java -Xmx6000000000 -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data ./data --generate-csv --csv-dir ../../../releaseScripts/default/UAutomizer-linux/csv -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/ai/eq-bench/mempurity-32bit-Automizer_Taipan+AI_EQ_preciseopt.epf -i ../../../trunk/examples/svcomp/memsafety-ext2/split_list_test05_true-valid-memsafety.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-2f49842 [2018-01-21 08:36:20,047 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-21 08:36:20,049 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-21 08:36:20,065 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-21 08:36:20,065 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-21 08:36:20,066 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-21 08:36:20,067 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-21 08:36:20,069 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-21 08:36:20,071 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-21 08:36:20,072 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-21 08:36:20,072 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-01-21 08:36:20,072 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-01-21 08:36:20,073 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-01-21 08:36:20,075 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-01-21 08:36:20,076 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-01-21 08:36:20,078 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-01-21 08:36:20,080 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-01-21 08:36:20,082 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-01-21 08:36:20,083 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-01-21 08:36:20,084 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-01-21 08:36:20,086 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-01-21 08:36:20,087 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-01-21 08:36:20,087 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-01-21 08:36:20,088 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-01-21 08:36:20,089 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-01-21 08:36:20,090 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-01-21 08:36:20,090 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-01-21 08:36:20,091 INFO L177 SettingsManager]: PEA to Boogie provides no preferences, ignoring... [2018-01-21 08:36:20,091 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-01-21 08:36:20,091 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-01-21 08:36:20,092 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-01-21 08:36:20,092 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/eq-bench/mempurity-32bit-Automizer_Taipan+AI_EQ_preciseopt.epf [2018-01-21 08:36:20,102 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-21 08:36:20,103 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-21 08:36:20,103 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-21 08:36:20,104 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-21 08:36:20,104 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-21 08:36:20,104 INFO L133 SettingsManager]: * Weq Fattening=true [2018-01-21 08:36:20,104 INFO L133 SettingsManager]: * Flatten before fatten=true [2018-01-21 08:36:20,104 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-21 08:36:20,105 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-21 08:36:20,105 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-21 08:36:20,105 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-21 08:36:20,106 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-21 08:36:20,106 INFO L133 SettingsManager]: * Check allocation purity=true [2018-01-21 08:36:20,106 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-21 08:36:20,106 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-21 08:36:20,106 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-21 08:36:20,107 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-01-21 08:36:20,107 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-21 08:36:20,107 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-01-21 08:36:20,107 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-21 08:36:20,107 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-01-21 08:36:20,108 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-01-21 08:36:20,108 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-21 08:36:20,108 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-01-21 08:36:20,108 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-21 08:36:20,109 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-21 08:36:20,109 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-21 08:36:20,109 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-21 08:36:20,109 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-21 08:36:20,109 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-21 08:36:20,110 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-21 08:36:20,110 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-21 08:36:20,110 INFO L133 SettingsManager]: * Stop after first violation was found=false [2018-01-21 08:36:20,110 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-01-21 08:36:20,110 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-21 08:36:20,111 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-21 08:36:20,111 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-21 08:36:20,111 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-01-21 08:36:20,112 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-21 08:36:20,112 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-21 08:36:20,147 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-21 08:36:20,159 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-21 08:36:20,163 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-21 08:36:20,164 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-21 08:36:20,165 INFO L276 PluginConnector]: CDTParser initialized [2018-01-21 08:36:20,165 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/memsafety-ext2/split_list_test05_true-valid-memsafety.i [2018-01-21 08:36:20,348 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-21 08:36:20,352 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-21 08:36:20,353 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-21 08:36:20,353 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-21 08:36:20,357 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-21 08:36:20,358 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.01 08:36:20" (1/1) ... [2018-01-21 08:36:20,360 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@41741684 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 08:36:20, skipping insertion in model container [2018-01-21 08:36:20,361 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.01 08:36:20" (1/1) ... [2018-01-21 08:36:20,373 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-21 08:36:20,408 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-21 08:36:20,538 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-21 08:36:20,568 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-21 08:36:20,581 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 08:36:20 WrapperNode [2018-01-21 08:36:20,581 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-21 08:36:20,582 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-21 08:36:20,582 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-21 08:36:20,582 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-21 08:36:20,592 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 08:36:20" (1/1) ... [2018-01-21 08:36:20,593 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 08:36:20" (1/1) ... [2018-01-21 08:36:20,604 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 08:36:20" (1/1) ... [2018-01-21 08:36:20,604 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 08:36:20" (1/1) ... [2018-01-21 08:36:20,616 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 08:36:20" (1/1) ... [2018-01-21 08:36:20,622 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 08:36:20" (1/1) ... [2018-01-21 08:36:20,624 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 08:36:20" (1/1) ... [2018-01-21 08:36:20,628 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-21 08:36:20,629 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-21 08:36:20,629 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-21 08:36:20,629 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-21 08:36:20,630 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 08:36:20" (1/1) ... No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-21 08:36:20,676 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-21 08:36:20,676 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-21 08:36:20,677 INFO L136 BoogieDeclarations]: Found implementation of procedure containsHead [2018-01-21 08:36:20,677 INFO L136 BoogieDeclarations]: Found implementation of procedure containsBody [2018-01-21 08:36:20,677 INFO L136 BoogieDeclarations]: Found implementation of procedure append [2018-01-21 08:36:20,677 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-21 08:36:20,677 INFO L128 BoogieDeclarations]: Found specification of procedure write~int [2018-01-21 08:36:20,677 INFO L128 BoogieDeclarations]: Found specification of procedure read~int [2018-01-21 08:36:20,678 INFO L128 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2018-01-21 08:36:20,678 INFO L128 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2018-01-21 08:36:20,678 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-01-21 08:36:20,678 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-01-21 08:36:20,678 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-01-21 08:36:20,678 INFO L128 BoogieDeclarations]: Found specification of procedure free [2018-01-21 08:36:20,678 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2018-01-21 08:36:20,678 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-01-21 08:36:20,679 INFO L128 BoogieDeclarations]: Found specification of procedure containsHead [2018-01-21 08:36:20,679 INFO L128 BoogieDeclarations]: Found specification of procedure containsBody [2018-01-21 08:36:20,679 INFO L128 BoogieDeclarations]: Found specification of procedure append [2018-01-21 08:36:20,679 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-21 08:36:20,679 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-21 08:36:20,679 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-21 08:36:21,247 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-21 08:36:21,248 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.01 08:36:21 BoogieIcfgContainer [2018-01-21 08:36:21,248 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-21 08:36:21,249 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-01-21 08:36:21,249 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-01-21 08:36:21,251 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-01-21 08:36:21,251 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.01 08:36:20" (1/3) ... [2018-01-21 08:36:21,252 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@467c7f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.01 08:36:21, skipping insertion in model container [2018-01-21 08:36:21,252 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 08:36:20" (2/3) ... [2018-01-21 08:36:21,252 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@467c7f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.01 08:36:21, skipping insertion in model container [2018-01-21 08:36:21,252 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.01 08:36:21" (3/3) ... [2018-01-21 08:36:21,254 INFO L105 eAbstractionObserver]: Analyzing ICFG split_list_test05_true-valid-memsafety.i [2018-01-21 08:36:21,261 INFO L130 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-01-21 08:36:21,268 INFO L142 ceAbstractionStarter]: Appying trace abstraction to program that has 6 error locations. [2018-01-21 08:36:21,311 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 08:36:21,311 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 08:36:21,311 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 08:36:21,311 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 08:36:21,311 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 08:36:21,311 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 08:36:21,312 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 08:36:21,312 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.initErr0EnsuresViolation======== [2018-01-21 08:36:21,312 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 08:36:21,334 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states. [2018-01-21 08:36:21,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-01-21 08:36:21,340 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 08:36:21,341 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-01-21 08:36:21,341 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.initErr0EnsuresViolation]=== [2018-01-21 08:36:21,345 INFO L82 PathProgramCache]: Analyzing trace with hash 425556, now seen corresponding path program 1 times [2018-01-21 08:36:21,347 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 08:36:21,390 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:36:21,390 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 08:36:21,390 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:36:21,390 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 08:36:21,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 08:36:21,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 08:36:21,443 INFO L381 BasicCegarLoop]: Counterexample might be feasible [2018-01-21 08:36:21,464 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 08:36:21,474 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 08:36:21,474 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 08:36:21,474 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 08:36:21,474 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 08:36:21,474 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 08:36:21,474 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 08:36:21,474 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 08:36:21,474 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == containsHeadErr0EnsuresViolation======== [2018-01-21 08:36:21,474 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 08:36:21,480 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states. [2018-01-21 08:36:21,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2018-01-21 08:36:21,497 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 08:36:21,498 INFO L322 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 08:36:21,498 INFO L371 AbstractCegarLoop]: === Iteration 1 === [containsHeadErr0EnsuresViolation]=== [2018-01-21 08:36:21,498 INFO L82 PathProgramCache]: Analyzing trace with hash 1454005036, now seen corresponding path program 1 times [2018-01-21 08:36:21,498 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 08:36:21,499 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:36:21,500 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 08:36:21,500 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:36:21,500 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 08:36:21,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 08:36:21,661 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 08:36:21,908 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 924 trivial. 0 not checked. [2018-01-21 08:36:21,909 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 08:36:21,910 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-21 08:36:21,910 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 08:36:21,912 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-21 08:36:21,922 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-21 08:36:21,923 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-21 08:36:21,924 INFO L87 Difference]: Start difference. First operand 198 states. Second operand 2 states. [2018-01-21 08:36:21,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 08:36:21,966 INFO L93 Difference]: Finished difference Result 383 states and 479 transitions. [2018-01-21 08:36:21,966 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-21 08:36:21,967 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 213 [2018-01-21 08:36:21,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 08:36:21,972 INFO L225 Difference]: With dead ends: 383 [2018-01-21 08:36:21,972 INFO L226 Difference]: Without dead ends: 0 [2018-01-21 08:36:21,977 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-21 08:36:21,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-01-21 08:36:21,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-01-21 08:36:21,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-01-21 08:36:21,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-01-21 08:36:21,996 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 213 [2018-01-21 08:36:21,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 08:36:21,996 INFO L432 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-01-21 08:36:21,996 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-21 08:36:21,997 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-01-21 08:36:21,997 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-01-21 08:36:22,000 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 08:36:22,000 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 08:36:22,000 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 08:36:22,000 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 08:36:22,000 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 08:36:22,001 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 08:36:22,001 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 08:36:22,001 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == containsBodyErr0EnsuresViolation======== [2018-01-21 08:36:22,001 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 08:36:22,004 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states. [2018-01-21 08:36:22,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2018-01-21 08:36:22,011 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 08:36:22,011 INFO L322 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 08:36:22,011 INFO L371 AbstractCegarLoop]: === Iteration 1 === [containsBodyErr0EnsuresViolation]=== [2018-01-21 08:36:22,011 INFO L82 PathProgramCache]: Analyzing trace with hash -2074036853, now seen corresponding path program 1 times [2018-01-21 08:36:22,011 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 08:36:22,012 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:36:22,012 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 08:36:22,012 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:36:22,012 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 08:36:22,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 08:36:22,043 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 08:36:22,168 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 924 trivial. 0 not checked. [2018-01-21 08:36:22,168 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 08:36:22,169 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-21 08:36:22,169 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 08:36:22,170 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-21 08:36:22,170 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-21 08:36:22,170 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-21 08:36:22,171 INFO L87 Difference]: Start difference. First operand 198 states. Second operand 2 states. [2018-01-21 08:36:22,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 08:36:22,194 INFO L93 Difference]: Finished difference Result 383 states and 479 transitions. [2018-01-21 08:36:22,194 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-21 08:36:22,194 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 216 [2018-01-21 08:36:22,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 08:36:22,195 INFO L225 Difference]: With dead ends: 383 [2018-01-21 08:36:22,195 INFO L226 Difference]: Without dead ends: 0 [2018-01-21 08:36:22,197 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-21 