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_precise.epf -i ../../../trunk/examples/svcomp/list-properties/alternating_list_true-unreach-call_true-valid-memsafety.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-6b94a2f [2018-01-25 00:16:27,934 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-25 00:16:27,936 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-25 00:16:27,949 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-25 00:16:27,950 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-25 00:16:27,951 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-25 00:16:27,952 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-25 00:16:27,954 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-25 00:16:27,956 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-25 00:16:27,956 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-25 00:16:27,957 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-01-25 00:16:27,957 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-01-25 00:16:27,958 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-01-25 00:16:27,959 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-01-25 00:16:27,959 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-01-25 00:16:27,962 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-01-25 00:16:27,964 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-01-25 00:16:27,966 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-01-25 00:16:27,967 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-01-25 00:16:27,968 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-01-25 00:16:27,971 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-01-25 00:16:27,971 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-01-25 00:16:27,971 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-01-25 00:16:27,972 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-01-25 00:16:27,973 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-01-25 00:16:27,974 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-01-25 00:16:27,974 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-01-25 00:16:27,975 INFO L177 SettingsManager]: PEA to Boogie provides no preferences, ignoring... [2018-01-25 00:16:27,975 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-01-25 00:16:27,975 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-01-25 00:16:27,976 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-01-25 00:16:27,976 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_precise.epf [2018-01-25 00:16:27,986 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-25 00:16:27,987 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-25 00:16:27,988 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-25 00:16:27,988 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-25 00:16:27,988 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-25 00:16:27,988 INFO L133 SettingsManager]: * Weq Fattening=true [2018-01-25 00:16:27,988 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-25 00:16:27,989 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-25 00:16:27,989 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-25 00:16:27,990 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-25 00:16:27,990 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-25 00:16:27,990 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-25 00:16:27,990 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-25 00:16:27,990 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-25 00:16:27,991 INFO L133 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2018-01-25 00:16:27,991 INFO L133 SettingsManager]: * Bitprecise bitfields=true [2018-01-25 00:16:27,991 INFO L133 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2018-01-25 00:16:27,991 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-25 00:16:27,991 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-25 00:16:27,992 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-25 00:16:27,992 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-01-25 00:16:27,992 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-25 00:16:27,992 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-25 00:16:27,992 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-25 00:16:27,993 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-25 00:16:27,993 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-25 00:16:27,993 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-25 00:16:27,993 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-25 00:16:27,993 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-25 00:16:27,994 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-01-25 00:16:27,994 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-25 00:16:27,994 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-25 00:16:27,994 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-25 00:16:27,994 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-01-25 00:16:27,995 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-25 00:16:27,995 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-25 00:16:28,030 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-25 00:16:28,043 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-25 00:16:28,047 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-25 00:16:28,049 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-25 00:16:28,049 INFO L276 PluginConnector]: CDTParser initialized [2018-01-25 00:16:28,050 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-properties/alternating_list_true-unreach-call_true-valid-memsafety.i [2018-01-25 00:16:28,210 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-25 00:16:28,216 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-25 00:16:28,217 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-25 00:16:28,218 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-25 00:16:28,224 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-25 00:16:28,224 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.01 12:16:28" (1/1) ... [2018-01-25 00:16:28,227 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@365d5287 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.01 12:16:28, skipping insertion in model container [2018-01-25 00:16:28,227 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.01 12:16:28" (1/1) ... [2018-01-25 00:16:28,247 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-25 