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/list-ext-properties/list-ext_flag_1_true-valid-memsafety.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-2f49842 [2018-01-21 08:37:49,673 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-21 08:37:49,676 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-21 08:37:49,689 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-21 08:37:49,689 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-21 08:37:49,690 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-21 08:37:49,691 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-21 08:37:49,693 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-21 08:37:49,694 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-21 08:37:49,695 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-21 08:37:49,696 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-01-21 08:37:49,696 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-01-21 08:37:49,696 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-01-21 08:37:49,697 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-01-21 08:37:49,698 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-01-21 08:37:49,701 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-01-21 08:37:49,703 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-01-21 08:37:49,705 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-01-21 08:37:49,706 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-01-21 08:37:49,708 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-01-21 08:37:49,710 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-01-21 08:37:49,710 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-01-21 08:37:49,711 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-01-21 08:37:49,712 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-01-21 08:37:49,713 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-01-21 08:37:49,714 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-01-21 08:37:49,714 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-01-21 08:37:49,715 INFO L177 SettingsManager]: PEA to Boogie provides no preferences, ignoring... [2018-01-21 08:37:49,715 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-01-21 08:37:49,715 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-01-21 08:37:49,716 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-01-21 08:37:49,717 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/eq-bench/mempurity-32bit-Automizer_Taipan+AI_EQ_preciseopt.epf [2018-01-21 08:37:49,727 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-21 08:37:49,728 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-21 08:37:49,728 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-21 08:37:49,729 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-21 08:37:49,729 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-21 08:37:49,729 INFO L133 SettingsManager]: * Weq Fattening=true [2018-01-21 08:37:49,729 INFO L133 SettingsManager]: * Flatten before fatten=true [2018-01-21 08:37:49,730 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-21 08:37:49,730 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-21 08:37:49,731 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-21 08:37:49,731 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-21 08:37:49,731 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-21 08:37:49,731 INFO L133 SettingsManager]: * Check allocation purity=true [2018-01-21 08:37:49,731 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-21 08:37:49,732 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-21 08:37:49,732 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-21 08:37:49,732 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-01-21 08:37:49,732 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-21 08:37:49,732 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-01-21 08:37:49,732 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-21 08:37:49,733 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-01-21 08:37:49,733 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-01-21 08:37:49,733 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-21 08:37:49,733 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-01-21 08:37:49,734 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-21 08:37:49,734 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-21 08:37:49,734 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-21 08:37:49,734 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-21 08:37:49,734 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-21 08:37:49,735 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-21 08:37:49,735 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-21 08:37:49,735 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-21 08:37:49,735 INFO L133 SettingsManager]: * Stop after first violation was found=false [2018-01-21 08:37:49,735 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-01-21 08:37:49,736 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-21 08:37:49,736 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-21 08:37:49,736 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-21 08:37:49,736 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-01-21 08:37:49,737 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-21 08:37:49,737 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-21 08:37:49,773 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-21 08:37:49,784 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-21 08:37:49,787 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-21 08:37:49,788 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-21 08:37:49,789 INFO L276 PluginConnector]: CDTParser initialized [2018-01-21 08:37:49,789 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-ext-properties/list-ext_flag_1_true-valid-memsafety.i [2018-01-21 08:37:49,967 