java -Xmx6000000000 -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data ./data --generate-csv --csv-dir ../../../releaseScripts/default/UAutomizer-linux/csv -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/ai/eq-bench/svcomp-DerefFreeMemtrack-32bit-Automizer_Taipan+AI_EQ_preciseopt.epf -i ../../../trunk/examples/svcomp/list-properties/alternating_list_true-unreach-call_true-valid-memsafety.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-6b94a2f [2018-01-25 03:42:25,472 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-25 03:42:25,474 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-25 03:42:25,489 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-25 03:42:25,489 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-25 03:42:25,490 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-25 03:42:25,492 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-25 03:42:25,493 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-25 03:42:25,495 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-25 03:42:25,496 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-25 03:42:25,497 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-01-25 03:42:25,497 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-01-25 03:42:25,498 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-01-25 03:42:25,499 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-01-25 03:42:25,500 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-01-25 03:42:25,503 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-01-25 03:42:25,505 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-01-25 03:42:25,507 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-01-25 03:42:25,508 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-01-25 03:42:25,510 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-01-25 03:42:25,512 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-01-25 03:42:25,512 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-01-25 03:42:25,513 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-01-25 03:42:25,514 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-01-25 03:42:25,515 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-01-25 03:42:25,516 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-01-25 03:42:25,516 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-01-25 03:42:25,517 INFO L177 SettingsManager]: PEA to Boogie provides no preferences, ignoring... [2018-01-25 03:42:25,517 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-01-25 03:42:25,517 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-01-25 03:42:25,518 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-01-25 03:42:25,518 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/eq-bench/svcomp-DerefFreeMemtrack-32bit-Automizer_Taipan+AI_EQ_preciseopt.epf [2018-01-25 03:42:25,527 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-25 03:42:25,528 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-25 03:42:25,528 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-25 03:42:25,528 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-25 03:42:25,529 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-25 03:42:25,529 INFO L133 SettingsManager]: * Weq Fattening=true [2018-01-25 03:42:25,529 INFO L133 SettingsManager]: * Flatten before fatten=true [2018-01-25 03:42:25,529 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-25 03:42:25,529 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-25 03:42:25,529 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-25 03:42:25,530 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-25 03:42:25,530 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-25 03:42:25,530 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-25 03:42:25,530 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-25 03:42:25,530 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-25 03:42:25,530 INFO L133 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2018-01-25 03:42:25,531 INFO L133 SettingsManager]: * Bitprecise bitfields=true [2018-01-25 03:42:25,531 INFO L133 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2018-01-25 03:42:25,531 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-25 03:42:25,531 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-25 03:42:25,531 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-25 03:42:25,531 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-01-25 03:42:25,532 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-25 03:42:25,532 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-25 03:42:25,532 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-25 03:42:25,532 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-25 03:42:25,532 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-25 03:42:25,532 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-25 03:42:25,533 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-25 03:42:25,533 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-25 03:42:25,533 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-01-25 03:42:25,533 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-25 03:42:25,533 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-25 03:42:25,533 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-25 03:42:25,533 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-01-25 03:42:25,534 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-25 03:42:25,534 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-25 03:42:25,567 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-25 03:42:25,577 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-25 03:42:25,581 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-25 03:42:25,583 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-25 03:42:25,583 INFO L276 PluginConnector]: CDTParser initialized [2018-01-25 03:42:25,583 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-properties/alternating_list_true-unreach-call_true-valid-memsafety.i [2018-01-25 03:42:25,949 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-25 03:42:25,954 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-25 03:42:25,955 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-25 03:42:25,956 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-25 03:42:25,961 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-25 03:42:25,962 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.01 03:42:25" (1/1) ... [2018-01-25 03:42:25,964 