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/svcomp-DerefFreeMemtrack-32bit-Automizer_Taipan+AI_EQ_mostprecise.epf -i ../../../trunk/examples/svcomp/ldv-memsafety/memset3_true-valid-memsafety_true-termination.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-6b94a2f [2018-01-24 20:34:45,895 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-24 20:34:45,897 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-24 20:34:45,912 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-24 20:34:45,912 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-24 20:34:45,913 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-24 20:34:45,915 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-24 20:34:45,916 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-24 20:34:45,918 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-24 20:34:45,919 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-24 20:34:45,920 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-01-24 20:34:45,920 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-01-24 20:34:45,922 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-01-24 20:34:45,923 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-01-24 20:34:45,924 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-01-24 20:34:45,926 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-01-24 20:34:45,928 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-01-24 20:34:45,930 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-01-24 20:34:45,932 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-01-24 20:34:45,933 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-01-24 20:34:45,935 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-01-24 20:34:45,936 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-01-24 20:34:45,936 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-01-24 20:34:45,937 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-01-24 20:34:45,938 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-01-24 20:34:45,939 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-01-24 20:34:45,939 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-01-24 20:34:45,940 INFO L177 SettingsManager]: PEA to Boogie provides no preferences, ignoring... [2018-01-24 20:34:45,940 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-01-24 20:34:45,941 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-01-24 20:34:45,941 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-01-24 20:34:45,942 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/eq-bench/svcomp-DerefFreeMemtrack-32bit-Automizer_Taipan+AI_EQ_mostprecise.epf [2018-01-24 20:34:45,950 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-24 20:34:45,950 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-24 20:34:45,951 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-24 20:34:45,951 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-24 20:34:45,951 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-24 20:34:45,951 INFO L133 SettingsManager]: * Weq Fattening=true [2018-01-24 20:34:45,951 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-24 20:34:45,951 INFO L133 SettingsManager]: * Precise comparison operator=true [2018-01-24 20:34:45,951 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-24 20:34:45,952 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-24 20:34:45,952 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-24 20:34:45,952 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-24 20:34:45,952 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-24 20:34:45,952 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-24 20:34:45,953 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-24 20:34:45,953 INFO L133 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2018-01-24 20:34:45,953 INFO L133 SettingsManager]: * Bitprecise bitfields=true [2018-01-24 20:34:45,953 INFO L133 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2018-01-24 20:34:45,953 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-24 20:34:45,953 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-24 20:34:45,953 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-24 20:34:45,953 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-01-24 20:34:45,954 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-24 20:34:45,954 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-24 20:34:45,954 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-24 20:34:45,954 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-24 20:34:45,954 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-24 20:34:45,954 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-24 20:34:45,954 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-24 20:34:45,955 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-24 20:34:45,955 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-01-24 20:34:45,955 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-24 20:34:45,955 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-24 20:34:45,955 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-24 20:34:45,955 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-01-24 20:34:45,956 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-24 20:34:45,956 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-24 20:34:45,989 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-24 20:34:46,000 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-24 20:34:46,004 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-24 20:34:46,005 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-24 20:34:46,006 INFO L276 PluginConnector]: CDTParser initialized [2018-01-24 20:34:46,006 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-memsafety/memset3_true-valid-memsafety_true-termination.c [2018-01-24 20:34:46,108 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-24 20:34:46,114 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-24 20:34:46,115 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-24 20:34:46,115 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-24 20:34:46,120 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-24 20:34:46,121 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.01 08:34:46" (1/1) ... [2018-01-24 20:34:46,124 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1381cafa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 08:34:46, skipping insertion in model container [2018-01-24 20:34:46,124 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.01 08:34:46" (1/1) ... [2018-01-24 20:34:46,139 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-24 20:34:46,155 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-24 20:34:46,269 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-24 20:34:46,283 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-24 20:34:46,289 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 08:34:46 WrapperNode [2018-01-24 20:34:46,290 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-24 20:34:46,290 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-24 20:34:46,291 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-24 20:34:46,291 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-24 20:34:46,308 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 08:34:46" (1/1) ... [2018-01-24 20:34:46,308 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 08:34:46" (1/1) ... [2018-01-24 20:34:46,319 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 08:34:46" (1/1) ... [2018-01-24 20:34:46,319 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 08:34:46" (1/1) ... [2018-01-24 20:34:46,322 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 08:34:46" (1/1) ... [2018-01-24 20:34:46,325 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 08:34:46" (1/1) ... [2018-01-24 20:34:46,326 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 08:34:46" (1/1) ... [2018-01-24 20:34:46,327 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-24 20:34:46,327 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-24 20:34:46,328 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-24 20:34:46,328 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-24 20:34:46,329 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 08:34:46" (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 [2018-01-24 20:34:46,385 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-24 20:34:46,385 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-24 20:34:46,385 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-24 20:34:46,386 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-01-24 20:34:46,386 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-01-24 20:34:46,386 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-01-24 20:34:46,386 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2018-01-24 20:34:46,386 INFO L136 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2018-01-24 20:34:46,386 INFO L128 BoogieDeclarations]: Found specification of procedure memset [2018-01-24 20:34:46,386 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-24 20:34:46,387 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-24 20:34:46,387 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-24 20:34:46,473 WARN L455 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2018-01-24 20:34:46,523 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-24 20:34:46,523 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.01 08:34:46 BoogieIcfgContainer [2018-01-24 20:34:46,523 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-24 20:34:46,524 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-01-24 20:34:46,524 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-01-24 20:34:46,526 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-01-24 20:34:46,527 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.01 08:34:46" (1/3) ... [2018-01-24 20:34:46,528 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75cfaffc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.01 08:34:46, skipping insertion in model container [2018-01-24 20:34:46,528 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 08:34:46" (2/3) ... [2018-01-24 20:34:46,529 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75cfaffc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.01 08:34:46, skipping insertion in model container [2018-01-24 20:34:46,529 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.01 08:34:46" (3/3) ... [2018-01-24 20:34:46,531 INFO L105 eAbstractionObserver]: Analyzing ICFG memset3_true-valid-memsafety_true-termination.c [2018-01-24 20:34:46,538 INFO L130 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-01-24 20:34:46,545 INFO L142 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2018-01-24 20:34:46,588 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-24 20:34:46,588 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-24 20:34:46,588 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-24 20:34:46,588 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-24 20:34:46,589 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-24 20:34:46,589 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-24 20:34:46,589 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-24 20:34:46,589 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-01-24 20:34:46,590 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-24 