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/ldv-memsafety/memleaks_test19_false-valid-free.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-2f49842 [2018-01-21 08:52:58,249 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-21 08:52:58,252 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-21 08:52:58,265 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-21 08:52:58,266 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-21 08:52:58,267 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-21 08:52:58,268 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-21 08:52:58,269 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-21 08:52:58,271 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-21 08:52:58,271 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-21 08:52:58,272 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-01-21 08:52:58,272 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-01-21 08:52:58,273 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-01-21 08:52:58,274 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-01-21 08:52:58,274 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-01-21 08:52:58,277 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-01-21 08:52:58,279 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-01-21 08:52:58,281 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-01-21 08:52:58,282 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-01-21 08:52:58,284 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-01-21 08:52:58,286 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-01-21 08:52:58,292 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-01-21 08:52:58,292 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-01-21 08:52:58,292 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 08:52:58,303 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-21 08:52:58,303 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-21 08:52:58,304 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-21 08:52:58,304 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-21 08:52:58,304 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-21 08:52:58,305 INFO L133 SettingsManager]: * Weq Fattening=true [2018-01-21 08:52:58,305 INFO L133 SettingsManager]: * Flatten before fatten=true [2018-01-21 08:52:58,305 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-21 08:52:58,305 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-21 08:52:58,306 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-21 08:52:58,306 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-21 08:52:58,306 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-21 08:52:58,306 INFO L133 SettingsManager]: * Check allocation purity=true [2018-01-21 08:52:58,307 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-21 08:52:58,307 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-21 08:52:58,307 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-21 08:52:58,307 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-01-21 08:52:58,307 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-21 08:52:58,307 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-01-21 08:52:58,308 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-21 08:52:58,308 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-01-21 08:52:58,308 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-01-21 08:52:58,308 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-21 08:52:58,308 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-01-21 08:52:58,309 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-21 08:52:58,309 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-21 08:52:58,309 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-21 08:52:58,309 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-21 08:52:58,310 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-21 08:52:58,310 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-21 08:52:58,310 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-21 08:52:58,310 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-21 08:52:58,310 INFO L133 SettingsManager]: * Stop after first violation was found=false [2018-01-21 08:52:58,310 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-01-21 08:52:58,311 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-21 08:52:58,311 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-21 08:52:58,311 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-21 08:52:58,311 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-01-21 08:52:58,312 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-21 08:52:58,312 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-21 08:52:58,348 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-21 08:52:58,362 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-21 08:52:58,366 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-21 08:52:58,368 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-21 08:52:58,368 INFO L276 PluginConnector]: CDTParser initialized [2018-01-21 08:52:58,369 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-memsafety/memleaks_test19_false-valid-free.i [2018-01-21 08:52:58,586 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-21 08:52:58,589 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-21 08:52:58,590 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-21 08:52:58,590 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-21 08:52:58,596 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-21 08:52:58,597 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.01 08:52:58" (1/1) ... [2018-01-21 08:52:58,600 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@53c7d0dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 08:52:58, skipping insertion in model container [2018-01-21 08:52:58,600 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.01 08:52:58" (1/1) ... [2018-01-21 08:52:58,616 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-21 08:52:58,664 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-21 08:52:58,789 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-21 08:52:58,812 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-21 08:52:58,822 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 08:52:58 WrapperNode [2018-01-21 08:52:58,822 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-21 08:52:58,823 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-21 08:52:58,823 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-21 08:52:58,823 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-21 08:52:58,838 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 08:52:58" (1/1) ... [2018-01-21 08:52:58,838 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 08:52:58" (1/1) ... [2018-01-21 08:52:58,849 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 08:52:58" (1/1) ... [2018-01-21 08:52:58,849 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 08:52:58" (1/1) ... [2018-01-21 08:52:58,856 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 08:52:58" (1/1) ... [2018-01-21 08:52:58,859 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 08:52:58" (1/1) ... [2018-01-21 08:52:58,861 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 08:52:58" (1/1) ... [2018-01-21 08:52:58,863 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-21 08:52:58,864 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-21 08:52:58,864 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-21 08:52:58,864 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-21 08:52:58,865 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 08:52:58" (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 08:52:58,915 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-21 08:52:58,915 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-21 08:52:58,915 INFO L136 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2018-01-21 08:52:58,915 INFO L136 BoogieDeclarations]: Found implementation of procedure f19 [2018-01-21 08:52:58,915 INFO L136 BoogieDeclarations]: Found implementation of procedure f19_undo [2018-01-21 08:52:58,915 INFO L136 BoogieDeclarations]: Found implementation of procedure g19 [2018-01-21 08:52:58,915 INFO L136 BoogieDeclarations]: Found implementation of procedure probe_unsafe_19 [2018-01-21 08:52:58,915 INFO L136 BoogieDeclarations]: Found implementation of procedure disconnect_19 [2018-01-21 08:52:58,915 INFO L136 BoogieDeclarations]: Found implementation of procedure entry_point [2018-01-21 08:52:58,916 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-21 08:52:58,916 INFO L128 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2018-01-21 08:52:58,916 INFO L128 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2018-01-21 08:52:58,916 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-01-21 08:52:58,916 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-01-21 08:52:58,916 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-01-21 08:52:58,917 INFO L128 BoogieDeclarations]: Found specification of procedure malloc [2018-01-21 08:52:58,917 INFO L128 BoogieDeclarations]: Found specification of procedure free [2018-01-21 08:52:58,917 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-01-21 08:52:58,917 INFO L128 BoogieDeclarations]: Found specification of procedure ldv_malloc [2018-01-21 08:52:58,917 INFO L128 BoogieDeclarations]: Found specification of procedure f19 [2018-01-21 08:52:58,917 INFO L128 BoogieDeclarations]: Found specification of procedure f19_undo [2018-01-21 08:52:58,917 INFO L128 BoogieDeclarations]: Found specification of procedure g19 [2018-01-21 08:52:58,918 INFO L128 BoogieDeclarations]: Found specification of procedure probe_unsafe_19 [2018-01-21 08:52:58,918 INFO L128 BoogieDeclarations]: Found specification of procedure disconnect_19 [2018-01-21 08:52:58,918 INFO L128 BoogieDeclarations]: Found specification of procedure entry_point [2018-01-21 08:52:58,918 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-21 08:52:58,918 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-21 08:52:58,918 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-21 08:52:59,187 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-21 08:52:59,188 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.01 08:52:59 BoogieIcfgContainer [2018-01-21 08:52:59,188 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-21 08:52:59,189 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-01-21 08:52:59,189 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-01-21 08:52:59,191 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-01-21 08:52:59,192 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.01 08:52:58" (1/3) ... [2018-01-21 08:52:59,193 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39e0cfa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.01 08:52:59, skipping insertion in model container [2018-01-21 08:52:59,193 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 08:52:58" (2/3) ... [2018-01-21 08:52:59,193 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39e0cfa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.01 08:52:59, skipping insertion in model container [2018-01-21 08:52:59,193 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.01 08:52:59" (3/3) ... [2018-01-21 08:52:59,195 INFO L105 eAbstractionObserver]: Analyzing ICFG memleaks_test19_false-valid-free.i [2018-01-21 08:52:59,206 INFO L130 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-01-21 08:52:59,213 INFO L142 ceAbstractionStarter]: Appying trace abstraction to program that has 10 error locations. [2018-01-21 08:52:59,258 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 08:52:59,258 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 08:52:59,258 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 08:52:59,258 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 08:52:59,258 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 08:52:59,258 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 08:52:59,259 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 08:52:59,259 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == disconnect_19Err0EnsuresViolation======== [2018-01-21 08:52:59,259 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 08:52:59,278 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states. [2018-01-21 08:52:59,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-01-21 08:52:59,286 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 08:52:59,287 INFO L322 BasicCegarLoop]: trace histogram [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 08:52:59,287 INFO L371 AbstractCegarLoop]: === Iteration 1 === [disconnect_19Err0EnsuresViolation]=== [2018-01-21 08:52:59,291 INFO L82 PathProgramCache]: Analyzing trace with hash 554684621, now seen corresponding path program 1 times [2018-01-21 08:52:59,293 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 08:52:59,342 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:52:59,342 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 08:52:59,342 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:52:59,342 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 08:52:59,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 08:52:59,427 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 08:52:59,585 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-21 08:52:59,587 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 08:52:59,588 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-01-21 08:52:59,588 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 08:52:59,670 INFO L409 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-01-21 08:52:59,680 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-01-21 08:52:59,681 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-01-21 08:52:59,682 INFO L87 Difference]: Start difference. First operand 78 states. Second operand 6 states. [2018-01-21 08:52:59,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 08:52:59,764 INFO L93 Difference]: Finished difference Result 116 states and 123 transitions. [2018-01-21 08:52:59,764 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-01-21 08:52:59,765 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 36 [2018-01-21 08:52:59,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 08:52:59,774 INFO L225 Difference]: With dead ends: 116 [2018-01-21 08:52:59,774 INFO L226 Difference]: Without dead ends: 60 [2018-01-21 08:52:59,777 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-01-21 08:52:59,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-01-21 08:52:59,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2018-01-21 08:52:59,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-01-21 08:52:59,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 65 transitions. [2018-01-21 08:52:59,818 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 65 transitions. Word has length 36 [2018-01-21 08:52:59,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 08:52:59,821 INFO L432 AbstractCegarLoop]: Abstraction has 60 states and 65 transitions. [2018-01-21 08:52:59,821 INFO L433 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-01-21 08:52:59,821 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 65 transitions. [2018-01-21 08:52:59,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-01-21 08:52:59,824 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 08:52:59,825 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, 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 08:52:59,825 INFO L371 AbstractCegarLoop]: === Iteration 2 === [disconnect_19Err0EnsuresViolation]=== [2018-01-21 08:52:59,825 INFO L82 PathProgramCache]: Analyzing trace with hash 1592746949, now seen corresponding path program 1 times [2018-01-21 08:52:59,825 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 08:52:59,827 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:52:59,828 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 08:52:59,828 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:52:59,828 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 08:52:59,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 08:52:59,856 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 08:53:00,022 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-01-21 08:53:00,022 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 08:53:00,022 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-21 08:53:00,023 INFO L199 CegarAbsIntRunner]: Running AI on error trace of length 55 with the following transitions: [2018-01-21 08:53:00,025 INFO L201 CegarAbsIntRunner]: [0], [1], [2], [3], [6], [7], [9], [10], [11], [16], [18], [21], [33], [34], [35], [37], [38], [40], [41], [42], [43], [44], [52], [54], [55], [56], [59], [61], [63], [69], [70], [72], [73], [79], [81], [84], [93], [94], [95], [96], [97], [98], [103], [105], [106], [107], [108], [109], [111], [112], [113] [2018-01-21 08:53:00,083 INFO L147 AbstractInterpreter]: Using domain VPDomain [2018-01-21 08:53:00,084 INFO L101 FixpointEngine]: Starting fixpoint engine with domain VPDomain (maxUnwinding=3, maxParallelStates=2) [2018-01-21 08:53:21,127 INFO L262 AbstractInterpreter]: Error location(s) were unreachable [2018-01-21 08:53:21,128 INFO L268 AbstractInterpreter]: Visited 18 different actions 18 times. Never merged. Never widened. Never found a fixpoint. Largest state had 25 variables. [2018-01-21 08:53:21,142 INFO L395 sIntCurrentIteration]: Generating AbsInt predicates [2018-01-21 08:53:29,181 INFO L232 lantSequenceWeakener]: Weakened 17 states. On average, predicates are now at 62.88% of their original sizes. [2018-01-21 08:53:29,181 INFO L408 sIntCurrentIteration]: Unifying AI predicates [2018-01-21 08:53:29,366 WARN L1007 $PredicateComparison]: unable to prove that (let ((.cse3 (+ c_probe_unsafe_19_~a.offset 4))) (let ((.cse0 (select (select |c_#memory_$Pointer$.base| c_probe_unsafe_19_~a.base) .cse3)) (.cse1 (select |c_#valid| 0)) (.cse2 (select (select |c_#memory_$Pointer$.offset| c_probe_unsafe_19_~a.base) .cse3))) (and (not (= 0 c_probe_unsafe_19_~a.base)) (= 0 .cse0) (forall ((v_weq0_1 Int)) (or (not (= v_weq0_1 (+ c_probe_unsafe_19_~a.offset 4))) (= (select (select |c_#memory_$Pointer$.offset| c_probe_unsafe_19_~a.base) v_weq0_1) (select (select |c_#memory_$Pointer$.base| c_probe_unsafe_19_~a.base) v_weq0_1)))) (forall ((v_weq0_1 Int) (v_weq1_1 Int)) (or (not (= v_weq0_1 c_probe_unsafe_19_~a.base)) (not (= v_weq1_1 (+ c_probe_unsafe_19_~a.offset 4))) (= (select (select |c_#memory_$Pointer$.base| v_weq0_1) v_weq1_1) (select (select |c_#memory_$Pointer$.offset| v_weq0_1) v_weq1_1)))) (= .cse0 .cse1) (= .cse2 c_probe_unsafe_19_~a.offset) (= 1 (select |c_#valid| c_probe_unsafe_19_~a.base)) (= .cse1 .cse2)))) is different from false [2018-01-21 08:53:29,370 WARN L1007 $PredicateComparison]: unable to prove that (let ((.cse2 (+ c_probe_unsafe_19_~a.offset 4))) (let ((.cse0 (select |c_#valid| 0)) (.cse1 (select (select |c_#memory_$Pointer$.base| c_probe_unsafe_19_~a.base) .cse2))) (and (= .cse0 |c_probe_unsafe_19_#t~mem9.base|) (not (= 0 c_probe_unsafe_19_~a.base)) (= 0 |c_probe_unsafe_19_#t~mem9.offset|) (forall ((v_weq0_1 Int)) (or (not (= v_weq0_1 (+ c_probe_unsafe_19_~a.offset 4))) (= (select (select |c_#memory_$Pointer$.offset| c_probe_unsafe_19_~a.base) v_weq0_1) (select (select |c_#memory_$Pointer$.base| c_probe_unsafe_19_~a.base) v_weq0_1)))) (forall ((v_weq0_1 Int) (v_weq1_1 Int)) (or (not (= v_weq0_1 c_probe_unsafe_19_~a.base)) (not (= v_weq1_1 (+ c_probe_unsafe_19_~a.offset 4))) (= (select (select |c_#memory_$Pointer$.base| v_weq0_1) v_weq1_1) (select (select |c_#memory_$Pointer$.offset| v_weq0_1) v_weq1_1)))) (= |c_probe_unsafe_19_#t~mem9.base| c_probe_unsafe_19_~a.offset) (= .cse1 .cse0) (= c_probe_unsafe_19_~a.offset (select (select |c_#memory_$Pointer$.offset| c_probe_unsafe_19_~a.base) .cse2)) (= |c_probe_unsafe_19_#t~mem9.offset| .cse1) (= 1 (select |c_#valid| c_probe_unsafe_19_~a.base))))) is different from false [2018-01-21 08:53:29,374 INFO L419 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-01-21 08:53:29,375 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-01-21 08:53:29,375 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [13] imperfect sequences [6] total 18 [2018-01-21 08:53:29,375 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 08:53:29,377 INFO L409 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-01-21 08:53:29,377 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-01-21 08:53:29,377 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=91, Unknown=2, NotChecked=42, Total=182 [2018-01-21 08:53:29,378 INFO L87 Difference]: Start difference. First operand 60 states and 65 transitions. Second operand 14 states. Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown