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_preciseopt.epf -i ../../../trunk/examples/svcomp/heap-manipulation/merge_sort_true-unreach-call_true-valid-memsafety.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-6b94a2f [2018-01-25 03:39:10,922 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-25 03:39:10,924 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-25 03:39:10,942 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-25 03:39:10,943 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-25 03:39:10,944 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-25 03:39:10,946 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-25 03:39:10,950 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-25 03:39:10,952 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-25 03:39:10,954 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-25 03:39:10,955 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-01-25 03:39:10,955 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-01-25 03:39:10,957 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-01-25 03:39:10,958 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-01-25 03:39:10,959 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-01-25 03:39:10,962 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-01-25 03:39:10,965 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-01-25 03:39:10,967 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-01-25 03:39:10,969 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-01-25 03:39:10,970 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-01-25 03:39:10,973 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-01-25 03:39:10,973 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-01-25 03:39:10,973 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-01-25 03:39:10,975 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-01-25 03:39:10,976 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-01-25 03:39:10,977 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-01-25 03:39:10,977 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-01-25 03:39:10,978 INFO L177 SettingsManager]: PEA to Boogie provides no preferences, ignoring... [2018-01-25 03:39:10,979 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-01-25 03:39:10,979 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-01-25 03:39:10,980 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-01-25 03:39:10,980 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_preciseopt.epf [2018-01-25 03:39:10,992 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-25 03:39:10,993 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-25 03:39:10,993 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-25 03:39:10,994 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-25 03:39:10,994 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-25 03:39:10,994 INFO L133 SettingsManager]: * Weq Fattening=true [2018-01-25 03:39:10,994 INFO L133 SettingsManager]: * Flatten before fatten=true [2018-01-25 03:39:10,994 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-25 03:39:10,995 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-25 03:39:10,995 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-25 03:39:10,996 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-25 03:39:10,996 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-25 03:39:10,996 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-25 03:39:10,996 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-25 03:39:10,996 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-25 03:39:10,997 INFO L133 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2018-01-25 03:39:10,997 INFO L133 SettingsManager]: * Bitprecise bitfields=true [2018-01-25 03:39:10,997 INFO L133 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2018-01-25 03:39:10,997 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-25 03:39:10,997 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-25 03:39:10,998 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-25 03:39:10,998 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-01-25 03:39:10,998 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-25 03:39:10,998 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-25 03:39:10,999 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-25 03:39:10,999 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-25 03:39:10,999 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-25 03:39:10,999 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-25 03:39:10,999 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-25 03:39:11,000 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-25 03:39:11,000 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-01-25 03:39:11,000 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-25 03:39:11,000 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-25 03:39:11,000 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-25 03:39:11,001 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-01-25 03:39:11,002 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-25 03:39:11,002 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-25 03:39:11,055 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-25 03:39:11,077 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-25 03:39:11,082 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-25 03:39:11,084 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-25 03:39:11,085 INFO L276 PluginConnector]: CDTParser initialized [2018-01-25 03:39:11,085 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/heap-manipulation/merge_sort_true-unreach-call_true-valid-memsafety.i [2018-01-25 03:39:11,300 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-25 03:39:11,307 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-25 03:39:11,308 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-25 03:39:11,309 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-25 03:39:11,316 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-25 03:39:11,317 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.01 03:39:11" (1/1) ... [2018-01-25 03:39:11,321 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d2bd86f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.01 03:39:11, skipping insertion in model container [2018-01-25 03:39:11,321 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.01 03:39:11" (1/1) ... [2018-01-25 03:39:11,341 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-25 03:39:11,397 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-25 03:39:11,535 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-25 03:39:11,567 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-25 03:39:11,585 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.01 03:39:11 WrapperNode [2018-01-25 03:39:11,585 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-25 03:39:11,586 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-25 03:39:11,586 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-25 03:39:11,587 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-25 03:39:11,600 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.01 03:39:11" (1/1) ... [2018-01-25 03:39:11,601 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.01 03:39:11" (1/1) ... [2018-01-25 03:39:11,615 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.01 03:39:11" (1/1) ... [2018-01-25 03:39:11,615 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.01 03:39:11" (1/1) ... [2018-01-25 03:39:11,626 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.01 03:39:11" (1/1) ... [2018-01-25 03:39:11,634 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.01 03:39:11" (1/1) ... [2018-01-25 03:39:11,637 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.01 03:39:11" (1/1) ... [2018-01-25 03:39:11,641 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-25 03:39:11,642 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-25 03:39:11,642 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-25 03:39:11,642 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-25 03:39:11,643 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.01 03:39:11" (1/1) ... No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-25 03:39:11,718 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-25 03:39:11,718 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-25 03:39:11,718 INFO L136 BoogieDeclarations]: Found implementation of procedure fail [2018-01-25 03:39:11,719 INFO L136 BoogieDeclarations]: Found implementation of procedure merge_single_node [2018-01-25 03:39:11,719 INFO L136 BoogieDeclarations]: Found implementation of procedure merge_pair [2018-01-25 03:39:11,719 INFO L136 BoogieDeclarations]: Found implementation of procedure seq_sort_core [2018-01-25 03:39:11,719 INFO L136 BoogieDeclarations]: Found implementation of procedure inspect_before [2018-01-25 03:39:11,719 INFO L136 BoogieDeclarations]: Found implementation of procedure inspect_after [2018-01-25 03:39:11,719 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-25 03:39:11,720 INFO L128 BoogieDeclarations]: Found specification of procedure write~int [2018-01-25 03:39:11,720 INFO L128 BoogieDeclarations]: Found specification of procedure read~int [2018-01-25 03:39:11,720 INFO L128 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2018-01-25 03:39:11,720 INFO L128 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2018-01-25 03:39:11,720 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-01-25 03:39:11,720 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-01-25 03:39:11,720 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-01-25 03:39:11,721 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2018-01-25 03:39:11,721 INFO L128 BoogieDeclarations]: Found specification of procedure free [2018-01-25 03:39:11,721 INFO L128 BoogieDeclarations]: Found specification of procedure abort [2018-01-25 03:39:11,721 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-01-25 03:39:11,721 INFO L128 BoogieDeclarations]: Found specification of procedure fail [2018-01-25 03:39:11,721 INFO L128 BoogieDeclarations]: Found specification of procedure merge_single_node [2018-01-25 03:39:11,722 INFO L128 BoogieDeclarations]: Found specification of procedure merge_pair [2018-01-25 03:39:11,722 INFO L128 BoogieDeclarations]: Found specification of procedure seq_sort_core [2018-01-25 03:39:11,722 INFO L128 BoogieDeclarations]: Found specification of procedure inspect_before [2018-01-25 03:39:11,722 INFO L128 BoogieDeclarations]: Found specification of procedure inspect_after [2018-01-25 03:39:11,722 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-25 03:39:11,722 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-25 03:39:11,723 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-25 03:39:12,924 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-25 03:39:12,924 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.01 03:39:12 BoogieIcfgContainer [2018-01-25 03:39:12,924 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-25 03:39:12,925 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-01-25 03:39:12,925 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-01-25 03:39:12,928 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-01-25 03:39:12,928 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.01 03:39:11" (1/3) ... [2018-01-25 03:39:12,929 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1dec07b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.01 03:39:12, skipping insertion in model container [2018-01-25 03:39:12,929 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.01 03:39:11" (2/3) ... [2018-01-25 03:39:12,930 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1dec07b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.01 03:39:12, skipping insertion in model container [2018-01-25 03:39:12,930 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.01 03:39:12" (3/3) ... [2018-01-25 03:39:12,932 INFO L105 eAbstractionObserver]: Analyzing ICFG merge_sort_true-unreach-call_true-valid-memsafety.i [2018-01-25 03:39:12,941 INFO L130 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-01-25 03:39:12,950 INFO L142 ceAbstractionStarter]: Appying trace abstraction to program that has 109 error locations. [2018-01-25 03:39:13,011 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-25 03:39:13,011 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-25 03:39:13,011 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-25 03:39:13,011 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-25 03:39:13,011 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-25 03:39:13,012 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-25 03:39:13,012 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-25 03:39:13,012 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-01-25 03:39:13,013 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-25 03:39:13,059 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states. [2018-01-25 03:39:13,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-01-25 03:39:13,070 INFO L314 BasicCegarLoop]: Found error trace [2018-01-25 03:39:13,072 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-25 03:39:13,072 INFO L371 AbstractCegarLoop]: === Iteration 1 === [merge_pairErr19RequiresViolation, merge_pairErr24RequiresViolation, merge_pairErr4RequiresViolation, merge_pairErr11RequiresViolation, merge_pairErr16RequiresViolation, merge_pairErr7RequiresViolation, merge_pairErr9RequiresViolation, merge_pairErr2RequiresViolation, merge_pairErr14RequiresViolation, merge_pairErr29RequiresViolation, merge_pairErr17RequiresViolation, merge_pairErr6RequiresViolation, merge_pairErr27RequiresViolation, merge_pairErr26RequiresViolation, merge_pairErr3RequiresViolation, merge_pairErr13RequiresViolation, merge_pairErr23RequiresViolation, merge_pairErr15RequiresViolation, merge_pairErr0RequiresViolation, merge_pairErr10RequiresViolation, merge_pairErr25RequiresViolation, merge_pairErr20RequiresViolation, merge_pairErr22RequiresViolation, merge_pairErr12RequiresViolation, merge_pairErr5RequiresViolation, merge_pairErr18RequiresViolation, merge_pairErr21RequiresViolation, merge_pairErr1RequiresViolation, merge_pairErr28RequiresViolation, merge_pairErr8RequiresViolation, merge_single_nodeErr4RequiresViolation, merge_single_nodeErr0RequiresViolation, merge_single_nodeErr9RequiresViolation, merge_single_nodeErr7RequiresViolation, merge_single_nodeErr11RequiresViolation, merge_single_nodeErr2RequiresViolation, merge_single_nodeErr1RequiresViolation, merge_single_nodeErr13RequiresViolation, merge_single_nodeErr6RequiresViolation, merge_single_nodeErr5RequiresViolation, merge_single_nodeErr10RequiresViolation, merge_single_nodeErr3RequiresViolation, merge_single_nodeErr12RequiresViolation, merge_single_nodeErr8RequiresViolation, seq_sort_coreErr13RequiresViolation, seq_sort_coreErr7RequiresViolation, seq_sort_coreErr6RequiresViolation, seq_sort_coreErr10RequiresViolation, seq_sort_coreErr1RequiresViolation, seq_sort_coreErr3RequiresViolation, seq_sort_coreErr8RequiresViolation, seq_sort_coreErr12RequiresViolation, seq_sort_coreErr11RequiresViolation, seq_sort_coreErr0RequiresViolation, seq_sort_coreErr4RequiresViolation, seq_sort_coreErr5RequiresViolation, seq_sort_coreErr2RequiresViolation, seq_sort_coreErr9RequiresViolation, inspect_beforeErr15RequiresViolation, inspect_beforeErr7RequiresViolation, inspect_beforeErr11RequiresViolation, inspect_beforeErr3RequiresViolation, inspect_beforeErr2RequiresViolation, inspect_beforeErr10RequiresViolation, inspect_beforeErr16RequiresViolation, inspect_beforeErr1RequiresViolation, inspect_beforeErr6RequiresViolation, inspect_beforeErr18RequiresViolation, inspect_beforeErr13RequiresViolation, inspect_beforeErr0RequiresViolation, inspect_beforeErr9RequiresViolation, inspect_beforeErr4RequiresViolation, inspect_beforeErr17RequiresViolation, inspect_beforeErr8RequiresViolation, inspect_beforeErr12RequiresViolation, inspect_beforeErr14RequiresViolation, inspect_beforeErr5RequiresViolation, inspect_beforeErr19RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr1RequiresViolation, mainErr17RequiresViolation, mainErr9RequiresViolation, mainErr18EnsuresViolation, mainErr0RequiresViolation, mainErr3RequiresViolation, mainErr7RequiresViolation, mainErr11RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr15RequiresViolation, mainErr16RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr14RequiresViolation, inspect_afterErr8RequiresViolation, inspect_afterErr10RequiresViolation, inspect_afterErr1RequiresViolation, inspect_afterErr0RequiresViolation, inspect_afterErr6RequiresViolation, inspect_afterErr7RequiresViolation, inspect_afterErr11RequiresViolation, inspect_afterErr5RequiresViolation, inspect_afterErr2RequiresViolation, inspect_afterErr4RequiresViolation, inspect_afterErr3RequiresViolation, inspect_afterErr9RequiresViolation]=== [2018-01-25 03:39:13,078 INFO L82 PathProgramCache]: Analyzing trace with hash 1556477250, now seen corresponding path program 1 times [2018-01-25 03:39:13,081 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-25 03:39:13,147 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 03:39:13,147 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-25 03:39:13,147 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 03:39:13,147 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-25 03:39:13,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-25 03:39:13,233 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-25 03:39:13,268 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-25 03:39:13,271 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-25 03:39:13,271 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-25 03:39:13,272 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-25 03:39:13,420 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-25 03:39:13,437 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-25 03:39:13,437 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-25 03:39:13,440 INFO L87 Difference]: Start difference. First operand 315 states. Second operand 2 states. [2018-01-25 03:39:13,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-25 03:39:13,500 INFO L93 Difference]: Finished difference Result 622 states and 773 transitions. [2018-01-25 03:39:13,500 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-25 03:39:13,502 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 9 [2018-01-25 03:39:13,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-25 03:39:13,519 INFO L225 Difference]: With dead ends: 622 [2018-01-25 03:39:13,519 INFO L226 Difference]: Without dead ends: 296 [2018-01-25 03:39:13,526 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-25 03:39:13,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2018-01-25 03:39:13,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 296. [2018-01-25 03:39:13,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 296 states. [2018-01-25 03:39:13,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 309 transitions. [2018-01-25 03:39:13,595 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 309 transitions. Word has length 9 [2018-01-25 03:39:13,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-25 03:39:13,595 INFO L432 AbstractCegarLoop]: Abstraction has 296 states and 309 transitions. [2018-01-25 03:39:13,595 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-25 03:39:13,595 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 309 transitions. [2018-01-25 03:39:13,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-01-25 03:39:13,596 INFO L314 BasicCegarLoop]: Found error trace [2018-01-25 03:39:13,596 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-25 03:39:13,596 INFO L371 AbstractCegarLoop]: === Iteration 2 === [merge_pairErr19RequiresViolation, merge_pairErr24RequiresViolation, merge_pairErr4RequiresViolation, merge_pairErr11RequiresViolation, merge_pairErr16RequiresViolation, merge_pairErr7RequiresViolation, merge_pairErr9RequiresViolation, merge_pairErr2RequiresViolation, merge_pairErr14RequiresViolation, merge_pairErr29RequiresViolation, merge_pairErr17RequiresViolation, merge_pairErr6RequiresViolation, merge_pairErr27RequiresViolation, merge_pairErr26RequiresViolation, merge_pairErr3RequiresViolation, merge_pairErr13RequiresViolation, merge_pairErr23RequiresViolation, merge_pairErr15RequiresViolation, merge_pairErr0RequiresViolation, merge_pairErr10RequiresViolation, merge_pairErr25RequiresViolation, merge_pairErr20RequiresViolation, merge_pairErr22RequiresViolation, merge_pairErr12RequiresViolation, merge_pairErr5RequiresViolation, merge_pairErr18RequiresViolation, merge_pairErr21RequiresViolation, merge_pairErr1RequiresViolation, merge_pairErr28RequiresViolation, merge_pairErr8RequiresViolation, merge_single_nodeErr4RequiresViolation, merge_single_nodeErr0RequiresViolation, merge_single_nodeErr9RequiresViolation, merge_single_nodeErr7RequiresViolation, merge_single_nodeErr11RequiresViolation, merge_single_nodeErr2RequiresViolation, merge_single_nodeErr1RequiresViolation, merge_single_nodeErr13RequiresViolation, merge_single_nodeErr6RequiresViolation, merge_single_nodeErr5RequiresViolation, merge_single_nodeErr10RequiresViolation, merge_single_nodeErr3RequiresViolation, merge_single_nodeErr12RequiresViolation, merge_single_nodeErr8RequiresViolation, seq_sort_coreErr13RequiresViolation, seq_sort_coreErr7RequiresViolation, seq_sort_coreErr6RequiresViolation, seq_sort_coreErr10RequiresViolation, seq_sort_coreErr1RequiresViolation, seq_sort_coreErr3RequiresViolation, seq_sort_coreErr8RequiresViolation, seq_sort_coreErr12RequiresViolation, seq_sort_coreErr11RequiresViolation, seq_sort_coreErr0RequiresViolation, seq_sort_coreErr4RequiresViolation, seq_sort_coreErr5RequiresViolation, seq_sort_coreErr2RequiresViolation, seq_sort_coreErr9RequiresViolation, inspect_beforeErr15RequiresViolation, inspect_beforeErr7RequiresViolation, inspect_beforeErr11RequiresViolation, inspect_beforeErr3RequiresViolation, inspect_beforeErr2RequiresViolation, inspect_beforeErr10RequiresViolation, inspect_beforeErr16RequiresViolation, inspect_beforeErr1RequiresViolation, inspect_beforeErr6RequiresViolation, inspect_beforeErr18RequiresViolation, inspect_beforeErr13RequiresViolation, inspect_beforeErr0RequiresViolation, inspect_beforeErr9RequiresViolation, inspect_beforeErr4RequiresViolation, inspect_beforeErr17RequiresViolation, inspect_beforeErr8RequiresViolation, inspect_beforeErr12RequiresViolation, inspect_beforeErr14RequiresViolation, inspect_beforeErr5RequiresViolation, inspect_beforeErr19RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr1RequiresViolation, mainErr17RequiresViolation, mainErr9RequiresViolation, mainErr18EnsuresViolation, mainErr0RequiresViolation, mainErr3RequiresViolation, mainErr7RequiresViolation, mainErr11RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr15RequiresViolation, mainErr16RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr14RequiresViolation, inspect_afterErr8RequiresViolation, inspect_afterErr10RequiresViolation, inspect_afterErr1RequiresViolation, inspect_afterErr0RequiresViolation, inspect_afterErr6RequiresViolation, inspect_afterErr7RequiresViolation, inspect_afterErr11RequiresViolation, inspect_afterErr5RequiresViolation, inspect_afterErr2RequiresViolation, inspect_afterErr4RequiresViolation, inspect_afterErr3RequiresViolation, inspect_afterErr9RequiresViolation]=== [2018-01-25 03:39:13,597 INFO L82 PathProgramCache]: Analyzing trace with hash 1087749341, now seen corresponding path program 1 times [2018-01-25 03:39:13,597 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-25 03:39:13,598 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 03:39:13,598 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-25 03:39:13,598 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 03:39:13,599 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-25 03:39:13,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-25 03:39:13,626 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-25 03:39:13,689 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-25 03:39:13,690 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-25 03:39:13,690 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-25 03:39:13,690 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-25 03:39:13,691 INFO L409 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-01-25 03:39:13,692 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-01-25 03:39:13,692 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-01-25 03:39:13,692 INFO L87 Difference]: Start difference. First operand 296 states and 309 transitions. Second operand 3 states. [2018-01-25 03:39:14,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-25 03:39:14,214 INFO L93 Difference]: Finished difference Result 340 states and 362 transitions. [2018-01-25 03:39:14,215 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-01-25 03:39:14,215 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2018-01-25 03:39:14,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-25 03:39:14,218 INFO L225 Difference]: With dead ends: 340 [2018-01-25 03:39:14,219 INFO L226 Difference]: Without dead ends: 338 [2018-01-25 03:39:14,220 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 [2018-01-25 03:39:14,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2018-01-25 03:39:14,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 300. [2018-01-25 03:39:14,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 300 states. [2018-01-25 03:39:14,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 314 transitions. [2018-01-25 03:39:14,253 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 314 transitions. Word has length 11 [2018-01-25 03:39:14,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-25 03:39:14,254 INFO L432 AbstractCegarLoop]: Abstraction has 300 states and 314 transitions. [2018-01-25 03:39:14,254 INFO L433 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-01-25 03:39:14,254 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 314 transitions. [2018-01-25 03:39:14,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-01-25 03:39:14,255 INFO L314 BasicCegarLoop]: Found error trace [2018-01-25 03:39:14,255 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-25 03:39:14,255 INFO L371 AbstractCegarLoop]: === Iteration 3 === [merge_pairErr19RequiresViolation, merge_pairErr24RequiresViolation, merge_pairErr4RequiresViolation, merge_pairErr11RequiresViolation, merge_pairErr16RequiresViolation, merge_pairErr7RequiresViolation, merge_pairErr9RequiresViolation, merge_pairErr2RequiresViolation, merge_pairErr14RequiresViolation, merge_pairErr29RequiresViolation, merge_pairErr17RequiresViolation, merge_pairErr6RequiresViolation, merge_pairErr27RequiresViolation, merge_pairErr26RequiresViolation, merge_pairErr3RequiresViolation, merge_pairErr13RequiresViolation, merge_pairErr23RequiresViolation, merge_pairErr15RequiresViolation, merge_pairErr0RequiresViolation, merge_pairErr10RequiresViolation, merge_pairErr25RequiresViolation, merge_pairErr20RequiresViolation, merge_pairErr22RequiresViolation, merge_pairErr12RequiresViolation, merge_pairErr5RequiresViolation, merge_pairErr18RequiresViolation, merge_pairErr21RequiresViolation, merge_pairErr1RequiresViolation, merge_pairErr28RequiresViolation, merge_pairErr8RequiresViolation, merge_single_nodeErr4RequiresViolation, merge_single_nodeErr0RequiresViolation, merge_single_nodeErr9RequiresViolation, merge_single_nodeErr7RequiresViolation, merge_single_nodeErr11RequiresViolation, merge_single_nodeErr2RequiresViolation, merge_single_nodeErr1RequiresViolation, merge_single_nodeErr13RequiresViolation, merge_single_nodeErr6RequiresViolation, merge_single_nodeErr5RequiresViolation, merge_single_nodeErr10RequiresViolation, merge_single_nodeErr3RequiresViolation, merge_single_nodeErr12RequiresViolation, merge_single_nodeErr8RequiresViolation, seq_sort_coreErr13RequiresViolation, seq_sort_coreErr7RequiresViolation, seq_sort_coreErr6RequiresViolation, seq_sort_coreErr10RequiresViolation, seq_sort_coreErr1RequiresViolation, seq_sort_coreErr3RequiresViolation, seq_sort_coreErr8RequiresViolation, seq_sort_coreErr12RequiresViolation, seq_sort_coreErr11RequiresViolation, seq_sort_coreErr0RequiresViolation, seq_sort_coreErr4RequiresViolation, seq_sort_coreErr5RequiresViolation, seq_sort_coreErr2RequiresViolation, seq_sort_coreErr9RequiresViolation, inspect_beforeErr15RequiresViolation, inspect_beforeErr7RequiresViolation, inspect_beforeErr11RequiresViolation, inspect_beforeErr3RequiresViolation, inspect_beforeErr2RequiresViolation, inspect_beforeErr10RequiresViolation, inspect_beforeErr16RequiresViolation, inspect_beforeErr1RequiresViolation, inspect_beforeErr6RequiresViolation, inspect_beforeErr18RequiresViolation, inspect_beforeErr13RequiresViolation, inspect_beforeErr0RequiresViolation, inspect_beforeErr9RequiresViolation, inspect_beforeErr4RequiresViolation, inspect_beforeErr17RequiresViolation, inspect_beforeErr8RequiresViolation, inspect_beforeErr12RequiresViolation, inspect_beforeErr14RequiresViolation, inspect_beforeErr5RequiresViolation, inspect_beforeErr19RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr1RequiresViolation, mainErr17RequiresViolation, mainErr9RequiresViolation, mainErr18EnsuresViolation, mainErr0RequiresViolation, mainErr3RequiresViolation, mainErr7RequiresViolation, mainErr11RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr15RequiresViolation, mainErr16RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr14RequiresViolation, inspect_afterErr8RequiresViolation, inspect_afterErr10RequiresViolation, inspect_afterErr1RequiresViolation, inspect_afterErr0RequiresViolation, inspect_afterErr6RequiresViolation, inspect_afterErr7RequiresViolation, inspect_afterErr11RequiresViolation, inspect_afterErr5RequiresViolation, inspect_afterErr2RequiresViolation, inspect_afterErr4RequiresViolation, inspect_afterErr3RequiresViolation, inspect_afterErr9RequiresViolation]=== [2018-01-25 03:39:14,255 INFO L82 PathProgramCache]: Analyzing trace with hash 1650764336, now seen corresponding path program 1 times [2018-01-25 03:39:14,255 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-25 03:39:14,257 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 03:39:14,257 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-25 03:39:14,257 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 03:39:14,257 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-25 03:39:14,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-25 03:39:14,280 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-25 03:39:14,355 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-25 03:39:14,355 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-25 03:39:14,356 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-25 03:39:14,356 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-25 03:39:14,356 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-25 03:39:14,356 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-25 03:39:14,356 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-25 03:39:14,356 INFO L87 Difference]: Start difference. First operand 300 states and 314 transitions. Second operand 4 states. [2018-01-25 03:39:14,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-25 03:39:14,710 INFO L93 Difference]: Finished difference Result 330 states and 348 transitions. [2018-01-25 03:39:14,710 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-01-25 03:39:14,711 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2018-01-25 03:39:14,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-25 03:39:14,712 INFO L225 Difference]: With dead ends: 330 [2018-01-25 03:39:14,712 INFO L226 Difference]: Without dead ends: 328 [2018-01-25 03:39:14,713 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-01-25 03:39:14,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2018-01-25 03:39:14,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 298. [2018-01-25 03:39:14,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 298 states. [2018-01-25 03:39:14,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 312 transitions. [2018-01-25 03:39:14,739 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 312 transitions. Word has length 13 [2018-01-25 03:39:14,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-25 03:39:14,739 INFO L432 AbstractCegarLoop]: Abstraction has 298 states and 312 transitions. [2018-01-25 03:39:14,739 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-25 03:39:14,739 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 312 transitions. [2018-01-25 03:39:14,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-01-25 03:39:14,740 INFO L314 BasicCegarLoop]: Found error trace [2018-01-25 03:39:14,740 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-25 03:39:14,740 INFO L371 AbstractCegarLoop]: === Iteration 4 === [merge_pairErr19RequiresViolation, merge_pairErr24RequiresViolation, merge_pairErr4RequiresViolation, merge_pairErr11RequiresViolation, merge_pairErr16RequiresViolation, merge_pairErr7RequiresViolation, merge_pairErr9RequiresViolation, merge_pairErr2RequiresViolation, merge_pairErr14RequiresViolation, merge_pairErr29RequiresViolation, merge_pairErr17RequiresViolation, merge_pairErr6RequiresViolation, merge_pairErr27RequiresViolation, merge_pairErr26RequiresViolation, merge_pairErr3RequiresViolation, merge_pairErr13RequiresViolation, merge_pairErr23RequiresViolation, merge_pairErr15RequiresViolation, merge_pairErr0RequiresViolation, merge_pairErr10RequiresViolation, merge_pairErr25RequiresViolation, merge_pairErr20RequiresViolation, merge_pairErr22RequiresViolation, merge_pairErr12RequiresViolation, merge_pairErr5RequiresViolation, merge_pairErr18RequiresViolation, merge_pairErr21RequiresViolation, merge_pairErr1RequiresViolation, merge_pairErr28RequiresViolation, merge_pairErr8RequiresViolation, merge_single_nodeErr4RequiresViolation, merge_single_nodeErr0RequiresViolation, merge_single_nodeErr9RequiresViolation, merge_single_nodeErr7RequiresViolation, merge_single_nodeErr11RequiresViolation, merge_single_nodeErr2RequiresViolation, merge_single_nodeErr1RequiresViolation, merge_single_nodeErr13RequiresViolation, merge_single_nodeErr6RequiresViolation, merge_single_nodeErr5RequiresViolation, merge_single_nodeErr10RequiresViolation, merge_single_nodeErr3RequiresViolation, merge_single_nodeErr12RequiresViolation, merge_single_nodeErr8RequiresViolation, seq_sort_coreErr13RequiresViolation, seq_sort_coreErr7RequiresViolation, seq_sort_coreErr6RequiresViolation, seq_sort_coreErr10RequiresViolation, seq_sort_coreErr1RequiresViolation, seq_sort_coreErr3RequiresViolation, seq_sort_coreErr8RequiresViolation, seq_sort_coreErr12RequiresViolation, seq_sort_coreErr11RequiresViolation, seq_sort_coreErr0RequiresViolation, seq_sort_coreErr4RequiresViolation, seq_sort_coreErr5RequiresViolation, seq_sort_coreErr2RequiresViolation, seq_sort_coreErr9RequiresViolation, inspect_beforeErr15RequiresViolation, inspect_beforeErr7RequiresViolation, inspect_beforeErr11RequiresViolation, inspect_beforeErr3RequiresViolation, inspect_beforeErr2RequiresViolation, inspect_beforeErr10RequiresViolation, inspect_beforeErr16RequiresViolation, inspect_beforeErr1RequiresViolation, inspect_beforeErr6RequiresViolation, inspect_beforeErr18RequiresViolation, inspect_beforeErr13RequiresViolation, inspect_beforeErr0RequiresViolation, inspect_beforeErr9RequiresViolation, inspect_beforeErr4RequiresViolation, inspect_beforeErr17RequiresViolation, inspect_beforeErr8RequiresViolation, inspect_beforeErr12RequiresViolation, inspect_beforeErr14RequiresViolation, inspect_beforeErr5RequiresViolation, inspect_beforeErr19RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr1RequiresViolation, mainErr17RequiresViolation, mainErr9RequiresViolation, mainErr18EnsuresViolation, mainErr0RequiresViolation, mainErr3RequiresViolation, mainErr7RequiresViolation, mainErr11RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr15RequiresViolation, mainErr16RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr14RequiresViolation, inspect_afterErr8RequiresViolation, inspect_afterErr10RequiresViolation, inspect_afterErr1RequiresViolation, inspect_afterErr0RequiresViolation, inspect_afterErr6RequiresViolation, inspect_afterErr7RequiresViolation, inspect_afterErr11RequiresViolation, inspect_afterErr5RequiresViolation, inspect_afterErr2RequiresViolation, inspect_afterErr4RequiresViolation, inspect_afterErr3RequiresViolation, inspect_afterErr9RequiresViolation]=== [2018-01-25 03:39:14,740 INFO L82 PathProgramCache]: Analyzing trace with hash 1650764335, now seen corresponding path program 1 times [2018-01-25 03:39:14,741 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-25 03:39:14,742 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 03:39:14,742 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-25 03:39:14,742 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 03:39:14,742 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-25 03:39:14,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-25 03:39:14,751 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-25 03:39:14,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-25 03:39:14,778 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-25 03:39:14,778 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-25 03:39:14,778 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-25 03:39:14,779 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-25 03:39:14,779 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-25 03:39:14,779 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-25 03:39:14,779 INFO L87 Difference]: Start difference. First operand 298 states and 312 transitions. Second operand 4 states. [2018-01-25 03:39:15,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-25 03:39:15,107 INFO L93 Difference]: Finished difference Result 317 states and 334 transitions. [2018-01-25 03:39:15,107 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-01-25 03:39:15,107 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2018-01-25 03:39:15,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-25 03:39:15,109 INFO L225 Difference]: With dead ends: 317 [2018-01-25 03:39:15,109 INFO L226 Difference]: Without dead ends: 315 [2018-01-25 03:39:15,109 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-01-25 03:39:15,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2018-01-25 03:39:15,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 296. [2018-01-25 03:39:15,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 296 states. [2018-01-25 03:39:15,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 310 transitions. [2018-01-25 03:39:15,125 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 310 transitions. Word has length 13 [2018-01-25 03:39:15,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-25 03:39:15,125 INFO L432 AbstractCegarLoop]: Abstraction has 296 states and 310 transitions. [2018-01-25 03:39:15,125 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-25 03:39:15,125 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 310 transitions. [2018-01-25 03:39:15,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-01-25 03:39:15,126 INFO L314 BasicCegarLoop]: Found error trace [2018-01-25 03:39:15,126 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-25 03:39:15,126 INFO L371 AbstractCegarLoop]: === Iteration 5 === [merge_pairErr19RequiresViolation, merge_pairErr24RequiresViolation, merge_pairErr4RequiresViolation, merge_pairErr11RequiresViolation, merge_pairErr16RequiresViolation, merge_pairErr7RequiresViolation, merge_pairErr9RequiresViolation, merge_pairErr2RequiresViolation, merge_pairErr14RequiresViolation, merge_pairErr29RequiresViolation, merge_pairErr17RequiresViolation, merge_pairErr6RequiresViolation, merge_pairErr27RequiresViolation, merge_pairErr26RequiresViolation, merge_pairErr3RequiresViolation, merge_pairErr13RequiresViolation, merge_pairErr23RequiresViolation, merge_pairErr15RequiresViolation, merge_pairErr0RequiresViolation, merge_pairErr10RequiresViolation, merge_pairErr25RequiresViolation, merge_pairErr20RequiresViolation, merge_pairErr22RequiresViolation, merge_pairErr12RequiresViolation, merge_pairErr5RequiresViolation, merge_pairErr18RequiresViolation, merge_pairErr21RequiresViolation, merge_pairErr1RequiresViolation, merge_pairErr28RequiresViolation, merge_pairErr8RequiresViolation, merge_single_nodeErr4RequiresViolation, merge_single_nodeErr0RequiresViolation, merge_single_nodeErr9RequiresViolation, merge_single_nodeErr7RequiresViolation, merge_single_nodeErr11RequiresViolation, merge_single_nodeErr2RequiresViolation, merge_single_nodeErr1RequiresViolation, merge_single_nodeErr13RequiresViolation, merge_single_nodeErr6RequiresViolation, merge_single_nodeErr5RequiresViolation, merge_single_nodeErr10RequiresViolation, merge_single_nodeErr3RequiresViolation, merge_single_nodeErr12RequiresViolation, merge_single_nodeErr8RequiresViolation, seq_sort_coreErr13RequiresViolation, seq_sort_coreErr7RequiresViolation, seq_sort_coreErr6RequiresViolation, seq_sort_coreErr10RequiresViolation, seq_sort_coreErr1RequiresViolation, seq_sort_coreErr3RequiresViolation, seq_sort_coreErr8RequiresViolation, seq_sort_coreErr12RequiresViolation, seq_sort_coreErr11RequiresViolation, seq_sort_coreErr0RequiresViolation, seq_sort_coreErr4RequiresViolation, seq_sort_coreErr5RequiresViolation, seq_sort_coreErr2RequiresViolation, seq_sort_coreErr9RequiresViolation, inspect_beforeErr15RequiresViolation, inspect_beforeErr7RequiresViolation, inspect_beforeErr11RequiresViolation, inspect_beforeErr3RequiresViolation, inspect_beforeErr2RequiresViolation, inspect_beforeErr10RequiresViolation, inspect_beforeErr16RequiresViolation, inspect_beforeErr1RequiresViolation, inspect_beforeErr6RequiresViolation, inspect_beforeErr18RequiresViolation, inspect_beforeErr13RequiresViolation, inspect_beforeErr0RequiresViolation, inspect_beforeErr9RequiresViolation, inspect_beforeErr4RequiresViolation, inspect_beforeErr17RequiresViolation, inspect_beforeErr8RequiresViolation, inspect_beforeErr12RequiresViolation, inspect_beforeErr14RequiresViolation, inspect_beforeErr5RequiresViolation, inspect_beforeErr19RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr1RequiresViolation, mainErr17RequiresViolation, mainErr9RequiresViolation, mainErr18EnsuresViolation, mainErr0RequiresViolation, mainErr3RequiresViolation, mainErr7RequiresViolation, mainErr11RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr15RequiresViolation, mainErr16RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr14RequiresViolation, inspect_afterErr8RequiresViolation, inspect_afterErr10RequiresViolation, inspect_afterErr1RequiresViolation, inspect_afterErr0RequiresViolation, inspect_afterErr6RequiresViolation, inspect_afterErr7RequiresViolation, inspect_afterErr11RequiresViolation, inspect_afterErr5RequiresViolation, inspect_afterErr2RequiresViolation, inspect_afterErr4RequiresViolation, inspect_afterErr3RequiresViolation, inspect_afterErr9RequiresViolation]=== [2018-01-25 