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_imprecise.epf -i ../../../trunk/examples/svcomp/memsafety/test-0521_true-valid-memsafety.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-6b94a2f [2018-01-24 17:02:22,367 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-24 17:02:22,368 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-24 17:02:22,382 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-24 17:02:22,383 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-24 17:02:22,383 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-24 17:02:22,385 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-24 17:02:22,386 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-24 17:02:22,388 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-24 17:02:22,389 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-24 17:02:22,390 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-01-24 17:02:22,390 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-01-24 17:02:22,391 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-01-24 17:02:22,392 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-01-24 17:02:22,393 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-01-24 17:02:22,396 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-01-24 17:02:22,398 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-01-24 17:02:22,399 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-01-24 17:02:22,400 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-01-24 17:02:22,402 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-01-24 17:02:22,404 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-01-24 17:02:22,404 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-01-24 17:02:22,404 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-01-24 17:02:22,405 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-01-24 17:02:22,406 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-01-24 17:02:22,407 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-01-24 17:02:22,407 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-01-24 17:02:22,408 INFO L177 SettingsManager]: PEA to Boogie provides no preferences, ignoring... [2018-01-24 17:02:22,408 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-01-24 17:02:22,408 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-01-24 17:02:22,409 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-01-24 17:02:22,409 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_imprecise.epf [2018-01-24 17:02:22,419 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-24 17:02:22,419 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-24 17:02:22,420 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-24 17:02:22,420 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-24 17:02:22,420 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-24 17:02:22,420 INFO L133 SettingsManager]: * Deactivate Weak Equivalences=true [2018-01-24 17:02:22,421 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-24 17:02:22,421 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-24 17:02:22,421 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-24 17:02:22,421 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-24 17:02:22,422 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-24 17:02:22,422 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-24 17:02:22,422 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-24 17:02:22,422 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-24 17:02:22,422 INFO L133 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2018-01-24 17:02:22,423 INFO L133 SettingsManager]: * Bitprecise bitfields=true [2018-01-24 17:02:22,423 INFO L133 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2018-01-24 17:02:22,423 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-24 17:02:22,423 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-24 17:02:22,423 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-24 17:02:22,424 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-01-24 17:02:22,424 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-24 17:02:22,424 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-24 17:02:22,424 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-24 17:02:22,424 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-24 17:02:22,425 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-24 17:02:22,425 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-24 17:02:22,425 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-24 17:02:22,425 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-24 17:02:22,425 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-01-24 17:02:22,425 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-24 17:02:22,426 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-24 17:02:22,426 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-24 17:02:22,426 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-01-24 17:02:22,427 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-24 17:02:22,427 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-24 17:02:22,460 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-24 17:02:22,473 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-24 17:02:22,476 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-24 17:02:22,478 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-24 17:02:22,478 INFO L276 PluginConnector]: CDTParser initialized [2018-01-24 17:02:22,479 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/memsafety/test-0521_true-valid-memsafety.i [2018-01-24 17:02:22,645 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-24 17:02:22,651 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-24 17:02:22,652 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-24 17:02:22,652 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-24 17:02:22,659 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-24 17:02:22,660 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.01 05:02:22" (1/1) ... [2018-01-24 17:02:22,664 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@376b2429 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 05:02:22, skipping insertion in model container [2018-01-24 17:02:22,664 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.01 05:02:22" (1/1) ... [2018-01-24 17:02:22,684 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-24 17:02:22,726 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-24 17:02:22,849 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-24 17:02:22,877 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-24 17:02:22,887 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 05:02:22 WrapperNode [2018-01-24 17:02:22,887 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-24 17:02:22,888 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-24 17:02:22,888 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-24 17:02:22,888 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-24 17:02:22,898 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 05:02:22" (1/1) ... [2018-01-24 17:02:22,899 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 05:02:22" (1/1) ... [2018-01-24 17:02:22,911 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 05:02:22" (1/1) ... [2018-01-24 17:02:22,911 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 05:02:22" (1/1) ... [2018-01-24 17:02:22,921 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 05:02:22" (1/1) ... [2018-01-24 17:02:22,927 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 05:02:22" (1/1) ... [2018-01-24 17:02:22,930 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 05:02:22" (1/1) ... [2018-01-24 17:02:22,934 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-24 17:02:22,934 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-24 17:02:22,935 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-24 17:02:22,935 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-24 17:02:22,936 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 05:02:22" (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 17:02:22,979 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-24 17:02:22,980 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-24 17:02:22,980 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-24 17:02:22,980 INFO L128 BoogieDeclarations]: Found specification of procedure write~int [2018-01-24 17:02:22,980 INFO L128 BoogieDeclarations]: Found specification of procedure read~int [2018-01-24 17:02:22,980 INFO L128 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2018-01-24 17:02:22,980 INFO L128 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2018-01-24 17:02:22,980 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-01-24 17:02:22,980 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-01-24 17:02:22,980 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-01-24 17:02:22,981 INFO L128 BoogieDeclarations]: Found specification of procedure free [2018-01-24 17:02:22,981 INFO L128 BoogieDeclarations]: Found specification of procedure abort [2018-01-24 17:02:22,981 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-01-24 17:02:22,981 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-24 17:02:22,981 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-24 17:02:22,981 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-24 17:02:23,703 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-24 17:02:23,704 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.01 05:02:23 BoogieIcfgContainer [2018-01-24 17:02:23,704 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-24 17:02:23,706 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-01-24 17:02:23,706 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-01-24 17:02:23,708 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-01-24 17:02:23,709 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.01 05:02:22" (1/3) ... [2018-01-24 17:02:23,710 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a449725 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.01 05:02:23, skipping insertion in model container [2018-01-24 17:02:23,710 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 05:02:22" (2/3) ... [2018-01-24 17:02:23,710 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a449725 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.01 05:02:23, skipping insertion in model container [2018-01-24 17:02:23,711 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.01 05:02:23" (3/3) ... [2018-01-24 17:02:23,712 INFO L105 eAbstractionObserver]: Analyzing ICFG test-0521_true-valid-memsafety.i [2018-01-24 17:02:23,719 INFO L130 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-01-24 17:02:23,726 INFO L142 ceAbstractionStarter]: Appying trace abstraction to program that has 91 error locations. [2018-01-24 17:02:23,791 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-24 17:02:23,791 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-24 17:02:23,791 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-24 17:02:23,792 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-24 17:02:23,792 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-24 17:02:23,792 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-24 17:02:23,792 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-24 17:02:23,792 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-01-24 17:02:23,793 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-24 17:02:23,821 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states. [2018-01-24 17:02:23,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-01-24 17:02:23,828 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 17:02:23,829 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 17:02:23,830 INFO L371 AbstractCegarLoop]: === Iteration 1 === [mainErr51RequiresViolation, mainErr69RequiresViolation, mainErr26RequiresViolation, mainErr54RequiresViolation, mainErr66RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr82RequiresViolation, mainErr74RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr89RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr58RequiresViolation, mainErr62RequiresViolation, mainErr15RequiresViolation, mainErr49RequiresViolation, mainErr12RequiresViolation, mainErr71RequiresViolation, mainErr6RequiresViolation, mainErr85RequiresViolation, mainErr35RequiresViolation, mainErr55RequiresViolation, mainErr65RequiresViolation, mainErr70RequiresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr78RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr57RequiresViolation, mainErr63RequiresViolation, mainErr77RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr76RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr50RequiresViolation, mainErr37RequiresViolation, mainErr83RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr84RequiresViolation, mainErr61RequiresViolation, mainErr59RequiresViolation, mainErr28RequiresViolation, mainErr87RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr56RequiresViolation, mainErr79RequiresViolation, mainErr64RequiresViolation, mainErr48RequiresViolation, mainErr72RequiresViolation, mainErr39RequiresViolation, mainErr81RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr90EnsuresViolation, mainErr2RequiresViolation, mainErr52RequiresViolation, mainErr68RequiresViolation, mainErr45RequiresViolation, mainErr75RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr88RequiresViolation, mainErr1RequiresViolation, mainErr60RequiresViolation, mainErr9RequiresViolation, mainErr80RequiresViolation, mainErr67RequiresViolation, mainErr53RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr86RequiresViolation, mainErr47RequiresViolation, mainErr73RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 