00:16:28,287 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-25 00:16:28,407 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-25 00:16:28,425 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-25 00:16:28,433 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.01 12:16:28 WrapperNode [2018-01-25 00:16:28,433 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-25 00:16:28,434 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-25 00:16:28,434 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-25 00:16:28,434 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-25 00:16:28,449 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.01 12:16:28" (1/1) ... [2018-01-25 00:16:28,449 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.01 12:16:28" (1/1) ... [2018-01-25 00:16:28,460 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.01 12:16:28" (1/1) ... [2018-01-25 00:16:28,460 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.01 12:16:28" (1/1) ... [2018-01-25 00:16:28,464 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.01 12:16:28" (1/1) ... [2018-01-25 00:16:28,467 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.01 12:16:28" (1/1) ... [2018-01-25 00:16:28,468 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.01 12:16:28" (1/1) ... [2018-01-25 00:16:28,469 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-25 00:16:28,470 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-25 00:16:28,470 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-25 00:16:28,470 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-25 00:16:28,471 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.01 12:16:28" (1/1) ... No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-25 00:16:28,514 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-25 00:16:28,515 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-25 00:16:28,515 INFO L136 BoogieDeclarations]: Found implementation of procedure exit [2018-01-25 00:16:28,515 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-25 00:16:28,515 INFO L128 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2018-01-25 00:16:28,515 INFO L128 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2018-01-25 00:16:28,515 INFO L128 BoogieDeclarations]: Found specification of procedure write~int [2018-01-25 00:16:28,516 INFO L128 BoogieDeclarations]: Found specification of procedure read~int [2018-01-25 00:16:28,516 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-01-25 00:16:28,516 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-01-25 00:16:28,516 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-01-25 00:16:28,516 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2018-01-25 00:16:28,516 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-01-25 00:16:28,516 INFO L128 BoogieDeclarations]: Found specification of procedure malloc [2018-01-25 00:16:28,517 INFO L128 BoogieDeclarations]: Found specification of procedure free [2018-01-25 00:16:28,517 INFO L128 BoogieDeclarations]: Found specification of procedure exit [2018-01-25 00:16:28,517 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-25 00:16:28,517 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-25 00:16:28,517 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-25 00:16:28,833 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-25 00:16:28,834 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.01 12:16:28 BoogieIcfgContainer [2018-01-25 00:16:28,834 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-25 00:16:28,837 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-01-25 00:16:28,837 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-01-25 00:16:28,839 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-01-25 00:16:28,839 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.01 12:16:28" (1/3) ... [2018-01-25 00:16:28,841 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c8f4a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.01 12:16:28, skipping insertion in model container [2018-01-25 00:16:28,841 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.01 12:16:28" (2/3) ... [2018-01-25 00:16:28,841 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c8f4a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.01 12:16:28, skipping insertion in model container [2018-01-25 00:16:28,841 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.01 12:16:28" (3/3) ... [2018-01-25 00:16:28,843 INFO L105 eAbstractionObserver]: Analyzing ICFG alternating_list_true-unreach-call_true-valid-memsafety.i [2018-01-25 00:16:28,852 INFO L130 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-01-25 00:16:28,860 INFO L142 ceAbstractionStarter]: Appying trace abstraction to program that has 27 error locations. [2018-01-25 00:16:28,910 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-25 00:16:28,910 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-25 00:16:28,910 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-25 00:16:28,910 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-25 00:16:28,910 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-25 00:16:28,910 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-25 00:16:28,911 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-25 00:16:28,911 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-01-25 00:16:28,912 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-25 00:16:28,929 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states. [2018-01-25 00:16:28,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-01-25 00:16:28,936 INFO L314 BasicCegarLoop]: Found error trace [2018-01-25 00:16:28,937 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-25 00:16:28,937 INFO L371 AbstractCegarLoop]: === Iteration 1 === [mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr0RequiresViolation, mainErr21RequiresViolation, mainErr3RequiresViolation, mainErr15RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr1RequiresViolation, mainErr17RequiresViolation, mainErr9RequiresViolation, mainErr26EnsuresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr11RequiresViolation, mainErr24RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr4RequiresViolation, mainErr14RequiresViolation]=== [2018-01-25 00:16:28,941 INFO L82 PathProgramCache]: Analyzing trace with hash 1444354772, now seen corresponding path program 1 times [2018-01-25 00:16:28,943 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-25 