java -Xmx6000000000 -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data ./data --generate-csv --csv-dir ../../../releaseScripts/default/UAutomizer-linux/csv -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/ai/eq-bench/svcomp-DerefFreeMemtrack-32bit-Automizer_Taipan+AI_EQ_mostprecise.epf -i ../../../trunk/examples/svcomp/memsafety/test-0232_false-valid-memtrack.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-6b94a2f [2018-01-24 20:08:24,875 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-24 20:08:24,876 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-24 20:08:24,890 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-24 20:08:24,890 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-24 20:08:24,891 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-24 20:08:24,892 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-24 20:08:24,893 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-24 20:08:24,894 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-24 20:08:24,895 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-24 20:08:24,896 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-01-24 20:08:24,896 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-01-24 20:08:24,896 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-01-24 20:08:24,898 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-01-24 20:08:24,898 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-01-24 20:08:24,901 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-01-24 20:08:24,903 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-01-24 20:08:24,905 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-01-24 20:08:24,906 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-01-24 20:08:24,908 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-01-24 20:08:24,910 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-01-24 20:08:24,910 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-01-24 20:08:24,911 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-01-24 20:08:24,912 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-01-24 20:08:24,912 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-01-24 20:08:24,914 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-01-24 20:08:24,914 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-01-24 20:08:24,915 INFO L177 SettingsManager]: PEA to Boogie provides no preferences, ignoring... [2018-01-24 20:08:24,915 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-01-24 20:08:24,915 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-01-24 20:08:24,916 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-01-24 20:08:24,916 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/eq-bench/svcomp-DerefFreeMemtrack-32bit-Automizer_Taipan+AI_EQ_mostprecise.epf [2018-01-24 20:08:24,926 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-24 20:08:24,926 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-24 20:08:24,927 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-24 20:08:24,927 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-24 20:08:24,927 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-24 20:08:24,927 INFO L133 SettingsManager]: * Weq Fattening=true [2018-01-24 20:08:24,927 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-24 20:08:24,928 INFO L133 SettingsManager]: * Precise comparison operator=true [2018-01-24 20:08:24,928 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-24 20:08:24,929 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-24 20:08:24,929 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-24 20:08:24,929 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-24 20:08:24,929 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-24 20:08:24,929 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-24 20:08:24,929 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-24 20:08:24,930 INFO L133 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2018-01-24 20:08:24,930 INFO L133 SettingsManager]: * Bitprecise bitfields=true [2018-01-24 20:08:24,930 INFO L133 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2018-01-24 20:08:24,930 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-24 20:08:24,930 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-24 20:08:24,931 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-24 20:08:24,931 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-01-24 20:08:24,931 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-24 20:08:24,931 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-24 20:08:24,931 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-24 20:08:24,931 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-24 20:08:24,932 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-24 20:08:24,932 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-24 20:08:24,932 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-24 20:08:24,932 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-24 20:08:24,932 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-01-24 20:08:24,933 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-24 20:08:24,933 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-24 20:08:24,933 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-24 20:08:24,933 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-01-24 20:08:24,934 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-24 20:08:24,934 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-24 20:08:24,966 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-24 20:08:24,975 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-24 20:08:24,979 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-24 20:08:24,981 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-24 20:08:24,981 INFO L276 PluginConnector]: CDTParser initialized [2018-01-24 20:08:24,982 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/memsafety/test-0232_false-valid-memtrack.i [2018-01-24 20:08:25,141 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-24 20:08:25,148 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-24 20:08:25,149 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-24 20:08:25,149 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-24 20:08:25,155 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-24 20:08:25,156 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.01 08:08:25" (1/1) ... [2018-01-24 20:08:25,160 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4e82129b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 08:08:25, skipping insertion in model container [2018-01-24 20:08:25,161 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.01 08:08:25" (1/1) ... [2018-01-24 20:08:25,180 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-24 20:08:25,219 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-24 20:08:25,336 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-24 20:08:25,350 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-24 20:08:25,357 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 08:08:25 WrapperNode [2018-01-24 20:08:25,358 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-24 20:08:25,359 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-24 20:08:25,359 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-24 20:08:25,359 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-24 20:08:25,376 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 08:08:25" (1/1) ... [2018-01-24 20:08:25,376 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 08:08:25" (1/1) ... [2018-01-24 20:08:25,386 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 08:08:25" (1/1) ... [2018-01-24 20:08:25,387 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 08:08:25" (1/1) ... [2018-01-24 20:08:25,391 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 08:08:25" (1/1) ... [2018-01-24 20:08:25,394 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 08:08:25" (1/1) ... [2018-01-24 20:08:25,395 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 08:08:25" (1/1) ... [2018-01-24 20:08:25,397 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-24 20:08:25,397 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-24 20:08:25,397 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-24 20:08:25,397 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-24 20:08:25,398 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 08:08:25" (1/1) ... No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-24 20:08:25,445 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-24 20:08:25,445 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-24 20:08:25,446 INFO L136 BoogieDeclarations]: Found implementation of procedure append [2018-01-24 20:08:25,446 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-24 20:08:25,446 INFO L128 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2018-01-24 20:08:25,446 INFO L128 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2018-01-24 20:08:25,446 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-01-24 20:08:25,446 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-01-24 20:08:25,446 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-01-24 20:08:25,446 INFO L128 BoogieDeclarations]: Found specification of procedure malloc [2018-01-24 20:08:25,446 INFO L128 BoogieDeclarations]: Found specification of procedure free [2018-01-24 20:08:25,446 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-01-24 20:08:25,447 INFO L128 BoogieDeclarations]: Found specification of procedure append [2018-01-24 20:08:25,447 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-24 20:08:25,447 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-24 20:08:25,447 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-24 20:08:25,812 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-24 20:08:25,813 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.01 08:08:25 BoogieIcfgContainer [2018-01-24 20:08:25,813 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-24 20:08:25,814 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-01-24 20:08:25,814 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-01-24 20:08:25,816 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-01-24 20:08:25,817 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.01 08:08:25" (1/3) ... [2018-01-24 20:08:25,818 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@716ccdda and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.01 08:08:25, skipping insertion in model container [2018-01-24 20:08:25,818 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 08:08:25" (2/3) ... [2018-01-24 20:08:25,819 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@716ccdda and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.01 08:08:25, skipping insertion in model container [2018-01-24 20:08:25,819 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.01 08:08:25" (3/3) ... [2018-01-24 20:08:25,821 INFO L105 eAbstractionObserver]: Analyzing ICFG test-0232_false-valid-memtrack.i [2018-01-24 20:08:25,830 INFO L130 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-01-24 20:08:25,838 INFO L142 ceAbstractionStarter]: Appying trace abstraction to program that has 41 error locations. [2018-01-24 20:08:25,889 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-24 20:08:25,889 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-24 20:08:25,889 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-24 20:08:25,889 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-24 20:08:25,889 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-24 20:08:25,890 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-24 20:08:25,890 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-24 20:08:25,890 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-01-24 20:08:25,891 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-24 20:08:25,914 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states. [2018-01-24 20:08:25,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-01-24 20:08:25,921 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 20:08:25,922 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-01-24 20:08:25,923 INFO L371 AbstractCegarLoop]: === Iteration 1 === [mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr0RequiresViolation, mainErr21RequiresViolation, mainErr3RequiresViolation, mainErr15RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr1RequiresViolation, mainErr17RequiresViolation, mainErr9RequiresViolation, mainErr26EnsuresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr11RequiresViolation, mainErr24RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr4RequiresViolation, mainErr14RequiresViolation, appendErr0RequiresViolation, appendErr9RequiresViolation, appendErr13RequiresViolation, appendErr4RequiresViolation, appendErr8RequiresViolation, appendErr10RequiresViolation, appendErr5RequiresViolation, appendErr12RequiresViolation, appendErr11RequiresViolation, appendErr7RequiresViolation, appendErr3RequiresViolation, appendErr2RequiresViolation, appendErr1RequiresViolation, appendErr6RequiresViolation]=== [2018-01-24 20:08:25,928 INFO L82 PathProgramCache]: Analyzing trace with hash -758648706, now seen corresponding path program 1 times [2018-01-24 20:08:25,931 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 20:08:25,979 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:08:25,980 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 20:08:25,980 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:08:25,980 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 20:08:26,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 20:08:26,021 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 20:08:26,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 20:08:26,072 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 20:08:26,073 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-24 20:08:26,073 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 20:08:26,075 INFO L409 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-01-24 20:08:26,089 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-01-24 20:08:26,090 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-01-24 20:08:26,093 INFO L87 Difference]: Start difference. First operand 96 states. Second operand 3 states. [2018-01-24 20:08:26,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 20:08:26,350 INFO L93 Difference]: Finished difference Result 144 states and 158 transitions. [2018-01-24 20:08:26,350 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-01-24 20:08:26,351 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2018-01-24 20:08:26,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 20:08:26,361 INFO L225 Difference]: With dead ends: 144 [2018-01-24 20:08:26,361 INFO L226 Difference]: Without dead ends: 89 [2018-01-24 20:08:26,364 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-01-24 20:08:26,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-01-24 20:08:26,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 87. [2018-01-24 20:08:26,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-01-24 20:08:26,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 90 transitions. [2018-01-24 20:08:26,403 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 90 transitions. Word has length 7 [2018-01-24 20:08:26,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 20:08:26,403 INFO L432 AbstractCegarLoop]: Abstraction has 87 states and 90 transitions. [2018-01-24 20:08:26,403 INFO L433 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-01-24 20:08:26,403 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 90 transitions. [2018-01-24 20:08:26,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-01-24 20:08:26,403 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 20:08:26,404 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-01-24 20:08:26,404 INFO L371 AbstractCegarLoop]: === Iteration 2 === [mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr0RequiresViolation, mainErr21RequiresViolation, mainErr3RequiresViolation, mainErr15RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr1RequiresViolation, mainErr17RequiresViolation, mainErr9RequiresViolation, mainErr26EnsuresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr11RequiresViolation, mainErr24RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr4RequiresViolation, mainErr14RequiresViolation, appendErr0RequiresViolation, appendErr9RequiresViolation, appendErr13RequiresViolation, appendErr4RequiresViolation, appendErr8RequiresViolation, appendErr10RequiresViolation, appendErr5RequiresViolation, appendErr12RequiresViolation, appendErr11RequiresViolation, appendErr7RequiresViolation, appendErr3RequiresViolation, appendErr2RequiresViolation, appendErr1RequiresViolation, appendErr6RequiresViolation]=== [2018-01-24 