17:02:23,835 INFO L82 PathProgramCache]: Analyzing trace with hash 2006593009, now seen corresponding path program 1 times [2018-01-24 17:02:23,837 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 17:02:23,885 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 17:02:23,885 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 17:02:23,885 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 17:02:23,885 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 17:02:23,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 17:02:23,921 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 17:02:23,949 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 17:02:23,951 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 17:02:23,951 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-24 17:02:23,951 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 17:02:23,954 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-24 17:02:24,048 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-24 17:02:24,049 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-24 17:02:24,051 INFO L87 Difference]: Start difference. First operand 247 states. Second operand 2 states. [2018-01-24 17:02:24,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 17:02:24,095 INFO L93 Difference]: Finished difference Result 488 states and 562 transitions. [2018-01-24 17:02:24,095 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-24 17:02:24,096 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2018-01-24 17:02:24,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 17:02:24,111 INFO L225 Difference]: With dead ends: 488 [2018-01-24 17:02:24,112 INFO L226 Difference]: Without dead ends: 244 [2018-01-24 17:02:24,117 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 17:02:24,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2018-01-24 17:02:24,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 244. [2018-01-24 17:02:24,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 244 states. [2018-01-24 17:02:24,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 271 transitions. [2018-01-24 17:02:24,171 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 271 transitions. Word has length 10 [2018-01-24 17:02:24,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 17:02:24,171 INFO L432 AbstractCegarLoop]: Abstraction has 244 states and 271 transitions. [2018-01-24 17:02:24,171 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-24 17:02:24,172 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 271 transitions. [2018-01-24 17:02:24,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-01-24 17:02:24,172 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 17:02:24,173 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 17:02:24,173 INFO L371 AbstractCegarLoop]: === Iteration 2 === [mainErr51RequiresViolation, mainErr69RequiresViolation, mainErr26RequiresViolation, mainErr54RequiresViolation, mainErr66RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr82RequiresViolation, mainErr74RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr89RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr58RequiresViolation, mainErr62RequiresViolation, mainErr15RequiresViolation, mainErr49RequiresViolation, mainErr12RequiresViolation, mainErr71RequiresViolation, mainErr6RequiresViolation, mainErr85RequiresViolation, mainErr35RequiresViolation, mainErr55RequiresViolation, mainErr65RequiresViolation, mainErr70RequiresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr78RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr57RequiresViolation, mainErr63RequiresViolation, mainErr77RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr76RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr50RequiresViolation, mainErr37RequiresViolation, mainErr83RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr84RequiresViolation, mainErr61RequiresViolation, mainErr59RequiresViolation, mainErr28RequiresViolation, mainErr87RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr56RequiresViolation, mainErr79RequiresViolation, mainErr64RequiresViolation, mainErr48RequiresViolation, mainErr72RequiresViolation, mainErr39RequiresViolation, mainErr81RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr90EnsuresViolation, mainErr2RequiresViolation, mainErr52RequiresViolation, mainErr68RequiresViolation, mainErr45RequiresViolation, mainErr75RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr88RequiresViolation, mainErr1RequiresViolation, mainErr60RequiresViolation, mainErr9RequiresViolation, mainErr80RequiresViolation, mainErr67RequiresViolation, mainErr53RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr86RequiresViolation, mainErr47RequiresViolation, mainErr73RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 17:02:24,173 INFO L82 PathProgramCache]: Analyzing trace with hash -1287736010, now seen corresponding path program 1 times [2018-01-24 17:02:24,173 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 17:02:24,174 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 17:02:24,174 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 17:02:24,175 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 17:02:24,175 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 17:02:24,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 17:02:24,190 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 17:02:24,268 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 17:02:24,268 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 17:02:24,268 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-01-24 17:02:24,268 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 17:02:24,270 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-24 17:02:24,270 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-24 17:02:24,270 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-24 17:02:24,270 INFO L87 Difference]: Start difference. First operand 244 states and 271 transitions. Second operand 4 states. [2018-01-24 17:02:24,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 17:02:24,517 INFO L93 Difference]: Finished difference Result 773 states and 860 transitions. [2018-01-24 17:02:24,517 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-24 17:02:24,517 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2018-01-24 17:02:24,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 17:02:24,522 INFO L225 Difference]: With dead ends: 773 [2018-01-24 17:02:24,523 INFO L226 Difference]: Without dead ends: 561 [2018-01-24 17:02:24,525 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-01-24 17:02:24,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 561 states. [2018-01-24 17:02:24,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 561 to 256. [2018-01-24 17:02:24,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2018-01-24 17:02:24,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 285 transitions. [2018-01-24 17:02:24,549 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 285 transitions. Word has length 12 [2018-01-24 17:02:24,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 17:02:24,549 INFO L432 AbstractCegarLoop]: Abstraction has 256 states and 285 transitions. [2018-01-24 17:02:24,549 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-24 17:02:24,550 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 285 transitions. [2018-01-24 17:02:24,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-01-24 17:02:24,550 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 17:02:24,550 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 17:02:24,550 INFO L371 AbstractCegarLoop]: === Iteration 3 === [mainErr51RequiresViolation, mainErr69RequiresViolation, mainErr26RequiresViolation, mainErr54RequiresViolation, mainErr66RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr82RequiresViolation, mainErr74RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr89RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr58RequiresViolation, mainErr62RequiresViolation, mainErr15RequiresViolation, mainErr49RequiresViolation, mainErr12RequiresViolation, mainErr71RequiresViolation, mainErr6RequiresViolation, mainErr85RequiresViolation, mainErr35RequiresViolation, mainErr55RequiresViolation, mainErr65RequiresViolation, mainErr70RequiresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr78RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr57RequiresViolation, mainErr63RequiresViolation, mainErr77RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr76RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr50RequiresViolation, mainErr37RequiresViolation, mainErr83RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr84RequiresViolation, mainErr61RequiresViolation, mainErr59RequiresViolation, mainErr28RequiresViolation, mainErr87RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr56RequiresViolation, mainErr79RequiresViolation, mainErr64RequiresViolation, mainErr48RequiresViolation, mainErr72RequiresViolation, mainErr39RequiresViolation, mainErr81RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr90EnsuresViolation, mainErr2RequiresViolation, mainErr52RequiresViolation, mainErr68RequiresViolation, mainErr45RequiresViolation, mainErr75RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr88RequiresViolation, mainErr1RequiresViolation, mainErr60RequiresViolation, mainErr9RequiresViolation, mainErr80RequiresViolation, mainErr67RequiresViolation, mainErr53RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr86RequiresViolation, mainErr47RequiresViolation, mainErr73RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 17:02:24,551 INFO L82 PathProgramCache]: Analyzing trace with hash -1264312096, now seen corresponding path program 1 times [2018-01-24 17:02:24,551 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 17:02:24,552 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 17:02:24,552 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 17:02:24,552 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 17:02:24,552 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 17:02:24,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 17:02:24,565 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 17:02:24,600 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 17:02:24,600 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 17:02:24,600 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-24 17:02:24,600 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 17:02:24,601 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-24 17:02:24,601 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-24 17:02:24,601 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-24 17:02:24,601 INFO L87 Difference]: Start difference. First operand 256 states and 285 transitions. Second operand 4 states. [2018-01-24 17:02:25,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 17:02:25,041 INFO L93 Difference]: Finished difference Result 418 states and 466 transitions. [2018-01-24 17:02:25,041 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-01-24 17:02:25,041 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2018-01-24 17:02:25,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 17:02:25,044 INFO L225 Difference]: With dead ends: 418 [2018-01-24 17:02:25,044 INFO L226 Difference]: Without dead ends: 416 [2018-01-24 17:02:25,045 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-01-24 17:02:25,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2018-01-24 17:02:25,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 254. [2018-01-24 17:02:25,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 254 states. [2018-01-24 17:02:25,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 283 transitions. [2018-01-24 17:02:25,060 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 283 transitions. Word has length 13 [2018-01-24 17:02:25,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 17:02:25,061 INFO L432 AbstractCegarLoop]: Abstraction has 254 states and 283 transitions. [2018-01-24 17:02:25,061 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-24 17:02:25,061 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 283 transitions. [2018-01-24 17:02:25,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-01-24 17:02:25,062 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 17:02:25,062 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 17:02:25,063 INFO L371 AbstractCegarLoop]: === Iteration 4 === [mainErr51RequiresViolation, mainErr69RequiresViolation, mainErr26RequiresViolation, mainErr54RequiresViolation, mainErr66RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr82RequiresViolation, mainErr74RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr89RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr58RequiresViolation, mainErr62RequiresViolation, mainErr15RequiresViolation, mainErr49RequiresViolation, mainErr12RequiresViolation, mainErr71RequiresViolation, mainErr6RequiresViolation, mainErr85RequiresViolation, mainErr35RequiresViolation, mainErr55RequiresViolation, mainErr65RequiresViolation, mainErr70RequiresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr78RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr57RequiresViolation, mainErr63RequiresViolation, mainErr77RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr76RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr50RequiresViolation, mainErr37RequiresViolation, mainErr83RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr84RequiresViolation, mainErr61RequiresViolation, mainErr59RequiresViolation, mainErr28RequiresViolation, mainErr87RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr56RequiresViolation, mainErr79RequiresViolation, mainErr64RequiresViolation, mainErr48RequiresViolation, mainErr72RequiresViolation, mainErr39RequiresViolation, mainErr81RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr90EnsuresViolation, mainErr2RequiresViolation, mainErr52RequiresViolation, mainErr68RequiresViolation, mainErr45RequiresViolation, mainErr75RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr88RequiresViolation, mainErr1RequiresViolation, mainErr60RequiresViolation, mainErr9RequiresViolation, mainErr80RequiresViolation, mainErr67RequiresViolation, mainErr53RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr86RequiresViolation, mainErr47RequiresViolation, mainErr73RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 