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/mempurity-32bit-Automizer_Taipan+AI_EQ.epf -i ../../../trunk/examples/svcomp/forester-heap/sll-sorted_true-unreach-call_true-valid-memsafety.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-2f49842 [2018-01-21 00:15:23,690 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-21 00:15:23,693 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-21 00:15:23,706 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-21 00:15:23,706 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-21 00:15:23,707 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-21 00:15:23,709 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-21 00:15:23,711 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-21 00:15:23,713 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-21 00:15:23,714 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-21 00:15:23,715 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-01-21 00:15:23,715 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-01-21 00:15:23,716 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-01-21 00:15:23,717 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-01-21 00:15:23,719 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-01-21 00:15:23,721 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-01-21 00:15:23,724 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-01-21 00:15:23,726 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-01-21 00:15:23,727 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-01-21 00:15:23,728 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-01-21 00:15:23,731 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-01-21 00:15:23,736 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/eq-bench/mempurity-32bit-Automizer_Taipan+AI_EQ.epf [2018-01-21 00:15:23,746 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-21 00:15:23,747 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-21 00:15:23,747 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-21 00:15:23,748 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-21 00:15:23,748 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-21 00:15:23,748 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-21 00:15:23,748 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-21 00:15:23,749 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-21 00:15:23,749 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-21 00:15:23,749 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-21 00:15:23,749 INFO L133 SettingsManager]: * Check allocation purity=true [2018-01-21 00:15:23,750 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-21 00:15:23,750 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-21 00:15:23,750 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-21 00:15:23,750 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-01-21 00:15:23,750 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-21 00:15:23,751 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-01-21 00:15:23,751 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-21 00:15:23,751 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-01-21 00:15:23,751 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-01-21 00:15:23,751 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-21 00:15:23,752 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-01-21 00:15:23,752 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-21 00:15:23,752 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-21 00:15:23,752 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-21 00:15:23,752 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-21 00:15:23,753 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-21 00:15:23,753 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-21 00:15:23,753 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-21 00:15:23,753 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-21 00:15:23,753 INFO L133 SettingsManager]: * Stop after first violation was found=false [2018-01-21 00:15:23,754 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-01-21 00:15:23,754 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-21 00:15:23,754 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-21 00:15:23,754 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-21 00:15:23,754 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-01-21 00:15:23,755 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-21 00:15:23,755 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-21 00:15:23,792 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-21 00:15:23,805 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-21 00:15:23,809 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-21 00:15:23,811 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-21 00:15:23,811 INFO L276 PluginConnector]: CDTParser initialized [2018-01-21 00:15:23,812 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/forester-heap/sll-sorted_true-unreach-call_true-valid-memsafety.i [2018-01-21 00:15:23,994 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-21 00:15:24,000 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-21 00:15:24,002 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-21 00:15:24,002 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-21 00:15:24,009 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-21 00:15:24,010 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.01 12:15:23" (1/1) ... [2018-01-21 00:15:24,013 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7c517b10 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 12:15:24, skipping insertion in model container [2018-01-21 00:15:24,014 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.01 12:15:23" (1/1) ... [2018-01-21 00:15:24,034 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-21 00:15:24,079 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-21 00:15:24,201 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-21 00:15:24,222 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-21 00:15:24,231 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 12:15:24 WrapperNode [2018-01-21 00:15:24,231 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-21 00:15:24,232 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-21 00:15:24,232 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-21 00:15:24,232 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-21 00:15:24,246 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 12:15:24" (1/1) ... [2018-01-21 00:15:24,246 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 12:15:24" (1/1) ... [2018-01-21 00:15:24,258 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 12:15:24" (1/1) ... [2018-01-21 00:15:24,259 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 12:15:24" (1/1) ... [2018-01-21 00:15:24,266 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 12:15:24" (1/1) ... [2018-01-21 00:15:24,272 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 12:15:24" (1/1) ... [2018-01-21 00:15:24,274 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 12:15:24" (1/1) ... [2018-01-21 00:15:24,276 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-21 00:15:24,277 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-21 00:15:24,277 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-21 