20:08:26,404 INFO L82 PathProgramCache]: Analyzing trace with hash -758648705, now seen corresponding path program 1 times [2018-01-24 20:08:26,404 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 20:08:26,405 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:08:26,405 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 20:08:26,405 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:08:26,405 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 20:08:26,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 20:08:26,416 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 20:08:26,475 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 20:08:26,475 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 20:08:26,475 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-24 20:08:26,475 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 20:08:26,477 INFO L409 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-01-24 20:08:26,477 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-01-24 20:08:26,477 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-01-24 20:08:26,477 INFO L87 Difference]: Start difference. First operand 87 states and 90 transitions. Second operand 3 states. [2018-01-24 20:08:26,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 20:08:26,675 INFO L93 Difference]: Finished difference Result 89 states and 93 transitions. [2018-01-24 20:08:26,675 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-01-24 20:08:26,675 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2018-01-24 20:08:26,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 20:08:26,677 INFO L225 Difference]: With dead ends: 89 [2018-01-24 20:08:26,677 INFO L226 Difference]: Without dead ends: 88 [2018-01-24 20:08:26,678 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-01-24 20:08:26,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2018-01-24 20:08:26,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 86. [2018-01-24 20:08:26,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2018-01-24 20:08:26,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 89 transitions. [2018-01-24 20:08:26,688 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 89 transitions. Word has length 7 [2018-01-24 20:08:26,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 20:08:26,688 INFO L432 AbstractCegarLoop]: Abstraction has 86 states and 89 transitions. [2018-01-24 20:08:26,688 INFO L433 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-01-24 20:08:26,688 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 89 transitions. [2018-01-24 20:08:26,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-01-24 20:08:26,689 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 20:08:26,689 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 20:08:26,689 INFO L371 AbstractCegarLoop]: === Iteration 3 === [mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr0RequiresViolation, mainErr21RequiresViolation, mainErr3RequiresViolation, mainErr15RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr1RequiresViolation, mainErr17RequiresViolation, mainErr9RequiresViolation, mainErr26EnsuresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr11RequiresViolation, mainErr24RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr4RequiresViolation, mainErr14RequiresViolation, appendErr0RequiresViolation, appendErr9RequiresViolation, appendErr13RequiresViolation, appendErr4RequiresViolation, appendErr8RequiresViolation, appendErr10RequiresViolation, appendErr5RequiresViolation, appendErr12RequiresViolation, appendErr11RequiresViolation, appendErr7RequiresViolation, appendErr3RequiresViolation, appendErr2RequiresViolation, appendErr1RequiresViolation, appendErr6RequiresViolation]=== [2018-01-24 20:08:26,690 INFO L82 PathProgramCache]: Analyzing trace with hash 689934579, now seen corresponding path program 1 times [2018-01-24 20:08:26,690 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 20:08:26,691 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:08:26,691 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 20:08:26,691 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:08:26,691 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 20:08:26,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 20:08:26,711 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 20:08:26,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 20:08:26,784 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 20:08:26,784 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-01-24 20:08:26,785 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 20:08:26,785 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-24 20:08:26,785 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-24 20:08:26,785 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-01-24 20:08:26,786 INFO L87 Difference]: Start difference. First operand 86 states and 89 transitions. Second operand 5 states. [2018-01-24 20:08:26,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 20:08:26,994 INFO L93 Difference]: Finished difference Result 86 states and 89 transitions. [2018-01-24 20:08:26,994 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-24 20:08:26,994 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2018-01-24 20:08:26,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 20:08:26,995 INFO L225 Difference]: With dead ends: 86 [2018-01-24 20:08:26,996 INFO L226 Difference]: Without dead ends: 83 [2018-01-24 20:08:26,996 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-01-24 20:08:26,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-01-24 20:08:27,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2018-01-24 20:08:27,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-01-24 20:08:27,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 86 transitions. [2018-01-24 20:08:27,005 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 86 transitions. Word has length 13 [2018-01-24 20:08:27,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 20:08:27,005 INFO L432 AbstractCegarLoop]: Abstraction has 83 states and 86 transitions. [2018-01-24 20:08:27,005 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-24 20:08:27,005 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 86 transitions. [2018-01-24 20:08:27,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-01-24 20:08:27,006 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 20:08:27,006 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 20:08:27,006 INFO L371 AbstractCegarLoop]: === Iteration 4 === [mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr0RequiresViolation, mainErr21RequiresViolation, mainErr3RequiresViolation, mainErr15RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr1RequiresViolation, mainErr17RequiresViolation, mainErr9RequiresViolation, mainErr26EnsuresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr11RequiresViolation, mainErr24RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr4RequiresViolation, mainErr14RequiresViolation, appendErr0RequiresViolation, appendErr9RequiresViolation, appendErr13RequiresViolation, appendErr4RequiresViolation, appendErr8RequiresViolation, appendErr10RequiresViolation, appendErr5RequiresViolation, appendErr12RequiresViolation, appendErr11RequiresViolation, appendErr7RequiresViolation, appendErr3RequiresViolation, appendErr2RequiresViolation, appendErr1RequiresViolation, appendErr6RequiresViolation]=== [2018-01-24 20:08:27,007 INFO L82 PathProgramCache]: Analyzing trace with hash 689934580, now seen corresponding path program 1 times [2018-01-24 20:08:27,007 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 20:08:27,008 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:08:27,008 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 20:08:27,008 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:08:27,008 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 20:08:27,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 20:08:27,025 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 20:08:27,173 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 20:08:27,173 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 20:08:27,173 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-01-24 