17:02:25,064 INFO L82 PathProgramCache]: Analyzing trace with hash -1264312095, now seen corresponding path program 1 times [2018-01-24 17:02:25,064 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 17:02:25,065 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 17:02:25,065 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 17:02:25,065 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 17:02:25,065 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 17:02:25,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 17:02:25,074 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 17:02:25,126 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 17:02:25,126 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 17:02:25,126 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-24 17:02:25,126 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 17:02:25,126 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-24 17:02:25,126 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-24 17:02:25,127 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-24 17:02:25,127 INFO L87 Difference]: Start difference. First operand 254 states and 283 transitions. Second operand 4 states. [2018-01-24 17:02:25,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 17:02:25,337 INFO L93 Difference]: Finished difference Result 351 states and 394 transitions. [2018-01-24 17:02:25,338 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-01-24 17:02:25,338 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2018-01-24 17:02:25,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 17:02:25,340 INFO L225 Difference]: With dead ends: 351 [2018-01-24 17:02:25,340 INFO L226 Difference]: Without dead ends: 349 [2018-01-24 17:02:25,340 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-01-24 17:02:25,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2018-01-24 17:02:25,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 252. [2018-01-24 17:02:25,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 252 states. [2018-01-24 17:02:25,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 281 transitions. [2018-01-24 17:02:25,350 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 281 transitions. Word has length 13 [2018-01-24 17:02:25,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 17:02:25,350 INFO L432 AbstractCegarLoop]: Abstraction has 252 states and 281 transitions. [2018-01-24 17:02:25,350 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-24 17:02:25,350 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 281 transitions. [2018-01-24 17:02:25,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-01-24 17:02:25,351 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 17:02:25,351 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 17:02:25,351 INFO L371 AbstractCegarLoop]: === Iteration 5 === [mainErr51RequiresViolation, mainErr69RequiresViolation, mainErr26RequiresViolation, mainErr54RequiresViolation, mainErr66RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr82RequiresViolation, mainErr74RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr89RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr58RequiresViolation, mainErr62RequiresViolation, mainErr15RequiresViolation, mainErr49RequiresViolation, mainErr12RequiresViolation, mainErr71RequiresViolation, mainErr6RequiresViolation, mainErr85RequiresViolation, mainErr35RequiresViolation, mainErr55RequiresViolation, mainErr65RequiresViolation, mainErr70RequiresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr78RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr57RequiresViolation, mainErr63RequiresViolation, mainErr77RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr76RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr50RequiresViolation, mainErr37RequiresViolation, mainErr83RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr84RequiresViolation, mainErr61RequiresViolation, mainErr59RequiresViolation, mainErr28RequiresViolation, mainErr87RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr56RequiresViolation, mainErr79RequiresViolation, mainErr64RequiresViolation, mainErr48RequiresViolation, mainErr72RequiresViolation, mainErr39RequiresViolation, mainErr81RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr90EnsuresViolation, mainErr2RequiresViolation, mainErr52RequiresViolation, mainErr68RequiresViolation, mainErr45RequiresViolation, mainErr75RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr88RequiresViolation, mainErr1RequiresViolation, mainErr60RequiresViolation, mainErr9RequiresViolation, mainErr80RequiresViolation, mainErr67RequiresViolation, mainErr53RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr86RequiresViolation, mainErr47RequiresViolation, mainErr73RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 17:02:25,351 INFO L82 PathProgramCache]: Analyzing trace with hash 184691868, now seen corresponding path program 1 times [2018-01-24 17:02:25,352 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 17:02:25,352 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 17:02:25,353 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 17:02:25,353 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 17:02:25,353 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 17:02:25,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 17:02:25,363 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 17:02:25,418 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 17:02:25,418 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 17:02:25,418 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-24 17:02:25,419 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 17:02:25,419 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-24 17:02:25,419 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-24 17:02:25,419 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-01-24 17:02:25,419 INFO L87 Difference]: Start difference. First operand 252 states and 281 transitions. Second operand 5 states. [2018-01-24 17:02:25,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 17:02:25,510 INFO L93 Difference]: Finished difference Result 499 states and 558 transitions. [2018-01-24 17:02:25,510 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-01-24 17:02:25,510 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2018-01-24 17:02:25,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 17:02:25,513 INFO L225 Difference]: With dead ends: 499 [2018-01-24 17:02:25,513 INFO L226 Difference]: Without dead ends: 327 [2018-01-24 17:02:25,514 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 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 17:02:25,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2018-01-24 17:02:25,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 292. [2018-01-24 17:02:25,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 292 states. [2018-01-24 17:02:25,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 344 transitions. [2018-01-24 17:02:25,527 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 344 transitions. Word has length 20 [2018-01-24 17:02:25,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 17:02:25,527 INFO L432 AbstractCegarLoop]: Abstraction has 292 states and 344 transitions. [2018-01-24 17:02:25,528 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-24 17:02:25,528 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 344 transitions. [2018-01-24 17:02:25,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-01-24 17:02:25,529 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 17:02:25,529 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 17:02:25,529 INFO L371 AbstractCegarLoop]: === Iteration 6 === [mainErr51RequiresViolation, mainErr69RequiresViolation, mainErr26RequiresViolation, mainErr54RequiresViolation, mainErr66RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr82RequiresViolation, mainErr74RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr89RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr58RequiresViolation, mainErr62RequiresViolation, mainErr15RequiresViolation, mainErr49RequiresViolation, mainErr12RequiresViolation, mainErr71RequiresViolation, mainErr6RequiresViolation, mainErr85RequiresViolation, mainErr35RequiresViolation, mainErr55RequiresViolation, mainErr65RequiresViolation, mainErr70RequiresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr78RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr57RequiresViolation, mainErr63RequiresViolation, mainErr77RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr76RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr50RequiresViolation, mainErr37RequiresViolation, mainErr83RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr84RequiresViolation, mainErr61RequiresViolation, mainErr59RequiresViolation, mainErr28RequiresViolation, mainErr87RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr56RequiresViolation, mainErr79RequiresViolation, mainErr64RequiresViolation, mainErr48RequiresViolation, mainErr72RequiresViolation, mainErr39RequiresViolation, mainErr81RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr90EnsuresViolation, mainErr2RequiresViolation, mainErr52RequiresViolation, mainErr68RequiresViolation, mainErr45RequiresViolation, mainErr75RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr88RequiresViolation, mainErr1RequiresViolation, mainErr60RequiresViolation, mainErr9RequiresViolation, mainErr80RequiresViolation, mainErr67RequiresViolation, mainErr53RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr86RequiresViolation, mainErr47RequiresViolation, mainErr73RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 17:02:25,529 INFO L82 PathProgramCache]: Analyzing trace with hash 415972895, now seen corresponding path program 1 times [2018-01-24 17:02:25,530 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 17:02:25,531 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 17:02:25,531 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 17:02:25,531 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 17:02:25,531 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 17:02:25,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 17:02:25,546 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 17:02:25,598 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 17:02:25,598 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 17:02:25,598 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-24 17:02:25,598 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 17:02:25,599 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-24 17:02:25,599 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-24 17:02:25,599 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-24 17:02:25,599 INFO L87 Difference]: Start difference. First operand 292 states and 344 transitions. Second operand 4 states. [2018-01-24 17:02:25,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 17:02:25,839 INFO L93 Difference]: Finished difference Result 456 states and 526 transitions. [2018-01-24 17:02:25,839 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-01-24 17:02:25,839 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2018-01-24 17:02:25,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 17:02:25,842 INFO L225 Difference]: With dead ends: 456 [2018-01-24 17:02:25,842 INFO L226 Difference]: Without dead ends: 454 [2018-01-24 17:02:25,842 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-01-24 17:02:25,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2018-01-24 17:02:25,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 290. [2018-01-24 17:02:25,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 290 states. [2018-01-24 17:02:25,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 342 transitions. [2018-01-24 17:02:25,853 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 342 transitions. Word has length 20 [2018-01-24 17:02:25,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 17:02:25,853 INFO L432 AbstractCegarLoop]: Abstraction has 290 states and 342 transitions. [2018-01-24 17:02:25,853 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-24 17:02:25,854 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 342 transitions. [2018-01-24 17:02:25,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-01-24 17:02:25,854 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 17:02:25,854 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 17:02:25,855 INFO L371 AbstractCegarLoop]: === Iteration 7 === [mainErr51RequiresViolation, mainErr69RequiresViolation, mainErr26RequiresViolation, mainErr54RequiresViolation, mainErr66RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr82RequiresViolation, mainErr74RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr89RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr58RequiresViolation, mainErr62RequiresViolation, mainErr15RequiresViolation, mainErr49RequiresViolation, mainErr12RequiresViolation, mainErr71RequiresViolation, mainErr6RequiresViolation, mainErr85RequiresViolation, mainErr35RequiresViolation, mainErr55RequiresViolation, mainErr65RequiresViolation, mainErr70RequiresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr78RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr57RequiresViolation, mainErr63RequiresViolation, mainErr77RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr76RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr50RequiresViolation, mainErr37RequiresViolation, mainErr83RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr84RequiresViolation, mainErr61RequiresViolation, mainErr59RequiresViolation, mainErr28RequiresViolation, mainErr87RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr56RequiresViolation, mainErr79RequiresViolation, mainErr64RequiresViolation, mainErr48RequiresViolation, mainErr72RequiresViolation, mainErr39RequiresViolation, mainErr81RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr90EnsuresViolation, mainErr2RequiresViolation, mainErr52RequiresViolation, mainErr68RequiresViolation, mainErr45RequiresViolation, mainErr75RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr88RequiresViolation, mainErr1RequiresViolation, mainErr60RequiresViolation, mainErr9RequiresViolation, mainErr80RequiresViolation, mainErr67RequiresViolation, mainErr53RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr86RequiresViolation, mainErr47RequiresViolation, mainErr73RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 17:02:25,855 INFO L82 PathProgramCache]: Analyzing trace with hash 415972896, now seen corresponding path program 1 times [2018-01-24 17:02:25,855 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 17:02:25,856 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 17:02:25,856 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 17:02:25,856 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 17:02:25,856 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 17:02:25,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 17:02:25,869 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 17:02:25,925 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 17:02:25,925 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 17:02:25,925 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-24 17:02:25,925 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 17:02:25,926 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-24 17:02:25,926 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-24 17:02:25,926 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-24 17:02:25,926 INFO L87 Difference]: Start difference. First operand 290 states and 342 transitions. Second operand 4 states. [2018-01-24 17:02:26,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 17:02:26,150 INFO L93 Difference]: Finished difference Result 389 states and 454 transitions. [2018-01-24 17:02:26,150 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-01-24 17:02:26,151 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2018-01-24 17:02:26,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 17:02:26,153 INFO L225 Difference]: With dead ends: 389 [2018-01-24 17:02:26,153 INFO L226 Difference]: Without dead ends: 387 [2018-01-24 17:02:26,153 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-01-24 17:02:26,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2018-01-24 17:02:26,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 288. [2018-01-24 17:02:26,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 288 states. [2018-01-24 17:02:26,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 340 transitions. [2018-01-24 17:02:26,174 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 340 transitions. Word has length 20 [2018-01-24 17:02:26,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 17:02:26,174 INFO L432 AbstractCegarLoop]: Abstraction has 288 states and 340 transitions. [2018-01-24 17:02:26,174 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-24 17:02:26,174 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 340 transitions. [2018-01-24 17:02:26,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-01-24 17:02:26,175 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 17:02:26,175 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] [2018-01-24 17:02:26,176 INFO L371 AbstractCegarLoop]: === Iteration 8 === [mainErr51RequiresViolation, mainErr69RequiresViolation, mainErr26RequiresViolation, mainErr54RequiresViolation, mainErr66RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr82RequiresViolation, mainErr74RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr89RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr58RequiresViolation, mainErr62RequiresViolation, mainErr15RequiresViolation, mainErr49RequiresViolation, mainErr12RequiresViolation, mainErr71RequiresViolation, mainErr6RequiresViolation, mainErr85RequiresViolation, mainErr35RequiresViolation, mainErr55RequiresViolation, mainErr65RequiresViolation, mainErr70RequiresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr78RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr57RequiresViolation, mainErr63RequiresViolation, mainErr77RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr76RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr50RequiresViolation, mainErr37RequiresViolation, mainErr83RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr84RequiresViolation, mainErr61RequiresViolation, mainErr59RequiresViolation, mainErr28RequiresViolation, mainErr87RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr56RequiresViolation, mainErr79RequiresViolation, mainErr64RequiresViolation, mainErr48RequiresViolation, mainErr72RequiresViolation, mainErr39RequiresViolation, mainErr81RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr90EnsuresViolation, mainErr2RequiresViolation, mainErr52RequiresViolation, mainErr68RequiresViolation, mainErr45RequiresViolation, mainErr75RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr88RequiresViolation, mainErr1RequiresViolation, mainErr60RequiresViolation, mainErr9RequiresViolation, mainErr80RequiresViolation, mainErr67RequiresViolation, mainErr53RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr86RequiresViolation, mainErr47RequiresViolation, mainErr73RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 17:02:26,176 INFO L82 PathProgramCache]: Analyzing trace with hash 308407885, now seen corresponding path program 1 times [2018-01-24 17:02:26,176 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 17:02:26,177 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 17:02:26,177 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 17:02:26,177 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 17:02:26,177 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 17:02:26,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 17:02:26,184 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 17:02:26,224 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 17:02:26,224 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 17:02:26,224 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-24 17:02:26,225 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 17:02:26,225 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-24 17:02:26,225 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-24 17:02:26,225 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-01-24 17:02:26,225 INFO L87 Difference]: Start difference. First operand 288 states and 340 transitions. Second operand 5 states. [2018-01-24 17:02:26,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 17:02:26,356 INFO L93 Difference]: Finished difference Result 408 states and 471 transitions. [2018-01-24 17:02:26,357 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-01-24 17:02:26,357 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2018-01-24 17:02:26,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 17:02:26,359 INFO L225 Difference]: With dead ends: 408 [2018-01-24 17:02:26,359 INFO L226 Difference]: Without dead ends: 319 [2018-01-24 17:02:26,359 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2018-01-24 17:02:26,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2018-01-24 17:02:26,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 275. [2018-01-24 17:02:26,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 275 states. [2018-01-24 17:02:26,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 307 transitions. [2018-01-24 17:02:26,369 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 307 transitions. Word has length 23 [2018-01-24 17:02:26,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 17:02:26,369 INFO L432 AbstractCegarLoop]: Abstraction has 275 states and 307 transitions. [2018-01-24 17:02:26,369 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-24 17:02:26,369 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 307 transitions. [2018-01-24 17:02:26,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-01-24 17:02:26,370 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 17:02:26,370 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] [2018-01-24 17:02:26,371 INFO L371 AbstractCegarLoop]: === Iteration 9 === [mainErr51RequiresViolation, mainErr69RequiresViolation, mainErr26RequiresViolation, mainErr54RequiresViolation, mainErr66RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr82RequiresViolation, mainErr74RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr89RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr58RequiresViolation, mainErr62RequiresViolation, mainErr15RequiresViolation, mainErr49RequiresViolation, mainErr12RequiresViolation, mainErr71RequiresViolation, mainErr6RequiresViolation, mainErr85RequiresViolation, mainErr35RequiresViolation, mainErr55RequiresViolation, mainErr65RequiresViolation, mainErr70RequiresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr78RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr57RequiresViolation, mainErr63RequiresViolation, mainErr77RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr76RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr50RequiresViolation, mainErr37RequiresViolation, mainErr83RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr84RequiresViolation, mainErr61RequiresViolation, mainErr59RequiresViolation, mainErr28RequiresViolation, mainErr87RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr56RequiresViolation, mainErr79RequiresViolation, mainErr64RequiresViolation, mainErr48RequiresViolation, mainErr72RequiresViolation, mainErr39RequiresViolation, mainErr81RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr90EnsuresViolation, mainErr2RequiresViolation, mainErr52RequiresViolation, mainErr68RequiresViolation, mainErr45RequiresViolation, mainErr75RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr88RequiresViolation, mainErr1RequiresViolation, mainErr60RequiresViolation, mainErr9RequiresViolation, mainErr80RequiresViolation, mainErr67RequiresViolation, mainErr53RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr86RequiresViolation, mainErr47RequiresViolation, mainErr73RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 17:02:26,371 INFO L82 PathProgramCache]: Analyzing trace with hash -1728935830, now seen corresponding path program 1 times [2018-01-24 17:02:26,371 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 17:02:26,372 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 17:02:26,372 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 17:02:26,372 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 17:02:26,372 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 17:02:26,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 17:02:26,386 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 17:02:26,445 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 17:02:26,445 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 17:02:26,445 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-01-24 17:02:26,445 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 17:02:26,446 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-24 17:02:26,446 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-24 17:02:26,446 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-01-24 17:02:26,446 INFO L87 Difference]: Start difference. First operand 275 states and 307 transitions. Second operand 5 states. [2018-01-24 17:02:26,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 17:02:26,797 INFO L93 Difference]: Finished difference Result 460 states and 514 transitions. [2018-01-24 17:02:26,797 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-01-24 17:02:26,797 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 28 [2018-01-24 17:02:26,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 17:02:26,799 INFO L225 Difference]: With dead ends: 460 [2018-01-24 17:02:26,799 INFO L226 Difference]: Without dead ends: 457 [2018-01-24 17:02:26,799 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2018-01-24 17:02:26,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2018-01-24 17:02:26,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 276. [2018-01-24 17:02:26,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 276 states. [2018-01-24 17:02:26,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 310 transitions. [2018-01-24 17:02:26,806 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 310 transitions. Word has length 28 [2018-01-24 17:02:26,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 17:02:26,807 INFO L432 AbstractCegarLoop]: Abstraction has 276 states and 310 transitions. [2018-01-24 17:02:26,807 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-24 17:02:26,807 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 310 transitions. [2018-01-24 