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/memleaks_test19_true-valid-memsafety_true-termination.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-6b94a2f [2018-01-24 20:45:50,846 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-24 20:45:50,848 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-24 20:45:50,860 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-24 20:45:50,861 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-24 20:45:50,862 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-24 20:45:50,863 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-24 20:45:50,864 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-24 20:45:50,866 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-24 20:45:50,867 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-24 20:45:50,867 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-01-24 20:45:50,868 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-01-24 20:45:50,868 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-01-24 20:45:50,869 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-01-24 20:45:50,870 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-01-24 20:45:50,873 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-01-24 20:45:50,876 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-01-24 20:45:50,878 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-01-24 20:45:50,879 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-01-24 20:45:50,881 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-01-24 20:45:50,883 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-01-24 20:45:50,883 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-01-24 20:45:50,884 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-01-24 20:45:50,885 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-01-24 20:45:50,886 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-01-24 20:45:50,887 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-01-24 20:45:50,887 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-01-24 20:45:50,888 INFO L177 SettingsManager]: PEA to Boogie provides no preferences, ignoring... [2018-01-24 20:45:50,888 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-01-24 20:45:50,888 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-01-24 20:45:50,889 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-01-24 20:45:50,889 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 20:45:50,900 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-24 20:45:50,900 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-24 20:45:50,901 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-24 20:45:50,901 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-24 20:45:50,901 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-24 20:45:50,902 INFO L133 SettingsManager]: * Weq Fattening=true [2018-01-24 20:45:50,902 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-24 20:45:50,902 INFO L133 SettingsManager]: * Precise comparison operator=true [2018-01-24 20:45:50,902 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-24 20:45:50,902 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-24 20:45:50,903 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-24 20:45:50,903 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-24 20:45:50,903 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-24 20:45:50,903 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-24 20:45:50,903 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-24 20:45:50,903 INFO L133 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2018-01-24 20:45:50,904 INFO L133 SettingsManager]: * Bitprecise bitfields=true [2018-01-24 20:45:50,904 INFO L133 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2018-01-24 20:45:50,904 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-24 20:45:50,904 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-24 20:45:50,904 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-24 20:45:50,904 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-01-24 20:45:50,904 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-24 20:45:50,905 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-24 20:45:50,905 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-24 20:45:50,905 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-24 20:45:50,905 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-24 20:45:50,905 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-24 20:45:50,905 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-24 20:45:50,906 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-24 20:45:50,906 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-01-24 20:45:50,906 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-24 20:45:50,906 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-24 20:45:50,906 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-24 20:45:50,906 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-01-24 20:45:50,907 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-24 20:45:50,907 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-24 20:45:50,942 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-24 20:45:50,952 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-24 20:45:50,955 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-24 20:45:50,957 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-24 20:45:50,957 INFO L276 PluginConnector]: CDTParser initialized [2018-01-24 20:45:50,957 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-memsafety/memleaks_test19_true-valid-memsafety_true-termination.i [2018-01-24 20:45:51,142 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-24 20:45:51,147 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-24 20:45:51,148 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-24 20:45:51,148 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-24 20:45:51,153 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-24 20:45:51,154 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.01 08:45:51" (1/1) ... [2018-01-24 20:45:51,156 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71d0b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 08:45:51, skipping insertion in model container [2018-01-24 20:45:51,157 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.01 08:45:51" (1/1) ... [2018-01-24 20:45:51,170 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-24 20:45:51,219 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-24 20:45:51,339 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-24 20:45:51,357 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-24 20:45:51,365 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 08:45:51 WrapperNode [2018-01-24 20:45:51,365 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-24 20:45:51,366 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-24 20:45:51,366 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-24 20:45:51,366 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-24 20:45:51,383 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 08:45:51" (1/1) ... [2018-01-24 20:45:51,383 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 08:45:51" (1/1) ... [2018-01-24 20:45:51,396 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 08:45:51" (1/1) ... [2018-01-24 20:45:51,396 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 08:45:51" (1/1) ... [2018-01-24 20:45:51,403 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 08:45:51" (1/1) ... [2018-01-24 20:45:51,405 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 08:45:51" (1/1) ... [2018-01-24 20:45:51,407 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 08:45:51" (1/1) ... [2018-01-24 20:45:51,410 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-24 20:45:51,410 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-24 20:45:51,411 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-24 20:45:51,411 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-24 20:45:51,412 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 08:45:51" (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 20:45:51,478 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-24 20:45:51,478 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-24 20:45:51,478 INFO L136 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2018-01-24 20:45:51,479 INFO L136 BoogieDeclarations]: Found implementation of procedure f19 [2018-01-24 20:45:51,479 INFO L136 BoogieDeclarations]: Found implementation of procedure f19_undo [2018-01-24 20:45:51,479 INFO L136 BoogieDeclarations]: Found implementation of procedure g19 [2018-01-24 20:45:51,479 INFO L136 BoogieDeclarations]: Found implementation of procedure probe_19 [2018-01-24 20:45:51,479 INFO L136 BoogieDeclarations]: Found implementation of procedure disconnect_19 [2018-01-24 20:45:51,479 INFO L136 BoogieDeclarations]: Found implementation of procedure entry_point [2018-01-24 20:45:51,480 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-24 20:45:51,480 INFO L128 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2018-01-24 20:45:51,480 INFO L128 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2018-01-24 20:45:51,480 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-01-24 20:45:51,480 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-01-24 20:45:51,480 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-01-24 20:45:51,481 INFO L128 BoogieDeclarations]: Found specification of procedure malloc [2018-01-24 20:45:51,481 INFO L128 BoogieDeclarations]: Found specification of procedure free [2018-01-24 20:45:51,481 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-01-24 20:45:51,481 INFO L128 BoogieDeclarations]: Found specification of procedure ldv_malloc [2018-01-24 20:45:51,481 INFO L128 BoogieDeclarations]: Found specification of procedure f19 [2018-01-24 20:45:51,481 INFO L128 BoogieDeclarations]: Found specification of procedure f19_undo [2018-01-24 20:45:51,481 INFO L128 BoogieDeclarations]: Found specification of procedure g19 [2018-01-24 20:45:51,482 INFO L128 BoogieDeclarations]: Found specification of procedure probe_19 [2018-01-24 20:45:51,482 INFO L128 BoogieDeclarations]: Found specification of procedure disconnect_19 [2018-01-24 20:45:51,482 INFO L128 BoogieDeclarations]: Found specification of procedure entry_point [2018-01-24 20:45:51,482 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-24 20:45:51,482 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-24 20:45:51,482 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-24 20:45:51,781 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-24 20:45:51,782 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.01 08:45:51 BoogieIcfgContainer [2018-01-24 20:45:51,782 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-24 20:45:51,783 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-01-24 20:45:51,783 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-01-24 20:45:51,785 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-01-24 20:45:51,785 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.01 08:45:51" (1/3) ... [2018-01-24 20:45:51,786 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1449c7f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.01 08:45:51, skipping insertion in model container [2018-01-24 20:45:51,786 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 08:45:51" (2/3) ... [2018-01-24 20:45:51,787 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1449c7f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.01 08:45:51, skipping insertion in model container [2018-01-24 20:45:51,787 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.01 08:45:51" (3/3) ... [2018-01-24 20:45:51,788 INFO L105 eAbstractionObserver]: Analyzing ICFG memleaks_test19_true-valid-memsafety_true-termination.i [2018-01-24 20:45:51,795 INFO L130 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-01-24 20:45:51,802 INFO L142 ceAbstractionStarter]: Appying trace abstraction to program that has 21 error locations. [2018-01-24 20:45:51,841 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-24 20:45:51,841 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-24 20:45:51,841 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-24 20:45:51,841 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-24 20:45:51,842 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-24 20:45:51,842 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-24 20:45:51,842 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-24 20:45:51,842 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-01-24 20:45:51,843 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-24 20:45:51,864 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states. [2018-01-24 20:45:51,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-01-24 20:45:51,869 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 20:45:51,870 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 20:45:51,870 INFO L371 AbstractCegarLoop]: === Iteration 1 === [disconnect_19Err0RequiresViolation, disconnect_19Err1RequiresViolation, disconnect_19Err2RequiresViolation, disconnect_19Err3RequiresViolation, f19_undoErr1RequiresViolation, f19_undoErr2RequiresViolation, f19_undoErr3RequiresViolation, f19_undoErr0RequiresViolation, mainErr0EnsuresViolation, f19Err2RequiresViolation, f19Err3RequiresViolation, f19Err0RequiresViolation, f19Err1RequiresViolation, probe_19Err4RequiresViolation, probe_19Err2RequiresViolation, probe_19Err3RequiresViolation, probe_19Err7RequiresViolation, probe_19Err5RequiresViolation, probe_19Err1RequiresViolation, probe_19Err0RequiresViolation, probe_19Err6RequiresViolation]=== [2018-01-24 20:45:51,874 INFO L82 PathProgramCache]: Analyzing trace with hash 1329506467, now seen corresponding path program 1 times [2018-01-24 20:45:51,876 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 20:45:51,926 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:45:51,926 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 20:45:51,926 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:45:51,926 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 20:45:51,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 20:45:51,989 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 20:45:52,126 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 20:45:52,129 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 20:45:52,129 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-24 20:45:52,129 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 20:45:52,132 INFO L409 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-01-24 20:45:52,148 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-01-24 20:45:52,148 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-01-24 20:45:52,151 INFO L87 Difference]: Start difference. First operand 89 states. Second operand 6 states. [2018-01-24 20:45:52,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 20:45:52,594 INFO L93 Difference]: Finished difference Result 139 states and 163 transitions. [2018-01-24 20:45:52,594 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-01-24 20:45:52,595 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2018-01-24 20:45:52,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 20:45:52,607 INFO L225 Difference]: With dead ends: 139 [2018-01-24 20:45:52,607 INFO L226 Difference]: Without dead ends: 133 [2018-01-24 20:45:52,611 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-01-24 20:45:52,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2018-01-24 20:45:52,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 97. [2018-01-24 20:45:52,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-01-24 20:45:52,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 113 transitions. [2018-01-24 