java -Xmx6000000000 -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data ./data --generate-csv --csv-dir ../../../releaseScripts/default/UAutomizer-linux/csv -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/ai/eq-bench/mempurity-32bit-Automizer_Taipan+AI_EQ_preciseopt.epf -i ../../../trunk/examples/svcomp/forester-heap/dll-sorted_true-unreach-call_true-valid-memsafety.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-2f49842 [2018-01-21 09:07:27,798 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-21 09:07:27,800 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-21 09:07:27,815 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-21 09:07:27,815 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-21 09:07:27,816 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-21 09:07:27,817 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-21 09:07:27,818 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-21 09:07:27,820 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-21 09:07:27,821 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-21 09:07:27,821 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-01-21 09:07:27,822 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-01-21 09:07:27,822 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-01-21 09:07:27,823 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-01-21 09:07:27,824 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-01-21 09:07:27,826 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-01-21 09:07:27,829 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-01-21 09:07:27,831 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-01-21 09:07:27,832 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-01-21 09:07:27,834 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-01-21 09:07:27,836 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-01-21 09:07:27,837 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-01-21 09:07:27,837 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-01-21 09:07:27,838 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-01-21 09:07:27,839 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-01-21 09:07:27,840 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-01-21 09:07:27,840 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-01-21 09:07:27,841 INFO L177 SettingsManager]: PEA to Boogie provides no preferences, ignoring... [2018-01-21 09:07:27,841 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-01-21 09:07:27,841 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-01-21 09:07:27,842 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-01-21 09:07:27,843 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/eq-bench/mempurity-32bit-Automizer_Taipan+AI_EQ_preciseopt.epf [2018-01-21 09:07:27,853 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-21 09:07:27,853 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-21 09:07:27,854 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-21 09:07:27,854 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-21 09:07:27,855 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-21 09:07:27,855 INFO L133 SettingsManager]: * Weq Fattening=true [2018-01-21 09:07:27,855 INFO L133 SettingsManager]: * Flatten before fatten=true [2018-01-21 09:07:27,855 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-21 09:07:27,855 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-21 09:07:27,856 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-21 09:07:27,856 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-21 09:07:27,856 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-21 09:07:27,857 INFO L133 SettingsManager]: * Check allocation purity=true [2018-01-21 09:07:27,857 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-21 09:07:27,857 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-21 09:07:27,857 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-21 09:07:27,857 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-01-21 09:07:27,858 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-21 09:07:27,858 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-01-21 09:07:27,858 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-21 09:07:27,858 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-01-21 09:07:27,858 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-01-21 09:07:27,859 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-21 09:07:27,859 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-01-21 09:07:27,859 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-21 09:07:27,859 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-21 09:07:27,859 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-21 09:07:27,860 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-21 09:07:27,860 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-21 09:07:27,860 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-21 09:07:27,860 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-21 09:07:27,860 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-21 09:07:27,860 INFO L133 SettingsManager]: * Stop after first violation was found=false [2018-01-21 09:07:27,861 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-01-21 09:07:27,861 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-21 09:07:27,861 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-21 09:07:27,861 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-21 09:07:27,861 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-01-21 09:07:27,862 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-21 09:07:27,862 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-21 09:07:27,898 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-21 09:07:27,912 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-21 09:07:27,917 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-21 09:07:27,919 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-21 09:07:27,920 INFO L276 PluginConnector]: CDTParser initialized [2018-01-21 09:07:27,921 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/forester-heap/dll-sorted_true-unreach-call_true-valid-memsafety.i [2018-01-21 09:07:28,114 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-21 09:07:28,119 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-21 09:07:28,120 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-21 09:07:28,120 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-21 09:07:28,126 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-21 09:07:28,127 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.01 09:07:28" (1/1) ... [2018-01-21 09:07:28,129 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7c517b10 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 09:07:28, skipping insertion in model container [2018-01-21 09:07:28,130 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.01 09:07:28" (1/1) ... [2018-01-21 09:07:28,144 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-21 09:07:28,186 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-21 09:07:28,319 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-21 09:07:28,349 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-21 09:07:28,358 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 09:07:28 WrapperNode [2018-01-21 09:07:28,358 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-21 09:07:28,359 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-21 09:07:28,359 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-21 09:07:28,359 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-21 09:07:28,370 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 09:07:28" (1/1) ... [2018-01-21 09:07:28,370 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 09:07:28" (1/1) ... [2018-01-21 09:07:28,383 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 09:07:28" (1/1) ... [2018-01-21 09:07:28,384 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 09:07:28" (1/1) ... [2018-01-21 09:07:28,391 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 09:07:28" (1/1) ... [2018-01-21 09:07:28,396 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 09:07:28" (1/1) ... [2018-01-21 09:07:28,398 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 09:07:28" (1/1) ... [2018-01-21 09:07:28,400 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-21 09:07:28,401 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-21 09:07:28,401 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-21 09:07:28,401 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-21 09:07:28,403 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 09:07:28" (1/1) ... No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-21 09:07:28,449 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-21 09:07:28,450 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-21 09:07:28,450 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-21 09:07:28,450 INFO L128 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2018-01-21 09:07:28,450 INFO L128 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2018-01-21 09:07:28,450 INFO L128 BoogieDeclarations]: Found specification of procedure write~int [2018-01-21 09:07:28,450 INFO L128 BoogieDeclarations]: Found specification of procedure read~int [2018-01-21 09:07:28,450 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-01-21 09:07:28,450 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-01-21 09:07:28,450 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-01-21 09:07:28,451 INFO L128 BoogieDeclarations]: Found specification of procedure malloc [2018-01-21 09:07:28,451 INFO L128 BoogieDeclarations]: Found specification of procedure free [2018-01-21 09:07:28,451 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-01-21 09:07:28,451 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2018-01-21 09:07:28,451 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-21 09:07:28,451 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-21 09:07:28,451 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-21 09:07:28,883 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-21 09:07:28,884 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.01 09:07:28 BoogieIcfgContainer [2018-01-21 09:07:28,884 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-21 09:07:28,885 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-01-21 09:07:28,885 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-01-21 09:07:28,887 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-01-21 09:07:28,887 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.01 09:07:28" (1/3) ... [2018-01-21 09:07:28,888 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69547694 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.01 09:07:28, skipping insertion in model container [2018-01-21 09:07:28,888 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 09:07:28" (2/3) ... [2018-01-21 09:07:28,888 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69547694 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.01 09:07:28, skipping insertion in model container [2018-01-21 09:07:28,889 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.01 09:07:28" (3/3) ... [2018-01-21 09:07:28,890 INFO L105 eAbstractionObserver]: Analyzing ICFG dll-sorted_true-unreach-call_true-valid-memsafety.i [2018-01-21 09:07:28,897 INFO L130 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-01-21 09:07:28,904 INFO L142 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2018-01-21 09:07:28,944 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 09:07:28,945 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 09:07:28,945 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 09:07:28,945 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 09:07:28,945 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 09:07:28,945 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 09:07:28,945 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 09:07:28,945 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.initErr0EnsuresViolation======== [2018-01-21 09:07:28,946 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 09:07:28,964 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states. [2018-01-21 09:07:28,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-01-21 09:07:28,970 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 09:07:28,971 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-01-21 09:07:28,971 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.initErr0EnsuresViolation]=== [2018-01-21 09:07:28,975 INFO L82 PathProgramCache]: Analyzing trace with hash 319525, now seen corresponding path program 1 times [2018-01-21 09:07:28,977 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 09:07:29,017 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 09:07:29,018 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 09:07:29,018 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 09:07:29,018 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 09:07:29,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 09:07:29,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 09:07:29,067 INFO L381 BasicCegarLoop]: Counterexample might be feasible [2018-01-21 09:07:29,073 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 09:07:29,081 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 09:07:29,081 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 09:07:29,081 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 09:07:29,082 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 09:07:29,082 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 09:07:29,082 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 09:07:29,082 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 09:07:29,082 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.startErr0EnsuresViolation======== [2018-01-21 09:07:29,082 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 09:07:29,086 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states. [2018-01-21 09:07:29,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-01-21 09:07:29,090 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 09:07:29,090 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 09:07:29,091 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 09:07:29,091 INFO L82 PathProgramCache]: Analyzing trace with hash -1191137443, now seen corresponding path program 1 times [2018-01-21 09:07:29,091 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 09:07:29,092 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 09:07:29,092 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 09:07:29,093 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 09:07:29,093 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 09:07:29,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 09:07:29,131 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 09:07:29,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-21 09:07:29,275 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 09:07:29,275 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-21 09:07:29,276 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 09:07:29,278 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-21 09:07:29,288 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-21 09:07:29,289 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-21 09:07:29,290 INFO L87 Difference]: Start difference. First operand 113 states. Second operand 2 states. [2018-01-21 09:07:29,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 09:07:29,319 INFO L93 Difference]: Finished difference Result 198 states and 264 transitions. [2018-01-21 09:07:29,319 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-21 09:07:29,320 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 34 [2018-01-21 09:07:29,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 09:07:29,331 INFO L225 Difference]: With dead ends: 198 [2018-01-21 09:07:29,331 INFO L226 Difference]: Without dead ends: 110 [2018-01-21 09:07:29,334 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-21 09:07:29,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2018-01-21 09:07:29,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2018-01-21 09:07:29,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2018-01-21 09:07:29,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 121 transitions. [2018-01-21 09:07:29,372 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 121 transitions. Word has length 34 [2018-01-21 09:07:29,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 09:07:29,372 INFO L432 AbstractCegarLoop]: Abstraction has 110 states and 121 transitions. [2018-01-21 09:07:29,372 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-21 09:07:29,372 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 121 transitions. [2018-01-21 09:07:29,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-01-21 09:07:29,375 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 09:07:29,375 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 09:07:29,375 INFO L371 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 09:07:29,375 INFO L82 PathProgramCache]: Analyzing trace with hash -833133189, now seen corresponding path program 1 times [2018-01-21 09:07:29,375 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 09:07:29,376 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 09:07:29,377 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 09:07:29,377 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 09:07:29,377 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 09:07:29,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 09:07:29,404 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 09:07:29,459 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 09:07:29,460 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 09:07:29,460 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-21 09:07:29,460 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 09:07:29,462 INFO L409 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-01-21 09:07:29,462 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-01-21 09:07:29,463 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-01-21 09:07:29,463 INFO L87 Difference]: Start difference. First operand 110 states and 121 transitions. Second operand 3 states. [2018-01-21 09:07:29,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 09:07:29,535 INFO L93 Difference]: Finished difference Result 236 states and 263 transitions. [2018-01-21 09:07:29,536 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-01-21 09:07:29,536 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 51 [2018-01-21 09:07:29,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 09:07:29,541 INFO L225 Difference]: With dead ends: 236 [2018-01-21 09:07:29,541 INFO L226 Difference]: Without dead ends: 137 [2018-01-21 09:07:29,543 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-01-21 09:07:29,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2018-01-21 09:07:29,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 124. [2018-01-21 09:07:29,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2018-01-21 09:07:29,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 136 transitions. [2018-01-21 09:07:29,556 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 136 transitions. Word has length 51 [2018-01-21 09:07:29,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 09:07:29,556 INFO L432 AbstractCegarLoop]: Abstraction has 124 states and 136 transitions. [2018-01-21 09:07:29,556 INFO L433 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-01-21 09:07:29,557 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 136 transitions. [2018-01-21 09:07:29,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-01-21 09:07:29,559 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 09:07:29,559 INFO L322 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 09:07:29,559 INFO L371 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 09:07:29,560 INFO L82 PathProgramCache]: Analyzing trace with hash -487006783, now seen corresponding path program 1 times [2018-01-21 09:07:29,560 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 09:07:29,561 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 09:07:29,561 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 09:07:29,561 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 09:07:29,562 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 09:07:29,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 09:07:29,609 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 09:07:29,755 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-01-21 09:07:29,755 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 09:07:29,755 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-01-21 09:07:29,755 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 09:07:29,756 INFO L409 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-01-21 09:07:29,756 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-01-21 09:07:29,756 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-01-21 09:07:29,756 INFO L87 Difference]: Start difference. First operand 124 states and 136 transitions. Second operand 6 states. [2018-01-21 09:07:30,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 09:07:30,029 INFO L93 Difference]: Finished difference Result 248 states and 273 transitions. [2018-01-21 09:07:30,030 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-01-21 09:07:30,030 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 66 [2018-01-21 09:07:30,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 09:07:30,032 INFO L225 Difference]: With dead ends: 248 [2018-01-21 09:07:30,032 INFO L226 Difference]: Without dead ends: 207 [2018-01-21 09:07:30,033 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2018-01-21 09:07:30,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2018-01-21 09:07:30,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 134. [2018-01-21 09:07:30,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2018-01-21 09:07:30,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 147 transitions. [2018-01-21 09:07:30,043 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 147 transitions. Word has length 66 [2018-01-21 09:07:30,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 09:07:30,044 INFO L432 AbstractCegarLoop]: Abstraction has 134 states and 147 transitions. [2018-01-21 09:07:30,044 INFO L433 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-01-21 09:07:30,044 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 147 transitions. [2018-01-21 09:07:30,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-01-21 09:07:30,047 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 09:07:30,047 INFO L322 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 09:07:30,048 INFO L371 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 09:07:30,048 INFO L82 PathProgramCache]: Analyzing trace with hash 548520625, now seen corresponding path program 1 times [2018-01-21 09:07:30,048 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 09:07:30,049 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 09:07:30,049 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 09:07:30,049 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 09:07:30,049 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 09:07:30,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 09:07:30,081 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 09:07:30,338 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-01-21 09:07:30,338 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 09:07:30,338 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2018-01-21 09:07:30,338 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 09:07:30,339 INFO L409 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-01-21 09:07:30,339 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-01-21 09:07:30,339 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2018-01-21 09:07:30,340 INFO L87 Difference]: Start difference. First operand 134 states and 147 transitions. Second operand 7 states. [2018-01-21 09:07:30,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 09:07:30,587 INFO L93 Difference]: Finished difference Result 229 states and 253 transitions. [2018-01-21 09:07:30,587 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-01-21 09:07:30,588 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 86 [2018-01-21 09:07:30,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 09:07:30,590 INFO L225 Difference]: With dead ends: 229 [2018-01-21 09:07:30,590 INFO L226 Difference]: Without dead ends: 151 [2018-01-21 09:07:30,591 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2018-01-21 09:07:30,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2018-01-21 09:07:30,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 140. [2018-01-21 09:07:30,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2018-01-21 09:07:30,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 154 transitions. [2018-01-21 09:07:30,604 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 154 transitions. Word has length 86 [2018-01-21 09:07:30,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 09:07:30,604 INFO L432 AbstractCegarLoop]: Abstraction has 140 states and 154 transitions. [2018-01-21 09:07:30,604 INFO L433 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-01-21 09:07:30,604 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 154 transitions. [2018-01-21 09:07:30,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-01-21 09:07:30,606 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 09:07:30,606 INFO L322 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 09:07:30,606 INFO L371 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 09:07:30,607 INFO L82 PathProgramCache]: Analyzing trace with hash -1500867217, now seen corresponding path program 1 times [2018-01-21 09:07:30,607 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 09:07:30,608 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 09:07:30,608 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 09:07:30,608 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 09:07:30,608 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 09:07:30,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 09:07:30,635 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 09:07:30,761 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-01-21 09:07:30,762 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 09:07:30,762 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-21 09:07:30,763 INFO L199 CegarAbsIntRunner]: Running AI on error trace of length 87 with the following transitions: [2018-01-21 09:07:30,765 INFO L201 CegarAbsIntRunner]: [0], [1], [2], [3], [4], [5], [9], [11], [14], [16], [17], [18], [19], [20], [21], [22], [23], [24], [25], [28], [34], [35], [43], [47], [52], [56], [62], [66], [68], [69], [77], [81], [91], [93], [94], [99], [103], [130], [131], [132], [133], [134], [135], [138], [139], [150], [154], [156], [159], [160], [161], [167], [215], [219], [221], [222], [223], [227], [228], [233], [237], [245], [250], [254], [260], [261], [265], [269], [273], [275], [276], [277], [278], [282], [283], [285], [286], [291], [292], [293], [294], [295] [2018-01-21 09:07:30,815 INFO L147 AbstractInterpreter]: Using domain VPDomain [2018-01-21 09:07:30,815 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