08:36:22,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-01-21 08:36:22,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-01-21 08:36:22,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-01-21 08:36:22,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-01-21 08:36:22,199 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 216 [2018-01-21 08:36:22,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 08:36:22,199 INFO L432 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-01-21 08:36:22,199 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-21 08:36:22,199 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-01-21 08:36:22,199 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-01-21 08:36:22,202 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 08:36:22,202 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 08:36:22,208 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 08:36:22,208 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 08:36:22,209 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 08:36:22,209 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 08:36:22,209 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 08:36:22,209 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.startErr0EnsuresViolation======== [2018-01-21 08:36:22,209 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 08:36:22,212 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states. [2018-01-21 08:36:22,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2018-01-21 08:36:22,217 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 08:36:22,218 INFO L322 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 08:36:22,218 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 08:36:22,218 INFO L82 PathProgramCache]: Analyzing trace with hash -1555624233, now seen corresponding path program 1 times [2018-01-21 08:36:22,218 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 08:36:22,219 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:36:22,219 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 08:36:22,219 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:36:22,220 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 08:36:22,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 08:36:22,244 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 08:36:22,369 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 924 trivial. 0 not checked. [2018-01-21 08:36:22,369 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 08:36:22,369 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-21 08:36:22,369 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 08:36:22,370 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-21 08:36:22,370 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-21 08:36:22,371 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-21 08:36:22,371 INFO L87 Difference]: Start difference. First operand 198 states. Second operand 2 states. [2018-01-21 08:36:22,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 08:36:22,388 INFO L93 Difference]: Finished difference Result 383 states and 479 transitions. [2018-01-21 08:36:22,388 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-21 08:36:22,388 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 209 [2018-01-21 08:36:22,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 08:36:22,395 INFO L225 Difference]: With dead ends: 383 [2018-01-21 08:36:22,396 INFO L226 Difference]: Without dead ends: 192 [2018-01-21 08:36:22,397 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-21 08:36:22,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2018-01-21 08:36:22,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 192. [2018-01-21 08:36:22,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2018-01-21 08:36:22,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 228 transitions. [2018-01-21 08:36:22,430 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 228 transitions. Word has length 209 [2018-01-21 08:36:22,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 08:36:22,430 INFO L432 AbstractCegarLoop]: Abstraction has 192 states and 228 transitions. [2018-01-21 08:36:22,430 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-21 08:36:22,431 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 228 transitions. [2018-01-21 08:36:22,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 306 [2018-01-21 08:36:22,438 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 08:36:22,438 INFO L322 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 08:36:22,438 INFO L371 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 08:36:22,438 INFO L82 PathProgramCache]: Analyzing trace with hash -258479386, now seen corresponding path program 1 times [2018-01-21 08:36:22,439 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 08:36:22,439 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:36:22,440 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 08:36:22,440 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:36:22,440 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 08:36:22,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 08:36:22,474 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 08:36:22,683 INFO L134 CoverageAnalysis]: Checked inductivity of 1470 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 1372 trivial. 0 not checked. [2018-01-21 08:36:22,684 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 08:36:22,684 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-21 08:36:22,685 INFO L199 CegarAbsIntRunner]: Running AI on error trace of length 306 with the following transitions: [2018-01-21 08:36:22,688 INFO L201 CegarAbsIntRunner]: [0], [1], [2], [10], [12], [21], [23], [33], [35], [46], [48], [60], [62], [63], [65], [66], [67], [68], [69], [73], [77], [81], [89], [92], [107], [111], [115], [123], [126], [141], [145], [149], [157], [160], [166], [167], [168], [169], [173], [176], [179], [189], [193], [196], [210], [213], [216], [226], [230], [233], [247], [251], [261], [262], [263], [265], [266], [268], [269], [270], [278], [280], [289], [291], [301], [303], [314], [316], [328], [330], [331], [336], [337], [338], [339], [340], [341], [342], [349], [353], [354], [355], [356], [357], [367], [369], [370], [371], [372], [373], [374], [375], [376], [377], [378], [379], [380], [381], [382], [383], [384], [385], [386], [387], [388], [389], [390], [391], [392], [393], [394], [395], [396], [397], [398], [399], [400], [401], [402], [403], [404], [405], [406] [2018-01-21 08:36:22,751 INFO L147 AbstractInterpreter]: Using domain VPDomain [2018-01-21 08:36:22,752 INFO L101 FixpointEngine]: Starting fixpoint engine with domain VPDomain (maxUnwinding=3, maxParallelStates=2) Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown