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-properties/alternating_list_true-unreach-call_true-valid-memsafety.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-2f49842 [2018-01-21 09:00:18,695 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-21 09:00:18,697 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-21 09:00:18,710 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-21 09:00:18,710 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-21 09:00:18,711 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-21 09:00:18,713 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-21 09:00:18,714 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-21 09:00:18,717 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-21 09:00:18,718 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-21 09:00:18,718 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-01-21 09:00:18,719 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-01-21 09:00:18,720 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-01-21 09:00:18,721 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-01-21 09:00:18,722 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-01-21 09:00:18,724 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-01-21 09:00:18,727 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-01-21 09:00:18,729 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-01-21 09:00:18,730 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-01-21 09:00:18,731 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-01-21 09:00:18,733 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-01-21 09:00:18,734 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-01-21 09:00:18,734 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-01-21 09:00:18,735 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-01-21 09:00:18,736 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-01-21 09:00:18,737 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-01-21 09:00:18,737 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-01-21 09:00:18,738 INFO L177 SettingsManager]: PEA to Boogie provides no preferences, ignoring... [2018-01-21 09:00:18,738 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-01-21 09:00:18,738 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-01-21 09:00:18,739 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-01-21 09:00:18,739 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/eq-bench/mempurity-32bit-Automizer_Taipan+AI_EQ_preciseopt.epf [2018-01-21 09:00:18,749 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-21 09:00:18,750 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-21 09:00:18,751 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-21 09:00:18,751 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-21 09:00:18,751 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-21 09:00:18,751 INFO L133 SettingsManager]: * Weq Fattening=true [2018-01-21 09:00:18,751 INFO L133 SettingsManager]: * Flatten before fatten=true [2018-01-21 09:00:18,752 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-21 09:00:18,752 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-21 09:00:18,753 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-21 09:00:18,753 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-21 09:00:18,753 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-21 09:00:18,753 INFO L133 SettingsManager]: * Check allocation purity=true [2018-01-21 09:00:18,753 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-21 09:00:18,754 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-21 09:00:18,754 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-21 09:00:18,754 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-01-21 09:00:18,754 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-21 09:00:18,754 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-01-21 09:00:18,754 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-21 09:00:18,755 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-01-21 09:00:18,755 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-01-21 09:00:18,755 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-21 09:00:18,755 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-01-21 09:00:18,755 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-21 09:00:18,756 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-21 09:00:18,756 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-21 09:00:18,756 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-21 09:00:18,756 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-21 09:00:18,756 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-21 09:00:18,757 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-21 09:00:18,757 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-21 09:00:18,757 INFO L133 SettingsManager]: * Stop after first violation was found=false [2018-01-21 09:00:18,757 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-01-21 09:00:18,757 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-21 09:00:18,758 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-21 09:00:18,758 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-21 09:00:18,758 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-01-21 09:00:18,759 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-21 09:00:18,759 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-21 09:00:18,794 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-21 09:00:18,808 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-21 09:00:18,812 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-21 09:00:18,814 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-21 09:00:18,815 INFO L276 PluginConnector]: CDTParser initialized [2018-01-21 09:00:18,816 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-properties/alternating_list_true-unreach-call_true-valid-memsafety.i [2018-01-21 09:00:19,007 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-21 09:00:19,013 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-21 09:00:19,013 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-21 09:00:19,013 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-21 09:00:19,019 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-21 09:00:19,020 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.01 09:00:18" (1/1) ... [2018-01-21 09:00:19,022 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5d3346b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 09:00:19, skipping insertion in model container [2018-01-21 09:00:19,023 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.01 09:00:18" (1/1) ... [2018-01-21 09:00:19,041 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-21 09:00:19,080 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-21 09:00:19,197 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-21 09:00:19,221 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-21 09:00:19,228 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 09:00:19 WrapperNode [2018-01-21 09:00:19,229 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-21 09:00:19,229 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-21 09:00:19,229 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-21 09:00:19,229 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-21 09:00:19,241 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 09:00:19" (1/1) ... [2018-01-21 09:00:19,241 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 09:00:19" (1/1) ... [2018-01-21 09:00:19,249 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 09:00:19" (1/1) ... [2018-01-21 09:00:19,250 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 09:00:19" (1/1) ... [2018-01-21 09:00:19,253 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 09:00:19" (1/1) ... [2018-01-21 09:00:19,256 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 09:00:19" (1/1) ... [2018-01-21 09:00:19,257 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 09:00:19" (1/1) ... [2018-01-21 09:00:19,259 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-21 09:00:19,259 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-21 09:00:19,259 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-21 09:00:19,259 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-21 09:00:19,261 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 09:00:19" (1/1) ... No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-21 09:00:19,305 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-21 09:00:19,306 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-21 09:00:19,306 INFO L136 BoogieDeclarations]: Found implementation of procedure exit [2018-01-21 09:00:19,306 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-21 09:00:19,306 INFO L128 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2018-01-21 09:00:19,306 INFO L128 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2018-01-21 09:00:19,306 INFO L128 BoogieDeclarations]: Found specification of procedure write~int [2018-01-21 09:00:19,307 INFO L128 BoogieDeclarations]: Found specification of procedure read~int [2018-01-21 09:00:19,307 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-01-21 09:00:19,307 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-01-21 09:00:19,307 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-01-21 09:00:19,307 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2018-01-21 09:00:19,307 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-01-21 09:00:19,307 INFO L128 BoogieDeclarations]: Found specification of procedure malloc [2018-01-21 09:00:19,308 INFO L128 BoogieDeclarations]: Found specification of procedure free [2018-01-21 09:00:19,308 INFO L128 BoogieDeclarations]: Found specification of procedure exit [2018-01-21 09:00:19,308 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-21 09:00:19,308 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-21 09:00:19,308 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-21 09:00:19,546 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-21 09:00:19,547 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.01 09:00:19 BoogieIcfgContainer [2018-01-21 09:00:19,547 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-21 09:00:19,548 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-01-21 09:00:19,548 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-01-21 09:00:19,550 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-01-21 09:00:19,551 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.01 09:00:18" (1/3) ... [2018-01-21 09:00:19,552 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a07671c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.01 09:00:19, skipping insertion in model container [2018-01-21 09:00:19,552 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 09:00:19" (2/3) ... [2018-01-21 09:00:19,552 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a07671c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.01 09:00:19, skipping insertion in model container [2018-01-21 09:00:19,552 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.01 09:00:19" (3/3) ... [2018-01-21 09:00:19,554 INFO L105 eAbstractionObserver]: Analyzing ICFG alternating_list_true-unreach-call_true-valid-memsafety.i [2018-01-21 09:00:19,561 INFO L130 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-01-21 09:00:19,568 INFO L142 ceAbstractionStarter]: Appying trace abstraction to program that has 4 error locations. [2018-01-21 09:00:19,604 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 09:00:19,604 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 09:00:19,604 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 09:00:19,604 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 09:00:19,604 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 09:00:19,604 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 09:00:19,605 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 09:00:19,605 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == exitErr0EnsuresViolation======== [2018-01-21 09:00:19,606 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 09:00:19,624 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states. [2018-01-21 09:00:19,630 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-01-21 09:00:19,658 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 57 states. [2018-01-21 09:00:19,795 INFO L401 ceAbstractionStarter]: For program point exitErr0EnsuresViolation(line 525) no Hoare annotation was computed. [2018-01-21 09:00:19,795 INFO L401 ceAbstractionStarter]: For program point exitFINAL(lines 623 625) no Hoare annotation was computed. [2018-01-21 09:00:19,795 INFO L404 ceAbstractionStarter]: At program point exitENTRY(lines 623 625) the Hoare annotation is: true [2018-01-21 09:00:19,795 INFO L401 ceAbstractionStarter]: For program point exitEXIT(lines 623 625) no Hoare annotation was computed. [2018-01-21 09:00:19,796 INFO L401 ceAbstractionStarter]: For program point L624(line 624) no Hoare annotation was computed. [2018-01-21 09:00:19,796 INFO L401 ceAbstractionStarter]: For program point ULTIMATE.initErr0EnsuresViolation(lines 1 670) no Hoare annotation was computed. [2018-01-21 09:00:19,796 INFO L401 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(lines 1 670) no Hoare annotation was computed. [2018-01-21 09:00:19,796 INFO L404 ceAbstractionStarter]: At program point ULTIMATE.initENTRY(lines 1 670) the Hoare annotation is: true [2018-01-21 09:00:19,796 INFO L401 ceAbstractionStarter]: For program point ULTIMATE.initFINAL(lines 1 670) no Hoare annotation was computed. [2018-01-21 09:00:19,796 INFO L404 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(lines 1 670) the Hoare annotation is: true [2018-01-21 09:00:19,797 INFO L401 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(lines 1 670) no Hoare annotation was computed. [2018-01-21 09:00:19,797 INFO L404 ceAbstractionStarter]: At program point L1(lines 1 670) the Hoare annotation is: true [2018-01-21 09:00:19,797 INFO L401 ceAbstractionStarter]: For program point ULTIMATE.startErr0EnsuresViolation(lines 1 670) no Hoare annotation was computed. [2018-01-21 09:00:19,797 INFO L401 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(lines 1 670) no Hoare annotation was computed. [2018-01-21 09:00:19,797 INFO L401 ceAbstractionStarter]: For program point L663(line 663) no Hoare annotation was computed. [2018-01-21 09:00:19,798 INFO L401 ceAbstractionStarter]: For program point L661(lines 661 665) no Hoare annotation was computed. [2018-01-21 09:00:19,798 INFO L401 ceAbstractionStarter]: For program point L666(line 666) no Hoare annotation was computed. [2018-01-21 09:00:19,798 INFO L401 ceAbstractionStarter]: For program point L664(line 664) no Hoare annotation was computed. [2018-01-21 09:00:19,798 INFO L401 ceAbstractionStarter]: For program point L661'''(lines 661 665) no Hoare annotation was computed. [2018-01-21 09:00:19,798 INFO L401 ceAbstractionStarter]: For program point L629(line 629) no Hoare annotation was computed. [2018-01-21 09:00:19,798 INFO L401 ceAbstractionStarter]: For program point L628(line 628) no Hoare annotation was computed. [2018-01-21 09:00:19,798 INFO L401 ceAbstractionStarter]: For program point L655'(line 655) no Hoare annotation was computed. [2018-01-21 09:00:19,798 INFO L401 ceAbstractionStarter]: For program point L651(line 651) no Hoare annotation was computed. [2018-01-21 09:00:19,799 INFO L404 ceAbstractionStarter]: At program point L656(line 656) the Hoare annotation is: true [2018-01-21 09:00:19,799 INFO L401 ceAbstractionStarter]: For program point L663'(line 663) no Hoare annotation was computed. [2018-01-21 09:00:19,799 INFO L401 ceAbstractionStarter]: For program point mainFINAL(lines 626 670) no Hoare annotation was computed. [2018-01-21 09:00:19,799 INFO L401 ceAbstractionStarter]: For program point L651'(line 651) no Hoare annotation was computed. [2018-01-21 09:00:19,799 INFO L401 ceAbstractionStarter]: For program point L655(line 655) no Hoare annotation was computed. [2018-01-21 09:00:19,799 INFO L401 ceAbstractionStarter]: For program point L629'''(line 629) no Hoare annotation was computed. [2018-01-21 09:00:19,800 INFO L401 ceAbstractionStarter]: For program point L658(line 658) no Hoare annotation was computed. [2018-01-21 09:00:19,800 INFO L401 ceAbstractionStarter]: For program point mainEXIT(lines 626 670) no Hoare annotation was computed. [2018-01-21 09:00:19,800 INFO L404 ceAbstractionStarter]: At program point mainENTRY(lines 626 670) the Hoare annotation is: true [2018-01-21 09:00:19,800 INFO L401 ceAbstractionStarter]: For program point L648'(line 648) no Hoare annotation was computed. [2018-01-21 09:00:19,800 INFO L401 ceAbstractionStarter]: For program point L632'(lines 632 644) no Hoare annotation was computed. [2018-01-21 09:00:19,800 INFO L404 ceAbstractionStarter]: At program point L664'(line 664) the Hoare annotation is: true [2018-01-21 09:00:19,801 INFO L404 ceAbstractionStarter]: At program point L632'''(lines 632 644) the Hoare annotation is: true [2018-01-21 09:00:19,801 INFO L401 ceAbstractionStarter]: For program point L628'(line 628) no Hoare annotation was computed. [2018-01-21 09:00:19,801 INFO L401 ceAbstractionStarter]: For program point L641(line 641) no Hoare annotation was computed. [2018-01-21 09:00:19,801 INFO L401 ceAbstractionStarter]: For program point L640(line 640) no Hoare annotation was computed. [2018-01-21 09:00:19,801 INFO L401 ceAbstractionStarter]: For program point L645(line 645) no Hoare annotation was computed. [2018-01-21 09:00:19,801 INFO L401 ceAbstractionStarter]: For program point L643(line 643) no Hoare annotation was computed. [2018-01-21 09:00:19,801 INFO L401 ceAbstractionStarter]: For program point L632''''(lines 632 644) no Hoare annotation was computed. [2018-01-21 09:00:19,802 INFO L401 ceAbstractionStarter]: For program point L642(line 642) no Hoare annotation was computed. [2018-01-21 09:00:19,802 INFO L401 ceAbstractionStarter]: For program point L649(lines 649 657) no Hoare annotation was computed. [2018-01-21 09:00:19,802 INFO L401 ceAbstractionStarter]: For program point L648(lines 648 659) no Hoare annotation was computed. [2018-01-21 09:00:19,802 INFO L401 ceAbstractionStarter]: For program point L649''(lines 649 657) no Hoare annotation was computed. [2018-01-21 09:00:19,802 INFO L401 ceAbstractionStarter]: For program point L637'(line 637) no Hoare annotation was computed. [2018-01-21 09:00:19,802 INFO L404 ceAbstractionStarter]: At program point L629'(line 629) the Hoare annotation is: true [2018-01-21 09:00:19,803 INFO L401 ceAbstractionStarter]: For program point mainErr0EnsuresViolation(lines 626 670) no Hoare annotation was computed. [2018-01-21 09:00:19,803 INFO L401 ceAbstractionStarter]: For program point L648''''(lines 648 659) no Hoare annotation was computed. [2018-01-21 09:00:19,803 INFO L401 ceAbstractionStarter]: For program point L634(line 634) no Hoare annotation was computed. [2018-01-21 09:00:19,803 INFO L404 ceAbstractionStarter]: At program point L641'(line 641) the Hoare annotation is: true [2018-01-21 09:00:19,803 INFO L401 ceAbstractionStarter]: For program point L633(lines 633 639) no Hoare annotation was computed. [2018-01-21 09:00:19,803 INFO L401 ceAbstractionStarter]: For program point L632(lines 632 644) no Hoare annotation was computed. [2018-01-21 09:00:19,804 INFO L401 ceAbstractionStarter]: For program point L661'(line 661) no Hoare annotation was computed. [2018-01-21 09:00:19,804 INFO L401 ceAbstractionStarter]: For program point L633''(lines 633 639) no Hoare annotation was computed. [2018-01-21 09:00:19,804 INFO L401 ceAbstractionStarter]: For program point L637(line 637) no Hoare annotation was computed. [2018-01-21 09:00:19,804 INFO L404 ceAbstractionStarter]: At program point L648'''(lines 648 659) the Hoare annotation is: true [2018-01-21 09:00:19,804 INFO L401 ceAbstractionStarter]: For program point L641'''(line 641) no Hoare annotation was computed. [2018-01-21 09:00:19,804 INFO L401 ceAbstractionStarter]: For program point L634'(line 634) no Hoare annotation was computed. [2018-01-21 09:00:19,809 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 09:00:19,809 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 09:00:19,809 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 09:00:19,809 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 09:00:19,809 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 09:00:19,809 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 09:00:19,810 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 09:00:19,810 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.initErr0EnsuresViolation======== [2018-01-21 09:00:19,810 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 09:00:19,812 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states. [2018-01-21 09:00:19,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-01-21 09:00:19,813 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 09:00:19,814 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-01-21 09:00:19,814 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.initErr0EnsuresViolation]=== [2018-01-21 09:00:19,819 INFO L82 PathProgramCache]: Analyzing trace with hash 150587, now seen corresponding path program 1 times [2018-01-21 09:00:19,822 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 09:00:19,844 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 09:00:19,844 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 09:00:19,845 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 09:00:19,845 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 09:00:19,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 09:00:19,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 09:00:19,904 INFO L381 BasicCegarLoop]: Counterexample might be feasible [2018-01-21 09:00:19,909 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 09:00:19,915 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 09:00:19,915 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 09:00:19,915 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 09:00:19,916 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 09:00:19,916 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 09:00:19,916 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 09:00:19,916 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 09:00:19,916 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.startErr0EnsuresViolation======== [2018-01-21 09:00:19,916 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 09:00:19,918 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states. [2018-01-21 09:00:19,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-01-21 09:00:19,920 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 09:00:19,921 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 09:00:19,921 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 09:00:19,921 INFO L82 PathProgramCache]: Analyzing trace with hash -633884924, now seen corresponding path program 1 times [2018-01-21 09:00:19,921 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 09:00:19,923 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 09:00:19,923 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 09:00:19,923 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 09:00:19,923 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 09:00:19,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 09:00:19,954 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 09:00:20,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-21 09:00:20,055 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 09:00:20,055 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-21 09:00:20,055 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 09:00:20,058 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-21 09:00:20,067 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-21 09:00:20,068 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-21 09:00:20,070 INFO L87 Difference]: Start difference. First operand 57 states. Second operand 2 states. [2018-01-21 09:00:20,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 09:00:20,087 INFO L93 Difference]: Finished difference Result 85 states and 101 transitions. [2018-01-21 09:00:20,087 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-21 09:00:20,088 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 21 [2018-01-21 09:00:20,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 09:00:20,095 INFO L225 Difference]: With dead ends: 85 [2018-01-21 09:00:20,095 INFO L226 Difference]: Without dead ends: 49 [2018-01-21 09:00:20,097 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-21 09:00:20,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-01-21 09:00:20,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-01-21 09:00:20,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-01-21 09:00:20,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 53 transitions. [2018-01-21 09:00:20,127 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 53 transitions. Word has length 21 [2018-01-21 09:00:20,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 09:00:20,127 INFO L432 AbstractCegarLoop]: Abstraction has 49 states and 53 transitions. [2018-01-21 09:00:20,127 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-21 09:00:20,127 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 53 transitions. [2018-01-21 09:00:20,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-01-21 09:00:20,128 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 09:00:20,128 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] [2018-01-21 09:00:20,128 INFO L371 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 09:00:20,129 INFO L82 PathProgramCache]: Analyzing trace with hash 10332939, now seen corresponding path program 1 times [2018-01-21 09:00:20,129 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 09:00:20,129 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 09:00:20,130 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 09:00:20,130 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 09:00:20,130 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 09:00:20,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 09:00:20,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 09:00:20,175 INFO L381 BasicCegarLoop]: Counterexample might be feasible [2018-01-21 09:00:20,184 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 09:00:20,186 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 09:00:20,187 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 09:00:20,197 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 09:00:20,197 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 09:00:20,197 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 09:00:20,197 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 09:00:20,197 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 09:00:20,197 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 09:00:20,197 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 09:00:20,197 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == mainErr0EnsuresViolation======== [2018-01-21 09:00:20,197 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 09:00:20,198 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states. [2018-01-21 09:00:20,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-01-21 09:00:20,199 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 09:00:20,200 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 09:00:20,200 INFO L371 AbstractCegarLoop]: === Iteration 1 === [mainErr0EnsuresViolation]=== [2018-01-21 09:00:20,200 INFO L82 PathProgramCache]: Analyzing trace with hash 607160941, now seen corresponding path program 1 times [2018-01-21 09:00:20,200 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 09:00:20,201 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 09:00:20,201 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 09:00:20,201 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 09:00:20,201 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 09:00:20,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 09:00:20,210 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 09:00:20,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-21 09:00:20,223 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 09:00:20,223 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-21 09:00:20,223 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 09:00:20,224 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-21 09:00:20,224 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-21 09:00:20,224 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-21 09:00:20,224 INFO L87 Difference]: Start difference. First operand 57 states. Second operand 2 states. [2018-01-21 09:00:20,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 09:00:20,232 INFO L93 Difference]: Finished difference Result 85 states and 101 transitions. [2018-01-21 09:00:20,232 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-21 09:00:20,232 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 19 [2018-01-21 09:00:20,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 09:00:20,233 INFO L225 Difference]: With dead ends: 85 [2018-01-21 09:00:20,233 INFO L226 Difference]: Without dead ends: 47 [2018-01-21 09:00:20,234 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-21 09:00:20,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-01-21 09:00:20,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-01-21 09:00:20,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-01-21 09:00:20,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2018-01-21 09:00:20,240 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 19 [2018-01-21 09:00:20,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 09:00:20,241 INFO L432 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2018-01-21 09:00:20,241 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-21 09:00:20,241 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2018-01-21 09:00:20,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-01-21 09:00:20,242 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 09:00:20,243 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] [2018-01-21 09:00:20,243 INFO L371 AbstractCegarLoop]: === Iteration 2 === [mainErr0EnsuresViolation]=== [2018-01-21 09:00:20,243 INFO L82 PathProgramCache]: Analyzing trace with hash -98313164, now seen corresponding path program 1 times [2018-01-21 09:00:20,243 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 09:00:20,244 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 09:00:20,244 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 09:00:20,244 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 09:00:20,245 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 09:00:20,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 09:00:20,266 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 09:00:20,459 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-21 09:00:20,459 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 09:00:20,460 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-21 09:00:20,460 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 09:00:20,460 INFO L409 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-01-21 09:00:20,461 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-01-21 09:00:20,461 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-01-21 09:00:20,461 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand 6 states. [2018-01-21 09:00:20,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 09:00:20,698 INFO L93 Difference]: Finished difference Result 90 states and 100 transitions. [2018-01-21 09:00:20,698 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-01-21 09:00:20,699 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2018-01-21 09:00:20,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 09:00:20,700 INFO L225 Difference]: With dead ends: 90 [2018-01-21 09:00:20,701 INFO L226 Difference]: Without dead ends: 86 [2018-01-21 09:00:20,702 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-01-21 09:00:20,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2018-01-21 09:00:20,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 66. [2018-01-21 09:00:20,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-01-21 09:00:20,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 73 transitions. [2018-01-21 09:00:20,712 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 73 transitions. Word has length 25 [2018-01-21 09:00:20,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 09:00:20,712 INFO L432 AbstractCegarLoop]: Abstraction has 66 states and 73 transitions. [2018-01-21 09:00:20,712 INFO L433 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-01-21 09:00:20,712 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 73 transitions. [2018-01-21 09:00:20,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-01-21 09:00:20,714 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 09:00:20,714 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] [2018-01-21 09:00:20,714 INFO L371 AbstractCegarLoop]: === Iteration 3 === [mainErr0EnsuresViolation]=== [2018-01-21 09:00:20,714 INFO L82 PathProgramCache]: Analyzing trace with hash 530147864, now seen corresponding path program 1 times [2018-01-21 09:00:20,714 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 09:00:20,715 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 09:00:20,715 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 09:00:20,715 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 09:00:20,715 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 09:00:20,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 09:00:20,727 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 09:00:20,797 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-21 09:00:20,798 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 09:00:20,798 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2018-01-21 09:00:20,798 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 09:00:20,798 INFO L409 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-01-21 09:00:20,799 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-01-21 09:00:20,799 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-01-21 09:00:20,799 INFO L87 Difference]: Start difference. First operand 66 states and 73 transitions. Second operand 7 states. [2018-01-21 09:00:20,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 09:00:20,998 INFO L93 Difference]: Finished difference Result 121 states and 132 transitions. [2018-01-21 09:00:20,998 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-01-21 09:00:20,999 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 31 [2018-01-21 09:00:20,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 09:00:21,000 INFO L225 Difference]: With dead ends: 121 [2018-01-21 09:00:21,033 INFO L226 Difference]: Without dead ends: 88 [2018-01-21 09:00:21,034 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2018-01-21 09:00:21,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2018-01-21 09:00:21,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 57. [2018-01-21 09:00:21,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-01-21 09:00:21,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 62 transitions. [2018-01-21 09:00:21,041 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 62 transitions. Word has length 31 [2018-01-21 09:00:21,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 09:00:21,042 INFO L432 AbstractCegarLoop]: Abstraction has 57 states and 62 transitions. [2018-01-21 09:00:21,042 INFO L433 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-01-21 09:00:21,042 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 62 transitions. [2018-01-21 09:00:21,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-01-21 09:00:21,043 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 09:00:21,043 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] [2018-01-21 09:00:21,044 INFO L371 AbstractCegarLoop]: === Iteration 4 === [mainErr0EnsuresViolation]=== [2018-01-21 09:00:21,044 INFO L82 PathProgramCache]: Analyzing trace with hash 389018762, now seen corresponding path program 1 times [2018-01-21 09:00:21,044 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 09:00:21,045 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 09:00:21,045 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 09:00:21,045 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 09:00:21,046 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 09:00:21,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 09:00:21,066 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 09:00:21,388 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 09:00:21,388 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 09:00:21,388 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-21 09:00:21,389 INFO L199 CegarAbsIntRunner]: Running AI on error trace of length 38 with the following transitions: [2018-01-21 09:00:21,391 INFO L201 CegarAbsIntRunner]: [0], [1], [2], [8], [10], [14], [16], [19], [21], [24], [25], [26], [32], [33], [39], [41], [42], [43], [47], [48], [52], [54], [57], [83], [87], [89], [92], [101], [102], [105], [111], [112], [122], [123], [124] [2018-01-21 09:00:21,448 INFO L147 AbstractInterpreter]: Using domain VPDomain [2018-01-21 09:00:21,449 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