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-ext-properties/list-ext_false-unreach-call_false-valid-deref.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-6b94a2f [2018-01-24 23:50:50,464 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-24 23:50:50,467 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-24 23:50:50,480 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-24 23:50:50,481 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-24 23:50:50,482 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-24 23:50:50,483 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-24 23:50:50,485 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-24 23:50:50,487 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-24 23:50:50,488 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-24 23:50:50,488 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-01-24 23:50:50,489 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-01-24 23:50:50,490 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-01-24 23:50:50,491 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-01-24 23:50:50,491 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-01-24 23:50:50,494 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-01-24 23:50:50,496 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-01-24 23:50:50,498 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-01-24 23:50:50,499 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-01-24 23:50:50,500 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-01-24 23:50:50,502 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-01-24 23:50:50,503 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-01-24 23:50:50,503 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-01-24 23:50:50,504 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-01-24 23:50:50,505 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-01-24 23:50:50,506 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-01-24 23:50:50,506 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-01-24 23:50:50,507 INFO L177 SettingsManager]: PEA to Boogie provides no preferences, ignoring... [2018-01-24 23:50:50,507 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-01-24 23:50:50,507 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-01-24 23:50:50,508 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-01-24 23:50:50,508 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 [2018-01-24 23:50:50,518 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-24 23:50:50,518 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-24 23:50:50,519 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-24 23:50:50,519 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-24 23:50:50,520 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-24 23:50:50,520 INFO L133 SettingsManager]: * Weq Fattening=true [2018-01-24 23:50:50,520 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-24 23:50:50,520 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-24 23:50:50,521 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-24 23:50:50,521 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-24 23:50:50,521 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-24 23:50:50,522 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-24 23:50:50,522 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-24 23:50:50,522 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-24 23:50:50,522 INFO L133 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2018-01-24 23:50:50,522 INFO L133 SettingsManager]: * Bitprecise bitfields=true [2018-01-24 23:50:50,523 INFO L133 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2018-01-24 23:50:50,523 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-24 23:50:50,523 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-24 23:50:50,523 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-24 23:50:50,523 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-01-24 23:50:50,524 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-24 23:50:50,524 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-24 23:50:50,524 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-24 23:50:50,524 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-24 23:50:50,524 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-24 23:50:50,525 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-24 23:50:50,525 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-24 23:50:50,525 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-24 23:50:50,525 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-01-24 23:50:50,525 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-24 23:50:50,526 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-24 23:50:50,526 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-24 23:50:50,526 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-01-24 23:50:50,527 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-24 23:50:50,527 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-24 23:50:50,560 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-24 23:50:50,571 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-24 23:50:50,574 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-24 23:50:50,575 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-24 23:50:50,575 INFO L276 PluginConnector]: CDTParser initialized [2018-01-24 23:50:50,576 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-ext-properties/list-ext_false-unreach-call_false-valid-deref.i [2018-01-24 23:50:50,733 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-24 23:50:50,739 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-24 23:50:50,740 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-24 23:50:50,740 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-24 23:50:50,746 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-24 23:50:50,747 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.01 11:50:50" (1/1) ... [2018-01-24 23:50:50,749 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4430c394 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:50:50, skipping insertion in model container [2018-01-24 23:50:50,750 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.01 11:50:50" (1/1) ... [2018-01-24 23:50:50,770 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-24 23:50:50,811 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-24 23:50:50,938 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-24 23:50:50,957 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-24 23:50:50,965 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:50:50 WrapperNode [2018-01-24 23:50:50,965 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-24 23:50:50,965 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-24 23:50:50,966 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-24 23:50:50,966 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-24 23:50:50,978 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:50:50" (1/1) ... [2018-01-24 