20:34:46,610 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2018-01-24 20:34:46,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-01-24 20:34:46,616 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 20:34:46,617 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 20:34:46,617 INFO L371 AbstractCegarLoop]: === Iteration 1 === [mainErr1RequiresViolation, mainErr2EnsuresViolation, mainErr0RequiresViolation]=== [2018-01-24 20:34:46,624 INFO L82 PathProgramCache]: Analyzing trace with hash 1417793591, now seen corresponding path program 1 times [2018-01-24 20:34:46,626 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 20:34:46,684 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:34:46,684 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 20:34:46,684 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:34:46,684 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 20:34:46,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 20:34:46,727 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 20:34:46,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 20:34:46,791 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 20:34:46,791 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-24 20:34:46,791 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 20:34:46,794 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-24 20:34:46,808 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-24 20:34:46,808 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-24 20:34:46,811 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 4 states. [2018-01-24 20:34:46,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 20:34:46,905 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2018-01-24 20:34:46,906 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-01-24 20:34:46,907 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2018-01-24 20:34:46,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 20:34:46,919 INFO L225 Difference]: With dead ends: 23 [2018-01-24 20:34:46,919 INFO L226 Difference]: Without dead ends: 19 [2018-01-24 20:34:46,921 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-01-24 20:34:46,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-01-24 20:34:47,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-01-24 20:34:47,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-01-24 20:34:47,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2018-01-24 20:34:47,009 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 8 [2018-01-24 20:34:47,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 20:34:47,010 INFO L432 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2018-01-24 20:34:47,010 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-24 20:34:47,010 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2018-01-24 20:34:47,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-01-24 20:34:47,010 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 20:34:47,011 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 20:34:47,011 INFO L371 AbstractCegarLoop]: === Iteration 2 === [mainErr1RequiresViolation, mainErr2EnsuresViolation, mainErr0RequiresViolation]=== [2018-01-24 20:34:47,011 INFO L82 PathProgramCache]: Analyzing trace with hash 1417793592, now seen corresponding path program 1 times [2018-01-24 20:34:47,011 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 20:34:47,012 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:34:47,012 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 20:34:47,012 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:34:47,012 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 20:34:47,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 20:34:47,035 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 20:34:47,117 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 20:34:47,117 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 20:34:47,117 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-24 20:34:47,117 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 20:34:47,119 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-24 20:34:47,119 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-24 20:34:47,119 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-24 20:34:47,119 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 4 states. [2018-01-24 20:34:47,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 20:34:47,171 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-01-24 20:34:47,172 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-24 20:34:47,172 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2018-01-24 20:34:47,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 20:34:47,172 INFO L225 Difference]: With dead ends: 19 [2018-01-24 20:34:47,173 INFO L226 Difference]: Without dead ends: 18 [2018-01-24 20:34:47,173 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-01-24 20:34:47,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-01-24 20:34:47,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-01-24 20:34:47,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-01-24 20:34:47,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2018-01-24 20:34:47,178 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 8 [2018-01-24 20:34:47,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 20:34:47,178 INFO L432 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2018-01-24 20:34:47,178 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-24 20:34:47,178 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2018-01-24 20:34:47,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-01-24 20:34:47,179 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 20:34:47,179 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 20:34:47,179 INFO L371 AbstractCegarLoop]: === Iteration 3 === [mainErr1RequiresViolation, mainErr2EnsuresViolation, mainErr0RequiresViolation]=== [2018-01-24 20:34:47,179 INFO L82 PathProgramCache]: Analyzing trace with hash 577627260, now seen corresponding path program 1 times [2018-01-24 20:34:47,179 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 20:34:47,180 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:34:47,180 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 20:34:47,180 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:34:47,181 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 20:34:47,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 20:34:47,196 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 20:34:47,249 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 20:34:47,249 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 20:34:47,249 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-01-24 20:34:47,249 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 20:34:47,250 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-24 20:34:47,250 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-24 20:34:47,250 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-24 20:34:47,250 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 4 states. [2018-01-24 20:34:47,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 20:34:47,287 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2018-01-24 20:34:47,287 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-01-24 20:34:47,288 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2018-01-24 20:34:47,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 20:34:47,288 INFO L225 Difference]: With dead ends: 26 [2018-01-24 20:34:47,289 INFO L226 Difference]: Without dead ends: 19 [2018-01-24 20:34:47,289 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-01-24 20:34:47,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-01-24 20:34:47,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-01-24 20:34:47,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-01-24 20:34:47,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2018-01-24 20:34:47,293 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 17 [2018-01-24 20:34:47,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 20:34:47,294 INFO L432 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2018-01-24 20:34:47,294 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-24 20:34:47,294 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2018-01-24 20:34:47,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-01-24 20:34:47,295 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 20:34:47,295 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 20:34:47,295 INFO L371 AbstractCegarLoop]: === Iteration 4 === [mainErr1RequiresViolation, mainErr2EnsuresViolation, mainErr0RequiresViolation]=== [2018-01-24 20:34:47,295 INFO L82 PathProgramCache]: Analyzing trace with hash 113669371, now seen corresponding path program 1 times [2018-01-24 20:34:47,295 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 20:34:47,296 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:34:47,297 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 20:34:47,297 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:34:47,297 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 20:34:47,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 20:34:47,311 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 20:34:47,357 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 20:34:47,358 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-24 20:34:47,358 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-24 20:34:47,359 INFO L199 CegarAbsIntRunner]: Running AI on error trace of length 19 with the following transitions: [2018-01-24 20:34:47,361 INFO L201 CegarAbsIntRunner]: [0], [1], [2], [3], [7], [9], [10], [14], [15], [19], [20], [21], [23], [24], [25], [26], [28], [29] [2018-01-24 20:34:47,405 INFO L147 AbstractInterpreter]: Using domain VPDomain [2018-01-24 20:34:47,405 INFO L101 FixpointEngine]: Starting fixpoint engine with domain VPDomain (maxUnwinding=3, maxParallelStates=2) [2018-01-24 20:34:48,260 INFO L259 AbstractInterpreter]: Some error location(s) were reachable [2018-01-24 20:34:48,261 INFO L268 AbstractInterpreter]: Visited 18 different actions 22 times. Merged at 3 different actions 3 times. Never widened. Found 2 fixpoints after 2 different actions. Largest state had 15 variables. [2018-01-24 20:34:48,280 INFO L434 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-01-24 20:34:48,280 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-24 20:34:48,280 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-24 20:34:48,290 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 20:34:48,290 INFO L280 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-01-24 20:34:48,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 20:34:48,323 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-24 20:34:48,370 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 20:34:48,371 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-24 20:34:48,451 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 20:34:48,486 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-24 20:34:48,486 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 3 with cvc4 --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with cvc4 --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-01-24 20:34:48,493 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 20:34:48,493 INFO L280 