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_preciseopt.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 08:58:52,462 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-21 08:58:52,464 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-21 08:58:52,479 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-21 08:58:52,480 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-21 08:58:52,480 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-21 08:58:52,481 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-21 08:58:52,482 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-21 08:58:52,484 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-21 08:58:52,485 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-21 08:58:52,485 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-01-21 08:58:52,485 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-01-21 08:58:52,486 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-01-21 08:58:52,487 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-01-21 08:58:52,487 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-01-21 08:58:52,490 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-01-21 08:58:52,492 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-01-21 08:58:52,494 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-01-21 08:58:52,495 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-01-21 08:58:52,497 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-01-21 08:58:52,499 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-01-21 08:58:52,504 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-01-21 08:58:52,505 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-01-21 08:58:52,505 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_preciseopt.epf [2018-01-21 08:58:52,522 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-21 08:58:52,523 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-21 08:58:52,523 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-21 08:58:52,524 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-21 08:58:52,524 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-21 08:58:52,524 INFO L133 SettingsManager]: * Weq Fattening=true [2018-01-21 08:58:52,524 INFO L133 SettingsManager]: * Flatten before fatten=true [2018-01-21 08:58:52,524 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-21 08:58:52,525 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-21 08:58:52,525 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-21 08:58:52,526 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-21 08:58:52,526 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-21 08:58:52,526 INFO L133 SettingsManager]: * Check allocation purity=true [2018-01-21 08:58:52,526 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-21 08:58:52,526 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-21 08:58:52,527 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-21 08:58:52,527 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-01-21 08:58:52,527 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-21 08:58:52,527 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-01-21 08:58:52,527 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-21 08:58:52,528 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-01-21 08:58:52,528 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-01-21 08:58:52,528 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-21 08:58:52,528 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-01-21 08:58:52,528 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-21 08:58:52,529 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-21 08:58:52,529 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-21 08:58:52,529 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-21 08:58:52,529 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-21 08:58:52,529 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-21 08:58:52,529 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-21 08:58:52,530 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-21 08:58:52,530 INFO L133 SettingsManager]: * Stop after first violation was found=false [2018-01-21 08:58:52,530 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-01-21 08:58:52,530 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-21 08:58:52,530 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-21 08:58:52,530 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-21 08:58:52,531 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-01-21 08:58:52,531 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-21 08:58:52,532 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-21 08:58:52,567 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-21 08:58:52,615 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-21 08:58:52,618 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-21 08:58:52,619 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-21 08:58:52,620 INFO L276 PluginConnector]: CDTParser initialized [2018-01-21 08:58:52,620 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/forester-heap/dll-rb-sentinel_false-unreach-call_false-valid-memtrack.i [2018-01-21 08:58:52,800 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-21 08:58:52,805 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-21 08:58:52,833 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-21 08:58:52,833 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-21 08:58:52,839 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-21 08:58:52,840 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.01 08:58:52" (1/1) ... [2018-01-21 08:58:52,842 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@860cd99 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 08:58:52, skipping insertion in model container [2018-01-21 08:58:52,843 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.01 08:58:52" (1/1) ... [2018-01-21 08:58:52,861 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-21 08:58:52,901 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-21 08:58:53,023 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-21 08:58:53,050 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-21 08:58:53,058 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 08:58:53 WrapperNode [2018-01-21 08:58:53,058 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-21 08:58:53,059 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-21 08:58:53,059 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-21 08:58:53,059 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-21 08:58:53,070 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 08:58:53" (1/1) ... [2018-01-21 08:58:53,070 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 08:58:53" (1/1) ... [2018-01-21 08:58:53,079 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 08:58:53" (1/1) ... [2018-01-21 08:58:53,079 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 08:58:53" (1/1) ... [2018-01-21 08:58:53,084 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 08:58:53" (1/1) ... [2018-01-21 08:58:53,088 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 08:58:53" (1/1) ... [2018-01-21 08:58:53,090 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 08:58:53" (1/1) ... [2018-01-21 08:58:53,092 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-21 08:58:53,092 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-21 08:58:53,093 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-21 08:58:53,093 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-21 08:58:53,094 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 08:58:53" (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 