23:50:50,978 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:50:50" (1/1) ... [2018-01-24 23:50:50,988 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:50:50" (1/1) ... [2018-01-24 23:50:50,989 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:50:50" (1/1) ... [2018-01-24 23:50:50,993 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:50:50" (1/1) ... [2018-01-24 23:50:50,996 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:50:50" (1/1) ... [2018-01-24 23:50:50,997 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:50:50" (1/1) ... [2018-01-24 23:50:50,999 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-24 23:50:50,999 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-24 23:50:50,999 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-24 23:50:51,000 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-24 23:50:51,000 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:50:50" (1/1) ... No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-24 23:50:51,045 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-24 23:50:51,045 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-24 23:50:51,045 INFO L136 BoogieDeclarations]: Found implementation of procedure exit [2018-01-24 23:50:51,045 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-24 23:50:51,045 INFO L128 BoogieDeclarations]: Found specification of procedure write~int [2018-01-24 23:50:51,045 INFO L128 BoogieDeclarations]: Found specification of procedure read~int [2018-01-24 23:50:51,045 INFO L128 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2018-01-24 23:50:51,045 INFO L128 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2018-01-24 23:50:51,045 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-01-24 23:50:51,046 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-01-24 23:50:51,046 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-01-24 23:50:51,046 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2018-01-24 23:50:51,046 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-01-24 23:50:51,046 INFO L128 BoogieDeclarations]: Found specification of procedure malloc [2018-01-24 23:50:51,046 INFO L128 BoogieDeclarations]: Found specification of procedure free [2018-01-24 23:50:51,046 INFO L128 BoogieDeclarations]: Found specification of procedure exit [2018-01-24 23:50:51,046 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-24 23:50:51,047 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-24 23:50:51,047 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-24 23:50:51,388 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-24 23:50:51,389 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.01 11:50:51 BoogieIcfgContainer [2018-01-24 23:50:51,389 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-24 23:50:51,390 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-01-24 23:50:51,390 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-01-24 23:50:51,392 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-01-24 23:50:51,393 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.01 11:50:50" (1/3) ... [2018-01-24 23:50:51,394 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d71bd20 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.01 11:50:51, skipping insertion in model container [2018-01-24 23:50:51,394 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:50:50" (2/3) ... [2018-01-24 23:50:51,394 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d71bd20 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.01 11:50:51, skipping insertion in model container [2018-01-24 23:50:51,394 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.01 11:50:51" (3/3) ... [2018-01-24 23:50:51,396 INFO L105 eAbstractionObserver]: Analyzing ICFG list-ext_false-unreach-call_false-valid-deref.i [2018-01-24 23:50:51,403 INFO L130 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-01-24 23:50:51,409 INFO L142 ceAbstractionStarter]: Appying trace abstraction to program that has 33 error locations. [2018-01-24 23:50:51,450 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-24 23:50:51,450 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-24 23:50:51,450 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-24 23:50:51,450 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-24 23:50:51,450 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-24 23:50:51,451 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-24 23:50:51,451 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-24 23:50:51,451 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-01-24 23:50:51,451 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-24 23:50:51,468 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states. [2018-01-24 23:50:51,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-01-24 23:50:51,474 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 23:50:51,475 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 23:50:51,475 INFO L371 AbstractCegarLoop]: === Iteration 1 === [mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr28RequiresViolation, mainErr26RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr0RequiresViolation, mainErr21RequiresViolation, mainErr31RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr15RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr32EnsuresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr17RequiresViolation, mainErr9RequiresViolation, mainErr30RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr11RequiresViolation, mainErr24RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr4RequiresViolation, mainErr14RequiresViolation]=== [2018-01-24 23:50:51,479 INFO L82 PathProgramCache]: Analyzing trace with hash -2135487731, now seen corresponding path program 1 times [2018-01-24 23:50:51,480 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 23:50:51,518 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:50:51,518 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 23:50:51,518 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:50:51,518 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 23:50:51,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 23:50:51,565 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 23:50:51,597 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 23:50:51,599 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 23:50:51,599 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-24 23:50:51,599 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 23:50:51,602 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-24 23:50:51,612 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-24 23:50:51,612 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-24 23:50:51,614 INFO L87 Difference]: Start difference. First operand 99 states. Second operand 2 states. [2018-01-24 23:50:51,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 23:50:51,716 INFO L93 Difference]: Finished difference Result 169 states and 192 transitions. [2018-01-24 23:50:51,716 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-24 23:50:51,718 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 13 [2018-01-24 23:50:51,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 23:50:51,728 INFO L225 Difference]: With dead ends: 169 [2018-01-24 23:50:51,728 INFO L226 Difference]: Without dead ends: 90 [2018-01-24 23:50:51,732 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-24 23:50:51,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2018-01-24 23:50:51,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2018-01-24 23:50:51,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2018-01-24 23:50:51,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 96 transitions. [2018-01-24 23:50:51,767 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 96 transitions. Word has length 13 [2018-01-24 23:50:51,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 23:50:51,767 INFO L432 AbstractCegarLoop]: Abstraction has 90 states and 96 transitions. [2018-01-24 23:50:51,767 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-24 23:50:51,767 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 96 transitions. [2018-01-24 23:50:51,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-01-24 23:50:51,768 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 23:50:51,768 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 23:50:51,768 INFO L371 AbstractCegarLoop]: === Iteration 2 === [mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr28RequiresViolation, mainErr26RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr0RequiresViolation, mainErr21RequiresViolation, mainErr31RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr15RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr32EnsuresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr17RequiresViolation, mainErr9RequiresViolation, mainErr30RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr11RequiresViolation, mainErr24RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr4RequiresViolation, mainErr14RequiresViolation]=== [2018-01-24 23:50:51,769 INFO L82 PathProgramCache]: Analyzing trace with hash 757106509, now seen corresponding path program 1 times [2018-01-24 23:50:51,769 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 23:50:51,770 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:50:51,770 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 23:50:51,770 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:50:51,771 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 23:50:51,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 23:50:51,790 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 23:50:51,873 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 23:50:51,873 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 23:50:51,873 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-01-24 23:50:51,873 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 23:50:51,875 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-24 23:50:51,875 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-24 23:50:51,876 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-01-24 23:50:51,876 INFO L87 Difference]: Start difference. First operand 90 states and 96 transitions. Second operand 5 states. [2018-01-24 23:50:52,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 23:50:52,255 INFO L93 Difference]: Finished difference Result 127 states and 141 transitions. [2018-01-24 23:50:52,255 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-01-24 23:50:52,256 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2018-01-24 23:50:52,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 23:50:52,257 INFO L225 Difference]: With dead ends: 127 [2018-01-24 23:50:52,258 INFO L226 Difference]: Without dead ends: 111 [2018-01-24 23:50:52,259 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 [2018-01-24 23:50:52,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2018-01-24 23:50:52,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 97. [2018-01-24 23:50:52,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-01-24 23:50:52,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 113 transitions. [2018-01-24 23:50:52,270 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 113 transitions. Word has length 15 [2018-01-24 23:50:52,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 23:50:52,270 INFO L432 AbstractCegarLoop]: Abstraction has 97 states and 113 transitions. [2018-01-24 23:50:52,270 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-24 23:50:52,271 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 113 transitions. [2018-01-24 23:50:52,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-01-24 23:50:52,271 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 23:50:52,271 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 23:50:52,271 INFO L371 AbstractCegarLoop]: === Iteration 3 === [mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr28RequiresViolation, mainErr26RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr0RequiresViolation, mainErr21RequiresViolation, mainErr31RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr15RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr32EnsuresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr17RequiresViolation, mainErr9RequiresViolation, mainErr30RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr11RequiresViolation, mainErr24RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr4RequiresViolation, mainErr14RequiresViolation]=== [2018-01-24 23:50:52,272 INFO L82 PathProgramCache]: Analyzing trace with hash 757106510, now seen corresponding path program 1 times [2018-01-24 23:50:52,272 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 23:50:52,273 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:50:52,273 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 23:50:52,273 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:50:52,273 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 23:50:52,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 23:50:52,288 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 23:50:52,377 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 23:50:52,377 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 23:50:52,377 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-01-24 23:50:52,377 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 23:50:52,378 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-24 23:50:52,378 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-24 23:50:52,378 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-01-24 23:50:52,378 INFO L87 Difference]: Start difference. First operand 97 states and 113 transitions. Second operand 5 states. [2018-01-24 23:50:52,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 23:50:52,570 INFO L93 Difference]: Finished difference Result 146 states and 159 transitions. [2018-01-24 23:50:52,571 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-24 23:50:52,571 