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/forester-heap/dll-reverse_true-unreach-call_true-valid-memsafety.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-2f49842 [2018-01-21 09:07:21,739 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-21 09:07:21,740 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-21 09:07:21,755 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-21 09:07:21,755 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-21 09:07:21,756 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-21 09:07:21,757 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-21 09:07:21,759 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-21 09:07:21,761 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-21 09:07:21,762 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-21 09:07:21,763 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-01-21 09:07:21,763 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-01-21 09:07:21,764 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-01-21 09:07:21,765 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-01-21 09:07:21,765 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-01-21 09:07:21,768 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-01-21 09:07:21,770 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-01-21 09:07:21,773 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-01-21 09:07:21,774 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-01-21 09:07:21,775 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-01-21 09:07:21,778 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-01-21 09:07:21,783 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-01-21 09:07:21,784 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-01-21 09:07:21,785 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 09:07:21,799 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-21 09:07:21,799 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-21 09:07:21,800 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-21 09:07:21,800 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-21 09:07:21,800 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-21 09:07:21,801 INFO L133 SettingsManager]: * Weq Fattening=true [2018-01-21 09:07:21,801 INFO L133 SettingsManager]: * Flatten before fatten=true [2018-01-21 09:07:21,801 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-21 09:07:21,801 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-21 09:07:21,802 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-21 09:07:21,802 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-21 09:07:21,802 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-21 09:07:21,802 INFO L133 SettingsManager]: * Check allocation purity=true [2018-01-21 09:07:21,802 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-21 09:07:21,803 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-21 09:07:21,803 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-21 09:07:21,803 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-01-21 09:07:21,803 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-21 09:07:21,803 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-01-21 09:07:21,804 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-21 09:07:21,804 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-01-21 09:07:21,804 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-01-21 09:07:21,804 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-21 09:07:21,804 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-01-21 09:07:21,804 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-21 09:07:21,805 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-21 09:07:21,805 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-21 09:07:21,805 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-21 09:07:21,805 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-21 09:07:21,805 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-21 09:07:21,806 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-21 09:07:21,806 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-21 09:07:21,806 INFO L133 SettingsManager]: * Stop after first violation was found=false [2018-01-21 09:07:21,806 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-01-21 09:07:21,806 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-21 09:07:21,807 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-21 09:07:21,807 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-21 09:07:21,807 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-01-21 09:07:21,808 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-21 09:07:21,808 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-21 09:07:21,843 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-21 09:07:21,891 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-21 09:07:21,895 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-21 09:07:21,896 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-21 09:07:21,896 INFO L276 PluginConnector]: CDTParser initialized [2018-01-21 09:07:21,897 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/forester-heap/dll-reverse_true-unreach-call_true-valid-memsafety.i [2018-01-21 09:07:22,072 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-21 09:07:22,077 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-21 09:07:22,078 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-21 09:07:22,078 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-21 09:07:22,086 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-21 09:07:22,087 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.01 09:07:22" (1/1) ... [2018-01-21 09:07:22,091 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6479bd29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 09:07:22, skipping insertion in model container [2018-01-21 09:07:22,091 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.01 09:07:22" (1/1) ... [2018-01-21 09:07:22,107 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-21 09:07:22,148 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-21 09:07:22,271 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-21 09:07:22,296 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-21 09:07:22,304 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 09:07:22 WrapperNode [2018-01-21 09:07:22,305 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-21 09:07:22,305 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-21 09:07:22,305 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-21 09:07:22,305 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-21 09:07:22,318 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 09:07:22" (1/1) ... [2018-01-21 09:07:22,318 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 09:07:22" (1/1) ... [2018-01-21 09:07:22,331 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 09:07:22" (1/1) ... [2018-01-21 09:07:22,331 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 09:07:22" (1/1) ... [2018-01-21 09:07:22,338 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 09:07:22" (1/1) ... [2018-01-21 09:07:22,343 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 09:07:22" (1/1) ... [2018-01-21 09:07:22,345 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 09:07:22" (1/1) ... [2018-01-21 09:07:22,347 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-21 09:07:22,348 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-21 09:07:22,348 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-21 09:07:22,348 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-21 09:07:22,349 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 09:07:22" (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 09:07:22,425 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-21 09:07:22,425 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-21 09:07:22,426 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-21 09:07:22,426 INFO L128 BoogieDeclarations]: Found specification of procedure write~int [2018-01-21 09:07:22,426 INFO L128 BoogieDeclarations]: Found specification of procedure read~int [2018-01-21 09:07:22,426 INFO L128 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2018-01-21 09:07:22,426 INFO L128 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2018-01-21 09:07:22,427 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-01-21 09:07:22,427 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-01-21 09:07:22,427 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-01-21 09:07:22,427 INFO L128 BoogieDeclarations]: Found specification of procedure malloc [2018-01-21 09:07:22,427 INFO L128 BoogieDeclarations]: Found specification of procedure free [2018-01-21 09:07:22,427 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-01-21 09:07:22,427 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2018-01-21 09:07:22,428 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-21 09:07:22,428 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-21 09:07:22,428 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-21 09:07:22,829 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-21 09:07:22,830 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.01 09:07:22 BoogieIcfgContainer [2018-01-21 09:07:22,830 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-21 09:07:22,831 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-01-21 09:07:22,831 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-01-21 09:07:22,833 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-01-21 09:07:22,833 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.01 09:07:22" (1/3) ... [2018-01-21 09:07:22,834 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31cf3f68 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.01 09:07:22, skipping insertion in model container [2018-01-21 09:07:22,834 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 09:07:22" (2/3) ... [2018-01-21 09:07:22,834 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31cf3f68 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.01 09:07:22, skipping insertion in model container [2018-01-21 09:07:22,834 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.01 09:07:22" (3/3) ... [2018-01-21 09:07:22,836 INFO L105 eAbstractionObserver]: Analyzing ICFG dll-reverse_true-unreach-call_true-valid-memsafety.i [2018-01-21 09:07:22,843 INFO L130 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-01-21 09:07:22,862 INFO L142 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2018-01-21 09:07:22,901 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 09:07:22,901 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 09:07:22,901 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 09:07:22,901 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 09:07:22,901 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 09:07:22,902 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 09:07:22,902 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 09:07:22,902 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.initErr0EnsuresViolation======== [2018-01-21 09:07:22,902 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 09:07:22,920 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states. [2018-01-21 09:07:22,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-01-21 09:07:22,926 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 09:07:22,927 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-01-21 09:07:22,927 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.initErr0EnsuresViolation]=== [2018-01-21 09:07:22,931 INFO L82 PathProgramCache]: Analyzing trace with hash 235120, now seen corresponding path program 1 times [2018-01-21 09:07:22,933 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 09:07:22,974 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 09:07:22,974 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 09:07:22,975 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 09:07:22,975 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 09:07:23,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 09:07:23,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 09:07:23,025 INFO L381 BasicCegarLoop]: Counterexample might be feasible [2018-01-21 09:07:23,032 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 09:07:23,039 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 09:07:23,039 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 09:07:23,039 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 09:07:23,039 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 09:07:23,040 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 09:07:23,040 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 09:07:23,040 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 09:07:23,040 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.startErr0EnsuresViolation======== [2018-01-21 09:07:23,040 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 09:07:23,044 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states. [2018-01-21 09:07:23,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-01-21 09:07:23,046 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 09:07:23,047 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] [2018-01-21 09:07:23,047 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 09:07:23,047 INFO L82 PathProgramCache]: Analyzing trace with hash -1114673319, now seen corresponding path program 1 times [2018-01-21 09:07:23,047 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 09:07:23,048 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 09:07:23,048 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 09:07:23,048 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 09:07:23,048 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 09:07:23,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 09:07:23,087 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 09:07:23,219 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 09:07:23,221 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 09:07:23,221 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-21 09:07:23,222 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 09:07:23,225 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-21 09:07:23,240 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-21 09:07:23,241 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-21 09:07:23,243 INFO L87 Difference]: Start difference. First operand 92 states. Second operand 2 states. [2018-01-21 09:07:23,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 09:07:23,272 INFO L93 Difference]: Finished difference Result 160 states and 202 transitions. [2018-01-21 09:07:23,272 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-21 09:07:23,273 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 31 [2018-01-21 09:07:23,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 09:07:23,286 INFO L225 Difference]: With dead ends: 160 [2018-01-21 09:07:23,286 INFO L226 Difference]: Without dead ends: 89 [2018-01-21 09:07:23,290 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 09:07:23,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-01-21 09:07:23,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2018-01-21 09:07:23,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-01-21 09:07:23,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 97 transitions. [2018-01-21 09:07:23,327 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 97 transitions. Word has length 31 [2018-01-21 09:07:23,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 09:07:23,327 INFO L432 AbstractCegarLoop]: Abstraction has 89 states and 97 transitions. [2018-01-21 09:07:23,327 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-21 09:07:23,327 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 97 transitions. [2018-01-21 09:07:23,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-01-21 09:07:23,329 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 09:07:23,329 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, 1, 1, 1, 1, 1, 1] [2018-01-21 09:07:23,329 INFO L371 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 09:07:23,329 INFO L82 PathProgramCache]: Analyzing trace with hash 584524918, now seen corresponding path program 1 times [2018-01-21 09:07:23,329 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 09:07:23,330 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 09:07:23,330 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 09:07:23,330 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 09:07:23,331 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 09:07:23,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 09:07:23,368 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 09:07:23,718 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 09:07:23,718 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 09:07:23,718 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2018-01-21 09:07:23,718 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 09:07:23,720 INFO L409 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-01-21 09:07:23,720 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-01-21 09:07:23,720 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2018-01-21 09:07:23,721 INFO L87 Difference]: Start difference. First operand 89 states and 97 transitions. Second operand 7 states. [2018-01-21 09:07:23,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 09:07:23,998 INFO L93 Difference]: Finished difference Result 173 states and 192 transitions. [2018-01-21 09:07:23,999 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-01-21 09:07:23,999 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 42 [2018-01-21 09:07:23,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 09:07:24,004 INFO L225 Difference]: With dead ends: 173 [2018-01-21 09:07:24,005 INFO L226 Difference]: Without dead ends: 133 [2018-01-21 09:07:24,006 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2018-01-21 09:07:24,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2018-01-21 09:07:24,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 104. [2018-01-21 09:07:24,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2018-01-21 09:07:24,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 115 transitions. [2018-01-21 09:07:24,019 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 115 transitions. Word has length 42 [2018-01-21 09:07:24,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 09:07:24,019 INFO L432 AbstractCegarLoop]: Abstraction has 104 states and 115 transitions. [2018-01-21 09:07:24,019 INFO L433 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-01-21 09:07:24,020 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 115 transitions. [2018-01-21 09:07:24,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-01-21 09:07:24,021 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 09:07:24,022 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 09:07:24,022 INFO L371 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 09:07:24,022 INFO L82 PathProgramCache]: Analyzing trace with hash 224754963, now seen corresponding path program 1 times [2018-01-21 09:07:24,022 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 09:07:24,023 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 09:07:24,024 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 09:07:24,024 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 09:07:24,024 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 09:07:24,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 09:07:24,048 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 09:07:24,172 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 09:07:24,172 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 09:07:24,172 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-01-21 09:07:24,173 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 09:07:24,173 INFO L409 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-01-21 09:07:24,173 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-01-21 09:07:24,173 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-01-21 09:07:24,174 INFO L87 Difference]: Start difference. First operand 104 states and 115 transitions. Second operand 6 states. [2018-01-21 09:07:24,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 09:07:24,393 INFO L93 Difference]: Finished difference Result 166 states and 184 transitions. [2018-01-21 09:07:24,393 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-01-21 09:07:24,393 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 48 [2018-01-21 09:07:24,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 09:07:24,396 INFO L225 Difference]: With dead ends: 166 [2018-01-21 09:07:24,396 INFO L226 Difference]: Without dead ends: 114 [2018-01-21 09:07:24,397 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2018-01-21 09:07:24,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2018-01-21 09:07:24,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 112. [2018-01-21 09:07:24,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2018-01-21 09:07:24,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 124 transitions. [2018-01-21 09:07:24,409 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 124 transitions. Word has length 48 [2018-01-21 09:07:24,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 09:07:24,409 INFO L432 AbstractCegarLoop]: Abstraction has 112 states and 124 transitions. [2018-01-21 09:07:24,409 INFO L433 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-01-21 09:07:24,409 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 124 transitions. [2018-01-21 09:07:24,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-01-21 09:07:24,411 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 09:07:24,411 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 09:07:24,412 INFO L371 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 09:07:24,412 INFO L82 PathProgramCache]: Analyzing trace with hash 247387217, now seen corresponding path program 1 times [2018-01-21 09:07:24,412 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 09:07:24,413 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 09:07:24,413 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 09:07:24,413 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 09:07:24,414 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 09:07:24,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 09:07:24,434 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 09:07:24,498 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 09:07:24,498 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 09:07:24,498 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-21 09:07:24,498 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 09:07:24,499 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-21 09:07:24,499 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-21 09:07:24,499 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-01-21 09:07:24,500 INFO L87 Difference]: Start difference. First operand 112 states and 124 transitions. Second operand 5 states. [2018-01-21 09:07:24,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 09:07:24,703 INFO L93 Difference]: Finished difference Result 189 states and 209 transitions. [2018-01-21 09:07:24,704 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-21 09:07:24,704 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 48 [2018-01-21 09:07:24,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 09:07:24,707 INFO L225 Difference]: With dead ends: 189 [2018-01-21 09:07:24,707 INFO L226 Difference]: Without dead ends: 160 [2018-01-21 09:07:24,708 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-01-21 09:07:24,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2018-01-21 09:07:24,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 114. [2018-01-21 09:07:24,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2018-01-21 09:07:24,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 126 transitions. [2018-01-21 09:07:24,726 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 126 transitions. Word has length 48 [2018-01-21 09:07:24,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 09:07:24,727 INFO L432 AbstractCegarLoop]: Abstraction has 114 states and 126 transitions. [2018-01-21 09:07:24,727 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-21 09:07:24,727 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 126 transitions. [2018-01-21 09:07:24,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-01-21 09:07:24,728 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 09:07:24,728 INFO L322 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1] [2018-01-21 09:07:24,729 INFO L371 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 09:07:24,729 INFO L82 PathProgramCache]: Analyzing trace with hash -24407250, now seen corresponding path program 1 times [2018-01-21 09:07:24,729 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 09:07:24,730 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 09:07:24,730 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 09:07:24,730 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 09:07:24,730 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 09:07:24,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 09:07:24,750 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 09:07:24,821 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-21 09:07:24,821 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 09:07:24,821 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-21 09:07:24,822 INFO L199 CegarAbsIntRunner]: Running AI on error trace of length 56 with the following transitions: [2018-01-21 09:07:24,824 INFO L201 CegarAbsIntRunner]: [0], [1], [2], [3], [4], [5], [9], [11], [14], [29], [33], [35], [36], [41], [45], [73], [78], [82], [88], [89], [92], [93], [94], [95], [96], [97], [98], [99], [100], [101], [108], [112], [116], [118], [119], [120], [121], [122], [123], [127], [131], [135], [180], [184], [188], [197], [198], [200], [201], [206], [207], [208], [209], [210] [2018-01-21 09:07:24,911 INFO L147 AbstractInterpreter]: Using domain VPDomain [2018-01-21 09:07:24,912 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