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.epf -i ../../../trunk/examples/svcomp/ldv-memsafety/memset2_true-valid-memsafety_true-termination.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-6b94a2f [2018-01-24 15:51:56,413 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-24 15:51:56,414 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-24 15:51:56,430 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-24 15:51:56,431 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-24 15:51:56,432 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-24 15:51:56,433 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-24 15:51:56,435 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-24 15:51:56,437 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-24 15:51:56,438 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-24 15:51:56,439 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-01-24 15:51:56,440 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-01-24 15:51:56,440 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-01-24 15:51:56,442 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-01-24 15:51:56,443 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-01-24 15:51:56,445 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-01-24 15:51:56,448 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-01-24 15:51:56,450 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-01-24 15:51:56,451 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-01-24 15:51:56,452 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-01-24 15:51:56,455 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-01-24 15:51:56,455 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-01-24 15:51:56,455 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-01-24 15:51:56,456 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-01-24 15:51:56,457 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-01-24 15:51:56,458 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-01-24 15:51:56,459 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-01-24 15:51:56,460 INFO L177 SettingsManager]: PEA to Boogie provides no preferences, ignoring... [2018-01-24 15:51:56,460 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-01-24 15:51:56,460 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-01-24 15:51:56,461 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-01-24 15:51:56,461 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.epf [2018-01-24 15:51:56,470 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-24 15:51:56,470 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-24 15:51:56,471 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-24 15:51:56,471 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-24 15:51:56,471 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-24 15:51:56,471 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-24 15:51:56,472 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-24 15:51:56,472 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-24 15:51:56,472 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-24 15:51:56,472 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-24 15:51:56,473 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-24 15:51:56,473 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-24 15:51:56,473 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-24 15:51:56,473 INFO L133 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2018-01-24 15:51:56,473 INFO L133 SettingsManager]: * Bitprecise bitfields=true [2018-01-24 15:51:56,473 INFO L133 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2018-01-24 15:51:56,473 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-24 15:51:56,474 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-24 15:51:56,474 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-24 15:51:56,474 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-01-24 15:51:56,474 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-24 15:51:56,474 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-24 15:51:56,474 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-24 15:51:56,475 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-24 15:51:56,475 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-24 15:51:56,475 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-24 15:51:56,475 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-24 15:51:56,475 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-24 15:51:56,476 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-01-24 15:51:56,476 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-24 15:51:56,476 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-24 15:51:56,476 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-24 15:51:56,476 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-01-24 15:51:56,477 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-24 15:51:56,477 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-24 15:51:56,510 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-24 15:51:56,522 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-24 15:51:56,525 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-24 15:51:56,526 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-24 15:51:56,527 INFO L276 PluginConnector]: CDTParser initialized [2018-01-24 15:51:56,527 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-memsafety/memset2_true-valid-memsafety_true-termination.c [2018-01-24 15:51:56,628 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-24 15:51:56,632 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-24 15:51:56,633 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-24 15:51:56,633 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-24 15:51:56,639 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-24 15:51:56,640 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.01 03:51:56" (1/1) ... [2018-01-24 15:51:56,664 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@23f18f74 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 03:51:56, skipping insertion in model container [2018-01-24 15:51:56,664 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.01 03:51:56" (1/1) ... [2018-01-24 15:51:56,678 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-24 15:51:56,692 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-24 15:51:56,803 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-24 15:51:56,817 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-24 15:51:56,823 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 03:51:56 WrapperNode [2018-01-24 15:51:56,823 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-24 15:51:56,824 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-24 15:51:56,824 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-24 15:51:56,824 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-24 15:51:56,841 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 03:51:56" (1/1) ... [2018-01-24 15:51:56,841 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 03:51:56" (1/1) ... [2018-01-24 15:51:56,852 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 03:51:56" (1/1) ... [2018-01-24 15:51:56,852 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 03:51:56" (1/1) ... [2018-01-24 15:51:56,856 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 03:51:56" (1/1) ... [2018-01-24 15:51:56,859 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 03:51:56" (1/1) ... [2018-01-24 15:51:56,860 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 03:51:56" (1/1) ... [2018-01-24 15:51:56,862 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-24 15:51:56,863 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-24 15:51:56,863 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-24 15:51:56,863 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-24 15:51:56,864 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 03:51:56" (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 15:51:56,911 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-24 15:51:56,911 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-24 15:51:56,911 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-24 15:51:56,911 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-01-24 15:51:56,911 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-01-24 15:51:56,911 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-01-24 15:51:56,912 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2018-01-24 15:51:56,912 INFO L136 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2018-01-24 15:51:56,912 INFO L128 BoogieDeclarations]: Found specification of procedure memset [2018-01-24 15:51:56,912 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-24 15:51:56,912 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-24 15:51:56,912 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-24 15:51:56,987 WARN L455 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2018-01-24 15:51:57,048 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-24 15:51:57,048 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.01 03:51:57 BoogieIcfgContainer [2018-01-24 15:51:57,049 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-24 15:51:57,050 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-01-24 15:51:57,050 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-01-24 15:51:57,052 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-01-24 15:51:57,052 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.01 03:51:56" (1/3) ... [2018-01-24 15:51:57,054 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a5c2fe2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.01 03:51:57, skipping insertion in model container [2018-01-24 15:51:57,054 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 03:51:56" (2/3) ... [2018-01-24 15:51:57,054 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a5c2fe2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.01 03:51:57, skipping insertion in model container [2018-01-24 15:51:57,055 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.01 03:51:57" (3/3) ... [2018-01-24 15:51:57,057 INFO L105 eAbstractionObserver]: Analyzing ICFG memset2_true-valid-memsafety_true-termination.c [2018-01-24 15:51:57,066 INFO L130 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-01-24 15:51:57,074 INFO L142 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2018-01-24 15:51:57,117 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-24 15:51:57,117 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-24 15:51:57,117 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-24 15:51:57,117 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-24 15:51:57,118 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-24 15:51:57,118 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-24 15:51:57,118 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-24 15:51:57,118 