java -Xmx6000000000 -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data ./data --generate-csv --csv-dir ../../../releaseScripts/default/UAutomizer-linux/csv -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/ai/eq-bench/svcomp-DerefFreeMemtrack-32bit-Automizer_Taipan+AI_EQ.epf -i ../../../trunk/examples/svcomp/heap-manipulation/merge_sort_true-unreach-call_true-valid-memsafety.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-6b94a2f [2018-01-24 16:03:19,095 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-24 16:03:19,097 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-24 16:03:19,111 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-24 16:03:19,111 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-24 16:03:19,112 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-24 16:03:19,113 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-24 16:03:19,115 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-24 16:03:19,117 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-24 16:03:19,118 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-24 16:03:19,119 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-01-24 16:03:19,119 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-01-24 16:03:19,120 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-01-24 16:03:19,120 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-01-24 16:03:19,121 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-01-24 16:03:19,123 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-01-24 16:03:19,126 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-01-24 16:03:19,128 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-01-24 16:03:19,129 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-01-24 16:03:19,131 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-01-24 16:03:19,133 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-01-24 16:03:19,133 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-01-24 16:03:19,134 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-01-24 16:03:19,135 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-01-24 16:03:19,135 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-01-24 16:03:19,137 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-01-24 16:03:19,137 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-01-24 16:03:19,138 INFO L177 SettingsManager]: PEA to Boogie provides no preferences, ignoring... [2018-01-24 16:03:19,138 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-01-24 16:03:19,138 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-01-24 16:03:19,139 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-01-24 16:03:19,139 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/eq-bench/svcomp-DerefFreeMemtrack-32bit-Automizer_Taipan+AI_EQ.epf [2018-01-24 16:03:19,149 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-24 16:03:19,150 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-24 16:03:19,150 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-24 16:03:19,151 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-24 16:03:19,151 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-24 16:03:19,151 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-24 16:03:19,151 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-24 16:03:19,152 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-24 16:03:19,152 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-24 16:03:19,152 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-24 16:03:19,153 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-24 16:03:19,153 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-24 16:03:19,153 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-24 16:03:19,153 INFO L133 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2018-01-24 16:03:19,153 INFO L133 SettingsManager]: * Bitprecise bitfields=true [2018-01-24 16:03:19,154 INFO L133 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2018-01-24 16:03:19,154 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-24 16:03:19,154 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-24 16:03:19,154 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-24 16:03:19,154 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-01-24 16:03:19,155 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-24 16:03:19,155 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-24 16:03:19,155 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-24 16:03:19,155 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-24 16:03:19,155 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-24 16:03:19,156 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-24 16:03:19,156 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-24 16:03:19,156 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-24 16:03:19,156 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-01-24 16:03:19,156 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-24 16:03:19,157 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-24 16:03:19,157 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-24 16:03:19,157 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-01-24 16:03:19,158 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-24 16:03:19,158 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-24 16:03:19,191 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-24 16:03:19,200 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-24 16:03:19,204 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-24 16:03:19,205 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-24 16:03:19,205 INFO L276 PluginConnector]: CDTParser initialized [2018-01-24 16:03:19,206 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/heap-manipulation/merge_sort_true-unreach-call_true-valid-memsafety.i [2018-01-24 16:03:19,376 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-24 16:03:19,383 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-24 16:03:19,384 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-24 16:03:19,384 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-24 16:03:19,390 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-24 16:03:19,391 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.01 04:03:19" (1/1) ... [2018-01-24 16:03:19,394 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7974cc89 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 04:03:19, skipping insertion in model container [2018-01-24 16:03:19,395 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.01 04:03:19" (1/1) ... [2018-01-24 16:03:19,415 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-24 16:03:19,459 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-24 16:03:19,577 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-24 16:03:19,607 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-24 16:03:19,620 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 04:03:19 WrapperNode [2018-01-24 16:03:19,620 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-24 16:03:19,621 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-24 16:03:19,621 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-24 16:03:19,621 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-24 16:03:19,634 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 04:03:19" (1/1) ... [2018-01-24 16:03:19,634 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 04:03:19" (1/1) ... [2018-01-24 16:03:19,645 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 04:03:19" (1/1) ... [2018-01-24 16:03:19,645 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 04:03:19" (1/1) ... [2018-01-24 16:03:19,655 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 04:03:19" (1/1) ... [2018-01-24 16:03:19,661 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 04:03:19" (1/1) ... [2018-01-24 16:03:19,663 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 04:03:19" (1/1) ... [2018-01-24 16:03:19,666 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-24 16:03:19,667 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-24 16:03:19,667 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-24 16:03:19,667 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-24 16:03:19,668 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 04:03:19" (1/1) ... No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-24 16:03:19,718 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-24 16:03:19,718 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-24 16:03:19,719 INFO L136 BoogieDeclarations]: Found implementation of procedure fail [2018-01-24 16:03:19,719 INFO L136 BoogieDeclarations]: Found implementation of procedure merge_single_node [2018-01-24 16:03:19,719 INFO L136 BoogieDeclarations]: Found implementation of procedure merge_pair [2018-01-24 16:03:19,719 INFO L136 BoogieDeclarations]: Found implementation of procedure seq_sort_core [2018-01-24 16:03:19,719 INFO L136 BoogieDeclarations]: Found implementation of procedure inspect_before [2018-01-24 16:03:19,719 INFO L136 BoogieDeclarations]: Found implementation of procedure inspect_after [2018-01-24 16:03:19,719 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-24 16:03:19,719 INFO L128 BoogieDeclarations]: Found specification of procedure write~int [2018-01-24 16:03:19,719 INFO L128 BoogieDeclarations]: Found specification of procedure read~int [2018-01-24 16:03:19,720 INFO L128 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2018-01-24 16:03:19,720 INFO L128 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2018-01-24 16:03:19,720 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-01-24 16:03:19,720 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-01-24 16:03:19,720 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-01-24 16:03:19,720 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2018-01-24 16:03:19,720 INFO L128 BoogieDeclarations]: Found specification of procedure free [2018-01-24 16:03:19,720 INFO L128 BoogieDeclarations]: Found specification of procedure abort [2018-01-24 16:03:19,720 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-01-24 16:03:19,720 INFO L128 BoogieDeclarations]: Found specification of procedure fail [2018-01-24 16:03:19,721 INFO L128 BoogieDeclarations]: Found specification of procedure merge_single_node [2018-01-24 16:03:19,721 INFO L128 BoogieDeclarations]: Found specification of procedure merge_pair [2018-01-24 16:03:19,721 INFO L128 BoogieDeclarations]: Found specification of procedure seq_sort_core [2018-01-24 16:03:19,721 INFO L128 BoogieDeclarations]: Found specification of procedure inspect_before [2018-01-24 16:03:19,721 INFO L128 BoogieDeclarations]: Found specification of procedure inspect_after [2018-01-24 16:03:19,721 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-24 16:03:19,721 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-24 16:03:19,721 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-24 16:03:20,626 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-24 16:03:20,626 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.01 04:03:20 BoogieIcfgContainer [2018-01-24 16:03:20,627 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-24 16:03:20,627 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-01-24 16:03:20,628 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-01-24 16:03:20,630 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-01-24 16:03:20,630 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.01 04:03:19" (1/3) ... [2018-01-24 16:03:20,632 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2fe3ffdf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.01 04:03:20, skipping insertion in model container [2018-01-24 16:03:20,632 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 04:03:19" (2/3) ... [2018-01-24 16:03:20,632 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2fe3ffdf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.01 04:03:20, skipping insertion in model container [2018-01-24 16:03:20,633 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.01 04:03:20" (3/3) ... [2018-01-24 16:03:20,635 INFO L105 eAbstractionObserver]: Analyzing ICFG merge_sort_true-unreach-call_true-valid-memsafety.i [2018-01-24 16:03:20,642 INFO L130 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-01-24 16:03:20,648 INFO L142 ceAbstractionStarter]: Appying trace abstraction to program that has 109 error locations. [2018-01-24 16:03:20,706 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-24 16:03:20,707 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-24 16:03:20,707 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-24 16:03:20,707 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-24 16:03:20,707 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-24 16:03:20,707 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-24 16:03:20,707 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-24 16:03:20,707 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-01-24 16:03:20,708 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-24 16:03:20,736 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states. [2018-01-24 16:03:20,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-01-24 16:03:20,743 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 16:03:20,744 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 16:03:20,744 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]=== [2018-01-24 16:03:20,750 INFO L82 PathProgramCache]: Analyzing trace with hash 1556477250, now seen corresponding path program 1 times [2018-01-24 16:03:20,753 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 16:03:20,814 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 16:03:20,814 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 16:03:20,815 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 16:03:20,815 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 16:03:20,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 16:03:20,868 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 16:03:20,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 16:03:20,901 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 16:03:20,902 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-24 16:03:20,902 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 16:03:20,991 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-24 16:03:21,002 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-24 16:03:21,003 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-24 16:03:21,004 INFO L87 Difference]: Start difference. First operand 315 states. Second operand 2 states. [2018-01-24 16:03:21,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 16:03:21,064 INFO L93 Difference]: Finished difference Result 622 states and 773 transitions. [2018-01-24 16:03:21,064 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-24 16:03:21,066 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 9 [2018-01-24 16:03:21,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 16:03:21,080 INFO L225 Difference]: With dead ends: 622 [2018-01-24 16:03:21,080 INFO L226 Difference]: Without dead ends: 296 [2018-01-24 16:03:21,086 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 [2018-01-24 16:03:21,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2018-01-24 16:03:21,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 296. [2018-01-24 16:03:21,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 296 states. [2018-01-24 16:03:21,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 309 transitions. [2018-01-24 16:03:21,146 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 309 transitions. Word has length 9 [2018-01-24 16:03:21,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 16:03:21,146 INFO L432 AbstractCegarLoop]: Abstraction has 296 states and 309 transitions. [2018-01-24 16:03:21,146 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-24 16:03:21,147 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 309 transitions. [2018-01-24 16:03:21,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-01-24 16:03:21,147 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 16:03:21,147 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 16:03:21,148 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]=== [2018-01-24 16:03:21,148 INFO L82 PathProgramCache]: Analyzing trace with hash 1087749341, now seen corresponding path program 1 times [2018-01-24 16:03:21,148 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 16:03:21,149 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 16:03:21,149 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 16:03:21,149 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 16:03:21,150 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 16:03:21,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 16:03:21,162 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 16:03:21,200 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 16:03:21,201 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 16:03:21,201 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-24 16:03:21,201 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 16:03:21,203 INFO L409 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-01-24 16:03:21,203 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-01-24 16:03:21,203 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-01-24 16:03:21,204 INFO L87 Difference]: Start difference. First operand 296 states and 309 transitions. Second operand 3 states. [2018-01-24 16:03:21,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 16:03:21,557 INFO L93 Difference]: Finished difference Result 340 states and 362 transitions. [2018-01-24 16:03:21,557 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-01-24 16:03:21,557 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2018-01-24 16:03:21,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 16:03:21,560 INFO L225 Difference]: With dead ends: 340 [2018-01-24 16:03:21,560 INFO L226 Difference]: Without dead ends: 338 [2018-01-24 16:03:21,561 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-01-24 16:03:21,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2018-01-24 16:03:21,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 300. [2018-01-24 16:03:21,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 300 states. [2018-01-24 16:03:21,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 314 transitions. [2018-01-24 16:03:21,588 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 314 transitions. Word has length 11 [2018-01-24 16:03:21,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 16:03:21,588 INFO L432 AbstractCegarLoop]: Abstraction has 300 states and 314 transitions. [2018-01-24 16:03:21,588 INFO L433 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-01-24 16:03:21,589 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 314 transitions. [2018-01-24 16:03:21,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-01-24 16:03:21,589 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 16:03:21,589 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 16:03:21,590 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]=== [2018-01-24 16:03:21,590 INFO L82 PathProgramCache]: Analyzing trace with hash 1650764336, now seen corresponding path program 1 times [2018-01-24 16:03:21,590 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 16:03:21,591 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 16:03:21,591 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 16:03:21,591 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 16:03:21,591 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 16:03:21,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 16:03:21,611 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 16:03:21,711 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 16:03:21,712 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 16:03:21,756 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-24 16:03:21,756 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 16:03:21,756 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-24 16:03:21,756 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-24 16:03:21,757 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-24 16:03:21,757 INFO L87 Difference]: Start difference. First operand 300 states and 314 transitions. Second operand 4 states. [2018-01-24 16:03:22,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 16:03:22,005 INFO L93 Difference]: Finished difference Result 330 states and 348 transitions. [2018-01-24 16:03:22,005 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-01-24 16:03:22,005 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2018-01-24 16:03:22,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 16:03:22,008 INFO L225 Difference]: With dead ends: 330 [2018-01-24 16:03:22,008 INFO L226 Difference]: Without dead ends: 328 [2018-01-24 16:03:22,009 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-01-24 16:03:22,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2018-01-24 16:03:22,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 298. [2018-01-24 16:03:22,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 298 states. [2018-01-24 16:03:22,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 312 transitions. [2018-01-24 16:03:22,028 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 312 transitions. Word has length 13 [2018-01-24 16:03:22,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 16:03:22,029 INFO L432 AbstractCegarLoop]: Abstraction has 298 states and 312 transitions. [2018-01-24 16:03:22,029 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-24 16:03:22,029 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 312 transitions. [2018-01-24 16:03:22,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-01-24 16:03:22,030 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 16:03:22,030 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 16:03:22,030 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]=== [2018-01-24 16:03:22,030 INFO L82 PathProgramCache]: Analyzing trace with hash 1650764335, now seen corresponding path program 1 times [2018-01-24 16:03:22,030 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 16:03:22,031 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 16:03:22,031 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 16:03:22,031 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 16:03:22,032 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 16:03:22,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 16:03:22,040 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 16:03:22,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 16:03:22,066 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 16:03:22,066 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-24 16:03:22,066 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 16:03:22,066 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-24 16:03:22,067 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-24 16:03:22,067 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-24 16:03:22,067 INFO L87 Difference]: Start difference. First operand 298 states and 312 transitions. Second operand 4 states. [2018-01-24 16:03:22,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 16:03:22,306 INFO L93 Difference]: Finished difference Result 317 states and 334 transitions. [2018-01-24 16:03:22,306 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-01-24 16:03:22,306 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2018-01-24 16:03:22,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 16:03:22,308 INFO L225 Difference]: With dead ends: 317 [2018-01-24 16:03:22,308 INFO L226 Difference]: Without dead ends: 315 [2018-01-24 16:03:22,308 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 [2018-01-24 16:03:22,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2018-01-24 16:03:22,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 296. [2018-01-24 16:03:22,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 296 states. [2018-01-24 16:03:22,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 310 transitions. [2018-01-24 16:03:22,323 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 310 transitions. Word has length 13 [2018-01-24 16:03:22,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 16:03:22,323 INFO L432 AbstractCegarLoop]: Abstraction has 296 states and 310 transitions. [2018-01-24 16:03:22,323 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-24 16:03:22,323 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 310 transitions. [2018-01-24 16:03:22,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-01-24 16:03:22,324 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 16:03:22,324 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 16:03:22,324 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]=== [2018-01-24 16:03:22,324 INFO L82 PathProgramCache]: Analyzing trace with hash 45229303, now seen corresponding path program 1 times [2018-01-24 16:03:22,324 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 16:03:22,325 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 16:03:22,325 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 16:03:22,325 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 16:03:22,326 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 16:03:22,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 16:03:22,334 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 16:03:22,356 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 16:03:22,356 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 16:03:22,356 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-24 16:03:22,356 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 16:03:22,356 INFO L409 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-01-24 16:03:22,357 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-01-24 16:03:22,357 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-01-24 16:03:22,357 INFO L87 Difference]: Start difference. First operand 296 states and 310 transitions. Second operand 3 states. [2018-01-24 16:03:22,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 16:03:22,386 INFO L93 Difference]: Finished difference Result 580 states and 604 transitions. [2018-01-24 16:03:22,386 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-01-24 16:03:22,386 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2018-01-24 16:03:22,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 16:03:22,388 INFO L225 Difference]: With dead ends: 580 [2018-01-24 16:03:22,388 INFO L226 Difference]: Without dead ends: 314 [2018-01-24 16:03:22,389 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-01-24 16:03:22,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2018-01-24 16:03:22,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 295. [2018-01-24 16:03:22,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 295 states. [2018-01-24 16:03:22,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 308 transitions. [2018-01-24 16:03:22,401 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 308 transitions. Word has length 17 [2018-01-24 16:03:22,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 16:03:22,402 INFO L432 AbstractCegarLoop]: Abstraction has 295 states and 308 transitions. [2018-01-24 16:03:22,402 INFO L433 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-01-24 16:03:22,402 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 308 transitions. [2018-01-24 16:03:22,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-01-24 16:03:22,403 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 