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e41757a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.01 03:42:25, skipping insertion in model container [2018-01-25 03:42:25,965 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.01 03:42:25" (1/1) ... [2018-01-25 03:42:25,978 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-25 03:42:26,015 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-25 03:42:26,131 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-25 03:42:26,148 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-25 03:42:26,156 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.01 03:42:26 WrapperNode [2018-01-25 03:42:26,156 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-25 03:42:26,157 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-25 03:42:26,157 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-25 03:42:26,157 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-25 03:42:26,175 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.01 03:42:26" (1/1) ... [2018-01-25 03:42:26,175 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.01 03:42:26" (1/1) ... [2018-01-25 03:42:26,185 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.01 03:42:26" (1/1) ... [2018-01-25 03:42:26,186 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.01 03:42:26" (1/1) ... [2018-01-25 03:42:26,189 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.01 03:42:26" (1/1) ... [2018-01-25 03:42:26,192 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.01 03:42:26" (1/1) ... [2018-01-25 03:42:26,193 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.01 03:42:26" (1/1) ... [2018-01-25 03:42:26,195 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-25 03:42:26,196 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-25 03:42:26,196 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-25 03:42:26,196 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-25 03:42:26,197 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.01 03:42:26" (1/1) ... No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-25 03:42:26,263 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-25 03:42:26,264 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-25 03:42:26,264 INFO L136 BoogieDeclarations]: Found implementation of procedure exit [2018-01-25 03:42:26,264 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-25 03:42:26,264 INFO L128 BoogieDeclarations]: Found specification of procedure write~int [2018-01-25 03:42:26,264 INFO L128 BoogieDeclarations]: Found specification of procedure read~int [2018-01-25 03:42:26,264 INFO L128 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2018-01-25 03:42:26,264 INFO L128 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2018-01-25 03:42:26,265 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-01-25 03:42:26,265 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-01-25 03:42:26,265 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-01-25 03:42:26,265 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2018-01-25 03:42:26,265 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-01-25 03:42:26,265 INFO L128 BoogieDeclarations]: Found specification of procedure malloc [2018-01-25 03:42:26,265 INFO L128 BoogieDeclarations]: Found specification of procedure free [2018-01-25 03:42:26,265 INFO L128 BoogieDeclarations]: Found specification of procedure exit [2018-01-25 03:42:26,265 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-25 03:42:26,265 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-25 03:42:26,266 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-25 03:42:26,575 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-25 03:42:26,575 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.01 03:42:26 BoogieIcfgContainer [2018-01-25 03:42:26,576 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-25 03:42:26,577 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-01-25 03:42:26,577 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-01-25 03:42:26,578 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-01-25 03:42:26,579 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.01 03:42:25" (1/3) ... [2018-01-25 03:42:26,580 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@fc7592 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.01 03:42:26, skipping insertion in model container [2018-01-25 03:42:26,580 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.01 03:42:26" (2/3) ... [2018-01-25 03:42:26,580 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@fc7592 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.01 03:42:26, skipping insertion in model container [2018-01-25 03:42:26,580 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.01 03:42:26" (3/3) ... [2018-01-25 03:42:26,582 INFO L105 eAbstractionObserver]: Analyzing ICFG alternating_list_true-unreach-call_true-valid-memsafety.i [2018-01-25 03:42:26,592 INFO L130 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-01-25 03:42:26,601 INFO L142 ceAbstractionStarter]: Appying trace abstraction to program that has 27 error locations. [2018-01-25 03:42:26,642 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-25 03:42:26,642 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-25 03:42:26,642 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-25 03:42:26,642 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-25 03:42:26,642 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-25 03:42:26,643 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-25 03:42:26,643 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-25 03:42:26,643 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-01-25 03:42:26,644 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-25 03:42:26,666 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states. [2018-01-25 03:42:26,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-01-25 03:42:26,673 INFO L314 BasicCegarLoop]: Found error trace [2018-01-25 03:42:26,674 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-25 03:42:26,674 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 03:42:26,678 INFO L82 PathProgramCache]: Analyzing trace with hash 1444354772, now seen corresponding path program 1 times [2018-01-25 03:42:26,680 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-25 03:42:26,721 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 03:42:26,722 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-25 03:42:26,722 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 03:42:26,722 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-25 03:42:26,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-25 03:42:26,770 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-25 03:42:26,805 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-25 03:42:26,808 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-25 03:42:26,808 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-25 03:42:26,808 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-25 03:42:26,811 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-25 03:42:26,823 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-25 03:42:26,823 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-25 03:42:26,825 INFO L87 Difference]: Start difference. First operand 81 states. Second operand 2 states. [2018-01-25 03:42:26,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-25 03:42:26,947 INFO L93 Difference]: Finished difference Result 126 states and 142 transitions. [2018-01-25 03:42:26,947 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-25 03:42:26,948 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 12 [2018-01-25 03:42:26,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-25 03:42:26,957 INFO L225 Difference]: With dead ends: 126 [2018-01-25 03:42:26,957 INFO L226 Difference]: Without dead ends: 73 [2018-01-25 03:42:26,962 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-25 03:42:26,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-01-25 03:42:26,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2018-01-25 03:42:26,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-01-25 03:42:26,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 77 transitions. [2018-01-25 03:42:26,994 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 77 transitions. Word has length 12 [2018-01-25 03:42:26,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-25 03:42:26,994 INFO L432 AbstractCegarLoop]: Abstraction has 73 states and 77 transitions. [2018-01-25 03:42:26,995 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-25 03:42:26,995 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 77 transitions. [2018-01-25 03:42:26,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-01-25 03:42:26,995 INFO L314 BasicCegarLoop]: Found error trace [2018-01-25 03:42:26,995 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-25 03:42:26,995 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 03:42:26,996 INFO L82 PathProgramCache]: Analyzing trace with hash 749299640, now seen corresponding path program 1 times [2018-01-25 03:42:26,996 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-25 03:42:26,997 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 03:42:26,997 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-25 03:42:26,997 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 03:42:26,998 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-25 03:42:27,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-25 03:42:27,014 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-25 03:42:27,098 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-25 03:42:27,099 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-25 03:42:27,099 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-01-25 03:42:27,099 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-25 03:42:27,100 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-25 03:42:27,101 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-25 03:42:27,101 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-01-25 03:42:27,101 INFO L87 Difference]: Start difference. First operand 73 states and 77 transitions. Second operand 5 states. [2018-01-25 03:42:27,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-25 03:42:27,341 INFO L93 Difference]: Finished difference Result 103 states and 112 transitions. [2018-01-25 03:42:27,342 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-01-25 03:42:27,342 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2018-01-25 03:42:27,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-25 03:42:27,343 INFO L225 Difference]: With dead ends: 103 [2018-01-25 03:42:27,343 INFO L226 Difference]: Without dead ends: 91 [2018-01-25 03:42:27,344 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 03:42:27,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-01-25 03:42:27,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 77. [2018-01-25 03:42:27,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-01-25 03:42:27,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 88 transitions. [2018-01-25 03:42:27,351 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 88 transitions. Word has length 14 [2018-01-25 03:42:27,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-25 03:42:27,352 INFO L432 AbstractCegarLoop]: Abstraction has 77 states and 88 transitions. [2018-01-25 03:42:27,352 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-25 03:42:27,352 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 88 transitions. [2018-01-25 03:42:27,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-01-25 03:42:27,352 INFO L314 BasicCegarLoop]: Found error trace [2018-01-25 03:42:27,352 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-25 03:42:27,352 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 03:42:27,353 INFO L82 PathProgramCache]: Analyzing trace with hash 749299641, now seen corresponding path program 1 times [2018-01-25 03:42:27,353 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-25 03:42:27,354 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 03:42:27,354 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-25 03:42:27,354 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 03:42:27,355 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-25 03:42:27,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-25 03:42:27,372 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-25 03:42:27,476 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-25 03:42:27,476 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-25 03:42:27,476 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-01-25 03:42:27,476 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-25 03:42:27,476 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-25 03:42:27,477 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-25 03:42:27,477 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-01-25 03:42:27,477 INFO L87 Difference]: Start difference. First operand 77 states and 88 transitions. Second operand 5 states. [2018-01-25 