20:08:27,173 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 20:08:27,174 INFO L409 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-01-24 20:08:27,174 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-01-24 20:08:27,174 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-01-24 20:08:27,174 INFO L87 Difference]: Start difference. First operand 83 states and 86 transitions. Second operand 7 states. [2018-01-24 20:08:27,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 20:08:27,359 INFO L93 Difference]: Finished difference Result 83 states and 86 transitions. [2018-01-24 20:08:27,359 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-01-24 20:08:27,359 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 13 [2018-01-24 20:08:27,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 20:08:27,360 INFO L225 Difference]: With dead ends: 83 [2018-01-24 20:08:27,360 INFO L226 Difference]: Without dead ends: 73 [2018-01-24 20:08:27,361 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2018-01-24 20:08:27,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-01-24 20:08:27,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2018-01-24 20:08:27,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-01-24 20:08:27,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 76 transitions. [2018-01-24 20:08:27,368 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 76 transitions. Word has length 13 [2018-01-24 20:08:27,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 20:08:27,368 INFO L432 AbstractCegarLoop]: Abstraction has 73 states and 76 transitions. [2018-01-24 20:08:27,368 INFO L433 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-01-24 20:08:27,368 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 76 transitions. [2018-01-24 20:08:27,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-01-24 20:08:27,369 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 20:08:27,369 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 20:08:27,369 INFO L371 AbstractCegarLoop]: === Iteration 5 === [mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr0RequiresViolation, mainErr21RequiresViolation, mainErr3RequiresViolation, mainErr15RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr1RequiresViolation, mainErr17RequiresViolation, mainErr9RequiresViolation, mainErr26EnsuresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr11RequiresViolation, mainErr24RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr4RequiresViolation, mainErr14RequiresViolation, appendErr0RequiresViolation, appendErr9RequiresViolation, appendErr13RequiresViolation, appendErr4RequiresViolation, appendErr8RequiresViolation, appendErr10RequiresViolation, appendErr5RequiresViolation, appendErr12RequiresViolation, appendErr11RequiresViolation, appendErr7RequiresViolation, appendErr3RequiresViolation, appendErr2RequiresViolation, appendErr1RequiresViolation, appendErr6RequiresViolation]=== [2018-01-24 20:08:27,369 INFO L82 PathProgramCache]: Analyzing trace with hash -86864468, now seen corresponding path program 1 times [2018-01-24 20:08:27,370 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 20:08:27,370 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:08:27,370 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 20:08:27,370 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:08:27,371 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 20:08:27,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 20:08:27,383 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 20:08:27,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 20:08:27,410 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 20:08:27,410 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-24 20:08:27,410 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 20:08:27,410 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-24 20:08:27,411 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-24 20:08:27,411 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-24 20:08:27,411 INFO L87 Difference]: Start difference. First operand 73 states and 76 transitions. Second operand 4 states. [2018-01-24 20:08:27,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 20:08:27,483 INFO L93 Difference]: Finished difference Result 73 states and 76 transitions. [2018-01-24 20:08:27,483 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-01-24 20:08:27,484 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2018-01-24 20:08:27,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 20:08:27,484 INFO L225 Difference]: With dead ends: 73 [2018-01-24 20:08:27,485 INFO L226 Difference]: Without dead ends: 69 [2018-01-24 20:08:27,485 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-01-24 20:08:27,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-01-24 20:08:27,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2018-01-24 20:08:27,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-01-24 20:08:27,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 72 transitions. [2018-01-24 20:08:27,490 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 72 transitions. Word has length 14 [2018-01-24 20:08:27,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 20:08:27,490 INFO L432 AbstractCegarLoop]: Abstraction has 69 states and 72 transitions. [2018-01-24 20:08:27,490 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-24 20:08:27,490 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 72 transitions. [2018-01-24 20:08:27,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-01-24 20:08:27,491 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 20:08:27,491 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 20:08:27,491 INFO L371 AbstractCegarLoop]: === Iteration 6 === [mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr0RequiresViolation, mainErr21RequiresViolation, mainErr3RequiresViolation, mainErr15RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr1RequiresViolation, mainErr17RequiresViolation, mainErr9RequiresViolation, mainErr26EnsuresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr11RequiresViolation, mainErr24RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr4RequiresViolation, mainErr14RequiresViolation, appendErr0RequiresViolation, appendErr9RequiresViolation, appendErr13RequiresViolation, appendErr4RequiresViolation, appendErr8RequiresViolation, appendErr10RequiresViolation, appendErr5RequiresViolation, appendErr12RequiresViolation, appendErr11RequiresViolation, appendErr7RequiresViolation, appendErr3RequiresViolation, appendErr2RequiresViolation, appendErr1RequiresViolation, appendErr6RequiresViolation]=== [2018-01-24 20:08:27,491 INFO L82 PathProgramCache]: Analyzing trace with hash -86864467, now seen corresponding path program 1 times [2018-01-24 20:08:27,491 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 20:08:27,492 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:08:27,492 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 20:08:27,492 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:08:27,492 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 20:08:27,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 20:08:27,506 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 20:08:27,545 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 20:08:27,546 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 20:08:27,553 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-24 20:08:27,553 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 20:08:27,553 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-24 20:08:27,554 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-24 20:08:27,554 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-24 20:08:27,554 INFO L87 Difference]: Start difference. First operand 69 states and 72 transitions. Second operand 4 states. [2018-01-24 20:08:27,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 20:08:27,606 INFO L93 Difference]: Finished difference Result 69 states and 72 transitions. [2018-01-24 20:08:27,606 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-01-24 20:08:27,607 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2018-01-24 20:08:27,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 20:08:27,608 INFO L225 Difference]: With dead ends: 69 [2018-01-24 20:08:27,608 INFO L226 Difference]: Without dead ends: 65 [2018-01-24 20:08:27,608 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-01-24 20:08:27,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-01-24 20:08:27,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2018-01-24 20:08:27,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-01-24 20:08:27,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 68 transitions. [2018-01-24 20:08:27,614 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 68 transitions. Word has length 14 [2018-01-24 20:08:27,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 20:08:27,614 INFO L432 AbstractCegarLoop]: Abstraction has 65 states and 68 transitions. [2018-01-24 20:08:27,614 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-24 20:08:27,615 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 68 transitions. [2018-01-24 20:08:27,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-01-24 20:08:27,615 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 20:08:27,615 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 20:08:27,615 INFO L371 AbstractCegarLoop]: === Iteration 7 === [mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr0RequiresViolation, mainErr21RequiresViolation, mainErr3RequiresViolation, mainErr15RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr1RequiresViolation, mainErr17RequiresViolation, mainErr9RequiresViolation, mainErr26EnsuresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr11RequiresViolation, mainErr24RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr4RequiresViolation, mainErr14RequiresViolation, appendErr0RequiresViolation, appendErr9RequiresViolation, appendErr13RequiresViolation, appendErr4RequiresViolation, appendErr8RequiresViolation, appendErr10RequiresViolation, appendErr5RequiresViolation, appendErr12RequiresViolation, appendErr11RequiresViolation, appendErr7RequiresViolation, appendErr3RequiresViolation, appendErr2RequiresViolation, appendErr1RequiresViolation, appendErr6RequiresViolation]=== [2018-01-24 20:08:27,616 INFO L82 PathProgramCache]: Analyzing trace with hash -1124026018, now seen corresponding path program 1 times [2018-01-24 20:08:27,616 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 20:08:27,617 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:08:27,617 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 20:08:27,617 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:08:27,617 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 20:08:27,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 20:08:27,629 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 20:08:27,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 20:08:27,701 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 20:08:27,701 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2018-01-24 20:08:27,701 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 20:08:27,702 INFO L409 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-01-24 20:08:27,702 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-01-24 20:08:27,702 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2018-01-24 20:08:27,702 INFO L87 Difference]: Start difference. First operand 65 states and 68 transitions. Second operand 8 states. [2018-01-24 20:08:27,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 20:08:27,854 INFO L93 Difference]: Finished difference Result 138 states and 147 transitions. [2018-01-24 20:08:27,881 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-01-24 20:08:27,881 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 19 [2018-01-24 20:08:27,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 20:08:27,882 INFO L225 Difference]: With dead ends: 138 [2018-01-24 20:08:27,882 INFO L226 Difference]: Without dead ends: 80 [2018-01-24 20:08:27,882 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2018-01-24 20:08:27,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2018-01-24 20:08:27,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 75. [2018-01-24 20:08:27,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-01-24 20:08:27,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 79 transitions. [2018-01-24 20:08:27,890 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 79 transitions. Word has length 19 [2018-01-24 20:08:27,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 20:08:27,891 INFO L432 AbstractCegarLoop]: Abstraction has 75 states and 79 transitions. [2018-01-24 20:08:27,891 INFO L433 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-01-24 20:08:27,891 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 79 transitions. [2018-01-24 20:08:27,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-01-24 20:08:27,893 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 20:08:27,893 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 20:08:27,893 INFO L371 AbstractCegarLoop]: === Iteration 8 === [mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr0RequiresViolation, mainErr21RequiresViolation, mainErr3RequiresViolation, mainErr15RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr1RequiresViolation, mainErr17RequiresViolation, mainErr9RequiresViolation, mainErr26EnsuresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr11RequiresViolation, mainErr24RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr4RequiresViolation, mainErr14RequiresViolation, appendErr0RequiresViolation, appendErr9RequiresViolation, appendErr13RequiresViolation, appendErr4RequiresViolation, appendErr8RequiresViolation, appendErr10RequiresViolation, appendErr5RequiresViolation, appendErr12RequiresViolation, appendErr11RequiresViolation, appendErr7RequiresViolation, appendErr3RequiresViolation, appendErr2RequiresViolation, appendErr1RequiresViolation, appendErr6RequiresViolation]=== [2018-01-24 20:08:27,894 INFO L82 PathProgramCache]: Analyzing trace with hash 1338134626, now seen corresponding path program 1 times [2018-01-24 20:08:27,894 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 20:08:27,895 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:08:27,895 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 20:08:27,895 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:08:27,895 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 20:08:27,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 20:08:27,912 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 20:08:27,987 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 20:08:27,987 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 20:08:27,987 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-01-24 20:08:27,987 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 20:08:27,988 INFO L409 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-01-24 20:08:27,988 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-01-24 20:08:27,988 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2018-01-24 20:08:27,988 INFO L87 Difference]: Start difference. First operand 75 states and 79 transitions. Second operand 7 states. [2018-01-24 20:08:28,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 20:08:28,326 INFO L93 Difference]: Finished difference Result 89 states and 94 transitions. [2018-01-24 20:08:28,326 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-01-24 20:08:28,326 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 30 [2018-01-24 20:08:28,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 20:08:28,327 INFO L225 Difference]: With dead ends: 89 [2018-01-24 20:08:28,327 INFO L226 Difference]: Without dead ends: 88 [2018-01-24 20:08:28,328 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2018-01-24 20:08:28,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2018-01-24 20:08:28,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 74. [2018-01-24 20:08:28,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2018-01-24 20:08:28,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 78 transitions. [2018-01-24 20:08:28,332 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 78 transitions. Word has length 30 [2018-01-24 20:08:28,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 20:08:28,332 INFO L432 AbstractCegarLoop]: Abstraction has 74 states and 78 transitions. [2018-01-24 20:08:28,332 INFO L433 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-01-24 20:08:28,333 