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-01-24 20:34:48,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 20:34:48,528 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-24 20:34:48,533 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 20:34:48,533 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-24 20:34:48,583 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 20:34:48,584 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-01-24 20:34:48,585 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5] total 11 [2018-01-24 20:34:48,585 INFO L247 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-01-24 20:34:48,585 INFO L409 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-01-24 20:34:48,585 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-01-24 20:34:48,586 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2018-01-24 20:34:48,586 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 8 states. [2018-01-24 20:34:48,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 20:34:48,627 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2018-01-24 20:34:48,628 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-24 20:34:48,629 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 18 [2018-01-24 20:34:48,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 20:34:48,630 INFO L225 Difference]: With dead ends: 27 [2018-01-24 20:34:48,630 INFO L226 Difference]: Without dead ends: 20 [2018-01-24 20:34:48,631 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 64 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2018-01-24 20:34:48,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-01-24 20:34:48,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-01-24 20:34:48,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-01-24 20:34:48,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2018-01-24 20:34:48,638 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 18 [2018-01-24 20:34:48,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 20:34:48,638 INFO L432 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2018-01-24 20:34:48,638 INFO L433 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-01-24 20:34:48,638 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2018-01-24 20:34:48,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-01-24 20:34:48,639 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 20:34:48,639 INFO L322 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 20:34:48,639 INFO L371 AbstractCegarLoop]: === Iteration 5 === [mainErr1RequiresViolation, mainErr2EnsuresViolation, mainErr0RequiresViolation]=== [2018-01-24 20:34:48,640 INFO L82 PathProgramCache]: Analyzing trace with hash -1384123300, now seen corresponding path program 2 times [2018-01-24 20:34:48,640 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 20:34:48,641 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:34:48,643 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 20:34:48,643 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:34:48,644 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 20:34:48,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 20:34:48,657 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 20:34:48,720 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 20:34:48,721 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-24 20:34:48,721 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-24 20:34:48,721 INFO L183 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-01-24 20:34:48,721 INFO L434 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-01-24 20:34:48,722 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-24 20:34:48,722 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-24 20:34:48,734 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-24 20:34:48,735 INFO L280 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-01-24 20:34:48,745 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-24 20:34:48,752 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-24 20:34:48,754 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-24 20:34:48,822 INFO L700 Elim1Store]: detected not equals via solver [2018-01-24 20:34:48,827 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2018-01-24 20:34:48,827 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-01-24 20:34:48,842 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-01-24 20:34:48,843 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:12, output treesize:5 [2018-01-24 20:34:48,889 WARN L1029 $PredicateComparison]: unable to prove that (exists ((|main_~#cstats~2.base| Int)) (and (= (select |c_old(#valid)| |main_~#cstats~2.base|) 0) (= |c_#valid| (store |c_old(#valid)| |main_~#cstats~2.base| 0)))) is different from true [2018-01-24 20:34:48,893 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-01-24 20:34:48,893 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-24 20:34:48,929 WARN L1007 $PredicateComparison]: unable to prove that (forall ((|v_main_~#cstats~2.base_9| Int)) (or (= |c_old(#valid)| (store |c_#valid| |v_main_~#cstats~2.base_9| 0)) (not (= (select |c_#valid| |v_main_~#cstats~2.base_9|) 0)))) is different from false [2018-01-24 20:34:48,933 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-01-24 20:34:48,963 INFO L320 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-01-24 20:34:48,963 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [6] total 12 [2018-01-24 20:34:48,963 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 20:34:48,963 INFO L409 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-01-24 20:34:48,964 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-01-24 20:34:48,964 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=68, Unknown=2, NotChecked=34, Total=132 [2018-01-24 20:34:48,964 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 6 states. [2018-01-24 20:34:49,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 20:34:49,051 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2018-01-24 20:34:49,051 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-01-24 20:34:49,051 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2018-01-24 20:34:49,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 20:34:49,051 INFO L225 Difference]: With dead ends: 20 [2018-01-24 20:34:49,051 INFO L226 Difference]: Without dead ends: 0 [2018-01-24 20:34:49,052 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=103, Unknown=2, NotChecked=42, Total=182 [2018-01-24 20:34:49,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-01-24 20:34:49,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-01-24 20:34:49,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-01-24 20:34:49,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-01-24 20:34:49,053 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 19 [2018-01-24 20:34:49,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 20:34:49,053 INFO L432 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-01-24 20:34:49,053 INFO L433 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-01-24 20:34:49,054 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-01-24 20:34:49,054 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-01-24 20:34:49,060 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-01-24 20:34:49,154 INFO L401 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(lines 1 31) no Hoare annotation was computed. [2018-01-24 20:34:49,154 INFO L397 ceAbstractionStarter]: At program point ULTIMATE.initENTRY(lines 1 31) the Hoare annotation is: (= |#valid| |old(#valid)|) [2018-01-24 20:34:49,154 INFO L401 ceAbstractionStarter]: For program point ULTIMATE.initFINAL(lines 1 31) no Hoare annotation was computed. [2018-01-24 20:34:49,155 INFO L404 ceAbstractionStarter]: At program point #Ultimate.C_memsetENTRY(line -1) the Hoare annotation is: true [2018-01-24 20:34:49,155 INFO L404 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-01-24 20:34:49,155 INFO L401 ceAbstractionStarter]: For program point #Ultimate.C_memsetFINAL(line -1) no Hoare annotation was computed. [2018-01-24 20:34:49,155 INFO L401 ceAbstractionStarter]: For program point $Ultimate##0(line -1) no Hoare annotation was computed. [2018-01-24 20:34:49,155 INFO L401 ceAbstractionStarter]: For program point #Ultimate.C_memsetEXIT(line -1) no Hoare annotation was computed. [2018-01-24 20:34:49,155 INFO L404 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(lines 1 31) the Hoare annotation is: true [2018-01-24 20:34:49,155 INFO L401 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(lines 1 31) no Hoare annotation was computed. [2018-01-24 20:34:49,155 INFO L404 ceAbstractionStarter]: At program point L1(lines 1 31) the Hoare annotation is: true [2018-01-24 20:34:49,156 INFO L401 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(lines 1 31) no Hoare annotation was computed. [2018-01-24 20:34:49,156 INFO L397 ceAbstractionStarter]: At program point mainENTRY(lines 25 31) the Hoare annotation is: (= |#valid| |old(#valid)|) [2018-01-24 20:34:49,156 INFO L401 ceAbstractionStarter]: For program point L26(line 26) no Hoare annotation was computed. [2018-01-24 20:34:49,156 INFO L397 ceAbstractionStarter]: At program point L29(line 29) the Hoare annotation is: (and (= 0 |main_~#cstats~2.offset|) (= 1 (select |#valid| main_~point~2.base)) (= |#valid| (store |old(#valid)| |main_~#cstats~2.base| 1)) (= (select |old(#valid)| |main_~#cstats~2.base|) 0) (= 80 (select |#length| |main_~#cstats~2.base|)) (= (select |#length| main_~point~2.base) 80) (= main_~point~2.offset 0)) [2018-01-24 20:34:49,156 INFO L401 ceAbstractionStarter]: For program point mainErr1RequiresViolation(line -1) no Hoare annotation was computed. [2018-01-24 20:34:49,156 INFO L401 ceAbstractionStarter]: For program point L26'(line 26) no Hoare annotation was computed. [2018-01-24 20:34:49,157 INFO L401 ceAbstractionStarter]: For program point L26''(line 26) no Hoare annotation was computed. [2018-01-24 20:34:49,157 INFO L401 ceAbstractionStarter]: For program point L29'(line 29) no Hoare annotation was computed. [2018-01-24 20:34:49,157 INFO L401 ceAbstractionStarter]: For program point mainFINAL(lines 25 31) no Hoare annotation was computed. [2018-01-24 20:34:49,157 INFO L401 ceAbstractionStarter]: For program point mainErr2EnsuresViolation(lines 25 31) no Hoare annotation was computed. [2018-01-24 20:34:49,157 INFO L401 ceAbstractionStarter]: For program point mainErr0RequiresViolation(line -1) no Hoare annotation was computed. [2018-01-24 20:34:49,157 INFO L401 ceAbstractionStarter]: For program point mainEXIT(lines 25 31) no Hoare annotation was computed. [2018-01-24 20:34:49,162 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.01 08:34:49 BoogieIcfgContainer [2018-01-24 20:34:49,162 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-01-24 20:34:49,163 INFO L168 Benchmark]: Toolchain (without parser) took 3054.39 ms. Allocated memory was 304.1 MB in the beginning and 518.5 MB in the end (delta: 214.4 MB). Free memory was 263.4 MB in the beginning and 369.6 MB in the end (delta: -106.2 MB). Peak memory consumption was 108.2 MB. Max. memory is 5.3 GB. [2018-01-24 20:34:49,164 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 304.1 MB. Free memory is still 267.4 MB. There was no memory consumed. Max. memory is 5.3 GB. [2018-01-24 20:34:49,164 INFO L168 Benchmark]: CACSL2BoogieTranslator took 175.26 ms. Allocated memory is still 304.1 MB. Free memory was 261.4 MB in the beginning and 253.4 MB in the end (delta: 8.0 MB). Peak memory consumption was 8.0 MB. Max. memory is 5.3 GB. [2018-01-24 20:34:49,165 INFO L168 Benchmark]: Boogie Preprocessor took 36.78 ms. Allocated memory is still 304.1 MB. Free memory is still 253.4 MB. There was no memory consumed. Max. memory is 5.3 GB. [2018-01-24 20:34:49,165 INFO L168 Benchmark]: RCFGBuilder took 196.00 ms. Allocated memory is still 304.1 MB. Free memory was 253.4 MB in the beginning and 240.9 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 5.3 GB. [2018-01-24 20:34:49,165 INFO L168 Benchmark]: TraceAbstraction took 2638.49 ms. Allocated memory was 304.1 MB in the beginning and 518.5 MB in the end (delta: 214.4 MB). Free memory was 240.9 MB in the beginning and 369.6 MB in the end (delta: -128.7 MB). Peak memory consumption was 85.7 MB. Max. memory is 5.3 GB. [2018-01-24 20:34:49,167 INFO L344 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 ms. Allocated memory is still 304.1 MB. Free memory is still 267.4 MB. There was no memory consumed. Max. memory is 5.3 GB. * CACSL2BoogieTranslator took 175.26 ms. Allocated memory is still 304.1 MB. Free memory was 261.4 MB in the beginning and 253.4 MB in the end (delta: 8.0 MB). Peak memory consumption was 8.0 MB. Max. memory is 5.3 GB. * Boogie Preprocessor took 36.78 ms. Allocated memory is still 304.1 MB. Free memory is still 253.4 MB. There was no memory consumed. Max. memory is 5.3 GB. * RCFGBuilder took 196.00 ms. Allocated memory is still 304.1 MB. Free memory was 253.4 MB in the beginning and 240.9 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 5.3 GB. * TraceAbstraction took 2638.49 ms. Allocated memory was 304.1 MB in the beginning and 518.5 MB in the end (delta: 214.4 MB). Free memory was 240.9 MB in the beginning and 369.6 MB in the end (delta: -128.7 MB). Peak memory consumption was 85.7 MB. Max. memory is 5.3 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: - StatisticsResult: ArrayEqualityDomainStatistics #Locations : 17 LocStat_MAX_WEQGRAPH_SIZE : 2 LocStat_MAX_SIZEOF_WEQEDGELABEL : 1 LocStat_NO_SUPPORTING_EQUALITIES : 124 LocStat_NO_SUPPORTING_DISEQUALITIES : 29 LocStat_NO_DISJUNCTIONS : -34 LocStat_MAX_NO_DISJUNCTIONS : -1 #Transitions : 24 TransStat_MAX_WEQGRAPH_SIZE : 2 TransStat_MAX_SIZEOF_WEQEDGELABEL : 1 TransStat_NO_SUPPORTING_EQUALITIES : 33 TransStat_NO_SUPPORTING_DISEQUALITIES : 5 TransStat_NO_DISJUNCTIONS : 24 TransStat_MAX_NO_DISJUNCTIONS : 1 - StatisticsResult: EqConstraintFactoryStatistics CONJOIN_DISJUNCTIVE(MILLISECONDS) : 0.450722 RENAME_VARIABLES(MILLISECONDS) : 0.098958 UNFREEZE(MILLISECONDS) : 0.000000 CONJOIN(MILLISECONDS) : 0.401185 PROJECTAWAY(MILLISECONDS) : 0.090463 ADD_WEAK_EQUALITY(MILLISECONDS) : 0.102320 DISJOIN(MILLISECONDS) : 0.000000 RENAME_VARIABLES_DISJUNCTIVE(MILLISECONDS) : 0.137045 ADD_EQUALITY(MILLISECONDS) : 0.045416 DISJOIN_DISJUNCTIVE(MILLISECONDS) : 0.000000 ADD_DISEQUALITY(MILLISECONDS) : 0.018211 #CONJOIN_DISJUNCTIVE : 34 #RENAME_VARIABLES : 59 #UNFREEZE : 0 #CONJOIN : 61 #PROJECTAWAY : 58 #ADD_WEAK_EQUALITY : 4 #DISJOIN : 0 #RENAME_VARIABLES_DISJUNCTIVE : 59 #ADD_EQUALITY : 33 #DISJOIN_DISJUNCTIVE : 0 #ADD_DISEQUALITY : 2 * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 25]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - AllSpecificationsHoldResult: All specifications hold 3 specifications checked. All of them hold - InvariantResult [Line: -1]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 23 locations, 3 error locations. SAFE Result, 2.5s OverallTime, 5 OverallIterations, 2 TraceHistogramMax, 0.3s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 78 SDtfs, 26 SDslu, 107 SDs, 0 SdLazy, 62 SolverSat, 11 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 134 GetRequests, 100 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=23occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.9s AbstIntTime, 1 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 7 PreInvPairs, 9 NumberOfFragments, 43 HoareAnnotationTreeSize, 7 FomulaSimplifications, 27 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 39 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 125 NumberOfCodeBlocks, 123 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 169 ConstructedInterpolants, 10 QuantifiedInterpolants, 7158 SizeOfPredicates, 3 NumberOfNonLiveVariables, 204 ConjunctsInSsa, 14 ConjunctsInUnsatCore, 11 InterpolantComputations, 5 PerfectInterpolantSequences, 6/14 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, REUSE_STATISTICS: No data available RESULT: Ultimate proved your program to be correct! Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/memset3_true-valid-memsafety_true-termination.c_svcomp-DerefFreeMemtrack-32bit-Automizer_Taipan+AI_EQ_mostprecise.epf_AutomizerC.xml/Csv-Benchmark-0-2018-01-24_20-34-49-177.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/memset3_true-valid-memsafety_true-termination.c_svcomp-DerefFreeMemtrack-32bit-Automizer_Taipan+AI_EQ_mostprecise.epf_AutomizerC.xml/Csv-VPDomainBenchmark-0-2018-01-24_20-34-49-177.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/memset3_true-valid-memsafety_true-termination.c_svcomp-DerefFreeMemtrack-32bit-Automizer_Taipan+AI_EQ_mostprecise.epf_AutomizerC.xml/Csv-BenchmarkWithCounters-0-2018-01-24_20-34-49-177.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/memset3_true-valid-memsafety_true-termination.c_svcomp-DerefFreeMemtrack-32bit-Automizer_Taipan+AI_EQ_mostprecise.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-0-2018-01-24_20-34-49-177.csv Received shutdown request...