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_mostprecise.epf -i ../../../trunk/examples/svcomp/memsafety-ext/dll_extends_pointer_true-valid-memsafety.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-2f49842 [2018-01-21 03:02:03,547 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-21 03:02:03,550 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-21 03:02:03,566 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-21 03:02:03,567 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-21 03:02:03,568 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-21 03:02:03,569 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-21 03:02:03,571 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-21 03:02:03,573 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-21 03:02:03,573 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-21 03:02:03,574 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-01-21 03:02:03,575 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-01-21 03:02:03,576 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-01-21 03:02:03,577 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-01-21 03:02:03,578 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-01-21 03:02:03,581 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-01-21 03:02:03,583 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-01-21 03:02:03,585 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-01-21 03:02:03,587 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-01-21 03:02:03,588 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-01-21 03:02:03,590 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-01-21 03:02:03,596 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-01-21 03:02:03,596 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-01-21 03:02:03,597 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_mostprecise.epf [2018-01-21 03:02:03,607 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-21 03:02:03,608 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-21 03:02:03,609 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-21 03:02:03,609 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-21 03:02:03,609 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-21 03:02:03,609 INFO L133 SettingsManager]: * Weq Fattening=true [2018-01-21 03:02:03,610 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-21 03:02:03,610 INFO L133 SettingsManager]: * Precise comparison operator=true [2018-01-21 03:02:03,610 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-21 03:02:03,611 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-21 03:02:03,611 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-21 03:02:03,611 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-21 03:02:03,611 INFO L133 SettingsManager]: * Check allocation purity=true [2018-01-21 03:02:03,612 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-21 03:02:03,612 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-21 03:02:03,612 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-21 03:02:03,612 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-01-21 03:02:03,612 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-21 03:02:03,613 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-01-21 03:02:03,613 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-21 03:02:03,613 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-01-21 03:02:03,613 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-01-21 03:02:03,613 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-21 03:02:03,614 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-01-21 03:02:03,614 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-21 03:02:03,614 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-21 03:02:03,614 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-21 03:02:03,614 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-21 03:02:03,615 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-21 03:02:03,615 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-21 03:02:03,615 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-21 03:02:03,615 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-21 03:02:03,615 INFO L133 SettingsManager]: * Stop after first violation was found=false [2018-01-21 03:02:03,616 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-01-21 03:02:03,616 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-21 03:02:03,616 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-21 03:02:03,616 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-21 03:02:03,616 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-01-21 03:02:03,617 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-21 03:02:03,618 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-21 03:02:03,653 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-21 03:02:03,667 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-21 03:02:03,671 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-21 03:02:03,673 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-21 03:02:03,674 INFO L276 PluginConnector]: CDTParser initialized [2018-01-21 03:02:03,674 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/memsafety-ext/dll_extends_pointer_true-valid-memsafety.i [2018-01-21 03:02:03,900 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-21 03:02:03,907 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-21 03:02:03,908 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-21 03:02:03,908 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-21 03:02:03,916 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-21 03:02:03,918 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.01 03:02:03" (1/1) ... [2018-01-21 03:02:03,922 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@79924daa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 03:02:03, skipping insertion in model container [2018-01-21 03:02:03,922 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.01 03:02:03" (1/1) ... [2018-01-21 03:02:03,942 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-21 03:02:04,005 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-21 03:02:04,130 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-21 03:02:04,154 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-21 03:02:04,175 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 03:02:04 WrapperNode [2018-01-21 03:02:04,175 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-21 03:02:04,176 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-21 03:02:04,176 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-21 03:02:04,176 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-21 03:02:04,188 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 03:02:04" (1/1) ... [2018-01-21 03:02:04,189 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 03:02:04" (1/1) ... [2018-01-21 03:02:04,199 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 03:02:04" (1/1) ... [2018-01-21 03:02:04,199 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 03:02:04" (1/1) ... [2018-01-21 03:02:04,204 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 03:02:04" (1/1) ... [2018-01-21 03:02:04,209 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 03:02:04" (1/1) ... [2018-01-21 03:02:04,211 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 03:02:04" (1/1) ... [2018-01-21 03:02:04,213 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-21 03:02:04,214 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-21 03:02:04,214 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-21 03:02:04,215 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-21 03:02:04,216 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 03:02:04" (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 03:02:04,283 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-21 03:02:04,283 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-21 03:02:04,283 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-21 03:02:04,283 INFO L128 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2018-01-21 03:02:04,284 INFO L128 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2018-01-21 03:02:04,284 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-01-21 03:02:04,284 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-01-21 03:02:04,284 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-01-21 03:02:04,284 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-01-21 03:02:04,284 INFO L128 BoogieDeclarations]: Found specification of procedure malloc [2018-01-21 03:02:04,285 INFO L128 BoogieDeclarations]: Found specification of procedure free [2018-01-21 03:02:04,285 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-21 03:02:04,285 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-21 03:02:04,285 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-21 03:02:04,543 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-21 03:02:04,543 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.01 03:02:04 BoogieIcfgContainer [2018-01-21 03:02:04,543 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-21 03:02:04,544 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-01-21 03:02:04,544 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-01-21 03:02:04,546 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-01-21 03:02:04,546 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.01 03:02:03" (1/3) ... [2018-01-21 03:02:04,547 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4bbd44b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.01 03:02:04, skipping insertion in model container [2018-01-21 03:02:04,548 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 03:02:04" (2/3) ... [2018-01-21 03:02:04,548 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4bbd44b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.01 03:02:04, skipping insertion in model container [2018-01-21 03:02:04,548 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.01 03:02:04" (3/3) ... [2018-01-21 03:02:04,550 INFO L105 eAbstractionObserver]: Analyzing ICFG dll_extends_pointer_true-valid-memsafety.i [2018-01-21 03:02:04,557 INFO L130 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-01-21 03:02:04,563 INFO L142 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2018-01-21 03:02:04,616 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 03:02:04,616 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 03:02:04,616 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 03:02:04,616 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 03:02:04,616 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 03:02:04,617 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 03:02:04,617 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 03:02:04,617 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.initErr0EnsuresViolation======== [2018-01-21 03:02:04,618 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 03:02:04,646 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states. [2018-01-21 03:02:04,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-01-21 03:02:04,654 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 03:02:04,655 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-01-21 03:02:04,656 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.initErr0EnsuresViolation]=== [2018-01-21 03:02:04,662 INFO L82 PathProgramCache]: Analyzing trace with hash 98024, now seen corresponding path program 1 times [2018-01-21 03:02:04,665 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 03:02:04,731 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:02:04,731 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 03:02:04,732 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:02:04,732 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 03:02:04,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 03:02:04,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 03:02:04,807 INFO L381 BasicCegarLoop]: Counterexample might be feasible [2018-01-21 03:02:04,815 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 03:02:04,824 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 03:02:04,824 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 03:02:04,824 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 03:02:04,825 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 03:02:04,825 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 03:02:04,825 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 03:02:04,825 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 03:02:04,825 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.startErr0EnsuresViolation======== [2018-01-21 03:02:04,826 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 03:02:04,828 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states. [2018-01-21 03:02:04,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-01-21 03:02:04,829 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 03:02:04,829 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 03:02:04,830 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 03:02:04,830 INFO L82 PathProgramCache]: Analyzing trace with hash -1566967016, now seen corresponding path program 1 times [2018-01-21 03:02:04,830 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 03:02:04,832 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:02:04,832 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 03:02:04,832 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:02:04,832 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 03:02:04,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 03:02:04,873 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 03:02:04,923 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 03:02:04,925 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 03:02:04,926 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-21 03:02:04,926 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 03:02:04,928 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-21 03:02:04,939 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-21 03:02:04,940 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-21 03:02:04,942 INFO L87 Difference]: Start difference. First operand 43 states. Second operand 2 states. [2018-01-21 03:02:05,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 03:02:05,040 INFO L93 Difference]: Finished difference Result 60 states and 67 transitions. [2018-01-21 03:02:05,040 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-21 03:02:05,042 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 18 [2018-01-21 03:02:05,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 03:02:05,056 INFO L225 Difference]: With dead ends: 60 [2018-01-21 03:02:05,056 INFO L226 Difference]: Without dead ends: 40 [2018-01-21 03:02:05,059 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 03:02:05,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-01-21 03:02:05,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2018-01-21 03:02:05,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-01-21 03:02:05,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2018-01-21 03:02:05,099 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 18 [2018-01-21 03:02:05,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 03:02:05,100 INFO L432 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2018-01-21 03:02:05,100 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-21 03:02:05,100 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2018-01-21 03:02:05,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-01-21 03:02:05,101 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 03:02:05,101 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] [2018-01-21 03:02:05,101 INFO L371 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 03:02:05,101 INFO L82 PathProgramCache]: Analyzing trace with hash 2022925235, now seen corresponding path program 1 times [2018-01-21 03:02:05,102 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 03:02:05,103 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:02:05,103 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 03:02:05,103 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:02:05,103 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 03:02:05,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 03:02:05,124 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 03:02:05,204 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 03:02:05,205 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 03:02:05,205 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-21 03:02:05,205 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 03:02:05,207 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-21 03:02:05,207 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-21 03:02:05,207 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-01-21 03:02:05,208 INFO L87 Difference]: Start difference. First operand 40 states and 43 transitions. Second operand 5 states. [2018-01-21 03:02:05,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 03:02:05,569 INFO L93 Difference]: Finished difference Result 73 states and 80 transitions. [2018-01-21 03:02:05,570 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-01-21 03:02:05,570 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2018-01-21 03:02:05,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 03:02:05,574 INFO L225 Difference]: With dead ends: 73 [2018-01-21 03:02:05,574 INFO L226 Difference]: Without dead ends: 68 [2018-01-21 03:02:05,575 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2018-01-21 03:02:05,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-01-21 03:02:05,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 45. [2018-01-21 03:02:05,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-01-21 03:02:05,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2018-01-21 03:02:05,583 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 21 [2018-01-21 03:02:05,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 03:02:05,584 INFO L432 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2018-01-21 03:02:05,584 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-21 03:02:05,584 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2018-01-21 03:02:05,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-01-21 03:02:05,585 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 03:02:05,585 INFO L322 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 03:02:05,585 INFO L371 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 03:02:05,586 INFO L82 PathProgramCache]: Analyzing trace with hash 745482112, now seen corresponding path program 1 times [2018-01-21 03:02:05,586 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 03:02:05,587 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:02:05,587 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 03:02:05,587 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:02:05,587 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 03:02:05,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 03:02:05,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 03:02:05,641 INFO L381 BasicCegarLoop]: Counterexample might be feasible [2018-01-21 03:02:05,648 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 03:02:05,653 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 03:02:05,653 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 03:02:05,666 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 03:02:05,667 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 03:02:05,667 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 03:02:05,667 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 03:02:05,667 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 03:02:05,667 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 03:02:05,667 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 03:02:05,667 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == mainErr0EnsuresViolation======== [2018-01-21 03:02:05,668 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 03:02:05,669 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states. [2018-01-21 03:02:05,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-01-21 03:02:05,670 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 03:02:05,670 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 03:02:05,671 INFO L371 AbstractCegarLoop]: === Iteration 1 === [mainErr0EnsuresViolation]=== [2018-01-21 03:02:05,671 INFO L82 PathProgramCache]: Analyzing trace with hash 1567082781, now seen corresponding path program 1 times [2018-01-21 03:02:05,671 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 03:02:05,672 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:02:05,672 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 03:02:05,672 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:02:05,672 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 03:02:05,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 03:02:05,684 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 03:02:05,702 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 03:02:05,702 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 03:02:05,702 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-21 03:02:05,702 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 03:02:05,703 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-21 03:02:05,703 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-21 03:02:05,703 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-21 03:02:05,703 INFO L87 Difference]: Start difference. First operand 43 states. Second operand 2 states. [2018-01-21 03:02:05,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 03:02:05,708 INFO L93 Difference]: Finished difference Result 60 states and 67 transitions. [2018-01-21 03:02:05,708 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-21 03:02:05,708 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 16 [2018-01-21 03:02:05,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 03:02:05,709 INFO L225 Difference]: With dead ends: 60 [2018-01-21 03:02:05,709 INFO L226 Difference]: Without dead ends: 38 [2018-01-21 03:02:05,710 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 03:02:05,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-01-21 03:02:05,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2018-01-21 03:02:05,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-01-21 03:02:05,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 41 transitions. [2018-01-21 03:02:05,716 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 41 transitions. Word has length 16 [2018-01-21 03:02:05,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 03:02:05,716 INFO L432 AbstractCegarLoop]: Abstraction has 38 states and 41 transitions. [2018-01-21 03:02:05,717 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-21 03:02:05,717 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2018-01-21 03:02:05,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-01-21 03:02:05,718 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 03:02:05,718 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 03:02:05,718 INFO L371 AbstractCegarLoop]: === Iteration 2 === [mainErr0EnsuresViolation]=== [2018-01-21 03:02:05,718 INFO L82 PathProgramCache]: Analyzing trace with hash 1749589112, now seen corresponding path program 1 times [2018-01-21 03:02:05,718 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 03:02:05,719 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:02:05,719 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 03:02:05,719 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:02:05,720 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 03:02:05,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 03:02:05,732 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 03:02:05,798 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 03:02:05,798 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 03:02:05,798 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-21 03:02:05,798 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 03:02:05,799 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-21 03:02:05,799 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-21 03:02:05,799 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-01-21 03:02:05,800 INFO L87 Difference]: Start difference. First operand 38 states and 41 transitions. Second operand 5 states. [2018-01-21 03:02:05,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 03:02:05,946 INFO L93 Difference]: Finished difference Result 69 states and 75 transitions. [2018-01-21 03:02:05,947 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-01-21 03:02:05,947 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2018-01-21 03:02:05,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 03:02:05,948 INFO L225 Difference]: With dead ends: 69 [2018-01-21 03:02:05,948 INFO L226 Difference]: Without dead ends: 66 [2018-01-21 03:02:05,949 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 [2018-01-21 03:02:05,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-01-21 03:02:05,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 43. [2018-01-21 03:02:05,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-01-21 03:02:05,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2018-01-21 03:02:05,956 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 19 [2018-01-21 03:02:05,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 03:02:05,956 INFO L432 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2018-01-21 03:02:05,957 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-21 03:02:05,957 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2018-01-21 03:02:05,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-01-21 03:02:05,958 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 03:02:05,958 INFO L322 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 03:02:05,958 INFO L371 AbstractCegarLoop]: === Iteration 3 === [mainErr0EnsuresViolation]=== [2018-01-21 03:02:05,958 INFO L82 PathProgramCache]: Analyzing trace with hash 1944907653, now seen corresponding path program 1 times [2018-01-21 03:02:05,958 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 03:02:05,959 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:02:05,960 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 03:02:05,960 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:02:05,960 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 03:02:05,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 03:02:05,975 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 03:02:06,243 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-21 03:02:06,244 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 03:02:06,244 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-21 03:02:06,245 INFO L199 CegarAbsIntRunner]: Running AI on error trace of length 27 with the following transitions: [2018-01-21 03:02:06,248 INFO L201 CegarAbsIntRunner]: [0], [1], [7], [8], [9], [10], [11], [12], [13], [17], [19], [22], [45], [49], [51], [52], [53], [54], [62], [64], [68], [70], [71], [72], [73] [2018-01-21 03:02:06,307 INFO L147 AbstractInterpreter]: Using domain VPDomain [2018-01-21 03:02:06,307 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