03:39:15,126 INFO L82 PathProgramCache]: Analyzing trace with hash 45229303, now seen corresponding path program 1 times [2018-01-25 03:39:15,127 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-25 03:39:15,127 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 03:39:15,128 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-25 03:39:15,128 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 03:39:15,128 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-25 03:39:15,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-25 03:39:15,136 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-25 03:39:15,150 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-25 03:39:15,150 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-25 03:39:15,150 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-25 03:39:15,150 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-25 03:39:15,151 INFO L409 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-01-25 03:39:15,151 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-01-25 03:39:15,151 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-01-25 03:39:15,152 INFO L87 Difference]: Start difference. First operand 296 states and 310 transitions. Second operand 3 states. [2018-01-25 03:39:15,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-25 03:39:15,181 INFO L93 Difference]: Finished difference Result 580 states and 604 transitions. [2018-01-25 03:39:15,181 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-01-25 03:39:15,181 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2018-01-25 03:39:15,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-25 03:39:15,183 INFO L225 Difference]: With dead ends: 580 [2018-01-25 03:39:15,183 INFO L226 Difference]: Without dead ends: 314 [2018-01-25 03:39:15,184 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-01-25 03:39:15,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2018-01-25 03:39:15,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 295. [2018-01-25 03:39:15,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 295 states. [2018-01-25 03:39:15,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 308 transitions. [2018-01-25 03:39:15,196 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 308 transitions. Word has length 17 [2018-01-25 03:39:15,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-25 03:39:15,196 INFO L432 AbstractCegarLoop]: Abstraction has 295 states and 308 transitions. [2018-01-25 03:39:15,196 INFO L433 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-01-25 03:39:15,196 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 308 transitions. [2018-01-25 03:39:15,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-01-25 03:39:15,197 INFO L314 BasicCegarLoop]: Found error trace [2018-01-25 03:39:15,197 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-25 03:39:15,197 INFO L371 AbstractCegarLoop]: === Iteration 6 === [merge_pairErr19RequiresViolation, merge_pairErr24RequiresViolation, merge_pairErr4RequiresViolation, merge_pairErr11RequiresViolation, merge_pairErr16RequiresViolation, merge_pairErr7RequiresViolation, merge_pairErr9RequiresViolation, merge_pairErr2RequiresViolation, merge_pairErr14RequiresViolation, merge_pairErr29RequiresViolation, merge_pairErr17RequiresViolation, merge_pairErr6RequiresViolation, merge_pairErr27RequiresViolation, merge_pairErr26RequiresViolation, merge_pairErr3RequiresViolation, merge_pairErr13RequiresViolation, merge_pairErr23RequiresViolation, merge_pairErr15RequiresViolation, merge_pairErr0RequiresViolation, merge_pairErr10RequiresViolation, merge_pairErr25RequiresViolation, merge_pairErr20RequiresViolation, merge_pairErr22RequiresViolation, merge_pairErr12RequiresViolation, merge_pairErr5RequiresViolation, merge_pairErr18RequiresViolation, merge_pairErr21RequiresViolation, merge_pairErr1RequiresViolation, merge_pairErr28RequiresViolation, merge_pairErr8RequiresViolation, merge_single_nodeErr4RequiresViolation, merge_single_nodeErr0RequiresViolation, merge_single_nodeErr9RequiresViolation, merge_single_nodeErr7RequiresViolation, merge_single_nodeErr11RequiresViolation, merge_single_nodeErr2RequiresViolation, merge_single_nodeErr1RequiresViolation, merge_single_nodeErr13RequiresViolation, merge_single_nodeErr6RequiresViolation, merge_single_nodeErr5RequiresViolation, merge_single_nodeErr10RequiresViolation, merge_single_nodeErr3RequiresViolation, merge_single_nodeErr12RequiresViolation, merge_single_nodeErr8RequiresViolation, seq_sort_coreErr13RequiresViolation, seq_sort_coreErr7RequiresViolation, seq_sort_coreErr6RequiresViolation, seq_sort_coreErr10RequiresViolation, seq_sort_coreErr1RequiresViolation, seq_sort_coreErr3RequiresViolation, seq_sort_coreErr8RequiresViolation, seq_sort_coreErr12RequiresViolation, seq_sort_coreErr11RequiresViolation, seq_sort_coreErr0RequiresViolation, seq_sort_coreErr4RequiresViolation, seq_sort_coreErr5RequiresViolation, seq_sort_coreErr2RequiresViolation, seq_sort_coreErr9RequiresViolation, inspect_beforeErr15RequiresViolation, inspect_beforeErr7RequiresViolation, inspect_beforeErr11RequiresViolation, inspect_beforeErr3RequiresViolation, inspect_beforeErr2RequiresViolation, inspect_beforeErr10RequiresViolation, inspect_beforeErr16RequiresViolation, inspect_beforeErr1RequiresViolation, inspect_beforeErr6RequiresViolation, inspect_beforeErr18RequiresViolation, inspect_beforeErr13RequiresViolation, inspect_beforeErr0RequiresViolation, inspect_beforeErr9RequiresViolation, inspect_beforeErr4RequiresViolation, inspect_beforeErr17RequiresViolation, inspect_beforeErr8RequiresViolation, inspect_beforeErr12RequiresViolation, inspect_beforeErr14RequiresViolation, inspect_beforeErr5RequiresViolation, inspect_beforeErr19RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr1RequiresViolation, mainErr17RequiresViolation, mainErr9RequiresViolation, mainErr18EnsuresViolation, mainErr0RequiresViolation, mainErr3RequiresViolation, mainErr7RequiresViolation, mainErr11RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr15RequiresViolation, mainErr16RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr14RequiresViolation, inspect_afterErr8RequiresViolation, inspect_afterErr10RequiresViolation, inspect_afterErr1RequiresViolation, inspect_afterErr0RequiresViolation, inspect_afterErr6RequiresViolation, inspect_afterErr7RequiresViolation, inspect_afterErr11RequiresViolation, inspect_afterErr5RequiresViolation, inspect_afterErr2RequiresViolation, inspect_afterErr4RequiresViolation, inspect_afterErr3RequiresViolation, inspect_afterErr9RequiresViolation]=== [2018-01-25 03:39:15,197 INFO L82 PathProgramCache]: Analyzing trace with hash 963226955, now seen corresponding path program 1 times [2018-01-25 03:39:15,197 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-25 03:39:15,198 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 03:39:15,198 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-25 03:39:15,198 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 03:39:15,198 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-25 03:39:15,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-25 03:39:15,215 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-25 03:39:15,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-25 03:39:15,290 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-25 03:39:15,290 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-25 03:39:15,290 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-25 03:39:15,291 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-25 03:39:15,291 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-25 03:39:15,291 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-25 03:39:15,291 INFO L87 Difference]: Start difference. First operand 295 states and 308 transitions. Second operand 4 states. [2018-01-25 03:39:15,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-25 03:39:15,494 INFO L93 Difference]: Finished difference Result 331 states and 347 transitions. [2018-01-25 03:39:15,494 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-01-25 03:39:15,495 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2018-01-25 03:39:15,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-25 03:39:15,496 INFO L225 Difference]: With dead ends: 331 [2018-01-25 03:39:15,497 INFO L226 Difference]: Without dead ends: 329 [2018-01-25 03:39:15,497 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-01-25 03:39:15,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2018-01-25 03:39:15,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 293. [2018-01-25 03:39:15,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 293 states. [2018-01-25 03:39:15,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 306 transitions. [2018-01-25 03:39:15,509 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 306 transitions. Word has length 20 [2018-01-25 03:39:15,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-25 03:39:15,509 INFO L432 AbstractCegarLoop]: Abstraction has 293 states and 306 transitions. [2018-01-25 03:39:15,510 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-25 03:39:15,510 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 306 transitions. [2018-01-25 03:39:15,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-01-25 03:39:15,510 INFO L314 BasicCegarLoop]: Found error trace [2018-01-25 03:39:15,511 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-25 03:39:15,511 INFO L371 AbstractCegarLoop]: === Iteration 7 === [merge_pairErr19RequiresViolation, merge_pairErr24RequiresViolation, merge_pairErr4RequiresViolation, merge_pairErr11RequiresViolation, merge_pairErr16RequiresViolation, merge_pairErr7RequiresViolation, merge_pairErr9RequiresViolation, merge_pairErr2RequiresViolation, merge_pairErr14RequiresViolation, merge_pairErr29RequiresViolation, merge_pairErr17RequiresViolation, merge_pairErr6RequiresViolation, merge_pairErr27RequiresViolation, merge_pairErr26RequiresViolation, merge_pairErr3RequiresViolation, merge_pairErr13RequiresViolation, merge_pairErr23RequiresViolation, merge_pairErr15RequiresViolation, merge_pairErr0RequiresViolation, merge_pairErr10RequiresViolation, merge_pairErr25RequiresViolation, merge_pairErr20RequiresViolation, merge_pairErr22RequiresViolation, merge_pairErr12RequiresViolation, merge_pairErr5RequiresViolation, merge_pairErr18RequiresViolation, merge_pairErr21RequiresViolation, merge_pairErr1RequiresViolation, merge_pairErr28RequiresViolation, merge_pairErr8RequiresViolation, merge_single_nodeErr4RequiresViolation, merge_single_nodeErr0RequiresViolation, merge_single_nodeErr9RequiresViolation, merge_single_nodeErr7RequiresViolation, merge_single_nodeErr11RequiresViolation, merge_single_nodeErr2RequiresViolation, merge_single_nodeErr1RequiresViolation, merge_single_nodeErr13RequiresViolation, merge_single_nodeErr6RequiresViolation, merge_single_nodeErr5RequiresViolation, merge_single_nodeErr10RequiresViolation, merge_single_nodeErr3RequiresViolation, merge_single_nodeErr12RequiresViolation, merge_single_nodeErr8RequiresViolation, seq_sort_coreErr13RequiresViolation, seq_sort_coreErr7RequiresViolation, seq_sort_coreErr6RequiresViolation, seq_sort_coreErr10RequiresViolation, seq_sort_coreErr1RequiresViolation, seq_sort_coreErr3RequiresViolation, seq_sort_coreErr8RequiresViolation, seq_sort_coreErr12RequiresViolation, seq_sort_coreErr11RequiresViolation, seq_sort_coreErr0RequiresViolation, seq_sort_coreErr4RequiresViolation, seq_sort_coreErr5RequiresViolation, seq_sort_coreErr2RequiresViolation, seq_sort_coreErr9RequiresViolation, inspect_beforeErr15RequiresViolation, inspect_beforeErr7RequiresViolation, inspect_beforeErr11RequiresViolation, inspect_beforeErr3RequiresViolation, inspect_beforeErr2RequiresViolation, inspect_beforeErr10RequiresViolation, inspect_beforeErr16RequiresViolation, inspect_beforeErr1RequiresViolation, inspect_beforeErr6RequiresViolation, inspect_beforeErr18RequiresViolation, inspect_beforeErr13RequiresViolation, inspect_beforeErr0RequiresViolation, inspect_beforeErr9RequiresViolation, inspect_beforeErr4RequiresViolation, inspect_beforeErr17RequiresViolation, inspect_beforeErr8RequiresViolation, inspect_beforeErr12RequiresViolation, inspect_beforeErr14RequiresViolation, inspect_beforeErr5RequiresViolation, inspect_beforeErr19RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr1RequiresViolation, mainErr17RequiresViolation, mainErr9RequiresViolation, mainErr18EnsuresViolation, mainErr0RequiresViolation, mainErr3RequiresViolation, mainErr7RequiresViolation, mainErr11RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr15RequiresViolation, mainErr16RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr14RequiresViolation, inspect_afterErr8RequiresViolation, inspect_afterErr10RequiresViolation, inspect_afterErr1RequiresViolation, inspect_afterErr0RequiresViolation, inspect_afterErr6RequiresViolation, inspect_afterErr7RequiresViolation, inspect_afterErr11RequiresViolation, inspect_afterErr5RequiresViolation, inspect_afterErr2RequiresViolation, inspect_afterErr4RequiresViolation, inspect_afterErr3RequiresViolation, inspect_afterErr9RequiresViolation]=== [2018-01-25 03:39:15,511 INFO L82 PathProgramCache]: Analyzing trace with hash 963226954, now seen corresponding path program 1 times [2018-01-25 03:39:15,511 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-25 03:39:15,512 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 03:39:15,512 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-25 03:39:15,513 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 03:39:15,513 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-25 03:39:15,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-25 03:39:15,529 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-25 03:39:15,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-25 03:39:15,566 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-25 03:39:15,566 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-25 03:39:15,566 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-25 03:39:15,567 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-25 03:39:15,567 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-25 03:39:15,567 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-25 03:39:15,567 INFO L87 Difference]: Start difference. First operand 293 states and 306 transitions. Second operand 4 states. [2018-01-25 03:39:15,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-25 03:39:15,809 INFO L93 Difference]: Finished difference Result 318 states and 333 transitions. [2018-01-25 03:39:15,809 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-01-25 03:39:15,809 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2018-01-25 03:39:15,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-25 03:39:15,811 INFO L225 Difference]: With dead ends: 318 [2018-01-25 03:39:15,811 INFO L226 Difference]: Without dead ends: 316 [2018-01-25 03:39:15,812 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-01-25 03:39:15,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2018-01-25 03:39:15,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 291. [2018-01-25 03:39:15,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 291 states. [2018-01-25 03:39:15,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 304 transitions. [2018-01-25 03:39:15,824 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 304 transitions. Word has length 20 [2018-01-25 03:39:15,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-25 03:39:15,824 INFO L432 AbstractCegarLoop]: Abstraction has 291 states and 304 transitions. [2018-01-25 03:39:15,824 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-25 03:39:15,824 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 304 transitions. [2018-01-25 03:39:15,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-01-25 03:39:15,825 INFO L314 BasicCegarLoop]: Found error trace [2018-01-25 03:39:15,825 INFO L322 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-25 03:39:15,825 INFO L371 AbstractCegarLoop]: === Iteration 8 === [merge_pairErr19RequiresViolation, merge_pairErr24RequiresViolation, merge_pairErr4RequiresViolation, merge_pairErr11RequiresViolation, merge_pairErr16RequiresViolation, merge_pairErr7RequiresViolation, merge_pairErr9RequiresViolation, merge_pairErr2RequiresViolation, merge_pairErr14RequiresViolation, merge_pairErr29RequiresViolation, merge_pairErr17RequiresViolation, merge_pairErr6RequiresViolation, merge_pairErr27RequiresViolation, merge_pairErr26RequiresViolation, merge_pairErr3RequiresViolation, merge_pairErr13RequiresViolation, merge_pairErr23RequiresViolation, merge_pairErr15RequiresViolation, merge_pairErr0RequiresViolation, merge_pairErr10RequiresViolation, merge_pairErr25RequiresViolation, merge_pairErr20RequiresViolation, merge_pairErr22RequiresViolation, merge_pairErr12RequiresViolation, merge_pairErr5RequiresViolation, merge_pairErr18RequiresViolation, merge_pairErr21RequiresViolation, merge_pairErr1RequiresViolation, merge_pairErr28RequiresViolation, merge_pairErr8RequiresViolation, merge_single_nodeErr4RequiresViolation, merge_single_nodeErr0RequiresViolation, merge_single_nodeErr9RequiresViolation, merge_single_nodeErr7RequiresViolation, merge_single_nodeErr11RequiresViolation, merge_single_nodeErr2RequiresViolation, merge_single_nodeErr1RequiresViolation, merge_single_nodeErr13RequiresViolation, merge_single_nodeErr6RequiresViolation, merge_single_nodeErr5RequiresViolation, merge_single_nodeErr10RequiresViolation, merge_single_nodeErr3RequiresViolation, merge_single_nodeErr12RequiresViolation, merge_single_nodeErr8RequiresViolation, seq_sort_coreErr13RequiresViolation, seq_sort_coreErr7RequiresViolation, seq_sort_coreErr6RequiresViolation, seq_sort_coreErr10RequiresViolation, seq_sort_coreErr1RequiresViolation, seq_sort_coreErr3RequiresViolation, seq_sort_coreErr8RequiresViolation, seq_sort_coreErr12RequiresViolation, seq_sort_coreErr11RequiresViolation, seq_sort_coreErr0RequiresViolation, seq_sort_coreErr4RequiresViolation, seq_sort_coreErr5RequiresViolation, seq_sort_coreErr2RequiresViolation, seq_sort_coreErr9RequiresViolation, inspect_beforeErr15RequiresViolation, inspect_beforeErr7RequiresViolation, inspect_beforeErr11RequiresViolation, inspect_beforeErr3RequiresViolation, inspect_beforeErr2RequiresViolation, inspect_beforeErr10RequiresViolation, inspect_beforeErr16RequiresViolation, inspect_beforeErr1RequiresViolation, inspect_beforeErr6RequiresViolation, inspect_beforeErr18RequiresViolation, inspect_beforeErr13RequiresViolation, inspect_beforeErr0RequiresViolation, inspect_beforeErr9RequiresViolation, inspect_beforeErr4RequiresViolation, inspect_beforeErr17RequiresViolation, inspect_beforeErr8RequiresViolation, inspect_beforeErr12RequiresViolation, inspect_beforeErr14RequiresViolation, inspect_beforeErr5RequiresViolation, inspect_beforeErr19RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr1RequiresViolation, mainErr17RequiresViolation, mainErr9RequiresViolation, mainErr18EnsuresViolation, mainErr0RequiresViolation, mainErr3RequiresViolation, mainErr7RequiresViolation, mainErr11RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr15RequiresViolation, mainErr16RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr14RequiresViolation, inspect_afterErr8RequiresViolation, inspect_afterErr10RequiresViolation, inspect_afterErr1RequiresViolation, inspect_afterErr0RequiresViolation, inspect_afterErr6RequiresViolation, inspect_afterErr7RequiresViolation, inspect_afterErr11RequiresViolation, inspect_afterErr5RequiresViolation, inspect_afterErr2RequiresViolation, inspect_afterErr4RequiresViolation, inspect_afterErr3RequiresViolation, inspect_afterErr9RequiresViolation]=== [2018-01-25 03:39:15,826 INFO L82 PathProgramCache]: Analyzing trace with hash 1725402921, now seen corresponding path program 1 times [2018-01-25 03:39:15,826 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-25 03:39:15,827 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 03:39:15,827 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-25 03:39:15,827 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 03:39:15,827 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-25 03:39:15,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-25 03:39:15,844 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-25 03:39:15,911 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-25 03:39:15,911 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-25 03:39:15,911 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-25 03:39:15,911 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-25 03:39:15,912 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-25 03:39:15,912 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-25 03:39:15,912 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-01-25 03:39:15,912 INFO L87 Difference]: Start difference. First operand 291 states and 304 transitions. Second operand 5 states. [2018-01-25 03:39:16,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-25 03:39:16,162 INFO L93 Difference]: Finished difference Result 333 states and 349 transitions. [2018-01-25 03:39:16,163 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-25 03:39:16,163 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 27 [2018-01-25 03:39:16,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-25 03:39:16,165 INFO L225 Difference]: With dead ends: 333 [2018-01-25 03:39:16,165 INFO L226 Difference]: Without dead ends: 331 [2018-01-25 03:39:16,166 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-01-25 03:39:16,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2018-01-25 03:39:16,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 291. [2018-01-25 03:39:16,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 291 states. [2018-01-25 03:39:16,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 303 transitions. [2018-01-25 03:39:16,178 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 303 transitions. Word has length 27 [2018-01-25 03:39:16,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-25 03:39:16,179 INFO L432 AbstractCegarLoop]: Abstraction has 291 states and 303 transitions. [2018-01-25 03:39:16,179 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-25 03:39:16,179 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 303 transitions. [2018-01-25 03:39:16,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-01-25 03:39:16,180 INFO L314 BasicCegarLoop]: Found error trace [2018-01-25 03:39:16,180 INFO L322 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-25 03:39:16,180 INFO L371 AbstractCegarLoop]: === Iteration 9 === [merge_pairErr19RequiresViolation, merge_pairErr24RequiresViolation, merge_pairErr4RequiresViolation, merge_pairErr11RequiresViolation, merge_pairErr16RequiresViolation, merge_pairErr7RequiresViolation, merge_pairErr9RequiresViolation, merge_pairErr2RequiresViolation, merge_pairErr14RequiresViolation, merge_pairErr29RequiresViolation, merge_pairErr17RequiresViolation, merge_pairErr6RequiresViolation, merge_pairErr27RequiresViolation, merge_pairErr26RequiresViolation, merge_pairErr3RequiresViolation, merge_pairErr13RequiresViolation, merge_pairErr23RequiresViolation, merge_pairErr15RequiresViolation, merge_pairErr0RequiresViolation, merge_pairErr10RequiresViolation, merge_pairErr25RequiresViolation, merge_pairErr20RequiresViolation, merge_pairErr22RequiresViolation, merge_pairErr12RequiresViolation, merge_pairErr5RequiresViolation, merge_pairErr18RequiresViolation, merge_pairErr21RequiresViolation, merge_pairErr1RequiresViolation, merge_pairErr28RequiresViolation, merge_pairErr8RequiresViolation, merge_single_nodeErr4RequiresViolation, merge_single_nodeErr0RequiresViolation, merge_single_nodeErr9RequiresViolation, merge_single_nodeErr7RequiresViolation, merge_single_nodeErr11RequiresViolation, merge_single_nodeErr2RequiresViolation, merge_single_nodeErr1RequiresViolation, merge_single_nodeErr13RequiresViolation, merge_single_nodeErr6RequiresViolation, merge_single_nodeErr5RequiresViolation, merge_single_nodeErr10RequiresViolation, merge_single_nodeErr3RequiresViolation, merge_single_nodeErr12RequiresViolation, merge_single_nodeErr8RequiresViolation, seq_sort_coreErr13RequiresViolation, seq_sort_coreErr7RequiresViolation, seq_sort_coreErr6RequiresViolation, seq_sort_coreErr10RequiresViolation, seq_sort_coreErr1RequiresViolation, seq_sort_coreErr3RequiresViolation, seq_sort_coreErr8RequiresViolation, seq_sort_coreErr12RequiresViolation, seq_sort_coreErr11RequiresViolation, seq_sort_coreErr0RequiresViolation, seq_sort_coreErr4RequiresViolation, seq_sort_coreErr5RequiresViolation, seq_sort_coreErr2RequiresViolation, seq_sort_coreErr9RequiresViolation, inspect_beforeErr15RequiresViolation, inspect_beforeErr7RequiresViolation, inspect_beforeErr11RequiresViolation, inspect_beforeErr3RequiresViolation, inspect_beforeErr2RequiresViolation, inspect_beforeErr10RequiresViolation, inspect_beforeErr16RequiresViolation, inspect_beforeErr1RequiresViolation, inspect_beforeErr6RequiresViolation, inspect_beforeErr18RequiresViolation, inspect_beforeErr13RequiresViolation, inspect_beforeErr0RequiresViolation, inspect_beforeErr9RequiresViolation, inspect_beforeErr4RequiresViolation, inspect_beforeErr17RequiresViolation, inspect_beforeErr8RequiresViolation, inspect_beforeErr12RequiresViolation, inspect_beforeErr14RequiresViolation, inspect_beforeErr5RequiresViolation, inspect_beforeErr19RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr1RequiresViolation, mainErr17RequiresViolation, mainErr9RequiresViolation, mainErr18EnsuresViolation, mainErr0RequiresViolation, mainErr3RequiresViolation, mainErr7RequiresViolation, mainErr11RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr15RequiresViolation, mainErr16RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr14RequiresViolation, inspect_afterErr8RequiresViolation, inspect_afterErr10RequiresViolation, inspect_afterErr1RequiresViolation, inspect_afterErr0RequiresViolation, inspect_afterErr6RequiresViolation, inspect_afterErr7RequiresViolation, inspect_afterErr11RequiresViolation, inspect_afterErr5RequiresViolation, inspect_afterErr2RequiresViolation, inspect_afterErr4RequiresViolation, inspect_afterErr3RequiresViolation, inspect_afterErr9RequiresViolation]=== [2018-01-25 03:39:16,180 INFO L82 PathProgramCache]: Analyzing trace with hash 1961365059, now seen corresponding path program 1 times [2018-01-25 03:39:16,181 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-25 03:39:16,182 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 03:39:16,182 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-25 03:39:16,182 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 03:39:16,182 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-25 03:39:16,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-25 03:39:16,205 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-25 03:39:16,386 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-25 03:39:16,386 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-25 03:39:16,386 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-25 03:39:16,386 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-25 03:39:16,387 INFO L409 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-01-25 03:39:16,387 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-01-25 03:39:16,387 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-01-25 03:39:16,387 INFO L87 Difference]: Start difference. First operand 291 states and 303 transitions. Second operand 6 states. [2018-01-25 03:39:17,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-25 03:39:17,460 INFO L93 Difference]: Finished difference Result 320 states and 337 transitions. [2018-01-25 03:39:17,460 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-01-25 03:39:17,461 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 33 [2018-01-25 03:39:17,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-25 03:39:17,463 INFO L225 Difference]: With dead ends: 320 [2018-01-25 03:39:17,463 INFO L226 Difference]: Without dead ends: 309 [2018-01-25 03:39:17,464 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2018-01-25 03:39:17,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2018-01-25 03:39:17,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 286. [2018-01-25 03:39:17,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 286 states. [2018-01-25 03:39:17,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 300 transitions. [2018-01-25 03:39:17,477 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 300 transitions. Word has length 33 [2018-01-25 03:39:17,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-25 03:39:17,477 INFO L432 AbstractCegarLoop]: Abstraction has 286 states and 300 transitions. [2018-01-25 03:39:17,477 INFO L433 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-01-25 03:39:17,478 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 300 transitions. [2018-01-25 03:39:17,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-01-25 03:39:17,479 INFO L314 BasicCegarLoop]: Found error trace [2018-01-25 03:39:17,479 INFO L322 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-25 03:39:17,479 INFO L371 AbstractCegarLoop]: === Iteration 10 === [merge_pairErr19RequiresViolation, merge_pairErr24RequiresViolation, merge_pairErr4RequiresViolation, merge_pairErr11RequiresViolation, merge_pairErr16RequiresViolation, merge_pairErr7RequiresViolation, merge_pairErr9RequiresViolation, merge_pairErr2RequiresViolation, merge_pairErr14RequiresViolation, merge_pairErr29RequiresViolation, merge_pairErr17RequiresViolation, merge_pairErr6RequiresViolation, merge_pairErr27RequiresViolation, merge_pairErr26RequiresViolation, merge_pairErr3RequiresViolation, merge_pairErr13RequiresViolation, merge_pairErr23RequiresViolation, merge_pairErr15RequiresViolation, merge_pairErr0RequiresViolation, merge_pairErr10RequiresViolation, merge_pairErr25RequiresViolation, merge_pairErr20RequiresViolation, merge_pairErr22RequiresViolation, merge_pairErr12RequiresViolation, merge_pairErr5RequiresViolation, merge_pairErr18RequiresViolation, merge_pairErr21RequiresViolation, merge_pairErr1RequiresViolation, merge_pairErr28RequiresViolation, merge_pairErr8RequiresViolation, merge_single_nodeErr4RequiresViolation, merge_single_nodeErr0RequiresViolation, merge_single_nodeErr9RequiresViolation, merge_single_nodeErr7RequiresViolation, merge_single_nodeErr11RequiresViolation, merge_single_nodeErr2RequiresViolation, merge_single_nodeErr1RequiresViolation, merge_single_nodeErr13RequiresViolation, merge_single_nodeErr6RequiresViolation, merge_single_nodeErr5RequiresViolation, merge_single_nodeErr10RequiresViolation, merge_single_nodeErr3RequiresViolation, merge_single_nodeErr12RequiresViolation, merge_single_nodeErr8RequiresViolation, seq_sort_coreErr13RequiresViolation, seq_sort_coreErr7RequiresViolation, seq_sort_coreErr6RequiresViolation, seq_sort_coreErr10RequiresViolation, seq_sort_coreErr1RequiresViolation, seq_sort_coreErr3RequiresViolation, seq_sort_coreErr8RequiresViolation, seq_sort_coreErr12RequiresViolation, seq_sort_coreErr11RequiresViolation, seq_sort_coreErr0RequiresViolation, seq_sort_coreErr4RequiresViolation, seq_sort_coreErr5RequiresViolation, seq_sort_coreErr2RequiresViolation, seq_sort_coreErr9RequiresViolation, inspect_beforeErr15RequiresViolation, inspect_beforeErr7RequiresViolation, inspect_beforeErr11RequiresViolation, inspect_beforeErr3RequiresViolation, inspect_beforeErr2RequiresViolation, inspect_beforeErr10RequiresViolation, inspect_beforeErr16RequiresViolation, inspect_beforeErr1RequiresViolation, inspect_beforeErr6RequiresViolation, inspect_beforeErr18RequiresViolation, inspect_beforeErr13RequiresViolation, inspect_beforeErr0RequiresViolation, inspect_beforeErr9RequiresViolation, inspect_beforeErr4RequiresViolation, inspect_beforeErr17RequiresViolation, inspect_beforeErr8RequiresViolation, inspect_beforeErr12RequiresViolation, inspect_beforeErr14RequiresViolation, inspect_beforeErr5RequiresViolation, inspect_beforeErr19RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr1RequiresViolation, mainErr17RequiresViolation, mainErr9RequiresViolation, mainErr18EnsuresViolation, mainErr0RequiresViolation, mainErr3RequiresViolation, mainErr7RequiresViolation, mainErr11RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr15RequiresViolation, mainErr16RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr14RequiresViolation, inspect_afterErr8RequiresViolation, inspect_afterErr10RequiresViolation, inspect_afterErr1RequiresViolation, inspect_afterErr0RequiresViolation, inspect_afterErr6RequiresViolation, inspect_afterErr7RequiresViolation, inspect_afterErr11RequiresViolation, inspect_afterErr5RequiresViolation, inspect_afterErr2RequiresViolation, inspect_afterErr4RequiresViolation, inspect_afterErr3RequiresViolation, inspect_afterErr9RequiresViolation]=== [2018-01-25 03:39:17,479 INFO L82 PathProgramCache]: Analyzing trace with hash 1961365060, now seen corresponding path program 1 times [2018-01-25 03:39:17,479 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-25 03:39:17,480 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 03:39:17,481 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-25 03:39:17,481 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 03:39:17,481 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-25 03:39:17,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-25 03:39:17,511 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-25 03:39:17,696 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-25 03:39:17,696 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-25 03:39:17,696 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-01-25 03:39:17,697 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-25 03:39:17,697 INFO L409 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-01-25 03:39:17,697 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-01-25 03:39:17,697 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-01-25 03:39:17,698 INFO L87 Difference]: Start difference. First operand 286 states and 300 transitions. Second operand 7 states. [2018-01-25 03:39:18,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-25 03:39:20,531 INFO L93 Difference]: Finished difference Result 370 states and 386 transitions. [2018-01-25 03:39:20,531 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-01-25 03:39:20,532 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 33 [2018-01-25 03:39:20,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-25 03:39:20,534 INFO L225 Difference]: With dead ends: 370 [2018-01-25 03:39:20,534 INFO L226 Difference]: Without dead ends: 359 [2018-01-25 03:39:20,535 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2018-01-25 03:39:20,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2018-01-25 03:39:20,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 322. [2018-01-25 03:39:20,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 322 states. [2018-01-25 03:39:20,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 339 transitions. [2018-01-25 03:39:20,555 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 339 transitions. Word has length 33 [2018-01-25 03:39:20,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-25 03:39:20,556 INFO L432 AbstractCegarLoop]: Abstraction has 322 states and 339 transitions. [2018-01-25 03:39:20,556 INFO L433 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-01-25 03:39:20,556 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 339 transitions. [2018-01-25 03:39:20,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-01-25 03:39:20,559 INFO L314 BasicCegarLoop]: Found error trace [2018-01-25 03:39:20,559 INFO L322 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-25 03:39:20,559 INFO L371 AbstractCegarLoop]: === Iteration 11 === [merge_pairErr19RequiresViolation, merge_pairErr24RequiresViolation, merge_pairErr4RequiresViolation, merge_pairErr11RequiresViolation, merge_pairErr16RequiresViolation, merge_pairErr7RequiresViolation, merge_pairErr9RequiresViolation, merge_pairErr2RequiresViolation, merge_pairErr14RequiresViolation, merge_pairErr29RequiresViolation, merge_pairErr17RequiresViolation, merge_pairErr6RequiresViolation, merge_pairErr27RequiresViolation, merge_pairErr26RequiresViolation, merge_pairErr3RequiresViolation, merge_pairErr13RequiresViolation, merge_pairErr23RequiresViolation, merge_pairErr15RequiresViolation, merge_pairErr0RequiresViolation, merge_pairErr10RequiresViolation, merge_pairErr25RequiresViolation, merge_pairErr20RequiresViolation, merge_pairErr22RequiresViolation, merge_pairErr12RequiresViolation, merge_pairErr5RequiresViolation, merge_pairErr18RequiresViolation, merge_pairErr21RequiresViolation, merge_pairErr1RequiresViolation, merge_pairErr28RequiresViolation, merge_pairErr8RequiresViolation, merge_single_nodeErr4RequiresViolation, merge_single_nodeErr0RequiresViolation, merge_single_nodeErr9RequiresViolation, merge_single_nodeErr7RequiresViolation, merge_single_nodeErr11RequiresViolation, merge_single_nodeErr2RequiresViolation, merge_single_nodeErr1RequiresViolation, merge_single_nodeErr13RequiresViolation, merge_single_nodeErr6RequiresViolation, merge_single_nodeErr5RequiresViolation, merge_single_nodeErr10RequiresViolation, merge_single_nodeErr3RequiresViolation, merge_single_nodeErr12RequiresViolation, merge_single_nodeErr8RequiresViolation, seq_sort_coreErr13RequiresViolation, seq_sort_coreErr7RequiresViolation, seq_sort_coreErr6RequiresViolation, seq_sort_coreErr10RequiresViolation, seq_sort_coreErr1RequiresViolation, seq_sort_coreErr3RequiresViolation, seq_sort_coreErr8RequiresViolation, seq_sort_coreErr12RequiresViolation, seq_sort_coreErr11RequiresViolation, seq_sort_coreErr0RequiresViolation, seq_sort_coreErr4RequiresViolation, seq_sort_coreErr5RequiresViolation, seq_sort_coreErr2RequiresViolation, seq_sort_coreErr9RequiresViolation, inspect_beforeErr15RequiresViolation, inspect_beforeErr7RequiresViolation, inspect_beforeErr11RequiresViolation, inspect_beforeErr3RequiresViolation, inspect_beforeErr2RequiresViolation, inspect_beforeErr10RequiresViolation, inspect_beforeErr16RequiresViolation, inspect_beforeErr1RequiresViolation, inspect_beforeErr6RequiresViolation, inspect_beforeErr18RequiresViolation, inspect_beforeErr13RequiresViolation, inspect_beforeErr0RequiresViolation, inspect_beforeErr9RequiresViolation, inspect_beforeErr4RequiresViolation, inspect_beforeErr17RequiresViolation, inspect_beforeErr8RequiresViolation, inspect_beforeErr12RequiresViolation, inspect_beforeErr14RequiresViolation, inspect_beforeErr5RequiresViolation, inspect_beforeErr19RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr1RequiresViolation, mainErr17RequiresViolation, mainErr9RequiresViolation, mainErr18EnsuresViolation, mainErr0RequiresViolation, mainErr3RequiresViolation, mainErr7RequiresViolation, mainErr11RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr15RequiresViolation, mainErr16RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr14RequiresViolation, inspect_afterErr8RequiresViolation, inspect_afterErr10RequiresViolation, inspect_afterErr1RequiresViolation, inspect_afterErr0RequiresViolation, inspect_afterErr6RequiresViolation, inspect_afterErr7RequiresViolation, inspect_afterErr11RequiresViolation, inspect_afterErr5RequiresViolation, inspect_afterErr2RequiresViolation, inspect_afterErr4RequiresViolation, inspect_afterErr3RequiresViolation, inspect_afterErr9RequiresViolation]=== [2018-01-25 03:39:20,560 INFO L82 PathProgramCache]: Analyzing trace with hash 816569686, now seen corresponding path program 1 times [2018-01-25 03:39:20,560 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-25 03:39:20,561 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 03:39:20,561 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-25 03:39:20,561 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 03:39:20,561 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-25 03:39:20,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-25 03:39:20,601 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-25 03:39:21,152 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-25 03:39:21,152 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-25 03:39:21,152 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2018-01-25 03:39:21,153 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-25 03:39:21,153 INFO L409 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-01-25 03:39:21,153 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-01-25 03:39:21,153 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2018-01-25 03:39:21,154 INFO L87 Difference]: Start difference. First operand 322 states and 339 transitions. Second operand 12 states. [2018-01-25 03:39:22,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-25 03:39:22,235 INFO L93 Difference]: Finished difference Result 337 states and 353 transitions. [2018-01-25 03:39:22,235 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-01-25 03:39:22,235 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 48 [2018-01-25 03:39:22,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-25 03:39:22,240 INFO L225 Difference]: With dead ends: 337 [2018-01-25 03:39:22,240 INFO L226 Difference]: Without dead ends: 336 [2018-01-25 03:39:22,241 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2018-01-25 03:39:22,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2018-01-25 03:39:22,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 323. [2018-01-25 03:39:22,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 323 states. [2018-01-25 03:39:22,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 341 transitions. [2018-01-25 03:39:22,257 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 341 transitions. Word has length 48 [2018-01-25 03:39:22,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-25 03:39:22,258 INFO L432 AbstractCegarLoop]: Abstraction has 323 states and 341 transitions. [2018-01-25 03:39:22,258 INFO L433 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-01-25 03:39:22,258 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 341 transitions. [2018-01-25 03:39:22,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-01-25 03:39:22,259 INFO L314 BasicCegarLoop]: Found error trace [2018-01-25 03:39:22,260 INFO L322 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-25 03:39:22,260 INFO L371 AbstractCegarLoop]: === Iteration 12 === [merge_pairErr19RequiresViolation, merge_pairErr24RequiresViolation, merge_pairErr4RequiresViolation, merge_pairErr11RequiresViolation, merge_pairErr16RequiresViolation, merge_pairErr7RequiresViolation, merge_pairErr9RequiresViolation, merge_pairErr2RequiresViolation, merge_pairErr14RequiresViolation, merge_pairErr29RequiresViolation, merge_pairErr17RequiresViolation, merge_pairErr6RequiresViolation, merge_pairErr27RequiresViolation, merge_pairErr26RequiresViolation, merge_pairErr3RequiresViolation, merge_pairErr13RequiresViolation, merge_pairErr23RequiresViolation, merge_pairErr15RequiresViolation, merge_pairErr0RequiresViolation, merge_pairErr10RequiresViolation, merge_pairErr25RequiresViolation, merge_pairErr20RequiresViolation, merge_pairErr22RequiresViolation, merge_pairErr12RequiresViolation, merge_pairErr5RequiresViolation, merge_pairErr18RequiresViolation, merge_pairErr21RequiresViolation, merge_pairErr1RequiresViolation, merge_pairErr28RequiresViolation, merge_pairErr8RequiresViolation, merge_single_nodeErr4RequiresViolation, merge_single_nodeErr0RequiresViolation, merge_single_nodeErr9RequiresViolation, merge_single_nodeErr7RequiresViolation, merge_single_nodeErr11RequiresViolation, merge_single_nodeErr2RequiresViolation, merge_single_nodeErr1RequiresViolation, merge_single_nodeErr13RequiresViolation, merge_single_nodeErr6RequiresViolation, merge_single_nodeErr5RequiresViolation, merge_single_nodeErr10RequiresViolation, merge_single_nodeErr3RequiresViolation, merge_single_nodeErr12RequiresViolation, merge_single_nodeErr8RequiresViolation, seq_sort_coreErr13RequiresViolation, seq_sort_coreErr7RequiresViolation, seq_sort_coreErr6RequiresViolation, seq_sort_coreErr10RequiresViolation, seq_sort_coreErr1RequiresViolation, seq_sort_coreErr3RequiresViolation, seq_sort_coreErr8RequiresViolation, seq_sort_coreErr12RequiresViolation, seq_sort_coreErr11RequiresViolation, seq_sort_coreErr0RequiresViolation, seq_sort_coreErr4RequiresViolation, seq_sort_coreErr5RequiresViolation, seq_sort_coreErr2RequiresViolation, seq_sort_coreErr9RequiresViolation, inspect_beforeErr15RequiresViolation, inspect_beforeErr7RequiresViolation, inspect_beforeErr11RequiresViolation, inspect_beforeErr3RequiresViolation, inspect_beforeErr2RequiresViolation, inspect_beforeErr10RequiresViolation, inspect_beforeErr16RequiresViolation, inspect_beforeErr1RequiresViolation, inspect_beforeErr6RequiresViolation, inspect_beforeErr18RequiresViolation, inspect_beforeErr13RequiresViolation, inspect_beforeErr0RequiresViolation, inspect_beforeErr9RequiresViolation, inspect_beforeErr4RequiresViolation, inspect_beforeErr17RequiresViolation, inspect_beforeErr8RequiresViolation, inspect_beforeErr12RequiresViolation, inspect_beforeErr14RequiresViolation, inspect_beforeErr5RequiresViolation, inspect_beforeErr19RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr1RequiresViolation, mainErr17RequiresViolation, mainErr9RequiresViolation, mainErr18EnsuresViolation, mainErr0RequiresViolation, mainErr3RequiresViolation, mainErr7RequiresViolation, mainErr11RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr15RequiresViolation, mainErr16RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr14RequiresViolation, inspect_afterErr8RequiresViolation, inspect_afterErr10RequiresViolation, inspect_afterErr1RequiresViolation, inspect_afterErr0RequiresViolation, inspect_afterErr6RequiresViolation, inspect_afterErr7RequiresViolation, inspect_afterErr11RequiresViolation, inspect_afterErr5RequiresViolation, inspect_afterErr2RequiresViolation, inspect_afterErr4RequiresViolation, inspect_afterErr3RequiresViolation, inspect_afterErr9RequiresViolation]=== [2018-01-25 03:39:22,260 INFO L82 PathProgramCache]: Analyzing trace with hash 816569687, now seen corresponding path program 1 times [2018-01-25 03:39:22,260 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-25 03:39:22,261 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 03:39:22,261 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-25 03:39:22,261 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 03:39:22,262 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-25 03:39:22,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-25 03:39:22,295 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-25 03:39:22,621 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-25 03:39:22,622 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-25 03:39:22,622 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2018-01-25 03:39:22,622 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-25 03:39:22,622 INFO L409 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-01-25 03:39:22,622 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-01-25 03:39:22,622 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2018-01-25 03:39:22,623 INFO L87 Difference]: Start difference. First operand 323 states and 341 transitions. Second operand 10 states. [2018-01-25 03:39:23,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-25 03:39:23,502 INFO L93 Difference]: Finished difference Result 349 states and 365 transitions. [2018-01-25 03:39:23,503 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-01-25 03:39:23,503 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 48 [2018-01-25 03:39:23,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-25 03:39:23,505 INFO L225 Difference]: With dead ends: 349 [2018-01-25 03:39:23,505 INFO L226 Difference]: Without dead ends: 348 [2018-01-25 03:39:23,505 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2018-01-25 03:39:23,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2018-01-25 03:39:23,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 323. [2018-01-25 03:39:23,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 323 states. [2018-01-25 03:39:23,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 340 transitions. [2018-01-25 03:39:23,522 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 340 transitions. Word has length 48 [2018-01-25 03:39:23,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-25 03:39:23,522 INFO L432 AbstractCegarLoop]: Abstraction has 323 states and 340 transitions. [2018-01-25 03:39:23,522 INFO L433 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-01-25 03:39:23,523 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 340 transitions. [2018-01-25 03:39:23,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-01-25 03:39:23,524 INFO L314 BasicCegarLoop]: Found error trace [2018-01-25 03:39:23,524 INFO L322 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-25 03:39:23,524 INFO L371 AbstractCegarLoop]: === Iteration 13 === [merge_pairErr19RequiresViolation, merge_pairErr24RequiresViolation, merge_pairErr4RequiresViolation, merge_pairErr11RequiresViolation, merge_pairErr16RequiresViolation, merge_pairErr7RequiresViolation, merge_pairErr9RequiresViolation, merge_pairErr2RequiresViolation, merge_pairErr14RequiresViolation, merge_pairErr29RequiresViolation, merge_pairErr17RequiresViolation, merge_pairErr6RequiresViolation, merge_pairErr27RequiresViolation, merge_pairErr26RequiresViolation, merge_pairErr3RequiresViolation, merge_pairErr13RequiresViolation, merge_pairErr23RequiresViolation, merge_pairErr15RequiresViolation, merge_pairErr0RequiresViolation, merge_pairErr10RequiresViolation, merge_pairErr25RequiresViolation, merge_pairErr20RequiresViolation, merge_pairErr22RequiresViolation, merge_pairErr12RequiresViolation, merge_pairErr5RequiresViolation, merge_pairErr18RequiresViolation, merge_pairErr21RequiresViolation, merge_pairErr1RequiresViolation, merge_pairErr28RequiresViolation, merge_pairErr8RequiresViolation, merge_single_nodeErr4RequiresViolation, merge_single_nodeErr0RequiresViolation, merge_single_nodeErr9RequiresViolation, merge_single_nodeErr7RequiresViolation, merge_single_nodeErr11RequiresViolation, merge_single_nodeErr2RequiresViolation, merge_single_nodeErr1RequiresViolation, merge_single_nodeErr13RequiresViolation, merge_single_nodeErr6RequiresViolation, merge_single_nodeErr5RequiresViolation, merge_single_nodeErr10RequiresViolation, merge_single_nodeErr3RequiresViolation, merge_single_nodeErr12RequiresViolation, merge_single_nodeErr8RequiresViolation, seq_sort_coreErr13RequiresViolation, seq_sort_coreErr7RequiresViolation, seq_sort_coreErr6RequiresViolation, seq_sort_coreErr10RequiresViolation, seq_sort_coreErr1RequiresViolation, seq_sort_coreErr3RequiresViolation, seq_sort_coreErr8RequiresViolation, seq_sort_coreErr12RequiresViolation, seq_sort_coreErr11RequiresViolation, seq_sort_coreErr0RequiresViolation, seq_sort_coreErr4RequiresViolation, seq_sort_coreErr5RequiresViolation, seq_sort_coreErr2RequiresViolation, seq_sort_coreErr9RequiresViolation, inspect_beforeErr15RequiresViolation, inspect_beforeErr7RequiresViolation, inspect_beforeErr11RequiresViolation, inspect_beforeErr3RequiresViolation, inspect_beforeErr2RequiresViolation, inspect_beforeErr10RequiresViolation, inspect_beforeErr16RequiresViolation, inspect_beforeErr1RequiresViolation, inspect_beforeErr6RequiresViolation, inspect_beforeErr18RequiresViolation, inspect_beforeErr13RequiresViolation, inspect_beforeErr0RequiresViolation, inspect_beforeErr9RequiresViolation, inspect_beforeErr4RequiresViolation, inspect_beforeErr17RequiresViolation, inspect_beforeErr8RequiresViolation, inspect_beforeErr12RequiresViolation, inspect_beforeErr14RequiresViolation, inspect_beforeErr5RequiresViolation, inspect_beforeErr19RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr1RequiresViolation, mainErr17RequiresViolation, mainErr9RequiresViolation, mainErr18EnsuresViolation, mainErr0RequiresViolation, mainErr3RequiresViolation, mainErr7RequiresViolation, mainErr11RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr15RequiresViolation, mainErr16RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr14RequiresViolation, inspect_afterErr8RequiresViolation, inspect_afterErr10RequiresViolation, inspect_afterErr1RequiresViolation, inspect_afterErr0RequiresViolation, inspect_afterErr6RequiresViolation, inspect_afterErr7RequiresViolation, inspect_afterErr11RequiresViolation, inspect_afterErr5RequiresViolation, inspect_afterErr2RequiresViolation, inspect_afterErr4RequiresViolation, inspect_afterErr3RequiresViolation, inspect_afterErr9RequiresViolation]=== [2018-01-25 03:39:23,524 INFO L82 PathProgramCache]: Analyzing trace with hash 1119918648, now seen corresponding path program 1 times [2018-01-25 03:39:23,524 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-25 03:39:23,525 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 03:39:23,525 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-25 03:39:23,526 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 03:39:23,526 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-25 03:39:23,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-25 03:39:23,544 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-25 03:39:24,097 WARN L146 SmtUtils]: Spent 126ms on a formula simplification. DAG size of input: 21 DAG size of output 16 [2018-01-25 03:39:24,168 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-25 03:39:24,169 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-25 03:39:24,169 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2018-01-25 03:39:24,169 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-25 03:39:24,169 INFO L409 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-01-25 03:39:24,169 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-01-25 03:39:24,170 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2018-01-25 03:39:24,170 INFO L87 Difference]: Start difference. First operand 323 states and 340 transitions. Second operand 12 states. [2018-01-25 03:39:25,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-25 03:39:25,134 INFO L93 Difference]: Finished difference Result 335 states and 351 transitions. [2018-01-25 03:39:25,135 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-01-25 03:39:25,135 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 48 [2018-01-25 03:39:25,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-25 03:39:25,137 INFO L225 Difference]: With dead ends: 335 [2018-01-25 03:39:25,137 INFO L226 Difference]: Without dead ends: 334 [2018-01-25 03:39:25,138 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2018-01-25 03:39:25,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2018-01-25 03:39:25,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 323. [2018-01-25 03:39:25,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 323 states. [2018-01-25 03:39:25,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 339 transitions. [2018-01-25 03:39:25,154 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 339 transitions. Word has length 48 [2018-01-25 03:39:25,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-25 03:39:25,156 INFO L432 AbstractCegarLoop]: Abstraction has 323 states and 339 transitions. [2018-01-25 03:39:25,156 INFO L433 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-01-25 03:39:25,156 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 339 transitions. [2018-01-25 03:39:25,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-01-25 03:39:25,157 INFO L314 BasicCegarLoop]: Found error trace [2018-01-25 03:39:25,158 INFO L322 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-25 03:39:25,158 INFO L371 AbstractCegarLoop]: === Iteration 14 === [merge_pairErr19RequiresViolation, merge_pairErr24RequiresViolation, merge_pairErr4RequiresViolation, merge_pairErr11RequiresViolation, merge_pairErr16RequiresViolation, merge_pairErr7RequiresViolation, merge_pairErr9RequiresViolation, merge_pairErr2RequiresViolation, merge_pairErr14RequiresViolation, merge_pairErr29RequiresViolation, merge_pairErr17RequiresViolation, merge_pairErr6RequiresViolation, merge_pairErr27RequiresViolation, merge_pairErr26RequiresViolation, merge_pairErr3RequiresViolation, merge_pairErr13RequiresViolation, merge_pairErr23RequiresViolation, merge_pairErr15RequiresViolation, merge_pairErr0RequiresViolation, merge_pairErr10RequiresViolation, merge_pairErr25RequiresViolation, merge_pairErr20RequiresViolation, merge_pairErr22RequiresViolation, merge_pairErr12RequiresViolation, merge_pairErr5RequiresViolation, merge_pairErr18RequiresViolation, merge_pairErr21RequiresViolation, merge_pairErr1RequiresViolation, merge_pairErr28RequiresViolation, merge_pairErr8RequiresViolation, merge_single_nodeErr4RequiresViolation, merge_single_nodeErr0RequiresViolation, merge_single_nodeErr9RequiresViolation, merge_single_nodeErr7RequiresViolation, merge_single_nodeErr11RequiresViolation, merge_single_nodeErr2RequiresViolation, merge_single_nodeErr1RequiresViolation, merge_single_nodeErr13RequiresViolation, merge_single_nodeErr6RequiresViolation, merge_single_nodeErr5RequiresViolation, merge_single_nodeErr10RequiresViolation, merge_single_nodeErr3RequiresViolation, merge_single_nodeErr12RequiresViolation, merge_single_nodeErr8RequiresViolation, seq_sort_coreErr13RequiresViolation, seq_sort_coreErr7RequiresViolation, seq_sort_coreErr6RequiresViolation, seq_sort_coreErr10RequiresViolation, seq_sort_coreErr1RequiresViolation, seq_sort_coreErr3RequiresViolation, seq_sort_coreErr8RequiresViolation, seq_sort_coreErr12RequiresViolation, seq_sort_coreErr11RequiresViolation, seq_sort_coreErr0RequiresViolation, seq_sort_coreErr4RequiresViolation, seq_sort_coreErr5RequiresViolation, seq_sort_coreErr2RequiresViolation, seq_sort_coreErr9RequiresViolation, inspect_beforeErr15RequiresViolation, inspect_beforeErr7RequiresViolation, inspect_beforeErr11RequiresViolation, inspect_beforeErr3RequiresViolation, inspect_beforeErr2RequiresViolation, inspect_beforeErr10RequiresViolation, inspect_beforeErr16RequiresViolation, inspect_beforeErr1RequiresViolation, inspect_beforeErr6RequiresViolation, inspect_beforeErr18RequiresViolation, inspect_beforeErr13RequiresViolation, inspect_beforeErr0RequiresViolation, inspect_beforeErr9RequiresViolation, inspect_beforeErr4RequiresViolation, inspect_beforeErr17RequiresViolation, inspect_beforeErr8RequiresViolation, inspect_beforeErr12RequiresViolation, inspect_beforeErr14RequiresViolation, inspect_beforeErr5RequiresViolation, inspect_beforeErr19RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr1RequiresViolation, mainErr17RequiresViolation, mainErr9RequiresViolation, mainErr18EnsuresViolation, mainErr0RequiresViolation, mainErr3RequiresViolation, mainErr7RequiresViolation, mainErr11RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr15RequiresViolation, mainErr16RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr14RequiresViolation, inspect_afterErr8RequiresViolation, inspect_afterErr10RequiresViolation, inspect_afterErr1RequiresViolation, inspect_afterErr0RequiresViolation, inspect_afterErr6RequiresViolation, inspect_afterErr7RequiresViolation, inspect_afterErr11RequiresViolation, inspect_afterErr5RequiresViolation, inspect_afterErr2RequiresViolation, inspect_afterErr4RequiresViolation, inspect_afterErr3RequiresViolation, inspect_afterErr9RequiresViolation]=== [2018-01-25 03:39:25,158 INFO L82 PathProgramCache]: Analyzing trace with hash 1119918649, now seen corresponding path program 1 times [2018-01-25 03:39:25,158 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-25 03:39:25,159 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 03:39:25,159 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-25 03:39:25,159 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 03:39:25,159 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-25 03:39:25,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-25 03:39:25,176 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-25 03:39:25,698 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-25 03:39:25,698 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-25 03:39:25,698 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2018-01-25 03:39:25,698 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-25 03:39:25,699 INFO L409 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-01-25 03:39:25,699 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-01-25 03:39:25,699 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2018-01-25 03:39:25,699 INFO L87 Difference]: Start difference. First operand 323 states and 339 transitions. Second operand 10 states. [2018-01-25 03:39:26,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-25 03:39:26,425 INFO L93 Difference]: Finished difference Result 347 states and 363 transitions. [2018-01-25 03:39:26,425 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-01-25 03:39:26,426 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 48 [2018-01-25 03:39:26,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-25 03:39:26,428 INFO L225 Difference]: With dead ends: 347 [2018-01-25 03:39:26,428 INFO L226 Difference]: Without dead ends: 346 [2018-01-25 03:39:26,428 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2018-01-25 03:39:26,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2018-01-25 03:39:26,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 323. [2018-01-25 03:39:26,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 323 states. [2018-01-25 03:39:26,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 338 transitions. [2018-01-25 03:39:26,442 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 338 transitions. Word has length 48 [2018-01-25 03:39:26,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-25 03:39:26,442 INFO L432 AbstractCegarLoop]: Abstraction has 323 states and 338 transitions. [2018-01-25 03:39:26,442 INFO L433 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-01-25 03:39:26,442 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 338 transitions. [2018-01-25 03:39:26,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-01-25 03:39:26,443 INFO L314 BasicCegarLoop]: Found error trace [2018-01-25 03:39:26,444 INFO L322 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-25 03:39:26,444 INFO L371 AbstractCegarLoop]: === Iteration 15 === [merge_pairErr19RequiresViolation, merge_pairErr24RequiresViolation, merge_pairErr4RequiresViolation, merge_pairErr11RequiresViolation, merge_pairErr16RequiresViolation, merge_pairErr7RequiresViolation, merge_pairErr9RequiresViolation, merge_pairErr2RequiresViolation, merge_pairErr14RequiresViolation, merge_pairErr29RequiresViolation, merge_pairErr17RequiresViolation, merge_pairErr6RequiresViolation, merge_pairErr27RequiresViolation, merge_pairErr26RequiresViolation, merge_pairErr3RequiresViolation, merge_pairErr13RequiresViolation, merge_pairErr23RequiresViolation, merge_pairErr15RequiresViolation, merge_pairErr0RequiresViolation, merge_pairErr10RequiresViolation, merge_pairErr25RequiresViolation, merge_pairErr20RequiresViolation, merge_pairErr22RequiresViolation, merge_pairErr12RequiresViolation, merge_pairErr5RequiresViolation, merge_pairErr18RequiresViolation, merge_pairErr21RequiresViolation, merge_pairErr1RequiresViolation, merge_pairErr28RequiresViolation, merge_pairErr8RequiresViolation, merge_single_nodeErr4RequiresViolation, merge_single_nodeErr0RequiresViolation, merge_single_nodeErr9RequiresViolation, merge_single_nodeErr7RequiresViolation, merge_single_nodeErr11RequiresViolation, merge_single_nodeErr2RequiresViolation, merge_single_nodeErr1RequiresViolation, merge_single_nodeErr13RequiresViolation, merge_single_nodeErr6RequiresViolation, merge_single_nodeErr5RequiresViolation, merge_single_nodeErr10RequiresViolation, merge_single_nodeErr3RequiresViolation, merge_single_nodeErr12RequiresViolation, merge_single_nodeErr8RequiresViolation, seq_sort_coreErr13RequiresViolation, seq_sort_coreErr7RequiresViolation, seq_sort_coreErr6RequiresViolation, seq_sort_coreErr10RequiresViolation, seq_sort_coreErr1RequiresViolation, seq_sort_coreErr3RequiresViolation, seq_sort_coreErr8RequiresViolation, seq_sort_coreErr12RequiresViolation, seq_sort_coreErr11RequiresViolation, seq_sort_coreErr0RequiresViolation, seq_sort_coreErr4RequiresViolation, seq_sort_coreErr5RequiresViolation, seq_sort_coreErr2RequiresViolation, seq_sort_coreErr9RequiresViolation, inspect_beforeErr15RequiresViolation, inspect_beforeErr7RequiresViolation, inspect_beforeErr11RequiresViolation, inspect_beforeErr3RequiresViolation, inspect_beforeErr2RequiresViolation, inspect_beforeErr10RequiresViolation, inspect_beforeErr16RequiresViolation, inspect_beforeErr1RequiresViolation, inspect_beforeErr6RequiresViolation, inspect_beforeErr18RequiresViolation, inspect_beforeErr13RequiresViolation, inspect_beforeErr0RequiresViolation, inspect_beforeErr9RequiresViolation, inspect_beforeErr4RequiresViolation, inspect_beforeErr17RequiresViolation, inspect_beforeErr8RequiresViolation, inspect_beforeErr12RequiresViolation, inspect_beforeErr14RequiresViolation, inspect_beforeErr5RequiresViolation, inspect_beforeErr19RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr1RequiresViolation, mainErr17RequiresViolation, mainErr9RequiresViolation, mainErr18EnsuresViolation, mainErr0RequiresViolation, mainErr3RequiresViolation, mainErr7RequiresViolation, mainErr11RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr15RequiresViolation, mainErr16RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr14RequiresViolation, inspect_afterErr8RequiresViolation, inspect_afterErr10RequiresViolation, inspect_afterErr1RequiresViolation, inspect_afterErr0RequiresViolation, inspect_afterErr6RequiresViolation, inspect_afterErr7RequiresViolation, inspect_afterErr11RequiresViolation, inspect_afterErr5RequiresViolation, inspect_afterErr2RequiresViolation, inspect_afterErr4RequiresViolation, inspect_afterErr3RequiresViolation, inspect_afterErr9RequiresViolation]=== [2018-01-25 03:39:26,444 INFO L82 PathProgramCache]: Analyzing trace with hash 1300121728, now seen corresponding path program 1 times [2018-01-25 03:39:26,444 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-25 03:39:26,445 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 03:39:26,445 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-25 03:39:26,445 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 03:39:26,445 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-25 03:39:26,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-25 03:39:26,464 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-25 03:39:26,905 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-25 03:39:26,905 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-25 03:39:26,905 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-25 03:39:26,906 INFO L199 CegarAbsIntRunner]: Running AI on error trace of length 55 with the following transitions: [2018-01-25 03:39:26,907 INFO L201 CegarAbsIntRunner]: [74], [78], [84], [88], [96], [97], [98], [104], [108], [114], [118], [126], [127], [135], [139], [147], [148], [156], [160], [168], [169], [172], [180], [184], [190], [193], [282], [286], [288], [291], [293], [294], [295], [300], [302], [305], [306], [309], [310], [311], [316], [318], [321], [324], [331], [494], [495], [623], [641], [642], [643] [2018-01-25 03:39:26,965 INFO L147 AbstractInterpreter]: Using domain VPDomain [2018-01-25 03:39:26,965 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