17:02:26,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-01-24 17:02:26,808 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 17:02:26,808 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] [2018-01-24 17:02:26,808 INFO L371 AbstractCegarLoop]: === Iteration 10 === [mainErr51RequiresViolation, mainErr69RequiresViolation, mainErr26RequiresViolation, mainErr54RequiresViolation, mainErr66RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr82RequiresViolation, mainErr74RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr89RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr58RequiresViolation, mainErr62RequiresViolation, mainErr15RequiresViolation, mainErr49RequiresViolation, mainErr12RequiresViolation, mainErr71RequiresViolation, mainErr6RequiresViolation, mainErr85RequiresViolation, mainErr35RequiresViolation, mainErr55RequiresViolation, mainErr65RequiresViolation, mainErr70RequiresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr78RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr57RequiresViolation, mainErr63RequiresViolation, mainErr77RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr76RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr50RequiresViolation, mainErr37RequiresViolation, mainErr83RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr84RequiresViolation, mainErr61RequiresViolation, mainErr59RequiresViolation, mainErr28RequiresViolation, mainErr87RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr56RequiresViolation, mainErr79RequiresViolation, mainErr64RequiresViolation, mainErr48RequiresViolation, mainErr72RequiresViolation, mainErr39RequiresViolation, mainErr81RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr90EnsuresViolation, mainErr2RequiresViolation, mainErr52RequiresViolation, mainErr68RequiresViolation, mainErr45RequiresViolation, mainErr75RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr88RequiresViolation, mainErr1RequiresViolation, mainErr60RequiresViolation, mainErr9RequiresViolation, mainErr80RequiresViolation, mainErr67RequiresViolation, mainErr53RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr86RequiresViolation, mainErr47RequiresViolation, mainErr73RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 17:02:26,808 INFO L82 PathProgramCache]: Analyzing trace with hash -1728935829, now seen corresponding path program 1 times [2018-01-24 17:02:26,808 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 17:02:26,809 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 17:02:26,809 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 17:02:26,809 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 17:02:26,809 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 17:02:26,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 17:02:26,820 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 17:02:26,910 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 17:02:26,910 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 17:02:26,910 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-24 17:02:26,910 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 17:02:26,911 INFO L409 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-01-24 17:02:26,911 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-01-24 17:02:26,911 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-01-24 17:02:26,911 INFO L87 Difference]: Start difference. First operand 276 states and 310 transitions. Second operand 6 states. [2018-01-24 17:02:27,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 17:02:27,250 INFO L93 Difference]: Finished difference Result 388 states and 438 transitions. [2018-01-24 17:02:27,250 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-01-24 17:02:27,250 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 28 [2018-01-24 17:02:27,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 17:02:27,252 INFO L225 Difference]: With dead ends: 388 [2018-01-24 17:02:27,252 INFO L226 Difference]: Without dead ends: 387 [2018-01-24 17:02:27,252 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2018-01-24 17:02:27,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2018-01-24 17:02:27,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 275. [2018-01-24 17:02:27,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 275 states. [2018-01-24 17:02:27,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 309 transitions. [2018-01-24 17:02:27,260 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 309 transitions. Word has length 28 [2018-01-24 17:02:27,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 17:02:27,260 INFO L432 AbstractCegarLoop]: Abstraction has 275 states and 309 transitions. [2018-01-24 17:02:27,260 INFO L433 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-01-24 17:02:27,260 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 309 transitions. [2018-01-24 17:02:27,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-01-24 17:02:27,262 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 17:02:27,262 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] [2018-01-24 17:02:27,262 INFO L371 AbstractCegarLoop]: === Iteration 11 === [mainErr51RequiresViolation, mainErr69RequiresViolation, mainErr26RequiresViolation, mainErr54RequiresViolation, mainErr66RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr82RequiresViolation, mainErr74RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr89RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr58RequiresViolation, mainErr62RequiresViolation, mainErr15RequiresViolation, mainErr49RequiresViolation, mainErr12RequiresViolation, mainErr71RequiresViolation, mainErr6RequiresViolation, mainErr85RequiresViolation, mainErr35RequiresViolation, mainErr55RequiresViolation, mainErr65RequiresViolation, mainErr70RequiresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr78RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr57RequiresViolation, mainErr63RequiresViolation, mainErr77RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr76RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr50RequiresViolation, mainErr37RequiresViolation, mainErr83RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr84RequiresViolation, mainErr61RequiresViolation, mainErr59RequiresViolation, mainErr28RequiresViolation, mainErr87RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr56RequiresViolation, mainErr79RequiresViolation, mainErr64RequiresViolation, mainErr48RequiresViolation, mainErr72RequiresViolation, mainErr39RequiresViolation, mainErr81RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr90EnsuresViolation, mainErr2RequiresViolation, mainErr52RequiresViolation, mainErr68RequiresViolation, mainErr45RequiresViolation, mainErr75RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr88RequiresViolation, mainErr1RequiresViolation, mainErr60RequiresViolation, mainErr9RequiresViolation, mainErr80RequiresViolation, mainErr67RequiresViolation, mainErr53RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr86RequiresViolation, mainErr47RequiresViolation, mainErr73RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 17:02:27,262 INFO L82 PathProgramCache]: Analyzing trace with hash -887445228, now seen corresponding path program 1 times [2018-01-24 17:02:27,262 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 17:02:27,263 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 17:02:27,263 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 17:02:27,263 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 17:02:27,264 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 17:02:27,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 17:02:27,271 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 17:02:27,287 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 17:02:27,288 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 17:02:27,288 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-24 17:02:27,288 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 17:02:27,288 INFO L409 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-01-24 17:02:27,288 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-01-24 17:02:27,289 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-01-24 17:02:27,289 INFO L87 Difference]: Start difference. First operand 275 states and 309 transitions. Second operand 3 states. [2018-01-24 17:02:27,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 17:02:27,373 INFO L93 Difference]: Finished difference Result 279 states and 312 transitions. [2018-01-24 17:02:27,373 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-01-24 17:02:27,373 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 30 [2018-01-24 17:02:27,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 17:02:27,375 INFO L225 Difference]: With dead ends: 279 [2018-01-24 17:02:27,375 INFO L226 Difference]: Without dead ends: 255 [2018-01-24 17:02:27,375 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-01-24 17:02:27,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2018-01-24 17:02:27,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 254. [2018-01-24 17:02:27,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 254 states. [2018-01-24 17:02:27,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 285 transitions. [2018-01-24 17:02:27,384 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 285 transitions. Word has length 30 [2018-01-24 17:02:27,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 17:02:27,384 INFO L432 AbstractCegarLoop]: Abstraction has 254 states and 285 transitions. [2018-01-24 17:02:27,384 INFO L433 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-01-24 17:02:27,385 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 285 transitions. [2018-01-24 17:02:27,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-01-24 17:02:27,385 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 17:02:27,386 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] [2018-01-24 17:02:27,386 INFO L371 AbstractCegarLoop]: === Iteration 12 === [mainErr51RequiresViolation, mainErr69RequiresViolation, mainErr26RequiresViolation, mainErr54RequiresViolation, mainErr66RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr82RequiresViolation, mainErr74RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr89RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr58RequiresViolation, mainErr62RequiresViolation, mainErr15RequiresViolation, mainErr49RequiresViolation, mainErr12RequiresViolation, mainErr71RequiresViolation, mainErr6RequiresViolation, mainErr85RequiresViolation, mainErr35RequiresViolation, mainErr55RequiresViolation, mainErr65RequiresViolation, mainErr70RequiresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr78RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr57RequiresViolation, mainErr63RequiresViolation, mainErr77RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr76RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr50RequiresViolation, mainErr37RequiresViolation, mainErr83RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr84RequiresViolation, mainErr61RequiresViolation, mainErr59RequiresViolation, mainErr28RequiresViolation, mainErr87RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr56RequiresViolation, mainErr79RequiresViolation, mainErr64RequiresViolation, mainErr48RequiresViolation, mainErr72RequiresViolation, mainErr39RequiresViolation, mainErr81RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr90EnsuresViolation, mainErr2RequiresViolation, mainErr52RequiresViolation, mainErr68RequiresViolation, mainErr45RequiresViolation, mainErr75RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr88RequiresViolation, mainErr1RequiresViolation, mainErr60RequiresViolation, mainErr9RequiresViolation, mainErr80RequiresViolation, mainErr67RequiresViolation, mainErr53RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr86RequiresViolation, mainErr47RequiresViolation, mainErr73RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 17:02:27,386 INFO L82 PathProgramCache]: Analyzing trace with hash 1380917583, now seen corresponding path program 1 times [2018-01-24 17:02:27,386 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 17:02:27,387 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 17:02:27,387 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 17:02:27,387 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 17:02:27,387 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 17:02:27,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 17:02:27,408 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 17:02:27,588 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 17:02:27,588 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 17:02:27,588 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2018-01-24 17:02:27,588 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 17:02:27,588 INFO L409 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-01-24 17:02:27,589 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-01-24 17:02:27,589 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2018-01-24 17:02:27,589 INFO L87 Difference]: Start difference. First operand 254 states and 285 transitions. Second operand 12 states. [2018-01-24 17:02:29,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 17:02:29,057 INFO L93 Difference]: Finished difference Result 1031 states and 1163 transitions. [2018-01-24 17:02:29,058 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-01-24 17:02:29,058 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 32 [2018-01-24 17:02:29,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 17:02:29,061 INFO L225 Difference]: With dead ends: 1031 [2018-01-24 17:02:29,061 INFO L226 Difference]: Without dead ends: 