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-01-24 15:51:57,119 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-24 15:51:57,141 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2018-01-24 15:51:57,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-01-24 15:51:57,148 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 15:51:57,149 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-01-24 15:51:57,149 INFO L371 AbstractCegarLoop]: === Iteration 1 === [mainErr1RequiresViolation, mainErr2EnsuresViolation, mainErr0RequiresViolation]=== [2018-01-24 15:51:57,156 INFO L82 PathProgramCache]: Analyzing trace with hash 682221498, now seen corresponding path program 1 times [2018-01-24 15:51:57,159 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 15:51:57,212 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 15:51:57,212 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 15:51:57,212 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 15:51:57,213 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 15:51:57,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 15:51:57,258 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 15:51:57,307 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 15:51:57,309 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 15:51:57,309 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-24 15:51:57,309 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 15:51:57,311 INFO L409 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-01-24 15:51:57,322 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-01-24 15:51:57,322 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-01-24 15:51:57,324 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 3 states. [2018-01-24 15:51:57,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 15:51:57,372 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2018-01-24 15:51:57,373 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-01-24 15:51:57,374 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2018-01-24 15:51:57,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 15:51:57,383 INFO L225 Difference]: With dead ends: 22 [2018-01-24 15:51:57,384 INFO L226 Difference]: Without dead ends: 18 [2018-01-24 15:51:57,387 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-01-24 15:51:57,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-01-24 15:51:57,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-01-24 15:51:57,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-01-24 15:51:57,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2018-01-24 15:51:57,418 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 7 [2018-01-24 15:51:57,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 15:51:57,419 INFO L432 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2018-01-24 15:51:57,419 INFO L433 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-01-24 15:51:57,419 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2018-01-24 15:51:57,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-01-24 15:51:57,420 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 15:51:57,420 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-01-24 15:51:57,420 INFO L371 AbstractCegarLoop]: === Iteration 2 === [mainErr1RequiresViolation, mainErr2EnsuresViolation, mainErr0RequiresViolation]=== [2018-01-24 15:51:57,420 INFO L82 PathProgramCache]: Analyzing trace with hash 682221499, now seen corresponding path program 1 times [2018-01-24 15:51:57,420 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 15:51:57,421 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 15:51:57,421 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 15:51:57,422 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 15:51:57,422 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 15:51:57,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 15:51:57,507 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 15:51:57,570 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 15:51:57,571 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 15:51:57,571 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-24 15:51:57,571 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 15:51:57,573 INFO L409 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-01-24 15:51:57,573 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-01-24 15:51:57,573 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-01-24 15:51:57,573 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 3 states. [2018-01-24 15:51:57,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 15:51:57,593 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2018-01-24 15:51:57,594 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-01-24 15:51:57,594 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2018-01-24 15:51:57,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 15:51:57,594 INFO L225 Difference]: With dead ends: 18 [2018-01-24 15:51:57,594 INFO L226 Difference]: Without dead ends: 17 [2018-01-24 15:51:57,595 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-01-24 15:51:57,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-01-24 15:51:57,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-01-24 15:51:57,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-01-24 15:51:57,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-01-24 15:51:57,599 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 7 [2018-01-24 15:51:57,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 15:51:57,599 INFO L432 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-01-24 15:51:57,599 INFO L433 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-01-24 15:51:57,600 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-01-24 15:51:57,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-01-24 15:51:57,600 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 15:51:57,600 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 15:51:57,600 INFO L371 AbstractCegarLoop]: === Iteration 3 === [mainErr1RequiresViolation, mainErr2EnsuresViolation, mainErr0RequiresViolation]=== [2018-01-24 15:51:57,601 INFO L82 PathProgramCache]: Analyzing trace with hash -898824040, now seen corresponding path program 1 times [2018-01-24 15:51:57,601 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 15:51:57,602 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 15:51:57,602 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 15:51:57,602 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 15:51:57,602 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 15:51:57,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 15:51:57,618 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 15:51:57,665 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 15:51:57,665 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 15:51:57,665 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-01-24 15:51:57,665 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 15:51:57,665 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-24 15:51:57,666 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-24 15:51:57,666 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-24 15:51:57,666 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 4 states. [2018-01-24 15:51:57,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 15:51:57,692 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-01-24 15:51:57,693 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-01-24 15:51:57,693 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2018-01-24 15:51:57,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 15:51:57,694 INFO L225 Difference]: With dead ends: 25 [2018-01-24 15:51:57,694 INFO L226 Difference]: Without dead ends: 18 [2018-01-24 15:51:57,695 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 15:51:57,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-01-24 15:51:57,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-01-24 15:51:57,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-01-24 15:51:57,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2018-01-24 15:51:57,699 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2018-01-24 15:51:57,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 15:51:57,699 INFO L432 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2018-01-24 15:51:57,700 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-24 15:51:57,700 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2018-01-24 15:51:57,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-01-24 15:51:57,700 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 15:51:57,701 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 15:51:57,701 INFO L371 AbstractCegarLoop]: === Iteration 4 === [mainErr1RequiresViolation, mainErr2EnsuresViolation, mainErr0RequiresViolation]=== [2018-01-24 15:51:57,701 INFO L82 PathProgramCache]: Analyzing trace with hash 1616948477, now seen corresponding path program 1 times [2018-01-24 15:51:57,701 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 15:51:57,702 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 15:51:57,703 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 15:51:57,703 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 15:51:57,703 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 15:51:57,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 15:51:57,718 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 15:51:57,778 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 15:51:57,779 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-24 15:51:57,779 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-24 15:51:57,780 INFO L199 CegarAbsIntRunner]: Running AI on error trace of length 18 with the following transitions: [2018-01-24 15:51:57,782 INFO L201 CegarAbsIntRunner]: [0], [1], [2], [3], [7], [9], [10], [14], [18], [19], [20], [22], [23], [24], [25], [27], [28] [2018-01-24 15:51:57,831 INFO L147 AbstractInterpreter]: Using domain VPDomain [2018-01-24 15:51:57,831 INFO L101 FixpointEngine]: Starting fixpoint engine with domain VPDomain (maxUnwinding=3, maxParallelStates=2) [2018-01-24 15:51:58,086 INFO L259 AbstractInterpreter]: Some error location(s) were reachable [2018-01-24 15:51:58,088 INFO L268 AbstractInterpreter]: Visited 17 different actions 21 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 15:51:58,103 INFO L434 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-01-24 15:51:58,103 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-24 15:51:58,103 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 15:51:58,118 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 15:51:58,118 INFO L280 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-01-24 15:51:58,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 15:51:58,152 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-24 15:51:58,232 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 15:51:58,233 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-24 15:51:58,316 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 15:51:58,351 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-24 15:51:58,351 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 15:51:58,358 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 15:51:58,358 INFO L280 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-01-24 15:51:58,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 15:51:58,391 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-24 15:51:58,396 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 15:51:58,397 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-24 15:51:58,482 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 15:51:58,484 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-01-24 15:51:58,484 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5] total 11 [2018-01-24 15:51:58,485 INFO L247 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-01-24 15:51:58,485 INFO L409 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-01-24 15:51:58,485 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-01-24 15:51:58,486 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2018-01-24 15:51:58,486 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 8 states. [2018-01-24 15:51:58,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 15:51:58,513 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2018-01-24 15:51:58,514 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-24 15:51:58,514 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 17 [2018-01-24 15:51:58,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 15:51:58,515 INFO L225 Difference]: With dead ends: 26 [2018-01-24 15:51:58,515 INFO L226 Difference]: Without dead ends: 19 [2018-01-24 15:51:58,516 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 60 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 15:51:58,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-01-24 15:51:58,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-01-24 15:51:58,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-01-24 15:51:58,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2018-01-24 15:51:58,520 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 17 [2018-01-24 15:51:58,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 15:51:58,520 INFO L432 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2018-01-24 15:51:58,520 INFO L433 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-01-24 15:51:58,520 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2018-01-24 15:51:58,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-01-24 15:51:58,521 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 15:51:58,521 INFO L322 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 15:51:58,521 INFO L371 AbstractCegarLoop]: === Iteration 5 === [mainErr1RequiresViolation, mainErr2EnsuresViolation, mainErr0RequiresViolation]=== [2018-01-24 15:51:58,522 INFO L82 PathProgramCache]: Analyzing trace with hash -1998482120, now seen corresponding path program 2 times [2018-01-24 15:51:58,522 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 15:51:58,523 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 15:51:58,523 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 15:51:58,523 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 15:51:58,523 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 15:51:58,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 15:51:58,539 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 15:51:58,602 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 15:51:58,603 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-24 15:51:58,603 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-24 15:51:58,603 INFO L183 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-01-24 15:51:58,603 INFO L434 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-01-24 15:51:58,603 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-24 15:51:58,603 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 15:51:58,615 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-24 15:51:58,615 INFO L280 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-01-24 15:51:58,627 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-24 15:51:58,636 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-24 15:51:58,639 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-24 15:51:58,694 INFO L700 Elim1Store]: detected not equals via solver [2018-01-24 15:51:58,700 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 15:51:58,701 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-01-24 15:51:58,711 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 15:51:58,711 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:12, output treesize:5 [2018-01-24 15:51:58,755 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 15:51:58,758 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 15:51:58,759 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-24 15:51:58,778 WARN L1007 $PredicateComparison]: unable to prove that (forall ((|v_main_~#cstats~2.base_13| Int)) (or (= |c_old(#valid)| (store |c_#valid| |v_main_~#cstats~2.base_13| 0)) (not (= (select |c_#valid| |v_main_~#cstats~2.base_13|) 0)))) is different from false [2018-01-24 15:51:58,784 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 15:51:58,818 INFO L320 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-01-24 15:51:58,819 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [6] total 12 [2018-01-24 15:51:58,819 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 15:51:58,819 INFO L409 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-01-24 15:51:58,820 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-01-24 15:51:58,820 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=68, Unknown=2, NotChecked=34, Total=132 [2018-01-24 15:51:58,820 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 6 states. [2018-01-24 15:51:58,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 15:51:58,886 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-01-24 15:51:58,887 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-01-24 15:51:58,887 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2018-01-24 15:51:58,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 15:51:58,888 INFO L225 Difference]: With dead ends: 19 [2018-01-24 15:51:58,888 INFO L226 Difference]: Without dead ends: 0 [2018-01-24 15:51:58,889 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 30 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 15:51:58,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-01-24 15:51:58,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-01-24 15:51:58,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-01-24 15:51:58,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-01-24 15:51:58,890 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 18 [2018-01-24 15:51:58,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 15:51:58,890 INFO L432 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-01-24 15:51:58,890 INFO L433 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-01-24 15:51:58,890 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-01-24 15:51:58,891 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-01-24 15:51:58,895 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-01-24 15:51:58,959 INFO L401 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(lines 1 24) no Hoare annotation was computed. [2018-01-24 15:51:58,960 INFO L397 ceAbstractionStarter]: At program point ULTIMATE.initENTRY(lines 1 24) the Hoare annotation is: (= |#valid| |old(#valid)|) [2018-01-24 15:51:58,960 INFO L401 ceAbstractionStarter]: For program point ULTIMATE.initFINAL(lines 1 24) no Hoare annotation was computed. [2018-01-24 15:51:58,960 INFO L404 ceAbstractionStarter]: At program point #Ultimate.C_memsetENTRY(line -1) the Hoare annotation is: true [2018-01-24 15:51:58,960 INFO L404 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-01-24 15:51:58,960 INFO L401 ceAbstractionStarter]: For program point #Ultimate.C_memsetFINAL(line -1) no Hoare annotation was computed. [2018-01-24 15:51:58,961 INFO L401 ceAbstractionStarter]: For program point $Ultimate##0(line -1) no Hoare annotation was computed. [2018-01-24 15:51:58,961 INFO L401 ceAbstractionStarter]: For program point #Ultimate.C_memsetEXIT(line -1) no Hoare annotation was computed. [2018-01-24 15:51:58,961 INFO L404 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(lines 1 24) the Hoare annotation is: true [2018-01-24 15:51:58,961 INFO L401 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(lines 1 24) no Hoare annotation was computed. [2018-01-24 15:51:58,961 INFO L404 ceAbstractionStarter]: At program point L1(lines 1 24) the Hoare annotation is: true [2018-01-24 15:51:58,961 INFO L401 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(lines 1 24) no Hoare annotation was computed. [2018-01-24 15:51:58,962 INFO L397 ceAbstractionStarter]: At program point mainENTRY(lines 20 24) the Hoare annotation is: (= |#valid| |old(#valid)|) [2018-01-24 15:51:58,962 INFO L401 ceAbstractionStarter]: For program point mainErr1RequiresViolation(line -1) no Hoare annotation was computed. [2018-01-24 15:51:58,962 INFO L401 ceAbstractionStarter]: For program point mainFINAL(lines 20 24) no Hoare annotation was computed. [2018-01-24 15:51:58,962 INFO L401 ceAbstractionStarter]: For program point mainErr2EnsuresViolation(lines 20 24) no Hoare annotation was computed. [2018-01-24 15:51:58,962 INFO L397 ceAbstractionStarter]: At program point L21(line 21) the Hoare annotation is: (and (= |main_~#cstats~2.offset| 0) (= (select |#length| |main_~#cstats~2.base|) 40) (= |#valid| (store |old(#valid)| |main_~#cstats~2.base| 1)) (= (select |old(#valid)| |main_~#cstats~2.base|) 0)) [2018-01-24 15:51:58,962 INFO L401 ceAbstractionStarter]: For program point L22(line 22) no Hoare annotation was computed. [2018-01-24 15:51:58,963 INFO L401 ceAbstractionStarter]: For program point mainErr0RequiresViolation(line -1) no Hoare annotation was computed. [2018-01-24 15:51:58,963 INFO L401 ceAbstractionStarter]: For program point L21''(line 21) no Hoare annotation was computed. [2018-01-24 15:51:58,963 INFO L401 ceAbstractionStarter]: For program point L21'(line 21) no Hoare annotation was computed. [2018-01-24 15:51:58,963 INFO L401 ceAbstractionStarter]: For program point mainEXIT(lines 20 24) no Hoare annotation was computed. [2018-01-24 15:51:58,969 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.01 03:51:58 BoogieIcfgContainer [2018-01-24 15:51:58,969 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-01-24 15:51:58,970 INFO L168 Benchmark]: Toolchain (without parser) took 2341.10 ms. Allocated memory was 298.3 MB in the beginning and 451.4 MB in the end (delta: 153.1 MB). Free memory was 259.4 MB in the beginning and 298.5 MB in the end (delta: -39.2 MB). Peak