00:16:28,982 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 00:16:28,983 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-25 00:16:28,983 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 00:16:28,983 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-25 00:16:29,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-25 00:16:29,031 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-25 00:16:29,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-25 00:16:29,068 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-25 00:16:29,069 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-25 00:16:29,069 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-25 00:16:29,072 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-25 00:16:29,082 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-25 00:16:29,082 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-25 00:16:29,084 INFO L87 Difference]: Start difference. First operand 81 states. Second operand 2 states. [2018-01-25 00:16:29,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-25 00:16:29,187 INFO L93 Difference]: Finished difference Result 126 states and 142 transitions. [2018-01-25 00:16:29,187 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-25 00:16:29,188 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 12 [2018-01-25 00:16:29,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-25 00:16:29,197 INFO L225 Difference]: With dead ends: 126 [2018-01-25 00:16:29,197 INFO L226 Difference]: Without dead ends: 73 [2018-01-25 00:16:29,201 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-25 00:16:29,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-01-25 00:16:29,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2018-01-25 00:16:29,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-01-25 00:16:29,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 77 transitions. [2018-01-25 00:16:29,233 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 77 transitions. Word has length 12 [2018-01-25 00:16:29,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-25 00:16:29,234 INFO L432 AbstractCegarLoop]: Abstraction has 73 states and 77 transitions. [2018-01-25 00:16:29,234 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-25 00:16:29,234 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 77 transitions. [2018-01-25 00:16:29,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-01-25 00:16:29,234 INFO L314 BasicCegarLoop]: Found error trace [2018-01-25 00:16:29,235 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-25 00:16:29,235 INFO L371 AbstractCegarLoop]: === Iteration 2 === [mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr0RequiresViolation, mainErr21RequiresViolation, mainErr3RequiresViolation, mainErr15RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr1RequiresViolation, mainErr17RequiresViolation, mainErr9RequiresViolation, mainErr26EnsuresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr11RequiresViolation, mainErr24RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr4RequiresViolation, mainErr14RequiresViolation]=== [2018-01-25 00:16:29,235 INFO L82 PathProgramCache]: Analyzing trace with hash 749299640, now seen corresponding path program 1 times [2018-01-25 00:16:29,235 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-25 00:16:29,236 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 00:16:29,237 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-25 00:16:29,237 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 00:16:29,237 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-25 00:16:29,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-25 00:16:29,253 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-25 00:16:29,336 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-25 00:16:29,337 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-25 00:16:29,337 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-01-25 00:16:29,337 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-25 00:16:29,339 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-25 00:16:29,339 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-25 00:16:29,339 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-01-25 00:16:29,339 INFO L87 Difference]: Start difference. First operand 73 states and 77 transitions. Second operand 5 states. [2018-01-25 00:16:29,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-25 00:16:29,568 INFO L93 Difference]: Finished difference Result 103 states and 112 transitions. [2018-01-25 00:16:29,568 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-01-25 00:16:29,569 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2018-01-25 00:16:29,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-25 00:16:29,570 INFO L225 Difference]: With dead ends: 103 [2018-01-25 00:16:29,570 INFO L226 Difference]: Without dead ends: 91 [2018-01-25 00:16:29,571 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-01-25 00:16:29,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-01-25 00:16:29,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 77. [2018-01-25 00:16:29,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-01-25 00:16:29,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 88 transitions. [2018-01-25 00:16:29,578 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 88 transitions. Word has length 14 [2018-01-25 00:16:29,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-25 00:16:29,578 INFO L432 AbstractCegarLoop]: Abstraction has 77 states and 88 transitions. [2018-01-25 00:16:29,579 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-25 00:16:29,579 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 88 transitions. [2018-01-25 00:16:29,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-01-25 00:16:29,579 INFO L314 BasicCegarLoop]: Found error trace [2018-01-25 00:16:29,579 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-25 00:16:29,579 INFO L371 AbstractCegarLoop]: === Iteration 3 === [mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr0RequiresViolation, mainErr21RequiresViolation, mainErr3RequiresViolation, mainErr15RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr1RequiresViolation, mainErr17RequiresViolation, mainErr9RequiresViolation, mainErr26EnsuresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr11RequiresViolation, mainErr24RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr4RequiresViolation, mainErr14RequiresViolation]=== [2018-01-25 00:16:29,580 INFO L82 PathProgramCache]: Analyzing trace with hash 749299641, now seen corresponding path program 1 times [2018-01-25 00:16:29,580 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-25 00:16:29,581 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 00:16:29,581 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-25 00:16:29,581 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 00:16:29,581 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-25 00:16:29,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-25 00:16:29,599 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-25 00:16:29,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-25 00:16:29,685 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-25 00:16:29,685 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-01-25 00:16:29,686 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-25 00:16:29,686 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-25 00:16:29,686 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-25 00:16:29,686 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-01-25 00:16:29,686 INFO L87 Difference]: Start difference. First operand 77 states and 88 transitions. Second operand 5 states. [2018-01-25 00:16:29,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-25 00:16:29,874 INFO L93 Difference]: Finished difference Result 114 states and 122 transitions. [2018-01-25 00:16:29,874 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-25 00:16:29,875 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2018-01-25 00:16:29,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-25 00:16:29,876 INFO L225 Difference]: With dead ends: 114 [2018-01-25 00:16:29,876 INFO L226 Difference]: Without dead ends: 102 [2018-01-25 00:16:29,877 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-01-25 00:16:29,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2018-01-25 00:16:29,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 94. [2018-01-25 00:16:29,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2018-01-25 00:16:29,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 103 transitions. [2018-01-25 00:16:29,888 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 103 transitions. Word has length 14 [2018-01-25 00:16:29,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-25 00:16:29,888 INFO L432 AbstractCegarLoop]: Abstraction has 94 states and 103 transitions. [2018-01-25 00:16:29,888 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-25 00:16:29,889 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 103 transitions. [2018-01-25 00:16:29,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-01-25 00:16:29,890 INFO L314 BasicCegarLoop]: Found error trace [2018-01-25 00:16:29,890 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-25 00:16:29,890 INFO L371 AbstractCegarLoop]: === Iteration 4 === [mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr0RequiresViolation, mainErr21RequiresViolation, mainErr3RequiresViolation, mainErr15RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr1RequiresViolation, mainErr17RequiresViolation, mainErr9RequiresViolation, mainErr26EnsuresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr11RequiresViolation, mainErr24RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr4RequiresViolation, mainErr14RequiresViolation]=== [2018-01-25 00:16:29,890 INFO L82 PathProgramCache]: Analyzing trace with hash 129960215, now seen corresponding path program 1 times [2018-01-25 00:16:29,890 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-25 00:16:29,891 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 00:16:29,891 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-25 00:16:29,891 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 00:16:29,891 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-25 00:16:29,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-25 00:16:29,912 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-25 00:16:30,007 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-25 00:16:30,007 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-25 00:16:30,008 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-25 00:16:30,008 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-25 00:16:30,008 INFO L409 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-01-25 00:16:30,008 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-01-25 00:16:30,009 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-01-25 00:16:30,009 INFO L87 Difference]: Start difference. First operand 94 states and 103 transitions. Second operand 6 states. [2018-01-25 00:16:30,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-25 00:16:30,205 INFO L93 Difference]: Finished difference Result 134 states and 147 transitions. [2018-01-25 00:16:30,205 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-01-25 00:16:30,205 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2018-01-25 00:16:30,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-25 00:16:30,206 INFO L225 Difference]: With dead ends: 134 [2018-01-25 00:16:30,206 INFO L226 Difference]: Without dead ends: 130 [2018-01-25 00:16:30,206 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-01-25 00:16:30,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2018-01-25 00:16:30,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 118. [2018-01-25 00:16:30,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2018-01-25 00:16:30,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 136 transitions. [2018-01-25 00:16:30,216 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 136 transitions. Word has length 25 [2018-01-25 00:16:30,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-25 00:16:30,217 INFO L432 AbstractCegarLoop]: Abstraction has 118 states and 136 transitions. [2018-01-25 00:16:30,217 INFO L433 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-01-25 00:16:30,217 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 136 transitions. [2018-01-25 00:16:30,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-01-25 00:16:30,217 INFO L314 BasicCegarLoop]: Found error trace [2018-01-25 00:16:30,218 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-25 00:16:30,218 INFO L371 AbstractCegarLoop]: === Iteration 5 === [mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr0RequiresViolation, mainErr21RequiresViolation, mainErr3RequiresViolation, mainErr15RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr1RequiresViolation, mainErr17RequiresViolation, mainErr9RequiresViolation, mainErr26EnsuresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr11RequiresViolation, mainErr24RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr4RequiresViolation, mainErr14RequiresViolation]=== [2018-01-25 00:16:30,218 INFO L82 PathProgramCache]: Analyzing trace with hash 130009866, now seen corresponding path program 1 times [2018-01-25 00:16:30,218 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-25 00:16:30,219 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 00:16:30,219 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-25 00:16:30,219 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 00:16:30,219 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-25 00:16:30,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-25 00:16:30,230 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-25 00:16:30,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-25 00:16:30,270 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-25 00:16:30,271 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-25 00:16:30,271 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-25 00:16:30,271 INFO L409 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-01-25 00:16:30,271 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-01-25 00:16:30,271 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-01-25 00:16:30,271 INFO L87 Difference]: Start difference. First operand 118 states and 136 transitions. Second operand 6 states. [2018-01-25 00:16:30,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-25 00:16:30,386 INFO L93 Difference]: Finished difference Result 130 states and 147 transitions. [2018-01-25 00:16:30,386 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-01-25 00:16:30,387 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2018-01-25 00:16:30,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-25 00:16:30,388 INFO L225 Difference]: With dead ends: 130 [2018-01-25 00:16:30,388 INFO L226 Difference]: Without dead ends: 129 [2018-01-25 00:16:30,389 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2018-01-25 00:16:30,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2018-01-25 00:16:30,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 120. [2018-01-25 00:16:30,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2018-01-25 00:16:30,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 139 transitions. [2018-01-25 00:16:30,401 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 139 transitions. Word has length 25 [2018-01-25 00:16:30,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-25 00:16:30,402 INFO L432 AbstractCegarLoop]: Abstraction has 120 states and 139 transitions. [2018-01-25 00:16:30,402 INFO L433 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-01-25 00:16:30,402 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 139 transitions. [2018-01-25 00:16:30,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-01-25 00:16:30,403 INFO L314 BasicCegarLoop]: Found error trace [2018-01-25 00:16:30,403 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, 1, 1, 1, 1, 1] [2018-01-25 00:16:30,403 INFO L371 AbstractCegarLoop]: === Iteration 6 === [mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr0RequiresViolation, mainErr21RequiresViolation, mainErr3RequiresViolation, mainErr15RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr1RequiresViolation, mainErr17RequiresViolation, mainErr9RequiresViolation, mainErr26EnsuresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr11RequiresViolation, mainErr24RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr4RequiresViolation, mainErr14RequiresViolation]=== [2018-01-25 00:16:30,403 INFO L82 PathProgramCache]: Analyzing trace with hash 130009867, now seen corresponding path program 1 times [2018-01-25 00:16:30,403 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-25 00:16:30,404 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 00:16:30,404 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-25 00:16:30,405 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 00:16:30,405 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-25 00:16:30,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-25 00:16:30,417 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-25 00:16:30,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-25 00:16:30,468 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-25 00:16:30,492 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-25 00:16:30,492 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-25 00:16:30,492 INFO L409 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-01-25 00:16:30,493 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-01-25 00:16:30,493 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-01-25 00:16:30,493 INFO L87 Difference]: Start difference. First operand 120 states and 139 transitions. Second operand 6 states. [2018-01-25 00:16:30,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-25 00:16:30,667 INFO L93 Difference]: Finished difference Result 128 states and 146 transitions. [2018-01-25 00:16:30,667 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-01-25 00:16:30,667 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2018-01-25 00:16:30,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-25 00:16:30,668 INFO L225 Difference]: With dead ends: 128 [2018-01-25 00:16:30,668 INFO L226 Difference]: Without dead ends: 127 [2018-01-25 00:16:30,668 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2018-01-25 00:16:30,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2018-01-25 00:16:30,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 119. [2018-01-25 00:16:30,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2018-01-25 00:16:30,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 137 transitions. [2018-01-25 00:16:30,676 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 137 transitions. Word has length 25 [2018-01-25 00:16:30,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-25 00:16:30,677 INFO L432 AbstractCegarLoop]: Abstraction has 119 states and 137 transitions. [2018-01-25 00:16:30,677 INFO L433 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-01-25 00:16:30,677 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 137 transitions. [2018-01-25 00:16:30,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-01-25 00:16:30,678 INFO L314 BasicCegarLoop]: Found error trace [2018-01-25 00:16:30,678 INFO L322 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-25 00:16:30,678 INFO L371 AbstractCegarLoop]: === Iteration 7 === [mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr0RequiresViolation, mainErr21RequiresViolation, mainErr3RequiresViolation, mainErr15RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr1RequiresViolation, mainErr17RequiresViolation, mainErr9RequiresViolation, mainErr26EnsuresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr11RequiresViolation, mainErr24RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr4RequiresViolation, mainErr14RequiresViolation]=== [2018-01-25 00:16:30,679 INFO L82 PathProgramCache]: Analyzing trace with hash 825919103, now seen corresponding path program 1 times [2018-01-25 00:16:30,679 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-25 00:16:30,680 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 00:16:30,680 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-25 00:16:30,680 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 00:16:30,680 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-25 00:16:30,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-25 00:16:30,689 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-25 00:16:30,711 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-25 00:16:30,711 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-25 00:16:30,712 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-25 00:16:30,712 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-25 00:16:30,712 INFO L409 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-01-25 00:16:30,713 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-01-25 00:16:30,713 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-01-25 00:16:30,713 INFO L87 Difference]: Start difference. First operand 119 states and 137 transitions. Second operand 3 states. [2018-01-25 00:16:30,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-25 00:16:30,742 INFO L93 Difference]: Finished difference Result 270 states and 312 transitions. [2018-01-25 00:16:30,742 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-01-25 00:16:30,742 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2018-01-25 00:16:30,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-25 00:16:30,744 INFO L225 Difference]: With dead ends: 270 [2018-01-25 00:16:30,744 INFO L226 Difference]: Without dead ends: 175 [2018-01-25 00:16:30,744 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-01-25 00:16:30,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2018-01-25 00:16:30,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 135. [2018-01-25 00:16:30,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2018-01-25 00:16:30,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 161 transitions. [2018-01-25 00:16:30,757 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 161 transitions. Word has length 25 [2018-01-25 00:16:30,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-25 00:16:30,757 INFO L432 AbstractCegarLoop]: Abstraction has 135 states and 161 transitions. [2018-01-25 00:16:30,757 INFO L433 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-01-25 00:16:30,757 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 161 transitions. [2018-01-25 00:16:30,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-01-25 00:16:30,758 INFO L314 BasicCegarLoop]: Found error trace [2018-01-25 00:16:30,758 INFO L322 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-25 00:16:30,759 INFO L371 AbstractCegarLoop]: === Iteration 8 === [mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr0RequiresViolation, mainErr21RequiresViolation, mainErr3RequiresViolation, mainErr15RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr1RequiresViolation, mainErr17RequiresViolation, mainErr9RequiresViolation, mainErr26EnsuresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr11RequiresViolation, mainErr24RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr4RequiresViolation, mainErr14RequiresViolation]=== [2018-01-25 00:16:30,759 INFO L82 PathProgramCache]: Analyzing trace with hash 245290165, now seen corresponding path program 1 times [2018-01-25 00:16:30,759 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-25 00:16:30,760 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 00:16:30,760 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-25 00:16:30,760 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 00:16:30,760 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-25 00:16:30,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-25 00:16:30,770 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-25 00:16:30,864 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-25 00:16:30,864 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-25 00:16:30,865 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-01-25 00:16:30,865 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-25 00:16:30,865 INFO L409 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-01-25 00:16:30,865 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-01-25 00:16:30,866 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-01-25 00:16:30,866 INFO L87 Difference]: Start difference. First operand 135 states and 161 transitions. Second operand 6 states. [2018-01-25 00:16:31,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-25 00:16:31,065 INFO L93 Difference]: Finished difference Result 186 states and 206 transitions. [2018-01-25 00:16:31,065 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-01-25 00:16:31,065 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2018-01-25 00:16:31,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-25 00:16:31,066 INFO L225 Difference]: With dead ends: 186 [2018-01-25 00:16:31,066 INFO L226 Difference]: Without dead ends: 139 [2018-01-25 00:16:31,067 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2018-01-25 00:16:31,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2018-01-25 00:16:31,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 115. [2018-01-25 00:16:31,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2018-01-25 00:16:31,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 129 transitions. [2018-01-25 00:16:31,076 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 129 transitions. Word has length 25 [2018-01-25 00:16:31,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-25 00:16:31,077 INFO L432 AbstractCegarLoop]: Abstraction has 115 states and 129 transitions. [2018-01-25 00:16:31,077 INFO L433 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-01-25 00:16:31,077 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 129 transitions. [2018-01-25 00:16:31,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-01-25 00:16:31,078 INFO L314 BasicCegarLoop]: Found error trace [2018-01-25 00:16:31,078 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] [2018-01-25 00:16:31,078 INFO L371 AbstractCegarLoop]: === Iteration 9 === [mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr0RequiresViolation, mainErr21RequiresViolation, mainErr3RequiresViolation, mainErr15RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr1RequiresViolation, mainErr17RequiresViolation, mainErr9RequiresViolation, mainErr26EnsuresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr11RequiresViolation, mainErr24RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr4RequiresViolation, mainErr14RequiresViolation]=== [2018-01-25 00:16:31,078 INFO L82 PathProgramCache]: Analyzing trace with hash 1978391014, now seen corresponding path program 1 times [2018-01-25 00:16:31,078 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-25 00:16:31,079 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 00:16:31,079 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-25 00:16:31,080 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 00:16:31,080 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-25 00:16:31,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-25 00:16:31,089 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-25 00:16:31,146 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-25 00:16:31,146 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-25 00:16:31,146 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-01-25 00:16:31,146 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-25 00:16:31,147 INFO L409 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-01-25 00:16:31,147 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-01-25 00:16:31,147 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-01-25 00:16:31,147 INFO L87 Difference]: Start difference. First operand 115 states and 129 transitions. Second operand 7 states. [2018-01-25 00:16:31,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-25 00:16:31,300 INFO L93 Difference]: Finished difference Result 118 states and 132 transitions. [2018-01-25 00:16:31,301 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-01-25 00:16:31,301 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 26 [2018-01-25 00:16:31,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-25 00:16:31,302 INFO L225 Difference]: With dead ends: 118 [2018-01-25 00:16:31,302 INFO L226 Difference]: Without dead ends: 115 [2018-01-25 00:16:31,302 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2018-01-25 00:16:31,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2018-01-25 00:16:31,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 112. [2018-01-25 00:16:31,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2018-01-25 00:16:31,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 126 transitions. [2018-01-25 00:16:31,309 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 126 transitions. Word has length 26 [2018-01-25 00:16:31,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-25 00:16:31,309 INFO L432 AbstractCegarLoop]: Abstraction has 112 states and 126 transitions. [2018-01-25 00:16:31,309 INFO L433 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-01-25 00:16:31,309 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 126 transitions. [2018-01-25 00:16:31,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-01-25 00:16:31,310 INFO L314 BasicCegarLoop]: Found error trace [2018-01-25 00:16:31,310 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] [2018-01-25 00:16:31,310 INFO L371 AbstractCegarLoop]: === Iteration 10 === [mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr0RequiresViolation, mainErr21RequiresViolation, mainErr3RequiresViolation, mainErr15RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr1RequiresViolation, mainErr17RequiresViolation, mainErr9RequiresViolation, mainErr26EnsuresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr11RequiresViolation, mainErr24RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr4RequiresViolation, mainErr14RequiresViolation]=== [2018-01-25 00:16:31,310 INFO L82 PathProgramCache]: Analyzing trace with hash 1978391015, now seen corresponding path program 1 times [2018-01-25 00:16:31,310 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-25 00:16:31,311 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 00:16:31,312 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-25 00:16:31,312 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 00:16:31,312 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-25 00:16:31,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-25 00:16:31,325 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-25 00:16:31,440 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-25 00:16:31,440 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-25 00:16:31,440 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-01-25 00:16:31,440 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-25 00:16:31,441 INFO L409 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-01-25 00:16:31,441 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-01-25 00:16:31,441 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-01-25 00:16:31,441 INFO L87 Difference]: Start difference. First operand 112 states and 126 transitions. Second operand 7 states. [2018-01-25 00:16:31,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-25 00:16:31,660 INFO L93 Difference]: Finished difference Result 131 states and 145 transitions. [2018-01-25 00:16:31,660 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-01-25 00:16:31,660 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 26 [2018-01-25 00:16:31,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-25 00:16:31,662 INFO L225 Difference]: With dead ends: 131 [2018-01-25 00:16:31,662 INFO L226 Difference]: Without dead ends: 126 [2018-01-25 00:16:31,662 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2018-01-25 00:16:31,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2018-01-25 00:16:31,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 99. [2018-01-25 00:16:31,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2018-01-25 00:16:31,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 111 transitions. [2018-01-25 00:16:31,671 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 111 transitions. Word has length 26 [2018-01-25 00:16:31,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-25 00:16:31,672 INFO L432 AbstractCegarLoop]: Abstraction has 99 states and 111 transitions. [2018-01-25 00:16:31,672 INFO L433 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-01-25 00:16:31,672 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 111 transitions. [2018-01-25 00:16:31,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-01-25 00:16:31,673 INFO L314 BasicCegarLoop]: Found error trace [2018-01-25 00:16:31,673 INFO L322 BasicCegarLoop]: trace histogram [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] [2018-01-25 00:16:31,673 INFO L371 AbstractCegarLoop]: === Iteration 11 === [mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr0RequiresViolation, mainErr21RequiresViolation, mainErr3RequiresViolation, mainErr15RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr1RequiresViolation, mainErr17RequiresViolation, mainErr9RequiresViolation, mainErr26EnsuresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr11RequiresViolation, mainErr24RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr4RequiresViolation, mainErr14RequiresViolation]=== [2018-01-25 00:16:31,674 INFO L82 PathProgramCache]: Analyzing trace with hash 385432044, now seen corresponding path program 1 times [2018-01-25 00:16:31,674 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-25 00:16:31,674 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 00:16:31,675 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-25 00:16:31,675 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 00:16:31,675 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-25 00:16:31,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-25 00:16:31,684 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-25 00:16:31,723 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-25 00:16:31,723 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-25 00:16:31,723 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2018-01-25 00:16:31,723 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-25 00:16:31,724 INFO L409 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-01-25 00:16:31,724 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-01-25 00:16:31,724 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-01-25 00:16:31,724 INFO L87 Difference]: Start difference. First operand 99 states and 111 transitions. Second operand 7 states. [2018-01-25 00:16:31,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-25 00:16:31,894 INFO L93 Difference]: Finished difference Result 138 states and 149 transitions. [2018-01-25 00:16:31,894 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-01-25 00:16:31,894 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27 [2018-01-25 00:16:31,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-25 00:16:31,895 INFO L225 Difference]: With dead ends: 138 [2018-01-25 00:16:31,895 INFO L226 Difference]: Without dead ends: 111 [2018-01-25 00:16:31,896 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2018-01-25 00:16:31,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2018-01-25 00:16:31,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 94. [2018-01-25 00:16:31,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2018-01-25 00:16:31,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 105 transitions. [2018-01-25 00:16:31,902 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 105 transitions. Word has length 27 [2018-01-25 00:16:31,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-25 00:16:31,902 INFO L432 AbstractCegarLoop]: Abstraction has 94 states and 105 transitions. [2018-01-25 00:16:31,902 INFO L433 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-01-25 00:16:31,902 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 105 transitions. [2018-01-25 00:16:31,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-01-25 00:16:31,903 INFO L314 BasicCegarLoop]: Found error trace [2018-01-25 00:16:31,903 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] [2018-01-25 00:16:31,903 INFO L371 AbstractCegarLoop]: === Iteration 12 === [mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr0RequiresViolation, mainErr21RequiresViolation, mainErr3RequiresViolation, mainErr15RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr1RequiresViolation, mainErr17RequiresViolation, mainErr9RequiresViolation, mainErr26EnsuresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr11RequiresViolation, mainErr24RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr4RequiresViolation, mainErr14RequiresViolation]=== [2018-01-25 00:16:31,903 INFO L82 PathProgramCache]: Analyzing trace with hash 1053625897, now seen corresponding path program 1 times [2018-01-25 00:16:31,903 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-25 00:16:31,904 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 00:16:31,904 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-25 00:16:31,905 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 00:16:31,905 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-25 00:16:31,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-25 00:16:31,922 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-25 00:16:32,234 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-25 00:16:32,234 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-25 00:16:32,234 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-25 00:16:32,235 INFO L199 CegarAbsIntRunner]: Running AI on error trace of length 38 with the following transitions: [2018-01-25 00:16:32,237 INFO L201 CegarAbsIntRunner]: [0], [1], [2], [8], [10], [14], [16], [19], [21], [24], [25], [28], [36], [37], [43], [45], [48], [51], [55], [58], [62], [64], [69], [101], [105], [107], [112], [125], [128], [131], [136], [137], [145], [146], [147] [2018-01-25 00:16:32,287 INFO L147 AbstractInterpreter]: Using domain VPDomain [2018-01-25 00:16:32,287 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