03:42:27,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-25 03:42:27,676 INFO L93 Difference]: Finished difference Result 114 states and 122 transitions. [2018-01-25 03:42:27,676 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-25 03:42:27,676 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2018-01-25 03:42:27,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-25 03:42:27,678 INFO L225 Difference]: With dead ends: 114 [2018-01-25 03:42:27,678 INFO L226 Difference]: Without dead ends: 102 [2018-01-25 03:42:27,679 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-01-25 03:42:27,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2018-01-25 03:42:27,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 94. [2018-01-25 03:42:27,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2018-01-25 03:42:27,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 103 transitions. [2018-01-25 03:42:27,689 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 103 transitions. Word has length 14 [2018-01-25 03:42:27,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-25 03:42:27,690 INFO L432 AbstractCegarLoop]: Abstraction has 94 states and 103 transitions. [2018-01-25 03:42:27,690 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-25 03:42:27,690 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 103 transitions. [2018-01-25 03:42:27,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-01-25 03:42:27,691 INFO L314 BasicCegarLoop]: Found error trace [2018-01-25 03:42:27,691 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 03:42:27,691 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 03:42:27,692 INFO L82 PathProgramCache]: Analyzing trace with hash 129960215, now seen corresponding path program 1 times [2018-01-25 03:42:27,692 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-25 03:42:27,693 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 03:42:27,693 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-25 03:42:27,693 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 03:42:27,693 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-25 03:42:27,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-25 03:42:27,724 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-25 03:42:27,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-25 03:42:27,850 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-25 03:42:27,851 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-25 03:42:27,851 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-25 03:42:27,851 INFO L409 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-01-25 03:42:27,851 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-01-25 03:42:27,852 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-01-25 03:42:27,852 INFO L87 Difference]: Start difference. First operand 94 states and 103 transitions. Second operand 6 states. [2018-01-25 03:42:28,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-25 03:42:28,077 INFO L93 Difference]: Finished difference Result 134 states and 147 transitions. [2018-01-25 03:42:28,077 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-01-25 03:42:28,077 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2018-01-25 03:42:28,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-25 03:42:28,079 INFO L225 Difference]: With dead ends: 134 [2018-01-25 03:42:28,079 INFO L226 Difference]: Without dead ends: 130 [2018-01-25 03:42:28,080 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 03:42:28,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2018-01-25 03:42:28,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 118. [2018-01-25 03:42:28,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2018-01-25 03:42:28,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 136 transitions. [2018-01-25 03:42:28,093 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 136 transitions. Word has length 25 [2018-01-25 03:42:28,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-25 03:42:28,093 INFO L432 AbstractCegarLoop]: Abstraction has 118 states and 136 transitions. [2018-01-25 03:42:28,093 INFO L433 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-01-25 03:42:28,093 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 136 transitions. [2018-01-25 03:42:28,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-01-25 03:42:28,094 INFO L314 BasicCegarLoop]: Found error trace [2018-01-25 03:42:28,094 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 03:42:28,094 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 03:42:28,095 INFO L82 PathProgramCache]: Analyzing trace with hash 130009866, now seen corresponding path program 1 times [2018-01-25 03:42:28,095 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-25 03:42:28,095 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 03:42:28,095 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-25 03:42:28,096 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 03:42:28,096 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-25 03:42:28,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-25 03:42:28,108 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-25 03:42:28,155 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-25 03:42:28,155 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-25 03:42:28,155 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-25 03:42:28,157 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-25 03:42:28,158 INFO L409 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-01-25 03:42:28,158 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-01-25 03:42:28,158 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-01-25 03:42:28,159 INFO L87 Difference]: Start difference. First operand 118 states and 136 transitions. Second operand 6 states. [2018-01-25 03:42:28,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-25 03:42:28,307 INFO L93 Difference]: Finished difference Result 130 states and 147 transitions. [2018-01-25 03:42:28,307 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-01-25 03:42:28,307 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2018-01-25 03:42:28,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-25 03:42:28,309 INFO L225 Difference]: With dead ends: 130 [2018-01-25 03:42:28,309 INFO L226 Difference]: Without dead ends: 129 [2018-01-25 03:42:28,310 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 03:42:28,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2018-01-25 03:42:28,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 120. [2018-01-25 03:42:28,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2018-01-25 03:42:28,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 139 transitions. [2018-01-25 03:42:28,322 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 139 transitions. Word has length 25 [2018-01-25 03:42:28,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-25 03:42:28,323 INFO L432 AbstractCegarLoop]: Abstraction has 120 states and 139 transitions. [2018-01-25 03:42:28,323 INFO L433 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-01-25 03:42:28,323 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 139 transitions. [2018-01-25 03:42:28,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-01-25 03:42:28,324 INFO L314 BasicCegarLoop]: Found error trace [2018-01-25 03:42:28,324 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 03:42:28,324 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 03:42:28,324 INFO L82 PathProgramCache]: Analyzing trace with hash 130009867, now seen corresponding path program 1 times [2018-01-25 03:42:28,325 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-25 03:42:28,325 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 03:42:28,326 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-25 03:42:28,326 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 03:42:28,326 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-25 03:42:28,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-25 03:42:28,339 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-25 03:42:28,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-25 03:42:28,380 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-25 03:42:28,380 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-25 03:42:28,380 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-25 03:42:28,380 INFO L409 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-01-25 03:42:28,380 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-01-25 03:42:28,380 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-01-25 03:42:28,381 INFO L87 Difference]: Start difference. First operand 120 states and 139 transitions. Second operand 6 states. [2018-01-25 03:42:28,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-25 03:42:28,565 INFO L93 Difference]: Finished difference Result 128 states and 146 transitions. [2018-01-25 03:42:28,565 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-01-25 03:42:28,566 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2018-01-25 03:42:28,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-25 03:42:28,567 INFO L225 Difference]: With dead ends: 128 [2018-01-25 03:42:28,567 INFO L226 Difference]: Without dead ends: 127 [2018-01-25 03:42:28,567 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 03:42:28,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2018-01-25 03:42:28,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 119. [2018-01-25 03:42:28,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2018-01-25 03:42:28,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 137 transitions. [2018-01-25 03:42:28,575 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 137 transitions. Word has length 25 [2018-01-25 03:42:28,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-25 03:42:28,576 INFO L432 AbstractCegarLoop]: Abstraction has 119 states and 137 transitions. [2018-01-25 03:42:28,576 INFO L433 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-01-25 03:42:28,576 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 137 transitions. [2018-01-25 03:42:28,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-01-25 03:42:28,577 INFO L314 BasicCegarLoop]: Found error trace [2018-01-25 03:42:28,577 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 03:42:28,577 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 03:42:28,577 INFO L82 PathProgramCache]: Analyzing trace with hash 825919103, now seen corresponding path program 1 times [2018-01-25 03:42:28,577 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-25 03:42:28,578 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 03:42:28,578 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-25 03:42:28,578 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 03:42:28,578 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-25 03:42:28,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-25 03:42:28,589 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-25 03:42:28,614 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 03:42:28,614 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-25 03:42:28,614 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-25 03:42:28,615 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-25 03:42:28,615 INFO L409 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-01-25 03:42:28,615 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-01-25 03:42:28,615 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-01-25 03:42:28,615 INFO L87 Difference]: Start difference. First operand 119 states and 137 transitions. Second operand 3 states. [2018-01-25 03:42:28,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-25 03:42:28,646 INFO L93 Difference]: Finished difference Result 270 states and 312 transitions. [2018-01-25 03:42:28,646 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-01-25 03:42:28,646 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2018-01-25 03:42:28,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-25 03:42:28,647 INFO L225 Difference]: With dead ends: 270 [2018-01-25 03:42:28,648 INFO L226 Difference]: Without dead ends: 175 [2018-01-25 03:42:28,649 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-01-25 03:42:28,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2018-01-25 03:42:28,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 135. [2018-01-25 03:42:28,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2018-01-25 03:42:28,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 161 transitions. [2018-01-25 03:42:28,660 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 161 transitions. Word has length 25 [2018-01-25 03:42:28,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-25 03:42:28,660 INFO L432 AbstractCegarLoop]: Abstraction has 135 states and 161 transitions. [2018-01-25 03:42:28,660 INFO L433 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-01-25 03:42:28,661 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 161 transitions. [2018-01-25 03:42:28,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-01-25 03:42:28,661 INFO L314 BasicCegarLoop]: Found error trace [2018-01-25 03:42:28,661 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 03:42:28,661 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 03:42:28,662 INFO L82 PathProgramCache]: Analyzing trace with hash 245290165, now seen corresponding path program 1 times [2018-01-25 03:42:28,662 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-25 03:42:28,662 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 03:42:28,663 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-25 03:42:28,663 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 03:42:28,663 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-25 03:42:28,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-25 03:42:28,674 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-25 03:42:28,720 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 03:42:28,720 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-25 03:42:28,720 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-01-25 03:42:28,720 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-25 03:42:28,721 INFO L409 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-01-25 03:42:28,721 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-01-25 03:42:28,721 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-01-25 03:42:28,721 INFO L87 Difference]: Start difference. First operand 135 states and 161 transitions. Second operand 6 states. [2018-01-25 03:42:28,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-25 03:42:28,869 INFO L93 Difference]: Finished difference Result 186 states and 206 transitions. [2018-01-25 03:42:28,870 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-01-25 03:42:28,870 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2018-01-25 03:42:28,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-25 03:42:28,871 INFO L225 Difference]: With dead ends: 186 [2018-01-25 03:42:28,871 INFO L226 Difference]: Without dead ends: 139 [2018-01-25 03:42:28,872 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2018-01-25 03:42:28,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2018-01-25 03:42:28,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 115. [2018-01-25 03:42:28,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2018-01-25 03:42:28,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 129 transitions. [2018-01-25 03:42:28,883 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 129 transitions. Word has length 25 [2018-01-25 03:42:28,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-25 03:42:28,883 INFO L432 AbstractCegarLoop]: Abstraction has 115 states and 129 transitions. [2018-01-25 03:42:28,883 INFO L433 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-01-25 03:42:28,883 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 129 transitions. [2018-01-25 03:42:28,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-01-25 03:42:28,884 INFO L314 BasicCegarLoop]: Found error trace [2018-01-25 03:42:28,884 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 03:42:28,884 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 03:42:28,884 INFO L82 PathProgramCache]: Analyzing trace with hash 1978391014, now seen corresponding path program 1 times [2018-01-25 03:42:28,884 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-25 03:42:28,885 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 03:42:28,885 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-25 03:42:28,885 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 03:42:28,885 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-25 03:42:28,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-25 03:42:28,894 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-25 03:42:28,939 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-25 03:42:28,940 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-25 03:42:28,940 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-01-25 03:42:28,940 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-25 03:42:28,940 INFO L409 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-01-25 03:42:28,941 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-01-25 03:42:28,941 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-01-25 03:42:28,941 INFO L87 Difference]: Start difference. First operand 115 states and 129 transitions. Second operand 7 states. [2018-01-25 03:42:29,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-25 03:42:29,139 INFO L93 Difference]: Finished difference Result 118 states and 132 transitions. [2018-01-25 03:42:29,139 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-01-25 03:42:29,139 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 26 [2018-01-25 03:42:29,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-25 03:42:29,140 INFO L225 Difference]: With dead ends: 118 [2018-01-25 03:42:29,140 INFO L226 Difference]: Without dead ends: 115 [2018-01-25 03:42:29,141 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 03:42:29,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2018-01-25 03:42:29,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 112. [2018-01-25 03:42:29,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2018-01-25 03:42:29,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 126 transitions. [2018-01-25 03:42:29,149 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 126 transitions. Word has length 26 [2018-01-25 03:42:29,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-25 03:42:29,150 INFO L432 AbstractCegarLoop]: Abstraction has 112 states and 126 transitions. [2018-01-25 03:42:29,150 INFO L433 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-01-25 03:42:29,150 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 126 transitions. [2018-01-25 03:42:29,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-01-25 03:42:29,151 INFO L314 BasicCegarLoop]: Found error trace [2018-01-25 03:42:29,151 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 03:42:29,151 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 03:42:29,151 INFO L82 PathProgramCache]: Analyzing trace with hash 1978391015, now seen corresponding path program 1 times [2018-01-25 03:42:29,152 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-25 03:42:29,153 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 03:42:29,153 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-25 03:42:29,153 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 03:42:29,153 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-25 