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_smtcomp.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 06:12:17,096 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-25 06:12:17,097 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-25 06:12:17,112 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-25 06:12:17,113 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-25 06:12:17,113 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-25 06:12:17,114 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-25 06:12:17,115 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-25 06:12:17,118 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-25 06:12:17,119 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-25 06:12:17,120 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-01-25 06:12:17,120 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-01-25 06:12:17,121 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-01-25 06:12:17,123 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-01-25 06:12:17,124 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-01-25 06:12:17,126 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-01-25 06:12:17,129 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-01-25 06:12:17,131 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-01-25 06:12:17,132 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-01-25 06:12:17,133 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-01-25 06:12:17,136 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-01-25 06:12:17,136 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-01-25 06:12:17,136 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-01-25 06:12:17,137 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-01-25 06:12:17,138 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-01-25 06:12:17,140 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-01-25 06:12:17,140 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-01-25 06:12:17,140 INFO L177 SettingsManager]: PEA to Boogie provides no preferences, ignoring... [2018-01-25 06:12:17,141 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-01-25 06:12:17,141 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-01-25 06:12:17,142 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-01-25 06:12:17,142 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_smtcomp.epf [2018-01-25 06:12:17,153 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-25 06:12:17,153 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-25 06:12:17,154 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-25 06:12:17,154 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-25 06:12:17,154 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-25 06:12:17,154 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-25 06:12:17,155 INFO L133 SettingsManager]: * Precise comparison operator=true [2018-01-25 06:12:17,155 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-25 06:12:17,156 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-25 06:12:17,156 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-25 06:12:17,156 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-25 06:12:17,156 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-25 06:12:17,156 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-25 06:12:17,157 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-25 06:12:17,157 INFO L133 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2018-01-25 06:12:17,157 INFO L133 SettingsManager]: * Bitprecise bitfields=true [2018-01-25 06:12:17,157 INFO L133 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2018-01-25 06:12:17,157 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-25 06:12:17,157 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-25 06:12:17,158 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-25 06:12:17,158 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-01-25 06:12:17,158 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-25 06:12:17,158 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-25 06:12:17,158 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-25 06:12:17,159 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-25 06:12:17,159 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-25 06:12:17,159 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-25 06:12:17,159 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-25 06:12:17,159 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-25 06:12:17,160 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-01-25 06:12:17,160 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-25 06:12:17,160 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-25 06:12:17,160 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-25 06:12:17,160 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-01-25 06:12:17,161 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-25 06:12:17,161 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-25 06:12:17,197 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-25 06:12:17,211 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-25 06:12:17,215 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-25 06:12:17,217 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-25 06:12:17,217 INFO L276 PluginConnector]: CDTParser initialized [2018-01-25 06:12:17,218 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/heap-manipulation/merge_sort_true-unreach-call_true-valid-memsafety.i [2018-01-25 06:12:17,410 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-25 06:12:17,416 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-25 06:12:17,417 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-25 06:12:17,417 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-25 06:12:17,422 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-25 06:12:17,423 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.01 06:12:17" (1/1) ... [2018-01-25 06:12:17,426 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7fca372b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.01 06:12:17, skipping insertion in model container [2018-01-25 06:12:17,427 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.01 06:12:17" (1/1) ... [2018-01-25 06:12:17,448 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-25 06:12:17,493 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-25 06:12:17,617 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-25 06:12:17,647 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-25 06:12:17,656 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.01 06:12:17 WrapperNode [2018-01-25 06:12:17,656 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-25 06:12:17,657 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-25 06:12:17,657 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-25 06:12:17,657 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-25 06:12:17,668 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.01 06:12:17" (1/1) ... [2018-01-25 06:12:17,668 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.01 06:12:17" (1/1) ... [2018-01-25 06:12:17,678 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.01 06:12:17" (1/1) ... [2018-01-25 06:12:17,679 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.01 06:12:17" (1/1) ... [2018-01-25 06:12:17,691 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.01 06:12:17" (1/1) ... [2018-01-25 06:12:17,699 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.01 06:12:17" (1/1) ... [2018-01-25 06:12:17,702 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.01 06:12:17" (1/1) ... [2018-01-25 06:12:17,706 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-25 06:12:17,707 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-25 06:12:17,707 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-25 06:12:17,707 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-25 06:12:17,708 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.01 06:12:17" (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 06:12:17,754 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-25 06:12:17,754 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-25 06:12:17,754 INFO L136 BoogieDeclarations]: Found implementation of procedure fail [2018-01-25 06:12:17,755 INFO L136 BoogieDeclarations]: Found implementation of procedure merge_single_node [2018-01-25 06:12:17,755 INFO L136 BoogieDeclarations]: Found implementation of procedure merge_pair [2018-01-25 06:12:17,755 INFO L136 BoogieDeclarations]: Found implementation of procedure seq_sort_core [2018-01-25 06:12:17,755 INFO L136 BoogieDeclarations]: Found implementation of procedure inspect_before [2018-01-25 06:12:17,755 INFO L136 BoogieDeclarations]: Found implementation of procedure inspect_after [2018-01-25 06:12:17,755 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-25 06:12:17,755 INFO L128 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2018-01-25 06:12:17,755 INFO L128 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2018-01-25 06:12:17,755 INFO L128 BoogieDeclarations]: Found specification of procedure write~int [2018-01-25 06:12:17,756 INFO L128 BoogieDeclarations]: Found specification of procedure read~int [2018-01-25 06:12:17,756 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-01-25 06:12:17,756 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-01-25 06:12:17,756 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-01-25 06:12:17,756 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2018-01-25 06:12:17,756 INFO L128 BoogieDeclarations]: Found specification of procedure free [2018-01-25 06:12:17,756 INFO L128 BoogieDeclarations]: Found specification of procedure abort [2018-01-25 06:12:17,756 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-01-25 06:12:17,756 INFO L128 BoogieDeclarations]: Found specification of procedure fail [2018-01-25 06:12:17,756 INFO L128 BoogieDeclarations]: Found specification of procedure merge_single_node [2018-01-25 06:12:17,757 INFO L128 BoogieDeclarations]: Found specification of procedure merge_pair [2018-01-25 06:12:17,757 INFO L128 BoogieDeclarations]: Found specification of procedure seq_sort_core [2018-01-25 06:12:17,757 INFO L128 BoogieDeclarations]: Found specification of procedure inspect_before [2018-01-25 06:12:17,757 INFO L128 BoogieDeclarations]: Found specification of procedure inspect_after [2018-01-25 06:12:17,757 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-25 06:12:17,757 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-25 06:12:17,757 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-25 06:12:18,677 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-25 06:12:18,678 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.01 06:12:18 BoogieIcfgContainer [2018-01-25 06:12:18,678 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-25 06:12:18,679 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-01-25 06:12:18,679 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-01-25 06:12:18,681 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-01-25 06:12:18,681 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.01 06:12:17" (1/3) ... [2018-01-25 06:12:18,683 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7da1c660 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.01 06:12:18, skipping insertion in model container [2018-01-25 06:12:18,683 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.01 06:12:17" (2/3) ... [2018-01-25 06:12:18,683 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7da1c660 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.01 06:12:18, skipping insertion in model container [2018-01-25 06:12:18,683 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.01 06:12:18" (3/3) ... [2018-01-25 06:12:18,685 INFO L105 eAbstractionObserver]: Analyzing ICFG merge_sort_true-unreach-call_true-valid-memsafety.i [2018-01-25 06:12:18,692 INFO L130 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-01-25 06:12:18,699 INFO L142 ceAbstractionStarter]: Appying trace abstraction to program that has 109 error locations. [2018-01-25 06:12:18,758 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-25 06:12:18,758 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-25 06:12:18,758 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-25 06:12:18,758 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-25 06:12:18,758 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-25 06:12:18,759 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-25 06:12:18,759 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-25 06:12:18,759 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-01-25 06:12:18,760 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-25 06:12:18,790 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states. [2018-01-25 06:12:18,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-01-25 06:12:18,797 INFO L314 BasicCegarLoop]: Found error trace [2018-01-25 06:12:18,798 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-25 06:12:18,799 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 06:12:18,805 INFO L82 PathProgramCache]: Analyzing trace with hash 1556477250, now seen corresponding path program 1 times [2018-01-25 06:12:18,807 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-25 06:12:18,870 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 06:12:18,870 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-25 06:12:18,870 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 06:12:18,871 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-25 06:12:18,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-25 06:12:18,923 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-25 06:12:18,952 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 06:12:18,955 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-25 06:12:18,955 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-25 06:12:18,955 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-25 06:12:19,053 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-25 06:12:19,064 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-25 06:12:19,065 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-25 06:12:19,067 INFO L87 Difference]: Start difference. First operand 315 states. Second operand 2 states. [2018-01-25 06:12:19,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-25 06:12:19,127 INFO L93 Difference]: Finished difference Result 622 states and 773 transitions. [2018-01-25 06:12:19,127 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-25 06:12:19,129 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 9 [2018-01-25 06:12:19,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-25 06:12:19,143 INFO L225 Difference]: With dead ends: 622 [2018-01-25 06:12:19,144 INFO L226 Difference]: Without dead ends: 296 [2018-01-25 06:12:19,150 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 06:12:19,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2018-01-25 06:12:19,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 296. [2018-01-25 06:12:19,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 296 states. [2018-01-25 06:12:19,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 309 transitions. [2018-01-25 06:12:19,208 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 309 transitions. Word has length 9 [2018-01-25 06:12:19,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-25 06:12:19,208 INFO L432 AbstractCegarLoop]: Abstraction has 296 states and 309 transitions. [2018-01-25 06:12:19,208 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-25 06:12:19,209 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 309 transitions. [2018-01-25 06:12:19,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-01-25 06:12:19,209 INFO L314 BasicCegarLoop]: Found error trace [2018-01-25 06:12:19,209 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-25 06:12:19,210 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 06:12:19,210 INFO L82 PathProgramCache]: Analyzing trace with hash 1087749341, now seen corresponding path program 1 times [2018-01-25 06:12:19,210 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-25 06:12:19,211 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 06:12:19,211 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-25 06:12:19,211 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 06:12:19,211 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-25 06:12:19,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-25 06:12:19,222 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-25 06:12:19,265 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 06:12:19,265 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-25 06:12:19,265 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-25 06:12:19,265 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-25 06:12:19,267 INFO L409 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-01-25 06:12:19,267 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-01-25 06:12:19,267 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-01-25 06:12:19,267 INFO L87 Difference]: Start difference. First operand 296 states and 309 transitions. Second operand 3 states. [2018-01-25 06:12:19,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-25 06:12:19,592 INFO L93 Difference]: Finished difference Result 340 states and 362 transitions. [2018-01-25 06:12:19,592 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-01-25 06:12:19,592 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2018-01-25 06:12:19,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-25 06:12:19,595 INFO L225 Difference]: With dead ends: 340 [2018-01-25 06:12:19,596 INFO L226 Difference]: Without dead ends: 338 [2018-01-25 06:12:19,597 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 06:12:19,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2018-01-25 06:12:19,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 300. [2018-01-25 06:12:19,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 300 states. [2018-01-25 06:12:19,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 314 transitions. [2018-01-25 06:12:19,621 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 314 transitions. Word has length 11 [2018-01-25 06:12:19,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-25 06:12:19,622 INFO L432 AbstractCegarLoop]: Abstraction has 300 states and 314 transitions. [2018-01-25 06:12:19,622 INFO L433 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-01-25 06:12:19,622 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 314 transitions. [2018-01-25 06:12:19,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-01-25 06:12:19,622 INFO L314 BasicCegarLoop]: Found error trace [2018-01-25 06:12:19,623 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-25 06:12:19,623 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 06:12:19,623 INFO L82 PathProgramCache]: Analyzing trace with hash 1650764336, now seen corresponding path program 1 times [2018-01-25 06:12:19,623 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-25 06:12:19,624 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 06:12:19,624 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-25 06:12:19,625 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 06:12:19,625 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-25 06:12:19,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-25 06:12:19,645 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-25 06:12:19,711 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 06:12:19,711 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-25 06:12:19,711 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-25 06:12:19,712 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-25 06:12:19,712 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-25 06:12:19,712 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-25 06:12:19,712 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-25 06:12:19,713 INFO L87 Difference]: Start difference. First operand 300 states and 314 transitions. Second operand 4 states. [2018-01-25 06:12:19,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-25 06:12:19,957 INFO L93 Difference]: Finished difference Result 330 states and 348 transitions. [2018-01-25 06:12:19,958 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-01-25 06:12:19,958 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2018-01-25 06:12:19,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-25 06:12:19,961 INFO L225 Difference]: With dead ends: 330 [2018-01-25 06:12:19,961 INFO L226 Difference]: Without dead ends: 328 [2018-01-25 06:12:19,961 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 06:12:19,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2018-01-25 06:12:19,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 298. [2018-01-25 06:12:19,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 298 states. [2018-01-25 06:12:19,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 312 transitions. [2018-01-25 06:12:19,982 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 312 transitions. Word has length 13 [2018-01-25 06:12:19,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-25 06:12:19,982 INFO L432 AbstractCegarLoop]: Abstraction has 298 states and 312 transitions. [2018-01-25 06:12:19,982 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-25 06:12:19,983 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 312 transitions. [2018-01-25 06:12:19,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-01-25 06:12:19,983 INFO L314 BasicCegarLoop]: Found error trace [2018-01-25 06:12:19,983 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-25 06:12:19,984 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 06:12:19,984 INFO L82 PathProgramCache]: Analyzing trace with hash 1650764335, now seen corresponding path program 1 times [2018-01-25 06:12:19,984 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-25 06:12:19,985 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 06:12:19,985 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-25 06:12:19,985 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 06:12:19,986 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-25 06:12:19,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-25 06:12:19,996 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-25 06:12:20,019 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 06:12:20,020 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-25 06:12:20,020 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-25 06:12:20,020 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-25 06:12:20,021 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-25 06:12:20,021 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-25 06:12:20,021 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-25 06:12:20,021 INFO L87 Difference]: Start difference. First operand 298 states and 312 transitions. Second operand 4 states. [2018-01-25 06:12:20,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-25 06:12:20,309 INFO L93 Difference]: Finished difference Result 317 states and 334 transitions. [2018-01-25 06:12:20,310 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-01-25 06:12:20,310 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2018-01-25 06:12:20,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-25 06:12:20,311 INFO L225 Difference]: With dead ends: 317 [2018-01-25 06:12:20,312 INFO L226 Difference]: Without dead ends: 315 [2018-01-25 06:12:20,312 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 06:12:20,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2018-01-25 06:12:20,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 296. [2018-01-25 06:12:20,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 296 states. [2018-01-25 06:12:20,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 310 transitions. [2018-01-25 06:12:20,324 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 310 transitions. Word has length 13 [2018-01-25 06:12:20,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-25 06:12:20,324 INFO L432 AbstractCegarLoop]: Abstraction has 296 states and 310 transitions. [2018-01-25 06:12:20,324 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-25 06:12:20,324 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 310 transitions. [2018-01-25 06:12:20,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-01-25 06:12:20,325 INFO L314 BasicCegarLoop]: Found error trace [2018-01-25 06:12:20,325 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 06:12:20,325 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 06:12:20,325 INFO L82 PathProgramCache]: Analyzing trace with hash 45229303, now seen corresponding path program 1 times [2018-01-25 06:12:20,325 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-25 06:12:20,326 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 06:12:20,326 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-25 06:12:20,326 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 06:12:20,327 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-25 06:12:20,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-25 06:12:20,334 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-25 06:12:20,352 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 06:12:20,352 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-25 06:12:20,353 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-25 06:12:20,353 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-25 06:12:20,353 INFO L409 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-01-25 06:12:20,353 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-01-25 06:12:20,353 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-01-25 06:12:20,353 INFO L87 Difference]: Start difference. First operand 296 states and 310 transitions. Second operand 3 states. [2018-01-25 06:12:20,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-25 06:12:20,381 INFO L93 Difference]: Finished difference Result 580 states and 604 transitions. [2018-01-25 06:12:20,381 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-01-25 06:12:20,381 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2018-01-25 06:12:20,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-25 06:12:20,383 INFO L225 Difference]: With dead ends: 580 [2018-01-25 06:12:20,383 INFO L226 Difference]: Without dead ends: 314 [2018-01-25 06:12:20,384 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 06:12:20,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2018-01-25 06:12:20,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 295. [2018-01-25 06:12:20,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 295 states. [2018-01-25 06:12:20,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 308 transitions. [2018-01-25 06:12:20,393 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 308 transitions. Word has length 17 [2018-01-25 06:12:20,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-25 06:12:20,393 INFO L432 AbstractCegarLoop]: Abstraction has 295 states and 308 transitions. [2018-01-25 06:12:20,393 INFO L433 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-01-25 06:12:20,393 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 308 transitions. [2018-01-25 06:12:20,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-01-25 06:12:20,394 INFO L314 BasicCegarLoop]: Found error trace [2018-01-25 06:12:20,394 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 06:12:20,394 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 06:12:20,394 INFO L82 PathProgramCache]: Analyzing trace with hash 963226955, now seen corresponding path program 1 times [2018-01-25 06:12:20,394 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-25 06:12:20,395 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 06:12:20,395 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-25 06:12:20,395 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 06:12:20,395 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-25 06:12:20,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-25 06:12:20,412 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-25 06:12:20,487 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 06:12:20,487 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-25 06:12:20,487 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-25 06:12:20,487 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-25 06:12:20,488 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-25 06:12:20,488 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-25 06:12:20,488 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-25 06:12:20,488 INFO L87 Difference]: Start difference. First operand 295 states and 308 transitions. Second operand 4 states. [2018-01-25 06:12:20,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-25 06:12:20,671 INFO L93 Difference]: Finished difference Result 331 states and 347 transitions. [2018-01-25 06:12:20,671 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-01-25 06:12:20,671 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2018-01-25 06:12:20,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-25 06:12:20,673 INFO L225 Difference]: With dead ends: 331 [2018-01-25 06:12:20,673 INFO L226 Difference]: Without dead ends: 329 [2018-01-25 06:12:20,673 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 06:12:20,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2018-01-25 06:12:20,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 293. [2018-01-25 06:12:20,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 293 states. [2018-01-25 06:12:20,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 306 transitions. [2018-01-25 06:12:20,683 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 306 transitions. Word has length 20 [2018-01-25 06:12:20,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-25 06:12:20,683 INFO L432 AbstractCegarLoop]: Abstraction has 293 states and 306 transitions. [2018-01-25 06:12:20,684 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-25 06:12:20,684 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 306 transitions. [2018-01-25 06:12:20,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-01-25 06:12:20,684 INFO L314 BasicCegarLoop]: Found error trace [2018-01-25 06:12:20,684 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-25 06:12:20,684 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 06:12:20,684 INFO L82 PathProgramCache]: Analyzing trace with hash 963226954, now seen corresponding path program 1 times [2018-01-25 06:12:20,685 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-25 06:12:20,685 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 06:12:20,685 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-25 06:12:20,686 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 06:12:20,686 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-25 06:12:20,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-25 06:12:20,699 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-25 06:12:20,724 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 06:12:20,724 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-25 06:12:20,724 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-25 06:12:20,724 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-25 06:12:20,724 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-25 06:12:20,725 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-25 06:12:20,725 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-25 06:12:20,725 INFO L87 Difference]: Start difference. First operand 293 states and 306 transitions. Second operand 4 states. [2018-01-25 06:12:21,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-25 06:12:21,102 INFO L93 Difference]: Finished difference Result 318 states and 333 transitions. [2018-01-25 06:12:21,102 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-01-25 06:12:21,102 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2018-01-25 06:12:21,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-25 06:12:21,104 INFO L225 Difference]: With dead ends: 318 [2018-01-25 06:12:21,104 INFO L226 Difference]: Without dead ends: 316 [2018-01-25 06:12:21,104 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 06:12:21,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2018-01-25 06:12:21,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 291. [2018-01-25 06:12:21,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 291 states. [2018-01-25 06:12:21,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 304 transitions. [2018-01-25 06:12:21,113 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 304 transitions. Word has length 20 [2018-01-25 06:12:21,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-25 06:12:21,113 INFO L432 AbstractCegarLoop]: Abstraction has 291 states and 304 transitions. [2018-01-25 06:12:21,114 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-25 06:12:21,114 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 304 transitions. [2018-01-25 06:12:21,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-01-25 06:12:21,114 INFO L314 BasicCegarLoop]: Found error trace [2018-01-25 06:12:21,114 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 06:12:21,114 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 06:12:21,115 INFO L82 PathProgramCache]: Analyzing trace with hash 1725402921, now seen corresponding path program 1 times [2018-01-25 06:12:21,115 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-25 06:12:21,116 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 06:12:21,116 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-25 06:12:21,116 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 06:12:21,116 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-25 06:12:21,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-25 06:12:21,132 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-25 06:12:21,199 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 06:12:21,199 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-25 06:12:21,199 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-25 06:12:21,199 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-25 06:12:21,200 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-25 06:12:21,200 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-25 06:12:21,251 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-01-25 06:12:21,252 INFO L87 Difference]: Start difference. First operand 291 states and 304 transitions. Second operand 5 states. [2018-01-25 06:12:21,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-25 06:12:21,375 INFO L93 Difference]: Finished difference Result 333 states and 349 transitions. [2018-01-25 06:12:21,375 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-25 06:12:21,375 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 27 [2018-01-25 06:12:21,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-25 06:12:21,376 INFO L225 Difference]: With dead ends: 333 [2018-01-25 06:12:21,377 INFO L226 Difference]: Without dead ends: 331 [2018-01-25 06:12:21,377 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 06:12:21,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2018-01-25 06:12:21,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 291. [2018-01-25 06:12:21,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 291 states. [2018-01-25 06:12:21,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 303 transitions. [2018-01-25 06:12:21,386 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 303 transitions. Word has length 27 [2018-01-25 06:12:21,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-25 06:12:21,386 INFO L432 AbstractCegarLoop]: Abstraction has 291 states and 303 transitions. [2018-01-25 06:12:21,386 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-25 06:12:21,387 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 303 transitions. [2018-01-25 06:12:21,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-01-25 06:12:21,387 INFO L314 BasicCegarLoop]: Found error trace [2018-01-25 06:12:21,387 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 06:12:21,388 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 06:12:21,388 INFO L82 PathProgramCache]: Analyzing trace with hash 1961365059, now seen corresponding path program 1 times [2018-01-25 06:12:21,388 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-25 06:12:21,389 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 06:12:21,389 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-25 06:12:21,389 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 06:12:21,389 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-25 06:12:21,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-25 06:12:21,403 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-25 06:12:21,502 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 06:12:21,502 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-25 06:12:21,503 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-25 06:12:21,503 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-25 06:12:21,503 INFO L409 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-01-25 06:12:21,503 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-01-25 06:12:21,503 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-01-25 06:12:21,504 INFO L87 Difference]: Start difference. First operand 291 states and 303 transitions. Second operand 6 states. [2018-01-25 06:12:22,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-25 06:12:22,197 INFO L93 Difference]: Finished difference Result 320 states and 337 transitions. [2018-01-25 06:12:22,197 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-01-25 06:12:22,198 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 33 [2018-01-25 06:12:22,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-25 06:12:22,200 INFO L225 Difference]: With dead ends: 320 [2018-01-25 06:12:22,200 INFO L226 Difference]: Without dead ends: 309 [2018-01-25 06:12:22,201 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2018-01-25 06:12:22,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2018-01-25 06:12:22,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 286. [2018-01-25 06:12:22,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 286 states. [2018-01-25 06:12:22,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 300 transitions. [2018-01-25 06:12:22,220 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 300 transitions. Word has length 33 [2018-01-25 06:12:22,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-25 06:12:22,221 INFO L432 AbstractCegarLoop]: Abstraction has 286 states and 300 transitions. [2018-01-25 06:12:22,221 INFO L433 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-01-25 06:12:22,221 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 300 transitions. [2018-01-25 06:12:22,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-01-25 06:12:22,222 INFO L314 BasicCegarLoop]: Found error trace [2018-01-25 06:12:22,222 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 06:12:22,222 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 06:12:22,222 INFO L82 PathProgramCache]: Analyzing trace with hash 1961365060, now seen corresponding path program 1 times [2018-01-25 06:12:22,222 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-25 06:12:22,223 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 06:12:22,223 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-25 06:12:22,223 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 06:12:22,223 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-25 06:12:22,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-25 06:12:22,239 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-25 06:12:22,472 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 06:12:22,472 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-25 06:12:22,472 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-01-25 06:12:22,472 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-25 06:12:22,473 INFO L409 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-01-25 06:12:22,473 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-01-25 06:12:22,473 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-01-25 06:12:22,473 INFO L87 Difference]: Start difference. First operand 286 states and 300 transitions. Second operand 7 states. [2018-01-25 06:12:22,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-25 06:12:22,913 INFO L93 Difference]: Finished difference Result 370 states and 386 transitions. [2018-01-25 06:12:22,913 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-01-25 06:12:22,913 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 33 [2018-01-25 06:12:22,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-25 06:12:22,915 INFO L225 Difference]: With dead ends: 370 [2018-01-25 06:12:22,915 INFO L226 Difference]: Without dead ends: 359 [2018-01-25 06:12:22,916 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2018-01-25 06:12:22,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2018-01-25 06:12:22,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 322. [2018-01-25 06:12:22,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 322 states. [2018-01-25 06:12:22,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 339 transitions. [2018-01-25 06:12:22,930 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 339 transitions. Word has length 33 [2018-01-25 06:12:22,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-25 06:12:22,931 INFO L432 AbstractCegarLoop]: Abstraction has 322 states and 339 transitions. [2018-01-25 06:12:22,931 INFO L433 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-01-25 06:12:22,931 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 339 transitions. [2018-01-25 06:12:22,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-01-25 06:12:22,932 INFO L314 BasicCegarLoop]: Found error trace [2018-01-25 06:12:22,933 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 06:12:22,933 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 06:12:22,933 INFO L82 PathProgramCache]: Analyzing trace with hash 816569686, now seen corresponding path program 1 times [2018-01-25 06:12:22,933 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-25 06:12:22,934 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 06:12:22,934 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-25 06:12:22,934 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 06:12:22,935 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-25 06:12:22,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-25 06:12:22,958 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-25 06:12:23,194 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 06:12:23,194 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-25 06:12:23,194 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2018-01-25 06:12:23,195 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-25 06:12:23,195 INFO L409 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-01-25 06:12:23,195 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-01-25 06:12:23,195 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2018-01-25 06:12:23,196 INFO L87 Difference]: Start difference. First operand 322 states and 339 transitions. Second operand 12 states. [2018-01-25 06:12:23,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-25 06:12:23,989 INFO L93 Difference]: Finished difference Result 337 states and 353 transitions. [2018-01-25 06:12:23,989 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-01-25 06:12:23,989 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 48 [2018-01-25 06:12:23,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-25 06:12:23,991 INFO L225 Difference]: With dead ends: 337 [2018-01-25 06:12:23,991 INFO L226 Difference]: Without dead ends: 336 [2018-01-25 06:12:23,992 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2018-01-25 06:12:23,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2018-01-25 06:12:24,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 323. [2018-01-25 06:12:24,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 323 states. [2018-01-25 06:12:24,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 341 transitions. [2018-01-25 06:12:24,001 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 341 transitions. Word has length 48 [2018-01-25 06:12:24,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-25 06:12:24,002 INFO L432 AbstractCegarLoop]: Abstraction has 323 states and 341 transitions. [2018-01-25 06:12:24,002 INFO L433 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-01-25 06:12:24,002 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 341 transitions. [2018-01-25 06:12:24,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-01-25 06:12:24,003 INFO L314 BasicCegarLoop]: Found error trace [2018-01-25 06:12:24,003 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 06:12:24,003 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 06:12:24,003 INFO L82 PathProgramCache]: Analyzing trace with hash 816569687, now seen corresponding path program 1 times [2018-01-25 06:12:24,003 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-25 06:12:24,004 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 06:12:24,004 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-25 06:12:24,004 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 06:12:24,004 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-25 06:12:24,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-25 06:12:24,020 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-25 06:12:24,236 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 06:12:24,236 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-25 06:12:24,236 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2018-01-25 06:12:24,236 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-25 06:12:24,237 INFO L409 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-01-25 06:12:24,237 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-01-25 06:12:24,237 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2018-01-25 06:12:24,237 INFO L87 Difference]: Start difference. First operand 323 states and 341 transitions. Second operand 10 states. [2018-01-25 06:12:24,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-25 06:12:24,938 INFO L93 Difference]: Finished difference Result 349 states and 365 transitions. [2018-01-25 06:12:24,938 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-01-25 06:12:24,938 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 48 [2018-01-25 06:12:24,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-25 06:12:24,940 INFO L225 Difference]: With dead ends: 349 [2018-01-25 06:12:24,940 INFO L226 Difference]: Without dead ends: 348 [2018-01-25 06:12:24,940 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 06:12:24,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2018-01-25 06:12:24,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 323. [2018-01-25 06:12:24,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 323 states. [2018-01-25 06:12:24,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 340 transitions. [2018-01-25 06:12:24,952 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 340 transitions. Word has length 48 [2018-01-25 06:12:24,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-25 06:12:24,953 INFO L432 AbstractCegarLoop]: Abstraction has 323 states and 340 transitions. [2018-01-25 06:12:24,953 INFO L433 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-01-25 06:12:24,953 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 340 transitions. [2018-01-25 06:12:24,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-01-25 06:12:24,954 INFO L314 BasicCegarLoop]: Found error trace [2018-01-25 06:12:24,954 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 06:12:24,954 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 06:12:24,954 INFO L82 PathProgramCache]: Analyzing trace with hash 1119918648, now seen corresponding path program 1 times [2018-01-25 06:12:24,954 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-25 06:12:24,955 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 06:12:24,956 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-25 06:12:24,956 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 06:12:24,956 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-25 06:12:24,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-25 06:12:24,970 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-25 06:12:25,441 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 06:12:25,441 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-25 06:12:25,442 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2018-01-25 06:12:25,442 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-25 06:12:25,442 INFO L409 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-01-25 06:12:25,442 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-01-25 06:12:25,442 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2018-01-25 06:12:25,442 INFO L87 Difference]: Start difference. First operand 323 states and 340 transitions. Second operand 12 states. [2018-01-25 06:12:26,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-25 06:12:26,320 INFO L93 Difference]: Finished difference Result 335 states and 351 transitions. [2018-01-25 06:12:26,362 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-01-25 06:12:26,362 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 48 [2018-01-25 06:12:26,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-25 06:12:26,364 INFO L225 Difference]: With dead ends: 335 [2018-01-25 06:12:26,364 INFO L226 Difference]: Without dead ends: 334 [2018-01-25 06:12:26,365 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2018-01-25 06:12:26,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2018-01-25 06:12:26,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 323. [2018-01-25 06:12:26,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 323 states. [2018-01-25 06:12:26,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 339 transitions. [2018-01-25 06:12:26,377 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 339 transitions. Word has length 48 [2018-01-25 06:12:26,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-25 06:12:26,378 INFO L432 AbstractCegarLoop]: Abstraction has 323 states and 339 transitions. [2018-01-25 06:12:26,378 INFO L433 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-01-25 06:12:26,378 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 339 transitions. [2018-01-25 06:12:26,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-01-25 06:12:26,379 INFO L314 BasicCegarLoop]: Found error trace [2018-01-25 06:12:26,379 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 06:12:26,379 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 06:12:26,380 INFO L82 PathProgramCache]: Analyzing trace with hash 1119918649, now seen corresponding path program 1 times [2018-01-25 06:12:26,380 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-25 06:12:26,381 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 06:12:26,381 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-25 06:12:26,381 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 06:12:26,381 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-25 06:12:26,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-25 06:12:26,397 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-25 06:12:26,601 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 06:12:26,601 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-25 06:12:26,602 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2018-01-25 06:12:26,602 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-25 06:12:26,602 INFO L409 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-01-25 06:12:26,602 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-01-25 06:12:26,602 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2018-01-25 06:12:26,602 INFO L87 Difference]: Start difference. First operand 323 states and 339 transitions. Second operand 10 states. [2018-01-25 06:12:27,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-25 06:12:27,287 INFO L93 Difference]: Finished difference Result 347 states and 363 transitions. [2018-01-25 06:12:27,287 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-01-25 06:12:27,287 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 48 [2018-01-25 06:12:27,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-25 06:12:27,289 INFO L225 Difference]: With dead ends: 347 [2018-01-25 06:12:27,289 INFO L226 Difference]: Without dead ends: 346 [2018-01-25 06:12:27,289 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 06:12:27,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2018-01-25 06:12:27,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 323. [2018-01-25 06:12:27,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 323 states. [2018-01-25 06:12:27,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 338 transitions. [2018-01-25 06:12:27,300 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 338 transitions. Word has length 48 [2018-01-25 06:12:27,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-25 06:12:27,300 INFO L432 AbstractCegarLoop]: Abstraction has 323 states and 338 transitions. [2018-01-25 06:12:27,300 INFO L433 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-01-25 06:12:27,300 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 338 transitions. [2018-01-25 06:12:27,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-01-25 06:12:27,301 INFO L314 BasicCegarLoop]: Found error trace [2018-01-25 06:12:27,301 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 06:12:27,301 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 06:12:27,301 INFO L82 PathProgramCache]: Analyzing trace with hash 1300121728, now seen corresponding path program 1 times [2018-01-25 06:12:27,302 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-25 06:12:27,302 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 06:12:27,302 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-25 06:12:27,303 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 06:12:27,303 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-25 06:12:27,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-25 06:12:27,315 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-25 06:12:27,698 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 06:12:27,698 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-25 06:12:27,698 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-25 06:12:27,699 INFO L199 CegarAbsIntRunner]: Running AI on error trace of length 55 with the following transitions: [2018-01-25 06:12:27,701 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 06:12:27,749 INFO L147 AbstractInterpreter]: Using domain VPDomain [2018-01-25 06:12:27,749 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