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2018-01-24 23:50:52,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 23:50:52,572 INFO L225 Difference]: With dead ends: 146 [2018-01-24 23:50:52,572 INFO L226 Difference]: Without dead ends: 130 [2018-01-24 23:50:52,573 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 [2018-01-24 23:50:52,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2018-01-24 23:50:52,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 119. [2018-01-24 23:50:52,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2018-01-24 23:50:52,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 133 transitions. [2018-01-24 23:50:52,586 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 133 transitions. Word has length 15 [2018-01-24 23:50:52,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 23:50:52,587 INFO L432 AbstractCegarLoop]: Abstraction has 119 states and 133 transitions. [2018-01-24 23:50:52,587 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-24 23:50:52,587 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 133 transitions. [2018-01-24 23:50:52,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-01-24 23:50:52,588 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 23:50:52,588 INFO L322 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 23:50:52,588 INFO L371 AbstractCegarLoop]: === Iteration 4 === [mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr28RequiresViolation, mainErr26RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr0RequiresViolation, mainErr21RequiresViolation, mainErr31RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr15RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr32EnsuresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr17RequiresViolation, mainErr9RequiresViolation, mainErr30RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr11RequiresViolation, mainErr24RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr4RequiresViolation, mainErr14RequiresViolation]=== [2018-01-24 23:50:52,589 INFO L82 PathProgramCache]: Analyzing trace with hash 1442918817, now seen corresponding path program 1 times [2018-01-24 23:50:52,589 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 23:50:52,590 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:50:52,590 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 23:50:52,590 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:50:52,590 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 23:50:52,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 23:50:52,612 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 23:50:52,687 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 23:50:52,687 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 23:50:52,688 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-01-24 23:50:52,688 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 23:50:52,688 INFO L409 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-01-24 23:50:52,689 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-01-24 23:50:52,689 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-01-24 23:50:52,689 INFO L87 Difference]: Start difference. First operand 119 states and 133 transitions. Second operand 7 states. [2018-01-24 23:50:53,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 23:50:53,102 INFO L93 Difference]: Finished difference Result 229 states and 256 transitions. [2018-01-24 23:50:53,102 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-01-24 23:50:53,102 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 26 [2018-01-24 23:50:53,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 23:50:53,106 INFO L225 Difference]: With dead ends: 229 [2018-01-24 23:50:53,106 INFO L226 Difference]: Without dead ends: 226 [2018-01-24 23:50:53,107 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 [2018-01-24 23:50:53,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2018-01-24 23:50:53,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 124. [2018-01-24 23:50:53,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2018-01-24 23:50:53,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 142 transitions. [2018-01-24 23:50:53,123 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 142 transitions. Word has length 26 [2018-01-24 23:50:53,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 23:50:53,124 INFO L432 AbstractCegarLoop]: Abstraction has 124 states and 142 transitions. [2018-01-24 23:50:53,124 INFO L433 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-01-24 23:50:53,124 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 142 transitions. [2018-01-24 23:50:53,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-01-24 23:50:53,125 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 23:50:53,126 INFO L322 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 23:50:53,126 INFO L371 AbstractCegarLoop]: === Iteration 5 === [mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr28RequiresViolation, mainErr26RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr0RequiresViolation, mainErr21RequiresViolation, mainErr31RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr15RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr32EnsuresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr17RequiresViolation, mainErr9RequiresViolation, mainErr30RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr11RequiresViolation, mainErr24RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr4RequiresViolation, mainErr14RequiresViolation]=== [2018-01-24 23:50:53,126 INFO L82 PathProgramCache]: Analyzing trace with hash 1442918818, now seen corresponding path program 1 times [2018-01-24 23:50:53,126 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 23:50:53,127 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:50:53,128 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 23:50:53,128 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:50:53,128 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 23:50:53,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 23:50:53,146 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 23:50:53,257 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 23:50:53,257 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 23:50:53,258 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-01-24 23:50:53,258 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 23:50:53,258 INFO L409 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-01-24 23:50:53,259 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-01-24 23:50:53,259 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-01-24 23:50:53,259 INFO L87 Difference]: Start difference. First operand 124 states and 142 transitions. Second operand 7 states. [2018-01-24 23:50:53,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 23:50:53,689 INFO L93 Difference]: Finished difference Result 249 states and 278 transitions. [2018-01-24 23:50:53,689 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-01-24 23:50:53,690 