01-24 16:08:54,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 163. [2018-01-24 16:08:54,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2018-01-24 16:08:54,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 175 transitions. [2018-01-24 16:08:54,515 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 175 transitions. Word has length 30 [2018-01-24 16:08:54,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 16:08:54,515 INFO L432 AbstractCegarLoop]: Abstraction has 163 states and 175 transitions. [2018-01-24 16:08:54,516 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-24 16:08:54,516 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 175 transitions. [2018-01-24 16:08:54,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-01-24 16:08:54,516 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 16:08:54,516 INFO L322 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 16:08:54,517 INFO L371 AbstractCegarLoop]: === Iteration 12 === [mainErr51RequiresViolation, mainErr26RequiresViolation, mainErr54RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr58RequiresViolation, mainErr15RequiresViolation, mainErr49RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr35RequiresViolation, mainErr55RequiresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr57RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr50RequiresViolation, mainErr37RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr59RequiresViolation, mainErr28RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr56RequiresViolation, mainErr48RequiresViolation, mainErr39RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr52RequiresViolation, mainErr45RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr60EnsuresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr9RequiresViolation, mainErr53RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr47RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 16:08:54,517 INFO L82 PathProgramCache]: Analyzing trace with hash -578814549, now seen corresponding path program 1 times [2018-01-24 16:08:54,517 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 16:08:54,518 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 16:08:54,518 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 16:08:54,518 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 16:08:54,518 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 16:08:54,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 16:08:54,526 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 16:08:54,741 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 16:08:54,741 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-24 16:08:54,741 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-24 16:08:54,742 INFO L199 CegarAbsIntRunner]: Running AI on error trace of length 35 with the following transitions: [2018-01-24 16:08:54,744 INFO L201 CegarAbsIntRunner]: [0], [1], [2], [5], [8], [11], [15], [17], [20], [108], [113], [117], [165], [232], [354], [356], [359], [363], [365], [370], [374], [414], [420], [421], [422], [424], [425], [434], [435], [439], [440], [441] [2018-01-24 16:08:54,802 INFO L147 AbstractInterpreter]: Using domain VPDomain [2018-01-24 16:08:54,802 INFO L101 FixpointEngine]: Starting fixpoint engine with domain VPDomain (maxUnwinding=3, maxParallelStates=2) [2018-01-24 16:09:18,912 INFO L262 AbstractInterpreter]: Error location(s) were unreachable [2018-01-24 16:09:18,914 INFO L268 AbstractInterpreter]: Visited 32 different actions 34 times. Merged at 2 different actions 2 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 28 variables. [2018-01-24 16:09:18,924 INFO L395 sIntCurrentIteration]: Generating AbsInt predicates Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown