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/memset2_true-valid-memsafety_true-termination.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-6b94a2f [2018-01-24 20:34:43,256 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-24 20:34:43,258 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-24 20:34:43,272 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-24 20:34:43,272 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-24 20:34:43,273 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-24 20:34:43,274 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-24 20:34:43,276 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-24 20:34:43,277 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-24 20:34:43,278 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-24 20:34:43,279 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-01-24 20:34:43,279 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-01-24 20:34:43,280 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-01-24 20:34:43,282 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-01-24 20:34:43,283 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-01-24 20:34:43,285 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-01-24 20:34:43,287 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-01-24 20:34:43,289 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-01-24 20:34:43,291 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-01-24 20:34:43,292 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-01-24 20:34:43,294 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-01-24 20:34:43,295 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-01-24 20:34:43,295 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-01-24 20:34:43,296 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-01-24 20:34:43,297 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-01-24 20:34:43,298 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-01-24 20:34:43,298 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-01-24 20:34:43,299 INFO L177 SettingsManager]: PEA to Boogie provides no preferences, ignoring... [2018-01-24 20:34:43,299 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-01-24 20:34:43,299 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-01-24 20:34:43,300 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-01-24 20:34:43,300 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 20:34:43,310 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-24 20:34:43,311 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-24 20:34:43,312 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-24 20:34:43,312 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-24 20:34:43,312 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-24 20:34:43,312 INFO L133 SettingsManager]: * Weq Fattening=true [2018-01-24 20:34:43,313 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-24 20:34:43,313 INFO L133 SettingsManager]: * Precise comparison operator=true [2018-01-24 20:34:43,313 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-24 20:34:43,314 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-24 20:34:43,314 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-24 20:34:43,314 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-24 20:34:43,314 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-24 20:34:43,314 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-24 20:34:43,315 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-24 20:34:43,315 INFO L133 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2018-01-24 20:34:43,315 INFO L133 SettingsManager]: * Bitprecise bitfields=true [2018-01-24 20:34:43,315 INFO L133 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2018-01-24 20:34:43,315 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-24 20:34:43,316 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-24 20:34:43,316 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-24 20:34:43,316 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-01-24 20:34:43,316 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-24 20:34:43,316 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-24 20:34:43,317 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-24 20:34:43,317 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-24 20:34:43,317 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-24 20:34:43,317 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-24 20:34:43,318 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-24 20:34:43,318 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-24 20:34:43,318 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-01-24 20:34:43,318 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-24 20:34:43,318 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-24 20:34:43,319 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-24 20:34:43,319 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-01-24 20:34:43,320 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-24 20:34:43,320 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-24 20:34:43,357 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-24 20:34:43,371 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-24 20:34:43,376 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-24 20:34:43,378 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-24 20:34:43,378 INFO L276 PluginConnector]: CDTParser initialized [2018-01-24 20:34:43,379 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-memsafety/memset2_true-valid-memsafety_true-termination.c [2018-01-24 20:34:43,514 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-24 20:34:43,520 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-24 20:34:43,521 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-24 20:34:43,521 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-24 20:34:43,529 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-24 20:34:43,530 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.01 