03:42:29,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-25 03:42:29,165 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-25 03:42:29,293 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-25 03:42:29,293 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-25 03:42:29,293 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-01-25 03:42:29,293 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-25 03:42:29,294 INFO L409 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-01-25 03:42:29,294 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-01-25 03:42:29,294 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-01-25 03:42:29,294 INFO L87 Difference]: Start difference. First operand 112 states and 126 transitions. Second operand 7 states. [2018-01-25 03:42:29,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-25 03:42:29,516 INFO L93 Difference]: Finished difference Result 131 states and 145 transitions. [2018-01-25 03:42:29,516 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-01-25 03:42:29,516 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 26 [2018-01-25 03:42:29,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-25 03:42:29,517 INFO L225 Difference]: With dead ends: 131 [2018-01-25 03:42:29,517 INFO L226 Difference]: Without dead ends: 126 [2018-01-25 03:42:29,518 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 03:42:29,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2018-01-25 03:42:29,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 99. [2018-01-25 03:42:29,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2018-01-25 03:42:29,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 111 transitions. [2018-01-25 03:42:29,523 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 111 transitions. Word has length 26 [2018-01-25 03:42:29,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-25 03:42:29,524 INFO L432 AbstractCegarLoop]: Abstraction has 99 states and 111 transitions. [2018-01-25 03:42:29,524 INFO L433 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-01-25 03:42:29,524 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 111 transitions. [2018-01-25 03:42:29,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-01-25 03:42:29,525 INFO L314 BasicCegarLoop]: Found error trace [2018-01-25 03:42:29,525 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 03:42:29,525 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 03:42:29,525 INFO L82 PathProgramCache]: Analyzing trace with hash 385432044, now seen corresponding path program 1 times [2018-01-25 03:42:29,525 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-25 03:42:29,526 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 03:42:29,526 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-25 03:42:29,526 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 03:42:29,526 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-25 03:42:29,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-25 03:42:29,534 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-25 03:42:29,578 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 03:42:29,578 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-25 03:42:29,578 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2018-01-25 03:42:29,578 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-25 03:42:29,578 INFO L409 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-01-25 03:42:29,578 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-01-25 03:42:29,579 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-01-25 03:42:29,579 INFO L87 Difference]: Start difference. First operand 99 states and 111 transitions. Second operand 7 states. [2018-01-25 03:42:29,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-25 03:42:29,705 INFO L93 Difference]: Finished difference Result 138 states and 149 transitions. [2018-01-25 03:42:29,705 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-01-25 03:42:29,706 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27 [2018-01-25 03:42:29,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-25 03:42:29,706 INFO L225 Difference]: With dead ends: 138 [2018-01-25 03:42:29,706 INFO L226 Difference]: Without dead ends: 111 [2018-01-25 03:42:29,707 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 03:42:29,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2018-01-25 03:42:29,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 94. [2018-01-25 03:42:29,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2018-01-25 03:42:29,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 105 transitions. [2018-01-25 03:42:29,713 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 105 transitions. Word has length 27 [2018-01-25 03:42:29,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-25 03:42:29,713 INFO L432 AbstractCegarLoop]: Abstraction has 94 states and 105 transitions. [2018-01-25 03:42:29,713 INFO L433 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-01-25 03:42:29,713 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 105 transitions. [2018-01-25 03:42:29,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-01-25 03:42:29,714 INFO L314 BasicCegarLoop]: Found error trace [2018-01-25 03:42:29,714 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 03:42:29,714 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 03:42:29,714 INFO L82 PathProgramCache]: Analyzing trace with hash 1053625897, now seen corresponding path program 1 times [2018-01-25 03:42:29,714 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-25 03:42:29,715 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 03:42:29,715 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-25 03:42:29,715 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 03:42:29,715 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-25 03:42:29,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-25 03:42:29,730 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-25 03:42:29,971 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 03:42:29,971 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-25 03:42:29,971 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-25 03:42:29,972 INFO L199 CegarAbsIntRunner]: Running AI on error trace of length 38 with the following transitions: [2018-01-25 03:42:29,974 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 03:42:30,030 INFO L147 AbstractInterpreter]: Using domain VPDomain [2018-01-25 03:42:30,030 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