20:45:52,664 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 113 transitions. Word has length 15 [2018-01-24 20:45:52,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 20:45:52,664 INFO L432 AbstractCegarLoop]: Abstraction has 97 states and 113 transitions. [2018-01-24 20:45:52,665 INFO L433 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-01-24 20:45:52,665 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 113 transitions. [2018-01-24 20:45:52,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-01-24 20:45:52,666 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 20:45:52,667 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 20:45:52,667 INFO L371 AbstractCegarLoop]: === Iteration 2 === [disconnect_19Err0RequiresViolation, disconnect_19Err1RequiresViolation, disconnect_19Err2RequiresViolation, disconnect_19Err3RequiresViolation, f19_undoErr1RequiresViolation, f19_undoErr2RequiresViolation, f19_undoErr3RequiresViolation, f19_undoErr0RequiresViolation, mainErr0EnsuresViolation, f19Err2RequiresViolation, f19Err3RequiresViolation, f19Err0RequiresViolation, f19Err1RequiresViolation, probe_19Err4RequiresViolation, probe_19Err2RequiresViolation, probe_19Err3RequiresViolation, probe_19Err7RequiresViolation, probe_19Err5RequiresViolation, probe_19Err1RequiresViolation, probe_19Err0RequiresViolation, probe_19Err6RequiresViolation]=== [2018-01-24 20:45:52,667 INFO L82 PathProgramCache]: Analyzing trace with hash 1329506468, now seen corresponding path program 1 times [2018-01-24 20:45:52,667 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 20:45:52,669 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:45:52,669 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 20:45:52,670 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:45:52,670 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 20:45:52,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 20:45:52,712 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 20:45:52,856 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 20:45:52,856 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 20:45:52,856 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-24 20:45:52,856 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 20:45:52,858 INFO L409 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-01-24 20:45:52,858 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-01-24 20:45:52,859 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-01-24 20:45:52,859 INFO L87 Difference]: Start difference. First operand 97 states and 113 transitions. Second operand 6 states. [2018-01-24 20:45:53,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 20:45:53,100 INFO L93 Difference]: Finished difference Result 129 states and 150 transitions. [2018-01-24 20:45:53,100 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-01-24 20:45:53,101 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2018-01-24 20:45:53,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 20:45:53,102 INFO L225 Difference]: With dead ends: 129 [2018-01-24 20:45:53,102 INFO L226 Difference]: Without dead ends: 126 [2018-01-24 20:45:53,103 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-01-24 20:45:53,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2018-01-24 20:45:53,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 109. [2018-01-24 20:45:53,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2018-01-24 20:45:53,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 132 transitions. [2018-01-24 20:45:53,117 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 132 transitions. Word has length 15 [2018-01-24 20:45:53,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 20:45:53,117 INFO L432 AbstractCegarLoop]: Abstraction has 109 states and 132 transitions. [2018-01-24 20:45:53,117 INFO L433 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-01-24 20:45:53,117 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 132 transitions. [2018-01-24 20:45:53,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-01-24 20:45:53,118 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 20:45:53,118 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 20:45:53,118 INFO L371 AbstractCegarLoop]: === Iteration 3 === [disconnect_19Err0RequiresViolation, disconnect_19Err1RequiresViolation, disconnect_19Err2RequiresViolation, disconnect_19Err3RequiresViolation, f19_undoErr1RequiresViolation, f19_undoErr2RequiresViolation, f19_undoErr3RequiresViolation, f19_undoErr0RequiresViolation, mainErr0EnsuresViolation, f19Err2RequiresViolation, f19Err3RequiresViolation, f19Err0RequiresViolation, f19Err1RequiresViolation, probe_19Err4RequiresViolation, probe_19Err2RequiresViolation, probe_19Err3RequiresViolation, probe_19Err7RequiresViolation, probe_19Err5RequiresViolation, probe_19Err1RequiresViolation, probe_19Err0RequiresViolation, probe_19Err6RequiresViolation]=== [2018-01-24 20:45:53,118 INFO L82 PathProgramCache]: Analyzing trace with hash 1959488357, now seen corresponding path program 1 times [2018-01-24 20:45:53,118 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 20:45:53,119 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:45:53,119 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 20:45:53,120 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:45:53,120 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 20:45:53,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 20:45:53,142 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 20:45:53,253 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 20:45:53,253 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 20:45:53,253 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2018-01-24 20:45:53,254 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 20:45:53,254 INFO L409 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-01-24 20:45:53,254 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-01-24 20:45:53,254 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2018-01-24 20:45:53,254 INFO L87 Difference]: Start difference. First operand 109 states and 132 transitions. Second operand 8 states. [2018-01-24 20:45:53,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 20:45:53,683 INFO L93 Difference]: Finished difference Result 149 states and 177 transitions. [2018-01-24 20:45:53,684 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-01-24 20:45:53,684 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 17 [2018-01-24 20:45:53,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 20:45:53,686 INFO L225 Difference]: With dead ends: 149 [2018-01-24 20:45:53,686 INFO L226 Difference]: Without dead ends: 147 [2018-01-24 20:45:53,687 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2018-01-24 20:45:53,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2018-01-24 20:45:53,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 106. [2018-01-24 20:45:53,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2018-01-24 20:45:53,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 128 transitions. [2018-01-24 20:45:53,706 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 128 transitions. Word has length 17 [2018-01-24 20:45:53,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 20:45:53,707 INFO L432 AbstractCegarLoop]: Abstraction has 106 states and 128 transitions. [2018-01-24 20:45:53,707 INFO L433 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-01-24 20:45:53,707 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 128 transitions. [2018-01-24 20:45:53,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-01-24 20:45:53,708 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 20:45:53,708 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 20:45:53,708 INFO L371 AbstractCegarLoop]: === Iteration 4 === [disconnect_19Err0RequiresViolation, disconnect_19Err1RequiresViolation, disconnect_19Err2RequiresViolation, disconnect_19Err3RequiresViolation, f19_undoErr1RequiresViolation, f19_undoErr2RequiresViolation, f19_undoErr3RequiresViolation, f19_undoErr0RequiresViolation, mainErr0EnsuresViolation, f19Err2RequiresViolation, f19Err3RequiresViolation, f19Err0RequiresViolation, f19Err1RequiresViolation, probe_19Err4RequiresViolation, probe_19Err2RequiresViolation, probe_19Err3RequiresViolation, probe_19Err7RequiresViolation, probe_19Err5RequiresViolation, probe_19Err1RequiresViolation, probe_19Err0RequiresViolation, probe_19Err6RequiresViolation]=== [2018-01-24 20:45:53,709 INFO L82 PathProgramCache]: Analyzing trace with hash 1959488358, now seen corresponding path program 1 times [2018-01-24 20:45:53,709 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 20:45:53,710 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:45:53,711 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 20:45:53,711 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:45:53,711 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 20:45:53,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 20:45:53,727 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 20:45:53,846 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 20:45:53,847 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 20:45:53,847 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2018-01-24 20:45:53,847 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 20:45:53,847 INFO L409 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-01-24 20:45:53,847 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-01-24 20:45:53,847 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2018-01-24 20:45:53,848 INFO L87 Difference]: Start difference. First operand 106 states and 128 transitions. Second operand 9 states. [2018-01-24 20:45:54,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 20:45:54,228 INFO L93 Difference]: Finished difference Result 152 states and 182 transitions. [2018-01-24 20:45:54,229 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-01-24 20:45:54,229 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 17 [2018-01-24 20:45:54,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 20:45:54,231 INFO L225 Difference]: With dead ends: 152 [2018-01-24 20:45:54,231 INFO L226 Difference]: Without dead ends: 149 [2018-01-24 20:45:54,231 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2018-01-24 20:45:54,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2018-01-24 20:45:54,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 82. [2018-01-24 20:45:54,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2018-01-24 20:45:54,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 89 transitions. [2018-01-24 20:45:54,246 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 89 transitions. Word has length 17 [2018-01-24 20:45:54,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 20:45:54,246 INFO L432 AbstractCegarLoop]: Abstraction has 82 states and 89 transitions. [2018-01-24 20:45:54,246 INFO L433 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-01-24 20:45:54,246 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 89 transitions. [2018-01-24 20:45:54,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-01-24 20:45:54,247 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 20:45:54,248 INFO L322 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 20:45:54,248 INFO L371 AbstractCegarLoop]: === Iteration 5 === [disconnect_19Err0RequiresViolation, disconnect_19Err1RequiresViolation, disconnect_19Err2RequiresViolation, disconnect_19Err3RequiresViolation, f19_undoErr1RequiresViolation, f19_undoErr2RequiresViolation, f19_undoErr3RequiresViolation, f19_undoErr0RequiresViolation, mainErr0EnsuresViolation, f19Err2RequiresViolation, f19Err3RequiresViolation, f19Err0RequiresViolation, f19Err1RequiresViolation, probe_19Err4RequiresViolation, probe_19Err2RequiresViolation, probe_19Err3RequiresViolation, probe_19Err7RequiresViolation, probe_19Err5RequiresViolation, probe_19Err1RequiresViolation, probe_19Err0RequiresViolation, probe_19Err6RequiresViolation]=== [2018-01-24 20:45:54,248 INFO L82 PathProgramCache]: Analyzing trace with hash -1193563309, now seen corresponding path program 1 times [2018-01-24 20:45:54,248 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 20:45:54,250 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:45:54,250 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 20:45:54,250 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:45:54,250 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 20:45:54,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 20:45:54,264 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 20:45:54,380 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-01-24 20:45:54,381 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-24 20:45:54,381 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-24 20:45:54,382 INFO L199 CegarAbsIntRunner]: Running AI on error trace of length 27 with the following transitions: [2018-01-24 20:45:54,384 INFO L201 CegarAbsIntRunner]: [24], [27], [38], [44], [45], [46], [47], [51], [64], [66], [69], [70], [77], [106], [108], [109], [110], [111], [112], [114], [118], [119], [120] [2018-01-24 20:45:54,445 INFO L147 AbstractInterpreter]: Using domain VPDomain [2018-01-24 20:45:54,445 INFO L101 FixpointEngine]: Starting fixpoint engine with domain VPDomain (maxUnwinding=3, maxParallelStates=2) [2018-01-24 20:46:10,702 INFO L262 AbstractInterpreter]: Error location(s) were unreachable [2018-01-24 20:46:10,704 INFO L268 AbstractInterpreter]: Visited 18 different actions 18 times. Never merged. Never widened. Never found a fixpoint. Largest state had 21 variables. [2018-01-24 20:46:10,714 INFO L395 sIntCurrentIteration]: Generating AbsInt predicates [2018-01-24 20:46:18,837 INFO L232 lantSequenceWeakener]: Weakened 4 states. On average, predicates are now at 51.57% of their original sizes. [2018-01-24 20:46:18,837 INFO L408 sIntCurrentIteration]: Unifying AI predicates [2018-01-24 20:46:18,984 WARN L1007 $PredicateComparison]: unable to prove that (let ((.cse3 (+ c_probe_19_~a.offset 4))) (let ((.cse1 (select (select |c_#memory_$Pointer$.offset| c_probe_19_~a.base) .cse3)) (.cse0 (select (select |c_#memory_$Pointer$.base| c_probe_19_~a.base) .cse3)) (.cse2 (select |c_#valid| 0))) (and (not (= 0 c_probe_19_~a.base)) (= .cse0 .cse1) (= 1 (select |c_#valid| c_probe_19_~a.base)) (not (= |c_#valid| |c_#length|)) (= .cse1 .cse2) (= 0 .cse0) (= (select |c_#length| c_probe_19_~a.base) 8) (forall ((v_weq0_1 Int) (v_weq1_1 Int)) (or (not (= v_weq0_1 c_probe_19_~a.base)) (not (= v_weq1_1 (+ c_probe_19_~a.offset 4))) (= (select (select |c_#memory_$Pointer$.base| v_weq0_1) v_weq1_1) (select (select |c_#memory_$Pointer$.offset| v_weq0_1) v_weq1_1)))) (forall ((v_weq0_1 Int)) (or (not (= v_weq0_1 (+ c_probe_19_~a.offset 4))) (= (select (select |c_#memory_$Pointer$.base| c_probe_19_~a.base) v_weq0_1) (select (select |c_#memory_$Pointer$.offset| c_probe_19_~a.base) v_weq0_1)))) (= .cse2 c_probe_19_~a.offset)))) is different from false [2018-01-24 20:46:18,997 INFO L419 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-01-24 20:46:18,998 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-01-24 20:46:18,998 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [14] imperfect sequences [6] total 19 [2018-01-24 20:46:18,998 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 20:46:18,998 INFO L409 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-01-24 20:46:18,999 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-01-24 20:46:18,999 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=138, Unknown=1, NotChecked=24, Total=210 [2018-01-24 20:46:18,999 INFO L87 Difference]: Start difference. First operand 82 states and 89 transitions. Second operand 15 states. Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown