java -Xmx6000000000 -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data ./data --generate-csv --csv-dir ../../../releaseScripts/default/UAutomizer-linux/csv -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/ai/eq-bench/mempurity-32bit-Automizer_Taipan+AI_EQ_mostprecise.epf -i ../../../trunk/examples/svcomp/array-memsafety/reverse_array_unsafe_false-valid-deref.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-2f49842 [2018-01-21 02:47:42,809 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-21 02:47:42,811 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-21 02:47:42,827 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-21 02:47:42,827 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-21 02:47:42,829 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-21 02:47:42,830 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-21 02:47:42,831 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-21 02:47:42,834 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-21 02:47:42,835 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-21 02:47:42,836 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-01-21 02:47:42,836 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-01-21 02:47:42,837 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-01-21 02:47:42,839 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-01-21 02:47:42,840 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-01-21 02:47:42,842 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-01-21 02:47:42,845 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-01-21 02:47:42,847 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-01-21 02:47:42,848 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-01-21 02:47:42,850 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-01-21 02:47:42,852 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-01-21 02:47:42,858 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-01-21 02:47:42,859 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-01-21 02:47:42,859 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/eq-bench/mempurity-32bit-Automizer_Taipan+AI_EQ_mostprecise.epf [2018-01-21 02:47:42,868 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-21 02:47:42,869 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-21 02:47:42,869 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-21 02:47:42,870 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-21 02:47:42,870 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-21 02:47:42,870 INFO L133 SettingsManager]: * Weq Fattening=true [2018-01-21 02:47:42,870 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-21 02:47:42,870 INFO L133 SettingsManager]: * Precise comparison operator=true [2018-01-21 02:47:42,870 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-21 02:47:42,871 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-21 02:47:42,871 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-21 02:47:42,871 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-21 02:47:42,871 INFO L133 SettingsManager]: * Check allocation purity=true [2018-01-21 02:47:42,872 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-21 02:47:42,872 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-21 02:47:42,872 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-21 02:47:42,872 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-01-21 02:47:42,872 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-21 02:47:42,872 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-01-21 02:47:42,872 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-21 02:47:42,872 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-01-21 02:47:42,873 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-01-21 02:47:42,873 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-21 02:47:42,873 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-01-21 02:47:42,873 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-21 02:47:42,874 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-21 02:47:42,874 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-21 02:47:42,874 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-21 02:47:42,874 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-21 02:47:42,874 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-21 02:47:42,874 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-21 02:47:42,874 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-21 02:47:42,874 INFO L133 SettingsManager]: * Stop after first violation was found=false [2018-01-21 02:47:42,875 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-01-21 02:47:42,875 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-21 02:47:42,875 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-21 02:47:42,875 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-21 02:47:42,875 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-01-21 02:47:42,876 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-21 02:47:42,876 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-21 02:47:42,909 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-21 02:47:42,920 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-21 02:47:42,924 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-21 02:47:42,925 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-21 02:47:42,926 INFO L276 PluginConnector]: CDTParser initialized [2018-01-21 02:47:42,926 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-memsafety/reverse_array_unsafe_false-valid-deref.i [2018-01-21 02:47:43,098 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-21 02:47:43,102 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-21 02:47:43,103 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-21 02:47:43,103 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-21 02:47:43,108 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-21 02:47:43,109 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.01 02:47:43" (1/1) ... [2018-01-21 02:47:43,112 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4aa56ad5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 02:47:43, skipping insertion in model container [2018-01-21 02:47:43,112 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.01 02:47:43" (1/1) ... [2018-01-21 02:47:43,125 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-21 02:47:43,199 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-21 02:47:43,312 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-21 02:47:43,329 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-21 02:47:43,336 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 02:47:43 WrapperNode [2018-01-21 02:47:43,337 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-21 02:47:43,337 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-21 02:47:43,337 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-21 02:47:43,337 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-21 02:47:43,348 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 02:47:43" (1/1) ... [2018-01-21 02:47:43,349 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 02:47:43" (1/1) ... [2018-01-21 02:47:43,357 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 02:47:43" (1/1) ... [2018-01-21 02:47:43,357 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 02:47:43" (1/1) ... [2018-01-21 02:47:43,359 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 02:47:43" (1/1) ... [2018-01-21 02:47:43,362 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 02:47:43" (1/1) ... [2018-01-21 02:47:43,363 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 02:47:43" (1/1) ... [2018-01-21 02:47:43,365 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-21 02:47:43,365 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-21 02:47:43,365 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-21 02:47:43,365 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-21 02:47:43,366 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 02:47:43" (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 02:47:43,425 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-21 02:47:43,426 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-21 02:47:43,426 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-21 02:47:43,426 INFO L128 BoogieDeclarations]: Found specification of procedure write~int [2018-01-21 02:47:43,426 INFO L128 BoogieDeclarations]: Found specification of procedure read~int [2018-01-21 02:47:43,426 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-01-21 02:47:43,426 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-01-21 02:47:43,426 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-01-21 02:47:43,426 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-01-21 02:47:43,426 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-21 02:47:43,426 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-21 02:47:43,427 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-21 02:47:43,618 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-21 02:47:43,619 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.01 02:47:43 BoogieIcfgContainer [2018-01-21 02:47:43,619 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-21 02:47:43,620 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-01-21 02:47:43,620 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-01-21 02:47:43,622 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-01-21 02:47:43,622 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.01 02:47:43" (1/3) ... [2018-01-21 02:47:43,623 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48dda12 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.01 02:47:43, skipping insertion in model container [2018-01-21 02:47:43,623 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 02:47:43" (2/3) ... [2018-01-21 02:47:43,623 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48dda12 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.01 02:47:43, skipping insertion in model container [2018-01-21 02:47:43,623 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.01 02:47:43" (3/3) ... [2018-01-21 02:47:43,625 INFO L105 eAbstractionObserver]: Analyzing ICFG reverse_array_unsafe_false-valid-deref.i [2018-01-21 02:47:43,632 INFO L130 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-01-21 02:47:43,638 INFO L142 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2018-01-21 02:47:43,679 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 02:47:43,680 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 02:47:43,680 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 02:47:43,680 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 02:47:43,680 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 02:47:43,680 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 02:47:43,680 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 02:47:43,680 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.initErr0EnsuresViolation======== [2018-01-21 02:47:43,681 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 02:47:43,718 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states. [2018-01-21 02:47:43,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-01-21 02:47:43,725 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 02:47:43,726 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-01-21 02:47:43,726 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.initErr0EnsuresViolation]=== [2018-01-21 02:47:43,731 INFO L82 PathProgramCache]: Analyzing trace with hash 109556, now seen corresponding path program 1 times [2018-01-21 02:47:43,733 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 02:47:43,811 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 02:47:43,811 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 02:47:43,811 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 02:47:43,811 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 02:47:43,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 02:47:43,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 02:47:43,869 INFO L381 BasicCegarLoop]: Counterexample might be feasible [2018-01-21 02:47:43,875 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 02:47:43,881 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 02:47:43,881 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 02:47:43,881 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 02:47:43,881 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 02:47:43,881 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 02:47:43,882 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 02:47:43,882 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 02:47:43,882 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.startErr0EnsuresViolation======== [2018-01-21 02:47:43,882 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 02:47:43,883 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states. [2018-01-21 02:47:43,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-01-21 02:47:43,884 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 02:47:43,885 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] [2018-01-21 02:47:43,885 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 02:47:43,885 INFO L82 PathProgramCache]: Analyzing trace with hash 964801099, now seen corresponding path program 1 times [2018-01-21 02:47:43,885 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 02:47:43,886 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 02:47:43,886 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 02:47:43,887 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 02:47:43,887 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 02:47:43,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 02:47:43,947 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 02:47:43,999 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 02:47:44,001 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 02:47:44,002 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-21 02:47:44,002 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 02:47:44,004 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-21 02:47:44,026 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-21 02:47:44,026 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-21 02:47:44,028 INFO L87 Difference]: Start difference. First operand 45 states. Second operand 2 states. [2018-01-21 02:47:44,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 02:47:44,126 INFO L93 Difference]: Finished difference Result 70 states and 79 transitions. [2018-01-21 02:47:44,126 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-21 02:47:44,128 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 20 [2018-01-21 02:47:44,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 02:47:44,139 INFO L225 Difference]: With dead ends: 70 [2018-01-21 02:47:44,139 INFO L226 Difference]: Without dead ends: 42 [2018-01-21 02:47:44,153 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 02:47:44,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-01-21 02:47:44,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-01-21 02:47:44,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-01-21 02:47:44,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2018-01-21 02:47:44,200 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 20 [2018-01-21 02:47:44,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 02:47:44,200 INFO L432 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2018-01-21 02:47:44,201 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-21 02:47:44,201 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2018-01-21 02:47:44,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-01-21 02:47:44,202 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 02:47:44,202 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] [2018-01-21 02:47:44,202 INFO L371 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 02:47:44,202 INFO L82 PathProgramCache]: Analyzing trace with hash -342950740, now seen corresponding path program 1 times [2018-01-21 02:47:44,203 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 02:47:44,204 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 02:47:44,204 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 02:47:44,204 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 02:47:44,204 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 02:47:44,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 02:47:44,238 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 02:47:44,411 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 02:47:44,412 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 02:47:44,412 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-21 02:47:44,412 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 02:47:44,414 INFO L409 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-01-21 02:47:44,414 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-01-21 02:47:44,415 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-01-21 02:47:44,415 INFO L87 Difference]: Start difference. First operand 42 states and 47 transitions. Second operand 3 states. [2018-01-21 02:47:44,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 02:47:44,455 INFO L93 Difference]: Finished difference Result 109 states and 122 transitions. [2018-01-21 02:47:44,456 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-01-21 02:47:44,456 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2018-01-21 02:47:44,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 02:47:44,461 INFO L225 Difference]: With dead ends: 109 [2018-01-21 02:47:44,461 INFO L226 Difference]: Without dead ends: 75 [2018-01-21 02:47:44,462 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-01-21 02:47:44,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-01-21 02:47:44,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 43. [2018-01-21 02:47:44,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-01-21 02:47:44,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 48 transitions. [2018-01-21 02:47:44,470 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 48 transitions. Word has length 25 [2018-01-21 02:47:44,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 02:47:44,471 INFO L432 AbstractCegarLoop]: Abstraction has 43 states and 48 transitions. [2018-01-21 02:47:44,471 INFO L433 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-01-21 02:47:44,471 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 48 transitions. [2018-01-21 02:47:44,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-01-21 02:47:44,472 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 02:47:44,473 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] [2018-01-21 02:47:44,473 INFO L371 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 02:47:44,473 INFO L82 PathProgramCache]: Analyzing trace with hash 1957871850, now seen corresponding path program 1 times [2018-01-21 02:47:44,473 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 02:47:44,474 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 02:47:44,474 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 02:47:44,474 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 02:47:44,475 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 02:47:44,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 02:47:44,498 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 02:47:44,546 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 02:47:44,547 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 02:47:44,547 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-01-21 02:47:44,547 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 02:47:44,547 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-21 02:47:44,547 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-21 02:47:44,547 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-01-21 02:47:44,548 INFO L87 Difference]: Start difference. First operand 43 states and 48 transitions. Second operand 4 states. [2018-01-21 02:47:44,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 02:47:44,602 INFO L93 Difference]: Finished difference Result 75 states and 83 transitions. [2018-01-21 02:47:44,603 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-01-21 02:47:44,603 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2018-01-21 02:47:44,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 02:47:44,604 INFO L225 Difference]: With dead ends: 75 [2018-01-21 02:47:44,605 INFO L226 Difference]: Without dead ends: 52 [2018-01-21 02:47:44,605 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-01-21 02:47:44,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2018-01-21 02:47:44,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 45. [2018-01-21 02:47:44,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-01-21 02:47:44,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 50 transitions. [2018-01-21 02:47:44,612 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 50 transitions. Word has length 25 [2018-01-21 02:47:44,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 02:47:44,612 INFO L432 AbstractCegarLoop]: Abstraction has 45 states and 50 transitions. [2018-01-21 02:47:44,613 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-21 02:47:44,613 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 50 transitions. [2018-01-21 02:47:44,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-01-21 02:47:44,614 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 02:47:44,614 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] [2018-01-21 02:47:44,614 INFO L371 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 02:47:44,615 INFO L82 PathProgramCache]: Analyzing trace with hash -92922, now seen corresponding path program 1 times [2018-01-21 02:47:44,615 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 02:47:44,616 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 02:47:44,616 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 02:47:44,616 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 02:47:44,616 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 02:47:44,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 02:47:44,644 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 02:47:44,997 WARN L146 SmtUtils]: Spent 106ms on a formula simplification. DAG size of input: 62 DAG size of output 25 [2018-01-21 02:47:45,473 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-21 02:47:45,474 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 02:47:45,474 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-21 02:47:45,475 INFO L199 CegarAbsIntRunner]: Running AI on error trace of length 31 with the following transitions: [2018-01-21 02:47:45,477 INFO L201 CegarAbsIntRunner]: [0], [1], [6], [7], [10], [18], [20], [21], [25], [28], [30], [31], [40], [42], [46], [47], [51], [53], [54], [61], [65], [78], [79], [80], [81], [83], [84], [85], [86] [2018-01-21 02:47:45,529 INFO L147 AbstractInterpreter]: Using domain VPDomain [2018-01-21 02:47:45,529 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