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 78 transitions. [2018-01-24 20:08:28,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-01-24 20:08:28,333 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 20:08:28,333 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 20:08:28,333 INFO L371 AbstractCegarLoop]: === Iteration 9 === [mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr0RequiresViolation, mainErr21RequiresViolation, mainErr3RequiresViolation, mainErr15RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr1RequiresViolation, mainErr17RequiresViolation, mainErr9RequiresViolation, mainErr26EnsuresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr11RequiresViolation, mainErr24RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr4RequiresViolation, mainErr14RequiresViolation, appendErr0RequiresViolation, appendErr9RequiresViolation, appendErr13RequiresViolation, appendErr4RequiresViolation, appendErr8RequiresViolation, appendErr10RequiresViolation, appendErr5RequiresViolation, appendErr12RequiresViolation, appendErr11RequiresViolation, appendErr7RequiresViolation, appendErr3RequiresViolation, appendErr2RequiresViolation, appendErr1RequiresViolation, appendErr6RequiresViolation]=== [2018-01-24 20:08:28,334 INFO L82 PathProgramCache]: Analyzing trace with hash 1338134627, now seen corresponding path program 1 times [2018-01-24 20:08:28,334 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 20:08:28,334 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:08:28,334 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 20:08:28,334 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:08:28,334 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 20:08:28,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 20:08:28,351 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 20:08:28,497 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 20:08:28,498 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 20:08:28,498 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2018-01-24 20:08:28,498 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 20:08:28,498 INFO L409 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-01-24 20:08:28,498 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-01-24 20:08:28,499 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2018-01-24 20:08:28,499 INFO L87 Difference]: Start difference. First operand 74 states and 78 transitions. Second operand 9 states. [2018-01-24 20:08:28,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 20:08:28,674 INFO L93 Difference]: Finished difference Result 92 states and 97 transitions. [2018-01-24 20:08:28,675 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-01-24 20:08:28,675 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 30 [2018-01-24 20:08:28,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 20:08:28,676 INFO L225 Difference]: With dead ends: 92 [2018-01-24 20:08:28,676 INFO L226 Difference]: Without dead ends: 91 [2018-01-24 20:08:28,676 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2018-01-24 20:08:28,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-01-24 20:08:28,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 73. [2018-01-24 20:08:28,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-01-24 20:08:28,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 77 transitions. [2018-01-24 20:08:28,682 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 77 transitions. Word has length 30 [2018-01-24 20:08:28,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 20:08:28,682 INFO L432 AbstractCegarLoop]: Abstraction has 73 states and 77 transitions. [2018-01-24 20:08:28,682 INFO L433 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-01-24 20:08:28,682 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 77 transitions. [2018-01-24 20:08:28,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-01-24 20:08:28,684 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 20:08:28,684 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 20:08:28,684 INFO L371 AbstractCegarLoop]: === Iteration 10 === [mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr0RequiresViolation, mainErr21RequiresViolation, mainErr3RequiresViolation, mainErr15RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr1RequiresViolation, mainErr17RequiresViolation, mainErr9RequiresViolation, mainErr26EnsuresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr11RequiresViolation, mainErr24RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr4RequiresViolation, mainErr14RequiresViolation, appendErr0RequiresViolation, appendErr9RequiresViolation, appendErr13RequiresViolation, appendErr4RequiresViolation, appendErr8RequiresViolation, appendErr10RequiresViolation, appendErr5RequiresViolation, appendErr12RequiresViolation, appendErr11RequiresViolation, appendErr7RequiresViolation, appendErr3RequiresViolation, appendErr2RequiresViolation, appendErr1RequiresViolation, appendErr6RequiresViolation]=== [2018-01-24 20:08:28,684 INFO L82 PathProgramCache]: Analyzing trace with hash -952870546, now seen corresponding path program 1 times [2018-01-24 20:08:28,684 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 20:08:28,685 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:08:28,686 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 20:08:28,686 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:08:28,686 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 20:08:28,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 20:08:28,702 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 20:08:28,749 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 20:08:28,749 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 20:08:28,749 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-24 20:08:28,749 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 20:08:28,749 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-24 20:08:28,749 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-24 20:08:28,750 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-01-24 20:08:28,750 INFO L87 Difference]: Start difference. First operand 73 states and 77 transitions. Second operand 5 states. [2018-01-24 20:08:28,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 20:08:28,826 INFO L93 Difference]: Finished difference Result 99 states and 104 transitions. [2018-01-24 20:08:28,827 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-24 20:08:28,827 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 33 [2018-01-24 20:08:28,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 20:08:28,827 INFO L225 Difference]: With dead ends: 99 [2018-01-24 20:08:28,827 INFO L226 Difference]: Without dead ends: 79 [2018-01-24 20:08:28,828 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-01-24 20:08:28,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-01-24 20:08:28,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 76. [2018-01-24 20:08:28,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2018-01-24 20:08:28,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 80 transitions. [2018-01-24 20:08:28,833 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 80 transitions. Word has length 33 [2018-01-24 20:08:28,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 20:08:28,834 INFO L432 AbstractCegarLoop]: Abstraction has 76 states and 80 transitions. [2018-01-24 20:08:28,834 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-24 20:08:28,834 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 80 transitions. [2018-01-24 20:08:28,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-01-24 20:08:28,835 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 20:08:28,835 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 20:08:28,836 INFO L371 AbstractCegarLoop]: === Iteration 11 === [mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr0RequiresViolation, mainErr21RequiresViolation, mainErr3RequiresViolation, mainErr15RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr1RequiresViolation, mainErr17RequiresViolation, mainErr9RequiresViolation, mainErr26EnsuresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr11RequiresViolation, mainErr24RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr4RequiresViolation, mainErr14RequiresViolation, appendErr0RequiresViolation, appendErr9RequiresViolation, appendErr13RequiresViolation, appendErr4RequiresViolation, appendErr8RequiresViolation, appendErr10RequiresViolation, appendErr5RequiresViolation, appendErr12RequiresViolation, appendErr11RequiresViolation, appendErr7RequiresViolation, appendErr3RequiresViolation, appendErr2RequiresViolation, appendErr1RequiresViolation, appendErr6RequiresViolation]=== [2018-01-24 20:08:28,836 INFO L82 PathProgramCache]: Analyzing trace with hash -1517792313, now seen corresponding path program 1 times [2018-01-24 20:08:28,836 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 20:08:28,837 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:08:28,837 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 20:08:28,837 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:08:28,837 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 20:08:28,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 20:08:28,851 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 20:08:29,081 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 20:08:29,081 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 20:08:29,081 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2018-01-24 20:08:29,081 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 20:08:29,082 INFO L409 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-01-24 20:08:29,082 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-01-24 20:08:29,082 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2018-01-24 20:08:29,082 INFO L87 Difference]: Start difference. First operand 76 states and 80 transitions. Second operand 8 states. [2018-01-24 20:08:29,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 20:08:29,196 INFO L93 Difference]: Finished difference Result 79 states and 83 transitions. [2018-01-24 20:08:29,196 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-01-24 20:08:29,196 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 33 [2018-01-24 20:08:29,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 20:08:29,198 INFO L225 Difference]: With dead ends: 79 [2018-01-24 20:08:29,198 INFO L226 Difference]: Without dead ends: 78 [2018-01-24 20:08:29,198 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2018-01-24 20:08:29,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2018-01-24 20:08:29,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 75. [2018-01-24 20:08:29,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-01-24 20:08:29,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 79 transitions. [2018-01-24 20:08:29,203 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 79 transitions. Word has length 33 [2018-01-24 20:08:29,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 20:08:29,203 INFO L432 AbstractCegarLoop]: Abstraction has 75 states and 79 transitions. [2018-01-24 20:08:29,203 INFO L433 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-01-24 20:08:29,203 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 79 transitions. [2018-01-24 20:08:29,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-01-24 20:08:29,204 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 20:08:29,204 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 20:08:29,204 INFO L371 AbstractCegarLoop]: === Iteration 12 === [mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr0RequiresViolation, mainErr21RequiresViolation, mainErr3RequiresViolation, mainErr15RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr1RequiresViolation, mainErr17RequiresViolation, mainErr9RequiresViolation, mainErr26EnsuresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr11RequiresViolation, mainErr24RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr4RequiresViolation, mainErr14RequiresViolation, appendErr0RequiresViolation, appendErr9RequiresViolation, appendErr13RequiresViolation, appendErr4RequiresViolation, appendErr8RequiresViolation, appendErr10RequiresViolation, appendErr5RequiresViolation, appendErr12RequiresViolation, appendErr11RequiresViolation, appendErr7RequiresViolation, appendErr3RequiresViolation, appendErr2RequiresViolation, appendErr1RequiresViolation, appendErr6RequiresViolation]=== [2018-01-24 20:08:29,204 INFO L82 PathProgramCache]: Analyzing trace with hash -1517792312, now seen corresponding path program 1 times [2018-01-24 20:08:29,204 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 20:08:29,205 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:08:29,205 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 20:08:29,205 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:08:29,205 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 20:08:29,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 20:08:29,219 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 20:08:29,249 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 20:08:29,249 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 20:08:29,250 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-01-24 20:08:29,250 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 20:08:29,250 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-24 20:08:29,250 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-24 20:08:29,250 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-01-24 20:08:29,251 INFO L87 Difference]: Start difference. First operand 75 states and 79 transitions. Second operand 5 states. [2018-01-24 20:08:29,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 20:08:29,337 INFO L93 Difference]: Finished difference Result 75 states and 79 transitions. [2018-01-24 20:08:29,337 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-01-24 20:08:29,338 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 33 [2018-01-24 20:08:29,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 20:08:29,338 INFO L225 Difference]: With dead ends: 75 [2018-01-24 20:08:29,338 INFO L226 Difference]: Without dead ends: 74 [2018-01-24 20:08:29,339 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2018-01-24 20:08:29,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2018-01-24 20:08:29,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2018-01-24 20:08:29,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2018-01-24 20:08:29,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 78 transitions. [2018-01-24 20:08:29,344 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 78 transitions. Word has length 33 [2018-01-24 20:08:29,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 20:08:29,344 INFO L432 AbstractCegarLoop]: Abstraction has 74 states and 78 transitions. [2018-01-24 20:08:29,344 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-24 20:08:29,344 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 78 transitions. [2018-01-24 20:08:29,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-01-24 20:08:29,346 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 20:08:29,346 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 20:08:29,346 INFO L371 AbstractCegarLoop]: === Iteration 13 === [mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr0RequiresViolation, mainErr21RequiresViolation, mainErr3RequiresViolation, mainErr15RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr1RequiresViolation, mainErr17RequiresViolation, mainErr9RequiresViolation, mainErr26EnsuresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr11RequiresViolation, mainErr24RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr4RequiresViolation, mainErr14RequiresViolation, appendErr0RequiresViolation, appendErr9RequiresViolation, appendErr13RequiresViolation, appendErr4RequiresViolation, appendErr8RequiresViolation, appendErr10RequiresViolation, appendErr5RequiresViolation, appendErr12RequiresViolation, appendErr11RequiresViolation, appendErr7RequiresViolation, appendErr3RequiresViolation, appendErr2RequiresViolation, appendErr1RequiresViolation, appendErr6RequiresViolation]=== [2018-01-24 20:08:29,346 INFO L82 PathProgramCache]: Analyzing trace with hash -881792853, now seen corresponding path program 1 times [2018-01-24 20:08:29,346 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 20:08:29,347 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:08:29,347 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 20:08:29,347 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:08:29,348 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 20:08:29,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 20:08:29,362 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 20:08:29,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 20:08:29,460 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 20:08:29,461 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2018-01-24 20:08:29,461 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 20:08:29,461 INFO L409 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-01-24 20:08:29,461 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-01-24 20:08:29,461 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2018-01-24 20:08:29,462 INFO L87 Difference]: Start difference. First operand 74 states and 78 transitions. Second operand 8 states. [2018-01-24 20:08:29,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 20:08:29,557 INFO L93 Difference]: Finished difference Result 79 states and 82 transitions. [2018-01-24 20:08:29,557 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-01-24 20:08:29,557 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 35 [2018-01-24 20:08:29,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 20:08:29,558 INFO L225 Difference]: With dead ends: 79 [2018-01-24 20:08:29,558 INFO L226 Difference]: Without dead ends: 71 [2018-01-24 20:08:29,558 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2018-01-24 20:08:29,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-01-24 20:08:29,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2018-01-24 20:08:29,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-01-24 20:08:29,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 74 transitions. [2018-01-24 20:08:29,561 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 74 transitions. Word has length 35 [2018-01-24 20:08:29,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 20:08:29,562 INFO L432 AbstractCegarLoop]: Abstraction has 71 states and 74 transitions. [2018-01-24 20:08:29,562 INFO L433 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-01-24 20:08:29,562 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 74 transitions. [2018-01-24 20:08:29,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-01-24 20:08:29,562 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 20:08:29,563 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 20:08:29,563 INFO L371 AbstractCegarLoop]: === Iteration 14 === [mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr0RequiresViolation, mainErr21RequiresViolation, mainErr3RequiresViolation, mainErr15RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr1RequiresViolation, mainErr17RequiresViolation, mainErr9RequiresViolation, mainErr26EnsuresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr11RequiresViolation, mainErr24RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr4RequiresViolation, mainErr14RequiresViolation, appendErr0RequiresViolation, appendErr9RequiresViolation, appendErr13RequiresViolation, appendErr4RequiresViolation, appendErr8RequiresViolation, appendErr10RequiresViolation, appendErr5RequiresViolation, appendErr12RequiresViolation, appendErr11RequiresViolation, appendErr7RequiresViolation, appendErr3RequiresViolation, appendErr2RequiresViolation, appendErr1RequiresViolation, appendErr6RequiresViolation]=== [2018-01-24 20:08:29,563 INFO L82 PathProgramCache]: Analyzing trace with hash 1690468264, now seen corresponding path program 1 times [2018-01-24 20:08:29,563 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 20:08:29,564 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:08:29,564 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 20:08:29,564 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:08:29,564 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 20:08:29,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 20:08:29,579 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 20:08:29,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 20:08:29,751 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 20:08:29,751 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2018-01-24 20:08:29,751 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 20:08:29,752 INFO L409 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-01-24 20:08:29,752 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-01-24 20:08:29,752 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2018-01-24 20:08:29,753 INFO L87 Difference]: Start difference. First operand 71 states and 74 transitions. Second operand 12 states. [2018-01-24 20:08:30,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 20:08:30,011 INFO L93 Difference]: Finished difference Result 71 states and 74 transitions. [2018-01-24 20:08:30,011 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-01-24 20:08:30,011 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 35 [2018-01-24 20:08:30,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 20:08:30,012 INFO L225 Difference]: With dead ends: 71 [2018-01-24 20:08:30,012 INFO L226 Difference]: Without dead ends: 70 [2018-01-24 20:08:30,013 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2018-01-24 20:08:30,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2018-01-24 20:08:30,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2018-01-24 20:08:30,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2018-01-24 20:08:30,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 73 transitions. [2018-01-24 20:08:30,017 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 73 transitions. Word has length 35 [2018-01-24 20:08:30,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 20:08:30,018 INFO L432 AbstractCegarLoop]: Abstraction has 70 states and 73 transitions. [2018-01-24 20:08:30,018 INFO L433 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-01-24 20:08:30,018 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 73 transitions. [2018-01-24 20:08:30,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-01-24 20:08:30,019 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 20:08:30,019 INFO L322 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 20:08:30,019 INFO L371 AbstractCegarLoop]: === Iteration 15 === [mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr0RequiresViolation, mainErr21RequiresViolation, mainErr3RequiresViolation, mainErr15RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr1RequiresViolation, mainErr17RequiresViolation, mainErr9RequiresViolation, mainErr26EnsuresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr11RequiresViolation, mainErr24RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr4RequiresViolation, mainErr14RequiresViolation, appendErr0RequiresViolation, appendErr9RequiresViolation, appendErr13RequiresViolation, appendErr4RequiresViolation, appendErr8RequiresViolation, appendErr10RequiresViolation, appendErr5RequiresViolation, appendErr12RequiresViolation, appendErr11RequiresViolation, appendErr7RequiresViolation, appendErr3RequiresViolation, appendErr2RequiresViolation, appendErr1RequiresViolation, appendErr6RequiresViolation]=== [2018-01-24 20:08:30,019 INFO L82 PathProgramCache]: Analyzing trace with hash 403683132, now seen corresponding path program 1 times [2018-01-24 20:08:30,019 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 20:08:30,020 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:08:30,020 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 20:08:30,020 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:08:30,020 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 20:08:30,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 20:08:30,032 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 20:08:30,181 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 20:08:30,181 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-24 20:08:30,181 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-24 20:08:30,182 INFO L199 CegarAbsIntRunner]: Running AI on error trace of length 39 with the following transitions: [2018-01-24 20:08:30,183 INFO L201 CegarAbsIntRunner]: [0], [1], [5], [6], [12], [15], [20], [87], [88], [89], [90], [93], [96], [97], [102], [103], [107], [111], [112], [113], [115], [118], [119], [122], [123], [124], [125], [127], [128] [2018-01-24 20:08:30,227 INFO L147 AbstractInterpreter]: Using domain VPDomain [2018-01-24 20:08:30,227 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