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/memsafety-ext/tree_parent_ptr_true-valid-memsafety_false-termination.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-2f49842 [2018-01-20 23:37:39,098 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-20 23:37:39,100 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-20 23:37:39,115 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-20 23:37:39,115 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-20 23:37:39,116 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-20 23:37:39,118 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-20 23:37:39,119 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-20 23:37:39,121 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-20 23:37:39,122 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-20 23:37:39,123 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-01-20 23:37:39,123 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-01-20 23:37:39,124 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-01-20 23:37:39,125 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-01-20 23:37:39,126 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-01-20 23:37:39,128 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-01-20 23:37:39,131 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-01-20 23:37:39,133 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-01-20 23:37:39,134 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-01-20 23:37:39,135 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-01-20 23:37:39,138 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-01-20 23:37:39,143 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-01-20 23:37:39,143 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-01-20 23:37:39,144 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 [2018-01-20 23:37:39,152 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-20 23:37:39,153 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-20 23:37:39,153 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-20 23:37:39,154 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-20 23:37:39,154 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-20 23:37:39,154 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-20 23:37:39,154 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-20 23:37:39,154 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-20 23:37:39,154 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-20 23:37:39,155 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-20 23:37:39,155 INFO L133 SettingsManager]: * Check allocation purity=true [2018-01-20 23:37:39,155 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-20 23:37:39,155 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-20 23:37:39,155 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-20 23:37:39,155 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-01-20 23:37:39,155 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-20 23:37:39,155 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-01-20 23:37:39,156 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-20 23:37:39,156 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-01-20 23:37:39,156 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-01-20 23:37:39,156 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-20 23:37:39,156 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-01-20 23:37:39,156 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-20 23:37:39,156 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-20 23:37:39,157 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-20 23:37:39,157 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-20 23:37:39,157 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-20 23:37:39,157 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-20 23:37:39,157 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-20 23:37:39,157 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-20 23:37:39,158 INFO L133 SettingsManager]: * Stop after first violation was found=false [2018-01-20 23:37:39,158 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-01-20 23:37:39,158 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-20 23:37:39,158 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-20 23:37:39,158 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-20 23:37:39,158 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-01-20 23:37:39,159 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-20 23:37:39,159 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-20 23:37:39,192 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-20 23:37:39,203 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-20 23:37:39,207 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-20 23:37:39,208 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-20 23:37:39,209 INFO L276 PluginConnector]: CDTParser initialized [2018-01-20 23:37:39,209 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/memsafety-ext/tree_parent_ptr_true-valid-memsafety_false-termination.i [2018-01-20 23:37:39,384 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-20 23:37:39,388 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-20 23:37:39,389 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-20 23:37:39,389 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-20 23:37:39,394 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-20 23:37:39,395 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.01 11:37:39" (1/1) ... [2018-01-20 23:37:39,398 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1188456b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 11:37:39, skipping insertion in model container [2018-01-20 23:37:39,398 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.01 11:37:39" (1/1) ... [2018-01-20 23:37:39,411 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-20 23:37:39,447 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-20 23:37:39,569 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-20 23:37:39,593 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-20 23:37:39,603 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 11:37:39 WrapperNode [2018-01-20 23:37:39,603 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-20 23:37:39,604 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-20 23:37:39,604 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-20 23:37:39,604 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-20 23:37:39,620 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 11:37:39" (1/1) ... [2018-01-20 23:37:39,620 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 11:37:39" (1/1) ... [2018-01-20 23:37:39,629 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 11:37:39" (1/1) ... [2018-01-20 23:37:39,630 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 11:37:39" (1/1) ... [2018-01-20 23:37:39,638 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 11:37:39" (1/1) ... [2018-01-20 23:37:39,643 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 11:37:39" (1/1) ... [2018-01-20 23:37:39,645 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 11:37:39" (1/1) ... [2018-01-20 23:37:39,647 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-20 23:37:39,648 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-20 23:37:39,648 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-20 23:37:39,648 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-20 23:37:39,649 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 11:37:39" (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 [2018-01-20 23:37:39,698 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-20 23:37:39,698 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-20 23:37:39,698 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-20 23:37:39,699 INFO L128 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2018-01-20 23:37:39,699 INFO L128 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2018-01-20 23:37:39,699 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-01-20 23:37:39,699 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-01-20 23:37:39,699 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-01-20 23:37:39,699 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-01-20 23:37:39,700 INFO L128 BoogieDeclarations]: Found specification of procedure malloc [2018-01-20 23:37:39,700 INFO L128 BoogieDeclarations]: Found specification of procedure free [2018-01-20 23:37:39,700 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-20 23:37:39,700 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-20 23:37:39,700 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-20 23:37:40,049 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-20 23:37:40,050 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.01 11:37:40 BoogieIcfgContainer [2018-01-20 23:37:40,050 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-20 23:37:40,050 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-01-20 23:37:40,051 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-01-20 23:37:40,052 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-01-20 23:37:40,052 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.01 11:37:39" (1/3) ... [2018-01-20 23:37:40,053 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7508aef7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.01 11:37:40, skipping insertion in model container [2018-01-20 23:37:40,053 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 11:37:39" (2/3) ... [2018-01-20 23:37:40,054 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7508aef7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.01 11:37:40, skipping insertion in model container [2018-01-20 23:37:40,054 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.01 11:37:40" (3/3) ... [2018-01-20 23:37:40,055 INFO L105 eAbstractionObserver]: Analyzing ICFG tree_parent_ptr_true-valid-memsafety_false-termination.i [2018-01-20 23:37:40,062 INFO L130 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-01-20 23:37:40,067 INFO L142 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2018-01-20 23:37:40,111 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-20 23:37:40,111 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-20 23:37:40,111 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-20 23:37:40,111 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-20 23:37:40,111 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-20 23:37:40,111 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-20 23:37:40,111 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-20 23:37:40,112 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.initErr0EnsuresViolation======== [2018-01-20 23:37:40,112 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-20 23:37:40,128 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states. [2018-01-20 23:37:40,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-01-20 23:37:40,133 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 23:37:40,134 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-01-20 23:37:40,134 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.initErr0EnsuresViolation]=== [2018-01-20 23:37:40,137 INFO L82 PathProgramCache]: Analyzing trace with hash 185475, now seen corresponding path program 1 times [2018-01-20 23:37:40,139 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-20 23:37:40,183 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 23:37:40,184 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 23:37:40,184 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 23:37:40,184 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-20 23:37:40,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-20 23:37:40,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-20 23:37:40,240 INFO L381 BasicCegarLoop]: Counterexample might be feasible [2018-01-20 23:37:40,246 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-20 23:37:40,252 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-20 23:37:40,252 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-20 23:37:40,253 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-20 23:37:40,253 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-20 23:37:40,253 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-20 23:37:40,253 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-20 23:37:40,253 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-20 23:37:40,253 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.startErr0EnsuresViolation======== [2018-01-20 23:37:40,253 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-20 23:37:40,255 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states. [2018-01-20 23:37:40,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-01-20 23:37:40,257 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 23:37:40,257 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] [2018-01-20 23:37:40,257 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 23:37:40,257 INFO L82 PathProgramCache]: Analyzing trace with hash -1602735979, now seen corresponding path program 1 times [2018-01-20 23:37:40,257 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-20 23:37:40,258 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 23:37:40,258 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 23:37:40,258 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 23:37:40,258 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-20 23:37:40,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 23:37:40,292 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 23:37:40,335 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 23:37:40,337 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-20 23:37:40,337 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-20 23:37:40,338 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-20 23:37:40,340 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-20 23:37:40,429 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-20 23:37:40,430 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-20 23:37:40,433 INFO L87 Difference]: Start difference. First operand 92 states. Second operand 2 states. [2018-01-20 23:37:40,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 23:37:40,459 INFO L93 Difference]: Finished difference Result 173 states and 199 transitions. [2018-01-20 23:37:40,459 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-20 23:37:40,460 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 21 [2018-01-20 23:37:40,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 23:37:40,468 INFO L225 Difference]: With dead ends: 173 [2018-01-20 23:37:40,468 INFO L226 Difference]: Without dead ends: 89 [2018-01-20 23:37:40,472 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 [2018-01-20 23:37:40,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-01-20 23:37:40,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2018-01-20 23:37:40,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-01-20 23:37:40,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 99 transitions. [2018-01-20 23:37:40,514 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 99 transitions. Word has length 21 [2018-01-20 23:37:40,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 23:37:40,514 INFO L432 AbstractCegarLoop]: Abstraction has 89 states and 99 transitions. [2018-01-20 23:37:40,514 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-20 23:37:40,514 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 99 transitions. [2018-01-20 23:37:40,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-01-20 23:37:40,515 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 23:37:40,515 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] [2018-01-20 23:37:40,516 INFO L371 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 23:37:40,516 INFO L82 PathProgramCache]: Analyzing trace with hash 553744969, now seen corresponding path program 1 times [2018-01-20 23:37:40,516 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-20 23:37:40,517 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 23:37:40,517 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 23:37:40,517 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 23:37:40,517 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-20 23:37:40,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 23:37:40,540 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 23:37:40,624 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 23:37:40,624 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-20 23:37:40,624 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-01-20 23:37:40,625 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-20 23:37:40,626 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-20 23:37:40,627 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-20 23:37:40,627 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-20 23:37:40,627 INFO L87 Difference]: Start difference. First operand 89 states and 99 transitions. Second operand 4 states. [2018-01-20 23:37:40,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 23:37:40,680 INFO L93 Difference]: Finished difference Result 98 states and 108 transitions. [2018-01-20 23:37:40,680 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-01-20 23:37:40,680 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2018-01-20 23:37:40,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 23:37:40,682 INFO L225 Difference]: With dead ends: 98 [2018-01-20 23:37:40,683 INFO L226 Difference]: Without dead ends: 93 [2018-01-20 23:37:40,684 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 [2018-01-20 23:37:40,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-01-20 23:37:40,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 91. [2018-01-20 23:37:40,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-01-20 23:37:40,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 101 transitions. [2018-01-20 23:37:40,694 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 101 transitions. Word has length 24 [2018-01-20 23:37:40,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 23:37:40,694 INFO L432 AbstractCegarLoop]: Abstraction has 91 states and 101 transitions. [2018-01-20 23:37:40,694 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-20 23:37:40,695 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 101 transitions. [2018-01-20 23:37:40,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-01-20 23:37:40,696 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 23:37:40,697 INFO L322 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 23:37:40,697 INFO L371 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 23:37:40,697 INFO L82 PathProgramCache]: Analyzing trace with hash -1841085354, now seen corresponding path program 1 times [2018-01-20 23:37:40,697 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-20 23:37:40,698 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 23:37:40,698 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 23:37:40,698 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 23:37:40,698 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-20 23:37:40,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-20 23:37:40,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-20 23:37:40,779 INFO L381 BasicCegarLoop]: Counterexample might be feasible [2018-01-20 23:37:40,789 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-20 23:37:40,797 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-20 23:37:40,798 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-20 23:37:40,813 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-20 23:37:40,814 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-20 23:37:40,814 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-20 23:37:40,814 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-20 23:37:40,814 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-20 23:37:40,814 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-20 23:37:40,814 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-20 23:37:40,814 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == mainErr0EnsuresViolation======== [2018-01-20 23:37:40,814 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-20 23:37:40,817 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states. [2018-01-20 23:37:40,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-01-20 23:37:40,818 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 23:37:40,818 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 23:37:40,818 INFO L371 AbstractCegarLoop]: === Iteration 1 === [mainErr0EnsuresViolation]=== [2018-01-20 23:37:40,818 INFO L82 PathProgramCache]: Analyzing trace with hash 2000564629, now seen corresponding path program 1 times [2018-01-20 23:37:40,818 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-20 23:37:40,819 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 23:37:40,819 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 23:37:40,819 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 23:37:40,820 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-20 23:37:40,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 23:37:40,827 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 23:37:40,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 23:37:40,841 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-20 23:37:40,841 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-20 23:37:40,841 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-20 23:37:40,841 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-20 23:37:40,842 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-20 23:37:40,842 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-20 23:37:40,842 INFO L87 Difference]: Start difference. First operand 92 states. Second operand 2 states. [2018-01-20 23:37:40,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 23:37:40,850 INFO L93 Difference]: Finished difference Result 173 states and 199 transitions. [2018-01-20 23:37:40,850 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-20 23:37:40,850 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 19 [2018-01-20 23:37:40,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 23:37:40,851 INFO L225 Difference]: With dead ends: 173 [2018-01-20 23:37:40,851 INFO L226 Difference]: Without dead ends: 87 [2018-01-20 23:37:40,852 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 [2018-01-20 23:37:40,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2018-01-20 23:37:40,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2018-01-20 23:37:40,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-01-20 23:37:40,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 97 transitions. [2018-01-20 23:37:40,857 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 97 transitions. Word has length 19 [2018-01-20 23:37:40,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 23:37:40,857 INFO L432 AbstractCegarLoop]: Abstraction has 87 states and 97 transitions. [2018-01-20 23:37:40,857 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-20 23:37:40,857 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 97 transitions. [2018-01-20 23:37:40,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-01-20 23:37:40,858 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 23:37:40,858 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] [2018-01-20 23:37:40,858 INFO L371 AbstractCegarLoop]: === Iteration 2 === [mainErr0EnsuresViolation]=== [2018-01-20 23:37:40,858 INFO L82 PathProgramCache]: Analyzing trace with hash -1791600567, now seen corresponding path program 1 times [2018-01-20 23:37:40,858 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-20 23:37:40,859 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 23:37:40,859 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 23:37:40,859 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 23:37:40,859 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-20 23:37:40,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 23:37:40,872 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 23:37:40,914 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 23:37:40,915 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-20 23:37:40,915 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-01-20 23:37:40,915 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-20 23:37:40,915 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-20 23:37:40,916 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-20 23:37:40,916 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-20 23:37:40,916 INFO L87 Difference]: Start difference. First operand 87 states and 97 transitions. Second operand 4 states. [2018-01-20 23:37:40,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 23:37:40,945 INFO L93 Difference]: Finished difference Result 94 states and 104 transitions. [2018-01-20 23:37:40,945 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-01-20 23:37:40,945 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2018-01-20 23:37:40,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 23:37:40,946 INFO L225 Difference]: With dead ends: 94 [2018-01-20 23:37:40,946 INFO L226 Difference]: Without dead ends: 91 [2018-01-20 23:37:40,946 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 [2018-01-20 23:37:40,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-01-20 23:37:40,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 89. [2018-01-20 23:37:40,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-01-20 23:37:40,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 99 transitions. [2018-01-20 23:37:40,952 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 99 transitions. Word has length 22 [2018-01-20 23:37:40,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 23:37:40,952 INFO L432 AbstractCegarLoop]: Abstraction has 89 states and 99 transitions. [2018-01-20 23:37:40,952 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-20 23:37:40,953 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 99 transitions. [2018-01-20 23:37:40,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-01-20 23:37:40,954 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 23:37:40,954 INFO L322 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 23:37:40,954 INFO L371 AbstractCegarLoop]: === Iteration 3 === [mainErr0EnsuresViolation]=== [2018-01-20 23:37:40,954 INFO L82 PathProgramCache]: Analyzing trace with hash -2138226282, now seen corresponding path program 1 times [2018-01-20 23:37:40,954 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-20 23:37:40,955 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 23:37:40,955 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 23:37:40,955 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 23:37:40,955 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-20 23:37:40,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 23:37:40,978 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 23:37:41,524 WARN L146 SmtUtils]: Spent 101ms on a formula simplification. DAG size of input: 38 DAG size of output 23 [2018-01-20 23:37:41,730 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 23:37:41,731 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-20 23:37:41,764 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-20 23:37:41,765 INFO L199 CegarAbsIntRunner]: Running AI on error trace of length 35 with the following transitions: [2018-01-20 23:37:41,767 INFO L201 CegarAbsIntRunner]: [0], [1], [7], [8], [9], [10], [11], [15], [17], [20], [109], [110], [111], [112], [113], [117], [121], [123], [124], [125], [126], [127], [128], [129], [140], [142], [153], [155], [159], [161], [162], [163], [164] [2018-01-20 23:37:41,822 INFO L147 AbstractInterpreter]: Using domain VPDomain [2018-01-20 23:37:41,823 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