memory consumption was 113.9 MB. Max. memory is 5.3 GB. [2018-01-24 15:51:58,971 INFO L168 Benchmark]: CDTParser took 0.13 ms. Allocated memory is still 298.3 MB. Free memory is still 264.3 MB. There was no memory consumed. Max. memory is 5.3 GB. [2018-01-24 15:51:58,971 INFO L168 Benchmark]: CACSL2BoogieTranslator took 190.46 ms. Allocated memory is still 298.3 MB. Free memory was 258.4 MB in the beginning and 251.3 MB in the end (delta: 7.1 MB). Peak memory consumption was 7.1 MB. Max. memory is 5.3 GB. [2018-01-24 15:51:58,972 INFO L168 Benchmark]: Boogie Preprocessor took 38.49 ms. Allocated memory is still 298.3 MB. Free memory was 251.3 MB in the beginning and 249.3 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 5.3 GB. [2018-01-24 15:51:58,972 INFO L168 Benchmark]: RCFGBuilder took 186.04 ms. Allocated memory is still 298.3 MB. Free memory was 249.3 MB in the beginning and 236.7 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 5.3 GB. [2018-01-24 15:51:58,972 INFO L168 Benchmark]: TraceAbstraction took 1919.44 ms. Allocated memory was 298.3 MB in the beginning and 451.4 MB in the end (delta: 153.1 MB). Free memory was 236.7 MB in the beginning and 298.5 MB in the end (delta: -61.8 MB). Peak memory consumption was 91.3 MB. Max. memory is 5.3 GB. [2018-01-24 15:51:58,974 INFO L344 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13 ms. Allocated memory is still 298.3 MB. Free memory is still 264.3 MB. There was no memory consumed. Max. memory is 5.3 GB. * CACSL2BoogieTranslator took 190.46 ms. Allocated memory is still 298.3 MB. Free memory was 258.4 MB in the beginning and 251.3 MB in the end (delta: 7.1 MB). Peak memory consumption was 7.1 MB. Max. memory is 5.3 GB. * Boogie Preprocessor took 38.49 ms. Allocated memory is still 298.3 MB. Free memory was 251.3 MB in the beginning and 249.3 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 5.3 GB. * RCFGBuilder took 186.04 ms. Allocated memory is still 298.3 MB. Free memory was 249.3 MB in the beginning and 236.7 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 5.3 GB. * TraceAbstraction took 1919.44 ms. Allocated memory was 298.3 MB in the beginning and 451.4 MB in the end (delta: 153.1 MB). Free memory was 236.7 MB in the beginning and 298.5 MB in the end (delta: -61.8 MB). Peak memory consumption was 91.3 MB. Max. memory is 5.3 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: - StatisticsResult: ArrayEqualityDomainStatistics #Locations : 16 LocStat_MAX_WEQGRAPH_SIZE : 2 LocStat_MAX_SIZEOF_WEQEDGELABEL : 1 LocStat_NO_SUPPORTING_EQUALITIES : 100 LocStat_NO_SUPPORTING_DISEQUALITIES : 23 LocStat_NO_DISJUNCTIONS : -32 LocStat_MAX_NO_DISJUNCTIONS : -1 #Transitions : 23 TransStat_MAX_WEQGRAPH_SIZE : 2 TransStat_MAX_SIZEOF_WEQEDGELABEL : 1 TransStat_NO_SUPPORTING_EQUALITIES : 31 TransStat_NO_SUPPORTING_DISEQUALITIES : 5 TransStat_NO_DISJUNCTIONS : 23 TransStat_MAX_NO_DISJUNCTIONS : 1 - StatisticsResult: EqConstraintFactoryStatistics CONJOIN_DISJUNCTIVE(MILLISECONDS) : 0.343251 RENAME_VARIABLES(MILLISECONDS) : 0.152265 UNFREEZE(MILLISECONDS) : 0.000000 CONJOIN(MILLISECONDS) : 0.290479 PROJECTAWAY(MILLISECONDS) : 0.097792 ADD_WEAK_EQUALITY(MILLISECONDS) : 0.146678 DISJOIN(MILLISECONDS) : 0.000000 RENAME_VARIABLES_DISJUNCTIVE(MILLISECONDS) : 0.194183 ADD_EQUALITY(MILLISECONDS) : 0.088126 DISJOIN_DISJUNCTIVE(MILLISECONDS) : 0.000000 ADD_DISEQUALITY(MILLISECONDS) : 0.013925 #CONJOIN_DISJUNCTIVE : 32 #RENAME_VARIABLES : 57 #UNFREEZE : 0 #CONJOIN : 59 #PROJECTAWAY : 56 #ADD_WEAK_EQUALITY : 4 #DISJOIN : 0 #RENAME_VARIABLES_DISJUNCTIVE : 57 #ADD_EQUALITY : 31 #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: 20]: 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, 22 locations, 3 error locations. SAFE Result, 1.8s OverallTime, 5 OverallIterations, 2 TraceHistogramMax, 0.2s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 76 SDtfs, 17 SDslu, 84 SDs, 0 SdLazy, 51 SolverSat, 7 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 124 GetRequests, 94 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=22occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.3s 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, 30 HoareAnnotationTreeSize, 7 FomulaSimplifications, 27 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 39 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 117 NumberOfCodeBlocks, 115 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 158 ConstructedInterpolants, 10 QuantifiedInterpolants, 6224 SizeOfPredicates, 3 NumberOfNonLiveVariables, 192 ConjunctsInSsa, 16 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/memset2_true-valid-memsafety_true-termination.c_svcomp-DerefFreeMemtrack-32bit-Automizer_Taipan+AI_EQ.epf_AutomizerC.xml/Csv-Benchmark-0-2018-01-24_15-51-58-986.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/memset2_true-valid-memsafety_true-termination.c_svcomp-DerefFreeMemtrack-32bit-Automizer_Taipan+AI_EQ.epf_AutomizerC.xml/Csv-VPDomainBenchmark-0-2018-01-24_15-51-58-986.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/memset2_true-valid-memsafety_true-termination.c_svcomp-DerefFreeMemtrack-32bit-Automizer_Taipan+AI_EQ.epf_AutomizerC.xml/Csv-BenchmarkWithCounters-0-2018-01-24_15-51-58-986.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/memset2_true-valid-memsafety_true-termination.c_svcomp-DerefFreeMemtrack-32bit-Automizer_Taipan+AI_EQ.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-0-2018-01-24_15-51-58-986.csv Received shutdown request...