16:03:22,403 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] [2018-01-24 16:03:22,403 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]=== [2018-01-24 16:03:22,403 INFO L82 PathProgramCache]: Analyzing trace with hash 963226955, now seen corresponding path program 1 times [2018-01-24 16:03:22,403 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 16:03:22,404 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 16:03:22,404 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 16:03:22,404 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 16:03:22,404 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 16:03:22,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 16:03:22,419 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 16:03:22,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 16:03:22,496 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 16:03:22,496 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-24 16:03:22,496 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 16:03:22,496 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-24 16:03:22,496 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-24 16:03:22,496 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-24 16:03:22,497 INFO L87 Difference]: Start difference. First operand 295 states and 308 transitions. Second operand 4 states. [2018-01-24 16:03:22,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 16:03:22,685 INFO L93 Difference]: Finished difference Result 331 states and 347 transitions. [2018-01-24 16:03:22,685 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-01-24 16:03:22,685 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2018-01-24 16:03:22,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 16:03:22,687 INFO L225 Difference]: With dead ends: 331 [2018-01-24 16:03:22,688 INFO L226 Difference]: Without dead ends: 329 [2018-01-24 16:03:22,688 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-01-24 16:03:22,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2018-01-24 16:03:22,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 293. [2018-01-24 16:03:22,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 293 states. [2018-01-24 16:03:22,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 306 transitions. [2018-01-24 16:03:22,701 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 306 transitions. Word has length 20 [2018-01-24 16:03:22,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 16:03:22,701 INFO L432 AbstractCegarLoop]: Abstraction has 293 states and 306 transitions. [2018-01-24 16:03:22,701 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-24 16:03:22,701 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 306 transitions. [2018-01-24 16:03:22,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-01-24 16:03:22,702 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 16:03:22,702 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] [2018-01-24 16:03:22,702 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]=== [2018-01-24 16:03:22,702 INFO L82 PathProgramCache]: Analyzing trace with hash 963226954, now seen corresponding path program 1 times [2018-01-24 16:03:22,702 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 16:03:22,703 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 16:03:22,703 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 16:03:22,703 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 16:03:22,703 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 16:03:22,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 16:03:22,717 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 16:03:22,744 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 16:03:22,745 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 16:03:22,745 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-24 16:03:22,745 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 16:03:22,745 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-24 16:03:22,745 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-24 16:03:22,746 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-24 16:03:22,746 INFO L87 Difference]: Start difference. First operand 293 states and 306 transitions. Second operand 4 states. [2018-01-24 16:03:23,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 16:03:23,084 INFO L93 Difference]: Finished difference Result 318 states and 333 transitions. [2018-01-24 16:03:23,084 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-01-24 16:03:23,084 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2018-01-24 16:03:23,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 16:03:23,085 INFO L225 Difference]: With dead ends: 318 [2018-01-24 16:03:23,086 INFO L226 Difference]: Without dead ends: 316 [2018-01-24 16:03:23,086 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 [2018-01-24 16:03:23,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2018-01-24 16:03:23,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 291. [2018-01-24 16:03:23,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 291 states. [2018-01-24 16:03:23,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 304 transitions. [2018-01-24 16:03:23,095 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 304 transitions. Word has length 20 [2018-01-24 16:03:23,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 16:03:23,095 INFO L432 AbstractCegarLoop]: Abstraction has 291 states and 304 transitions. [2018-01-24 16:03:23,095 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-24 16:03:23,095 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 304 transitions. [2018-01-24 16:03:23,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-01-24 16:03:23,096 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 16:03:23,096 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] [2018-01-24 16:03:23,096 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]=== [2018-01-24 16:03:23,096 INFO L82 PathProgramCache]: Analyzing trace with hash 1725402921, now seen corresponding path program 1 times [2018-01-24 16:03:23,096 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 16:03:23,097 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 16:03:23,097 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 16:03:23,097 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 16:03:23,097 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 16:03:23,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 16:03:23,113 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 16:03:23,172 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 16:03:23,172 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 16:03:23,172 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-24 16:03:23,172 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 16:03:23,173 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-24 16:03:23,173 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-24 16:03:23,173 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-01-24 16:03:23,173 INFO L87 Difference]: Start difference. First operand 291 states and 304 transitions. Second operand 5 states. [2018-01-24 16:03:23,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 16:03:23,306 INFO L93 Difference]: Finished difference Result 333 states and 349 transitions. [2018-01-24 16:03:23,306 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-24 16:03:23,306 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 27 [2018-01-24 16:03:23,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 16:03:23,308 INFO L225 Difference]: With dead ends: 333 [2018-01-24 16:03:23,308 INFO L226 Difference]: Without dead ends: 331 [2018-01-24 16:03:23,308 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 [2018-01-24 16:03:23,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2018-01-24 16:03:23,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 291. [2018-01-24 16:03:23,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 291 states. [2018-01-24 16:03:23,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 303 transitions. [2018-01-24 16:03:23,318 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 303 transitions. Word has length 27 [2018-01-24 16:03:23,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 16:03:23,318 INFO L432 AbstractCegarLoop]: Abstraction has 291 states and 303 transitions. [2018-01-24 16:03:23,318 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-24 16:03:23,318 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 303 transitions. [2018-01-24 16:03:23,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-01-24 16:03:23,319 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 16:03:23,319 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] [2018-01-24 16:03:23,319 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]=== [2018-01-24 16:03:23,319 INFO L82 PathProgramCache]: Analyzing trace with hash 1961365059, now seen corresponding path program 1 times [2018-01-24 16:03:23,320 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 16:03:23,321 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 16:03:23,321 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 16:03:23,321 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 16:03:23,321 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 16:03:23,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 16:03:23,337 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 16:03:23,405 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 16:03:23,405 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 16:03:23,405 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-24 16:03:23,405 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 16:03:23,405 INFO L409 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-01-24 16:03:23,406 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-01-24 16:03:23,406 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-01-24 16:03:23,406 INFO L87 Difference]: Start difference. First operand 291 states and 303 transitions. Second operand 6 states. [2018-01-24 16:03:24,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 16:03:24,348 INFO L93 Difference]: Finished difference Result 320 states and 337 transitions. [2018-01-24 16:03:24,348 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-01-24 16:03:24,349 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 33 [2018-01-24 16:03:24,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 16:03:24,351 INFO L225 Difference]: With dead ends: 320 [2018-01-24 16:03:24,351 INFO L226 Difference]: Without dead ends: 309 [2018-01-24 16:03:24,351 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 [2018-01-24 16:03:24,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2018-01-24 16:03:24,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 286. [2018-01-24 16:03:24,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 286 states. [2018-01-24 16:03:24,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 300 transitions. [2018-01-24 16:03:24,366 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 300 transitions. Word has length 33 [2018-01-24 16:03:24,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 16:03:24,366 INFO L432 AbstractCegarLoop]: Abstraction has 286 states and 300 transitions. [2018-01-24 16:03:24,366 INFO L433 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-01-24 16:03:24,367 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 300 transitions. [2018-01-24 16:03:24,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-01-24 16:03:24,367 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 16:03:24,368 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] [2018-01-24 16:03:24,368 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]=== [2018-01-24 16:03:24,368 INFO L82 PathProgramCache]: Analyzing trace with hash 1961365060, now seen corresponding path program 1 times [2018-01-24 16:03:24,368 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 16:03:24,369 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 16:03:24,369 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 16:03:24,370 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 16:03:24,370 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 16:03:24,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 16:03:24,386 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 16:03:24,526 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 16:03:24,527 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 16:03:24,527 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-01-24 16:03:24,527 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 16:03:24,527 INFO L409 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-01-24 16:03:24,527 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-01-24 16:03:24,527 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-01-24 16:03:24,528 INFO L87 Difference]: Start difference. First operand 286 states and 300 transitions. Second operand 7 states. [2018-01-24 16:03:24,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 16:03:24,980 INFO L93 Difference]: Finished difference Result 370 states and 386 transitions. [2018-01-24 16:03:24,980 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-01-24 16:03:24,980 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 33 [2018-01-24 16:03:24,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 16:03:24,982 INFO L225 Difference]: With dead ends: 370 [2018-01-24 16:03:24,982 INFO L226 Difference]: Without dead ends: 359 [2018-01-24 16:03:24,983 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2018-01-24 16:03:24,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2018-01-24 16:03:24,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 322. [2018-01-24 16:03:24,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 322 states. [2018-01-24 16:03:24,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 339 transitions. [2018-01-24 16:03:24,998 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 339 transitions. Word has length 33 [2018-01-24 16:03:24,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 16:03:24,998 INFO L432 AbstractCegarLoop]: Abstraction has 322 states and 339 transitions. [2018-01-24 16:03:24,998 INFO L433 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-01-24 16:03:24,999 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 339 transitions. [2018-01-24 16:03:25,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-01-24 16:03:25,000 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 16:03:25,000 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] [2018-01-24 16:03:25,001 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]=== [2018-01-24 16:03:25,001 INFO L82 PathProgramCache]: Analyzing trace with hash 816569686, now seen corresponding path program 1 times [2018-01-24 16:03:25,001 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 16:03:25,002 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 16:03:25,002 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 16:03:25,002 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 16:03:25,002 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 16:03:25,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 16:03:25,026 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 16:03:25,267 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 16:03:25,267 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 16:03:25,268 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2018-01-24 16:03:25,268 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 16:03:25,268 INFO L409 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-01-24 16:03:25,268 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-01-24 16:03:25,268 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2018-01-24 16:03:25,269 INFO L87 Difference]: Start difference. First operand 322 states and 339 transitions. Second operand 12 states. [2018-01-24 16:03:26,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 16:03:26,130 INFO L93 Difference]: Finished difference Result 337 states and 353 transitions. [2018-01-24 16:03:26,131 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-01-24 16:03:26,131 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 48 [2018-01-24 16:03:26,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 16:03:26,133 INFO L225 Difference]: With dead ends: 337 [2018-01-24 16:03:26,133 INFO L226 Difference]: Without dead ends: 336 [2018-01-24 16:03:26,134 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2018-01-24 16:03:26,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2018-01-24 16:03:26,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 323. [2018-01-24 16:03:26,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 323 states. [2018-01-24 16:03:26,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 341 transitions. [2018-01-24 16:03:26,143 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 341 transitions. Word has length 48 [2018-01-24 16:03:26,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 16:03:26,143 INFO L432 AbstractCegarLoop]: Abstraction has 323 states and 341 transitions. [2018-01-24 16:03:26,143 INFO L433 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-01-24 16:03:26,143 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 341 transitions. [2018-01-24 16:03:26,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-01-24 16:03:26,144 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 16:03:26,144 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] [2018-01-24 16:03:26,144 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]=== [2018-01-24 16:03:26,145 INFO L82 PathProgramCache]: Analyzing trace with hash 816569687, now seen corresponding path program 1 times [2018-01-24 16:03:26,145 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 16:03:26,146 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 16:03:26,146 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 16:03:26,146 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 16:03:26,146 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 16:03:26,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 16:03:26,162 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 16:03:26,424 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 16:03:26,424 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 16:03:26,424 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2018-01-24 16:03:26,424 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 16:03:26,425 INFO L409 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-01-24 16:03:26,425 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-01-24 16:03:26,425 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2018-01-24 16:03:26,425 INFO L87 Difference]: Start difference. First operand 323 states and 341 transitions. Second operand 10 states. [2018-01-24 16:03:27,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 16:03:27,146 INFO L93 Difference]: Finished difference Result 349 states and 365 transitions. [2018-01-24 16:03:27,146 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-01-24 16:03:27,146 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 48 [2018-01-24 16:03:27,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 16:03:27,148 INFO L225 Difference]: With dead ends: 349 [2018-01-24 16:03:27,148 INFO L226 Difference]: Without dead ends: 348 [2018-01-24 16:03:27,149 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 [2018-01-24 16:03:27,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2018-01-24 16:03:27,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 323. [2018-01-24 16:03:27,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 323 states. [2018-01-24 16:03:27,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 340 transitions. [2018-01-24 16:03:27,164 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 340 transitions. Word has length 48 [2018-01-24 16:03:27,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 16:03:27,165 INFO L432 AbstractCegarLoop]: Abstraction has 323 states and 340 transitions. [2018-01-24 16:03:27,165 INFO L433 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-01-24 16:03:27,165 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 340 transitions. [2018-01-24 16:03:27,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-01-24 16:03:27,166 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 16:03:27,166 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] [2018-01-24 16:03:27,166 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]=== [2018-01-24 16:03:27,167 INFO L82 PathProgramCache]: Analyzing trace with hash 1119918648, now seen corresponding path program 1 times [2018-01-24 16:03:27,167 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 16:03:27,168 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 16:03:27,168 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 16:03:27,168 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 16:03:27,168 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 16:03:27,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 16:03:27,184 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 16:03:27,438 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 16:03:27,438 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 16:03:27,438 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2018-01-24 16:03:27,438 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 16:03:27,439 INFO L409 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-01-24 16:03:27,439 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-01-24 16:03:27,439 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2018-01-24 16:03:27,439 INFO L87 Difference]: Start difference. First operand 323 states and 340 transitions. Second operand 12 states. [2018-01-24 16:03:28,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 16:03:28,235 INFO L93 Difference]: Finished difference Result 335 states and 351 transitions. [2018-01-24 16:03:28,235 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-01-24 16:03:28,235 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 48 [2018-01-24 16:03:28,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 16:03:28,237 INFO L225 Difference]: With dead ends: 335 [2018-01-24 16:03:28,237 INFO L226 Difference]: Without dead ends: 334 [2018-01-24 16:03:28,238 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2018-01-24 16:03:28,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2018-01-24 16:03:28,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 323. [2018-01-24 16:03:28,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 323 states. [2018-01-24 16:03:28,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 339 transitions. [2018-01-24 16:03:28,253 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 339 transitions. Word has length 48 [2018-01-24 16:03:28,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 16:03:28,253 INFO L432 AbstractCegarLoop]: Abstraction has 323 states and 339 transitions. [2018-01-24 16:03:28,253 INFO L433 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-01-24 16:03:28,253 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 339 transitions. [2018-01-24 16:03:28,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-01-24 16:03:28,254 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 16:03:28,255 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] [2018-01-24 16:03:28,255 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]=== [2018-01-24 16:03:28,255 INFO L82 PathProgramCache]: Analyzing trace with hash 1119918649, now seen corresponding path program 1 times [2018-01-24 16:03:28,255 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 16:03:28,256 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 16:03:28,256 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 16:03:28,257 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 16:03:28,257 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 16:03:28,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 16:03:28,272 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 16:03:28,469 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 16:03:28,469 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 16:03:28,469 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2018-01-24 16:03:28,469 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 16:03:28,469 INFO L409 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-01-24 16:03:28,470 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-01-24 16:03:28,470 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2018-01-24 16:03:28,470 INFO L87 Difference]: Start difference. First operand 323 states and 339 transitions. Second operand 10 states. [2018-01-24 16:03:29,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 16:03:29,094 INFO L93 Difference]: Finished difference Result 347 states and 363 transitions. [2018-01-24 16:03:29,094 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-01-24 16:03:29,094 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 48 [2018-01-24 16:03:29,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 16:03:29,096 INFO L225 Difference]: With dead ends: 347 [2018-01-24 16:03:29,096 INFO L226 Difference]: Without dead ends: 346 [2018-01-24 16:03:29,097 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2018-01-24 16:03:29,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2018-01-24 16:03:29,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 323. [2018-01-24 16:03:29,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 323 states. [2018-01-24 16:03:29,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 338 transitions. [2018-01-24 16:03:29,107 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 338 transitions. Word has length 48 [2018-01-24 16:03:29,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 16:03:29,107 INFO L432 AbstractCegarLoop]: Abstraction has 323 states and 338 transitions. [2018-01-24 16:03:29,107 INFO L433 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-01-24 16:03:29,107 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 338 transitions. [2018-01-24 16:03:29,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-01-24 16:03:29,108 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 16:03:29,108 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] [2018-01-24 16:03:29,108 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]=== [2018-01-24 16:03:29,109 INFO L82 PathProgramCache]: Analyzing trace with hash 1300121728, now seen corresponding path program 1 times [2018-01-24 16:03:29,109 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 16:03:29,109 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 16:03:29,110 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 16:03:29,110 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 16:03:29,110 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 16:03:29,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 16:03:29,124 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 16:03:29,506 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 16:03:29,507 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-24 16:03:29,507 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-24 16:03:29,508 INFO L199 CegarAbsIntRunner]: Running AI on error trace of length 55 with the following transitions: [2018-01-24 16:03:29,509 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] [2018-01-24 16:03:29,558 INFO L147 AbstractInterpreter]: Using domain VPDomain [2018-01-24 16:03:29,558 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