1030 [2018-01-24 17:02:29,062 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=183, Invalid=417, Unknown=0, NotChecked=0, Total=600 [2018-01-24 17:02:29,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1030 states. [2018-01-24 17:02:29,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1030 to 253. [2018-01-24 17:02:29,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 253 states. [2018-01-24 17:02:29,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 284 transitions. [2018-01-24 17:02:29,071 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 284 transitions. Word has length 32 [2018-01-24 17:02:29,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 17:02:29,071 INFO L432 AbstractCegarLoop]: Abstraction has 253 states and 284 transitions. [2018-01-24 17:02:29,071 INFO L433 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-01-24 17:02:29,071 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 284 transitions. [2018-01-24 17:02:29,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-01-24 17:02:29,072 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 17:02:29,072 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] [2018-01-24 17:02:29,072 INFO L371 AbstractCegarLoop]: === Iteration 13 === [mainErr51RequiresViolation, mainErr69RequiresViolation, mainErr26RequiresViolation, mainErr54RequiresViolation, mainErr66RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr82RequiresViolation, mainErr74RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr89RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr58RequiresViolation, mainErr62RequiresViolation, mainErr15RequiresViolation, mainErr49RequiresViolation, mainErr12RequiresViolation, mainErr71RequiresViolation, mainErr6RequiresViolation, mainErr85RequiresViolation, mainErr35RequiresViolation, mainErr55RequiresViolation, mainErr65RequiresViolation, mainErr70RequiresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr78RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr57RequiresViolation, mainErr63RequiresViolation, mainErr77RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr76RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr50RequiresViolation, mainErr37RequiresViolation, mainErr83RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr84RequiresViolation, mainErr61RequiresViolation, mainErr59RequiresViolation, mainErr28RequiresViolation, mainErr87RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr56RequiresViolation, mainErr79RequiresViolation, mainErr64RequiresViolation, mainErr48RequiresViolation, mainErr72RequiresViolation, mainErr39RequiresViolation, mainErr81RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr90EnsuresViolation, mainErr2RequiresViolation, mainErr52RequiresViolation, mainErr68RequiresViolation, mainErr45RequiresViolation, mainErr75RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr88RequiresViolation, mainErr1RequiresViolation, mainErr60RequiresViolation, mainErr9RequiresViolation, mainErr80RequiresViolation, mainErr67RequiresViolation, mainErr53RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr86RequiresViolation, mainErr47RequiresViolation, mainErr73RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 17:02:29,073 INFO L82 PathProgramCache]: Analyzing trace with hash 1380917584, now seen corresponding path program 1 times [2018-01-24 17:02:29,073 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 17:02:29,074 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 17:02:29,074 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 17:02:29,074 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 17:02:29,074 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 17:02:29,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 17:02:29,089 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 17:02:29,281 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 17:02:29,282 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 17:02:29,282 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2018-01-24 17:02:29,282 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 17:02:29,282 INFO L409 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-01-24 17:02:29,283 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-01-24 17:02:29,283 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2018-01-24 17:02:29,283 INFO L87 Difference]: Start difference. First operand 253 states and 284 transitions. Second operand 11 states. [2018-01-24 17:02:30,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 17:02:30,869 INFO L93 Difference]: Finished difference Result 1176 states and 1332 transitions. [2018-01-24 17:02:30,869 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-01-24 17:02:30,869 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 32 [2018-01-24 17:02:30,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 17:02:30,873 INFO L225 Difference]: With dead ends: 1176 [2018-01-24 17:02:30,873 INFO L226 Difference]: Without dead ends: 1175 [2018-01-24 17:02:30,874 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=258, Invalid=672, Unknown=0, NotChecked=0, Total=930 [2018-01-24 17:02:30,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1175 states. [2018-01-24 17:02:30,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1175 to 252. [2018-01-24 17:02:30,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 252 states. [2018-01-24 17:02:30,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 283 transitions. [2018-01-24 17:02:30,884 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 283 transitions. Word has length 32 [2018-01-24 17:02:30,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 17:02:30,884 INFO L432 AbstractCegarLoop]: Abstraction has 252 states and 283 transitions. [2018-01-24 17:02:30,884 INFO L433 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-01-24 17:02:30,884 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 283 transitions. [2018-01-24 17:02:30,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-01-24 17:02:30,885 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 17:02:30,885 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] [2018-01-24 17:02:30,885 INFO L371 AbstractCegarLoop]: === Iteration 14 === [mainErr51RequiresViolation, mainErr69RequiresViolation, mainErr26RequiresViolation, mainErr54RequiresViolation, mainErr66RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr82RequiresViolation, mainErr74RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr89RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr58RequiresViolation, mainErr62RequiresViolation, mainErr15RequiresViolation, mainErr49RequiresViolation, mainErr12RequiresViolation, mainErr71RequiresViolation, mainErr6RequiresViolation, mainErr85RequiresViolation, mainErr35RequiresViolation, mainErr55RequiresViolation, mainErr65RequiresViolation, mainErr70RequiresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr78RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr57RequiresViolation, mainErr63RequiresViolation, mainErr77RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr76RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr50RequiresViolation, mainErr37RequiresViolation, mainErr83RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr84RequiresViolation, mainErr61RequiresViolation, mainErr59RequiresViolation, mainErr28RequiresViolation, mainErr87RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr56RequiresViolation, mainErr79RequiresViolation, mainErr64RequiresViolation, mainErr48RequiresViolation, mainErr72RequiresViolation, mainErr39RequiresViolation, mainErr81RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr90EnsuresViolation, mainErr2RequiresViolation, mainErr52RequiresViolation, mainErr68RequiresViolation, mainErr45RequiresViolation, mainErr75RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr88RequiresViolation, mainErr1RequiresViolation, mainErr60RequiresViolation, mainErr9RequiresViolation, mainErr80RequiresViolation, mainErr67RequiresViolation, mainErr53RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr86RequiresViolation, mainErr47RequiresViolation, mainErr73RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 17:02:30,885 INFO L82 PathProgramCache]: Analyzing trace with hash 1718989974, now seen corresponding path program 1 times [2018-01-24 17:02:30,885 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 17:02:30,886 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 17:02:30,886 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 17:02:30,886 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 17:02:30,887 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 17:02:30,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 17:02:30,898 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 17:02:30,930 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-01-24 17:02:30,931 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 17:02:30,931 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-24 17:02:30,931 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 17:02:30,931 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-24 17:02:30,931 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-24 17:02:30,932 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-24 17:02:30,932 INFO L87 Difference]: Start difference. First operand 252 states and 283 transitions. Second operand 4 states. [2018-01-24 17:02:31,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 17:02:31,448 INFO L93 Difference]: Finished difference Result 777 states and 874 transitions. [2018-01-24 17:02:31,448 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-24 17:02:31,448 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 35 [2018-01-24 17:02:31,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 17:02:31,451 INFO L225 Difference]: With dead ends: 777 [2018-01-24 17:02:31,451 INFO L226 Difference]: Without dead ends: 775 [2018-01-24 17:02:31,451 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-01-24 17:02:31,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 775 states. [2018-01-24 17:02:31,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 775 to 250. [2018-01-24 17:02:31,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 250 states. [2018-01-24 17:02:31,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 281 transitions. [2018-01-24 17:02:31,463 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 281 transitions. Word has length 35 [2018-01-24 17:02:31,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 17:02:31,463 INFO L432 AbstractCegarLoop]: Abstraction has 250 states and 281 transitions. [2018-01-24 17:02:31,463 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-24 17:02:31,463 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 281 transitions. [2018-01-24 17:02:31,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-01-24 17:02:31,464 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 17:02:31,464 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] [2018-01-24 17:02:31,464 INFO L371 AbstractCegarLoop]: === Iteration 15 === [mainErr51RequiresViolation, mainErr69RequiresViolation, mainErr26RequiresViolation, mainErr54RequiresViolation, mainErr66RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr82RequiresViolation, mainErr74RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr89RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr58RequiresViolation, mainErr62RequiresViolation, mainErr15RequiresViolation, mainErr49RequiresViolation, mainErr12RequiresViolation, mainErr71RequiresViolation, mainErr6RequiresViolation, mainErr85RequiresViolation, mainErr35RequiresViolation, mainErr55RequiresViolation, mainErr65RequiresViolation, mainErr70RequiresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr78RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr57RequiresViolation, mainErr63RequiresViolation, mainErr77RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr76RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr50RequiresViolation, mainErr37RequiresViolation, mainErr83RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr84RequiresViolation, mainErr61RequiresViolation, mainErr59RequiresViolation, mainErr28RequiresViolation, mainErr87RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr56RequiresViolation, mainErr79RequiresViolation, mainErr64RequiresViolation, mainErr48RequiresViolation, mainErr72RequiresViolation, mainErr39RequiresViolation, mainErr81RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr90EnsuresViolation, mainErr2RequiresViolation, mainErr52RequiresViolation, mainErr68RequiresViolation, mainErr45RequiresViolation, mainErr75RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr88RequiresViolation, mainErr1RequiresViolation, mainErr60RequiresViolation, mainErr9RequiresViolation, mainErr80RequiresViolation, mainErr67RequiresViolation, mainErr53RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr86RequiresViolation, mainErr47RequiresViolation, mainErr73RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 17:02:31,465 INFO L82 PathProgramCache]: Analyzing trace with hash 1718989975, now seen corresponding path program 1 times [2018-01-24 17:02:31,465 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 17:02:31,465 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 17:02:31,466 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 17:02:31,466 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 17:02:31,466 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 17:02:31,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 17:02:31,478 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 17:02:31,553 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 17:02:31,553 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 17:02:31,553 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-24 17:02:31,553 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 17:02:31,554 INFO L409 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-01-24 17:02:31,554 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-01-24 17:02:31,554 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-01-24 17:02:31,554 INFO L87 Difference]: Start difference. First operand 250 states and 281 transitions. Second operand 6 states. [2018-01-24 17:02:31,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 17:02:31,915 INFO L93 Difference]: Finished difference Result 476 states and 543 transitions. [2018-01-24 17:02:31,915 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-01-24 17:02:31,915 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 35 [2018-01-24 17:02:31,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 17:02:31,916 INFO L225 Difference]: With dead ends: 476 [2018-01-24 17:02:31,916 INFO L226 Difference]: Without dead ends: 474 [2018-01-24 17:02:31,917 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2018-01-24 17:02:31,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2018-01-24 17:02:31,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 256. [2018-01-24 17:02:31,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2018-01-24 17:02:31,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 292 transitions. [2018-01-24 17:02:31,926 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 292 transitions. Word has length 35 [2018-01-24 17:02:31,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 17:02:31,927 INFO L432 AbstractCegarLoop]: Abstraction has 256 states and 292 transitions. [2018-01-24 17:02:31,927 INFO L433 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-01-24 17:02:31,927 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 292 transitions. [2018-01-24 17:02:31,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-01-24 17:02:31,928 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 17:02:31,928 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] [2018-01-24 17:02:31,928 INFO L371 AbstractCegarLoop]: === Iteration 16 === [mainErr51RequiresViolation, mainErr69RequiresViolation, mainErr26RequiresViolation, mainErr54RequiresViolation, mainErr66RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr82RequiresViolation, mainErr74RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr89RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr58RequiresViolation, mainErr62RequiresViolation, mainErr15RequiresViolation, mainErr49RequiresViolation, mainErr12RequiresViolation, mainErr71RequiresViolation, mainErr6RequiresViolation, mainErr85RequiresViolation, mainErr35RequiresViolation, mainErr55RequiresViolation, mainErr65RequiresViolation, mainErr70RequiresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr78RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr57RequiresViolation, mainErr63RequiresViolation, mainErr77RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr76RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr50RequiresViolation, mainErr37RequiresViolation, mainErr83RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr84RequiresViolation, mainErr61RequiresViolation, mainErr59RequiresViolation, mainErr28RequiresViolation, mainErr87RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr56RequiresViolation, mainErr79RequiresViolation, mainErr64RequiresViolation, mainErr48RequiresViolation, mainErr72RequiresViolation, mainErr39RequiresViolation, mainErr81RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr90EnsuresViolation, mainErr2RequiresViolation, mainErr52RequiresViolation, mainErr68RequiresViolation, mainErr45RequiresViolation, mainErr75RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr88RequiresViolation, mainErr1RequiresViolation, mainErr60RequiresViolation, mainErr9RequiresViolation, mainErr80RequiresViolation, mainErr67RequiresViolation, mainErr53RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr86RequiresViolation, mainErr47RequiresViolation, mainErr73RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 17:02:31,928 INFO L82 PathProgramCache]: Analyzing trace with hash 320441296, now seen corresponding path program 1 times [2018-01-24 17:02:31,928 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 17:02:31,929 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 17:02:31,929 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 17:02:31,929 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 17:02:31,929 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 17:02:31,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 17:02:31,940 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 17:02:32,012 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 17:02:32,012 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 17:02:32,013 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-01-24 17:02:32,013 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 17:02:32,013 INFO L409 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-01-24 17:02:32,013 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-01-24 17:02:32,013 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-01-24 17:02:32,013 INFO L87 Difference]: Start difference. First operand 256 states and 292 transitions. Second operand 6 states. [2018-01-24 17:02:32,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 17:02:32,097 INFO L93 Difference]: Finished difference Result 641 states and 718 transitions. [2018-01-24 17:02:32,097 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-01-24 17:02:32,097 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 36 [2018-01-24 17:02:32,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 17:02:32,098 INFO L225 Difference]: With dead ends: 641 [2018-01-24 17:02:32,098 INFO L226 Difference]: Without dead ends: 453 [2018-01-24 17:02:32,099 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2018-01-24 17:02:32,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2018-01-24 17:02:32,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 254. [2018-01-24 17:02:32,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 254 states. [2018-01-24 17:02:32,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 287 transitions. [2018-01-24 17:02:32,106 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 287 transitions. Word has length 36 [2018-01-24 17:02:32,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 17:02:32,106 INFO L432 AbstractCegarLoop]: Abstraction has 254 states and 287 transitions. [2018-01-24 17:02:32,107 INFO L433 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-01-24 17:02:32,107 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 287 transitions. [2018-01-24 17:02:32,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-01-24 17:02:32,107 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 17:02:32,107 INFO L322 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 17:02:32,108 INFO L371 AbstractCegarLoop]: === Iteration 17 === [mainErr51RequiresViolation, mainErr69RequiresViolation, mainErr26RequiresViolation, mainErr54RequiresViolation, mainErr66RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr82RequiresViolation, mainErr74RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr89RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr58RequiresViolation, mainErr62RequiresViolation, mainErr15RequiresViolation, mainErr49RequiresViolation, mainErr12RequiresViolation, mainErr71RequiresViolation, mainErr6RequiresViolation, mainErr85RequiresViolation, mainErr35RequiresViolation, mainErr55RequiresViolation, mainErr65RequiresViolation, mainErr70RequiresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr78RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr57RequiresViolation, mainErr63RequiresViolation, mainErr77RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr76RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr50RequiresViolation, mainErr37RequiresViolation, mainErr83RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr84RequiresViolation, mainErr61RequiresViolation, mainErr59RequiresViolation, mainErr28RequiresViolation, mainErr87RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr56RequiresViolation, mainErr79RequiresViolation, mainErr64RequiresViolation, mainErr48RequiresViolation, mainErr72RequiresViolation, mainErr39RequiresViolation, mainErr81RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr90EnsuresViolation, mainErr2RequiresViolation, mainErr52RequiresViolation, mainErr68RequiresViolation, mainErr45RequiresViolation, mainErr75RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr88RequiresViolation, mainErr1RequiresViolation, mainErr60RequiresViolation, mainErr9RequiresViolation, mainErr80RequiresViolation, mainErr67RequiresViolation, mainErr53RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr86RequiresViolation, mainErr47RequiresViolation, mainErr73RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 17:02:32,108 INFO L82 PathProgramCache]: Analyzing trace with hash 1534000121, now seen corresponding path program 1 times [2018-01-24 17:02:32,108 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 17:02:32,109 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 17:02:32,109 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 17:02:32,109 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 17:02:32,109 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 17:02:32,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 17:02:32,123 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 17:02:32,556 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 17:02:32,556 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 17:02:32,556 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2018-01-24 17:02:32,556 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 17:02:32,557 INFO L409 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-01-24 17:02:32,557 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-01-24 17:02:32,557 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2018-01-24 17:02:32,557 INFO L87 Difference]: Start difference. First operand 254 states and 287 transitions. Second operand 16 states. [2018-01-24 17:02:34,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 17:02:34,601 INFO L93 Difference]: Finished difference Result 896 states and 1011 transitions. [2018-01-24 17:02:34,602 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-01-24 17:02:34,602 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 38 [2018-01-24 17:02:34,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 17:02:34,605 INFO L225 Difference]: With dead ends: 896 [2018-01-24 17:02:34,605 INFO L226 Difference]: Without dead ends: 685 [2018-01-24 17:02:34,606 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=401, Invalid=1159, Unknown=0, NotChecked=0, Total=1560 [2018-01-24 17:02:34,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 685 states. [2018-01-24 17:02:34,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 685 to 247. [2018-01-24 17:02:34,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 247 states. [2018-01-24 17:02:34,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 275 transitions. [2018-01-24 17:02:34,617 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 275 transitions. Word has length 38 [2018-01-24 17:02:34,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 17:02:34,617 INFO L432 AbstractCegarLoop]: Abstraction has 247 states and 275 transitions. [2018-01-24 17:02:34,617 INFO L433 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-01-24 17:02:34,617 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 275 transitions. [2018-01-24 17:02:34,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-01-24 17:02:34,618 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 17:02:34,618 INFO L322 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 17:02:34,618 INFO L371 AbstractCegarLoop]: === Iteration 18 === [mainErr51RequiresViolation, mainErr69RequiresViolation, mainErr26RequiresViolation, mainErr54RequiresViolation, mainErr66RequiresViolation, mainErr18RequiresViolation, mainErr23RequiresViolation, mainErr38RequiresViolation, mainErr0RequiresViolation, mainErr82RequiresViolation, mainErr74RequiresViolation, mainErr31RequiresViolation, mainErr46RequiresViolation, mainErr89RequiresViolation, mainErr29RequiresViolation, mainErr3RequiresViolation, mainErr58RequiresViolation, mainErr62RequiresViolation, mainErr15RequiresViolation, mainErr49RequiresViolation, mainErr12RequiresViolation, mainErr71RequiresViolation, mainErr6RequiresViolation, mainErr85RequiresViolation, mainErr35RequiresViolation, mainErr55RequiresViolation, mainErr65RequiresViolation, mainErr70RequiresViolation, mainErr17RequiresViolation, mainErr42RequiresViolation, mainErr78RequiresViolation, mainErr30RequiresViolation, mainErr11RequiresViolation, mainErr57RequiresViolation, mainErr63RequiresViolation, mainErr77RequiresViolation, mainErr24RequiresViolation, mainErr44RequiresViolation, mainErr76RequiresViolation, mainErr10RequiresViolation, mainErr43RequiresViolation, mainErr4RequiresViolation, mainErr50RequiresViolation, mainErr37RequiresViolation, mainErr83RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr36RequiresViolation, mainErr84RequiresViolation, mainErr61RequiresViolation, mainErr59RequiresViolation, mainErr28RequiresViolation, mainErr87RequiresViolation, mainErr33RequiresViolation, mainErr21RequiresViolation, mainErr41RequiresViolation, mainErr56RequiresViolation, mainErr79RequiresViolation, mainErr64RequiresViolation, mainErr48RequiresViolation, mainErr72RequiresViolation, mainErr39RequiresViolation, mainErr81RequiresViolation, mainErr16RequiresViolation, mainErr25RequiresViolation, mainErr90EnsuresViolation, mainErr2RequiresViolation, mainErr52RequiresViolation, mainErr68RequiresViolation, mainErr45RequiresViolation, mainErr75RequiresViolation, mainErr19RequiresViolation, mainErr22RequiresViolation, mainErr32RequiresViolation, mainErr27RequiresViolation, mainErr88RequiresViolation, mainErr1RequiresViolation, mainErr60RequiresViolation, mainErr9RequiresViolation, mainErr80RequiresViolation, mainErr67RequiresViolation, mainErr53RequiresViolation, mainErr7RequiresViolation, mainErr20RequiresViolation, mainErr8RequiresViolation, mainErr34RequiresViolation, mainErr86RequiresViolation, mainErr47RequiresViolation, mainErr73RequiresViolation, mainErr14RequiresViolation, mainErr40RequiresViolation]=== [2018-01-24 17:02:34,618 INFO L82 PathProgramCache]: Analyzing trace with hash 1535290008, now seen corresponding path program 1 times [2018-01-24 17:02:34,618 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 17:02:34,619 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 17:02:34,619 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 17:02:34,619 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 17:02:34,620 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 17:02:34,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 17:02:34,633 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 17:02:34,855 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 17:02:34,856 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-24 17:02:34,856 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-24 17:02:34,857 INFO L199 CegarAbsIntRunner]: Running AI on error trace of length 39 with the following transitions: [2018-01-24 17:02:34,858 INFO L201 CegarAbsIntRunner]: [0], [4], [6], [9], [11], [12], [13], [18], [20], [23], [24], [27], [28], [29], [34], [36], [39], [42], [46], [49], [50], [53], [57], [62], [63], [66], [71], [72], [75], [78], [80], [429], [430], [434], [435], [436] [2018-01-24 17:02:34,900 INFO L147 AbstractInterpreter]: Using domain VPDomain [2018-01-24 17:02:34,900 INFO L101 FixpointEngine]: Starting fixpoint engine with domain VPDomain (maxUnwinding=3, maxParallelStates=2) [2018-01-24 17:02:35,310 INFO L259 AbstractInterpreter]: Some error location(s) were reachable [2018-01-24 17:02:35,311 INFO L268 AbstractInterpreter]: Visited 36 different actions 85 times. Merged at 30 different actions 48 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 42 variables. [2018-01-24 17:02:35,324 INFO L434 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-01-24 17:02:35,324 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-24 17:02:35,324 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-24 17:02:35,349 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 17:02:35,349 INFO L280 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-01-24 17:02:35,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 17:02:35,394 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-24 17:02:35,716 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 10 [2018-01-24 17:02:35,722 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2018-01-24 17:02:35,722 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-01-24 17:02:35,724 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-01-24 17:02:35,766 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 10 [2018-01-24 17:02:35,768 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2018-01-24 17:02:35,769 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2018-01-24 17:02:35,770 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-01-24 17:02:35,812 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-01-24 17:02:35,813 INFO L202 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:30, output treesize:22 [2018-01-24 17:02:35,882 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2018-01-24 17:02:35,885 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2018-01-24 17:02:35,886 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-01-24 17:02:35,888 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-01-24 17:02:35,895 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2018-01-24 17:02:35,896 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2018-01-24 17:02:35,896 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2018-01-24 17:02:35,897 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-01-24 17:02:35,900 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-01-24 17:02:35,900 INFO L202 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:29, output treesize:7 [2018-01-24 17:02:35,917 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 17:02:35,917 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-24 17:02:36,068 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 17:02:36,088 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-24 17:02:36,088 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 3 with cvc4 --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with cvc4 --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-01-24 17:02:36,092 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 17:02:36,092 INFO L280 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-01-24 17:02:36,177 WARN L195 Executor]: External (cvc4 --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000) stderr output: CVC4 suffered a segfault. Offending address is 0x11924190 [2018-01-24 17:02:36,178 FATAL L292 ToolchainWalker]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (cvc4 --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000)Received EOF on stdin. stderr output: CVC4 suffered a segfault. Offending address is 0x11924190 at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.TraceCheck.(TraceCheck.java:231) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.InterpolatingTraceCheck.(InterpolatingTraceCheck.java:93) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:132) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceCheckConstructor.constructForwardBackward(TraceCheckConstructor.java:237) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceCheckConstructor.get(TraceCheckConstructor.java:185) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.BaseTaipanRefinementStrategy.getTraceCheck(BaseTaipanRefinementStrategy.java:213) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.BaseRefinementStrategy.checkFeasibility(BaseRefinementStrategy.java:231) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.BaseRefinementStrategy.executeStrategy(BaseRefinementStrategy.java:205) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:368) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:381) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:316) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterate(TraceAbstractionStarter.java:294) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:149) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:113) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:117) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:324) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.runToolchainDefault(DefaultToolchainJob.java:221) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.BasicToolchainJob.run(BasicToolchainJob.java:134) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) Caused by: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (cvc4 --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000)Received EOF on stdin. stderr output: CVC4 suffered a segfault. Offending address is 0x11924190 at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:209) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parseCheckSatResult(Executor.java:226) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.checkSat(Scriptor.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.AnnotateAndAsserter.buildAnnotatedSsaAndAssertTerms(AnnotateAndAsserter.java:130) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.TraceCheck.checkTrace(TraceCheck.java:288) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.TraceCheck.(TraceCheck.java:207) ... 26 more Caused by: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: EOF at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1369) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser.do_action(Parser.java:582) at com.github.jhoenicke.javacup.runtime.LRParser.parse(LRParser.java:419) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:206) ... 31 more [2018-01-24 17:02:36,181 INFO L168 Benchmark]: Toolchain (without parser) took 13535.74 ms. Allocated memory was 297.8 MB in the beginning and 628.6 MB in the end (delta: 330.8 MB). Free memory was 257.8 MB in the beginning and 459.3 MB in the end (delta: -201.5 MB). Peak memory consumption was 129.3 MB. Max. memory is 5.3 GB. [2018-01-24 17:02:36,182 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 297.8 MB. Free memory is still 263.8 MB. There was no memory consumed. Max. memory is 5.3 GB. [2018-01-24 17:02:36,182 INFO L168 Benchmark]: CACSL2BoogieTranslator took 235.30 ms. Allocated memory is still 297.8 MB. Free memory was 256.8 MB in the beginning and 244.8 MB in the end (delta: 12.1 MB). Peak memory consumption was 12.1 MB. Max. memory is 5.3 GB. [2018-01-24 17:02:36,182 INFO L168 Benchmark]: Boogie Preprocessor took 46.56 ms. Allocated memory is still 297.8 MB. Free memory was 244.8 MB in the beginning and 241.8 MB in the end (delta: 3.0 MB). Peak memory consumption was 3.0 MB. Max. memory is 5.3 GB. [2018-01-24 17:02:36,182 INFO L168 Benchmark]: RCFGBuilder took 770.16 ms. Allocated memory is still 297.8 MB. Free memory was 241.8 MB in the beginning and 183.7 MB in the end (delta: 58.1 MB). Peak memory consumption was 58.1 MB. Max. memory is 5.3 GB. [2018-01-24 17:02:36,182 INFO L168 Benchmark]: TraceAbstraction took 12474.77 ms. Allocated memory was 297.8 MB in the beginning and 628.6 MB in the end (delta: 330.8 MB). Free memory was 183.7 MB in the beginning and 459.3 MB in the end (delta: -275.6 MB). Peak memory consumption was 55.2 MB. Max. memory is 5.3 GB. [2018-01-24 17:02:36,183 INFO L344 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 297.8 MB. Free memory is still 263.8 MB. There was no memory consumed. Max. memory is 5.3 GB. * CACSL2BoogieTranslator took 235.30 ms. Allocated memory is still 297.8 MB. Free memory was 256.8 MB in the beginning and 244.8 MB in the end (delta: 12.1 MB). Peak memory consumption was 12.1 MB. Max. memory is 5.3 GB. * Boogie Preprocessor took 46.56 ms. Allocated memory is still 297.8 MB. Free memory was 244.8 MB in the beginning and 241.8 MB in the end (delta: 3.0 MB). Peak memory consumption was 3.0 MB. Max. memory is 5.3 GB. * RCFGBuilder took 770.16 ms. Allocated memory is still 297.8 MB. Free memory was 241.8 MB in the beginning and 183.7 MB in the end (delta: 58.1 MB). Peak memory consumption was 58.1 MB. Max. memory is 5.3 GB. * TraceAbstraction took 12474.77 ms. Allocated memory was 297.8 MB in the beginning and 628.6 MB in the end (delta: 330.8 MB). Free memory was 183.7 MB in the beginning and 459.3 MB in the end (delta: -275.6 MB). Peak memory consumption was 55.2 MB. Max. memory is 5.3 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: - StatisticsResult: ArrayEqualityDomainStatistics #Locations : 35 LocStat_MAX_WEQGRAPH_SIZE : 0 LocStat_MAX_SIZEOF_WEQEDGELABEL : 0 LocStat_NO_SUPPORTING_EQUALITIES : 349 LocStat_NO_SUPPORTING_DISEQUALITIES : 52 LocStat_NO_DISJUNCTIONS : -70 LocStat_MAX_NO_DISJUNCTIONS : -1 #Transitions : 40 TransStat_MAX_WEQGRAPH_SIZE : 0 TransStat_MAX_SIZEOF_WEQEDGELABEL : 0 TransStat_NO_SUPPORTING_EQUALITIES : 72 TransStat_NO_SUPPORTING_DISEQUALITIES : 20 TransStat_NO_DISJUNCTIONS : 45 TransStat_MAX_NO_DISJUNCTIONS : 2 - StatisticsResult: EqConstraintFactoryStatistics CONJOIN_DISJUNCTIVE(MILLISECONDS) : 0.396135 RENAME_VARIABLES(MILLISECONDS) : 0.274491 UNFREEZE(MILLISECONDS) : 0.000000 CONJOIN(MILLISECONDS) : 0.361199 PROJECTAWAY(MILLISECONDS) : 0.197439 ADD_WEAK_EQUALITY(MILLISECONDS) : 0.001163 DISJOIN(MILLISECONDS) : 1.088767 RENAME_VARIABLES_DISJUNCTIVE(MILLISECONDS) : 0.299129 ADD_EQUALITY(MILLISECONDS) : 0.013517 DISJOIN_DISJUNCTIVE(MILLISECONDS) : 0.000000 ADD_DISEQUALITY(MILLISECONDS) : 0.031533 #CONJOIN_DISJUNCTIVE : 133 #RENAME_VARIABLES : 237 #UNFREEZE : 0 #CONJOIN : 214 #PROJECTAWAY : 155 #ADD_WEAK_EQUALITY : 29 #DISJOIN : 4 #RENAME_VARIABLES_DISJUNCTIVE : 221 #ADD_EQUALITY : 87 #DISJOIN_DISJUNCTIVE : 0 #ADD_DISEQUALITY : 14 * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (cvc4 --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000)Received EOF on stdin. stderr output: CVC4 suffered a segfault. Offending address is 0x11924190 de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (cvc4 --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000)Received EOF on stdin. stderr output: CVC4 suffered a segfault. Offending address is 0x11924190 : de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.TraceCheck.(TraceCheck.java:231) RESULT: Ultimate could not prove your program: Toolchain returned no result. Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/test-0521_true-valid-memsafety.i_svcomp-DerefFreeMemtrack-32bit-Automizer_Taipan+AI_EQ_imprecise.epf_AutomizerC.xml/Csv-Benchmark-0-2018-01-24_17-02-36-190.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/test-0521_true-valid-memsafety.i_svcomp-DerefFreeMemtrack-32bit-Automizer_Taipan+AI_EQ_imprecise.epf_AutomizerC.xml/Csv-VPDomainBenchmark-0-2018-01-24_17-02-36-190.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/test-0521_true-valid-memsafety.i_svcomp-DerefFreeMemtrack-32bit-Automizer_Taipan+AI_EQ_imprecise.epf_AutomizerC.xml/Csv-BenchmarkWithCounters-0-2018-01-24_17-02-36-190.csv Received shutdown request...