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_precise.epf -i ../../../trunk/examples/svcomp/forester-heap/dll-rb-sentinel_false-unreach-call_false-valid-memtrack.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-2f49842 [2018-01-21 06:16:40,240 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-21 06:16:40,242 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-21 06:16:40,257 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-21 06:16:40,258 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-21 06:16:40,259 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-21 06:16:40,260 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-21 06:16:40,262 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-21 06:16:40,264 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-21 06:16:40,265 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-21 06:16:40,266 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-01-21 06:16:40,266 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-01-21 06:16:40,267 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-01-21 06:16:40,268 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-01-21 06:16:40,269 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-01-21 06:16:40,272 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-01-21 06:16:40,274 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-01-21 06:16:40,276 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-01-21 06:16:40,277 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-01-21 06:16:40,279 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-01-21 06:16:40,281 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-01-21 06:16:40,286 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-01-21 06:16:40,287 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-01-21 06:16:40,287 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_precise.epf [2018-01-21 06:16:40,297 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-21 06:16:40,298 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-21 06:16:40,298 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-21 06:16:40,299 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-21 06:16:40,299 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-21 06:16:40,299 INFO L133 SettingsManager]: * Weq Fattening=true [2018-01-21 06:16:40,299 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-21 06:16:40,299 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-21 06:16:40,300 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-21 06:16:40,300 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-21 06:16:40,301 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-21 06:16:40,301 INFO L133 SettingsManager]: * Check allocation purity=true [2018-01-21 06:16:40,301 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-21 06:16:40,301 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-21 06:16:40,301 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-21 06:16:40,301 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-01-21 06:16:40,302 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-21 06:16:40,302 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-01-21 06:16:40,302 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-21 06:16:40,302 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-01-21 06:16:40,302 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-01-21 06:16:40,303 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-21 06:16:40,303 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-01-21 06:16:40,303 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-21 06:16:40,303 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-21 06:16:40,303 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-21 06:16:40,304 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-21 06:16:40,304 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-21 06:16:40,304 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-21 06:16:40,304 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-21 06:16:40,304 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-21 06:16:40,305 INFO L133 SettingsManager]: * Stop after first violation was found=false [2018-01-21 06:16:40,305 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-01-21 06:16:40,305 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-21 06:16:40,305 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-21 06:16:40,305 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-21 06:16:40,305 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-01-21 06:16:40,306 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-21 06:16:40,307 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-21 06:16:40,340 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-21 06:16:40,353 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-21 06:16:40,357 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-21 06:16:40,359 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-21 06:16:40,360 INFO L276 PluginConnector]: CDTParser initialized [2018-01-21 06:16:40,360 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/forester-heap/dll-rb-sentinel_false-unreach-call_false-valid-memtrack.i [2018-01-21 06:16:40,526 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-21 06:16:40,529 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-21 06:16:40,530 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-21 06:16:40,530 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-21 06:16:40,535 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-21 06:16:40,536 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.01 06:16:40" (1/1) ... [2018-01-21 06:16:40,538 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b75990c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 06:16:40, skipping insertion in model container [2018-01-21 06:16:40,539 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.01 06:16:40" (1/1) ... [2018-01-21 06:16:40,555 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-21 06:16:40,594 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-21 06:16:40,710 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-21 06:16:40,731 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-21 06:16:40,741 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 06:16:40 WrapperNode [2018-01-21 06:16:40,741 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-21 06:16:40,742 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-21 06:16:40,742 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-21 06:16:40,742 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-21 06:16:40,754 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 06:16:40" (1/1) ... [2018-01-21 06:16:40,754 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 06:16:40" (1/1) ... [2018-01-21 06:16:40,763 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 06:16:40" (1/1) ... [2018-01-21 06:16:40,763 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 06:16:40" (1/1) ... [2018-01-21 06:16:40,769 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 06:16:40" (1/1) ... [2018-01-21 06:16:40,773 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 06:16:40" (1/1) ... [2018-01-21 06:16:40,774 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 06:16:40" (1/1) ... [2018-01-21 06:16:40,776 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-21 06:16:40,777 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-21 06:16:40,777 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-21 06:16:40,777 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-21 06:16:40,778 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 06:16:40" (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 06:16:40,825 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-21 06:16:40,825 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-21 06:16:40,826 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-21 06:16:40,826 INFO L128 BoogieDeclarations]: Found specification of procedure write~int [2018-01-21 06:16:40,826 INFO L128 BoogieDeclarations]: Found specification of procedure read~int [2018-01-21 06:16:40,826 INFO L128 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2018-01-21 06:16:40,826 INFO L128 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2018-01-21 06:16:40,826 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-01-21 06:16:40,827 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-01-21 06:16:40,827 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-01-21 06:16:40,827 INFO L128 BoogieDeclarations]: Found specification of procedure malloc [2018-01-21 06:16:40,827 INFO L128 BoogieDeclarations]: Found specification of procedure free [2018-01-21 06:16:40,827 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-01-21 06:16:40,827 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2018-01-21 06:16:40,827 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-21 06:16:40,828 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-21 06:16:40,828 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-21 06:16:41,222 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-21 06:16:41,223 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.01 06:16:41 BoogieIcfgContainer [2018-01-21 06:16:41,223 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-21 06:16:41,224 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-01-21 06:16:41,224 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-01-21 06:16:41,225 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-01-21 06:16:41,226 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.01 06:16:40" (1/3) ... [2018-01-21 06:16:41,226 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d30c256 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.01 06:16:41, skipping insertion in model container [2018-01-21 06:16:41,227 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 06:16:40" (2/3) ... [2018-01-21 06:16:41,227 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d30c256 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.01 06:16:41, skipping insertion in model container [2018-01-21 06:16:41,227 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.01 06:16:41" (3/3) ... [2018-01-21 06:16:41,228 INFO L105 eAbstractionObserver]: Analyzing ICFG dll-rb-sentinel_false-unreach-call_false-valid-memtrack.i [2018-01-21 06:16:41,235 INFO L130 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-01-21 06:16:41,241 INFO L142 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2018-01-21 06:16:41,289 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 06:16:41,289 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 06:16:41,290 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 06:16:41,290 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 06:16:41,290 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 06:16:41,290 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 06:16:41,290 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 06:16:41,290 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.initErr0EnsuresViolation======== [2018-01-21 06:16:41,291 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 06:16:41,313 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states. [2018-01-21 06:16:41,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-01-21 06:16:41,319 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 06:16:41,320 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-01-21 06:16:41,321 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.initErr0EnsuresViolation]=== [2018-01-21 06:16:41,325 INFO L82 PathProgramCache]: Analyzing trace with hash 266896, now seen corresponding path program 1 times [2018-01-21 06:16:41,328 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 06:16:41,381 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 06:16:41,381 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 06:16:41,381 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 06:16:41,381 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 06:16:41,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 06:16:41,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 06:16:41,438 INFO L381 BasicCegarLoop]: Counterexample might be feasible [2018-01-21 06:16:41,445 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 06:16:41,451 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 06:16:41,451 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 06:16:41,452 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 06:16:41,452 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 06:16:41,452 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 06:16:41,452 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 06:16:41,452 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 06:16:41,452 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.startErr0EnsuresViolation======== [2018-01-21 06:16:41,452 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 06:16:41,455 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states. [2018-01-21 06:16:41,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-01-21 06:16:41,456 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 06:16:41,456 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] [2018-01-21 06:16:41,456 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 06:16:41,457 INFO L82 PathProgramCache]: Analyzing trace with hash 1589472515, now seen corresponding path program 1 times [2018-01-21 06:16:41,457 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 06:16:41,458 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 06:16:41,459 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 06:16:41,459 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 06:16:41,459 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 06:16:41,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 06:16:41,505 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 06:16:41,653 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 06:16:41,655 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 06:16:41,655 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-21 06:16:41,655 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 06:16:41,658 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-21 06:16:41,668 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-21 06:16:41,668 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-21 06:16:41,670 INFO L87 Difference]: Start difference. First operand 96 states. Second operand 2 states. [2018-01-21 06:16:41,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 06:16:41,696 INFO L93 Difference]: Finished difference Result 175 states and 233 transitions. [2018-01-21 06:16:41,696 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-21 06:16:41,697 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 26 [2018-01-21 06:16:41,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 06:16:41,708 INFO L225 Difference]: With dead ends: 175 [2018-01-21 06:16:41,708 INFO L226 Difference]: Without dead ends: 93 [2018-01-21 06:16:41,711 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 06:16:41,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-01-21 06:16:41,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2018-01-21 06:16:41,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-01-21 06:16:41,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 98 transitions. [2018-01-21 06:16:41,747 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 98 transitions. Word has length 26 [2018-01-21 06:16:41,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 06:16:41,747 INFO L432 AbstractCegarLoop]: Abstraction has 93 states and 98 transitions. [2018-01-21 06:16:41,747 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-21 06:16:41,747 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 98 transitions. [2018-01-21 06:16:41,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-01-21 06:16:41,749 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 06:16:41,749 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 06:16:41,749 INFO L371 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 06:16:41,750 INFO L82 PathProgramCache]: Analyzing trace with hash -2068816306, now seen corresponding path program 1 times [2018-01-21 06:16:41,750 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 06:16:41,751 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 06:16:41,752 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 06:16:41,752 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 06:16:41,752 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 06:16:41,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 06:16:41,784 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 06:16:41,943 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 06:16:41,943 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 06:16:41,943 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2018-01-21 06:16:41,943 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 06:16:41,945 INFO L409 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-01-21 06:16:41,945 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-01-21 06:16:41,946 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2018-01-21 06:16:41,946 INFO L87 Difference]: Start difference. First operand 93 states and 98 transitions. Second operand 8 states. [2018-01-21 06:16:42,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 06:16:42,295 INFO L93 Difference]: Finished difference Result 152 states and 165 transitions. [2018-01-21 06:16:42,295 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-01-21 06:16:42,295 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 35 [2018-01-21 06:16:42,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 06:16:42,299 INFO L225 Difference]: With dead ends: 152 [2018-01-21 06:16:42,299 INFO L226 Difference]: Without dead ends: 133 [2018-01-21 06:16:42,300 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2018-01-21 06:16:42,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2018-01-21 06:16:42,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 95. [2018-01-21 06:16:42,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2018-01-21 06:16:42,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 100 transitions. [2018-01-21 06:16:42,307 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 100 transitions. Word has length 35 [2018-01-21 06:16:42,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 06:16:42,307 INFO L432 AbstractCegarLoop]: Abstraction has 95 states and 100 transitions. [2018-01-21 06:16:42,308 INFO L433 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-01-21 06:16:42,308 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 100 transitions. [2018-01-21 06:16:42,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-01-21 06:16:42,309 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 06:16:42,309 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, 1, 1, 1, 1, 1] [2018-01-21 06:16:42,309 INFO L371 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 06:16:42,309 INFO L82 PathProgramCache]: Analyzing trace with hash -308441856, now seen corresponding path program 1 times [2018-01-21 06:16:42,309 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 06:16:42,311 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 06:16:42,311 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 06:16:42,311 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 06:16:42,311 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 06:16:42,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 06:16:42,336 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 06:16:42,432 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-01-21 06:16:42,433 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 06:16:42,433 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2018-01-21 06:16:42,433 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 06:16:42,433 INFO L409 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-01-21 06:16:42,434 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-01-21 06:16:42,434 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2018-01-21 06:16:42,434 INFO L87 Difference]: Start difference. First operand 95 states and 100 transitions. Second operand 8 states. [2018-01-21 06:16:42,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 06:16:42,849 INFO L93 Difference]: Finished difference Result 130 states and 138 transitions. [2018-01-21 06:16:42,850 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-01-21 06:16:42,850 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 41 [2018-01-21 06:16:42,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 06:16:42,852 INFO L225 Difference]: With dead ends: 130 [2018-01-21 06:16:42,852 INFO L226 Difference]: Without dead ends: 125 [2018-01-21 06:16:42,852 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2018-01-21 06:16:42,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2018-01-21 06:16:42,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 97. [2018-01-21 06:16:42,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-01-21 06:16:42,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 102 transitions. [2018-01-21 06:16:42,859 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 102 transitions. Word has length 41 [2018-01-21 06:16:42,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 06:16:42,859 INFO L432 AbstractCegarLoop]: Abstraction has 97 states and 102 transitions. [2018-01-21 06:16:42,859 INFO L433 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-01-21 06:16:42,859 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 102 transitions. [2018-01-21 06:16:42,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-01-21 06:16:42,860 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 06:16:42,861 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] [2018-01-21 06:16:42,861 INFO L371 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 06:16:42,861 INFO L82 PathProgramCache]: Analyzing trace with hash 12114035, now seen corresponding path program 1 times [2018-01-21 06:16:42,861 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 06:16:42,862 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 06:16:42,862 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 06:16:42,862 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 06:16:42,862 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 06:16:42,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 06:16:42,880 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 06:16:43,232 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-01-21 06:16:43,232 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 06:16:43,232 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-21 06:16:43,234 INFO L199 CegarAbsIntRunner]: Running AI on error trace of length 50 with the following transitions: [2018-01-21 06:16:43,236 INFO L201 CegarAbsIntRunner]: [0], [1], [2], [3], [4], [5], [6], [7], [8], [9], [10], [14], [16], [19], [104], [108], [113], [117], [125], [126], [131], [135], [143], [147], [149], [150], [193], [195], [196], [202], [206], [208], [209], [220], [221], [222], [223], [224], [229], [230], [232], [233], [238], [239], [240], [241], [242] [2018-01-21 06:16:43,291 INFO L147 AbstractInterpreter]: Using domain VPDomain [2018-01-21 06:16:43,291 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