08:58:53,180 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-21 08:58:53,180 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-21 08:58:53,180 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-21 08:58:53,180 INFO L128 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2018-01-21 08:58:53,181 INFO L128 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2018-01-21 08:58:53,181 INFO L128 BoogieDeclarations]: Found specification of procedure write~int [2018-01-21 08:58:53,181 INFO L128 BoogieDeclarations]: Found specification of procedure read~int [2018-01-21 08:58:53,181 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-01-21 08:58:53,181 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-01-21 08:58:53,181 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-01-21 08:58:53,181 INFO L128 BoogieDeclarations]: Found specification of procedure malloc [2018-01-21 08:58:53,181 INFO L128 BoogieDeclarations]: Found specification of procedure free [2018-01-21 08:58:53,181 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-01-21 08:58:53,181 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2018-01-21 08:58:53,182 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-21 08:58:53,182 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-21 08:58:53,182 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-21 08:58:53,587 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-21 08:58:53,587 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.01 08:58:53 BoogieIcfgContainer [2018-01-21 08:58:53,588 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-21 08:58:53,589 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-01-21 08:58:53,589 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-01-21 08:58:53,591 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-01-21 08:58:53,592 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.01 08:58:52" (1/3) ... [2018-01-21 08:58:53,593 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@340a1271 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.01 08:58:53, skipping insertion in model container [2018-01-21 08:58:53,593 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 08:58:53" (2/3) ... [2018-01-21 08:58:53,594 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@340a1271 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.01 08:58:53, skipping insertion in model container [2018-01-21 08:58:53,594 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.01 08:58:53" (3/3) ... [2018-01-21 08:58:53,596 INFO L105 eAbstractionObserver]: Analyzing ICFG dll-rb-sentinel_false-unreach-call_false-valid-memtrack.i [2018-01-21 08:58:53,605 INFO L130 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-01-21 08:58:53,613 INFO L142 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2018-01-21 08:58:53,675 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 08:58:53,675 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 08:58:53,675 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 08:58:53,675 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 08:58:53,675 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 08:58:53,675 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 08:58:53,675 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 08:58:53,675 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.initErr0EnsuresViolation======== [2018-01-21 08:58:53,676 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 08:58:53,693 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states. [2018-01-21 08:58:53,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-01-21 08:58:53,700 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 08:58:53,701 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-01-21 08:58:53,701 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.initErr0EnsuresViolation]=== [2018-01-21 08:58:53,706 INFO L82 PathProgramCache]: Analyzing trace with hash 266896, now seen corresponding path program 1 times [2018-01-21 08:58:53,707 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 08:58:53,754 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:58:53,755 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 08:58:53,755 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:58:53,755 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 08:58:53,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 08:58:53,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 08:58:53,801 INFO L381 BasicCegarLoop]: Counterexample might be feasible [2018-01-21 08:58:53,806 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 08:58:53,814 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 08:58:53,814 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 08:58:53,814 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 08:58:53,814 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 08:58:53,814 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 08:58:53,815 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 08:58:53,815 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 08:58:53,815 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.startErr0EnsuresViolation======== [2018-01-21 08:58:53,815 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 08:58:53,818 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states. [2018-01-21 08:58:53,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-01-21 08:58:53,821 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 08:58:53,821 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 08:58:53,821 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 08:58:53,821 INFO L82 PathProgramCache]: Analyzing trace with hash 1589472515, now seen corresponding path program 1 times [2018-01-21 08:58:53,821 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 08:58:53,823 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:58:53,823 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 08:58:53,823 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:58:53,823 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 08:58:53,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 08:58:53,864 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 08:58:54,007 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 08:58:54,009 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 08:58:54,009 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-21 08:58:54,010 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 08:58:54,013 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-21 08:58:54,028 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-21 08:58:54,028 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-21 08:58:54,030 INFO L87 Difference]: Start difference. First operand 96 states. Second operand 2 states. [2018-01-21 08:58:54,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 08:58:54,057 INFO L93 Difference]: Finished difference Result 175 states and 233 transitions. [2018-01-21 08:58:54,057 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-21 08:58:54,058 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 26 [2018-01-21 08:58:54,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 08:58:54,069 INFO L225 Difference]: With dead ends: 175 [2018-01-21 08:58:54,069 INFO L226 Difference]: Without dead ends: 93 [2018-01-21 08:58:54,072 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 08:58:54,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-01-21 08:58:54,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2018-01-21 08:58:54,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-01-21 08:58:54,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 98 transitions. [2018-01-21 08:58:54,107 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 98 transitions. Word has length 26 [2018-01-21 08:58:54,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 08:58:54,108 INFO L432 AbstractCegarLoop]: Abstraction has 93 states and 98 transitions. [2018-01-21 08:58:54,108 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-21 08:58:54,108 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 98 transitions. [2018-01-21 08:58:54,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-01-21 08:58:54,110 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 08:58:54,110 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 08:58:54,110 INFO L371 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 08:58:54,110 INFO L82 PathProgramCache]: Analyzing trace with hash -2068816306, now seen corresponding path program 1 times [2018-01-21 08:58:54,110 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 08:58:54,112 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:58:54,112 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 08:58:54,113 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:58:54,113 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 08:58:54,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 08:58:54,147 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 08:58:54,278 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 08:58:54,279 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 08:58:54,279 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2018-01-21 08:58:54,279 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 08:58:54,281 INFO L409 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-01-21 08:58:54,281 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-01-21 08:58:54,282 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2018-01-21 08:58:54,282 INFO L87 Difference]: Start difference. First operand 93 states and 98 transitions. Second operand 8 states. [2018-01-21 08:58:54,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 08:58:54,561 INFO L93 Difference]: Finished difference Result 152 states and 165 transitions. [2018-01-21 08:58:54,561 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-01-21 08:58:54,561 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 35 [2018-01-21 08:58:54,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 08:58:54,565 INFO L225 Difference]: With dead ends: 152 [2018-01-21 08:58:54,565 INFO L226 Difference]: Without dead ends: 133 [2018-01-21 08:58:54,566 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2018-01-21 08:58:54,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2018-01-21 08:58:54,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 95. [2018-01-21 08:58:54,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2018-01-21 08:58:54,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 100 transitions. [2018-01-21 08:58:54,574 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 100 transitions. Word has length 35 [2018-01-21 08:58:54,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 08:58:54,574 INFO L432 AbstractCegarLoop]: Abstraction has 95 states and 100 transitions. [2018-01-21 08:58:54,574 INFO L433 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-01-21 08:58:54,574 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 100 transitions. [2018-01-21 08:58:54,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-01-21 08:58:54,575 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 08:58:54,575 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 08:58:54,575 INFO L371 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 08:58:54,576 INFO L82 PathProgramCache]: Analyzing trace with hash -308441856, now seen corresponding path program 1 times [2018-01-21 08:58:54,576 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 08:58:54,577 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:58:54,578 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 08:58:54,578 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:58:54,578 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 08:58:54,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 08:58:54,599 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 08:58:54,682 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 08:58:54,682 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 08:58:54,682 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2018-01-21 08:58:54,682 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 08:58:54,683 INFO L409 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-01-21 08:58:54,683 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-01-21 08:58:54,683 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2018-01-21 08:58:54,683 INFO L87 Difference]: Start difference. First operand 95 states and 100 transitions. Second operand 8 states. [2018-01-21 08:58:54,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 08:58:54,976 INFO L93 Difference]: Finished difference Result 130 states and 138 transitions. [2018-01-21 08:58:54,976 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-01-21 08:58:54,977 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 41 [2018-01-21 08:58:54,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 08:58:54,978 INFO L225 Difference]: With dead ends: 130 [2018-01-21 08:58:54,978 INFO L226 Difference]: Without dead ends: 125 [2018-01-21 08:58:54,979 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 08:58:54,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2018-01-21 08:58:54,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 97. [2018-01-21 08:58:54,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-01-21 08:58:54,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 102 transitions. [2018-01-21 08:58:54,986 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 102 transitions. Word has length 41 [2018-01-21 08:58:54,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 08:58:54,987 INFO L432 AbstractCegarLoop]: Abstraction has 97 states and 102 transitions. [2018-01-21 08:58:54,987 INFO L433 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-01-21 08:58:54,987 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 102 transitions. [2018-01-21 08:58:54,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-01-21 08:58:54,989 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 08:58:54,989 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 08:58:54,989 INFO L371 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 08:58:54,990 INFO L82 PathProgramCache]: Analyzing trace with hash 12114035, now seen corresponding path program 1 times [2018-01-21 08:58:54,990 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 08:58:54,991 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:58:54,991 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 08:58:54,991 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:58:54,991 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 08:58:55,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 08:58:55,015 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 08:58:55,327 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 08:58:55,327 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 08:58:55,327 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-21 08:58:55,328 INFO L199 CegarAbsIntRunner]: Running AI on error trace of length 50 with the following transitions: [2018-01-21 08:58:55,330 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 08:58:55,390 INFO L147 AbstractInterpreter]: Using domain VPDomain [2018-01-21 08:58:55,391 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