08:34:43" (1/1) ... [2018-01-24 20:34:43,534 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@eaf07e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 08:34:43, skipping insertion in model container [2018-01-24 20:34:43,534 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.01 08:34:43" (1/1) ... [2018-01-24 20:34:43,553 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-24 20:34:43,570 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-24 20:34:43,699 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-24 20:34:43,713 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-24 20:34:43,719 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 08:34:43 WrapperNode [2018-01-24 20:34:43,719 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-24 20:34:43,720 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-24 20:34:43,720 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-24 20:34:43,720 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-24 20:34:43,734 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 08:34:43" (1/1) ... [2018-01-24 20:34:43,734 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 08:34:43" (1/1) ... [2018-01-24 20:34:43,743 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 08:34:43" (1/1) ... [2018-01-24 20:34:43,743 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 08:34:43" (1/1) ... [2018-01-24 20:34:43,745 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 08:34:43" (1/1) ... [2018-01-24 20:34:43,747 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 08:34:43" (1/1) ... [2018-01-24 20:34:43,748 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 08:34:43" (1/1) ... [2018-01-24 20:34:43,749 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-24 20:34:43,750 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-24 20:34:43,750 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-24 20:34:43,750 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-24 20:34:43,751 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 08:34:43" (1/1) ... No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-24 20:34:43,797 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-24 20:34:43,798 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-24 20:34:43,798 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-24 20:34:43,798 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-01-24 20:34:43,798 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-01-24 20:34:43,798 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-01-24 20:34:43,798 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2018-01-24 20:34:43,799 INFO L136 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2018-01-24 20:34:43,799 INFO L128 BoogieDeclarations]: Found specification of procedure memset [2018-01-24 20:34:43,799 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-24 20:34:43,799 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-24 20:34:43,799 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-24 20:34:43,875 WARN L455 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2018-01-24 20:34:43,943 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-24 20:34:43,943 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.01 08:34:43 BoogieIcfgContainer [2018-01-24 20:34:43,944 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-24 20:34:43,945 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-01-24 20:34:43,945 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-01-24 20:34:43,947 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-01-24 20:34:43,947 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.01 08:34:43" (1/3) ... [2018-01-24 20:34:43,949 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b587b3a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.01 08:34:43, skipping insertion in model container [2018-01-24 20:34:43,949 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 08:34:43" (2/3) ... [2018-01-24 20:34:43,949 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b587b3a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.01 08:34:43, skipping insertion in model container [2018-01-24 20:34:43,949 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.01 08:34:43" (3/3) ... [2018-01-24 20:34:43,951 INFO L105 eAbstractionObserver]: Analyzing ICFG memset2_true-valid-memsafety_true-termination.c [2018-01-24 20:34:43,961 INFO L130 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-01-24 20:34:43,969 INFO L142 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2018-01-24 20:34:44,017 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-24 20:34:44,017 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-24 20:34:44,017 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-24 20:34:44,017 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-24 20:34:44,017 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-24 20:34:44,018 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-24 20:34:44,018 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-24 20:34:44,018 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-01-24 20:34:44,019 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-24 20:34:44,038 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2018-01-24 20:34:44,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-01-24 20:34:44,043 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 20:34:44,043 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-01-24 20:34:44,043 INFO L371 AbstractCegarLoop]: === Iteration 1 === [mainErr1RequiresViolation, mainErr2EnsuresViolation, mainErr0RequiresViolation]=== [2018-01-24 20:34:44,047 INFO L82 PathProgramCache]: Analyzing trace with hash 682221498, now seen corresponding path program 1 times [2018-01-24 20:34:44,050 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 20:34:44,091 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:34:44,092 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 20:34:44,092 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:34:44,092 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 20:34:44,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 20:34:44,137 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 20:34:44,186 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 20:34:44,188 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 20:34:44,189 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-24 20:34:44,189 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 20:34:44,191 INFO L409 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-01-24 20:34:44,205 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-01-24 20:34:44,206 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-01-24 20:34:44,209 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 3 states. [2018-01-24 20:34:44,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 20:34:44,252 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2018-01-24 20:34:44,252 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-01-24 20:34:44,253 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2018-01-24 20:34:44,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 20:34:44,262 INFO L225 Difference]: With dead ends: 22 [2018-01-24 20:34:44,263 INFO L226 Difference]: Without dead ends: 18 [2018-01-24 20:34:44,266 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 20:34:44,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-01-24 20:34:44,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-01-24 20:34:44,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-01-24 20:34:44,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2018-01-24 20:34:44,294 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 7 [2018-01-24 20:34:44,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 20:34:44,295 INFO L432 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2018-01-24 20:34:44,295 INFO L433 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-01-24 20:34:44,295 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2018-01-24 20:34:44,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-01-24 20:34:44,295 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 20:34:44,295 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-01-24 20:34:44,295 INFO L371 AbstractCegarLoop]: === Iteration 2 === [mainErr1RequiresViolation, mainErr2EnsuresViolation, mainErr0RequiresViolation]=== [2018-01-24 20:34:44,296 INFO L82 PathProgramCache]: Analyzing trace with hash 682221499, now seen corresponding path program 1 times [2018-01-24 20:34:44,296 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 20:34:44,297 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:34:44,297 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 20:34:44,297 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:34:44,297 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 20:34:44,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 20:34:44,375 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 20:34:44,438 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 20:34:44,438 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 20:34:44,438 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-24 20:34:44,438 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 20:34:44,440 INFO L409 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-01-24 20:34:44,440 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-01-24 20:34:44,440 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-01-24 20:34:44,441 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 3 states. [2018-01-24 20:34:44,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 20:34:44,454 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2018-01-24 20:34:44,455 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-01-24 20:34:44,455 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2018-01-24 20:34:44,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 20:34:44,456 INFO L225 Difference]: With dead ends: 18 [2018-01-24 20:34:44,456 INFO L226 Difference]: Without dead ends: 17 [2018-01-24 20:34:44,457 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 20:34:44,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-01-24 20:34:44,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-01-24 20:34:44,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-01-24 20:34:44,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-01-24 20:34:44,461 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 7 [2018-01-24 20:34:44,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 20:34:44,461 INFO L432 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-01-24 20:34:44,461 INFO L433 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-01-24 20:34:44,462 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-01-24 20:34:44,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-01-24 20:34:44,462 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 20:34:44,462 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 20:34:44,463 INFO L371 AbstractCegarLoop]: === Iteration 3 === [mainErr1RequiresViolation, mainErr2EnsuresViolation, mainErr0RequiresViolation]=== [2018-01-24 20:34:44,463 INFO L82 PathProgramCache]: Analyzing trace with hash -898824040, now seen corresponding path program 1 times [2018-01-24 20:34:44,463 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 20:34:44,464 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:34:44,464 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 20:34:44,464 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:34:44,465 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 20:34:44,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 20:34:44,478 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 20:34:44,526 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 20:34:44,526 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 20:34:44,526 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-01-24 20:34:44,526 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 20:34:44,527 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-24 20:34:44,527 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-24 20:34:44,527 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-24 20:34:44,527 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 4 states. [2018-01-24 20:34:44,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 20:34:44,554 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-01-24 20:34:44,554 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-01-24 20:34:44,554 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2018-01-24 20:34:44,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 20:34:44,555 INFO L225 Difference]: With dead ends: 25 [2018-01-24 20:34:44,555 INFO L226 Difference]: Without dead ends: 18 [2018-01-24 20:34:44,556 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 20:34:44,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-01-24 20:34:44,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-01-24 20:34:44,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-01-24 20:34:44,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2018-01-24 20:34:44,560 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2018-01-24 20:34:44,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 20:34:44,560 INFO L432 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2018-01-24 20:34:44,560 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-24 20:34:44,561 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2018-01-24 20:34:44,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-01-24 20:34:44,561 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 20:34:44,561 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 20:34:44,561 INFO L371 AbstractCegarLoop]: === Iteration 4 === [mainErr1RequiresViolation, mainErr2EnsuresViolation, mainErr0RequiresViolation]=== [2018-01-24 20:34:44,562 INFO L82 PathProgramCache]: Analyzing trace with hash 1616948477, now seen corresponding path program 1 times [2018-01-24 20:34:44,562 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 20:34:44,563 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:34:44,563 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 20:34:44,563 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:34:44,564 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 20:34:44,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 20:34:44,579 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 20:34:44,635 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 20:34:44,635 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-24 20:34:44,635 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-24 20:34:44,636 INFO L199 CegarAbsIntRunner]: Running AI on error trace of length 18 with the following transitions: [2018-01-24 20:34:44,637 INFO L201 CegarAbsIntRunner]: [0], [1], [2], [3], [7], [9], [10], [14], [18], [19], [20], [22], [23], [24], [25], [27], [28] [2018-01-24 20:34:44,685 INFO L147 AbstractInterpreter]: Using domain VPDomain [2018-01-24 20:34:44,685 INFO L101 FixpointEngine]: Starting fixpoint engine with domain VPDomain (maxUnwinding=3, maxParallelStates=2) [2018-01-24 20:34:45,467 INFO L259 AbstractInterpreter]: Some error location(s) were reachable [2018-01-24 20:34:45,468 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 20:34:45,492 INFO L434 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-01-24 20:34:45,492 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-24 20:34:45,492 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 20:34:45,501 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 20:34:45,502 INFO L280 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-01-24 20:34:45,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 20:34:45,538 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-24 20:34:45,582 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 20:34:45,582 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-24 20:34:45,698 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 20:34:45,719 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-24 20:34:45,720 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 20:34:45,724 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 20:34:45,724 INFO L280 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-01-24 20:34:45,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 20:34:45,755 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-24 20:34:45,761 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 20:34:45,761 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-24 20:34:45,814 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 20:34:45,816 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-01-24 20:34:45,816 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5] total 11 [2018-01-24 20:34:45,816 INFO L247 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-01-24 20:34:45,817 INFO L409 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-01-24 20:34:45,817 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-01-24 20:34:45,818 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2018-01-24 20:34:45,818 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 8 states. [2018-01-24 20:34:45,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 20:34:45,849 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2018-01-24 20:34:45,849 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-24 20:34:45,849 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 17 [2018-01-24 20:34:45,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 20:34:45,850 INFO L225 Difference]: With dead ends: 26 [2018-01-24 20:34:45,851 INFO L226 Difference]: Without dead ends: 19 [2018-01-24 20:34:45,851 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 20:34:45,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-01-24 20:34:45,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-01-24 20:34:45,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-01-24 20:34:45,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2018-01-24 20:34:45,855 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 17 [2018-01-24 20:34:45,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 20:34:45,856 INFO L432 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2018-01-24 20:34:45,856 INFO L433 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-01-24 20:34:45,856 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2018-01-24 20:34:45,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-01-24 20:34:45,857 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 20:34:45,857 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 20:34:45,857 INFO L371 AbstractCegarLoop]: === Iteration 5 === [mainErr1RequiresViolation, mainErr2EnsuresViolation, mainErr0RequiresViolation]=== [2018-01-24 20:34:45,857 INFO L82 PathProgramCache]: Analyzing trace with hash -1998482120, now seen corresponding path program 2 times [2018-01-24 20:34:45,857 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 20:34:45,858 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:34:45,859 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 20:34:45,859 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:34:45,859 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 20:34:45,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 20:34:45,872 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 20:34:45,934 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 20:34:45,934 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-24 20:34:45,934 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-24 20:34:45,934 INFO L183 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-01-24 20:34:45,934 INFO L434 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-01-24 20:34:45,934 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-24 20:34:45,935 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 20:34:45,939 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-24 20:34:45,940 INFO L280 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-01-24 20:34:45,950 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-24 20:34:45,952 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-24 20:34:45,954 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-24 20:34:45,992 INFO L700 Elim1Store]: detected not equals via solver [2018-01-24 20:34:45,998 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 20:34:45,998 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-01-24 20:34:46,000 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 20:34:46,001 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:12, output treesize:5 [2018-01-24 20:34:46,076 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 20:34:46,080 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 20:34:46,081 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-24 20:34:46,114 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 20:34:46,131 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 20:34:46,164 INFO L320 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-01-24 20:34:46,164 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [6] total 12 [2018-01-24 20:34:46,164 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 20:34:46,164 INFO L409 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-01-24 20:34:46,165 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-01-24 20:34:46,165 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=68, Unknown=2, NotChecked=34, Total=132 [2018-01-24 20:34:46,165 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 6 states. [2018-01-24 20:34:46,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 20:34:46,319 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-01-24 20:34:46,320 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-01-24 20:34:46,320 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2018-01-24 20:34:46,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 20:34:46,321 INFO L225 Difference]: With dead ends: 19 [2018-01-24 20:34:46,321 INFO L226 Difference]: Without dead ends: 0 [2018-01-24 20:34:46,321 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=103, Unknown=2, NotChecked=42, Total=182 [2018-01-24 20:34:46,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-01-24 20:34:46,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-01-24 20:34:46,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-01-24 20:34:46,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-01-24 20:34:46,323 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 18 [2018-01-24 20:34:46,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 20:34:46,323 INFO L432 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-01-24 20:34:46,323 INFO L433 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-01-24 20:34:46,323 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-01-24 20:34:46,323 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-01-24 20:34:46,328 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-01-24 20:34:46,413 INFO L401 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(lines 1 24) no Hoare annotation was computed. [2018-01-24 20:34:46,413 INFO L397 ceAbstractionStarter]: At program point ULTIMATE.initENTRY(lines 1 24) the Hoare annotation is: (= |#valid| |old(#valid)|) [2018-01-24 20:34:46,413 INFO L401 ceAbstractionStarter]: For program point ULTIMATE.initFINAL(lines 1 24) no Hoare annotation was computed. [2018-01-24 20:34:46,413 INFO L404 ceAbstractionStarter]: At program point #Ultimate.C_memsetENTRY(line -1) the Hoare annotation is: true [2018-01-24 20:34:46,413 INFO L404 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-01-24 20:34:46,414 INFO L401 ceAbstractionStarter]: For program point #Ultimate.C_memsetFINAL(line -1) no Hoare annotation was computed. [2018-01-24 20:34:46,414 INFO L401 ceAbstractionStarter]: For program point $Ultimate##0(line -1) no Hoare annotation was computed. [2018-01-24 20:34:46,414 INFO L401 ceAbstractionStarter]: For program point #Ultimate.C_memsetEXIT(line -1) no Hoare annotation was computed. [2018-01-24 20:34:46,414 INFO L404 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(lines 1 24) the Hoare annotation is: true [2018-01-24 20:34:46,414 INFO L401 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(lines 1 24) no Hoare annotation was computed. [2018-01-24 20:34:46,414 INFO L404 ceAbstractionStarter]: At program point L1(lines 1 24) the Hoare annotation is: true [2018-01-24 20:34:46,414 INFO L401 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(lines 1 24) no Hoare annotation was computed. [2018-01-24 20:34:46,415 INFO L397 ceAbstractionStarter]: At program point mainENTRY(lines 20 24) the Hoare annotation is: (= |#valid| |old(#valid)|) [2018-01-24 20:34:46,415 INFO L401 ceAbstractionStarter]: For program point mainErr1RequiresViolation(line -1) no Hoare annotation was computed. [2018-01-24 20:34:46,415 INFO L401 ceAbstractionStarter]: For program point mainFINAL(lines 20 24) no Hoare annotation was computed. [2018-01-24 20:34:46,415 INFO L401 ceAbstractionStarter]: For program point mainErr2EnsuresViolation(lines 20 24) no Hoare annotation was computed. [2018-01-24 20:34:46,415 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 20:34:46,415 INFO L401 ceAbstractionStarter]: For program point L22(line 22) no Hoare annotation was computed. [2018-01-24 20:34:46,415 INFO L401 ceAbstractionStarter]: For program point mainErr0RequiresViolation(line -1) no Hoare annotation was computed. [2018-01-24 20:34:46,415 INFO L401 ceAbstractionStarter]: For program point L21''(line 21) no Hoare annotation was computed. [2018-01-24 20:34:46,415 INFO L401 ceAbstractionStarter]: For program point L21'(line 21) no Hoare annotation was computed. [2018-01-24 20:34:46,416 INFO L401 ceAbstractionStarter]: For program point mainEXIT(lines 20 24) no Hoare annotation was computed. [2018-01-24 20:34:46,421 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.01 08:34:46 BoogieIcfgContainer [2018-01-24 20:34:46,421 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-01-24 20:34:46,422 INFO L168 Benchmark]: Toolchain (without parser) took 2907.94 ms. Allocated memory was 308.8 MB in the beginning and 513.8 MB in the end (delta: 205.0 MB). Free memory was 269.7 MB in the beginning and 422.6 MB in the end (delta: -152.9 MB). Peak memory consumption was 52.1 MB. Max. memory is 5.3 GB. [2018-01-24 20:34:46,423 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 308.8 MB. Free memory is still 274.7 MB. There was no memory consumed. Max. memory is 5.3 GB. [2018-01-24 20:34:46,423 INFO L168 Benchmark]: CACSL2BoogieTranslator took 198.55 ms. Allocated memory is still 308.8 MB. Free memory was 268.7 MB in the beginning and 261.6 MB in the end (delta: 7.1 MB). Peak memory consumption was 7.1 MB. Max. memory is 5.3 GB. [2018-01-24 20:34:46,424 INFO L168 Benchmark]: Boogie Preprocessor took 29.48 ms. Allocated memory is still 308.8 MB. Free memory was 261.6 MB in the beginning and 259.6 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 5.3 GB. [2018-01-24 20:34:46,424 INFO L168 Benchmark]: RCFGBuilder took 194.05 ms. Allocated memory is still 308.8 MB. Free memory was 259.6 MB in the beginning and 247.5 MB in the end (delta: 12.1 MB). Peak memory consumption was 12.1 MB. Max. memory is 5.3 GB. [2018-01-24 20:34:46,424 INFO L168 Benchmark]: TraceAbstraction took 2476.67 ms. Allocated memory was 308.8 MB in the beginning and 513.8 MB in the end (delta: 205.0 MB). Free memory was 246.5 MB in the beginning and 422.6 MB in the end (delta: -176.1 MB). Peak memory consumption was 28.9 MB. Max. memory is 5.3 GB. [2018-01-24 20:34:46,426 INFO L344 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 308.8 MB. Free memory is still 274.7 MB. There was no memory consumed. Max. memory is 5.3 GB. * CACSL2BoogieTranslator took 198.55 ms. Allocated memory is still 308.8 MB. Free memory was 268.7 MB in the beginning and 261.6 MB in the end (delta: 7.1 MB). Peak memory consumption was 7.1 MB. Max. memory is 5.3 GB. * Boogie Preprocessor took 29.48 ms. Allocated memory is still 308.8 MB. Free memory was 261.6 MB in the beginning and 259.6 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 5.3 GB. * RCFGBuilder took 194.05 ms. Allocated memory is still 308.8 MB. Free memory was 259.6 MB in the beginning and 247.5 MB in the end (delta: 12.1 MB). Peak memory consumption was 12.1 MB. Max. memory is 5.3 GB. * TraceAbstraction took 2476.67 ms. Allocated memory was 308.8 MB in the beginning and 513.8 MB in the end (delta: 205.0 MB). Free memory was 246.5 MB in the beginning and 422.6 MB in the end (delta: -176.1 MB). Peak memory consumption was 28.9 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) : 0.258376 RENAME_VARIABLES(MILLISECONDS) : 0.104492 UNFREEZE(MILLISECONDS) : 0.000000 CONJOIN(MILLISECONDS) : 0.201686 PROJECTAWAY(MILLISECONDS) : 0.107614 ADD_WEAK_EQUALITY(MILLISECONDS) : 0.224911 DISJOIN(MILLISECONDS) : 0.000000 RENAME_VARIABLES_DISJUNCTIVE(MILLISECONDS) : 0.142403 ADD_EQUALITY(MILLISECONDS) : 0.061806 DISJOIN_DISJUNCTIVE(MILLISECONDS) : 0.000000 ADD_DISEQUALITY(MILLISECONDS) : 0.024721 #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, 2.4s OverallTime, 5 OverallIterations, 2 TraceHistogramMax, 0.3s 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, 0.4s 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, 0.8s 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, 0.6s 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_mostprecise.epf_AutomizerC.xml/Csv-Benchmark-0-2018-01-24_20-34-46-436.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_mostprecise.epf_AutomizerC.xml/Csv-VPDomainBenchmark-0-2018-01-24_20-34-46-436.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_mostprecise.epf_AutomizerC.xml/Csv-BenchmarkWithCounters-0-2018-01-24_20-34-46-436.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_mostprecise.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-0-2018-01-24_20-34-46-436.csv Received shutdown request...