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-21 08:37:49,972 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-21 08:37:49,973 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-21 08:37:49,973 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-21 08:37:49,978 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-21 08:37:49,979 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.01 08:37:49" (1/1) ... [2018-01-21 08:37:49,981 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3724a30 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 08:37:49, skipping insertion in model container [2018-01-21 08:37:49,982 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.01 08:37:49" (1/1) ... [2018-01-21 08:37:49,997 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-21 08:37:50,034 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-21 08:37:50,155 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-21 08:37:50,174 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-21 08:37:50,182 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 08:37:50 WrapperNode [2018-01-21 08:37:50,182 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-21 08:37:50,183 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-21 08:37:50,183 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-21 08:37:50,183 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-21 08:37:50,196 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 08:37:50" (1/1) ... [2018-01-21 08:37:50,196 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 08:37:50" (1/1) ... [2018-01-21 08:37:50,209 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 08:37:50" (1/1) ... [2018-01-21 08:37:50,209 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 08:37:50" (1/1) ... [2018-01-21 08:37:50,213 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 08:37:50" (1/1) ... [2018-01-21 08:37:50,216 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 08:37:50" (1/1) ... [2018-01-21 08:37:50,218 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 08:37:50" (1/1) ... [2018-01-21 08:37:50,219 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-21 08:37:50,220 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-21 08:37:50,220 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-21 08:37:50,220 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-21 08:37:50,221 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 08:37:50" (1/1) ... No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-21 08:37:50,272 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-21 08:37:50,273 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-21 08:37:50,273 INFO L136 BoogieDeclarations]: Found implementation of procedure exit [2018-01-21 08:37:50,273 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-21 08:37:50,273 INFO L128 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2018-01-21 08:37:50,273 INFO L128 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2018-01-21 08:37:50,273 INFO L128 BoogieDeclarations]: Found specification of procedure write~int [2018-01-21 08:37:50,273 INFO L128 BoogieDeclarations]: Found specification of procedure read~int [2018-01-21 08:37:50,274 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-01-21 08:37:50,274 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-01-21 08:37:50,274 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-01-21 08:37:50,274 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2018-01-21 08:37:50,274 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-01-21 08:37:50,274 INFO L128 BoogieDeclarations]: Found specification of procedure malloc [2018-01-21 08:37:50,275 INFO L128 BoogieDeclarations]: Found specification of procedure free [2018-01-21 08:37:50,275 INFO L128 BoogieDeclarations]: Found specification of procedure exit [2018-01-21 08:37:50,275 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-21 08:37:50,275 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-21 08:37:50,275 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-21 08:37:50,545 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-21 08:37:50,545 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.01 08:37:50 BoogieIcfgContainer [2018-01-21 08:37:50,545 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-21 08:37:50,546 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-01-21 08:37:50,546 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-01-21 08:37:50,548 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-01-21 08:37:50,548 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.01 08:37:49" (1/3) ... [2018-01-21 08:37:50,549 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@447264b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.01 08:37:50, skipping insertion in model container [2018-01-21 08:37:50,550 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 08:37:50" (2/3) ... [2018-01-21 08:37:50,550 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@447264b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.01 08:37:50, skipping insertion in model container [2018-01-21 08:37:50,550 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.01 08:37:50" (3/3) ... [2018-01-21 08:37:50,551 INFO L105 eAbstractionObserver]: Analyzing ICFG list-ext_flag_1_true-valid-memsafety.i [2018-01-21 08:37:50,559 INFO L130 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-01-21 08:37:50,566 INFO L142 ceAbstractionStarter]: Appying trace abstraction to program that has 4 error locations. [2018-01-21 08:37:50,617 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 08:37:50,617 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 08:37:50,617 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 08:37:50,618 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 08:37:50,618 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 08:37:50,618 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 08:37:50,618 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 08:37:50,618 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == exitErr0EnsuresViolation======== [2018-01-21 08:37:50,619 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 08:37:50,641 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states. [2018-01-21 08:37:50,649 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-01-21 08:37:50,660 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 63 states. [2018-01-21 08:37:50,755 INFO L401 ceAbstractionStarter]: For program point exitErr0EnsuresViolation(line 525) no Hoare annotation was computed. [2018-01-21 08:37:50,755 INFO L401 ceAbstractionStarter]: For program point exitFINAL(lines 619 621) no Hoare annotation was computed. [2018-01-21 08:37:50,756 INFO L404 ceAbstractionStarter]: At program point exitENTRY(lines 619 621) the Hoare annotation is: true [2018-01-21 08:37:50,756 INFO L401 ceAbstractionStarter]: For program point L620(line 620) no Hoare annotation was computed. [2018-01-21 08:37:50,756 INFO L401 ceAbstractionStarter]: For program point exitEXIT(lines 619 621) no Hoare annotation was computed. [2018-01-21 08:37:50,756 INFO L401 ceAbstractionStarter]: For program point ULTIMATE.initErr0EnsuresViolation(lines 1 672) no Hoare annotation was computed. [2018-01-21 08:37:50,757 INFO L401 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(lines 1 672) no Hoare annotation was computed. [2018-01-21 08:37:50,757 INFO L404 ceAbstractionStarter]: At program point ULTIMATE.initENTRY(lines 1 672) the Hoare annotation is: true [2018-01-21 08:37:50,757 INFO L401 ceAbstractionStarter]: For program point ULTIMATE.initFINAL(lines 1 672) no Hoare annotation was computed. [2018-01-21 08:37:50,757 INFO L404 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(lines 1 672) the Hoare annotation is: true [2018-01-21 08:37:50,758 INFO L401 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(lines 1 672) no Hoare annotation was computed. [2018-01-21 08:37:50,758 INFO L404 ceAbstractionStarter]: At program point L1(lines 1 672) the Hoare annotation is: true [2018-01-21 08:37:50,758 INFO L401 ceAbstractionStarter]: For program point ULTIMATE.startErr0EnsuresViolation(lines 1 672) no Hoare annotation was computed. [2018-01-21 08:37:50,758 INFO L401 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(lines 1 672) no Hoare annotation was computed. [2018-01-21 08:37:50,758 INFO L401 ceAbstractionStarter]: For program point L650'(line 650) no Hoare annotation was computed. [2018-01-21 08:37:50,759 INFO L404 ceAbstractionStarter]: At program point L664'''(lines 664 668) the Hoare annotation is: true [2018-01-21 08:37:50,759 INFO L401 ceAbstractionStarter]: For program point L629(line 629) no Hoare annotation was computed. [2018-01-21 08:37:50,759 INFO L401 ceAbstractionStarter]: For program point L635'(line 635) no Hoare annotation was computed. [2018-01-21 08:37:50,759 INFO L401 ceAbstractionStarter]: For program point L664''''(lines 664 668) no Hoare annotation was computed. [2018-01-21 08:37:50,759 INFO L404 ceAbstractionStarter]: At program point L650'''(lines 650 660) the Hoare annotation is: true [2018-01-21 08:37:50,759 INFO L401 ceAbstractionStarter]: For program point L651'(line 651) no Hoare annotation was computed. [2018-01-21 08:37:50,760 INFO L401 ceAbstractionStarter]: For program point mainEXIT(lines 627 672) no Hoare annotation was computed. [2018-01-21 08:37:50,760 INFO L401 ceAbstractionStarter]: For program point L636'(line 636) no Hoare annotation was computed. [2018-01-21 08:37:50,760 INFO L401 ceAbstractionStarter]: For program point L664'(line 664) no Hoare annotation was computed. [2018-01-21 08:37:50,760 INFO L401 ceAbstractionStarter]: For program point L641(line 641) no Hoare annotation was computed. [2018-01-21 08:37:50,760 INFO L401 ceAbstractionStarter]: For program point L644(line 644) no Hoare annotation was computed. [2018-01-21 08:37:50,760 INFO L401 ceAbstractionStarter]: For program point L643(line 643) no Hoare annotation was computed. [2018-01-21 08:37:50,760 INFO L401 ceAbstractionStarter]: For program point L642(line 642) no Hoare annotation was computed. [2018-01-21 08:37:50,761 INFO L401 ceAbstractionStarter]: For program point L647(line 647) no Hoare annotation was computed. [2018-01-21 08:37:50,761 INFO L401 ceAbstractionStarter]: For program point L646(line 646) no Hoare annotation was computed. [2018-01-21 08:37:50,761 INFO L401 ceAbstractionStarter]: For program point L650''''(lines 650 660) no Hoare annotation was computed. [2018-01-21 08:37:50,761 INFO L401 ceAbstractionStarter]: For program point L633'(line 633) no Hoare annotation was computed. [2018-01-21 08:37:50,761 INFO L401 ceAbstractionStarter]: For program point L629'(line 629) no Hoare annotation was computed. [2018-01-21 08:37:50,761 INFO L401 ceAbstractionStarter]: For program point mainErr0EnsuresViolation(lines 627 672) no Hoare annotation was computed. [2018-01-21 08:37:50,761 INFO L401 ceAbstractionStarter]: For program point L630(line 630) no Hoare annotation was computed. [2018-01-21 08:37:50,762 INFO L401 ceAbstractionStarter]: For program point L633(lines 633 645) no Hoare annotation was computed. [2018-01-21 08:37:50,762 INFO L401 ceAbstractionStarter]: For program point L637(line 637) no Hoare annotation was computed. [2018-01-21 08:37:50,762 INFO L401 ceAbstractionStarter]: For program point L636(line 636) no Hoare annotation was computed. [2018-01-21 08:37:50,762 INFO L401 ceAbstractionStarter]: For program point L635(line 635) no Hoare annotation was computed. [2018-01-21 08:37:50,762 INFO L401 ceAbstractionStarter]: For program point L639(line 639) no Hoare annotation was computed. [2018-01-21 08:37:50,763 INFO L401 ceAbstractionStarter]: For program point L651'''(lines 651 657) no Hoare annotation was computed. [2018-01-21 08:37:50,763 INFO L404 ceAbstractionStarter]: At program point L662(line 662) the Hoare annotation is: true [2018-01-21 08:37:50,763 INFO L401 ceAbstractionStarter]: For program point L661(line 661) no Hoare annotation was computed. [2018-01-21 08:37:50,763 INFO L404 ceAbstractionStarter]: At program point L630'(line 630) the Hoare annotation is: true [2018-01-21 08:37:50,763 INFO L401 ceAbstractionStarter]: For program point L666(line 666) no Hoare annotation was computed. [2018-01-21 08:37:50,764 INFO L401 ceAbstractionStarter]: For program point L665(line 665) no Hoare annotation was computed. [2018-01-21 08:37:50,764 INFO L401 ceAbstractionStarter]: For program point L664(lines 664 668) no Hoare annotation was computed. [2018-01-21 08:37:50,764 INFO L401 ceAbstractionStarter]: For program point L669(line 669) no Hoare annotation was computed. [2018-01-21 08:37:50,764 INFO L401 ceAbstractionStarter]: For program point L655'(line 655) no Hoare annotation was computed. [2018-01-21 08:37:50,764 INFO L401 ceAbstractionStarter]: For program point L639'(line 639) no Hoare annotation was computed. [2018-01-21 08:37:50,764 INFO L401 ceAbstractionStarter]: For program point L652(line 652) no Hoare annotation was computed. [2018-01-21 08:37:50,764 INFO L401 ceAbstractionStarter]: For program point L651(line 651) no Hoare annotation was computed. [2018-01-21 08:37:50,765 INFO L401 ceAbstractionStarter]: For program point L650(lines 650 660) no Hoare annotation was computed. [2018-01-21 08:37:50,765 INFO L401 ceAbstractionStarter]: For program point mainFINAL(lines 627 672) no Hoare annotation was computed. [2018-01-21 08:37:50,765 INFO L401 ceAbstractionStarter]: For program point L655(line 655) no Hoare annotation was computed. [2018-01-21 08:37:50,765 INFO L401 ceAbstractionStarter]: For program point L642'''(line 642) no Hoare annotation was computed. [2018-01-21 08:37:50,765 INFO L401 ceAbstractionStarter]: For program point L658(line 658) no Hoare annotation was computed. [2018-01-21 08:37:50,766 INFO L404 ceAbstractionStarter]: At program point mainENTRY(lines 627 672) the Hoare annotation is: true [2018-01-21 08:37:50,766 INFO L404 ceAbstractionStarter]: At program point L633'''''(lines 633 645) the Hoare annotation is: true [2018-01-21 08:37:50,766 INFO L401 ceAbstractionStarter]: For program point L630'''(line 630) no Hoare annotation was computed. [2018-01-21 08:37:50,766 INFO L401 ceAbstractionStarter]: For program point L652'(line 652) no Hoare annotation was computed. [2018-01-21 08:37:50,766 INFO L401 ceAbstractionStarter]: For program point L633''''''(lines 633 645) no Hoare annotation was computed. [2018-01-21 08:37:50,766 INFO L401 ceAbstractionStarter]: For program point L665'(line 665) no Hoare annotation was computed. [2018-01-21 08:37:50,767 INFO L401 ceAbstractionStarter]: For program point L633'''(line 633) no Hoare annotation was computed. [2018-01-21 08:37:50,767 INFO L401 ceAbstractionStarter]: For program point L666'(line 666) no Hoare annotation was computed. [2018-01-21 08:37:50,767 INFO L404 ceAbstractionStarter]: At program point L642'(line 642) the Hoare annotation is: true [2018-01-21 08:37:50,772 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 08:37:50,772 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 08:37:50,772 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 08:37:50,772 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 08:37:50,772 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 08:37:50,773 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 08:37:50,773 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 08:37:50,773 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.initErr0EnsuresViolation======== [2018-01-21 08:37:50,773 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 08:37:50,776 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states. [2018-01-21 08:37:50,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-01-21 08:37:50,777 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 08:37:50,778 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-01-21 08:37:50,778 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.initErr0EnsuresViolation]=== [2018-01-21 08:37:50,784 INFO L82 PathProgramCache]: Analyzing trace with hash 165482, now seen corresponding path program 1 times [2018-01-21 08:37:50,787 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 08:37:50,810 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:37:50,811 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 08:37:50,811 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:37:50,811 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 08:37:50,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 08:37:50,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 08:37:50,874 INFO L381 BasicCegarLoop]: Counterexample might be feasible [2018-01-21 08:37:50,878 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 08:37:50,883 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 08:37:50,883 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 08:37:50,883 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 08:37:50,884 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 08:37:50,884 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 08:37:50,884 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 08:37:50,884 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 08:37:50,884 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.startErr0EnsuresViolation======== [2018-01-21 08:37:50,884 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 08:37:50,886 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states. [2018-01-21 08:37:50,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-01-21 08:37:50,887 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 08:37:50,887 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 08:37:50,887 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 08:37:50,888 INFO L82 PathProgramCache]: Analyzing trace with hash -2074680006, now seen corresponding path program 1 times [2018-01-21 08:37:50,888 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 08:37:50,889 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:37:50,889 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 08:37:50,889 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:37:50,889 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 08:37:50,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 08:37:50,918 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 08:37:50,959 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-21 08:37:51,027 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 08:37:51,027 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-21 08:37:51,028 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 08:37:51,030 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-21 08:37:51,045 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-21 08:37:51,045 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-21 08:37:51,047 INFO L87 Difference]: Start difference. First operand 63 states. Second operand 2 states. [2018-01-21 08:37:51,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 08:37:51,066 INFO L93 Difference]: Finished difference Result 95 states and 114 transitions. [2018-01-21 08:37:51,067 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-21 08:37:51,068 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 21 [2018-01-21 08:37:51,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 08:37:51,074 INFO L225 Difference]: With dead ends: 95 [2018-01-21 08:37:51,075 INFO L226 Difference]: Without dead ends: 55 [2018-01-21 08:37:51,077 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-21 08:37:51,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-01-21 08:37:51,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-01-21 08:37:51,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-01-21 08:37:51,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 60 transitions. [2018-01-21 08:37:51,108 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 60 transitions. Word has length 21 [2018-01-21 08:37:51,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 08:37:51,108 INFO L432 AbstractCegarLoop]: Abstraction has 55 states and 60 transitions. [2018-01-21 08:37:51,108 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-21 08:37:51,108 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 60 transitions. [2018-01-21 08:37:51,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-01-21 08:37:51,109 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 08:37:51,109 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] [2018-01-21 08:37:51,109 INFO L371 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 08:37:51,109 INFO L82 PathProgramCache]: Analyzing trace with hash 973057652, now seen corresponding path program 1 times [2018-01-21 08:37:51,110 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 08:37:51,110 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:37:51,111 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 08:37:51,111 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:37:51,111 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 08:37:51,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 08:37:51,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 08:37:51,186 INFO L381 BasicCegarLoop]: Counterexample might be feasible [2018-01-21 08:37:51,194 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 08:37:51,198 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 08:37:51,198 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 08:37:51,212 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 08:37:51,212 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 08:37:51,212 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 08:37:51,212 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 08:37:51,212 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 08:37:51,212 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 08:37:51,212 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 08:37:51,213 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == mainErr0EnsuresViolation======== [2018-01-21 08:37:51,213 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 08:37:51,214 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states. [2018-01-21 08:37:51,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-01-21 08:37:51,216 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 08:37:51,216 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 08:37:51,216 INFO L371 AbstractCegarLoop]: === Iteration 1 === [mainErr0EnsuresViolation]=== [2018-01-21 08:37:51,216 INFO L82 PathProgramCache]: Analyzing trace with hash 404544579, now seen corresponding path program 1 times [2018-01-21 08:37:51,216 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 08:37:51,217 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:37:51,218 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 08:37:51,218 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:37:51,218 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 08:37:51,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 08:37:51,227 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 08:37:51,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-21 08:37:51,239 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 08:37:51,239 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-21 08:37:51,239 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 08:37:51,240 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-21 08:37:51,240 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-21 08:37:51,240 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-21 08:37:51,240 INFO L87 Difference]: Start difference. First operand 63 states. Second operand 2 states. [2018-01-21 08:37:51,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 08:37:51,247 INFO L93 Difference]: Finished difference Result 95 states and 114 transitions. [2018-01-21 08:37:51,247 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-21 08:37:51,247 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 19 [2018-01-21 08:37:51,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 08:37:51,248 INFO L225 Difference]: With dead ends: 95 [2018-01-21 08:37:51,248 INFO L226 Difference]: Without dead ends: 53 [2018-01-21 08:37:51,249 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-21 08:37:51,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-01-21 08:37:51,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-01-21 08:37:51,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-01-21 08:37:51,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 58 transitions. [2018-01-21 08:37:51,255 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 58 transitions. Word has length 19 [2018-01-21 08:37:51,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 08:37:51,255 INFO L432 AbstractCegarLoop]: Abstraction has 53 states and 58 transitions. [2018-01-21 08:37:51,255 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-21 08:37:51,255 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 58 transitions. [2018-01-21 08:37:51,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-01-21 08:37:51,256 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 08:37:51,256 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] [2018-01-21 08:37:51,256 INFO L371 AbstractCegarLoop]: === Iteration 2 === [mainErr0EnsuresViolation]=== [2018-01-21 08:37:51,257 INFO L82 PathProgramCache]: Analyzing trace with hash -839209987, now seen corresponding path program 1 times [2018-01-21 08:37:51,257 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 08:37:51,257 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:37:51,257 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 08:37:51,258 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:37:51,258 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 08:37:51,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 08:37:51,284 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 08:37:51,458 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-21 08:37:51,458 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 08:37:51,458 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-21 08:37:51,459 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 08:37:51,459 INFO L409 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-01-21 08:37:51,459 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-01-21 08:37:51,460 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-01-21 08:37:51,460 INFO L87 Difference]: Start difference. First operand 53 states and 58 transitions. Second operand 6 states. [2018-01-21 08:37:51,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 08:37:51,800 INFO L93 Difference]: Finished difference Result 111 states and 124 transitions. [2018-01-21 08:37:51,800 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-01-21 08:37:51,801 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 28 [2018-01-21 08:37:51,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 08:37:51,802 INFO L225 Difference]: With dead ends: 111 [2018-01-21 08:37:51,802 INFO L226 Difference]: Without dead ends: 107 [2018-01-21 08:37:51,803 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2018-01-21 08:37:51,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2018-01-21 08:37:51,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 76. [2018-01-21 08:37:51,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2018-01-21 08:37:51,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 85 transitions. [2018-01-21 08:37:51,811 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 85 transitions. Word has length 28 [2018-01-21 08:37:51,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 08:37:51,811 INFO L432 AbstractCegarLoop]: Abstraction has 76 states and 85 transitions. [2018-01-21 08:37:51,811 INFO L433 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-01-21 08:37:51,811 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 85 transitions. [2018-01-21 08:37:51,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-01-21 08:37:51,812 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 08:37:51,812 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] [2018-01-21 08:37:51,812 INFO L371 AbstractCegarLoop]: === Iteration 3 === [mainErr0EnsuresViolation]=== [2018-01-21 08:37:51,812 INFO L82 PathProgramCache]: Analyzing trace with hash 355911597, now seen corresponding path program 1 times [2018-01-21 08:37:51,812 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 08:37:51,813 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:37:51,813 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 08:37:51,813 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:37:51,813 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 08:37:51,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 08:37:51,832 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 08:37:52,051 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-21 08:37:52,052 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 08:37:52,052 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-21 08:37:52,053 INFO L199 CegarAbsIntRunner]: Running AI on error trace of length 36 with the following transitions: [2018-01-21 08:37:52,056 INFO L201 CegarAbsIntRunner]: [0], [1], [2], [8], [10], [14], [16], [19], [25], [54], [55], [56], [60], [62], [65], [92], [97], [101], [103], [106], [108], [109], [110], [111], [112], [116], [117], [120], [126], [127], [137], [138], [139] [2018-01-21 08:37:52,116 INFO L147 AbstractInterpreter]: Using domain VPDomain [2018-01-21 08:37:52,116 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