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 26 [2018-01-24 23:50:53,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 23:50:53,691 INFO L225 Difference]: With dead ends: 249 [2018-01-24 23:50:53,691 INFO L226 Difference]: Without dead ends: 242 [2018-01-24 23:50:53,692 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2018-01-24 23:50:53,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2018-01-24 23:50:53,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 105. [2018-01-24 23:50:53,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2018-01-24 23:50:53,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 117 transitions. [2018-01-24 23:50:53,704 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 117 transitions. Word has length 26 [2018-01-24 23:50:53,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 23:50:53,705 INFO L432 AbstractCegarLoop]: Abstraction has 105 states and 117 transitions. [2018-01-24 23:50:53,705 INFO L433 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-01-24 23:50:53,706 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 117 transitions. [2018-01-24 23:50:53,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-01-24 23:50:53,707 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 23:50:53,707 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] [2018-01-24 23:50:53,707 INFO L371 AbstractCegarLoop]: === Iteration 6 === [mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr28RequiresViolation, mainErr26RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr0RequiresViolation, mainErr21RequiresViolation, mainErr31RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr15RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr32EnsuresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr17RequiresViolation, mainErr9RequiresViolation, mainErr30RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr11RequiresViolation, mainErr24RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr4RequiresViolation, mainErr14RequiresViolation]=== [2018-01-24 23:50:53,707 INFO L82 PathProgramCache]: Analyzing trace with hash 317364595, now seen corresponding path program 1 times [2018-01-24 23:50:53,708 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 23:50:53,709 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:50:53,709 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 23:50:53,709 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:50:53,709 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 23:50:53,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 23:50:53,724 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 23:50:53,769 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 23:50:53,769 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 23:50:53,769 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-01-24 23:50:53,769 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 23:50:53,769 INFO L409 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-01-24 23:50:53,770 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-01-24 23:50:53,770 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-01-24 23:50:53,770 INFO L87 Difference]: Start difference. First operand 105 states and 117 transitions. Second operand 6 states. [2018-01-24 23:50:53,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 23:50:53,925 INFO L93 Difference]: Finished difference Result 233 states and 255 transitions. [2018-01-24 23:50:53,925 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-01-24 23:50:53,925 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 27 [2018-01-24 23:50:53,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 23:50:53,926 INFO L225 Difference]: With dead ends: 233 [2018-01-24 23:50:53,926 INFO L226 Difference]: Without dead ends: 187 [2018-01-24 23:50:53,927 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2018-01-24 23:50:53,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2018-01-24 23:50:53,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 118. [2018-01-24 23:50:53,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2018-01-24 23:50:53,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 134 transitions. [2018-01-24 23:50:53,940 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 134 transitions. Word has length 27 [2018-01-24 23:50:53,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 23:50:53,940 INFO L432 AbstractCegarLoop]: Abstraction has 118 states and 134 transitions. [2018-01-24 23:50:53,940 INFO L433 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-01-24 23:50:53,940 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 134 transitions. [2018-01-24 23:50:53,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-01-24 23:50:53,942 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 23:50:53,942 INFO L322 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 23:50:53,942 INFO L371 AbstractCegarLoop]: === Iteration 7 === [mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr28RequiresViolation, mainErr26RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr0RequiresViolation, mainErr21RequiresViolation, mainErr31RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr15RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr32EnsuresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr17RequiresViolation, mainErr9RequiresViolation, mainErr30RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr11RequiresViolation, mainErr24RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr4RequiresViolation, mainErr14RequiresViolation]=== [2018-01-24 23:50:53,943 INFO L82 PathProgramCache]: Analyzing trace with hash 135192649, now seen corresponding path program 1 times [2018-01-24 23:50:53,943 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 23:50:53,944 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:50:53,944 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 23:50:53,944 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:50:53,944 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 23:50:53,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 23:50:53,960 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 23:50:54,040 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 23:50:54,040 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 23:50:54,041 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-01-24 23:50:54,041 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 23:50:54,041 INFO L409 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-01-24 23:50:54,041 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-01-24 23:50:54,041 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-01-24 23:50:54,041 INFO L87 Difference]: Start difference. First operand 118 states and 134 transitions. Second operand 7 states. [2018-01-24 23:50:54,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 23:50:54,224 INFO L93 Difference]: Finished difference Result 159 states and 179 transitions. [2018-01-24 23:50:54,224 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-01-24 