00:15:24,277 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-21 00:15:24,278 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 12:15:24" (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 [2018-01-21 00:15:24,328 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-21 00:15:24,328 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-21 00:15:24,328 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-21 00:15:24,329 INFO L128 BoogieDeclarations]: Found specification of procedure write~int [2018-01-21 00:15:24,329 INFO L128 BoogieDeclarations]: Found specification of procedure read~int [2018-01-21 00:15:24,329 INFO L128 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2018-01-21 00:15:24,329 INFO L128 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2018-01-21 00:15:24,329 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-01-21 00:15:24,330 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-01-21 00:15:24,330 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-01-21 00:15:24,330 INFO L128 BoogieDeclarations]: Found specification of procedure malloc [2018-01-21 00:15:24,330 INFO L128 BoogieDeclarations]: Found specification of procedure free [2018-01-21 00:15:24,330 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-01-21 00:15:24,330 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2018-01-21 00:15:24,330 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-21 00:15:24,331 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-21 00:15:24,331 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-21 00:15:24,746 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-21 00:15:24,747 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.01 12:15:24 BoogieIcfgContainer [2018-01-21 00:15:24,748 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-21 00:15:24,749 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-01-21 00:15:24,749 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-01-21 00:15:24,751 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-01-21 00:15:24,752 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.01 12:15:23" (1/3) ... [2018-01-21 00:15:24,753 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3eb94120 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.01 12:15:24, skipping insertion in model container [2018-01-21 00:15:24,753 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 12:15:24" (2/3) ... [2018-01-21 00:15:24,754 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3eb94120 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.01 12:15:24, skipping insertion in model container [2018-01-21 00:15:24,754 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.01 12:15:24" (3/3) ... [2018-01-21 00:15:24,756 INFO L105 eAbstractionObserver]: Analyzing ICFG sll-sorted_true-unreach-call_true-valid-memsafety.i [2018-01-21 00:15:24,765 INFO L130 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-01-21 00:15:24,774 INFO L142 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2018-01-21 00:15:24,829 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 00:15:24,848 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 00:15:24,848 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 00:15:24,848 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 00:15:24,848 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 00:15:24,849 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 00:15:24,849 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 00:15:24,849 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.initErr0EnsuresViolation======== [2018-01-21 00:15:24,850 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 00:15:24,875 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states. [2018-01-21 00:15:24,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-01-21 00:15:24,883 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 00:15:24,885 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-01-21 00:15:24,885 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.initErr0EnsuresViolation]=== [2018-01-21 00:15:24,891 INFO L82 PathProgramCache]: Analyzing trace with hash 330448, now seen corresponding path program 1 times [2018-01-21 00:15:24,894 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 00:15:24,957 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:15:24,958 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 00:15:24,958 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:15:24,958 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 00:15:24,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 00:15:25,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 00:15:25,028 INFO L381 BasicCegarLoop]: Counterexample might be feasible [2018-01-21 00:15:25,037 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 00:15:25,047 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 00:15:25,047 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 00:15:25,048 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 00:15:25,048 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 00:15:25,048 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 00:15:25,048 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 00:15:25,048 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 00:15:25,048 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.startErr0EnsuresViolation======== [2018-01-21 00:15:25,049 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 00:15:25,053 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states. [2018-01-21 00:15:25,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-01-21 00:15:25,056 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 00:15:25,056 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 00:15:25,056 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 00:15:25,056 INFO L82 PathProgramCache]: Analyzing trace with hash 439581356, now seen corresponding path program 1 times [2018-01-21 00:15:25,056 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 00:15:25,057 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:15:25,058 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 00:15:25,058 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:15:25,058 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 00:15:25,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 00:15:25,094 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 00:15:25,220 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-21 00:15:25,222 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 00:15:25,222 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-21 00:15:25,223 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 00:15:25,227 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-21 00:15:25,242 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-21 00:15:25,243 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-21 00:15:25,246 INFO L87 Difference]: Start difference. First operand 109 states. Second operand 2 states. [2018-01-21 00:15:25,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 00:15:25,271 INFO L93 Difference]: Finished difference Result 194 states and 266 transitions. [2018-01-21 00:15:25,271 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-21 00:15:25,273 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 32 [2018-01-21 00:15:25,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 00:15:25,286 INFO L225 Difference]: With dead ends: 194 [2018-01-21 00:15:25,286 INFO L226 Difference]: Without dead ends: 106 [2018-01-21 00:15:25,290 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 [2018-01-21 00:15:25,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2018-01-21 00:15:25,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2018-01-21 00:15:25,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2018-01-21 00:15:25,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 117 transitions. [2018-01-21 00:15:25,331 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 117 transitions. Word has length 32 [2018-01-21 00:15:25,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 00:15:25,332 INFO L432 AbstractCegarLoop]: Abstraction has 106 states and 117 transitions. [2018-01-21 00:15:25,332 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-21 00:15:25,332 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 117 transitions. [2018-01-21 00:15:25,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-01-21 00:15:25,333 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 00:15:25,334 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 00:15:25,334 INFO L371 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 00:15:25,334 INFO L82 PathProgramCache]: Analyzing trace with hash 1763191735, now seen corresponding path program 1 times [2018-01-21 00:15:25,334 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 00:15:25,335 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:15:25,335 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 00:15:25,335 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:15:25,335 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 00:15:25,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 00:15:25,362 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 00:15:25,412 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-21 00:15:25,413 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 00:15:25,413 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-21 00:15:25,413 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 00:15:25,415 INFO L409 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-01-21 00:15:25,416 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-01-21 00:15:25,416 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-01-21 00:15:25,416 INFO L87 Difference]: Start difference. First operand 106 states and 117 transitions. Second operand 3 states. [2018-01-21 00:15:25,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 00:15:25,476 INFO L93 Difference]: Finished difference Result 226 states and 253 transitions. [2018-01-21 00:15:25,476 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-01-21 00:15:25,476 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 49 [2018-01-21 00:15:25,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 00:15:25,480 INFO L225 Difference]: With dead ends: 226 [2018-01-21 00:15:25,480 INFO L226 Difference]: Without dead ends: 130 [2018-01-21 00:15:25,481 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-01-21 00:15:25,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2018-01-21 00:15:25,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 117. [2018-01-21 00:15:25,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2018-01-21 00:15:25,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 129 transitions. [2018-01-21 00:15:25,490 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 129 transitions. Word has length 49 [2018-01-21 00:15:25,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 00:15:25,490 INFO L432 AbstractCegarLoop]: Abstraction has 117 states and 129 transitions. [2018-01-21 00:15:25,490 INFO L433 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-01-21 00:15:25,491 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 129 transitions. [2018-01-21 00:15:25,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-01-21 00:15:25,492 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 00:15:25,493 INFO L322 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 00:15:25,493 INFO L371 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 00:15:25,493 INFO L82 PathProgramCache]: Analyzing trace with hash 651675214, now seen corresponding path program 1 times [2018-01-21 00:15:25,493 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 00:15:25,494 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:15:25,494 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 00:15:25,494 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:15:25,494 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 00:15:25,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 00:15:25,536 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 00:15:25,677 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-01-21 00:15:25,677 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 00:15:25,677 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-21 00:15:25,678 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 00:15:25,678 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-21 00:15:25,679 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-21 00:15:25,679 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-01-21 00:15:25,679 INFO L87 Difference]: Start difference. First operand 117 states and 129 transitions. Second operand 5 states. [2018-01-21 00:15:25,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 00:15:25,856 INFO L93 Difference]: Finished difference Result 208 states and 230 transitions. [2018-01-21 00:15:25,856 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-21 00:15:25,857 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 61 [2018-01-21 00:15:25,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 00:15:25,860 INFO L225 Difference]: With dead ends: 208 [2018-01-21 00:15:25,860 INFO L226 Difference]: Without dead ends: 197 [2018-01-21 00:15:25,860 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 [2018-01-21 00:15:25,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2018-01-21 00:15:25,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 127. [2018-01-21 00:15:25,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2018-01-21 00:15:25,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 141 transitions. [2018-01-21 00:15:25,872 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 141 transitions. Word has length 61 [2018-01-21 00:15:25,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 00:15:25,873 INFO L432 AbstractCegarLoop]: Abstraction has 127 states and 141 transitions. [2018-01-21 00:15:25,873 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-21 00:15:25,873 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 141 transitions. [2018-01-21 00:15:25,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2018-01-21 00:15:25,875 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 00:15:25,875 INFO L322 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 00:15:25,875 INFO L371 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 00:15:25,876 INFO L82 PathProgramCache]: Analyzing trace with hash -1008289951, now seen corresponding path program 1 times [2018-01-21 00:15:25,876 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 00:15:25,877 