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/knapsack_alloca_unsafe_false-valid-deref.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-2f49842 [2018-01-21 02:45:23,445 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-21 02:45:23,484 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-21 02:45:23,502 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-21 02:45:23,502 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-21 02:45:23,503 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-21 02:45:23,505 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-21 02:45:23,507 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-21 02:45:23,509 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-21 02:45:23,510 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-21 02:45:23,511 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-01-21 02:45:23,512 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-01-21 02:45:23,513 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-01-21 02:45:23,514 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-01-21 02:45:23,515 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-01-21 02:45:23,522 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-01-21 02:45:23,525 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-01-21 02:45:23,527 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-01-21 02:45:23,528 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-01-21 02:45:23,530 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-01-21 02:45:23,532 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-01-21 02:45:23,539 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 02:45:23,557 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-21 02:45:23,557 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-21 02:45:23,558 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-21 02:45:23,558 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-21 02:45:23,558 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-21 02:45:23,559 INFO L133 SettingsManager]: * Weq Fattening=true [2018-01-21 02:45:23,559 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-21 02:45:23,559 INFO L133 SettingsManager]: * Precise comparison operator=true [2018-01-21 02:45:23,559 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-21 02:45:23,560 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-21 02:45:23,560 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-21 02:45:23,561 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-21 02:45:23,561 INFO L133 SettingsManager]: * Check allocation purity=true [2018-01-21 02:45:23,561 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-21 02:45:23,561 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-21 02:45:23,561 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-21 02:45:23,561 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-01-21 02:45:23,562 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-21 02:45:23,562 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-01-21 02:45:23,562 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-21 02:45:23,562 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-01-21 02:45:23,562 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-01-21 02:45:23,563 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-21 02:45:23,563 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-01-21 02:45:23,563 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-21 02:45:23,563 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-21 02:45:23,564 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-21 02:45:23,564 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-21 02:45:23,564 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-21 02:45:23,564 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-21 02:45:23,564 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-21 02:45:23,565 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-21 02:45:23,565 INFO L133 SettingsManager]: * Stop after first violation was found=false [2018-01-21 02:45:23,567 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-01-21 02:45:23,567 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-21 02:45:23,568 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-21 02:45:23,568 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-21 02:45:23,568 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-01-21 02:45:23,569 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-21 02:45:23,569 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-21 02:45:23,632 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-21 02:45:23,643 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-21 02:45:23,648 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-21 02:45:23,649 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-21 02:45:23,650 INFO L276 PluginConnector]: CDTParser initialized [2018-01-21 02:45:23,650 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-memsafety/knapsack_alloca_unsafe_false-valid-deref.i [2018-01-21 02:45:23,836 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-21 02:45:23,841 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-21 02:45:23,842 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-21 02:45:23,843 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-21 02:45:23,850 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-21 02:45:23,851 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.01 02:45:23" (1/1) ... [2018-01-21 02:45:23,855 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1e99cb12 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 02:45:23, skipping insertion in model container [2018-01-21 02:45:23,855 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.01 02:45:23" (1/1) ... [2018-01-21 02:45:23,876 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-21 02:45:23,918 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-21 02:45:24,057 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-21 02:45:24,081 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-21 02:45:24,090 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 02:45:24 WrapperNode [2018-01-21 02:45:24,090 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-21 02:45:24,091 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-21 02:45:24,091 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-21 02:45:24,091 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-21 02:45:24,105 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 02:45:24" (1/1) ... [2018-01-21 02:45:24,105 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 02:45:24" (1/1) ... [2018-01-21 02:45:24,115 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 02:45:24" (1/1) ... [2018-01-21 02:45:24,115 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 02:45:24" (1/1) ... [2018-01-21 02:45:24,121 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 02:45:24" (1/1) ... [2018-01-21 02:45:24,124 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 02:45:24" (1/1) ... [2018-01-21 02:45:24,126 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 02:45:24" (1/1) ... [2018-01-21 02:45:24,128 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-21 02:45:24,129 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-21 02:45:24,129 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-21 02:45:24,129 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-21 02:45:24,130 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 02:45:24" (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 02:45:24,180 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-21 02:45:24,181 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-21 02:45:24,181 INFO L136 BoogieDeclarations]: Found implementation of procedure knapsack [2018-01-21 02:45:24,181 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-21 02:45:24,181 INFO L128 BoogieDeclarations]: Found specification of procedure write~int [2018-01-21 02:45:24,181 INFO L128 BoogieDeclarations]: Found specification of procedure read~int [2018-01-21 02:45:24,181 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-01-21 02:45:24,181 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-01-21 02:45:24,181 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-01-21 02:45:24,181 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-01-21 02:45:24,182 INFO L128 BoogieDeclarations]: Found specification of procedure knapsack [2018-01-21 02:45:24,182 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-21 02:45:24,182 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-21 02:45:24,182 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-21 02:45:24,457 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-21 02:45:24,458 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.01 02:45:24 BoogieIcfgContainer [2018-01-21 02:45:24,458 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-21 02:45:24,458 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-01-21 02:45:24,459 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-01-21 02:45:24,460 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-01-21 02:45:24,461 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.01 02:45:23" (1/3) ... [2018-01-21 02:45:24,462 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f614061 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.01 02:45:24, skipping insertion in model container [2018-01-21 02:45:24,462 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 02:45:24" (2/3) ... [2018-01-21 02:45:24,462 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f614061 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.01 02:45:24, skipping insertion in model container [2018-01-21 02:45:24,462 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.01 02:45:24" (3/3) ... [2018-01-21 02:45:24,464 INFO L105 eAbstractionObserver]: Analyzing ICFG knapsack_alloca_unsafe_false-valid-deref.i [2018-01-21 02:45:24,471 INFO L130 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-01-21 02:45:24,478 INFO L142 ceAbstractionStarter]: Appying trace abstraction to program that has 4 error locations. [2018-01-21 02:45:24,530 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 02:45:24,530 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 02:45:24,530 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 02:45:24,530 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 02:45:24,531 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 02:45:24,531 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 02:45:24,531 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 02:45:24,531 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.initErr0EnsuresViolation======== [2018-01-21 02:45:24,532 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 02:45:24,568 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states. [2018-01-21 02:45:24,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-01-21 02:45:24,579 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 02:45:24,583 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-01-21 02:45:24,583 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.initErr0EnsuresViolation]=== [2018-01-21 02:45:24,594 INFO L82 PathProgramCache]: Analyzing trace with hash 118205, now seen corresponding path program 1 times [2018-01-21 02:45:24,597 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 02:45:24,662 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 02:45:24,662 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 02:45:24,663 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 02:45:24,663 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 02:45:24,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 02:45:24,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 02:45:24,742 INFO L381 BasicCegarLoop]: Counterexample might be feasible [2018-01-21 02:45:24,753 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 02:45:24,761 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 02:45:24,762 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 02:45:24,762 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 02:45:24,762 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 02:45:24,762 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 02:45:24,762 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 02:45:24,762 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 02:45:24,763 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == knapsackErr0EnsuresViolation======== [2018-01-21 02:45:24,763 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 02:45:24,766 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states. [2018-01-21 02:45:24,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-01-21 02:45:24,767 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 02:45:24,768 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 02:45:24,768 INFO L371 AbstractCegarLoop]: === Iteration 1 === [knapsackErr0EnsuresViolation]=== [2018-01-21 02:45:24,768 INFO L82 PathProgramCache]: Analyzing trace with hash -1365807540, now seen corresponding path program 1 times [2018-01-21 02:45:24,769 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 02:45:24,770 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 02:45:24,771 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 02:45:24,771 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 02:45:24,771 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 02:45:24,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 02:45:24,828 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 02:45:24,920 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 02:45:24,923 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 02:45:24,923 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-21 02:45:24,923 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 02:45:24,926 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-21 02:45:24,945 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-21 02:45:24,946 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-21 02:45:24,949 INFO L87 Difference]: Start difference. First operand 56 states. Second operand 2 states. [2018-01-21 02:45:25,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 02:45:25,078 INFO L93 Difference]: Finished difference Result 92 states and 105 transitions. [2018-01-21 02:45:25,078 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-21 02:45:25,080 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 20 [2018-01-21 02:45:25,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 02:45:25,089 INFO L225 Difference]: With dead ends: 92 [2018-01-21 02:45:25,089 INFO L226 Difference]: Without dead ends: 0 [2018-01-21 02:45:25,093 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 02:45:25,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-01-21 02:45:25,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-01-21 02:45:25,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-01-21 02:45:25,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-01-21 02:45:25,124 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 20 [2018-01-21 02:45:25,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 02:45:25,124 INFO L432 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-01-21 02:45:25,125 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-21 02:45:25,125 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-01-21 02:45:25,125 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-01-21 02:45:25,129 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 02:45:25,129 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 02:45:25,129 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 02:45:25,129 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 02:45:25,129 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 02:45:25,129 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 02:45:25,130 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 02:45:25,130 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.startErr0EnsuresViolation======== [2018-01-21 02:45:25,130 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 02:45:25,132 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states. [2018-01-21 02:45:25,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-01-21 02:45:25,134 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 02:45:25,134 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] [2018-01-21 02:45:25,134 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 02:45:25,135 INFO L82 PathProgramCache]: Analyzing trace with hash -1369908330, now seen corresponding path program 1 times [2018-01-21 02:45:25,135 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 02:45:25,136 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 02:45:25,136 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 02:45:25,136 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 02:45:25,137 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 02:45:25,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 02:45:25,166 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 02:45:25,208 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 02:45:25,209 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 02:45:25,209 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-21 02:45:25,209 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 02:45:25,210 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-21 02:45:25,210 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-21 02:45:25,210 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-21 02:45:25,210 INFO L87 Difference]: Start difference. First operand 56 states. Second operand 2 states. [2018-01-21 02:45:25,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 02:45:25,217 INFO L93 Difference]: Finished difference Result 92 states and 105 transitions. [2018-01-21 02:45:25,217 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-21 02:45:25,217 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 33 [2018-01-21 02:45:25,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 02:45:25,222 INFO L225 Difference]: With dead ends: 92 [2018-01-21 02:45:25,222 INFO L226 Difference]: Without dead ends: 52 [2018-01-21 02:45:25,223 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 02:45:25,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2018-01-21 02:45:25,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2018-01-21 02:45:25,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-01-21 02:45:25,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 57 transitions. [2018-01-21 02:45:25,241 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 57 transitions. Word has length 33 [2018-01-21 02:45:25,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 02:45:25,242 INFO L432 AbstractCegarLoop]: Abstraction has 52 states and 57 transitions. [2018-01-21 02:45:25,242 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-21 02:45:25,242 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 57 transitions. [2018-01-21 02:45:25,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-01-21 02:45:25,244 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 02:45:25,244 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] [2018-01-21 02:45:25,244 INFO L371 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 02:45:25,244 INFO L82 PathProgramCache]: Analyzing trace with hash -1841804872, now seen corresponding path program 1 times [2018-01-21 02:45:25,245 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 02:45:25,246 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 02:45:25,246 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 02:45:25,246 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 02:45:25,246 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 02:45:25,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 02:45:25,277 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 02:45:25,387 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 02:45:25,388 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 02:45:25,388 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-21 02:45:25,388 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 02:45:25,390 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-21 02:45:25,391 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-21 02:45:25,391 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-01-21 02:45:25,391 INFO L87 Difference]: Start difference. First operand 52 states and 57 transitions. Second operand 5 states. [2018-01-21 02:45:25,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 02:45:25,579 INFO L93 Difference]: Finished difference Result 86 states and 94 transitions. [2018-01-21 02:45:25,579 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-21 02:45:25,579 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 34 [2018-01-21 02:45:25,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 02:45:25,581 INFO L225 Difference]: With dead ends: 86 [2018-01-21 02:45:25,581 INFO L226 Difference]: Without dead ends: 71 [2018-01-21 02:45:25,586 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-01-21 02:45:25,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-01-21 02:45:25,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 54. [2018-01-21 02:45:25,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-01-21 02:45:25,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 59 transitions. [2018-01-21 02:45:25,604 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 59 transitions. Word has length 34 [2018-01-21 02:45:25,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 02:45:25,605 INFO L432 AbstractCegarLoop]: Abstraction has 54 states and 59 transitions. [2018-01-21 02:45:25,605 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-21 02:45:25,605 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 59 transitions. [2018-01-21 02:45:25,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-01-21 02:45:25,607 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 02:45:25,607 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] [2018-01-21 02:45:25,607 INFO L371 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 02:45:25,607 INFO L82 PathProgramCache]: Analyzing trace with hash -1329272689, now seen corresponding path program 1 times [2018-01-21 02:45:25,608 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 02:45:25,609 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 02:45:25,609 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 02:45:25,609 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 02:45:25,609 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 02:45:25,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 02:45:25,633 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 02:45:25,770 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 02:45:25,770 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 02:45:25,770 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-21 02:45:25,772 INFO L199 CegarAbsIntRunner]: Running AI on error trace of length 40 with the following transitions: [2018-01-21 02:45:25,774 INFO L201 CegarAbsIntRunner]: [0], [1], [3], [7], [10], [12], [16], [19], [49], [53], [58], [59], [64], [68], [72], [73], [74], [75], [76], [77], [78], [79], [81], [82], [83], [84], [85], [86], [87], [88], [89], [90], [92], [93], [94], [95], [96], [97] [2018-01-21 02:45:25,849 INFO L147 AbstractInterpreter]: Using domain VPDomain [2018-01-21 02:45:25,849 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