23:50:54,224 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 30 [2018-01-24 23:50:54,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 23:50:54,225 INFO L225 Difference]: With dead ends: 159 [2018-01-24 23:50:54,225 INFO L226 Difference]: Without dead ends: 157 [2018-01-24 23:50:54,226 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 [2018-01-24 23:50:54,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2018-01-24 23:50:54,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 116. [2018-01-24 23:50:54,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2018-01-24 23:50:54,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 132 transitions. [2018-01-24 23:50:54,234 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 132 transitions. Word has length 30 [2018-01-24 23:50:54,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 23:50:54,234 INFO L432 AbstractCegarLoop]: Abstraction has 116 states and 132 transitions. [2018-01-24 23:50:54,234 INFO L433 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-01-24 23:50:54,234 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 132 transitions. [2018-01-24 23:50:54,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-01-24 23:50:54,235 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 23:50:54,235 INFO L322 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 23:50:54,235 INFO L371 AbstractCegarLoop]: === Iteration 8 === [mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr28RequiresViolation, mainErr26RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr0RequiresViolation, mainErr21RequiresViolation, mainErr31RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr15RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr32EnsuresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr17RequiresViolation, mainErr9RequiresViolation, mainErr30RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr11RequiresViolation, mainErr24RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr4RequiresViolation, mainErr14RequiresViolation]=== [2018-01-24 23:50:54,235 INFO L82 PathProgramCache]: Analyzing trace with hash 135192650, now seen corresponding path program 1 times [2018-01-24 23:50:54,236 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 23:50:54,236 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:50:54,236 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 23:50:54,236 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:50:54,237 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 23:50:54,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 23:50:54,250 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 23:50:54,359 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 23:50:54,359 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 23:50:54,360 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-01-24 23:50:54,360 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 23:50:54,360 INFO L409 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-01-24 23:50:54,360 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-01-24 23:50:54,361 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-01-24 23:50:54,361 INFO L87 Difference]: Start difference. First operand 116 states and 132 transitions. Second operand 7 states. [2018-01-24 23:50:54,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 23:50:54,696 INFO L93 Difference]: Finished difference Result 175 states and 196 transitions. [2018-01-24 23:50:54,696 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-01-24 23:50:54,696 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 30 [2018-01-24 23:50:54,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 23:50:54,697 INFO L225 Difference]: With dead ends: 175 [2018-01-24 23:50:54,698 INFO L226 Difference]: Without dead ends: 171 [2018-01-24 23:50:54,698 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 [2018-01-24 23:50:54,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2018-01-24 23:50:54,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 101. [2018-01-24 23:50:54,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-01-24 23:50:54,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 115 transitions. [2018-01-24 23:50:54,708 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 115 transitions. Word has length 30 [2018-01-24 23:50:54,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 23:50:54,708 INFO L432 AbstractCegarLoop]: Abstraction has 101 states and 115 transitions. [2018-01-24 23:50:54,708 INFO L433 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-01-24 23:50:54,708 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 115 transitions. [2018-01-24 23:50:54,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-01-24 23:50:54,709 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 23:50:54,709 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, 1, 1, 1] [2018-01-24 23:50:54,710 INFO L371 AbstractCegarLoop]: === Iteration 9 === [mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr28RequiresViolation, mainErr26RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr0RequiresViolation, mainErr21RequiresViolation, mainErr31RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr15RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr32EnsuresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr17RequiresViolation, mainErr9RequiresViolation, mainErr30RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr11RequiresViolation, mainErr24RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr4RequiresViolation, mainErr14RequiresViolation]=== [2018-01-24 23:50:54,710 INFO L82 PathProgramCache]: Analyzing trace with hash 1848368372, now seen corresponding path program 1 times [2018-01-24 23:50:54,710 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 23:50:54,711 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:50:54,711 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 23:50:54,711 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:50:54,711 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 23:50:54,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 23:50:54,722 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 23:50:54,780 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 23:50:54,780 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 23:50:54,780 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-01-24 23:50:54,780 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 23:50:54,781 INFO L409 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-01-24 23:50:54,781 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-01-24 23:50:54,781 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-01-24 23:50:54,781 INFO L87 Difference]: Start difference. First operand 101 states and 115 transitions. Second operand 6 states. [2018-01-24 23:50:54,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 23:50:54,977 INFO L93 Difference]: Finished difference Result 192 states and 208 transitions. [2018-01-24 23:50:54,977 