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:15:25,877 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 00:15:25,877 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:15:25,877 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 00:15:25,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 00:15:25,907 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 00:15:26,014 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-01-21 00:15:26,015 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 00:15:26,015 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-01-21 00:15:26,015 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 00:15:26,016 INFO L409 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-01-21 00:15:26,016 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-01-21 00:15:26,016 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-01-21 00:15:26,016 INFO L87 Difference]: Start difference. First operand 127 states and 141 transitions. Second operand 6 states. [2018-01-21 00:15:26,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 00:15:26,279 INFO L93 Difference]: Finished difference Result 243 states and 267 transitions. [2018-01-21 00:15:26,280 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-01-21 00:15:26,281 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 79 [2018-01-21 00:15:26,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 00:15:26,283 INFO L225 Difference]: With dead ends: 243 [2018-01-21 00:15:26,284 INFO L226 Difference]: Without dead ends: 197 [2018-01-21 00:15:26,284 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2018-01-21 00:15:26,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2018-01-21 00:15:26,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 127. [2018-01-21 00:15:26,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2018-01-21 00:15:26,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 140 transitions. [2018-01-21 00:15:26,299 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 140 transitions. Word has length 79 [2018-01-21 00:15:26,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 00:15:26,300 INFO L432 AbstractCegarLoop]: Abstraction has 127 states and 140 transitions. [2018-01-21 00:15:26,300 INFO L433 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-01-21 00:15:26,300 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 140 transitions. [2018-01-21 00:15:26,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2018-01-21 00:15:26,303 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 00:15:26,304 INFO L322 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 00:15:26,304 INFO L371 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 00:15:26,304 INFO L82 PathProgramCache]: Analyzing trace with hash -159123330, now seen corresponding path program 1 times [2018-01-21 00:15:26,305 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 00:15:26,306 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:15:26,306 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 00:15:26,306 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:15:26,306 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 00:15:26,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 00:15:26,332 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 00:15:26,483 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-01-21 00:15:26,484 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 00:15:26,484 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2018-01-21 00:15:26,484 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 00:15:26,484 INFO L409 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-01-21 00:15:26,485 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-01-21 00:15:26,485 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2018-01-21 00:15:26,485 INFO L87 Difference]: Start difference. First operand 127 states and 140 transitions. Second operand 7 states. [2018-01-21 00:15:26,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 00:15:26,794 INFO L93 Difference]: Finished difference Result 222 states and 246 transitions. [2018-01-21 00:15:26,795 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-01-21 00:15:26,795 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 81 [2018-01-21 00:15:26,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 00:15:26,797 INFO L225 Difference]: With dead ends: 222 [2018-01-21 00:15:26,797 INFO L226 Difference]: Without dead ends: 148 [2018-01-21 00:15:26,798 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2018-01-21 00:15:26,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2018-01-21 00:15:26,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 133. [2018-01-21 00:15:26,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2018-01-21 00:15:26,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 147 transitions. [2018-01-21 00:15:26,810 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 147 transitions. Word has length 81 [2018-01-21 00:15:26,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 00:15:26,811 INFO L432 AbstractCegarLoop]: Abstraction has 133 states and 147 transitions. [2018-01-21 00:15:26,811 INFO L433 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-01-21 00:15:26,811 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 147 transitions. [2018-01-21 00:15:26,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2018-01-21 00:15:26,813 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 00:15:26,813 INFO L322 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 00:15:26,813 INFO L371 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 00:15:26,813 INFO L82 PathProgramCache]: Analyzing trace with hash -1056516608, now seen corresponding path program 1 times [2018-01-21 00:15:26,814 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 00:15:26,814 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:15:26,815 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 00:15:26,815 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:15:26,815 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 00:15:26,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 00:15:26,840 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 00:15:26,995 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-01-21 00:15:26,995 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 00:15:26,996 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-21 00:15:26,997 INFO L199 CegarAbsIntRunner]: Running AI on error trace of length 82 with the following transitions: [2018-01-21 00:15:26,999 INFO L201 CegarAbsIntRunner]: [0], [1], [2], [3], [4], [8], [10], [13], [15], [16], [17], [18], [19], [20], [21], [24], [30], [31], [39], [43], [48], [52], [58], [62], [64], [65], [73], [77], [106], [108], [109], [114], [118], [145], [146], [147], [148], [149], [152], [153], [161], [165], [167], [170], [171], [172], [178], [226], [230], [232], [233], [234], [238], [239], [244], [248], [256], [261], [265], [271], [272], [276], [280], [284], [286], [287], [288], [289], [293], [294], [296], [297], [302], [303], [304], [305], [306] [2018-01-21 00:15:27,070 INFO L147 AbstractInterpreter]: Using domain VPDomain [2018-01-21 00:15:27,071 INFO L101 FixpointEngine]: Starting fixpoint engine with domain VPDomain (maxUnwinding=3, maxParallelStates=2) Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown