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_precise.epf -i ../../../trunk/examples/svcomp/forester-heap/sll-01_false-unreach-call_false-valid-deref.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-2f49842 [2018-01-21 06:32:22,632 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-21 06:32:22,633 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-21 06:32:22,648 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-21 06:32:22,648 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-21 06:32:22,649 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-21 06:32:22,650 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-21 06:32:22,652 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-21 06:32:22,654 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-21 06:32:22,655 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-21 06:32:22,656 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-01-21 06:32:22,656 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-01-21 06:32:22,657 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-01-21 06:32:22,658 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-01-21 06:32:22,659 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-01-21 06:32:22,661 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-01-21 06:32:22,664 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-01-21 06:32:22,666 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-01-21 06:32:22,667 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-01-21 06:32:22,669 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-01-21 06:32:22,671 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-01-21 06:32:22,671 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-01-21 06:32:22,672 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-01-21 06:32:22,673 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-01-21 06:32:22,674 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-01-21 06:32:22,675 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-01-21 06:32:22,675 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-01-21 06:32:22,676 INFO L177 SettingsManager]: PEA to Boogie provides no preferences, ignoring... [2018-01-21 06:32:22,676 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-01-21 06:32:22,676 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-01-21 06:32:22,677 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-01-21 06:32:22,677 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_precise.epf [2018-01-21 06:32:22,687 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-21 06:32:22,688 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-21 06:32:22,689 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-21 06:32:22,689 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-21 06:32:22,689 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-21 06:32:22,689 INFO L133 SettingsManager]: * Weq Fattening=true [2018-01-21 06:32:22,689 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-21 06:32:22,690 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-21 06:32:22,690 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-21 06:32:22,691 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-21 06:32:22,691 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-21 06:32:22,691 INFO L133 SettingsManager]: * Check allocation purity=true [2018-01-21 06:32:22,691 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-21 06:32:22,691 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-21 06:32:22,691 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-21 06:32:22,692 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-01-21 06:32:22,692 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-21 06:32:22,692 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-01-21 06:32:22,692 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-21 06:32:22,692 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-01-21 06:32:22,693 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-01-21 06:32:22,693 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-21 06:32:22,693 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-01-21 06:32:22,693 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-21 06:32:22,693 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-21 06:32:22,694 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-21 06:32:22,694 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-21 06:32:22,694 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-21 06:32:22,694 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-21 06:32:22,694 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-21 06:32:22,695 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-21 06:32:22,695 INFO L133 SettingsManager]: * Stop after first violation was found=false [2018-01-21 06:32:22,695 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-01-21 06:32:22,695 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-21 06:32:22,695 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-21 06:32:22,696 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-21 06:32:22,696 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-01-21 06:32:22,697 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-21 06:32:22,697 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-21 06:32:22,732 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-21 06:32:22,745 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-21 06:32:22,749 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-21 06:32:22,751 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-21 06:32:22,751 INFO L276 PluginConnector]: CDTParser initialized [2018-01-21 06:32:22,752 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/forester-heap/sll-01_false-unreach-call_false-valid-deref.i [2018-01-21 06:32:22,923 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-21 06:32:22,927 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-21 06:32:22,927 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-21 06:32:22,928 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-21 06:32:22,933 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-21 06:32:22,934 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.01 06:32:22" (1/1) ... [2018-01-21 06:32:22,937 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@39c1589c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 06:32:22, skipping insertion in model container [2018-01-21 06:32:22,937 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.01 06:32:22" (1/1) ... [2018-01-21 06:32:22,951 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-21 06:32:22,992 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-21 06:32:23,120 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-21 06:32:23,147 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-21 06:32:23,159 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 06:32:23 WrapperNode [2018-01-21 06:32:23,159 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-21 06:32:23,160 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-21 06:32:23,160 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-21 06:32:23,160 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-21 06:32:23,174 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 06:32:23" (1/1) ... [2018-01-21 06:32:23,174 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 06:32:23" (1/1) ... [2018-01-21 06:32:23,185 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 06:32:23" (1/1) ... [2018-01-21 06:32:23,185 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 06:32:23" (1/1) ... [2018-01-21 06:32:23,194 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 06:32:23" (1/1) ... [2018-01-21 06:32:23,202 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 06:32:23" (1/1) ... [2018-01-21 06:32:23,204 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 06:32:23" (1/1) ... [2018-01-21 06:32:23,207 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-21 06:32:23,208 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-21 06:32:23,208 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-21 06:32:23,208 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-21 06:32:23,210 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 06:32:23" (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 06:32:23,257 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-21 06:32:23,258 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-21 06:32:23,258 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-21 06:32:23,258 INFO L128 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2018-01-21 06:32:23,258 INFO L128 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2018-01-21 06:32:23,258 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-01-21 06:32:23,258 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-01-21 06:32:23,258 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-01-21 06:32:23,259 INFO L128 BoogieDeclarations]: Found specification of procedure malloc [2018-01-21 06:32:23,259 INFO L128 BoogieDeclarations]: Found specification of procedure free [2018-01-21 06:32:23,259 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-01-21 06:32:23,259 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2018-01-21 06:32:23,259 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-21 06:32:23,259 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-21 06:32:23,260 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-21 06:32:23,665 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-21 06:32:23,665 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.01 06:32:23 BoogieIcfgContainer [2018-01-21 06:32:23,666 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-21 06:32:23,666 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-01-21 06:32:23,666 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-01-21 06:32:23,668 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-01-21 06:32:23,668 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.01 06:32:22" (1/3) ... [2018-01-21 06:32:23,669 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b62b6df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.01 06:32:23, skipping insertion in model container [2018-01-21 06:32:23,670 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 06:32:23" (2/3) ... [2018-01-21 06:32:23,670 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b62b6df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.01 06:32:23, skipping insertion in model container [2018-01-21 06:32:23,670 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.01 06:32:23" (3/3) ... [2018-01-21 06:32:23,671 INFO L105 eAbstractionObserver]: Analyzing ICFG sll-01_false-unreach-call_false-valid-deref.i [2018-01-21 06:32:23,678 INFO L130 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-01-21 06:32:23,684 INFO L142 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2018-01-21 06:32:23,732 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 06:32:23,732 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 06:32:23,732 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 06:32:23,732 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 06:32:23,732 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 06:32:23,732 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 06:32:23,733 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 06:32:23,733 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.initErr0EnsuresViolation======== [2018-01-21 06:32:23,733 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 06:32:23,752 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states. [2018-01-21 06:32:23,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-01-21 06:32:23,756 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 06:32:23,757 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-01-21 06:32:23,757 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.initErr0EnsuresViolation]=== [2018-01-21 06:32:23,761 INFO L82 PathProgramCache]: Analyzing trace with hash 400739, now seen corresponding path program 1 times [2018-01-21 06:32:23,763 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 06:32:23,806 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 06:32:23,807 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 06:32:23,807 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 06:32:23,807 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 06:32:23,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 06:32:23,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 06:32:23,866 INFO L381 BasicCegarLoop]: Counterexample might be feasible [2018-01-21 06:32:23,872 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 06:32:23,879 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 06:32:23,879 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 06:32:23,879 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 06:32:23,879 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 06:32:23,880 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 06:32:23,880 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 06:32:23,880 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 06:32:23,880 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.startErr0EnsuresViolation======== [2018-01-21 06:32:23,880 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 06:32:23,884 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states. [2018-01-21 06:32:23,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-01-21 06:32:23,886 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 06:32:23,886 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] [2018-01-21 06:32:23,887 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 06:32:23,887 INFO L82 PathProgramCache]: Analyzing trace with hash -63616992, now seen corresponding path program 1 times [2018-01-21 06:32:23,887 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 06:32:23,888 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 06:32:23,888 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 06:32:23,888 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 06:32:23,888 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 06:32:23,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 06:32:23,909 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 06:32:23,949 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 06:32:23,951 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 06:32:23,951 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-21 06:32:23,951 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 06:32:23,955 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-21 06:32:24,052 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-21 06:32:24,052 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-21 06:32:24,055 INFO L87 Difference]: Start difference. First operand 126 states. Second operand 2 states. [2018-01-21 06:32:24,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 06:32:24,080 INFO L93 Difference]: Finished difference Result 243 states and 349 transitions. [2018-01-21 06:32:24,080 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-21 06:32:24,081 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 23 [2018-01-21 06:32:24,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 06:32:24,094 INFO L225 Difference]: With dead ends: 243 [2018-01-21 06:32:24,095 INFO L226 Difference]: Without dead ends: 123 [2018-01-21 06:32:24,098 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 06:32:24,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2018-01-21 06:32:24,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2018-01-21 06:32:24,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2018-01-21 06:32:24,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 133 transitions. [2018-01-21 06:32:24,138 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 133 transitions. Word has length 23 [2018-01-21 06:32:24,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 06:32:24,138 INFO L432 AbstractCegarLoop]: Abstraction has 123 states and 133 transitions. [2018-01-21 06:32:24,138 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-21 06:32:24,138 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 133 transitions. [2018-01-21 06:32:24,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-01-21 06:32:24,140 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 06:32:24,140 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 06:32:24,140 INFO L371 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 06:32:24,140 INFO L82 PathProgramCache]: Analyzing trace with hash -980023246, now seen corresponding path program 1 times [2018-01-21 06:32:24,140 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 06:32:24,141 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 06:32:24,141 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 06:32:24,141 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 06:32:24,141 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 06:32:24,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 06:32:24,166 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 06:32:24,325 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 06:32:24,325 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 06:32:24,326 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-21 06:32:24,326 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 06:32:24,327 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-21 06:32:24,328 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-21 06:32:24,328 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-01-21 06:32:24,328 INFO L87 Difference]: Start difference. First operand 123 states and 133 transitions. Second operand 5 states. [2018-01-21 06:32:24,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 06:32:24,684 INFO L93 Difference]: Finished difference Result 289 states and 315 transitions. [2018-01-21 06:32:24,684 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-01-21 06:32:24,684 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 36 [2018-01-21 06:32:24,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 06:32:24,688 INFO L225 Difference]: With dead ends: 289 [2018-01-21 06:32:24,688 INFO L226 Difference]: Without dead ends: 194 [2018-01-21 06:32:24,689 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-01-21 06:32:24,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2018-01-21 06:32:24,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 127. [2018-01-21 06:32:24,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2018-01-21 06:32:24,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 137 transitions. [2018-01-21 06:32:24,698 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 137 transitions. Word has length 36 [2018-01-21 06:32:24,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 06:32:24,699 INFO L432 AbstractCegarLoop]: Abstraction has 127 states and 137 transitions. [2018-01-21 06:32:24,699 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-21 06:32:24,699 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 137 transitions. [2018-01-21 06:32:24,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-01-21 06:32:24,700 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 06:32:24,700 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] [2018-01-21 06:32:24,700 INFO L371 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 06:32:24,700 INFO L82 PathProgramCache]: Analyzing trace with hash -465624459, now seen corresponding path program 1 times [2018-01-21 06:32:24,700 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 06:32:24,701 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 06:32:24,701 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 06:32:24,701 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 06:32:24,701 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 06:32:24,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 06:32:24,717 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 06:32:24,771 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 06:32:24,771 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 06:32:24,772 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-21 06:32:24,772 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 06:32:24,772 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-21 06:32:24,772 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-21 06:32:24,773 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-01-21 06:32:24,773 INFO L87 Difference]: Start difference. First operand 127 states and 137 transitions. Second operand 5 states. [2018-01-21 06:32:24,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 06:32:24,886 INFO L93 Difference]: Finished difference Result 212 states and 230 transitions. [2018-01-21 06:32:24,886 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-21 06:32:24,886 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 38 [2018-01-21 06:32:24,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 06:32:24,889 INFO L225 Difference]: With dead ends: 212 [2018-01-21 06:32:24,889 INFO L226 Difference]: Without dead ends: 185 [2018-01-21 06:32:24,890 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 06:32:24,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2018-01-21 06:32:24,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 131. [2018-01-21 06:32:24,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2018-01-21 06:32:24,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 141 transitions. [2018-01-21 06:32:24,904 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 141 transitions. Word has length 38 [2018-01-21 06:32:24,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 06:32:24,905 INFO L432 AbstractCegarLoop]: Abstraction has 131 states and 141 transitions. [2018-01-21 06:32:24,905 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-21 06:32:24,905 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 141 transitions. [2018-01-21 06:32:24,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-01-21 06:32:24,907 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 06:32:24,908 INFO L322 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1] [2018-01-21 06:32:24,908 INFO L371 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 06:32:24,908 INFO L82 PathProgramCache]: Analyzing trace with hash 700231337, now seen corresponding path program 1 times [2018-01-21 06:32:24,908 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 06:32:24,909 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 06:32:24,910 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 06:32:24,910 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 06:32:24,910 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 06:32:24,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 06:32:24,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 06:32:24,972 INFO L381 BasicCegarLoop]: Counterexample might be feasible [2018-01-21 06:32:24,984 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 06:32:24,995 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 06:32:24,995 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 06:32:25,015 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 06:32:25,015 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 06:32:25,015 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 06:32:25,015 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 06:32:25,015 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 06:32:25,016 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 06:32:25,016 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 06:32:25,016 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == mainErr0EnsuresViolation======== [2018-01-21 06:32:25,016 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 06:32:25,018 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states. [2018-01-21 06:32:25,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-01-21 06:32:25,020 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 06:32:25,020 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] [2018-01-21 06:32:25,020 INFO L371 AbstractCegarLoop]: === Iteration 1 === [mainErr0EnsuresViolation]=== [2018-01-21 06:32:25,020 INFO L82 PathProgramCache]: Analyzing trace with hash -1135260480, now seen corresponding path program 1 times [2018-01-21 06:32:25,020 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 06:32:25,022 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 06:32:25,022 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 06:32:25,022 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 06:32:25,022 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 06:32:25,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 06:32:25,029 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 06:32:25,038 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 06:32:25,038 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 06:32:25,038 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-21 06:32:25,038 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 06:32:25,039 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-21 06:32:25,039 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-21 06:32:25,039 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-21 06:32:25,039 INFO L87 Difference]: Start difference. First operand 126 states. Second operand 2 states. [2018-01-21 06:32:25,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 06:32:25,045 INFO L93 Difference]: Finished difference Result 243 states and 349 transitions. [2018-01-21 06:32:25,046 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-21 06:32:25,046 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 21 [2018-01-21 06:32:25,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 06:32:25,047 INFO L225 Difference]: With dead ends: 243 [2018-01-21 06:32:25,047 INFO L226 Difference]: Without dead ends: 121 [2018-01-21 06:32:25,048 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 06:32:25,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2018-01-21 06:32:25,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2018-01-21 06:32:25,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2018-01-21 06:32:25,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 131 transitions. [2018-01-21 06:32:25,057 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 131 transitions. Word has length 21 [2018-01-21 06:32:25,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 06:32:25,057 INFO L432 AbstractCegarLoop]: Abstraction has 121 states and 131 transitions. [2018-01-21 06:32:25,057 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-21 06:32:25,057 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 131 transitions. [2018-01-21 06:32:25,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-01-21 06:32:25,058 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 06:32:25,058 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] [2018-01-21 06:32:25,059 INFO L371 AbstractCegarLoop]: === Iteration 2 === [mainErr0EnsuresViolation]=== [2018-01-21 06:32:25,059 INFO L82 PathProgramCache]: Analyzing trace with hash 1152051538, now seen corresponding path program 1 times [2018-01-21 06:32:25,059 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 06:32:25,060 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 06:32:25,060 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 06:32:25,060 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 06:32:25,060 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 06:32:25,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 06:32:25,071 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 06:32:25,131 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 06:32:25,131 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 06:32:25,131 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-21 06:32:25,132 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 06:32:25,132 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-21 06:32:25,132 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-21 06:32:25,132 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-01-21 06:32:25,132 INFO L87 Difference]: Start difference. First operand 121 states and 131 transitions. Second operand 5 states. [2018-01-21 06:32:25,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 06:32:25,261 INFO L93 Difference]: Finished difference Result 285 states and 310 transitions. [2018-01-21 06:32:25,261 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-01-21 06:32:25,261 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 34 [2018-01-21 06:32:25,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 06:32:25,263 INFO L225 Difference]: With dead ends: 285 [2018-01-21 06:32:25,263 INFO L226 Difference]: Without dead ends: 192 [2018-01-21 06:32:25,264 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 06:32:25,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2018-01-21 06:32:25,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 125. [2018-01-21 06:32:25,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2018-01-21 06:32:25,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 135 transitions. [2018-01-21 06:32:25,274 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 135 transitions. Word has length 34 [2018-01-21 06:32:25,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 06:32:25,275 INFO L432 AbstractCegarLoop]: Abstraction has 125 states and 135 transitions. [2018-01-21 06:32:25,275 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-21 06:32:25,275 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 135 transitions. [2018-01-21 06:32:25,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-01-21 06:32:25,276 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 06:32:25,277 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 06:32:25,278 INFO L371 AbstractCegarLoop]: === Iteration 3 === [mainErr0EnsuresViolation]=== [2018-01-21 06:32:25,278 INFO L82 PathProgramCache]: Analyzing trace with hash -934561707, now seen corresponding path program 1 times [2018-01-21 06:32:25,279 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 06:32:25,279 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 06:32:25,280 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 06:32:25,280 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 06:32:25,280 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 06:32:25,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 06:32:25,291 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 06:32:25,342 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 06:32:25,342 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 06:32:25,342 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-21 06:32:25,342 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 06:32:25,343 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-21 06:32:25,343 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-21 06:32:25,344 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-01-21 06:32:25,344 INFO L87 Difference]: Start difference. First operand 125 states and 135 transitions. Second operand 5 states. [2018-01-21 06:32:25,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 06:32:25,469 INFO L93 Difference]: Finished difference Result 208 states and 226 transitions. [2018-01-21 06:32:25,488 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-21 06:32:25,488 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 36 [2018-01-21 06:32:25,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 06:32:25,490 INFO L225 Difference]: With dead ends: 208 [2018-01-21 06:32:25,490 INFO L226 Difference]: Without dead ends: 183 [2018-01-21 06:32:25,491 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 06:32:25,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2018-01-21 06:32:25,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 129. [2018-01-21 06:32:25,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2018-01-21 06:32:25,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 139 transitions. [2018-01-21 06:32:25,499 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 139 transitions. Word has length 36 [2018-01-21 06:32:25,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 06:32:25,500 INFO L432 AbstractCegarLoop]: Abstraction has 129 states and 139 transitions. [2018-01-21 06:32:25,500 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-21 06:32:25,500 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 139 transitions. [2018-01-21 06:32:25,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-01-21 06:32:25,502 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 06:32:25,502 INFO L322 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2018-01-21 06:32:25,502 INFO L371 AbstractCegarLoop]: === Iteration 4 === [mainErr0EnsuresViolation]=== [2018-01-21 06:32:25,502 INFO L82 PathProgramCache]: Analyzing trace with hash -1469660791, now seen corresponding path program 1 times [2018-01-21 06:32:25,502 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 06:32:25,503 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 06:32:25,503 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 06:32:25,503 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 06:32:25,503 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 06:32:25,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 06:32:25,522 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 06:32:25,680 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 06:32:25,681 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 06:32:25,681 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-21 06:32:25,682 INFO L199 CegarAbsIntRunner]: Running AI on error trace of length 57 with the following transitions: [2018-01-21 06:32:25,683 INFO L201 CegarAbsIntRunner]: [0], [1], [7], [8], [9], [13], [18], [22], [28], [31], [32], [46], [47], [48], [53], [54], [55], [61], [65], [71], [75], [77], [80], [169], [173], [178], [182], [190], [194], [196], [197], [198], [202], [206], [283], [288], [292], [298], [299], [305], [309], [311], [312], [313], [374], [376], [377], [378], [379], [383], [385], [386], [387], [388] [2018-01-21 06:32:25,729 INFO L147 AbstractInterpreter]: Using domain VPDomain [2018-01-21 06:32:25,730 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