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/list-ext-properties/list-ext_1_true-valid-memsafety.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-2f49842 [2018-01-21 05:55:34,267 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-21 05:55:34,269 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-21 05:55:34,284 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-21 05:55:34,285 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-21 05:55:34,286 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-21 05:55:34,287 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-21 05:55:34,288 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-21 05:55:34,290 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-21 05:55:34,290 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-21 05:55:34,291 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-01-21 05:55:34,291 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-01-21 05:55:34,292 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-01-21 05:55:34,293 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-01-21 05:55:34,293 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-01-21 05:55:34,296 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-01-21 05:55:34,298 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-01-21 05:55:34,300 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-01-21 05:55:34,302 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-01-21 05:55:34,303 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-01-21 05:55:34,305 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-01-21 05:55:34,306 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-01-21 05:55:34,306 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-01-21 05:55:34,307 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-01-21 05:55:34,308 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-01-21 05:55:34,309 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-01-21 05:55:34,309 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-01-21 05:55:34,310 INFO L177 SettingsManager]: PEA to Boogie provides no preferences, ignoring... [2018-01-21 05:55:34,310 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-01-21 05:55:34,310 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-01-21 05:55:34,311 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-01-21 05:55:34,311 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 05:55:34,321 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-21 05:55:34,322 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-21 05:55:34,323 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-21 05:55:34,323 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-21 05:55:34,323 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-21 05:55:34,323 INFO L133 SettingsManager]: * Weq Fattening=true [2018-01-21 05:55:34,323 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-21 05:55:34,324 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-21 05:55:34,324 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-21 05:55:34,324 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-21 05:55:34,325 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-21 05:55:34,325 INFO L133 SettingsManager]: * Check allocation purity=true [2018-01-21 05:55:34,325 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-21 05:55:34,325 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-21 05:55:34,325 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-21 05:55:34,326 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-01-21 05:55:34,326 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-21 05:55:34,326 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-01-21 05:55:34,326 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-21 05:55:34,326 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-01-21 05:55:34,327 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-01-21 05:55:34,327 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-21 05:55:34,327 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-01-21 05:55:34,327 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-21 05:55:34,327 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-21 05:55:34,328 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-21 05:55:34,328 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-21 05:55:34,328 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-21 05:55:34,328 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-21 05:55:34,329 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-21 05:55:34,329 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-21 05:55:34,329 INFO L133 SettingsManager]: * Stop after first violation was found=false [2018-01-21 05:55:34,329 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-01-21 05:55:34,329 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-21 05:55:34,329 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-21 05:55:34,329 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-21 05:55:34,330 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-01-21 05:55:34,330 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-21 05:55:34,331 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-21 05:55:34,365 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-21 05:55:34,378 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-21 05:55:34,382 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-21 05:55:34,384 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-21 05:55:34,384 INFO L276 PluginConnector]: CDTParser initialized [2018-01-21 05:55:34,385 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-ext-properties/list-ext_1_true-valid-memsafety.i [2018-01-21 05:55:34,583 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-21 05:55:34,588 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-21 05:55:34,589 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-21 05:55:34,589 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-21 05:55:34,595 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-21 05:55:34,596 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.01 05:55:34" (1/1) ... [2018-01-21 05:55:34,599 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6479bd29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 05:55:34, skipping insertion in model container [2018-01-21 05:55:34,599 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.01 05:55:34" (1/1) ... [2018-01-21 05:55:34,613 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-21 05:55:34,651 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-21 05:55:34,782 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-21 05:55:34,804 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-21 05:55:34,814 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 05:55:34 WrapperNode [2018-01-21 05:55:34,814 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-21 05:55:34,815 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-21 05:55:34,815 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-21 05:55:34,815 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-21 05:55:34,833 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 05:55:34" (1/1) ... [2018-01-21 05:55:34,833 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 05:55:34" (1/1) ... [2018-01-21 05:55:34,844 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 05:55:34" (1/1) ... [2018-01-21 05:55:34,844 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 05:55:34" (1/1) ... [2018-01-21 05:55:34,850 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 05:55:34" (1/1) ... [2018-01-21 05:55:34,854 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 05:55:34" (1/1) ... [2018-01-21 05:55:34,855 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 05:55:34" (1/1) ... [2018-01-21 05:55:34,857 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-21 05:55:34,858 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-21 05:55:34,858 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-21 05:55:34,858 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-21 05:55:34,860 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 05:55:34" (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 05:55:34,916 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-21 05:55:34,916 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-21 05:55:34,916 INFO L136 BoogieDeclarations]: Found implementation of procedure exit [2018-01-21 05:55:34,916 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-21 05:55:34,917 INFO L128 BoogieDeclarations]: Found specification of procedure write~int [2018-01-21 05:55:34,917 INFO L128 BoogieDeclarations]: Found specification of procedure read~int [2018-01-21 05:55:34,917 INFO L128 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2018-01-21 05:55:34,917 INFO L128 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2018-01-21 05:55:34,917 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-01-21 05:55:34,917 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-01-21 05:55:34,917 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-01-21 05:55:34,917 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2018-01-21 05:55:34,917 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-01-21 05:55:34,917 INFO L128 BoogieDeclarations]: Found specification of procedure malloc [2018-01-21 05:55:34,917 INFO L128 BoogieDeclarations]: Found specification of procedure free [2018-01-21 05:55:34,918 INFO L128 BoogieDeclarations]: Found specification of procedure exit [2018-01-21 05:55:34,918 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-21 05:55:34,918 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-21 05:55:34,918 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-21 05:55:35,225 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-21 05:55:35,226 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.01 05:55:35 BoogieIcfgContainer [2018-01-21 05:55:35,226 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-21 05:55:35,227 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-01-21 05:55:35,227 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-01-21 05:55:35,230 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-01-21 05:55:35,230 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.01 05:55:34" (1/3) ... [2018-01-21 05:55:35,232 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e936bb2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.01 05:55:35, skipping insertion in model container [2018-01-21 05:55:35,232 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 05:55:34" (2/3) ... [2018-01-21 05:55:35,232 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e936bb2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.01 05:55:35, skipping insertion in model container [2018-01-21 05:55:35,233 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.01 05:55:35" (3/3) ... [2018-01-21 05:55:35,235 INFO L105 eAbstractionObserver]: Analyzing ICFG list-ext_1_true-valid-memsafety.i [2018-01-21 05:55:35,244 INFO L130 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-01-21 05:55:35,252 INFO L142 ceAbstractionStarter]: Appying trace abstraction to program that has 4 error locations. [2018-01-21 05:55:35,304 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 05:55:35,304 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 05:55:35,304 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 05:55:35,304 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 05:55:35,304 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 05:55:35,305 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 05:55:35,305 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 05:55:35,305 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == exitErr0EnsuresViolation======== [2018-01-21 05:55:35,306 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 05:55:35,328 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states. [2018-01-21 05:55:35,336 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-01-21 05:55:35,347 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 70 states. [2018-01-21 05:55:35,413 INFO L401 ceAbstractionStarter]: For program point exitErr0EnsuresViolation(line 525) no Hoare annotation was computed. [2018-01-21 05:55:35,413 INFO L401 ceAbstractionStarter]: For program point exitFINAL(lines 619 621) no Hoare annotation was computed. [2018-01-21 05:55:35,413 INFO L404 ceAbstractionStarter]: At program point exitENTRY(lines 619 621) the Hoare annotation is: true [2018-01-21 05:55:35,414 INFO L401 ceAbstractionStarter]: For program point L620(line 620) no Hoare annotation was computed. [2018-01-21 05:55:35,414 INFO L401 ceAbstractionStarter]: For program point exitEXIT(lines 619 621) no Hoare annotation was computed. [2018-01-21 05:55:35,414 INFO L401 ceAbstractionStarter]: For program point ULTIMATE.initErr0EnsuresViolation(lines 1 672) no Hoare annotation was computed. [2018-01-21 05:55:35,414 INFO L401 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(lines 1 672) no Hoare annotation was computed. [2018-01-21 05:55:35,414 INFO L404 ceAbstractionStarter]: At program point ULTIMATE.initENTRY(lines 1 672) the Hoare annotation is: true [2018-01-21 05:55:35,415 INFO L401 ceAbstractionStarter]: For program point ULTIMATE.initFINAL(lines 1 672) no Hoare annotation was computed. [2018-01-21 05:55:35,415 INFO L404 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(lines 1 672) the Hoare annotation is: true [2018-01-21 05:55:35,415 INFO L401 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(lines 1 672) no Hoare annotation was computed. [2018-01-21 05:55:35,415 INFO L404 ceAbstractionStarter]: At program point L1(lines 1 672) the Hoare annotation is: true [2018-01-21 05:55:35,415 INFO L401 ceAbstractionStarter]: For program point ULTIMATE.startErr0EnsuresViolation(lines 1 672) no Hoare annotation was computed. [2018-01-21 05:55:35,416 INFO L401 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(lines 1 672) no Hoare annotation was computed. [2018-01-21 05:55:35,416 INFO L401 ceAbstractionStarter]: For program point L641'''''(lines 641 648) no Hoare annotation was computed. [2018-01-21 05:55:35,416 INFO L401 ceAbstractionStarter]: For program point L629(line 629) no Hoare annotation was computed. [2018-01-21 05:55:35,416 INFO L401 ceAbstractionStarter]: For program point L635'(line 635) no Hoare annotation was computed. [2018-01-21 05:55:35,416 INFO L401 ceAbstractionStarter]: For program point L641''''''(lines 641 648) no Hoare annotation was computed. [2018-01-21 05:55:35,416 INFO L401 ceAbstractionStarter]: For program point L658'''(lines 658 661) no Hoare annotation was computed. [2018-01-21 05:55:35,417 INFO L401 ceAbstractionStarter]: For program point mainEXIT(lines 626 672) no Hoare annotation was computed. [2018-01-21 05:55:35,417 INFO L401 ceAbstractionStarter]: For program point L641(lines 641 648) no Hoare annotation was computed. [2018-01-21 05:55:35,417 INFO L401 ceAbstractionStarter]: For program point L645(line 645) no Hoare annotation was computed. [2018-01-21 05:55:35,417 INFO L401 ceAbstractionStarter]: For program point L644(line 644) no Hoare annotation was computed. [2018-01-21 05:55:35,417 INFO L401 ceAbstractionStarter]: For program point L643(line 643) no Hoare annotation was computed. [2018-01-21 05:55:35,417 INFO L401 ceAbstractionStarter]: For program point L660'(line 660) no Hoare annotation was computed. [2018-01-21 05:55:35,417 INFO L401 ceAbstractionStarter]: For program point L649(line 649) no Hoare annotation was computed. [2018-01-21 05:55:35,418 INFO L401 ceAbstractionStarter]: For program point L647(line 647) no Hoare annotation was computed. [2018-01-21 05:55:35,418 INFO L401 ceAbstractionStarter]: For program point L646(line 646) no Hoare annotation was computed. [2018-01-21 05:55:35,418 INFO L404 ceAbstractionStarter]: At program point L645'(line 645) the Hoare annotation is: true [2018-01-21 05:55:35,418 INFO L401 ceAbstractionStarter]: For program point L633'(line 633) no Hoare annotation was computed. [2018-01-21 05:55:35,418 INFO L401 ceAbstractionStarter]: For program point L629'(line 629) no Hoare annotation was computed. [2018-01-21 05:55:35,418 INFO L401 ceAbstractionStarter]: For program point L637'''(line 637) no Hoare annotation was computed. [2018-01-21 05:55:35,419 INFO L401 ceAbstractionStarter]: For program point mainErr0EnsuresViolation(lines 626 672) no Hoare annotation was computed. [2018-01-21 05:55:35,419 INFO L401 ceAbstractionStarter]: For program point L630(line 630) no Hoare annotation was computed. [2018-01-21 05:55:35,419 INFO L401 ceAbstractionStarter]: For program point L665''''(lines 665 669) no Hoare annotation was computed. [2018-01-21 05:55:35,419 INFO L401 ceAbstractionStarter]: For program point L633(lines 633 640) no Hoare annotation was computed. [2018-01-21 05:55:35,419 INFO L401 ceAbstractionStarter]: For program point L638(line 638) no Hoare annotation was computed. [2018-01-21 05:55:35,419 INFO L401 ceAbstractionStarter]: For program point L637(line 637) no Hoare annotation was computed. [2018-01-21 05:55:35,420 INFO L401 ceAbstractionStarter]: For program point L636(line 636) no Hoare annotation was computed. [2018-01-21 05:55:35,420 INFO L404 ceAbstractionStarter]: At program point L665'''(lines 665 669) the Hoare annotation is: true [2018-01-21 05:55:35,420 INFO L401 ceAbstractionStarter]: For program point L635(line 635) no Hoare annotation was computed. [2018-01-21 05:55:35,420 INFO L401 ceAbstractionStarter]: For program point L658'(line 658) no Hoare annotation was computed. [2018-01-21 05:55:35,420 INFO L401 ceAbstractionStarter]: For program point L639(line 639) no Hoare annotation was computed. [2018-01-21 05:55:35,421 INFO L401 ceAbstractionStarter]: For program point L663(line 663) no Hoare annotation was computed. [2018-01-21 05:55:35,421 INFO L401 ceAbstractionStarter]: For program point L662(line 662) no Hoare annotation was computed. [2018-01-21 05:55:35,421 INFO L401 ceAbstractionStarter]: For program point L660(line 660) no Hoare annotation was computed. [2018-01-21 05:55:35,421 INFO L404 ceAbstractionStarter]: At program point L630'(line 630) the Hoare annotation is: true [2018-01-21 05:55:35,421 INFO L401 ceAbstractionStarter]: For program point L645'''(line 645) no Hoare annotation was computed. [2018-01-21 05:55:35,421 INFO L401 ceAbstractionStarter]: For program point L667(line 667) no Hoare annotation was computed. [2018-01-21 05:55:35,422 INFO L401 ceAbstractionStarter]: For program point L666(line 666) no Hoare annotation was computed. [2018-01-21 05:55:35,422 INFO L401 ceAbstractionStarter]: For program point L665(lines 665 669) no Hoare annotation was computed. [2018-01-21 05:55:35,422 INFO L401 ceAbstractionStarter]: For program point L667'(line 667) no Hoare annotation was computed. [2018-01-21 05:55:35,422 INFO L401 ceAbstractionStarter]: For program point L643'(line 643) no Hoare annotation was computed. [2018-01-21 05:55:35,422 INFO L404 ceAbstractionStarter]: At program point L654'''(lines 654 657) the Hoare annotation is: true [2018-01-21 05:55:35,422 INFO L401 ceAbstractionStarter]: For program point L650(line 650) no Hoare annotation was computed. [2018-01-21 05:55:35,423 INFO L401 ceAbstractionStarter]: For program point L656(line 656) no Hoare annotation was computed. [2018-01-21 05:55:35,423 INFO L401 ceAbstractionStarter]: For program point mainFINAL(lines 626 672) no Hoare annotation was computed. [2018-01-21 05:55:35,423 INFO L401 ceAbstractionStarter]: For program point L654(lines 654 657) no Hoare annotation was computed. [2018-01-21 05:55:35,423 INFO L401 ceAbstractionStarter]: For program point L658(lines 658 661) no Hoare annotation was computed. [2018-01-21 05:55:35,423 INFO L404 ceAbstractionStarter]: At program point mainENTRY(lines 626 672) the Hoare annotation is: true [2018-01-21 05:55:35,423 INFO L404 ceAbstractionStarter]: At program point L633'''''(lines 633 640) the Hoare annotation is: true [2018-01-21 05:55:35,424 INFO L401 ceAbstractionStarter]: For program point L656'(line 656) no Hoare annotation was computed. [2018-01-21 05:55:35,424 INFO L401 ceAbstractionStarter]: For program point L630'''(line 630) no Hoare annotation was computed. [2018-01-21 05:55:35,424 INFO L401 ceAbstractionStarter]: For program point L662''(lines 662 663) no Hoare annotation was computed. [2018-01-21 05:55:35,424 INFO L401 ceAbstractionStarter]: For program point L658''''(lines 658 661) no Hoare annotation was computed. [2018-01-21 05:55:35,424 INFO L404 ceAbstractionStarter]: At program point L637'(line 637) the Hoare annotation is: true [2018-01-21 05:55:35,424 INFO L401 ceAbstractionStarter]: For program point L665'(line 665) no Hoare annotation was computed. [2018-01-21 05:55:35,425 INFO L401 ceAbstractionStarter]: For program point L633'''(line 633) no Hoare annotation was computed. [2018-01-21 05:55:35,425 INFO L401 ceAbstractionStarter]: For program point L670(line 670) no Hoare annotation was computed. [2018-01-21 05:55:35,425 INFO L401 ceAbstractionStarter]: For program point L641'(line 641) no Hoare annotation was computed. [2018-01-21 05:55:35,425 INFO L401 ceAbstractionStarter]: For program point L641'''(line 641) no Hoare annotation was computed. [2018-01-21 05:55:35,425 INFO L401 ceAbstractionStarter]: For program point L666'(line 666) no Hoare annotation was computed. [2018-01-21 05:55:35,425 INFO L401 ceAbstractionStarter]: For program point L654'(line 654) no Hoare annotation was computed. [2018-01-21 05:55:35,430 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 05:55:35,430 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 05:55:35,430 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 05:55:35,431 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 05:55:35,431 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 05:55:35,431 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 05:55:35,431 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 05:55:35,431 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.initErr0EnsuresViolation======== [2018-01-21 05:55:35,431 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 05:55:35,434 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states. [2018-01-21 05:55:35,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-01-21 05:55:35,435 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 05:55:35,436 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-01-21 05:55:35,436 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.initErr0EnsuresViolation]=== [2018-01-21 05:55:35,442 INFO L82 PathProgramCache]: Analyzing trace with hash 188257, now seen corresponding path program 1 times [2018-01-21 05:55:35,445 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 05:55:35,468 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 05:55:35,469 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 05:55:35,469 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 05:55:35,469 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 05:55:35,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 05:55:35,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 05:55:35,531 INFO L381 BasicCegarLoop]: Counterexample might be feasible [2018-01-21 05:55:35,536 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 05:55:35,542 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 05:55:35,542 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 05:55:35,542 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 05:55:35,542 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 05:55:35,543 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 05:55:35,543 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 05:55:35,543 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 05:55:35,543 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.startErr0EnsuresViolation======== [2018-01-21 05:55:35,543 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 05:55:35,546 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states. [2018-01-21 05:55:35,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-01-21 05:55:35,548 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 05:55:35,548 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] [2018-01-21 05:55:35,548 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 05:55:35,549 INFO L82 PathProgramCache]: Analyzing trace with hash -1932365681, now seen corresponding path program 1 times [2018-01-21 05:55:35,549 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 05:55:35,550 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 05:55:35,550 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 05:55:35,550 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 05:55:35,551 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 05:55:35,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 05:55:35,577 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 05:55:35,686 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 05:55:35,688 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 05:55:35,689 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-21 05:55:35,689 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 05:55:35,692 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-21 05:55:35,701 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-21 05:55:35,702 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-21 05:55:35,704 INFO L87 Difference]: Start difference. First operand 70 states. Second operand 2 states. [2018-01-21 05:55:35,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 05:55:35,726 INFO L93 Difference]: Finished difference Result 116 states and 139 transitions. [2018-01-21 05:55:35,726 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-21 05:55:35,727 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 26 [2018-01-21 05:55:35,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 05:55:35,736 INFO L225 Difference]: With dead ends: 116 [2018-01-21 05:55:35,736 INFO L226 Difference]: Without dead ends: 61 [2018-01-21 05:55:35,738 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 05:55:35,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-01-21 05:55:35,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-01-21 05:55:35,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-01-21 05:55:35,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 67 transitions. [2018-01-21 05:55:35,771 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 67 transitions. Word has length 26 [2018-01-21 05:55:35,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 05:55:35,772 INFO L432 AbstractCegarLoop]: Abstraction has 61 states and 67 transitions. [2018-01-21 05:55:35,772 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-21 05:55:35,772 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 67 transitions. [2018-01-21 05:55:35,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-01-21 05:55:35,774 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 05:55:35,774 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 05:55:35,774 INFO L371 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 05:55:35,774 INFO L82 PathProgramCache]: Analyzing trace with hash 1521926025, now seen corresponding path program 1 times [2018-01-21 05:55:35,774 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 05:55:35,775 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 05:55:35,776 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 05:55:35,776 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 05:55:35,776 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 05:55:35,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 05:55:35,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 05:55:35,875 INFO L381 BasicCegarLoop]: Counterexample might be feasible [2018-01-21 05:55:35,885 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 05:55:35,891 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 05:55:35,892 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 05:55:35,907 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 05:55:35,907 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 05:55:35,907 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 05:55:35,907 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 05:55:35,907 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 05:55:35,907 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 05:55:35,907 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 05:55:35,907 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == mainErr0EnsuresViolation======== [2018-01-21 05:55:35,908 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 05:55:35,909 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states. [2018-01-21 05:55:35,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-01-21 05:55:35,911 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 05:55:35,911 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] [2018-01-21 05:55:35,911 INFO L371 AbstractCegarLoop]: === Iteration 1 === [mainErr0EnsuresViolation]=== [2018-01-21 05:55:35,911 INFO L82 PathProgramCache]: Analyzing trace with hash -1812064646, now seen corresponding path program 1 times [2018-01-21 05:55:35,912 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 05:55:35,913 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 05:55:35,913 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 05:55:35,913 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 05:55:35,913 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 05:55:35,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 05:55:35,924 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 05:55:35,938 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 05:55:35,939 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 05:55:35,939 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-21 05:55:35,939 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 05:55:35,939 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-21 05:55:35,939 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-21 05:55:35,940 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-21 05:55:35,940 INFO L87 Difference]: Start difference. First operand 70 states. Second operand 2 states. [2018-01-21 05:55:35,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 05:55:35,947 INFO L93 Difference]: Finished difference Result 116 states and 139 transitions. [2018-01-21 05:55:35,948 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-21 05:55:35,948 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 24 [2018-01-21 05:55:35,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 05:55:35,949 INFO L225 Difference]: With dead ends: 116 [2018-01-21 05:55:35,949 INFO L226 Difference]: Without dead ends: 59 [2018-01-21 05:55:35,950 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 05:55:35,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-01-21 05:55:35,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-01-21 05:55:35,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-01-21 05:55:35,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 65 transitions. [2018-01-21 05:55:35,957 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 65 transitions. Word has length 24 [2018-01-21 05:55:35,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 05:55:35,957 INFO L432 AbstractCegarLoop]: Abstraction has 59 states and 65 transitions. [2018-01-21 05:55:35,958 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-21 05:55:35,958 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 65 transitions. [2018-01-21 05:55:35,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-01-21 05:55:35,959 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 05:55:35,959 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 05:55:35,959 INFO L371 AbstractCegarLoop]: === Iteration 2 === [mainErr0EnsuresViolation]=== [2018-01-21 05:55:35,960 INFO L82 PathProgramCache]: Analyzing trace with hash 314432500, now seen corresponding path program 1 times [2018-01-21 05:55:35,960 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 05:55:35,960 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 05:55:35,961 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 05:55:35,961 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 05:55:35,961 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 05:55:35,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 05:55:35,987 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 05:55:36,176 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 05:55:36,176 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 05:55:36,176 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-21 05:55:36,176 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 05:55:36,177 INFO L409 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-01-21 05:55:36,177 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-01-21 05:55:36,177 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-01-21 05:55:36,177 INFO L87 Difference]: Start difference. First operand 59 states and 65 transitions. Second operand 6 states. [2018-01-21 05:55:36,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 05:55:36,475 INFO L93 Difference]: Finished difference Result 118 states and 133 transitions. [2018-01-21 05:55:36,475 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-01-21 05:55:36,475 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 36 [2018-01-21 05:55:36,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 05:55:36,478 INFO L225 Difference]: With dead ends: 118 [2018-01-21 05:55:36,478 INFO L226 Difference]: Without dead ends: 114 [2018-01-21 05:55:36,479 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 05:55:36,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2018-01-21 05:55:36,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 86. [2018-01-21 05:55:36,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2018-01-21 05:55:36,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 98 transitions. [2018-01-21 05:55:36,491 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 98 transitions. Word has length 36 [2018-01-21 05:55:36,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 05:55:36,492 INFO L432 AbstractCegarLoop]: Abstraction has 86 states and 98 transitions. [2018-01-21 05:55:36,492 INFO L433 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-01-21 05:55:36,492 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 98 transitions. [2018-01-21 05:55:36,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-01-21 05:55:36,494 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 05:55:36,494 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] [2018-01-21 05:55:36,494 INFO L371 AbstractCegarLoop]: === Iteration 3 === [mainErr0EnsuresViolation]=== [2018-01-21 05:55:36,495 INFO L82 PathProgramCache]: Analyzing trace with hash 721961098, now seen corresponding path program 1 times [2018-01-21 05:55:36,495 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 05:55:36,496 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 05:55:36,496 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 05:55:36,496 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 05:55:36,496 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 05:55:36,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 05:55:36,522 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 05:55:36,791 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 05:55:36,792 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 05:55:36,792 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-21 05:55:36,793 INFO L199 CegarAbsIntRunner]: Running AI on error trace of length 44 with the following transitions: [2018-01-21 05:55:36,795 INFO L201 CegarAbsIntRunner]: [0], [1], [2], [8], [10], [14], [16], [19], [25], [46], [48], [51], [57], [76], [77], [78], [82], [84], [87], [97], [99], [102], [110], [117], [119], [123], [125], [128], [130], [131], [132], [133], [134], [138], [139], [141], [147], [148], [160], [161], [162] [2018-01-21 05:55:36,842 INFO L147 AbstractInterpreter]: Using domain VPDomain [2018-01-21 05:55:36,843 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