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-01-24 23:50:54,977 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 30 [2018-01-24 23:50:54,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 23:50:54,978 INFO L225 Difference]: With dead ends: 192 [2018-01-24 23:50:54,979 INFO L226 Difference]: Without dead ends: 156 [2018-01-24 23:50:54,979 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2018-01-24 23:50:54,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2018-01-24 23:50:54,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 104. [2018-01-24 23:50:54,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2018-01-24 23:50:54,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 118 transitions. [2018-01-24 23:50:54,989 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 118 transitions. Word has length 30 [2018-01-24 23:50:54,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 23:50:54,990 INFO L432 AbstractCegarLoop]: Abstraction has 104 states and 118 transitions. [2018-01-24 23:50:54,990 INFO L433 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-01-24 23:50:54,990 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 118 transitions. [2018-01-24 23:50:54,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-01-24 23:50:54,991 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 23:50:54,991 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 23:50:54,991 INFO L371 AbstractCegarLoop]: === Iteration 10 === [mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr28RequiresViolation, mainErr26RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr0RequiresViolation, mainErr21RequiresViolation, mainErr31RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr15RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr32EnsuresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr17RequiresViolation, mainErr9RequiresViolation, mainErr30RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr11RequiresViolation, mainErr24RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr4RequiresViolation, mainErr14RequiresViolation]=== [2018-01-24 23:50:54,992 INFO L82 PathProgramCache]: Analyzing trace with hash 772815435, now seen corresponding path program 1 times [2018-01-24 23:50:54,992 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 23:50:54,992 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:50:54,993 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 23:50:54,993 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:50:54,993 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 23:50:55,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 23:50:55,005 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 23:50:55,036 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 23:50:55,037 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 23:50:55,037 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-24 23:50:55,037 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 23:50:55,037 INFO L409 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-01-24 23:50:55,037 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-01-24 23:50:55,038 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-01-24 23:50:55,038 INFO L87 Difference]: Start difference. First operand 104 states and 118 transitions. Second operand 3 states. [2018-01-24 23:50:55,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 23:50:55,060 INFO L93 Difference]: Finished difference Result 129 states and 144 transitions. [2018-01-24 23:50:55,060 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-01-24 23:50:55,061 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 35 [2018-01-24 23:50:55,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 23:50:55,062 INFO L225 Difference]: With dead ends: 129 [2018-01-24 23:50:55,062 INFO L226 Difference]: Without dead ends: 95 [2018-01-24 23:50:55,062 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-01-24 23:50:55,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-01-24 23:50:55,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2018-01-24 23:50:55,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2018-01-24 23:50:55,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 107 transitions. [2018-01-24 23:50:55,071 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 107 transitions. Word has length 35 [2018-01-24 23:50:55,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 23:50:55,071 INFO L432 AbstractCegarLoop]: Abstraction has 95 states and 107 transitions. [2018-01-24 23:50:55,071 INFO L433 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-01-24 23:50:55,072 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 107 transitions. [2018-01-24 23:50:55,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-01-24 23:50:55,073 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 23:50:55,073 INFO L322 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 23:50:55,073 INFO L371 AbstractCegarLoop]: === Iteration 11 === [mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr28RequiresViolation, mainErr26RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr0RequiresViolation, mainErr21RequiresViolation, mainErr31RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr15RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr2RequiresViolation, mainErr32EnsuresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr27RequiresViolation, mainErr1RequiresViolation, mainErr17RequiresViolation, mainErr9RequiresViolation, mainErr30RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr11RequiresViolation, mainErr24RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr4RequiresViolation, mainErr14RequiresViolation]=== [2018-01-24 23:50:55,073 INFO L82 PathProgramCache]: Analyzing trace with hash -1113019023, now seen corresponding path program 1 times [2018-01-24 23:50:55,073 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 23:50:55,074 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:50:55,074 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 23:50:55,075 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:50:55,075 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 23:50:55,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 23:50:55,099 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 23:50:55,395 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 23:50:55,396 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-24 23:50:55,396 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-24 23:50:55,397 INFO L199 CegarAbsIntRunner]: Running AI on error trace of length 39 with the following transitions: [2018-01-24 23:50:55,399 INFO L201 CegarAbsIntRunner]: [0], [1], [2], [8], [10], [14], [16], [19], [25], [52], [54], [57], [63], [65], [66], [69], [70], [76], [78], [81], [84], [88], [91], [95], [97], [98], [104], [105], [108], [177], [178], [188], [189], [190] [2018-01-24 23:50:55,465 INFO L147 AbstractInterpreter]: Using domain VPDomain [2018-01-24 23:50:55,465 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